Let WLToolkit work with DISPLAY unset

Extracted X11-related code from libfontmanager into libfontmanager_xawt

README.md

@@ -1,5 +1,58 @@
 # Welcome to the JDK!
 
+## Wakefield
+This is a temporary section created to host information on the
+[Wakefield](https://wiki.openjdk.java.net/display/wakefield) project.
+
+### Building
+There are two addition `configure` arguments:
+```
+  --with-wayland          specify prefix directory for the wayland package
+                          (expecting the headers under PATH/include)
+  --with-wayland-include  specify directory for the wayland include files
+```
+As usual, there should be no need to specify those explicitly unless you're doing
+something tricky.
+However, a variant of `libwayland-dev` needs to be installed on the build system.
+
+### Running
+Make sure your system is configured such that `libwayland` can find the socket to connect to;
+usually this means that the environment variable `WAYLAND_DISPLAY` is set to something
+sensible. Then add this argument to `java`
+```
+-Dawt.toolkit.name=WLToolkit
+```
+
+### Testing
+Testing that involves `Robot` is done inside a [Weston](https://gitlab.freedesktop.org/wayland/weston/)
+instance with a special module loaded called `libwakefield`
+that provides the necessary functionality. The Wayland-specific tests are therefore executed with a dedicated test driver
+`test/jdk/java/awt/wakefield/WakefieldTestDriver.java`. The driver also provides an easy
+way to run the test in several configurations with a different size and even number
+of "outputs" (monitors).
+
+To run the Wayland-specific tests, perform these steps:
+* Install Weston version 9 (earlier versions are known NOT to work).
+* Obtain `libwakefield.so` either by building from source (available under
+`src/java.desktop/share/native/libwakefield` and not integrated into the rest of the
+build infrastructure; see `README.md` there)
+or by fetching the latest pre-built `x64` binary
+```
+wget https://github.com/mkartashev/wakefield/raw/main/libwakefield.so
+```
+* Set `LIBWAKEFIELD` environment variable to the full path to `libwakefield.so`
+```
+export LIBWAKEFIELD=/tmp/wakefield-testing/libwakefield.so
+```
+* Run `jtreg` like so
+```
+jtreg -e:XDG_RUNTIME_DIR -e:LIBWAKEFIELD -testjdk:... test/jdk/java/awt/wakefield/
+```
+
+This was verified to work in `Ubuntu 21.10`.
+This does NOT work in `Ubuntu 21.04` or `Fedora 34`.
+
+## Generic Info (not Wakefield-specific)
 For build instructions please see the
 [online documentation](https://openjdk.java.net/groups/build/doc/building.html),
 or either of these files:

make/autoconf/lib-wayland.m4

@@ -0,0 +1,91 @@
+#
+# Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2021, JetBrains s.r.o.. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Setup wayland
+################################################################################
+AC_DEFUN_ONCE([LIB_SETUP_WAYLAND],
+[
+  AC_ARG_WITH(wayland, [AS_HELP_STRING([--with-wayland],
+      [specify prefix directory for the wayland package
+      (expecting the headers under PATH/include)])])
+  AC_ARG_WITH(wayland-include, [AS_HELP_STRING([--with-wayland-include],
+      [specify directory for the wayland include files])])
+
+  if test "x$NEEDS_LIB_WAYLAND" = xfalse; then
+    if (test "x${with_wayland}" != x && test "x${with_wayland}" != xno) || \
+        (test "x${with_wayland_include}" != x && test "x${with_wayland_include}" != xno); then
+      AC_MSG_WARN([[wayland not used, so --with-wayland[-*] is ignored]])
+    fi
+    WAYLAND_CFLAGS=
+    WAYLAND_LIBS=
+  else
+    WAYLAND_FOUND=no
+
+    if test "x${with_wayland}" = xno || test "x${with_wayland_include}" = xno; then
+      AC_MSG_ERROR([It is not possible to disable the use of wayland. Remove the --without-wayland option.])
+    fi
+
+    if test "x${with_wayland}" != x; then
+      AC_MSG_CHECKING([for wayland headers])
+      if test -s "${with_wayland}/include/wayland-client.h"; then
+        WAYLAND_CFLAGS="-I${with_wayland}/include"
+        WAYLAND_LIBS="-L${with_wayland}/lib -lwayland-client"
+
+        WAYLAND_FOUND=yes
+        AC_MSG_RESULT([$WAYLAND_FOUND])
+      else
+        AC_MSG_ERROR([Can't find 'include/wayland-client.h' under ${with_wayland} given with the --with-wayland option.])
+      fi
+    fi
+    if test "x${with_wayland_include}" != x; then
+      AC_MSG_CHECKING([for wayland headers])
+      if test -s "${with_wayland_include}/wayland-client.h"; then
+        WAYLAND_CFLAGS="-I${with_wayland_include}"
+        WAYLAND_FOUND=yes
+        AC_MSG_RESULT([$WAYLAND_FOUND])
+      else
+        AC_MSG_ERROR([Can't find 'wayland-client.h' under ${with_wayland_include} given with the --with-wayland-include option.])
+      fi
+    fi
+    if test "x$WAYLAND_FOUND" = xno; then
+      # Are the wayland headers installed in the default /usr/include location?
+      AC_CHECK_HEADERS([wayland-client.h], [
+          WAYLAND_FOUND=yes
+          WAYLAND_CFLAGS=
+          WAYLAND_LIBS="-lwayland-client"
+          DEFAULT_WAYLAND=yes
+      ])
+    fi
+    if test "x$WAYLAND_FOUND" = xno; then
+      HELP_MSG_MISSING_DEPENDENCY([wayland])
+      AC_MSG_ERROR([Could not find wayland! $HELP_MSG ])
+    fi
+  fi
+
+  AC_SUBST(WAYLAND_CFLAGS)
+  AC_SUBST(WAYLAND_LIBS)
+])

make/autoconf/libraries.m4

@@ -35,20 +35,27 @@ m4_include([lib-std.m4])
 m4_include([lib-x11.m4])
 
 m4_include([lib-tests.m4])
+m4_include([lib-wayland.m4])
 
 ################################################################################
 # Determine which libraries are needed for this configuration
 ################################################################################
 AC_DEFUN_ONCE([LIB_DETERMINE_DEPENDENCIES],
 [
-  # Check if X11 is needed
+  # Check if X11 and wayland is needed
   if test "x$OPENJDK_TARGET_OS" = xwindows || test "x$OPENJDK_TARGET_OS" = xmacosx; then
-    # No X11 support on windows or macosx
+    # No X11 and wayland support on windows or macosx
     NEEDS_LIB_X11=false
+    NEEDS_LIB_WAYLAND=false
+  elif test "x$ENABLE_HEADLESS_ONLY" = xtrue; then
+    # No X11 support needed when building headless only
+    NEEDS_LIB_X11=false
+    NEEDS_LIB_WAYLAND=false
   else
-    # All other instances need X11, even if building headless only, libawt still
+    # All other instances need X11 and wayland, even if building headless only, libawt still
     # needs X11 headers.
     NEEDS_LIB_X11=true
+    NEEDS_LIB_WAYLAND=true
   fi
 
   # Check if fontconfig is needed
@@ -104,6 +111,7 @@ AC_DEFUN_ONCE([LIB_SETUP_LIBRARIES],
   LIB_SETUP_HSDIS
   LIB_SETUP_LIBFFI
   LIB_SETUP_MISC_LIBS
+  LIB_SETUP_WAYLAND
   LIB_SETUP_X11
 
   LIB_TESTS_SETUP_GTEST

make/autoconf/spec.gmk.in

@@ -453,7 +453,8 @@ endif
 # Necessary additional compiler flags to compile X11
 X_CFLAGS:=@X_CFLAGS@
 X_LIBS:=@X_LIBS@
-
+WAYLAND_CFLAGS:=@WAYLAND_CFLAGS@
+WAYLAND_LIBS:=@WAYLAND_LIBS@
 # The lowest required version of macosx
 MACOSX_VERSION_MIN=@MACOSX_VERSION_MIN@
 # The highest allowed version of macosx

make/modules/java.desktop/lib/Awt2dLibraries.gmk

@@ -191,7 +191,7 @@ ifeq ($(call isTargetOs, windows macosx), false)
         common/font \
         #
 
-    LIBAWT_XAWT_EXCLUDES := medialib debug
+    LIBAWT_XAWT_EXCLUDES := medialib debug wl
 
     LIBAWT_XAWT_EXTRA_HEADER_DIRS := \
         $(LIBAWT_DEFAULT_HEADER_DIRS) \
@@ -263,6 +263,83 @@ endif
 
 ################################################################################
 
+ifeq ($(call isTargetOs, windows macosx), false)
+  ifeq ($(ENABLE_HEADLESS_ONLY), false)
+
+    LIBAWT_WLAWT_EXTRA_SRC := \
+        common/awt \
+        common/java2d \
+        common/font \
+        #
+
+    LIBAWT_WLAWT_EXCLUDES := medialib debug opengl x11
+    LIBAWT_WLAWT_EXCLUDE_FILES := common/awt/X11Color.c common/awt/awt_Font.c
+
+    LIBAWT_WLAWT_EXTRA_HEADER_DIRS := \
+        $(LIBAWT_DEFAULT_HEADER_DIRS) \
+        libawt_wlawt/awt \
+        include \
+        common/awt/debug \
+        common/awt/systemscale \
+        common/font \
+        common/java2d/wl \
+        #
+
+    # Enable 'wakefield' extension for java.awt.Robot support
+    WAKEFIELD_ROBOT_CFLAGS=-DWAKEFIELD_ROBOT
+
+    LIBAWT_WLAWT_CFLAGS += -DWLAWT \
+        $(WAKEFIELD_ROBOT_CFLAGS) \
+        $(FONTCONFIG_CFLAGS) \
+        $(CUPS_CFLAGS)
+
+    LIBAWT_WLAWT_LIBS := $(LIBM) -lawt $(WAYLAND_LIBS) $(LIBDL) -ljava -ljvm -lrt
+
+    ifeq ($(call isTargetOs, linux), true)
+      LIBAWT_WLAWT_LIBS += -lpthread
+    endif
+
+    ifeq ($(TOOLCHAIN_TYPE), gcc)
+      # Turn off all warnings for the following files since they contain warnings
+      # that cannot be turned of individually.
+      # redefining a macro
+      BUILD_LIBAWT_WLAWT_awt_Font.c_CFLAGS := -w
+      # initializing a declared 'extern'
+      BUILD_LIBAWT_WLAWT_debug_mem.c_CFLAGS := -w
+    endif
+
+    $(eval $(call SetupJdkLibrary, BUILD_LIBAWT_WLAWT, \
+        NAME := awt_wlawt, \
+        EXCLUDE_FILES := $(LIBAWT_WLAWT_EXCLUDE_FILES), \
+        EXTRA_SRC := $(LIBAWT_WLAWT_EXTRA_SRC), \
+        EXTRA_HEADER_DIRS := $(LIBAWT_WLAWT_EXTRA_HEADER_DIRS), \
+        EXCLUDES := $(LIBAWT_WLAWT_EXCLUDES), \
+        OPTIMIZATION := LOW, \
+        CFLAGS := $(CFLAGS_JDKLIB) $(LIBAWT_WLAWT_CFLAGS), \
+        WARNINGS_AS_ERRORS_xlc := false, \
+        DISABLED_WARNINGS_gcc := type-limits pointer-to-int-cast \
+            unused-result maybe-uninitialized format \
+            format-security int-to-pointer-cast parentheses \
+            implicit-fallthrough undef unused-function, \
+        DISABLED_WARNINGS_clang := parentheses format undef \
+            logical-op-parentheses format-nonliteral int-conversion, \
+        LDFLAGS := $(LDFLAGS_JDKLIB) \
+            $(call SET_SHARED_LIBRARY_ORIGIN) \
+            -L$(INSTALL_LIBRARIES_HERE), \
+        LIBS :=  $(LIBAWT_WLAWT_LIBS), \
+    ))
+
+    $(BUILD_LIBAWT_WLAWT): $(call FindLib, java.base, java)
+
+    $(BUILD_LIBAWT_WLAWT): $(BUILD_LIBAWT)
+
+    TARGETS += $(BUILD_LIBAWT_WLAWT)
+
+  endif
+endif
+
+################################################################################
+
 # The fast floor code loses precision.
 LCMS_CFLAGS=-DCMS_DONT_USE_FAST_FLOOR
 
@@ -493,13 +570,9 @@ ifneq ($(filter $(TOOLCHAIN_TYPE), gcc clang), )
 endif
 
 ifeq ($(call isTargetOs, windows), true)
-  LIBFONTMANAGER_EXCLUDE_FILES += X11FontScaler.c \
-      X11TextRenderer.c
   LIBFONTMANAGER_OPTIMIZATION := HIGHEST
 else ifeq ($(call isTargetOs, macosx), true)
-  LIBFONTMANAGER_EXCLUDE_FILES += X11FontScaler.c \
-      X11TextRenderer.c \
-      fontpath.c \
+  LIBFONTMANAGER_EXCLUDE_FILES += fontpath.c \
       lcdglyph.c
 else
   LIBFONTMANAGER_EXCLUDE_FILES += fontpath.c \
@@ -524,7 +597,7 @@ $(eval $(call SetupJdkLibrary, BUILD_LIBFONTMANAGER, \
     EXTRA_HEADER_DIRS := $(LIBFONTMANAGER_EXTRA_HEADER_DIRS), \
     EXTRA_SRC := $(LIBFONTMANAGER_EXTRA_SRC), \
     WARNINGS_AS_ERRORS_xlc := false, \
-    DISABLED_WARNINGS_gcc := $(HARFBUZZ_DISABLED_WARNINGS_gcc), \
+    DISABLED_WARNINGS_gcc := $(HARFBUZZ_DISABLED_WARNINGS_gcc) unused-result, \
     DISABLED_WARNINGS_CXX_gcc := $(HARFBUZZ_DISABLED_WARNINGS_CXX_gcc), \
     DISABLED_WARNINGS_clang := $(HARFBUZZ_DISABLED_WARNINGS_clang), \
     DISABLED_WARNINGS_microsoft := $(HARFBUZZ_DISABLED_WARNINGS_microsoft), \
@@ -554,6 +627,51 @@ TARGETS += $(BUILD_LIBFONTMANAGER)
 
 ################################################################################
 
+ifeq ($(call isTargetOs, windows macosx), false)
+  ifeq ($(ENABLE_HEADLESS_ONLY), false)
+
+    LIBFONTMANAGER_XAWT_EXCLUDE_FILES := $(LIBFONTMANAGER_EXCLUDE_FILES)
+    LIBFONTMANAGER_XAWT_CFLAGS := $(LIBFONTMANAGER_CFLAGS)
+    LIBFONTMANAGER_XAWT_OPTIMIZATION := $(LIBFONTMANAGER_OPTIMIZATION)
+    LIBFONTMANAGER_XAWT_EXTRA_HEADER_DIRS := $(LIBFONTMANAGER_EXTRA_HEADER_DIRS) \
+        libfontmanager
+    LIBFONTMANAGER_XAWT_EXTRA_SRC :=
+
+    $(eval $(call SetupJdkLibrary, BUILD_LIBFONTMANAGER_XAWT, \
+        NAME := fontmanager_xawt, \
+        EXCLUDE_FILES := $(LIBFONTMANAGER_XAWT_EXCLUDE_FILES) \
+            AccelGlyphCache.c, \
+        TOOLCHAIN := TOOLCHAIN_LINK_CXX, \
+        CFLAGS := $(CFLAGS_JDKLIB) $(LIBFONTMANAGER_XAWT_CFLAGS), \
+        CXXFLAGS := $(CXXFLAGS_JDKLIB) $(LIBFONTMANAGER_XAWT_CFLAGS), \
+        OPTIMIZATION := $(LIBFONTMANAGER_XAWT_OPTIMIZATION), \
+        CFLAGS_windows = -DCC_NOEX, \
+        EXTRA_HEADER_DIRS := $(LIBFONTMANAGER_XAWT_EXTRA_HEADER_DIRS), \
+        EXTRA_SRC := $(LIBFONTMANAGER_XAWT_EXTRA_SRC), \
+        WARNINGS_AS_ERRORS_xlc := false, \
+        DISABLED_WARNINGS_gcc := $(HARFBUZZ_DISABLED_WARNINGS_gcc), \
+        DISABLED_WARNINGS_CXX_gcc := $(HARFBUZZ_DISABLED_WARNINGS_CXX_gcc), \
+        DISABLED_WARNINGS_clang := $(HARFBUZZ_DISABLED_WARNINGS_clang), \
+        DISABLED_WARNINGS_microsoft := $(HARFBUZZ_DISABLED_WARNINGS_microsoft), \
+        LDFLAGS := $(subst -Xlinker -z -Xlinker defs,, \
+            $(subst -Wl$(COMMA)-z$(COMMA)defs,,$(LDFLAGS_JDKLIB))) $(LDFLAGS_CXX_JDK) \
+            $(call SET_SHARED_LIBRARY_ORIGIN), \
+        LDFLAGS_unix := -L$(INSTALL_LIBRARIES_HERE), \
+        LDFLAGS_aix := -Wl$(COMMA)-berok, \
+        LIBS := $(BUILD_LIBFONTMANAGER_FONTLIB), \
+        LIBS_unix := -lfontmanager -lawt -ljava -ljvm $(LIBM) $(LIBCXX), \
+    ))
+
+    $(BUILD_LIBFONTMANAGER_XAWT): $(BUILD_LIBFONTMANAGER)
+    $(BUILD_LIBFONTMANAGER_XAWT): $(BUILD_LIBAWT_XAWT)
+
+    TARGETS += $(BUILD_LIBFONTMANAGER_XAWT)
+
+  endif
+endif
+
+################################################################################
+
 ifeq ($(call isTargetOs, windows), true)
 
   LIBJAWT_CFLAGS := -EHsc -DUNICODE -D_UNICODE

src/java.desktop/share/native/common/font/sunfontids.h

@@ -86,6 +86,7 @@ typedef struct FontManagerNativeIDs {
    but we need access method to use it from separate rasterizer lib */
 extern FontManagerNativeIDs sunFontIDs;
 JNIEXPORT FontManagerNativeIDs getSunFontIDs(JNIEnv* env);
+JNIEXPORT const FontManagerNativeIDs* getSunFontIDsPtr(JNIEnv* env);
 
 #ifdef  __cplusplus
 }

src/java.desktop/share/native/libfontmanager/DrawGlyphList.c

@@ -50,8 +50,8 @@
 #define FLOOR_ASSIGN(l, r)\
  if ((r)<0) (l) = ((int)floor(r)); else (l) = ((int)(r))
 
-GlyphBlitVector* setupBlitVector(JNIEnv *env, jobject glyphlist,
-                                 jint fromGlyph, jint toGlyph) {
+JNIEXPORT GlyphBlitVector* setupBlitVector(JNIEnv *env, jobject glyphlist,
+                                           jint fromGlyph, jint toGlyph) {
 
     int g;
     size_t bytesNeeded;
@@ -140,7 +140,7 @@ GlyphBlitVector* setupBlitVector(JNIEnv *env, jobject glyphlist,
     return gbv;
 }
 
-jint RefineBounds(GlyphBlitVector *gbv, SurfaceDataBounds *bounds) {
+JNIEXPORT jint RefineBounds(GlyphBlitVector *gbv, SurfaceDataBounds *bounds) {
     int index;
     jint dx1, dy1, dx2, dy2;
     ImageRef glyphImage;
@@ -487,8 +487,8 @@ Java_sun_java2d_loops_DrawGlyphListLCD_DrawGlyphListLCD
  *  rendered fractional metrics, there's typically more space between the
  *  glyphs. Perhaps disabling X-axis grid-fitting will help with that.
  */
-GlyphBlitVector* setupLCDBlitVector(JNIEnv *env, jobject glyphlist,
-                                    jint fromGlyph, jint toGlyph) {
+JNIEXPORT GlyphBlitVector* setupLCDBlitVector(JNIEnv *env, jobject glyphlist,
+                                              jint fromGlyph, jint toGlyph) {
 
     int g;
     size_t bytesNeeded;

src/java.desktop/share/native/libfontmanager/glyphblitting.h

@@ -39,11 +39,11 @@ typedef struct {
   ImageRef *glyphs;
 } GlyphBlitVector;
 
-extern jint RefineBounds(GlyphBlitVector *gbv, SurfaceDataBounds *bounds);
-extern GlyphBlitVector* setupBlitVector(JNIEnv *env, jobject glyphlist,
-                                        jint fromGlyph, jint toGlyph);
-extern GlyphBlitVector* setupLCDBlitVector(JNIEnv *env, jobject glyphlist,
+JNIEXPORT jint RefineBounds(GlyphBlitVector *gbv, SurfaceDataBounds *bounds);
+JNIEXPORT GlyphBlitVector* setupBlitVector(JNIEnv *env, jobject glyphlist,
                                            jint fromGlyph, jint toGlyph);
+JNIEXPORT GlyphBlitVector* setupLCDBlitVector(JNIEnv *env, jobject glyphlist,
+                                              jint fromGlyph, jint toGlyph);
 
 #ifdef  __cplusplus
 }

src/java.desktop/share/native/libfontmanager/sunFont.c

@@ -207,6 +207,12 @@ JNIEXPORT FontManagerNativeIDs getSunFontIDs(JNIEnv *env) {
     return sunFontIDs;
 }
 
+JNIEXPORT const FontManagerNativeIDs* getSunFontIDsPtr(JNIEnv* env) {
+
+    initFontIDs(env);
+    return &sunFontIDs;
+}
+
 /*
  * Class:     sun_font_StrikeCache
  * Method:    freeIntPointer

src/java.desktop/share/native/libwakefield/CMakeLists.txt

@@ -0,0 +1,97 @@
+#
+# Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+cmake_minimum_required(VERSION 3.16)
+project(wakefield C)
+
+set(CMAKE_C_STANDARD 11)
+
+set(CMAKE_INSTALL_PREFIX ${CMAKE_CURRENT_SOURCE_DIR})
+
+find_program(WAYLAND_SCANNER wayland-scanner)
+if (NOT WAYLAND_SCANNER)
+    message(FATAL_ERROR "wayland-scanner not found")
+endif ()
+
+add_custom_command(
+        OUTPUT wakefield-server-protocol.h
+        COMMAND ${WAYLAND_SCANNER} server-header ${CMAKE_CURRENT_SOURCE_DIR}/protocol/wakefield.xml wakefield-server-protocol.h
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/protocol/wakefield.xml
+        VERBATIM)
+
+add_custom_command(
+        OUTPUT wakefield-server-protocol.c
+        COMMAND ${WAYLAND_SCANNER} private-code ${CMAKE_CURRENT_SOURCE_DIR}/protocol/wakefield.xml wakefield-server-protocol.c
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/protocol/wakefield.xml
+        VERBATIM)
+
+find_path(
+        WESTON_INCLUDES
+        weston/weston.h
+        /usr/include /usr/local/include)
+
+if (NOT WESTON_INCLUDES)
+    message(FATAL_ERROR "weston/weston.h not found")
+endif ()
+
+find_path(
+        LIBWESTON_INCLUDES
+        libweston/libweston.h
+        /usr/include /usr/local/include
+        PATH_SUFFIXES libweston-9)
+
+if (NOT LIBWESTON_INCLUDES)
+    message(FATAL_ERROR "libweston/libweston.h not found")
+endif ()
+
+find_path(
+        PIXMAN_INCLUDES
+        pixman.h
+        /usr/include /usr/local/include
+        PATH_SUFFIXES pixman-1)
+
+if (NOT PIXMAN_INCLUDES)
+    message(FATAL_ERROR "pixman.h not found")
+endif ()
+
+add_library(wakefield SHARED src/wakefield.c wakefield-server-protocol.c wakefield-server-protocol.h)
+target_include_directories(wakefield PUBLIC
+        ${WESTON_INCLUDES} ${LIBWESTON_INCLUDES} ${PIXMAN_INCLUDES}
+        ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
+
+install(TARGETS wakefield DESTINATION .)
+
+add_custom_command(
+        OUTPUT wakefield-client-protocol.h
+        COMMAND ${WAYLAND_SCANNER} client-header ${CMAKE_CURRENT_SOURCE_DIR}/protocol/wakefield.xml wakefield-client-protocol.h
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/protocol/wakefield.xml
+        VERBATIM)
+
+add_custom_command(
+        OUTPUT wakefield-client-protocol.c
+        COMMAND ${WAYLAND_SCANNER} code ${CMAKE_CURRENT_SOURCE_DIR}/protocol/wakefield.xml wakefield-client-protocol.c
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/protocol/wakefield.xml
+        VERBATIM)
+
+add_custom_target(client ALL DEPENDS wakefield-client-protocol.h wakefield-client-protocol.c)

src/java.desktop/share/native/libwakefield/README.md

@@ -0,0 +1,43 @@
+# Wakefield Protocol
+This is a [Weston](https://github.com/wayland-project/weston) protocol extension
+created to satisfy the requirements of the
+[Wakefield](https://openjdk.java.net/projects/wakefield/) project *testing*.
+
+## Rationale
+Many of `java.awt.Robot` capabilities contradict the basic principles of
+[Wayland](https://openjdk.java.net/projects/wakefield/). The examples include
+obtaining the color of a pixel at specified coordinates by automated tests.
+This extension aims to help in implementation of those capabilities for the use
+in test environment *only*.
+
+## Prerequisites
+On Ubuntu 21.04 (in addition to the usual C development environment):
+```bash
+$ sudo apt install cmake libwayland-dev wayland-protocols \
+   libweston-9-0 libweston-9-dev weston libpixman-1-dev libpixman-1-0
+```
+
+## Build
+
+```bash
+$ mkdir build && cd build
+$ cmake .../src/java.desktop/share/native/libwakefield/
+$ make
+```
+This should build `libwakefield.so` in the current (build) directory.
+
+## Smoke test
+
+```bash
+$ PWD=`pwd` && \
+  weston --socket=wayland-test --width=800 --height=600 --use-pixman --socket=wayland-42 \
+    --modules="$PWD/libwakefield.so"
+```
+This will create a new Weston compositor instance with the Wayland socket
+named `wayland-42`.
+Now you can verify that a new global has been published by running this command:
+```bash
+$ WAYLAND_DISPLAY=wayland-42 weston-info | grep wakefield
+interface: 'wakefield', version: 1, name: 21
+```
+

src/java.desktop/share/native/libwakefield/protocol/wakefield.xml

@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<protocol name="wakefield">
+    <copyright>
+         Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+         Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+         DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+
+         This code is free software; you can redistribute it and/or modify it
+         under the terms of the GNU General Public License version 2 only, as
+         published by the Free Software Foundation.
+
+         This code is distributed in the hope that it will be useful, but WITHOUT
+         ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+         FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+         version 2 for more details (a copy is included in the LICENSE file that
+         accompanied this code).
+
+         You should have received a copy of the GNU General Public License version
+         2 along with this work; if not, write to the Free Software Foundation,
+         Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+
+         Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+         or visit www.oracle.com if you need additional information or have any
+         questions.
+    </copyright>
+
+    <interface name="wakefield" version="1">
+        <description summary="provides capabilities necessary to for java.awt.Robot and such"></description>
+
+        <request name="destroy" type="destructor">
+        </request>
+
+        <request name="move_surface">
+            <description summary="facilitates implementation of Frame.setLocation()">
+                This instructs the window manager to position the given wl_surface
+                at the given absolute coordinates. The subsequent get_surface_location
+                request will return these coordinates unless the surface was moved by
+                a third party.
+            </description>
+            <arg name="surface" type="object" interface="wl_surface"/>
+            <arg name="x" type="int"/>
+            <arg name="y" type="int"/>
+        </request>
+
+        <request name="get_surface_location">
+            <description summary="facilitates implementation of Frame.getLocation()">
+                This requests a surface_location event for the given surface.
+            </description>
+            <arg name="surface" type="object" interface="wl_surface"/>
+        </request>
+
+        <event name="surface_location">
+            <description summary="facilitates implementation of Frame.getLocation()">
+                This event reveals the absolute coordinates of the surface if error_code is zero.
+                If error_code is non-zero, (x, y) are undefined.
+                The surface argument always correspond to that of the get_surface_location request.
+            </description>
+            <arg name="surface" type="object" interface="wl_surface"/>
+            <arg name="x" type="int"/>
+            <arg name="y" type="int"/>
+            <arg name="error_code" type="uint" enum="error"/>
+        </event>
+
+        <request name="get_pixel_color">
+            <description summary="facilitates implementation of Robot.getPixelColor()">
+                This requests a pixel_color event at the given absolute coordinates.
+            </description>
+            <arg name="x" type="int"/>
+            <arg name="y" type="int"/>
+        </request>
+
+        <event name="pixel_color">
+            <description summary="facilitates implementation of Robot.getPixelColor()">
+                This event shows the color (24-bit, format r8g8b8) of the pixel with the given
+                absolute coordinates.
+                The (x, y) arguments correspond to that of the get_pixel_color request.
+                If error_code is non-zero, the rgb argument is undefined and the error_code argument
+                contains a code from the error enum.
+            </description>
+            <arg name="x" type="int"/>
+            <arg name="y" type="int"/>
+            <arg name="rgb" type="uint"/>
+            <arg name="error_code" type="uint" enum="error"/>
+        </event>
+
+        <enum name="error">
+            <entry name="no_error" value="0" summary="error code 0 reserved for the absence of error"/>
+            <entry name="invalid_coordinates" value="1" summary="supplied absolute coordinates point
+             outside of any output"/>
+            <entry name="out_of_memory" value="2" summary="the request could not be fulfilled due to memory allocation error"/>
+            <entry name="internal" value="3" summary="a generic error code for internal errors"/>
+            <entry name="format" value="4" summary="(temporary?) color cannot be converted to RGB format"/>
+        </enum>
+
+        <request name="capture_create">
+            <arg name="buffer" type="object" interface="wl_buffer" summary="shall be an instance by the wl_shm factory"/>
+            <arg name="x" type="int"/>
+            <arg name="y" type="int"/>
+            <!--
+            <arg name="capture_pointer" type="int" summary="0 to exclude the mouse pointer surface from the capture"/>
+            -->
+        </request>
+
+        <event name="capture_ready">
+            <arg name="buffer" type="object" interface="wl_buffer"/>
+            <arg name="error_code" type="uint" enum="error"/>
+        </event>
+    </interface>
+
+</protocol>

src/java.desktop/share/native/libwakefield/src/wakefield.c

@@ -0,0 +1,546 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <weston/weston.h>
+#include <libweston/weston-log.h>
+
+#include <pixman.h>
+#include <assert.h>
+#include <string.h>
+
+#include "wakefield-server-protocol.h"
+
+#ifndef container_of
+#define container_of(ptr, type, member) ({                              \
+        const __typeof__( ((type *)0)->member ) *__mptr = (ptr);        \
+        (type *)( (char *)__mptr - offsetof(type,member) );})
+#endif
+
+struct wakefield {
+    struct weston_compositor *compositor;
+    struct wl_listener destroy_listener;
+
+    struct weston_log_scope *log;
+};
+
+static struct weston_output*
+get_output_for_point(struct wakefield* wakefield, int32_t x, int32_t y)
+{
+    struct weston_output *o;
+    wl_list_for_each(o, &wakefield->compositor->output_list, link) {
+        if (o->destroying)
+            continue;
+
+        if (pixman_region32_contains_point(&o->region, x, y, NULL)) {
+            return o;
+        }
+    }
+
+    return NULL;
+}
+
+static void
+wakefield_get_pixel_color(struct wl_client *client,
+                          struct wl_resource *resource,
+                          int32_t x,
+                          int32_t y)
+{
+    struct wakefield *wakefield = wl_resource_get_user_data(resource);
+    struct weston_compositor *compositor = wakefield->compositor;
+
+    weston_log_scope_printf(wakefield->log, "WAKEFIELD: get_pixel_color at (%d, %d)\n", x, y);
+
+    const unsigned int byte_per_pixel = (PIXMAN_FORMAT_BPP(compositor->read_format) / 8);
+    uint32_t pixel = 0;
+    if (byte_per_pixel > sizeof(pixel)) {
+        weston_log_scope_printf(wakefield->log,
+                                "WAKEFIELD: compositor pixel format (%d) exceeds allocated storage (%d > %ld)\n",
+                                compositor->read_format,
+                                byte_per_pixel,
+                                sizeof(pixel));
+        wakefield_send_pixel_color(resource, x, y, 0, WAKEFIELD_ERROR_FORMAT);
+        return;
+    }
+
+    struct weston_output *output = get_output_for_point(wakefield, x, y);
+    if (output == NULL) {
+        weston_log_scope_printf(wakefield->log,
+                                "WAKEFIELD: pixel location (%d, %d) doesn't map to any output\n", x, y);
+        wakefield_send_pixel_color(resource, x, y, 0, WAKEFIELD_ERROR_INVALID_COORDINATES);
+        return;
+    }
+    
+    const int output_x = x - output->x;
+    const int output_y = y - output->y;
+    weston_log_scope_printf(wakefield->log,
+                            "WAKEFIELD: reading pixel color at (%d, %d) of '%s'\n",
+                            output_x, output_y, output->name);
+    compositor->renderer->read_pixels(output,
+                                      compositor->read_format, &pixel,
+                                      output_x, output_y, 1, 1);
+
+    uint32_t rgb = 0;
+    switch (compositor->read_format) {
+        case PIXMAN_a8r8g8b8:
+        case PIXMAN_x8r8g8b8:
+        case PIXMAN_r8g8b8:
+            rgb = pixel & 0x00ffffffu;
+            break;
+
+        default:
+            weston_log_scope_printf(wakefield->log,
+                                    "WAKEFIELD: compositor pixel format %d (see pixman.h) not supported\n",
+                                    compositor->read_format);
+            wakefield_send_pixel_color(resource, x, y, 0, WAKEFIELD_ERROR_FORMAT);
+            return;
+    }
+    weston_log_scope_printf(wakefield->log, "WAKEFIELD: color is 0x%08x\n", rgb);
+
+    wakefield_send_pixel_color(resource, x, y, rgb, WAKEFIELD_ERROR_NO_ERROR);
+}
+
+static void
+wakefield_get_surface_location(struct wl_client *client,
+                               struct wl_resource *resource,
+                               struct wl_resource *surface_resource)
+{
+    // See also weston-test.c`move_surface() and the corresponding protocol
+
+    struct wakefield *wakefield = wl_resource_get_user_data(resource);
+    struct weston_surface *surface = wl_resource_get_user_data(surface_resource);
+    struct weston_view *view = container_of(surface->views.next, struct weston_view, surface_link);
+
+    if (!view) {
+        weston_log_scope_printf(wakefield->log, "WAKEFIELD: get_location error\n");
+        wakefield_send_surface_location(resource, surface_resource, 0, 0,
+                                        WAKEFIELD_ERROR_INTERNAL);
+        return;
+    }
+
+    float fx;
+    float fy;
+    weston_view_to_global_float(view, 0, 0, &fx, &fy);
+    const int32_t x = (int32_t)fx;
+    const int32_t y = (int32_t)fy;
+    weston_log_scope_printf(wakefield->log, "WAKEFIELD: get_location: %d, %d\n", x, y);
+
+    wakefield_send_surface_location(resource, surface_resource, x, y,
+                                    WAKEFIELD_ERROR_NO_ERROR);
+}
+
+static void
+wakefield_move_surface(struct wl_client *client,
+                       struct wl_resource *resource,
+                       struct wl_resource *surface_resource,
+                       int32_t x,
+                       int32_t y)
+{
+    struct wakefield *wakefield = wl_resource_get_user_data(resource);
+    struct weston_surface *surface = wl_resource_get_user_data(surface_resource);
+    struct weston_view *view = container_of(surface->views.next, struct weston_view, surface_link);
+
+    if (!view) {
+        weston_log_scope_printf(wakefield->log, "WAKEFIELD: move_surface error\n");
+        return;
+    }
+
+    weston_view_set_position(view, (float)x, (float)y);
+    weston_view_update_transform(view);
+
+    weston_log_scope_printf(wakefield->log, "WAKEFIELD: move_surface to (%d, %d)\n", x, y);
+}
+
+static pixman_format_code_t
+wl_shm_format_to_pixman(uint32_t wl_shm_format)
+{
+    pixman_format_code_t rc;
+
+    switch (wl_shm_format) {
+        case WL_SHM_FORMAT_ARGB8888:
+            rc = PIXMAN_a8r8g8b8;
+            break;
+        case WL_SHM_FORMAT_XRGB8888:
+            rc = PIXMAN_x8r8g8b8;
+            break;
+        default:
+            assert(false);
+    }
+
+    return rc;
+}
+
+/**
+ * Returns the number of pixels in the given non-empty region.
+ */
+static uint64_t
+size_in_pixels(pixman_region32_t *region)
+{
+    const pixman_box32_t * const e = pixman_region32_extents(region);
+    assert (e->x2 >= e->x1);
+    assert (e->y2 >= e->y1);
+
+    return ((uint64_t)(e->x2 - e->x1))*(e->y2 - e->y1);
+}
+
+/**
+ * Get the number of pixels of the largest portion that the given region occupies on
+ * any of the compositor's outputs.
+ *
+ * @param fits_entirely (OUT) set to true iff the entire region fits as a whole on just one output
+ * @return largest area size in pixels (could be zero).
+ */
+static uint64_t
+get_largest_area_in_one_output(struct weston_compositor *compositor, pixman_region32_t *region, bool *fits_entirely)
+{
+    uint64_t area = 0; // in pixels
+    *fits_entirely = false;
+
+    pixman_region32_t region_in_output;
+    pixman_region32_init(&region_in_output);
+
+    struct weston_output *output;
+    wl_list_for_each(output, &compositor->output_list, link) {
+        if (output->destroying)
+            continue;
+
+        pixman_region32_intersect(&region_in_output, region, &output->region);
+        if (pixman_region32_not_empty(&region_in_output)) {
+            const uint64_t this_area = size_in_pixels(&region_in_output);
+            if (this_area > area) {
+                area = this_area;
+            }
+            if (pixman_region32_equal(&region_in_output, region)) {
+                *fits_entirely = true;
+                break;
+            }
+        }
+    }
+
+    pixman_region32_fini(&region_in_output);
+
+    return area;
+}
+
+/**
+ * Sets every pixel in the given buffer to 0.
+ */
+static void
+clear_buffer(struct wl_shm_buffer *buffer)
+{
+    const int32_t  height           = wl_shm_buffer_get_height(buffer);
+    const size_t   stride           = wl_shm_buffer_get_stride(buffer);
+    const size_t   buffer_byte_size = height*stride;
+
+    wl_shm_buffer_begin_access(buffer);
+    {
+        uint32_t *data = wl_shm_buffer_get_data(buffer);
+        memset(data, 0, buffer_byte_size);
+    }
+    wl_shm_buffer_end_access(buffer);
+}
+
+/**
+ * Copies 4-byte pixels from the given array to the given buffer
+ * at the given offset into the buffer.
+ *
+ * @param buffer   target buffer (format is assumed to be 4 byte per pixel)
+ * @param data     array of 4-byte pixels of size (width*height)
+ * @param target_x horizontal coordinate of the top-left corner in the buffer
+ *                 where the given data should be placed
+ * @param target_y vertical coordinate of the top-left corner in the buffer
+ *                 where the given data should be placed
+ * @param width    the source image width in pixels
+ * @param height   the source image height in pixels
+ */
+static void
+copy_pixels_to_shm_buffer(struct wl_shm_buffer *buffer, uint32_t *data,
+                          int32_t target_x, int32_t target_y,
+                          int32_t width, int32_t height)
+{
+    assert (target_x >= 0 && target_y >= 0);
+    assert (data);
+
+    const int32_t buffer_width = wl_shm_buffer_get_width(buffer);
+
+    wl_shm_buffer_begin_access(buffer);
+    {
+        uint32_t * const buffer_data = wl_shm_buffer_get_data(buffer);
+        assert (buffer_data);
+
+        for (int32_t y = 0; y < height; y++) {
+            const uint32_t * const src_line = &data[y*width];
+            uint32_t * const       dst_line = &buffer_data[(target_y + y)*buffer_width];
+            for (int32_t x = 0; x < width; x++) {
+                dst_line[target_x + x] = src_line[x];
+            }
+        }
+    }
+    wl_shm_buffer_end_access(buffer);
+}
+
+/**
+ * Verifies that the given buffer format is supported and sends the "capture ready" event
+ * with the appropriate error code if it wasn't.
+ */
+static bool
+check_buffer_format_supported(struct wakefield *wakefield, struct wl_resource *resource,
+                              struct wl_resource *buffer_resource, uint32_t buffer_format)
+{
+    if (buffer_format != WL_SHM_FORMAT_ARGB8888
+        && buffer_format != WL_SHM_FORMAT_XRGB8888) {
+        weston_log_scope_printf(wakefield->log,
+                                "WAKEFIELD: buffer for image capture has unsupported format %d, "
+                                "check codes in enum 'format' in wayland.xml\n",
+                                buffer_format);
+        wakefield_send_capture_ready(resource, buffer_resource, WAKEFIELD_ERROR_FORMAT);
+        return false;
+    }
+
+    return true;
+}
+
+/**
+ * Verifies that the given buffer type is shm and sends the "capture ready" event
+ * with the appropriate error code if it wasn't.
+ */
+static bool
+check_buffer_type_supported(struct wakefield *wakefield, struct wl_resource *resource,
+                            struct wl_resource *buffer_resource)
+{
+    struct wl_shm_buffer *buffer = wl_shm_buffer_get(buffer_resource);
+
+    if (!buffer) {
+        weston_log_scope_printf(wakefield->log, "WAKEFIELD: buffer for image capture not from wl_shm\n");
+        wakefield_send_capture_ready(resource, buffer_resource, WAKEFIELD_ERROR_INTERNAL);
+        return false;
+    }
+
+    return true;
+}
+
+/**
+ * Verifies that the given capture area is not empty and sends the successful "capture ready" event
+ * if it was.
+ */
+static bool
+capture_is_empty(struct wakefield *wakefield, struct wl_resource *resource,
+                    struct wl_resource *buffer_resource, uint64_t largest_capture_area)
+{
+    if (largest_capture_area == 0) {
+        // All outputs might've just disappeared
+        weston_log_scope_printf(wakefield->log,
+                                "WAKEFIELD: captured area size on all outputs is zero.\n");
+        wakefield_send_capture_ready(resource, buffer_resource, WAKEFIELD_ERROR_NO_ERROR);
+        return true;
+    }
+
+    return false;
+}
+
+static void
+wakefield_capture_create(struct wl_client *client,
+                         struct wl_resource *resource,
+                         struct wl_resource *buffer_resource,
+                         int32_t x,
+                         int32_t y)
+{
+    struct wakefield *wakefield = wl_resource_get_user_data(resource);
+
+    if (!check_buffer_type_supported(wakefield, resource, buffer_resource)) {
+        return;
+    }
+
+    struct wl_shm_buffer *buffer = wl_shm_buffer_get(buffer_resource);
+    assert (buffer); // actually, verified earlier
+    const uint32_t buffer_format = wl_shm_buffer_get_format(buffer);
+    if (!check_buffer_format_supported(wakefield, resource, buffer_resource, buffer_format)) {
+        return;
+    }
+
+    clear_buffer(buffer); // in case some outputs disappear mid-flight or a part of the capture is out of screen
+
+    const int32_t width  = wl_shm_buffer_get_width(buffer);
+    const int32_t height = wl_shm_buffer_get_height(buffer);
+
+    pixman_region32_t region_global;    // capture region in global coordinates
+    pixman_region32_t region_in_output; // capture region in a particular output in that output's coordinates
+
+    pixman_region32_init_rect(&region_global, x, y, width, height);
+    pixman_region32_init(&region_in_output);
+
+    bool fits_entirely;
+    const uint64_t largest_capture_area = get_largest_area_in_one_output(wakefield->compositor, &region_global, &fits_entirely);
+    if (capture_is_empty(wakefield, resource, buffer_resource, largest_capture_area)) {
+        return;
+    }
+
+    const size_t bpp = 4; // byte-per-pixel
+    void *per_output_buffer = NULL;
+    if (!fits_entirely) {
+        // Can't read screen pixels directly into the resulting buffer, have to use an intermediate storage.
+        per_output_buffer = malloc(largest_capture_area * bpp);
+        if (per_output_buffer == NULL) {
+            weston_log_scope_printf(wakefield->log,
+                                    "WAKEFIELD: failed to allocate %ld bytes for temporary capture buffer.\n",
+                                    largest_capture_area);
+            wakefield_send_capture_ready(resource, buffer_resource, WAKEFIELD_ERROR_OUT_OF_MEMORY);
+            return;
+        }
+    }
+
+    const pixman_format_code_t buffer_format_pixman = wl_shm_format_to_pixman(buffer_format);
+    struct weston_output *output;
+    wl_list_for_each(output, &wakefield->compositor->output_list, link) {
+        if (output->destroying)
+            continue;
+
+        pixman_region32_intersect(&region_in_output, &region_global, &output->region);
+        if (pixman_region32_not_empty(&region_in_output)) {
+            const pixman_box32_t * const e = pixman_region32_extents(&region_in_output);
+
+            const int32_t region_x_in_global = e->x1;
+            const int32_t region_y_in_global = e->y1;
+            const int32_t width_in_output    = e->x2 - e->x1;
+            const int32_t height_in_output   = e->y2 - e->y1;
+            weston_log_scope_printf(wakefield->log, "WAKEFIELD: output '%s' has a chunk of the image at (%d, %d) sized (%d, %d)\n",
+                                    output->name,
+                                    e->x1, e->y1,
+                                    width_in_output, height_in_output);
+
+            // Better, but not available in the current libweston:
+            // weston_output_region_from_global(output, &region_in_output);
+
+            // Now convert region_in_output from global to output-local coordinates.
+            pixman_region32_translate(&region_in_output, -output->x, -output->y);
+
+            const pixman_box32_t * const e_in_output = pixman_region32_extents(&region_in_output);
+            const int32_t x_in_output = e_in_output->x1;
+            const int32_t y_in_output = e_in_output->y1;
+
+            weston_log_scope_printf(wakefield->log,
+                                    "WAKEFIELD: grabbing pixels at (%d, %d) of size %dx%d, format %s\n",
+                                    x_in_output, y_in_output,
+                                    width_in_output, height_in_output,
+                                    buffer_format_pixman == PIXMAN_a8r8g8b8 ? "ARGB8888" : "XRGB8888");
+
+            if (per_output_buffer) {
+                wakefield->compositor->renderer->read_pixels(output,
+                                                             buffer_format_pixman, // TODO: may not work with all renderers, check screenshooter_frame_notify() in libweston
+                                                             per_output_buffer,
+                                                             x_in_output, y_in_output,
+                                                             width_in_output, height_in_output);
+
+                copy_pixels_to_shm_buffer(buffer, per_output_buffer,
+                                          region_x_in_global - x, region_y_in_global - y,
+                                          width_in_output, height_in_output);
+            } else {
+                wl_shm_buffer_begin_access(buffer);
+                {
+                    void *data = wl_shm_buffer_get_data(buffer);
+                    wakefield->compositor->renderer->read_pixels(output,
+                                                                 buffer_format_pixman,
+                                                                 data,
+                                                                 x_in_output, y_in_output,
+                                                                 width, height);
+                }
+                wl_shm_buffer_end_access(buffer);
+                // This is the case of the entire region located on just one output,
+                // and we have just processed it, so can exit immediately.
+                break;
+            }
+        }
+
+        pixman_region32_fini(&region_in_output);
+        pixman_region32_fini(&region_global);
+    }
+
+    if (per_output_buffer) {
+        free(per_output_buffer);
+    }
+
+    wakefield_send_capture_ready(resource, buffer_resource, WAKEFIELD_ERROR_NO_ERROR);
+}
+
+static const struct wakefield_interface wakefield_implementation = {
+        .get_surface_location = wakefield_get_surface_location,
+        .move_surface = wakefield_move_surface,
+        .get_pixel_color = wakefield_get_pixel_color,
+        .capture_create = wakefield_capture_create
+};
+
+static void
+wakefield_bind(struct wl_client *client, void *data, uint32_t version, uint32_t id)
+{
+    struct wakefield *wakefield = data;
+
+    struct wl_resource *resource = wl_resource_create(client, &wakefield_interface, 1, id);
+    if (resource) {
+        wl_resource_set_implementation(resource, &wakefield_implementation, wakefield, NULL);
+    }
+
+    weston_log_scope_printf(wakefield->log, "WAKEFIELD: bind\n");
+}
+
+static void
+wakefield_destroy(struct wl_listener *listener, void *data)
+{
+    struct wakefield *wakefield = container_of(listener, struct wakefield, destroy_listener);
+
+    weston_log_scope_printf(wakefield->log, "WAKEFIELD: destroy\n");
+
+    wl_list_remove(&wakefield->destroy_listener.link);
+
+    weston_log_scope_destroy(wakefield->log);
+    free(wakefield);
+}
+
+WL_EXPORT int
+wet_module_init(struct weston_compositor *wc, int *argc, char *argv[])
+{
+    struct wakefield *wakefield = zalloc(sizeof(struct wakefield));
+    if (wakefield == NULL)
+        return -1;
+
+    if (!weston_compositor_add_destroy_listener_once(wc, &wakefield->destroy_listener,
+                                                     wakefield_destroy)) {
+        free(wakefield);
+        return 0;
+    }
+
+
+    wakefield->compositor = wc;
+    // Log scope; add this to weston option list to subscribe: `--logger-scopes=wakefield`
+    // See https://wayland.pages.freedesktop.org/weston/toc/libweston/log.html for more info.
+    wakefield->log = weston_compositor_add_log_scope(wc, "wakefield",
+                                                     "wakefield plugin own actions",
+                                                     NULL, NULL, NULL);
+
+    if (wl_global_create(wc->wl_display, &wakefield_interface,
+                         1, wakefield, wakefield_bind) == NULL) {
+        wl_list_remove(&wakefield->destroy_listener.link);
+        return -1;
+    }
+
+    return 0;
+}

src/java.desktop/unix/classes/sun/awt/PlatformGraphicsInfo.java

@@ -28,17 +28,51 @@ package sun.awt;
 import java.io.File;
 import java.awt.GraphicsEnvironment;
 import java.awt.Toolkit;
+import java.lang.annotation.Native;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 
+import sun.awt.wl.WLGraphicsEnvironment;
+import sun.security.action.GetPropertyAction;
+
 public class PlatformGraphicsInfo {
+    @Native
+    public static final int TK_UNDEF   = 0;
+    @Native
+    public static final int TK_X11     = 1;
+    @Native
+    public static final int TK_WAYLAND = 2;
+
+    private static int toolkitID = TK_UNDEF;
+
+    private static int getToolkitID() {
+        if (toolkitID == TK_UNDEF) {
+            @SuppressWarnings("removal")
+            String name = AccessController.doPrivileged(
+                new GetPropertyAction("awt.toolkit.name"));
+            if ("XToolkit".equals(name)) {
+                toolkitID = TK_X11;
+            } if ("WLToolkit".equals(name)) {
+                toolkitID = TK_WAYLAND;
+            } else {
+                toolkitID = TK_X11;
+            }
+        }
+        return toolkitID;
+    }
 
     public static GraphicsEnvironment createGE() {
-        return new X11GraphicsEnvironment();
+        return (getToolkitID() == TK_X11)?
+                new X11GraphicsEnvironment() :
+                new WLGraphicsEnvironment();
     }
 
     public static Toolkit createToolkit() {
-        return new sun.awt.X11.XToolkit();
+        return  (getToolkitID() == TK_X11)?
+            new sun.awt.X11.XToolkit() :
+            new sun.awt.wl.WLToolkit();
     }
 
     /**
@@ -52,8 +86,26 @@ public class PlatformGraphicsInfo {
         boolean noDisplay =
             AccessController.doPrivileged((PrivilegedAction<Boolean>) () -> {
 
-               final String display = System.getenv("DISPLAY");
-               return display == null || display.trim().isEmpty();
+                if (getToolkitID() == TK_X11) {
+                    final String display = System.getenv("DISPLAY");
+                    return display == null || display.trim().isEmpty();
+                } else {
+                    // This code needs to be in sync with what wl_display_connect() does
+                    // in WLToolkit.initIDs().
+                    final String wl_display = System.getenv("WAYLAND_DISPLAY");
+                    if (wl_display != null && !wl_display.trim().isEmpty()) {
+                        return false; // not headless
+                    }
+
+                    // Check $XDG_RUNTIME_DIR/wayland-0.
+                    final String socketDir = System.getenv("XDG_RUNTIME_DIR");
+                    if (socketDir != null && !socketDir.trim().isEmpty()) {
+                        final Path defaultSocketPath = Path.of(socketDir).resolve("wayland-0");
+                        return !Files.isReadable(defaultSocketPath);
+                    }
+
+                    return true;
+                }
             });
         if (noDisplay) {
             return true;

src/java.desktop/unix/classes/sun/awt/wl/WLButtonPeer.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package sun.awt.wl;
+
+import java.awt.Button;
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.event.FocusEvent;
+import java.awt.peer.ButtonPeer;
+import sun.util.logging.PlatformLogger;
+
+public class WLButtonPeer extends WLComponentPeer implements ButtonPeer {
+    private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.wl.WLButtonPeer");
+    String label;
+
+
+    public WLButtonPeer(Button target) {
+        super(target);
+        label = target.getLabel();
+    }
+
+    public boolean isFocusable() {
+        return true;
+    }
+
+    @Override
+    public void setLabel(String label) {
+        log.info("Not implemented: WLButtonPeer.setLabel(String)");
+    }
+
+    public void setBackground(Color c) {
+        super.setBackground(c);
+    }
+
+    public void focusGained(FocusEvent e) {
+        super.focusGained(e);
+        log.info("Not implemented: WLButtonPeer.focusGained(FocusEvent)");
+    }
+
+    public void focusLost(FocusEvent e) {
+        super.focusLost(e);
+        log.info("Not implemented: WLButtonPeer.focusLost(FocusEvent)");
+    }
+
+    @Override
+    void paintPeer(Graphics g) {
+        super.paintPeer(g);
+        log.info("Not implemented: WLButtonPeer.paintPeer(Graphics)");
+    }
+
+    public Dimension getMinimumSize() {
+        log.info("Not implemented: WLButtonPeer.getMinimumSize()");
+        return new Dimension(0, 0);
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLCanvasPeer.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2002, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package sun.awt.wl;
+
+import java.awt.Component;
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsEnvironment;
+import java.awt.peer.CanvasPeer;
+
+class WLCanvasPeer extends WLComponentPeer implements CanvasPeer {
+
+    private boolean eraseBackgroundDisabled;
+
+
+    WLCanvasPeer(Component target) {
+        super(target);
+    }
+
+
+    public GraphicsConfiguration getAppropriateGraphicsConfiguration(
+                                    GraphicsConfiguration gc)
+    {
+        if (graphicsConfig == null || gc == null) {
+            return gc;
+        }
+
+        graphicsConfig = (WLGraphicsConfig) GraphicsEnvironment.
+                getLocalGraphicsEnvironment().
+                getScreenDevices()[0].
+                getDefaultConfiguration();
+
+
+        return graphicsConfig;
+    }
+
+    protected boolean shouldFocusOnClick() {
+        // Canvas should always be able to be focused by mouse clicks.
+        return true;
+    }
+
+    public void disableBackgroundErase() {
+        eraseBackgroundDisabled = true;
+    }
+    protected boolean doEraseBackground() {
+        return !eraseBackgroundDisabled;
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLComponentPeer.java

@@ -0,0 +1,553 @@
+/*
+ * Copyright (c) 2022, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.awt.wl;
+
+import static sun.awt.wl.WLToolkit.postEvent;
+
+import java.awt.AWTEvent;
+import java.awt.AWTException;
+import java.awt.BufferCapabilities;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.GraphicsConfiguration;
+import java.awt.Image;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.SystemColor;
+import java.awt.Toolkit;
+import java.awt.Window;
+import java.awt.event.FocusEvent;
+import java.awt.event.InputEvent;
+import java.awt.event.InputMethodEvent;
+import java.awt.event.KeyEvent;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseWheelEvent;
+import java.awt.event.PaintEvent;
+import java.awt.event.WindowEvent;
+import java.awt.image.ColorModel;
+import java.awt.image.VolatileImage;
+import java.awt.peer.ComponentPeer;
+import java.awt.peer.ContainerPeer;
+import java.util.Objects;
+import sun.awt.AWTAccessor;
+import sun.awt.AWTAccessor.ComponentAccessor;
+import sun.awt.PaintEventDispatcher;
+import sun.awt.SunToolkit;
+import sun.awt.event.IgnorePaintEvent;
+import sun.java2d.SunGraphics2D;
+import sun.java2d.SurfaceData;
+import sun.java2d.pipe.Region;
+import sun.java2d.wl.WLSurfaceData;
+import sun.util.logging.PlatformLogger;
+import sun.util.logging.PlatformLogger.Level;
+
+
+public class WLComponentPeer implements ComponentPeer
+{
+    private long nativePtr;
+    private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.wl.WLComponentPeer");
+    protected final Component target;
+    protected WLGraphicsConfig graphicsConfig;
+    protected Color background;
+    SurfaceData surfaceData;
+    WLRepaintArea paintArea;
+    boolean paintPending = false;
+    boolean isLayouting = false;
+    boolean visible = false;
+
+    int x;
+    int y;
+    int width;
+    int height;
+    // used to check if we need to re-create surfaceData.
+    int oldWidth = -1;
+    int oldHeight = -1;
+
+    static {
+        initIDs();
+    }
+
+    /**
+     * Standard peer constructor, with corresponding Component
+     */
+    WLComponentPeer(Component target) {
+        this.target = target;
+        this.background = target.getBackground();
+        initGraphicsConfiguration();
+        this.surfaceData = graphicsConfig.createSurfaceData(this);
+        this.nativePtr = nativeCreateFrame();
+        paintArea = new WLRepaintArea();
+        Rectangle bounds = target.getBounds();
+        x = bounds.x;
+        y = bounds.y;
+        width = bounds.width;
+        height = bounds.height;
+        log.info("WLComponentPeer: target=" + target + " x=" + x + " y=" + y +
+                 " width=" + width + " height=" + height);
+        // TODO
+        // setup parent window for target
+    }
+
+    int getWidth() {
+        return width;
+    }
+
+    int getHeight() {
+        return height;
+    }
+
+    public final void repaint(int x, int y, int width, int height) {
+        if (!isVisible() || getWidth() == 0 || getHeight() == 0) {
+            return;
+        }
+        Graphics g = getGraphics();
+        if (g != null) {
+            try {
+                g.setClip(x, y, width, height);
+                if (SunToolkit.isDispatchThreadForAppContext(getTarget())) {
+                    paint(g); // The native and target will be painted in place.
+                } else {
+                    paintPeer(g);
+                    postPaintEvent(target, x, y, width, height);
+                }
+            } finally {
+                g.dispose();
+            }
+        }
+    }
+
+    public void postPaintEvent(Component target, int x, int y, int w, int h) {
+        PaintEvent event = PaintEventDispatcher.getPaintEventDispatcher().
+                createPaintEvent(target, x, y, w, h);
+        if (event != null) {
+            postEvent(event);
+        }
+    }
+
+    void postPaintEvent() {
+        if (isVisible()) {
+            PaintEvent pe = new PaintEvent(target, PaintEvent.PAINT,
+                    new Rectangle(0, 0, width, height));
+            postEvent(pe);
+        }
+    }
+
+    boolean isVisible() {
+        return visible;
+    }
+
+    void repaint() {
+        repaint(0, 0, getWidth(), getHeight());
+    }
+
+    @Override
+    public void reparent(ContainerPeer newContainer) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isReparentSupported() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isObscured() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean canDetermineObscurity() {
+        throw new UnsupportedOperationException();
+    }
+
+    public void focusGained(FocusEvent e) {
+        log.info("Not implemented: WLComponentPeer.isObscured()");
+    }
+
+    public void focusLost(FocusEvent e) {
+        log.info("Not implemented: WLComponentPeer.focusLost(FocusEvent)");
+    }
+
+    @Override
+    public boolean isFocusable() {
+        log.info("Not implemented: WLComponentPeer.isFocusable()");
+        return false;
+    }
+
+    public boolean requestFocus(Component lightweightChild, boolean temporary,
+                                      boolean focusedWindowChangeAllowed, long time,
+                                      FocusEvent.Cause cause)
+    {
+        log.info("Not implemented: WLComponentPeer.focusLost(FocusEvent)");
+        return true;
+    }
+
+    protected void wlSetVisible(boolean v) {
+        this.visible = v;
+        if (this.visible) {
+            nativeShowComponent(nativePtr, getParentNativePtr(target), target.getX(), target.getY());
+            ((WLSurfaceData)surfaceData).initSurface(this, background != null ? background.getRGB() : 0, target.getWidth(), target.getHeight());
+            PaintEvent event = PaintEventDispatcher.getPaintEventDispatcher().
+                    createPaintEvent(target, 0, 0, target.getWidth(), target.getHeight());
+            if (event != null) {
+                WLToolkit.postEvent(WLToolkit.targetToAppContext(event.getSource()), event);
+            }
+        } else {
+            nativeHideFrame(nativePtr);
+        }
+    }
+
+    @Override
+    public void setVisible(boolean v) {
+        wlSetVisible(v);
+    }
+
+    /**
+     * @see ComponentPeer
+     */
+    public void setEnabled(final boolean value) {
+        log.info("Not implemented: WLComponentPeer.setEnabled(boolean)");
+    }
+
+    @Override
+    public void paint(final Graphics g) {
+        paintPeer(g);
+        target.paint(g);
+    }
+
+    void paintPeer(final Graphics g) {
+        log.info("Not implemented: WLComponentPeer.paintPeer(Graphics)");
+    }
+
+    Graphics getGraphics(SurfaceData surfData, Color afore, Color aback, Font afont) {
+        if (surfData == null) return null;
+
+        Color bgColor = aback;
+        if (bgColor == null) {
+            bgColor = SystemColor.window;
+        }
+        Color fgColor = afore;
+        if (fgColor == null) {
+            fgColor = SystemColor.windowText;
+        }
+        Font font = afont;
+        if (font == null) {
+            font = new Font(Font.DIALOG, Font.PLAIN, 12);
+        }
+        return new SunGraphics2D(surfData, fgColor, bgColor, font);
+    }
+
+    public Graphics getGraphics() {
+        return getGraphics(surfaceData,
+                target.getForeground(),
+                target.getBackground(),
+                target.getFont());
+    }
+
+    public Component getTarget() {
+        return target;
+    }
+
+    public void print(Graphics g) {
+        log.info("Not implemented: WLComponentPeer.print(Graphics)");
+    }
+
+    public void setBounds(int x, int y, int width, int height, int op) {
+        if (this.x != x || this.y != y) {
+            WLRobotPeer.setLocationOfWLSurface(getWLSurface(), x, y);
+        }
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+        validateSurface();
+        layout();
+    }
+
+    void validateSurface() {
+        if ((width != oldWidth) || (height != oldHeight)) {
+            doValidateSurface();
+
+            oldWidth = width;
+            oldHeight = height;
+        }
+    }
+
+    final void doValidateSurface() {
+        SurfaceData oldData = surfaceData;
+        if (oldData != null) {
+            surfaceData = graphicsConfig.createSurfaceData(this);
+            oldData.invalidate();
+        }
+    }
+
+    public void coalescePaintEvent(PaintEvent e) {
+        Rectangle r = e.getUpdateRect();
+        if (!(e instanceof IgnorePaintEvent)) {
+
+            paintArea.add(r, e.getID());
+        }
+        if (true) {
+            switch(e.getID()) {
+                case PaintEvent.UPDATE:
+                    if (log.isLoggable(Level.INFO)) {
+                        log.info("WLCP coalescePaintEvent : UPDATE : add : x = " +
+                                r.x + ", y = " + r.y + ", width = " + r.width + ",height = " + r.height);
+                    }
+                    return;
+                case PaintEvent.PAINT:
+                    if (log.isLoggable(Level.INFO)) {
+                        log.info("WLCP coalescePaintEvent : PAINT : add : x = " +
+                                r.x + ", y = " + r.y + ", width = " + r.width + ",height = " + r.height);
+                    }
+                    return;
+            }
+        }
+    }
+
+    @Override
+    public Point getLocationOnScreen() {
+        final long wlSurfacePtr = getWLSurface();
+        if (wlSurfacePtr != 0) {
+            return WLRobotPeer.getLocationOfWLSurface(wlSurfacePtr);
+        } else {
+            throw new UnsupportedOperationException("getLocationOnScreen() not supported without wayland surface");
+        }
+    }
+
+    @SuppressWarnings("fallthrough")
+    public void handleEvent(AWTEvent e) {
+        if ((e instanceof InputEvent) && !((InputEvent) e).isConsumed() && target.isEnabled()) {
+            if (e instanceof MouseEvent) {
+                if (e instanceof MouseWheelEvent) {
+                    log.info("Not implemented: WLComponentPeer.handleEvent(AWTEvent): MouseWheelEvent");
+                } else
+                    log.info("Not implemented: WLComponentPeer.handleEvent(AWTEvent): MouseEvent");
+            } else if (e instanceof KeyEvent) {
+                log.info("Not implemented: WLComponentPeer.handleEvent(AWTEvent): handleF10JavaKeyEvent");
+                log.info("Not implemented: WLComponentPeer.handleEvent(AWTEvent): handleJavaKeyEvent");
+            }
+        } else if (e instanceof KeyEvent && !((InputEvent) e).isConsumed()) {
+            // even if target is disabled.
+            log.info("Not implemented: WLComponentPeer.handleEvent(AWTEvent): handleF10JavaKeyEvent");
+        } else if (e instanceof InputMethodEvent) {
+            log.info("Not implemented: WLComponentPeer.handleEvent(AWTEvent): handleJavaInputMethodEvent");
+        }
+
+        int id = e.getID();
+
+        switch (id) {
+            case PaintEvent.PAINT:
+                // Got native painting
+                paintPending = false;
+                // Fallthrough to next statement
+            case PaintEvent.UPDATE:
+                log.info("WLComponentPeer.handleEvent(AWTEvent): UPDATE " + this);
+                // Skip all painting while layouting and all UPDATEs
+                // while waiting for native paint
+                if (!isLayouting && !paintPending) {
+                    paintArea.paint(target, false);
+                }
+                return;
+            case FocusEvent.FOCUS_LOST:
+            case FocusEvent.FOCUS_GAINED:
+                log.info("Not implemented: WLComponentPeer.handleEvent(AWTEvent): handleJavaFocusEvent");
+                break;
+            case WindowEvent.WINDOW_LOST_FOCUS:
+            case WindowEvent.WINDOW_GAINED_FOCUS:
+                log.info("Not implemented: WLComponentPeer.handleEvent(AWTEvent): handleJavaWindowFocusEvent");
+                break;
+            default:
+                break;
+        }
+    }
+
+    public void beginLayout() {
+        // Skip all painting till endLayout
+        isLayouting = true;
+
+    }
+
+    public void endLayout() {
+        log.info("WLComponentPeer.endLayout(): paintArea.isEmpty() " + paintArea.isEmpty());
+        if (!paintPending && !paintArea.isEmpty()
+                && !AWTAccessor.getComponentAccessor().getIgnoreRepaint(target))
+        {
+            // if not waiting for native painting repaint damaged area
+            postEvent(new PaintEvent(target, PaintEvent.PAINT,
+                    new Rectangle()));
+        }
+        isLayouting = false;
+    }
+
+    public Dimension getMinimumSize() {
+        return target.getSize();
+    }
+
+    @Override
+    public ColorModel getColorModel() {
+        if (graphicsConfig != null) {
+            return graphicsConfig.getColorModel ();
+        }
+        else {
+            return Toolkit.getDefaultToolkit().getColorModel();
+        }
+    }
+
+    public Dimension getPreferredSize() {
+        return getMinimumSize();
+    }
+
+    public void layout() {}
+
+    @Override
+    public void setBackground(Color c) {
+        if (Objects.equals(background, c)) {
+            return;
+        }
+        background = c;
+    }
+
+    @Override
+    public void setForeground(Color c) {
+        if (log.isLoggable(PlatformLogger.Level.FINE)) {
+            log.fine("Set foreground to " + c);
+        }
+        log.info("Not implemented: WLComponentPeer.setForeground(Color)");
+    }
+
+    @Override
+    public FontMetrics getFontMetrics(Font font) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void dispose() {
+        nativeDisposeFrame(nativePtr);
+    }
+
+    @Override
+    public void setFont(Font f) {
+        throw new UnsupportedOperationException();
+    }
+
+    public Font getFont() {
+        return null;
+    }
+
+    public void updateCursorImmediately() {
+        log.info("Not implemented: WLComponentPeer.updateCursorImmediately()");
+    }
+
+    @Override
+    public Image createImage(int width, int height) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public VolatileImage createVolatileImage(int width, int height) {
+        throw new UnsupportedOperationException();
+    }
+
+    protected void initGraphicsConfiguration() {
+        graphicsConfig = (WLGraphicsConfig) target.getGraphicsConfiguration();
+    }
+
+    @Override
+    public GraphicsConfiguration getGraphicsConfiguration() {
+        if (graphicsConfig == null) {
+            initGraphicsConfiguration();
+        }
+        return graphicsConfig;
+    }
+
+    @Override
+    public boolean handlesWheelScrolling() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void createBuffers(int numBuffers, BufferCapabilities caps) throws AWTException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void flip(int x1, int y1, int x2, int y2, BufferCapabilities.FlipContents flipAction) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Image getBackBuffer() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void destroyBuffers() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setZOrder(ComponentPeer above) {
+        log.info("Not implemented: WLComponentPeer.setZOrder(ComponentPeer)");
+    }
+
+    @Override
+    public void applyShape(Region shape) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean updateGraphicsData(GraphicsConfiguration gc) {
+        throw new UnsupportedOperationException();
+    }
+
+    private static native void initIDs();
+
+    protected native long nativeCreateFrame();
+
+    protected native void nativeShowComponent(long ptr, long parentPtr, int x, int y);
+
+    protected native void nativeHideFrame(long ptr);
+
+    protected native void nativeDisposeFrame(long ptr);
+
+    private native long getWLSurface();
+
+    static long getParentNativePtr(Component target) {
+        Component parent = target.getParent();
+        if (parent == null) return 0;
+
+        final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
+        ComponentPeer peer = acc.getPeer(parent);
+
+        return ((WLComponentPeer)peer).nativePtr;
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLFramePeer.java

@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package sun.awt.wl;
+
+import java.awt.Component;
+import java.awt.Window;
+import java.awt.Dialog;
+import java.awt.Frame;
+import java.awt.Insets;
+import java.awt.MenuBar;
+import java.awt.Rectangle;
+import java.awt.event.WindowEvent;
+import java.awt.peer.ComponentPeer;
+import java.awt.peer.FramePeer;
+import sun.awt.AWTAccessor;
+import sun.awt.AWTAccessor.ComponentAccessor;
+import sun.util.logging.PlatformLogger;
+
+public class WLFramePeer extends WLComponentPeer implements FramePeer {
+    private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.wl.WLFramePeer");
+
+    public WLFramePeer(Frame target) {
+        super(target);
+    }
+
+    @Override
+    protected void wlSetVisible(boolean v) {
+        super.wlSetVisible(v);
+        final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
+        for (Component c : ((Frame)target).getComponents()) {
+            ComponentPeer cPeer = acc.getPeer(c);
+            if (cPeer instanceof WLComponentPeer) {
+                ((WLComponentPeer) cPeer).wlSetVisible(v);
+            }
+        }
+    }
+
+    private static native void initIDs();
+
+    @Override
+    public Insets getInsets() {
+        return new Insets(0, 0, 0, 0);
+    }
+
+    @Override
+    public void beginValidate() {
+    }
+
+    @Override
+    public void endValidate() {
+    }
+
+//    @Override
+//    public void beginLayout() {
+//        log.info("Not implemented: WLFramePeer.beginLayout()");
+//    }
+//
+//    @Override
+//    public void endLayout() {
+//        log.info("Not implemented: WLFramePeer.endLayout()");
+//    }
+
+    @Override
+    public void setTitle(String title) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setMenuBar(MenuBar mb) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setResizable(boolean resizeable) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setState(int state) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int getState() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setMaximizedBounds(Rectangle bounds) {
+    }
+
+    @Override
+    public void setBoundsPrivate(int x, int y, int width, int height) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Rectangle getBoundsPrivate() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void emulateActivation(boolean activate) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void toFront() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void toBack() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void updateAlwaysOnTopState() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void updateFocusableWindowState() {
+    }
+
+    @Override
+    public void setModalBlocked(Dialog blocker, boolean blocked) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void updateMinimumSize() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void updateIconImages() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setOpacity(float opacity) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setOpaque(boolean isOpaque) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void updateWindow() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void repositionSecurityWarning() {
+        throw new UnsupportedOperationException();
+    }
+
+    // called from native code
+    private void postWindowClosing() {
+        WLToolkit.postEvent(new WindowEvent((Window) target, WindowEvent.WINDOW_CLOSING));
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLGraphicsConfig.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.awt.wl;
+
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsDevice;
+import java.awt.Rectangle;
+import java.awt.geom.AffineTransform;
+import java.awt.image.ColorModel;
+import java.awt.image.DirectColorModel;
+import sun.java2d.SurfaceData;
+import sun.java2d.loops.SurfaceType;
+import sun.java2d.wl.WLSurfaceData;
+
+public class WLGraphicsConfig extends GraphicsConfiguration {
+    private final WLGraphicsDevice device;
+    private final Rectangle bounds = new Rectangle(800, 600);
+
+    public WLGraphicsConfig(WLGraphicsDevice device) {
+        this.device = device;
+    }
+
+    @Override
+    public WLGraphicsDevice getDevice() {
+        return device;
+    }
+
+    @Override
+    public ColorModel getColorModel() {
+        return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
+    }
+
+    @Override
+    public ColorModel getColorModel(int transparency) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public AffineTransform getDefaultTransform() {
+        double scale = getScale();
+        return AffineTransform.getScaleInstance(scale, scale);
+    }
+
+    @Override
+    public AffineTransform getNormalizingTransform() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Rectangle getBounds() {
+        return bounds;
+    }
+
+    public SurfaceType getSurfaceType() {
+        return SurfaceType.IntArgb;
+    }
+
+    public SurfaceData createSurfaceData(WLComponentPeer peer) {
+        return WLSurfaceData.createData(peer);
+    }
+
+    public double getScale() {
+        return getDevice().getScaleFactor();
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLGraphicsDevice.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.awt.wl;
+
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsDevice;
+
+public class WLGraphicsDevice extends GraphicsDevice {
+    private double scale = 1.0;
+
+    private final WLGraphicsConfig config = new WLGraphicsConfig(this);
+
+    @Override
+    public int getType() {
+        return TYPE_RASTER_SCREEN;
+    }
+
+    @Override
+    public String getIDstring() {
+        return "WLGraphicsDevice";
+    }
+
+    @Override
+    public GraphicsConfiguration[] getConfigurations() {
+        return new GraphicsConfiguration[] {config};
+    }
+
+    @Override
+    public GraphicsConfiguration getDefaultConfiguration() {
+        return config;
+    }
+
+    public double getScaleFactor() {
+        return scale;
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLGraphicsEnvironment.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.awt.wl;
+
+import java.awt.GraphicsDevice;
+import sun.java2d.SunGraphicsEnvironment;
+import sun.java2d.SurfaceManagerFactory;
+import sun.java2d.UnixSurfaceManagerFactory;
+import sun.util.logging.PlatformLogger;
+
+public class WLGraphicsEnvironment extends SunGraphicsEnvironment {
+    private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.wl.WLComponentPeer");
+    static {
+        SurfaceManagerFactory.setInstance(new UnixSurfaceManagerFactory());
+    }
+
+    @Override
+    protected int getNumScreens() {
+        log.info("Not implemented: WLGraphicsEnvironment.getNumScreens()");
+        return 1;
+    }
+
+    @Override
+    protected GraphicsDevice makeScreenDevice(int screennum) {
+        log.info("Not implemented: WLGraphicsEnvironment.makeScreenDevice(int)");
+        return new WLGraphicsDevice();
+    }
+
+    @Override
+    public boolean isDisplayLocal() {
+        return true;
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLKeyboardFocusManagerPeer.java

@@ -0,0 +1,38 @@
+package sun.awt.wl;
+
+import java.awt.Component;
+import java.awt.Window;
+import java.awt.peer.KeyboardFocusManagerPeer;
+
+public class WLKeyboardFocusManagerPeer implements KeyboardFocusManagerPeer {
+    private static final WLKeyboardFocusManagerPeer instance = new WLKeyboardFocusManagerPeer();
+
+    public static WLKeyboardFocusManagerPeer getInstance() {
+        return instance;
+    }
+
+    @Override
+    public void setCurrentFocusedWindow(Window win) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Window getCurrentFocusedWindow() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setCurrentFocusOwner(Component comp) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Component getCurrentFocusOwner() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void clearGlobalFocusOwner(Window activeWindow) {
+        throw new UnsupportedOperationException();
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLLightweightFramePeer.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.awt.wl;
+
+import java.awt.Graphics;
+import sun.awt.LightweightFrame;
+import sun.awt.OverrideNativeWindowHandle;
+import sun.swing.JLightweightFrame;
+import sun.swing.SwingAccessor;
+
+public class WLLightweightFramePeer extends WLFramePeer implements OverrideNativeWindowHandle {
+
+    WLLightweightFramePeer(LightweightFrame target) {
+        super(target);
+    }
+
+    private LightweightFrame getLwTarget() {
+        return (LightweightFrame)target;
+    }
+
+    @Override
+    public Graphics getGraphics() {
+        return getLwTarget().getGraphics();
+    }
+
+
+    @Override
+    public void updateCursorImmediately() {
+        SwingAccessor.getJLightweightFrameAccessor().updateCursor((JLightweightFrame)getLwTarget());
+    }
+
+    private volatile long overriddenWindowHandle;
+
+    @Override
+    public void overrideWindowHandle(final long handle) {
+        overriddenWindowHandle = handle;
+    }
+
+    public long getOverriddenWindowHandle() {
+        return overriddenWindowHandle;
+    }
+
+    @Override
+    public void wlSetVisible(boolean visible) {
+        this.visible = visible;
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLRepaintArea.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+package sun.awt.wl;
+
+import java.awt.Component;
+import java.awt.Graphics;
+import sun.awt.AWTAccessor;
+import sun.awt.RepaintArea;
+import sun.awt.X11.XComponentPeer;
+
+/**
+ * The {@code RepaintArea} is a geometric construct created for the
+ * purpose of holding the geometry of several coalesced paint events.
+ * This geometry is accessed synchronously, although it is written such
+ * that painting may still be executed asynchronously.
+ *
+ * @author      Eric Hawkes
+ */
+final class WLRepaintArea extends RepaintArea {
+
+    /**
+     * Calls {@code Component.update(Graphics)} with given Graphics.
+     */
+    protected void updateComponent(Component comp, Graphics g) {
+        if (comp != null) {
+            // We don't call peer.paintPeer() here, because we shouldn't paint
+            // native component when processing UPDATE events.
+            super.updateComponent(comp, g);
+        }
+    }
+
+    /**
+     * Calls {@code Component.paint(Graphics)} with given Graphics.
+     */
+    protected void paintComponent(Component comp, Graphics g) {
+        if (comp != null) {
+            final WLComponentPeer peer = AWTAccessor.getComponentAccessor()
+                                                   .getPeer(comp);
+            if (peer != null) {
+                peer.paintPeer(g);
+            }
+            super.paintComponent(comp, g);
+        }
+    }
+}

src/java.desktop/unix/classes/sun/awt/wl/WLRobotPeer.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.awt.wl;
+
+import java.awt.*;
+import java.awt.peer.RobotPeer;
+
+public class WLRobotPeer implements RobotPeer {
+    private final WLGraphicsConfig wgc;
+
+    static {
+        initIDs();
+    }
+
+    public WLRobotPeer(WLGraphicsDevice gd) {
+        wgc = (WLGraphicsConfig) gd.getDefaultConfiguration();
+    }
+
+    @Override
+    public void mouseMove(int x, int y) {
+        throw new UnsupportedOperationException("Not implemented: WLRobotPeer.mouseMove()");
+    }
+
+    @Override
+    public void mousePress(int buttons) {
+        throw new UnsupportedOperationException("Not implemented: WLRobotPeer.mousePress()");
+    }
+
+    @Override
+    public void mouseRelease(int buttons) {
+        throw new UnsupportedOperationException("Not implemented: WLRobotPeer.mouseRelease()");
+    }
+
+    @Override
+    public void mouseWheel(int wheelAmt) {
+        throw new UnsupportedOperationException("Not implemented: WLRobotPeer.mouseWheel()");
+    }
+
+    @Override
+    public void keyPress(int keycode) {
+        throw new UnsupportedOperationException("Not implemented: WLRobotPeer.keyPress()");
+    }
+
+    @Override
+    public void keyRelease(int keycode) {
+        throw new UnsupportedOperationException("Not implemented: WLRobotPeer.keyRelease()");
+    }
+
+    @Override
+    public int getRGBPixel(int x, int y) {
+        checkExtensionPresent();
+
+        // The native implementation allows for just one such request at a time
+        synchronized(WLRobotPeer.class) {
+            return getRGBPixelImpl(x, y);
+        }
+    }
+
+    @Override
+    public int [] getRGBPixels(Rectangle bounds) {
+        checkExtensionPresent();
+
+        // The native implementation allows for just one such request at a time
+        synchronized(WLRobotPeer.class) {
+            return getRGBPixelsImpl(bounds.x, bounds.y, bounds.width, bounds.height);
+        }
+    }
+
+    /**
+     * Retrieves the location in absolute coordinates of the Wayland
+     * surface pointed to by the argument.
+     * Throws UnsupportedOperationException if the Wayland extension
+     * that implements this wasn't loaded on the server side.
+     *
+     * @param wlSurfacePtr a pointer to struct wl_surface
+     * @return location of the surface in absolute coordinates
+     */
+    static Point getLocationOfWLSurface(long wlSurfacePtr) {
+        checkExtensionPresent();
+
+        // The native implementation allows for just one such request at a time
+        synchronized(WLRobotPeer.class) {
+            return getLocationOfWLSurfaceImpl(wlSurfacePtr);
+        }
+    }
+
+    /**
+     * Change the screen location of the given Wayland surface to the given
+     * absolute coordinates.
+     * Does nothing if the Wayland extension that supports this functionality
+     * was not loaded by the server.
+     *
+     * @param wlSurfacePtr a pointer to struct wl_surface
+     * @param x the absolute x-coordinate
+     * @param y the absolute y-coordinate
+     */
+    static void setLocationOfWLSurface(long wlSurfacePtr, int x, int y) {
+        if (isRobotExtensionPresent) {
+            setLocationOfWLSurfaceImpl(wlSurfacePtr, x, y);
+        }
+    }
+
+    private static void checkExtensionPresent() {
+        if (!isRobotExtensionPresent) {
+            throw new UnsupportedOperationException("WLRobotPeer: wakefield extension not present in Wayland instance");
+        }
+    }
+
+    private static final boolean  isRobotExtensionPresent = isRobotExtensionPresentImpl();
+
+    private static native void    initIDs();
+
+    private static native boolean isRobotExtensionPresentImpl();
+    private static native int     getRGBPixelImpl(int x, int y);
+    private static native int[]   getRGBPixelsImpl(int x, int y, int width, int height);
+    private static native Point   getLocationOfWLSurfaceImpl(long wlSurfacePtr);
+    private static native void    setLocationOfWLSurfaceImpl(long wlSurfacePtr, int x, int y);
+}

src/java.desktop/unix/classes/sun/awt/wl/WLToolkit.java

@@ -0,0 +1,662 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.awt.wl;
+
+import java.awt.*;
+import java.awt.datatransfer.Clipboard;
+import java.awt.dnd.DragGestureEvent;
+import java.awt.dnd.DragGestureListener;
+import java.awt.dnd.DragGestureRecognizer;
+import java.awt.dnd.DragSource;
+import java.awt.dnd.InvalidDnDOperationException;
+import java.awt.dnd.peer.DragSourceContextPeer;
+import java.awt.font.TextAttribute;
+import java.awt.im.InputMethodHighlight;
+import java.awt.im.spi.InputMethodDescriptor;
+import java.awt.peer.ButtonPeer;
+import java.awt.peer.CanvasPeer;
+import java.awt.peer.CheckboxMenuItemPeer;
+import java.awt.peer.CheckboxPeer;
+import java.awt.peer.ChoicePeer;
+import java.awt.peer.DesktopPeer;
+import java.awt.peer.DialogPeer;
+import java.awt.peer.FileDialogPeer;
+import java.awt.peer.FontPeer;
+import java.awt.peer.FramePeer;
+import java.awt.peer.KeyboardFocusManagerPeer;
+import java.awt.peer.LabelPeer;
+import java.awt.peer.ListPeer;
+import java.awt.peer.MenuBarPeer;
+import java.awt.peer.MenuItemPeer;
+import java.awt.peer.MenuPeer;
+import java.awt.peer.MouseInfoPeer;
+import java.awt.peer.PanelPeer;
+import java.awt.peer.PopupMenuPeer;
+import java.awt.peer.RobotPeer;
+import java.awt.peer.ScrollPanePeer;
+import java.awt.peer.ScrollbarPeer;
+import java.awt.peer.SystemTrayPeer;
+import java.awt.peer.TaskbarPeer;
+import java.awt.peer.TextAreaPeer;
+import java.awt.peer.TextFieldPeer;
+import java.awt.peer.TrayIconPeer;
+import java.awt.peer.WindowPeer;
+import java.beans.PropertyChangeListener;
+import java.util.Map;
+import java.util.Properties;
+
+import sun.awt.*;
+import sun.awt.datatransfer.DataTransferer;
+import sun.util.logging.PlatformLogger;
+
+/**
+ * On events handling: the WLToolkit class creates a thread named "AWT-Wayland"
+ * where the communication with the Wayland server is chiefly carried on such
+ * as sending requests over and receiving events from the server.
+ * For "system" events that are not meant to trigger any user code, a separate
+ * thread is utilized called "AWT-Wayland-system-dispatcher". It is the only
+ * thread where such events are handled. For other events, such as mouse click
+ * events, the Wayland handlers are supposed to "transfer" themselves to
+ * "AWT-EventThread" by means of SunToolkit.postEvent(). See the implementation
+ * of run() method for more comments.
+ */
+public class WLToolkit extends UNIXToolkit implements Runnable {
+    private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.wl.WLToolkit");
+
+    /**
+     * Maximum wait time in ms between attempts to receive more data (events)
+     * from the Wayland server on the toolkit thread.
+     */
+    private static final int WAYLAND_DISPLAY_INTERACTION_TIMEOUT_MS = 50;
+
+    /**
+     * Returned by readEvents() to signify the presence of new events
+     * on the default Wayland display queue that have not been dispatched yet.
+     */
+    private static final int READ_RESULT_FINISHED_WITH_EVENTS = 0;
+
+    /**
+     * Returned by readEvents() to signify the total absence of events
+     * on any of the Wayland display queues.
+     */
+    private static final int READ_RESULT_FINISHED_NO_EVENTS = 1;
+
+    /**
+     * Returned by readEvents() to signify the absence of *new* events
+     * on the default Wayland display queue. The existing events
+     * should better be dispatched prior to calling readEvents() again.
+     */
+    private static final int READ_RESULT_NO_NEW_EVENTS = 2;
+
+    /**
+     * Returned by readEvents() in case of an error condition like
+     * disappearing of the Wayland display. Errors not specifically
+     * related to Wayland are reported via an exception.
+     */
+    private static final int READ_RESULT_ERROR = 3;
+
+    private static native void initIDs();
+
+    static {
+        if (!GraphicsEnvironment.isHeadless()) {
+            initIDs();
+        }
+    }
+
+    public WLToolkit() {
+        Thread toolkitThread = new Thread(this, "AWT-Wayland");
+        toolkitThread.setDaemon(true);
+        toolkitThread.start();
+
+        final Thread toolkitSystemThread = new Thread(this::dispatchNonDefaultQueues, "AWT-Wayland-system-dispatcher");
+        toolkitSystemThread.setDaemon(true);
+        toolkitSystemThread.start();
+    }
+
+    @Override
+    public ButtonPeer createButton(Button target) {
+        ButtonPeer peer = new WLButtonPeer(target);
+        targetCreatedPeer(target, peer);
+        return peer;
+    }
+
+    @Override
+    public FramePeer createLightweightFrame(LightweightFrame target) {
+        FramePeer peer = new WLLightweightFramePeer(target);
+        targetCreatedPeer(target, peer);
+        return peer;
+    }
+
+    @Override
+    public FramePeer createFrame(Frame target) {
+        FramePeer peer = new WLFramePeer(target);
+        targetCreatedPeer(target, peer);
+        return peer;
+    }
+
+    /**
+     * Wayland events coming to queues other that the default are handled here.
+     * The code is executed on a separate thread and must not call any user code.
+     */
+    private void dispatchNonDefaultQueues() {
+        dispatchNonDefaultQueuesImpl(); // does not return until error or server disconnect
+    }
+
+    @Override
+    public void run() {
+        while(true) {
+            int result = readEvents();
+            // TODO: the result of the very first call can theoretically be READ_RESULT_NO_NEW_EVENTS
+            // and that assumes we already have a dispatcher queued, which is initially not so.
+            // Can be solved by queueing dispatch once in the very beginning (?)
+
+            // There's also a problem where we can start waiting in the READ_RESULT_NO_NEW_EVENTS branch,
+            // but at the same time dispatch has just completed. So on the one hand we are ready for
+            // more events, but on the other we will wait for 50ms before getting them. This may hinder
+            // the responsiveness.
+
+            if (result == READ_RESULT_ERROR) {
+                // TODO: display disconnect handling here?
+                break;
+            } else if (result == READ_RESULT_FINISHED_WITH_EVENTS) {
+                SunToolkit.postEvent(AppContext.getAppContext(),
+                        new PeerEvent(this, () -> {
+                            dispatchEventsOnEDT();
+                            synchronized (WLToolkit.this) {
+                                // Finally, processed the entire events queue, can ask for more now.
+                                WLToolkit.this.notifyAll();
+                            }
+                        }, PeerEvent.ULTIMATE_PRIORITY_EVENT));
+            } else if (result == READ_RESULT_NO_NEW_EVENTS) {
+                synchronized (WLToolkit.this) {
+                    try {
+                        // Give the EDT an opportunity to process the current event queue
+                        // (see above) before requesting yet another dispatch
+                        // on the very next loop iteration. That iteration may exit with
+                        // the same READ_RESULT_NO_NEW_EVENTS thus creating a busy loop
+                        // until EDT finally gets around to dispatching the existing queue.
+                        WLToolkit.this.wait(WAYLAND_DISPLAY_INTERACTION_TIMEOUT_MS);
+                    } catch (InterruptedException ignored) {
+                    }
+                }
+            }
+        }
+    }
+
+    @Override
+    public RobotPeer createRobot(GraphicsDevice screen) throws AWTException {
+        if (screen instanceof WLGraphicsDevice) {
+            return new WLRobotPeer((WLGraphicsDevice) screen);
+        }
+        return super.createRobot(screen);
+    }
+
+    @Override
+    public void setDynamicLayout(boolean b) {
+        log.info("Not implemented: WLToolkit.setDynamicLayout()");
+    }
+
+    @Override
+    protected boolean isDynamicLayoutSet() {
+        log.info("Not implemented: WLToolkit.isDynamicLayoutSet()");
+        return false;
+    }
+
+    protected boolean isDynamicLayoutSupported() {
+        log.info("Not implemented: WLToolkit.isDynamicLayoutSupported()");
+        return false;
+    }
+
+    @Override
+    public boolean isDynamicLayoutActive() {
+        return isDynamicLayoutSupported();
+    }
+
+    @Override
+    public FontPeer getFontPeer(String name, int style){
+        log.info("Not implemented: WLToolkit.getFontPeer()");
+        return null;
+    }
+
+    @Override
+    public DragSourceContextPeer createDragSourceContextPeer(DragGestureEvent dge) throws InvalidDnDOperationException {
+        log.info("Not implemented: WLToolkit.createDragSourceContextPeer()");
+        return null;
+    }
+
+    @Override
+    public <T extends DragGestureRecognizer> T
+    createDragGestureRecognizer(Class<T> recognizerClass,
+                    DragSource ds,
+                    Component c,
+                    int srcActions,
+                    DragGestureListener dgl)
+    {
+        log.info("Not implemented: WLToolkit.createDragGestureRecognizer()");
+        return null;
+    }
+
+    @Override
+    public CheckboxMenuItemPeer createCheckboxMenuItem(CheckboxMenuItem target) {
+        log.info("Not implemented: WLToolkit.createCheckboxMenuItem()");
+        return null;
+    }
+
+    @Override
+    public MenuItemPeer createMenuItem(MenuItem target) {
+        log.info("Not implemented: WLToolkit.createMenuItem()");
+        return null;
+    }
+
+    @Override
+    public TextFieldPeer createTextField(TextField target) {
+        log.info("Not implemented: WLToolkit.createTextField()");
+        return null;
+    }
+
+    @Override
+    public LabelPeer createLabel(Label target) {
+        log.info("Not implemented: WLToolkit.createLabel()");
+        return null;
+    }
+
+    @Override
+    public ListPeer createList(java.awt.List target) {
+        log.info("Not implemented: WLToolkit.createList()");
+        return null;
+    }
+
+    @Override
+    public CheckboxPeer createCheckbox(Checkbox target) {
+        log.info("Not implemented: WLToolkit.createCheckbox()");
+        return null;
+    }
+
+    @Override
+    public ScrollbarPeer createScrollbar(Scrollbar target) {
+        log.info("Not implemented: WLToolkit.createScrollbar()");
+        return null;
+    }
+
+    @Override
+    public ScrollPanePeer createScrollPane(ScrollPane target) {
+        log.info("Not implemented: WLToolkit.createScrollPane()");
+        return null;
+    }
+
+    @Override
+    public TextAreaPeer createTextArea(TextArea target) {
+        log.info("Not implemented: WLToolkit.createTextArea()");
+        return null;
+    }
+
+    @Override
+    public ChoicePeer createChoice(Choice target) {
+        log.info("Not implemented: WLToolkit.createChoice()");
+        return null;
+    }
+
+    @Override
+    public CanvasPeer createCanvas(Canvas target) {
+        WLCanvasPeer peer = new WLCanvasPeer(target);
+        targetCreatedPeer(target, peer);
+        return peer;
+    }
+
+    @Override
+    public PanelPeer createPanel(Panel target) {
+        log.info("Not implemented: WLToolkit.createPanel()");
+        return null;
+    }
+
+    @Override
+    public WindowPeer createWindow(Window target) {
+        log.info("Not implemented: WLToolkit.createWindow()");
+        return null;
+    }
+
+    @Override
+    public DialogPeer createDialog(Dialog target) {
+        log.info("Not implemented: WLToolkit.createDialog()");
+        return null;
+    }
+
+    @Override
+    public FileDialogPeer createFileDialog(FileDialog target) {
+        log.info("Not implemented: WLToolkit.createFileDialog()");
+        return null;
+    }
+
+    @Override
+    public MenuBarPeer createMenuBar(MenuBar target) {
+        log.info("Not implemented: WLToolkit.createMenuBar()");
+        return null;
+    }
+
+    @Override
+    public MenuPeer createMenu(Menu target) {
+        log.info("Not implemented: WLToolkit.createMenu()");
+        return null;
+    }
+
+    @Override
+    public PopupMenuPeer createPopupMenu(PopupMenu target) {
+        log.info("Not implemented: WLToolkit.createPopupMenu()");
+        return null;
+    }
+
+    @Override
+    public synchronized MouseInfoPeer getMouseInfoPeer() {
+        log.info("Not implemented: WLToolkit.getMouseInfoPeer()");
+        return null;
+    }
+
+    @Override
+    public KeyboardFocusManagerPeer getKeyboardFocusManagerPeer() throws HeadlessException {
+        return WLKeyboardFocusManagerPeer.getInstance();
+    }
+
+    /**
+     * Returns a new custom cursor.
+     */
+    @Override
+    public Cursor createCustomCursor(Image cursor, Point hotSpot, String name)
+      throws IndexOutOfBoundsException {
+        log.info("Not implemented: WLToolkit.createCustomCursor()");
+        return null;
+    }
+
+    @Override
+    public TrayIconPeer createTrayIcon(TrayIcon target)
+      throws HeadlessException
+    {
+        log.info("Not implemented: WLToolkit.createTrayIcon()");
+        return null;
+    }
+
+    @Override
+    public SystemTrayPeer createSystemTray(SystemTray target) throws HeadlessException {
+        log.info("Not implemented: WLToolkit.createSystemTray()");
+        return null;
+    }
+
+    @Override
+    public boolean isTraySupported() {
+        log.info("Not implemented: WLToolkit.isTraySupported()");
+        return false;
+    }
+
+    @Override
+    public DataTransferer getDataTransferer() {
+        log.info("Not implemented: WLToolkit.getDataTransferer()");
+        return null;
+    }
+
+    /**
+     * Returns the supported cursor size
+     */
+    @Override
+    public Dimension getBestCursorSize(int preferredWidth, int preferredHeight) {
+        log.info("Not implemented: WLToolkit.getBestCursorSize()");
+        return null;
+    }
+
+    @Override
+    public int getMaximumCursorColors() {
+        return 2;  // Black and white.
+    }
+
+    @Override
+    public Map<TextAttribute, ?> mapInputMethodHighlight( InputMethodHighlight highlight) {
+        log.info("Not implemented: WLToolkit.mapInputMethodHighlight()");
+        return null;
+    }
+    @Override
+    public boolean getLockingKeyState(int key) {
+        log.info("Not implemented: WLToolkit.getLockingKeyState()");
+        return false;
+    }
+
+    @Override
+    public  Clipboard getSystemClipboard() {
+        log.info("Not implemented: WLToolkit.getSystemClipboard()");
+        return null;
+    }
+
+    @Override
+    public Clipboard getSystemSelection() {
+        log.info("Not implemented: WLToolkit.getSystemSelection()");
+        return null;
+    }
+
+    @Override
+    public void beep() {
+        log.info("Not implemented: WLToolkit.beep()");
+    }
+
+    @Override
+    public PrintJob getPrintJob(final Frame frame, final String doctitle,
+                                final Properties props) {
+        log.info("Not implemented: WLToolkit.getPrintJob()");
+        return null;
+    }
+
+    @Override
+    public PrintJob getPrintJob(final Frame frame, final String doctitle,
+                final JobAttributes jobAttributes,
+                final PageAttributes pageAttributes)
+    {
+        log.info("Not implemented: WLToolkit.getPrintJob()");
+        return null;
+    }
+
+    @Override
+    public int getScreenResolution() {
+        log.info("Not implemented: WLToolkit.getScreenResolution()");
+        return 0;
+    }
+
+    /**
+     * Returns a new input method adapter descriptor for native input methods.
+     */
+    @Override
+    public InputMethodDescriptor getInputMethodAdapterDescriptor() {
+        log.info("Not implemented: WLToolkit.getInputMethodAdapterDescriptor()");
+        return null;
+    }
+
+    /**
+     * Returns whether enableInputMethods should be set to true for peered
+     * TextComponent instances on this platform. True by default.
+     */
+    @Override
+    public boolean enableInputMethodsForTextComponent() {
+        log.info("Not implemented: WLToolkit.enableInputMethodsForTextComponent()");
+        return true;
+    }
+
+
+    @Override
+    public boolean isFrameStateSupported(int state)
+      throws HeadlessException
+    {
+        log.info("Not implemented: WLToolkit.isFrameStateSupported()");
+        return false;
+    }
+
+    @Override
+    protected void initializeDesktopProperties() {
+        log.info("Not implemented: WLToolkit.initializeDesktopProperties()");
+    }
+
+    @Override
+    public int getNumberOfButtons(){
+        log.info("Not implemented: WLToolkit.getNumberOfButtons()");
+        return 0;
+    }
+
+    @Override
+    protected Object lazilyLoadDesktopProperty(String name) {
+        log.info("Not implemented: WLToolkit.lazilyLoadDesktopProperty()");
+        return null;
+    }
+
+    @Override
+    public synchronized void addPropertyChangeListener(String name, PropertyChangeListener pcl) {
+        log.info("Not implemented: WLToolkit.addPropertyChangeListener()");
+    }
+
+    /**
+     * @see SunToolkit#needsXEmbedImpl
+     */
+    @Override
+    protected boolean needsXEmbedImpl() {
+        log.info("Not implemented: WLToolkit.needsXEmbedImpl()");
+        return false;
+    }
+
+    @Override
+    public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
+        log.info("Not implemented: WLToolkit.isModalityTypeSupported()");
+        return false;
+    }
+
+    @Override
+    public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
+        log.info("Not implemented: WLToolkit.isModalExclusionTypeSupported()");
+        return false;
+    }
+
+    @Override
+    public boolean isAlwaysOnTopSupported() {
+        log.info("Not implemented: WLToolkit.isAlwaysOnTopSupported()");
+        return false;
+    }
+
+    @Override
+    public boolean useBufferPerWindow() {
+        log.info("Not implemented: WLToolkit.useBufferPerWindow()");
+        return false;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    @Override
+    protected boolean syncNativeQueue(long timeout) {
+        log.info("Not implemented: WLToolkit.syncNativeQueue()");
+        return false;
+    }
+
+    @Override
+    public void grab(Window w) {
+        log.info("Not implemented: WLToolkit.grab()");
+    }
+
+    @Override
+    public void ungrab(Window w) {
+        log.info("Not implemented: WLToolkit.ungrab()");
+    }
+    /**
+     * Returns if the java.awt.Desktop class is supported on the current
+     * desktop.
+     * <p>
+     * The methods of java.awt.Desktop class are supported on the Gnome desktop.
+     * Check if the running desktop is Gnome by checking the window manager.
+     */
+    @Override
+    public boolean isDesktopSupported(){
+        log.info("Not implemented: WLToolkit.isDesktopSupported()");
+        return false;
+    }
+
+    @Override
+    public DesktopPeer createDesktopPeer(Desktop target){
+        log.info("Not implemented: WLToolkit.createDesktopPeer()");
+        return null;
+    }
+
+    @Override
+    public boolean isTaskbarSupported(){
+        log.info("Not implemented: WLToolkit.isTaskbarSupported()");
+        return false;
+    }
+
+    @Override
+    public TaskbarPeer createTaskbarPeer(Taskbar target){
+        log.info("Not implemented: WLToolkit.createTaskbarPeer()");
+        return null;
+    }
+
+    @Override
+    public boolean areExtraMouseButtonsEnabled() throws HeadlessException {
+        log.info("Not implemented: WLToolkit.areExtraMouseButtonsEnabled()");
+        return false;
+    }
+
+    @Override
+    public boolean isWindowOpacitySupported() {
+        log.info("Not implemented: WLToolkit.isWindowOpacitySupported()");
+        return false;
+    }
+
+    @Override
+    public boolean isWindowShapingSupported() {
+        log.info("Not implemented: WLToolkit.isWindowShapingSupported()");
+        return false;
+    }
+
+    @Override
+    public boolean isWindowTranslucencySupported() {
+        log.info("Not implemented: WLToolkit.isWindowTranslucencySupported()");
+        return false;
+    }
+
+    @Override
+    public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
+        log.info("Not implemented: WLToolkit.isWindowTranslucencySupported()");
+        return false;
+    }
+
+    @Override
+    public void sync() {
+        flushImpl();
+    }
+
+    private native int readEvents();
+    private native void dispatchEventsOnEDT();
+    private native void flushImpl();
+    private native void dispatchNonDefaultQueuesImpl();
+
+    protected static void targetDisposedPeer(Object target, Object peer) {
+        SunToolkit.targetDisposedPeer(target, peer);
+    }
+
+    static void postEvent(AWTEvent event) {
+        SunToolkit.postEvent(AppContext.getAppContext(), event);
+    }
+}

src/java.desktop/unix/classes/sun/java2d/UnixSurfaceManagerFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -28,10 +28,12 @@ package sun.java2d;
 
 import java.awt.GraphicsConfiguration;
 
+import sun.awt.X11GraphicsConfig;
 import sun.awt.image.SunVolatileImage;
 import sun.awt.image.VolatileSurfaceManager;
 import sun.java2d.opengl.GLXGraphicsConfig;
 import sun.java2d.opengl.GLXVolatileSurfaceManager;
+import sun.java2d.wl.WLVolatileSurfaceManager;
 import sun.java2d.x11.X11VolatileSurfaceManager;
 import sun.java2d.xr.*;
 
@@ -60,8 +62,10 @@ public class UnixSurfaceManagerFactory extends SurfaceManagerFactory {
             return new GLXVolatileSurfaceManager(vImg, context);
         } else if(gc instanceof XRGraphicsConfig) {
             return new XRVolatileSurfaceManager(vImg, context);
-        }else {
+        } else if (gc instanceof X11GraphicsConfig){
             return new X11VolatileSurfaceManager(vImg, context);
+        } else {
+            return new WLVolatileSurfaceManager(vImg, context);
         }
     }
 

src/java.desktop/unix/classes/sun/java2d/wl/WLSurfaceData.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.java2d.wl;
+
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
+import java.awt.Rectangle;
+import java.awt.image.ColorModel;
+import java.awt.image.Raster;
+import sun.awt.image.SunVolatileImage;
+import sun.awt.wl.WLComponentPeer;
+import sun.awt.wl.WLGraphicsConfig;
+import sun.java2d.SurfaceData;
+import sun.java2d.loops.SurfaceType;
+import sun.util.logging.PlatformLogger;
+
+public class WLSurfaceData extends SurfaceData {
+
+  private static final PlatformLogger log = PlatformLogger.getLogger("sun.java2d.wl.WLSurfaceData");
+  private final WLComponentPeer peer;
+  private final WLGraphicsConfig graphicsConfig;
+  private final int depth;
+
+
+  public native void initSurface(WLComponentPeer peer, int rgb, int width, int height);
+  protected native void initOps(WLComponentPeer peer, WLGraphicsConfig gc, int depth);
+
+  protected WLSurfaceData(WLComponentPeer peer,
+                          WLGraphicsConfig gc,
+                          SurfaceType sType,
+                          ColorModel cm)
+  {
+    super(sType, cm);
+    this.peer = peer;
+    this.graphicsConfig = gc;
+    this.depth = cm.getPixelSize();
+    initOps(peer, graphicsConfig, depth);
+  }
+
+  /**
+   * Method for instantiating a Window SurfaceData
+   */
+  public static WLSurfaceData createData(WLComponentPeer peer) {
+    WLGraphicsConfig gc = getGC(peer);
+    return new WLSurfaceData(peer, gc, gc.getSurfaceType(), peer.getColorModel());
+  }
+
+
+  public static WLGraphicsConfig getGC(WLComponentPeer peer) {
+    if (peer != null) {
+      return (WLGraphicsConfig) peer.getGraphicsConfiguration();
+    } else {
+      GraphicsEnvironment env =
+          GraphicsEnvironment.getLocalGraphicsEnvironment();
+      GraphicsDevice gd = env.getDefaultScreenDevice();
+      return (WLGraphicsConfig)gd.getDefaultConfiguration();
+    }
+  }
+  @Override
+  public SurfaceData getReplacement() {
+    return null;
+  }
+
+  @Override
+  public GraphicsConfiguration getDeviceConfiguration() {
+    return null;
+  }
+
+  @Override
+  public Raster getRaster(int x, int y, int w, int h) {
+    return null;
+  }
+
+  @Override
+  public Rectangle getBounds() {
+    Rectangle r = peer.getTarget().getBounds();
+    r.x = r.y = 0;
+    return r;
+  }
+
+  @Override
+  public Object getDestination() {
+    return peer.getTarget();
+  }
+
+  public static boolean isAccelerationEnabled() {
+    return false;
+  }
+
+  public static SurfaceData createData(WLGraphicsConfig gc, int width, int height, ColorModel cm,
+                                       SunVolatileImage vImg, long drawable, int opaque,
+                                       boolean b) {
+    log.info("Not implemented: WLSurfaceData.createData(WLGraphicsConfig,int,int,ColorModel," +
+                                                       "SunVolatileImage,long,int,boolean)");
+    return null;
+  }
+
+}

src/java.desktop/unix/classes/sun/java2d/wl/WLVolatileSurfaceManager.java

@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.java2d.wl;
+
+import java.awt.GraphicsConfiguration;
+import java.awt.ImageCapabilities;
+import java.awt.Transparency;
+import java.awt.image.ColorModel;
+import sun.awt.wl.WLGraphicsConfig;
+import sun.awt.image.SunVolatileImage;
+import sun.awt.image.VolatileSurfaceManager;
+import sun.java2d.SurfaceData;
+
+/**
+ * X11 platform implementation of the VolatileSurfaceManager class.
+ * The class attempts to create and use a pixmap-based SurfaceData
+ * object (X11PixmapSurfaceData).
+ * If this object cannot be created or re-created as necessary, the
+ * class falls back to a system memory based SurfaceData object
+ * (BufImgSurfaceData) that will be used until the accelerated
+ * SurfaceData can be restored.
+ */
+public class WLVolatileSurfaceManager extends VolatileSurfaceManager {
+
+    private boolean accelerationEnabled;
+
+    public WLVolatileSurfaceManager(SunVolatileImage vImg, Object context) {
+        super(vImg, context);
+
+        // We only accelerated opaque vImages currently
+        accelerationEnabled = WLSurfaceData.isAccelerationEnabled() &&
+            (vImg.getTransparency() == Transparency.OPAQUE);
+
+        if ((context != null) && !accelerationEnabled) {
+            // if we're wrapping a backbuffer drawable, we must ensure that
+            // the accelerated surface is initialized up front, regardless
+            // of whether acceleration is enabled. But we need to set
+            // the  accelerationEnabled field to true to reflect that this
+            // SM is actually accelerated.
+            accelerationEnabled = true;
+            sdAccel = initAcceleratedSurface();
+            sdCurrent = sdAccel;
+
+            if (sdBackup != null) {
+                // release the system memory backup surface, as we won't be
+                // needing it in this case
+                sdBackup = null;
+            }
+        }
+    }
+
+    protected boolean isAccelerationEnabled() {
+        return accelerationEnabled;
+    }
+
+    /**
+     * Create a pixmap-based SurfaceData object
+     */
+    protected SurfaceData initAcceleratedSurface() {
+        SurfaceData sData;
+
+        try {
+            WLGraphicsConfig gc = (WLGraphicsConfig)vImg.getGraphicsConfig();
+            ColorModel cm = gc.getColorModel();
+            long drawable = 0;
+            if (context instanceof Long) {
+                drawable = ((Long)context).longValue();
+            }
+            sData = WLSurfaceData.createData(gc,
+                                              vImg.getWidth(),
+                                              vImg.getHeight(),
+                                              cm, vImg, drawable,
+                                              Transparency.OPAQUE,
+                                              false);
+        } catch (NullPointerException ex) {
+            sData = null;
+        } catch (OutOfMemoryError er) {
+            sData = null;
+        }
+
+        return sData;
+    }
+
+    protected boolean isConfigValid(GraphicsConfiguration gc) {
+        // REMIND: we might be too paranoid here, requiring that
+        // the GC be exactly the same as the original one.  The
+        // real answer is one that guarantees that pixmap copies
+        // will be correct (which requires like bit depths and
+        // formats).
+        return ((gc == null) || (gc == vImg.getGraphicsConfig()));
+    }
+
+    /**
+     * Need to override the default behavior because Pixmaps-based
+     * images are accelerated but not volatile.
+     */
+    @Override
+    public ImageCapabilities getCapabilities(GraphicsConfiguration gc) {
+        if (isConfigValid(gc) && isAccelerationEnabled()) {
+            // accelerated but not volatile
+            return new ImageCapabilities(true);
+        }
+        // neither accelerated nor volatile
+        return new ImageCapabilities(false);
+    }
+}

src/java.desktop/unix/native/common/awt/fontpath.c

@@ -96,7 +96,7 @@ typedef struct {
     int  num;
 } fDirRecord, *fDirRecordPtr;
 
-#ifndef HEADLESS
+#ifdef XAWT
 
 /*
  * Returns True if display is local, False of it's remote.
@@ -194,7 +194,7 @@ static char **getX11FontPath ()
 }
 
 
-#endif /* !HEADLESS */
+#endif /* XAWT */
 
 #if defined(__linux__)
 /* from awt_LoadLibrary.c */
@@ -334,7 +334,7 @@ static char *getPlatformFontPathChars(JNIEnv *env, jboolean noType1, jboolean is
      * this code could throw an exception and the fontpath would fail to
      * be initialised.
      */
-#ifndef HEADLESS
+#ifdef XAWT
     if (isX11) { // The following only works in an x11 environment.
 #if defined(__linux__)
     /* There's no headless build on linux ... */
@@ -356,7 +356,7 @@ static char *getPlatformFontPathChars(JNIEnv *env, jboolean noType1, jboolean is
     }
 #endif
     }
-#endif /* !HEADLESS */
+#endif /* XAWT */
     path = mergePaths(fcdirs, x11dirs, knowndirs, noType1);
     if (fcdirs != NULL) {
         char **p = fcdirs;

src/java.desktop/unix/native/common/java2d/wl/WLSurfaceData.c

@@ -0,0 +1,289 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+#include <wayland-client.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <pthread.h>
+#include <jni.h>
+#include "jni_util.h"
+#include "Trace.h"
+#include "WLSurfaceData.h"
+extern struct wl_shm *wl_shm;
+//#undef HEADLESS
+void logWSDOp(char* str, void* p, jint lockFlags) {
+    J2dTrace2(J2D_TRACE_INFO, "%s: %p, ", str, p);
+    J2dTrace7(J2D_TRACE_INFO, "[%c%c%c%c%c%c%c]",
+              (lockFlags&SD_LOCK_READ) ? 'R' : '.',
+              (lockFlags&SD_LOCK_WRITE) ? 'W' : '.',
+              (lockFlags&SD_LOCK_LUT) ? 'L' : '.',
+              (lockFlags&SD_LOCK_INVCOLOR) ? 'C' : '.',
+              (lockFlags&SD_LOCK_INVGRAY) ? 'G' : '.',
+              (lockFlags&SD_LOCK_FASTEST) ? 'F' : '.',
+              (lockFlags&SD_LOCK_PARTIAL) ? 'P' : '.');
+    J2dTrace(J2D_TRACE_INFO, "\n");
+}
+
+typedef struct _WLSDPrivate {
+    jint                lockFlags;
+    struct wl_buffer*   wlBuffer;
+} WLSDPrivate;
+
+JNIEXPORT WLSDOps * JNICALL
+WLSurfaceData_GetOps(JNIEnv *env, jobject sData)
+{
+#ifdef HEADLESS
+    return NULL;
+#else
+    SurfaceDataOps *ops = SurfaceData_GetOps(env, sData);
+    if (ops == NULL) {
+        SurfaceData_ThrowInvalidPipeException(env, "not an valid WLSurfaceData");
+    }
+    return (WLSDOps *) ops;
+#endif /* !HEADLESS */
+}
+#ifndef HEADLESS
+static void
+wl_buffer_release(void *data, struct wl_buffer *wl_buffer) {
+    /* Sent by the compositor when it's no longer using this buffer */
+    wl_buffer_destroy(wl_buffer);
+}
+
+static const struct wl_buffer_listener wl_buffer_listener = {
+        .release = wl_buffer_release,
+};
+
+
+/* Shared memory support code (from  https://wayland-book.com/) */
+static void randname(char *buf) {
+    struct timespec ts;
+    clock_gettime(CLOCK_REALTIME, &ts);
+    long r = ts.tv_nsec;
+    for (int i = 0; i < 6; ++i) {
+        buf[i] = 'A' + (r & 15) + (r & 16) * 2;
+        r >>= 5;
+    }
+}
+
+static int create_shm_file() {
+    int retries = 100;
+    do {
+        char name[] = "/wl_shm-XXXXXX";
+        randname(name + sizeof(name) - 7);
+        --retries;
+        int fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600);
+        if (fd >= 0) {
+            shm_unlink(name);
+            return fd;
+        }
+    } while (retries > 0 && errno == EEXIST);
+    return -1;
+}
+
+static int allocate_shm_file(size_t size) {
+    int fd = create_shm_file();
+    if (fd < 0)
+        return -1;
+    int ret;
+    do {
+        ret = ftruncate(fd, size);
+    } while (ret < 0 && errno == EINTR);
+    if (ret < 0) {
+        close(fd);
+        return -1;
+    }
+    return fd;
+}
+
+#endif
+
+/*
+ * Class:     sun_java2d_wl_WLSurfaceData
+ * Method:    initSurface
+ * Signature: (IIIJ)V
+ */
+JNIEXPORT void JNICALL
+Java_sun_java2d_wl_WLSurfaceData_initSurface(JNIEnv *env, jobject wsd,
+                                             jobject peer,
+                                             jint rgb,
+                                             jint width, jint height)
+{
+#ifndef HEADLESS
+    J2dTrace6(J2D_TRACE_INFO, "WLSurfaceData_initSurface: %dx%d, rgba=(%d,%d,%d,%d)\n",
+              width, height, rgb&0xff, (rgb>>8)&0xff, (rgb>>16)&0xff, (rgb>>24)&0xff);
+    WLSDOps *wsdo = (WLSDOps*)SurfaceData_GetOps(env, wsd);
+    if (wsdo == NULL) {
+        return;
+    }
+    jboolean hasException;
+    if (!wsdo->wlSurface) {
+        wsdo->wlSurface = JNU_CallMethodByName(env, &hasException, peer, "getWLSurface", "()J").j;
+    }
+    if (width <= 0) {
+        width = 1;
+    }
+    if (height <= 0) {
+        height = 1;
+    }
+    int stride = width * 4;
+    int size = stride * height;
+
+    wsdo->fd = allocate_shm_file(size);
+    if (wsdo->fd == -1) {
+        return;
+    }
+    wsdo->data = (uint32_t *) (mmap(NULL, size,
+                                    PROT_READ | PROT_WRITE, MAP_SHARED, wsdo->fd, 0));
+    if (wsdo->data == MAP_FAILED) {
+        close(wsdo->fd);
+        return;
+    }
+
+    wsdo->dataSize = size;
+    wsdo->width = width;
+    wsdo->height = height;
+
+    for (int i = 0; i < height*width; ++i) {
+        wsdo->data[i] = rgb;
+    }
+
+    wsdo->wlShmPool = (jlong)wl_shm_create_pool(wl_shm, wsdo->fd, size);
+    wsdo->wlBuffer = (jlong) wl_shm_pool_create_buffer(
+            (struct wl_shm_pool*)wsdo->wlShmPool, 0, width, height, stride, WL_SHM_FORMAT_XRGB8888);
+
+    wl_surface_attach((struct wl_surface*)wsdo->wlSurface, (struct wl_buffer*)wsdo->wlBuffer, 0, 0);
+    wl_surface_commit((struct wl_surface*)wsdo->wlSurface);
+#endif /* !HEADLESS */
+}
+
+/**
+ * This is the implementation of the general surface LockFunc defined in
+ * SurfaceData.h.
+ */
+jint
+WLSD_Lock(JNIEnv *env,
+           SurfaceDataOps *ops,
+           SurfaceDataRasInfo *pRasInfo,
+           jint lockflags)
+{
+#ifndef HEADLESS
+    WLSDOps *wlso = (WLSDOps*)ops;
+    logWSDOp("WLSD_Lock", wlso, lockflags);
+    pthread_mutex_lock(&wlso->lock);
+    WLSDPrivate *priv = (WLSDPrivate *) &(pRasInfo->priv);
+    priv->lockFlags = lockflags;
+
+    if (priv->lockFlags & SD_LOCK_WRITE) {
+        pRasInfo->rasBase = wlso->data;
+        pRasInfo->pixelStride = 4;
+        pRasInfo->pixelBitOffset = 0;
+        pRasInfo->scanStride = 4 * wlso->width;
+    }
+#endif
+    return SD_SUCCESS;
+}
+
+
+static void WLSD_GetRasInfo(JNIEnv *env,
+                             SurfaceDataOps *ops,
+                             SurfaceDataRasInfo *pRasInfo)
+{
+#ifndef HEADLESS
+    WLSDPrivate *priv = (WLSDPrivate *) &(pRasInfo->priv);
+    WLSDOps *wlso = (WLSDOps*)ops;
+    logWSDOp("WLSD_GetRasInfo", wlso, priv->lockFlags);
+    if (priv->lockFlags & SD_LOCK_WRITE) {
+        wl_surface_damage ((struct wl_surface*)wlso->wlSurface, pRasInfo->bounds.x1, pRasInfo->bounds.y1,
+                           pRasInfo->bounds.x2 - pRasInfo->bounds.x1, pRasInfo->bounds.y2 - pRasInfo->bounds.y1);
+    }
+#endif
+}
+
+static void WLSD_Unlock(JNIEnv *env,
+                         SurfaceDataOps *ops,
+                         SurfaceDataRasInfo *pRasInfo)
+{
+#ifndef HEADLESS
+    WLSDOps *wsdo = (WLSDOps*)ops;
+    J2dTrace1(J2D_TRACE_INFO, "WLSD_Unlock: %p\n", wsdo);
+    wl_surface_commit((struct wl_surface*)wsdo->wlSurface);
+    pthread_mutex_unlock(&wsdo->lock);
+#endif
+}
+
+static void WLSD_Dispose(JNIEnv *env, SurfaceDataOps *ops)
+{
+#ifndef HEADLESS
+    /* ops is assumed non-null as it is checked in SurfaceData_DisposeOps */
+    J2dTrace1(J2D_TRACE_INFO, "WLSD_Dispose %p\n", ops);
+    WLSDOps *wsdo = (WLSDOps*)ops;
+    if (wsdo->wlSurface != 0) {
+        close(wsdo->fd);
+        wsdo->fd = 0;
+        munmap(wsdo->data, wsdo->dataSize);
+        wl_shm_pool_destroy((struct wl_shm_pool *) wsdo->wlShmPool);
+        wl_buffer_add_listener((struct wl_buffer *) wsdo->wlBuffer, &wl_buffer_listener, NULL);
+    } else {
+        J2dTrace(J2D_TRACE_INFO, "WLSD_Dispose: wlSurface == 0\n");
+    }
+    pthread_mutex_destroy(&wsdo->lock);
+#endif
+}
+/*
+ * Class:     sun_java2d_wl_WLSurfaceData
+ * Method:    initOps
+ * Signature: (Ljava/lang/Object;Ljava/lang/Object;I)V
+ */
+JNIEXPORT void JNICALL
+Java_sun_java2d_wl_WLSurfaceData_initOps(JNIEnv *env, jobject wsd,
+                                         jobject peer,
+                                         jobject graphicsConfig, jint depth)
+{
+#ifndef HEADLESS
+
+    WLSDOps *wsdo = (WLSDOps*)SurfaceData_InitOps(env, wsd, sizeof(WLSDOps));
+    J2dTrace1(J2D_TRACE_INFO, "WLSurfaceData_initOps: %p\n", wsdo);
+    jboolean hasException;
+    if (wsdo == NULL) {
+        JNU_ThrowOutOfMemoryError(env, "Initialization of SurfaceData failed.");
+        return;
+    }
+    wsdo->sdOps.Lock = WLSD_Lock;
+    wsdo->sdOps.Unlock = WLSD_Unlock;
+    wsdo->sdOps.GetRasInfo = WLSD_GetRasInfo;
+    wsdo->sdOps.Dispose = WLSD_Dispose;
+
+    wsdo->wlSurface = 0;
+    wsdo->bgPixel = 0;
+    wsdo->isBgInitialized = JNI_FALSE;
+    pthread_mutex_init(&wsdo->lock, NULL);
+
+#endif /* !HEADLESS */
+}

src/java.desktop/unix/native/common/java2d/wl/WLSurfaceData.h

@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "SurfaceData.h"
+
+typedef struct _WLSDOps WLSDOps;
+
+struct _WLSDOps {
+    SurfaceDataOps      sdOps;
+    jboolean            invalid;
+    jobject             peer;
+    jlong               wlSurface;
+    jlong               wlBuffer;
+    jlong               wlShmPool;
+    int                 fd;
+    uint32_t            *data;
+    jint                dataSize;
+    jint                width;
+    jint                height;
+    jint                bgPixel;
+    jint                pixelStride;
+    pthread_mutex_t     lock;
+    jboolean            isBgInitialized;
+};
+
+/*
+ * This function returns a pointer to a native WLSDOps structure
+ * for accessing the indicated WL SurfaceData Java object.  It
+ * verifies that the indicated SurfaceData object is an instance
+ * of WLSurfaceData before returning and will return NULL if the
+ * wrong SurfaceData object is being accessed.  This function will
+ * throw the appropriate Java exception if it returns NULL so that
+ * the caller can simply return.
+ *
+ * Note to callers:
+ *      This function uses JNI methods so it is important that the
+ *      caller not have any outstanding GetPrimitiveArrayCritical or
+ *      GetStringCritical locks which have not been released.
+ *
+ *      The caller may continue to use JNI methods after this method
+ *      is called since this function will not leave any outstanding
+ *      JNI Critical locks unreleased.
+ */
+JNIEXPORT WLSDOps * JNICALL
+WLSurfaceData_GetOps(JNIEnv *env, jobject sData);

src/java.desktop/unix/native/libawt/awt/awt_LoadLibrary.c

@@ -31,7 +31,7 @@
 #include <jni_util.h>
 #include <jvm.h>
 #include "gdefs.h"
-
+#include "sun_awt_PlatformGraphicsInfo.h"
 #include <sys/param.h>
 #include <sys/utsname.h>
 
@@ -79,6 +79,34 @@ JNIEXPORT jboolean JNICALL AWTIsHeadless() {
     return isHeadless;
 }
 
+JNIEXPORT jint JNICALL AWTGetToolkitID() {
+    static JNIEnv *env = NULL;
+    static jint toolkitID;
+    jmethodID toolkitIDFn;
+    jclass platformGraphicsInfoClass;
+
+    if (env == NULL) {
+        env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
+        platformGraphicsInfoClass = (*env)->FindClass(env,
+                                             "sun/awt/PlatformGraphicsInfo");
+        if (platformGraphicsInfoClass == NULL) {
+            return 0;
+        }
+        toolkitIDFn = (*env)->GetStaticMethodID(env,
+                                                platformGraphicsInfoClass, "getToolkitID", "()I");
+        if (toolkitIDFn == NULL) {
+            return 0;
+        }
+        toolkitID = (*env)->CallStaticBooleanMethod(env, platformGraphicsInfoClass,
+                                                    toolkitIDFn);
+        if ((*env)->ExceptionCheck(env)) {
+            (*env)->ExceptionClear(env);
+            return JNI_TRUE;
+        }
+    }
+    return toolkitID;
+}
+
 #define CHECK_EXCEPTION_FATAL(env, message) \
     if ((*env)->ExceptionCheck(env)) { \
         (*env)->ExceptionClear(env); \
@@ -94,6 +122,7 @@ JNIEXPORT jboolean JNICALL AWTIsHeadless() {
   #define DEFAULT_PATH LWAWT_PATH
 #else
   #define XAWT_PATH "/libawt_xawt.so"
+  #define WLAWT_PATH "/libawt_wlawt.so"
   #define DEFAULT_PATH XAWT_PATH
   #define HEADLESS_PATH "/libawt_headless.so"
 #endif
@@ -109,6 +138,7 @@ AWT_OnLoad(JavaVM *vm, void *reserved)
     struct utsname name;
     JNIEnv *env = (JNIEnv *)JNU_GetEnv(vm, JNI_VERSION_1_2);
     void *v;
+    jint tkID = 0;
 
     if (awtHandle != NULL) {
         /* Avoid several loading attempts */
@@ -128,10 +158,16 @@ AWT_OnLoad(JavaVM *vm, void *reserved)
      * loading appropriate awt library, i.e. libawt_xawt or libawt_headless
      */
 
+    tkID = AWTGetToolkitID();
+
 #ifdef MACOSX
         tk = LWAWT_PATH;
 #else
-        tk = XAWT_PATH;
+        if (tkID == sun_awt_PlatformGraphicsInfo_TK_WAYLAND) {
+            tk = WLAWT_PATH;
+        } else {
+            tk = XAWT_PATH;
+        }
 #endif
 
 #ifndef MACOSX

src/java.desktop/unix/native/libawt_wlawt/WLComponentPeer.c

@@ -0,0 +1,207 @@
+/*
+ * Copyright (c) 2021, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <jni.h>
+#include <Trace.h>
+
+#include "jni_util.h"
+#include "WLToolkit.h"
+#include "WLRobotPeer.h"
+
+#ifdef WAKEFIELD_ROBOT
+#include "wakefield-client-protocol.h"
+#endif
+
+jfieldID nativePtrID;
+
+struct WLFrame {
+    jobject nativeFramePeer; // weak reference
+    struct wl_surface *wl_surface;
+    struct xdg_surface *xdg_surface;
+    struct WLFrame *parent;
+    struct xdg_positioner *xdg_positioner;
+    jboolean toplevel;
+    union {
+        struct xdg_toplevel *xdg_toplevel;
+        struct xdg_popup *xdg_popup;
+    };
+};
+
+static void xdg_surface_configure(void *data,
+                                  struct xdg_surface *xdg_surface, uint32_t serial) {
+    xdg_surface_ack_configure(xdg_surface, serial);
+}
+
+static const struct xdg_surface_listener xdg_surface_listener = {
+        .configure = xdg_surface_configure,
+};
+
+static void xdg_toplevel_configure(void *data,
+       			  struct xdg_toplevel *xdg_toplevel,
+       			  int32_t width,
+       			  int32_t height,
+       			  struct wl_array *states) {
+    J2dTrace3(J2D_TRACE_INFO, "WLComponentPeer: xdg_toplevel_configure(%p, %d, %d)\n", xdg_toplevel, width, height);
+}
+
+static void xdg_popup_configure(void *data,
+                  struct xdg_popup *xdg_popup,
+                  int32_t x,
+                  int32_t y,
+                  int32_t width,
+                  int32_t height) {
+    J2dTrace5(J2D_TRACE_INFO, "WLComponentPeer: xdg_popup_configure(%p, %d, %d, %d, %d)\n",
+              xdg_popup, x, y, width, height);
+}
+
+static void xdg_toplevel_close(void *data,
+		      struct xdg_toplevel *xdg_toplevel) {
+    struct WLFrame *frame = (struct WLFrame *) data;
+    JNIEnv *env = getEnv();
+    jobject nativeFramePeer = (*env)->NewLocalRef(env, frame->nativeFramePeer);
+    if (nativeFramePeer) {
+        static jclass wlFramePeerCID = NULL;
+        if (!wlFramePeerCID) {
+            wlFramePeerCID = (*env)->FindClass(env, "sun/awt/wl/WLFramePeer");
+        }
+        static jmethodID postWindowClosingMID = NULL;
+        if (!postWindowClosingMID) {
+            postWindowClosingMID = (*env)->GetMethodID(env, wlFramePeerCID, "postWindowClosing", "()V");
+        }
+        (*env)->CallVoidMethod(env, nativeFramePeer, postWindowClosingMID);
+        (*env)->DeleteLocalRef(env, nativeFramePeer);
+    }
+}
+
+static void xdg_popup_done(void *data,
+                   struct xdg_popup *xdg_popup) {
+    J2dTrace1(J2D_TRACE_INFO, "WLComponentPeer: xdg_popup_done(%p)\n", xdg_popup);
+}
+
+static const struct xdg_toplevel_listener xdg_toplevel_listener = {
+        .configure = xdg_toplevel_configure,
+        .close = xdg_toplevel_close,
+};
+
+static const struct xdg_popup_listener xdg_popup_listener = {
+        .configure = xdg_popup_configure,
+        .popup_done = xdg_popup_done,
+};
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLComponentPeer_initIDs
+        (JNIEnv *env, jclass clazz)
+{
+    CHECK_NULL(nativePtrID = (*env)->GetFieldID(env, clazz, "nativePtr", "J"));
+}
+
+JNIEXPORT jlong JNICALL
+Java_sun_awt_wl_WLComponentPeer_nativeCreateFrame
+  (JNIEnv *env, jobject obj)
+{
+    struct WLFrame *frame = (struct WLFrame *) malloc(sizeof(struct WLFrame));
+    frame->nativeFramePeer = (*env)->NewWeakGlobalRef(env, obj);
+    frame->wl_surface = NULL;
+    frame->xdg_surface = NULL;
+    frame->toplevel = JNI_FALSE;
+    frame->xdg_popup = NULL;
+    return (jlong)frame;
+}
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLComponentPeer_nativeShowComponent
+  (JNIEnv *env, jobject obj, jlong ptr, jlong parentPtr, jint x, jint y)
+{
+    struct WLFrame *frame = (struct WLFrame *) ptr;
+    struct WLFrame *parentFrame = (struct WLFrame*) parentPtr;
+    if (frame->wl_surface) return;
+    frame->wl_surface = wl_compositor_create_surface(wl_compositor);
+    frame->xdg_surface = xdg_wm_base_get_xdg_surface(xdg_wm_base, frame->wl_surface);
+
+    xdg_surface_add_listener(frame->xdg_surface, &xdg_surface_listener, NULL);
+    frame->toplevel = parentFrame == NULL;
+    if (frame->toplevel) {
+        frame->xdg_toplevel = xdg_surface_get_toplevel(frame->xdg_surface);
+        xdg_toplevel_add_listener(frame->xdg_toplevel, &xdg_toplevel_listener, frame);
+    } else {
+        struct xdg_positioner *xdg_positioner =
+                xdg_wm_base_create_positioner(xdg_wm_base);
+        xdg_positioner_set_offset(xdg_positioner, x, y);
+        frame->xdg_popup = xdg_surface_get_popup(frame->xdg_surface, parentFrame->xdg_surface, xdg_positioner);
+        xdg_popup_add_listener(frame->xdg_popup, &xdg_popup_listener, frame);
+    }
+
+    wl_surface_commit(frame->wl_surface);
+    wl_display_roundtrip(wl_display); // this should process 'configure' event, and send 'ack_configure' in response
+#ifdef WAKEFIELD_ROBOT
+        if (wakefield) {
+            // TODO: this doesn't work quite as expected for some reason
+            wakefield_move_surface(wakefield, frame->wl_surface, x, y);
+        }
+#endif
+}
+
+static void doHide(struct WLFrame *frame) {
+    if (frame->wl_surface) {
+        if(frame->toplevel) {
+            xdg_toplevel_destroy(frame->xdg_toplevel);
+        } else {
+            xdg_popup_destroy(frame->xdg_popup);
+        }
+        xdg_surface_destroy(frame->xdg_surface);
+        wl_surface_destroy(frame->wl_surface);
+        frame->wl_surface = NULL;
+        frame->xdg_surface = NULL;
+        frame->xdg_toplevel = NULL;
+        frame->xdg_popup = NULL;
+        frame->toplevel = JNI_FALSE;
+    }
+}
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLComponentPeer_nativeHideFrame
+  (JNIEnv *env, jobject obj, jlong ptr)
+{
+    struct WLFrame *frame = (struct WLFrame *) ptr;
+    doHide(frame);
+}
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLComponentPeer_nativeDisposeFrame
+  (JNIEnv *env, jobject obj, jlong ptr)
+{
+    struct WLFrame *frame = (struct WLFrame *) ptr;
+    doHide(frame);
+    (*env)->DeleteWeakGlobalRef(env, frame->nativeFramePeer);
+    free(frame);
+}
+
+JNIEXPORT jlong JNICALL Java_sun_awt_wl_WLComponentPeer_getWLSurface
+  (JNIEnv *env, jobject obj)
+{
+    return (jlong)((struct WLFrame*)(*env)->GetLongField(env, obj, nativePtrID))->wl_surface;
+}

src/java.desktop/unix/native/libawt_wlawt/WLRobotPeer.c

@@ -0,0 +1,471 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <stdbool.h>
+#include <string.h>
+#include <time.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <pthread.h>
+
+#include <Trace.h>
+#include <jni_util.h>
+
+#include "sun_awt_wl_WLRobotPeer.h"
+#include "WLToolkit.h"
+
+#include "wakefield-client-protocol.h"
+
+#ifdef WAKEFIELD_ROBOT
+struct wakefield      *wakefield;
+struct wl_event_queue *robot_queue;
+#endif
+
+#ifndef HEADLESS
+static struct wl_buffer*
+allocate_buffer(JNIEnv *env, int width, int height, uint32_t **buffer_data, int* size);
+#endif
+
+#ifdef WAKEFIELD_ROBOT
+// These structs are used to transfer data between the thread that made the request
+// and the thread where the event handler was invoked in a race-free manner.
+struct pixel_color_request_t {
+    pthread_mutex_t mutex;
+    pthread_cond_t  cond;
+
+    bool            is_data_available;
+    uint32_t        error_code;
+
+    uint32_t        rgb;
+} pixel_color_request;
+
+struct screen_capture_request_t {
+    pthread_mutex_t mutex;
+    pthread_cond_t  cond;
+
+    bool            is_data_available;
+    uint32_t        error_code;
+} screen_capture_request;
+
+struct surface_location_request_t {
+    pthread_mutex_t mutex;
+    pthread_cond_t  cond;
+
+    bool            is_data_available;
+    uint32_t        error_code;
+
+    int32_t         x;
+    int32_t         y;
+} surface_location_request;
+
+#define WAKEFIELD_REQUEST_INIT(r)       (r).is_data_available = false
+
+#define WAKEFIELD_REQUEST_WAIT_START(r) pthread_mutex_lock(&(r).mutex);              \
+                                        while (!(r).is_data_available) {             \
+                                            pthread_cond_wait(&(r).cond, &(r).mutex);\
+                                        }
+
+#define WAKEFIELD_REQUEST_WAIT_END(r)   pthread_mutex_unlock(&(r).mutex)
+
+#define WAKEFIELD_EVENT_NOTIFY_START(r) pthread_mutex_lock(&(r).mutex)
+
+#define WAKEFIELD_EVENT_NOTIFY_END(r)   (r).is_data_available = true; \
+                                        pthread_cond_broadcast(&(r).cond); \
+                                        pthread_mutex_unlock(&(r).mutex)
+
+static int
+init_mutex_and_cond(JNIEnv *env, pthread_mutex_t *mutex, pthread_cond_t *cond)
+{
+    int rc = 0;
+
+    rc = pthread_mutex_init(mutex, NULL);
+    if (rc != 0) {
+        JNU_ThrowInternalError(env, "pthread_mutex_init() failed");
+        return rc;
+    }
+
+    rc = pthread_cond_init(cond, NULL);
+    if (rc != 0) {
+        JNU_ThrowInternalError(env, "pthread_cond_init() failed");
+        return rc;
+    }
+
+    return rc;
+}
+
+static void
+handle_wakefield_error(JNIEnv *env, uint32_t error_code);
+#endif
+
+static jclass    pointClass;          // java.awt.Point
+static jmethodID pointClassConstrMID; // java.awt.Point(int, int)
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLRobotPeer_initIDs(JNIEnv *env, jclass clazz)
+{
+#ifdef WAKEFIELD_ROBOT
+    int rc = init_mutex_and_cond(env, &pixel_color_request.mutex, &pixel_color_request.cond);
+    if (rc != 0) return;
+
+    rc = init_mutex_and_cond(env, &screen_capture_request.mutex, &screen_capture_request.cond);
+    if (rc != 0) return;
+
+    rc = init_mutex_and_cond(env, &surface_location_request.mutex, &surface_location_request.cond);
+    if (rc != 0) return;
+#endif
+
+    const jclass pointClassLocal = (*env)->FindClass(env, "java/awt/Point");
+    if (pointClassLocal == NULL) {
+        JNU_ThrowInternalError(env, "cannot find class java.awt.Point");
+        return;
+    }
+    pointClass = (*env)->NewGlobalRef(env, pointClassLocal); // never free'ed
+
+    pointClassConstrMID  = (*env)->GetMethodID(env, pointClass, "<init>", "(II)V");
+    if (pointClassConstrMID == NULL) {
+        JNU_ThrowInternalError(env, "cannot find java.awt.Point(int, int)");
+        return;
+    }
+}
+
+JNIEXPORT jboolean JNICALL
+Java_sun_awt_wl_WLRobotPeer_isRobotExtensionPresentImpl(JNIEnv *env, jclass clazz)
+{
+    if (!wl_display) {
+        J2dTrace(J2D_TRACE_ERROR, "WLRobotPeer: isRobotExtensionPresent can't work without a Wayland display\n");
+        return JNI_FALSE;
+    }
+
+#ifdef WAKEFIELD_ROBOT
+    return (wakefield != NULL);
+#else
+    J2dTrace(J2D_TRACE_ERROR, "WLToolkit: robot extension was not enabled at build time \n");
+    return JNI_FALSE;
+#endif
+}
+
+JNIEXPORT jint JNICALL
+Java_sun_awt_wl_WLRobotPeer_getRGBPixelImpl(JNIEnv *env, jclass clazz, jint x, jint y)
+{
+#ifdef WAKEFIELD_ROBOT
+    if (!wakefield) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "no 'wakefield' protocol extension");
+        return 0;
+    }
+
+    WAKEFIELD_REQUEST_INIT(pixel_color_request);
+
+    wakefield_get_pixel_color(wakefield, x, y);
+    wl_flush_to_server(env); // the event will be delivered on a dedicated thread, see wakefield_pixel_color()
+
+    WAKEFIELD_REQUEST_WAIT_START(pixel_color_request);
+    const uint32_t error_code = pixel_color_request.error_code;
+    const uint32_t rgb        = pixel_color_request.rgb;
+    WAKEFIELD_REQUEST_WAIT_END(pixel_color_request);
+
+    if (error_code != WAKEFIELD_ERROR_NO_ERROR) {
+        handle_wakefield_error(env, error_code);
+        return 0;
+    } else {
+        return (jint)rgb;
+    }
+#endif
+    return 0;
+}
+
+JNIEXPORT jobject JNICALL
+Java_sun_awt_wl_WLRobotPeer_getLocationOfWLSurfaceImpl
+        (JNIEnv *env, jclass clazz, jlong wlSurfacePtr)
+{
+#ifdef WAKEFIELD_ROBOT
+    if (!wakefield) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "no 'wakefield' protocol extension");
+        return NULL;
+    }
+
+    WAKEFIELD_REQUEST_INIT(surface_location_request);
+
+    struct wl_surface * const surface = (struct wl_surface*) wlSurfacePtr;
+    wakefield_get_surface_location(wakefield, surface);
+    wl_flush_to_server(env); // the event will be delivered on a dedicated thread, see wakefield_surface_location()
+
+    WAKEFIELD_REQUEST_WAIT_START(surface_location_request);
+    const uint32_t error_code = surface_location_request.error_code;
+    const int32_t           x = surface_location_request.x;
+    const int32_t           y = surface_location_request.y;
+    WAKEFIELD_REQUEST_WAIT_END(surface_location_request);
+
+    if (error_code != WAKEFIELD_ERROR_NO_ERROR) {
+        handle_wakefield_error(env, error_code);
+        return NULL;
+    } else {
+        return (*env)->NewObject(env, pointClass, pointClassConstrMID, x, y);
+    }
+#else
+    return NULL;
+#endif
+}
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLRobotPeer_setLocationOfWLSurfaceImpl
+        (JNIEnv *env, jclass clazz, jlong wlSurfacePtr, jint x, jint y)
+{
+#ifdef WAKEFIELD_ROBOT
+    if (!wakefield) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "no 'wakefield' protocol extension");
+        return;
+    }
+
+    J2dTrace2(J2D_TRACE_INFO, "WLRobotPeer: sending move_surface request to wakefield %d, %d\n",
+            x, y);
+
+    struct wl_surface * const surface = (struct wl_surface*) wlSurfacePtr;
+    if (!surface) {
+        J2dTrace(J2D_TRACE_INFO, "WLRobotPeer: unable to set location for NULL surface\n");
+        return;
+    }
+
+    wakefield_move_surface(wakefield, surface, x, y);
+    wl_surface_commit(surface);
+    wl_flush_to_server(env);
+#endif
+}
+
+JNIEXPORT jintArray JNICALL
+Java_sun_awt_wl_WLRobotPeer_getRGBPixelsImpl
+        (JNIEnv *env, jclass clazz, jint x, jint y, jint width, jint height)
+{
+#ifdef WAKEFIELD_ROBOT
+    if (!wakefield) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "no 'wakefield' protocol extension");
+        return NULL;
+    }
+
+    uint32_t *buffer_data;
+    int       buffer_size_in_bytes;
+    struct wl_buffer *buffer = allocate_buffer(env, width, height, &buffer_data, &buffer_size_in_bytes);
+    if (!buffer) {
+        return NULL;
+    }
+
+    WAKEFIELD_REQUEST_INIT(screen_capture_request);
+
+    wakefield_capture_create(wakefield, buffer, x, y);
+    wl_display_flush(wl_display); // event will be delivered on EDT, see wakefield_capture_ready()
+
+    WAKEFIELD_REQUEST_WAIT_START(screen_capture_request);
+    const uint32_t error_code = screen_capture_request.error_code;
+    WAKEFIELD_REQUEST_WAIT_END(screen_capture_request);
+
+    jintArray arrayObj = NULL;
+
+    if (error_code != WAKEFIELD_ERROR_NO_ERROR) {
+        handle_wakefield_error(env, error_code);
+    } else {
+        arrayObj = (*env)->NewIntArray(env, buffer_size_in_bytes / 4);
+        if (arrayObj != NULL) {
+            jint *array = (*env)->GetPrimitiveArrayCritical(env, arrayObj, NULL);
+            if (array == NULL) {
+                JNU_ThrowOutOfMemoryError(env, "Wayland robot screen capture");
+            } else {
+                memcpy(array, buffer_data, buffer_size_in_bytes);
+                (*env)->ReleasePrimitiveArrayCritical(env, arrayObj, array, 0);
+            }
+        }
+    }
+
+    wl_buffer_destroy(buffer);
+    munmap(buffer_data, buffer_size_in_bytes);
+    return arrayObj;
+#else
+    return NULL;
+#endif
+}
+
+#ifdef WAKEFIELD_ROBOT
+
+static void wakefield_surface_location(void *data, struct wakefield *wakefield,
+                                       struct wl_surface *surface, int32_t x, int32_t y,
+                                       uint32_t error_code)
+{
+    J2dTrace3(J2D_TRACE_INFO, "WLRobotPeer: event wakefield_surface_location: coordinates %d, %d (error %d)\n",
+            x, y, error_code);
+
+    WAKEFIELD_EVENT_NOTIFY_START(surface_location_request);
+    surface_location_request.error_code = error_code;
+    surface_location_request.x = x;
+    surface_location_request.y = y;
+    WAKEFIELD_EVENT_NOTIFY_END(surface_location_request);
+}
+
+static void wakefield_pixel_color(void *data, struct wakefield *wakefield,
+                                  int32_t x, int32_t y, uint32_t rgb,
+                                  uint32_t error_code)
+{
+    J2dTrace4(J2D_TRACE_INFO, "WLRobotPeer: event wakefield_pixel_color: %d, %d color 0x%08x (error %d)\n",
+            x, y, rgb, error_code);
+
+    WAKEFIELD_EVENT_NOTIFY_START(pixel_color_request);
+    pixel_color_request.error_code = error_code;
+    pixel_color_request.rgb = rgb;
+    WAKEFIELD_EVENT_NOTIFY_END(pixel_color_request);
+}
+
+static void wakefield_capture_ready(void *data, struct wakefield *wakefield,
+                                    struct wl_buffer *buffer,
+                                    uint32_t error_code)
+{
+    J2dTrace2(J2D_TRACE_INFO, "WLRobotPeer: event wakefield_capture_ready: buffer %p (error %d)\n",
+            buffer, error_code);
+
+    WAKEFIELD_EVENT_NOTIFY_START(screen_capture_request);
+    screen_capture_request.error_code = error_code;
+    WAKEFIELD_EVENT_NOTIFY_END(screen_capture_request);
+}
+
+static void
+handle_wakefield_error(JNIEnv *env, uint32_t error_code)
+{
+    J2dTrace1(J2D_TRACE_ERROR, "WLRobotPeer: error code %d\n", error_code);
+
+    switch (error_code) {
+        case WAKEFIELD_ERROR_OUT_OF_MEMORY:
+            JNU_ThrowOutOfMemoryError(env, "Wayland robot");
+            break;
+
+        case WAKEFIELD_ERROR_FORMAT:
+            JNU_ThrowInternalError(env, "Wayland robot unsupported buffer format");
+            break;
+
+        case WAKEFIELD_ERROR_INTERNAL:
+            JNU_ThrowInternalError(env, "Wayland robot");
+            break;
+
+        case WAKEFIELD_ERROR_INVALID_COORDINATES:
+            // not really an error, but a reason to return something default
+            break;
+
+        default:
+            // not all errors warrant an exception
+            break;
+    }
+}
+
+struct wakefield_listener wakefield_listener = {
+        .surface_location = wakefield_surface_location,
+        .pixel_color      = wakefield_pixel_color,
+        .capture_ready    = wakefield_capture_ready
+};
+#endif // WAKEFIELD_ROBOT
+
+#ifndef HEADLESS
+
+static void
+random_shm_name(char *buf) {
+    struct timespec ts;
+    clock_gettime(CLOCK_REALTIME, &ts);
+    long r = ts.tv_nsec;
+    for (int i = 0; i < 6; ++i) {
+        buf[i] = (char)('A' + (r & 15) + (r & 16) * 2);
+        r >>= 5;
+    }
+}
+
+static int
+create_shm_file() {
+    int retries = 100;
+    do {
+        char name[] = "/wl_shm_robot-XXXXXX";
+        random_shm_name(name + sizeof(name) - 7);
+        --retries;
+        int fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600);
+        if (fd >= 0) {
+            shm_unlink(name);
+            return fd;
+        }
+    } while (retries > 0 && errno == EEXIST);
+    return -1;
+}
+
+static int
+allocate_shm_file(int size) {
+    const int fd = create_shm_file();
+
+    if (fd < 0)
+        return -1;
+
+    int ret;
+    do {
+        ret = ftruncate(fd, size);
+    } while (ret < 0 && errno == EINTR);
+
+    if (ret < 0) {
+        close(fd);
+        return -1;
+    }
+
+    return fd;
+}
+
+static struct wl_buffer*
+allocate_buffer(JNIEnv *env, int width, int height, uint32_t **buffer_data, int* size)
+{
+    const int stride = width * 4;
+    *size            = height * stride;
+    *buffer_data     = NULL;
+
+    if (*size <= 0) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "buffer size overflow");
+        return NULL;
+    }
+
+    int fd = allocate_shm_file(*size);
+    if (fd == -1) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "couldn't open shared memory buffer file");
+        return NULL;
+    }
+
+    uint32_t *data = (uint32_t *) mmap(NULL, *size,
+                                       PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+    if (data == MAP_FAILED) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "couldn't mmap shared memory buffer");
+        close(fd);
+        return NULL;
+    }
+
+    struct wl_shm_pool *pool = wl_shm_create_pool(wl_shm, fd, *size);
+    struct wl_buffer *buffer = wl_shm_pool_create_buffer(
+            (struct wl_shm_pool*)pool, 0, width, height, stride, WL_SHM_FORMAT_XRGB8888);
+    *buffer_data = data;
+    wl_shm_pool_destroy(pool); // buffers keep references to the pool, can "destroy" now
+    close(fd); // the server will keep this open as long as needed
+
+    return buffer;
+}
+#endif  // HEADLESS

src/java.desktop/unix/native/libawt_wlawt/WLRobotPeer.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifdef WAKEFIELD_ROBOT
+extern struct wakefield         *wakefield;
+extern struct wakefield_listener wakefield_listener;
+extern struct wl_event_queue    *robot_queue;
+#endif

src/java.desktop/unix/native/libawt_wlawt/WLToolkit.c

@@ -0,0 +1,453 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifdef HEADLESS
+    #error This file should not be included in headless library
+#endif
+
+
+#include <stdbool.h>
+#include <dlfcn.h>
+#include <string.h>
+#include <poll.h>
+#include <errno.h>
+#include <Trace.h>
+
+#include "jni_util.h"
+#include "sun_awt_wl_WLToolkit.h"
+#include "WLToolkit.h"
+#include "WLRobotPeer.h"
+
+#ifdef WAKEFIELD_ROBOT
+#include "wakefield-client-protocol.h"
+#include "sun_awt_wl_WLRobotPeer.h"
+#endif
+
+extern JavaVM *jvm;
+
+struct wl_display *wl_display = NULL;
+struct wl_shm *wl_shm = NULL;
+struct wl_compositor *wl_compositor = NULL;
+struct xdg_wm_base *xdg_wm_base = NULL;
+
+JNIEnv *getEnv() {
+    JNIEnv *env;
+    // assuming we're always called from Java thread
+    (*jvm)->GetEnv(jvm, (void**)&env, JNI_VERSION_1_2);
+    return env;
+}
+
+static void xdg_wm_base_ping(void *data, struct xdg_wm_base *xdg_wm_base, uint32_t serial) {
+    xdg_wm_base_pong(xdg_wm_base, serial);
+}
+
+static const struct xdg_wm_base_listener xdg_wm_base_listener = {
+        .ping = xdg_wm_base_ping,
+};
+
+static void registry_global(void *data, struct wl_registry *wl_registry,
+                            uint32_t name, const char *interface, uint32_t version) {
+    if (strcmp(interface, wl_shm_interface.name) == 0) {
+        wl_shm = wl_registry_bind( wl_registry, name, &wl_shm_interface, 1);
+    } else if (strcmp(interface, wl_compositor_interface.name) == 0) {
+        wl_compositor = wl_registry_bind(wl_registry, name, &wl_compositor_interface, 4);
+    } else if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
+        xdg_wm_base = wl_registry_bind(wl_registry, name, &xdg_wm_base_interface, 1);
+        xdg_wm_base_add_listener(xdg_wm_base, &xdg_wm_base_listener, NULL);
+    }
+#ifdef WAKEFIELD_ROBOT
+    else if (strcmp(interface, wakefield_interface.name) == 0) {
+        wakefield = wl_registry_bind(wl_registry, name, &wakefield_interface, 1);
+        wakefield_add_listener(wakefield, &wakefield_listener, NULL);
+        robot_queue = wl_display_create_queue(wl_display);
+        if (robot_queue == NULL) {
+            J2dTrace(J2D_TRACE_ERROR, "WLToolkit: Failed to create wakefield robot queue\n");
+            wakefield_destroy(wakefield);
+            wakefield = NULL;
+        } else {
+            wl_proxy_set_queue((struct wl_proxy*)wakefield, robot_queue);
+        }
+        // TODO: call before destroying the display:
+        //  wl_event_queue_destroy(robot_queue);
+    }
+#endif
+}
+
+static void registry_global_remove(void *data, struct wl_registry *wl_registry, uint32_t name) {
+}
+
+static const struct wl_registry_listener wl_registry_listener = {
+        .global = registry_global,
+        .global_remove = registry_global_remove,
+};
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLToolkit_initIDs
+  (JNIEnv *env, jclass clazz)
+{
+    wl_display = wl_display_connect(NULL);
+    if (!wl_display) {
+        J2dTrace(J2D_TRACE_ERROR, "WLToolkit: Failed to connect to Wayland display\n");
+        JNU_ThrowByName(env, "java/awt/AWTError", "Can't connect to the Wayland server");
+        return;
+    }
+
+    struct wl_registry *wl_registry = wl_display_get_registry(wl_display);
+    wl_registry_add_listener(wl_registry, &wl_registry_listener, NULL);
+    wl_display_roundtrip(wl_display);
+    J2dTrace1(J2D_TRACE_INFO, "WLToolkit: Connection to display(%p) established\n", wl_display);
+}
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLToolkit_dispatchEventsOnEDT
+  (JNIEnv *env, jobject obj)
+{
+    // Dispatch all the events on the display's default event queue.
+    // The handlers of those events will be called from here, i.e. on EDT,
+    // and therefore must not block indefinitely.
+    wl_display_dispatch_pending(wl_display);
+}
+
+static int
+wl_display_poll(struct wl_display *display, int events, int poll_timeout)
+{
+    int rc = 0;
+    struct pollfd pfd[1] = { {.fd = wl_display_get_fd(display), .events = events} };
+    do {
+        errno = 0;
+        rc = poll(pfd, 1, poll_timeout);
+    } while (rc == -1 && errno == EINTR);
+    return rc;
+}
+
+static void
+dispatch_nondefault_queues(JNIEnv *env)
+{
+    // The handlers of the events on these queues will be called from here, i.e. on
+    // the 'AWT-Wayland' (toolkit) thread. The handlers must *not* execute any
+    // arbitrary user code that can block.
+    int rc = 0;
+
+#ifdef WAKEFIELD_ROBOT
+    if (robot_queue) {
+        rc = wl_display_dispatch_queue_pending(wl_display, robot_queue);
+    }
+#endif
+
+    if (rc < 0) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "Wayland error during events processing");
+        return;
+    }
+}
+
+int
+wl_flush_to_server(JNIEnv *env)
+{
+    int rc = 0;
+
+    while (true) {
+        errno = 0;
+        rc = wl_display_flush(wl_display);
+        if (rc != -1 || errno != EAGAIN) {
+            break;
+        }
+
+        rc = wl_display_poll(wl_display, POLLOUT, -1);
+        if (rc == -1) {
+            JNU_ThrowByName(env, "java/awt/AWTError", "Wayland display error polling out to the server");
+            return sun_awt_wl_WLToolkit_READ_RESULT_ERROR;
+        }
+    }
+
+    if (rc < 0 && errno != EPIPE) {
+        JNU_ThrowByName(env, "java/awt/AWTError", "Wayland display error flushing data out to the server");
+        return sun_awt_wl_WLToolkit_READ_RESULT_ERROR;
+    }
+
+    return 0;
+}
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLToolkit_flushImpl
+  (JNIEnv *env, jobject obj)
+{
+    (void) wl_flush_to_server(env);
+}
+
+JNIEXPORT void JNICALL
+Java_sun_awt_wl_WLToolkit_dispatchNonDefaultQueuesImpl
+  (JNIEnv *env, jobject obj)
+{
+    int rc = 0;
+    while (rc != -1) {
+#ifdef WAKEFIELD_ROBOT
+        if (robot_queue) {
+            rc = wl_display_dispatch_queue(wl_display, robot_queue);
+        } else {
+            break;
+        }
+#else
+    break;
+#endif
+    }
+    // Simply return in case of any error; the actual error reporting (exception)
+    // and/or shutdown will happen on the "main" toolkit thread AWT-Wayland,
+    // see readEvents() below.
+}
+
+JNIEXPORT jint JNICALL
+Java_sun_awt_wl_WLToolkit_readEvents
+  (JNIEnv *env, jobject obj)
+{
+    // NB: this method should be modeled after wl_display_dispatch_queue() from the Wayland code
+    int rc = 0;
+
+    // Check if there's anything in the default event queue already *and*
+    // lock the queue for this thread.
+    rc = wl_display_prepare_read(wl_display);
+    if (rc != 0) {
+        // Ask the caller to give dispatchEventsOnEDT() more time to process
+        // the default queue before calling us again.
+        return sun_awt_wl_WLToolkit_READ_RESULT_NO_NEW_EVENTS;
+    }
+
+    rc = wl_flush_to_server(env);
+    if (rc != 0) {
+        wl_display_cancel_read(wl_display);
+        return sun_awt_wl_WLToolkit_READ_RESULT_ERROR;
+    }
+
+    // Wait for new data *from* the server.
+    // Specify some timeout because otherwise 'flush' above that sends data
+    // to the server will have to wait too long.
+    rc = wl_display_poll(wl_display, POLLIN,
+                         sun_awt_wl_WLToolkit_WAYLAND_DISPLAY_INTERACTION_TIMEOUT_MS);
+    if (rc == -1) {
+        wl_display_cancel_read(wl_display);
+        JNU_ThrowByName(env, "java/awt/AWTError", "Wayland display error polling for data from the server");
+        return sun_awt_wl_WLToolkit_READ_RESULT_ERROR;
+    }
+
+    // Transform the data read by the above call into events on the corresponding queues of the display.
+    rc = wl_display_read_events(wl_display);
+    if (rc == -1) { // display disconnect has likely happened
+        return sun_awt_wl_WLToolkit_READ_RESULT_ERROR;
+    }
+
+    rc = wl_display_prepare_read(wl_display);
+    if (rc != 0) {
+        return sun_awt_wl_WLToolkit_READ_RESULT_FINISHED_WITH_EVENTS;
+    } else {
+        wl_display_cancel_read(wl_display);
+        return sun_awt_wl_WLToolkit_READ_RESULT_FINISHED_NO_EVENTS;
+    }
+}
+
+JNIEXPORT jint JNICALL
+DEF_JNI_OnLoad(JavaVM *vm, void *reserved)
+{
+    jvm = vm;
+
+    return JNI_VERSION_1_2;
+}
+
+
+JNIEXPORT void JNICALL
+Java_java_awt_Component_initIDs
+  (JNIEnv *env, jclass cls)
+{
+}
+
+
+JNIEXPORT void JNICALL
+Java_java_awt_Container_initIDs
+  (JNIEnv *env, jclass cls)
+{
+
+}
+
+
+JNIEXPORT void JNICALL
+Java_java_awt_Button_initIDs
+  (JNIEnv *env, jclass cls)
+{
+
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_Scrollbar_initIDs
+  (JNIEnv *env, jclass cls)
+{
+
+}
+
+
+JNIEXPORT void JNICALL
+Java_java_awt_Window_initIDs
+  (JNIEnv *env, jclass cls)
+{
+
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_Frame_initIDs
+  (JNIEnv *env, jclass cls)
+{
+
+}
+
+
+JNIEXPORT void JNICALL
+Java_java_awt_MenuComponent_initIDs(JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_Cursor_initIDs(JNIEnv *env, jclass cls)
+{
+}
+
+
+JNIEXPORT void JNICALL Java_java_awt_MenuItem_initIDs
+  (JNIEnv *env, jclass cls)
+{
+}
+
+
+JNIEXPORT void JNICALL Java_java_awt_Menu_initIDs
+  (JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_TextArea_initIDs
+  (JNIEnv *env, jclass cls)
+{
+}
+
+
+JNIEXPORT void JNICALL
+Java_java_awt_Checkbox_initIDs
+  (JNIEnv *env, jclass cls)
+{
+}
+
+
+JNIEXPORT void JNICALL Java_java_awt_ScrollPane_initIDs
+  (JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_TextField_initIDs
+  (JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL Java_java_awt_Dialog_initIDs (JNIEnv *env, jclass cls)
+{
+}
+
+
+
+/*
+ * Class:     java_awt_TrayIcon
+ * Method:    initIDs
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_java_awt_TrayIcon_initIDs(JNIEnv *env , jclass clazz)
+{
+}
+
+
+/*
+ * Class:     java_awt_Cursor
+ * Method:    finalizeImpl
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL
+Java_java_awt_Cursor_finalizeImpl(JNIEnv *env, jclass clazz, jlong pData)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_FileDialog_initIDs
+  (JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_AWTEvent_initIDs(JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_Insets_initIDs(JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_KeyboardFocusManager_initIDs
+    (JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_Font_initIDs(JNIEnv *env, jclass cls) {
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_event_InputEvent_initIDs(JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_event_KeyEvent_initIDs(JNIEnv *env, jclass cls)
+{
+}
+
+JNIEXPORT void JNICALL
+Java_java_awt_Event_initIDs(JNIEnv *env, jclass cls)
+{
+}
+
+
+JNIEXPORT void JNICALL
+Java_sun_awt_SunToolkit_closeSplashScreen(JNIEnv *env, jclass cls)
+{
+    typedef void (*SplashClose_t)();
+    SplashClose_t splashClose;
+    void* hSplashLib = dlopen(0, RTLD_LAZY);
+    if (!hSplashLib) {
+        return;
+    }
+    splashClose = (SplashClose_t)dlsym(hSplashLib,
+        "SplashClose");
+    if (splashClose) {
+        splashClose();
+    }
+    dlclose(hSplashLib);
+}

src/java.desktop/unix/native/libawt_wlawt/WLToolkit.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2021, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <wayland-client.h>
+#include "xdg-shell-client-protocol.h"
+
+extern struct wl_display *wl_display;
+extern struct wl_shm *wl_shm;
+extern struct wl_compositor *wl_compositor;
+extern struct xdg_wm_base *xdg_wm_base;
+
+JNIEnv *getEnv();
+
+int wl_flush_to_server(JNIEnv* env);

src/java.desktop/unix/native/libawt_wlawt/wakefield-client-protocol.c

@@ -0,0 +1,73 @@
+/* Generated by wayland-scanner 1.19.0 */
+
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+extern const struct wl_interface wl_buffer_interface;
+extern const struct wl_interface wl_surface_interface;
+
+static const struct wl_interface *wakefield_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&wl_surface_interface,
+	NULL,
+	NULL,
+	&wl_surface_interface,
+	&wl_buffer_interface,
+	NULL,
+	NULL,
+	&wl_surface_interface,
+	NULL,
+	NULL,
+	NULL,
+	&wl_buffer_interface,
+	NULL,
+};
+
+static const struct wl_message wakefield_requests[] = {
+	{ "destroy", "", wakefield_types + 0 },
+	{ "move_surface", "oii", wakefield_types + 4 },
+	{ "get_surface_location", "o", wakefield_types + 7 },
+	{ "get_pixel_color", "ii", wakefield_types + 0 },
+	{ "capture_create", "oii", wakefield_types + 8 },
+};
+
+static const struct wl_message wakefield_events[] = {
+	{ "surface_location", "oiiu", wakefield_types + 11 },
+	{ "pixel_color", "iiuu", wakefield_types + 0 },
+	{ "capture_ready", "ou", wakefield_types + 15 },
+};
+
+WL_EXPORT const struct wl_interface wakefield_interface = {
+	"wakefield", 1,
+	5, wakefield_requests,
+	3, wakefield_events,
+};
+

src/java.desktop/unix/native/libawt_wlawt/wakefield-client-protocol.h

@@ -0,0 +1,266 @@
+/* Generated by wayland-scanner 1.19.0 */
+
+#ifndef WAKEFIELD_CLIENT_PROTOCOL_H
+#define WAKEFIELD_CLIENT_PROTOCOL_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include "wayland-client.h"
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @page page_wakefield The wakefield protocol
+ * @section page_ifaces_wakefield Interfaces
+ * - @subpage page_iface_wakefield - provides capabilities necessary to for java.awt.Robot and such
+ * @section page_copyright_wakefield Copyright
+ * <pre>
+ *
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ * </pre>
+ */
+struct wakefield;
+struct wl_buffer;
+struct wl_surface;
+
+#ifndef WAKEFIELD_INTERFACE
+#define WAKEFIELD_INTERFACE
+/**
+ * @page page_iface_wakefield wakefield
+ * @section page_iface_wakefield_desc Description
+ * @section page_iface_wakefield_api API
+ * See @ref iface_wakefield.
+ */
+/**
+ * @defgroup iface_wakefield The wakefield interface
+ */
+extern const struct wl_interface wakefield_interface;
+#endif
+
+#ifndef WAKEFIELD_ERROR_ENUM
+#define WAKEFIELD_ERROR_ENUM
+enum wakefield_error {
+	/**
+	 * error code 0 reserved for the absence of error
+	 */
+	WAKEFIELD_ERROR_NO_ERROR = 0,
+	/**
+	 * supplied absolute coordinates point              outside of any output
+	 */
+	WAKEFIELD_ERROR_INVALID_COORDINATES = 1,
+	/**
+	 * the request could not be fulfilled due to memory allocation error
+	 */
+	WAKEFIELD_ERROR_OUT_OF_MEMORY = 2,
+	/**
+	 * a generic error code for internal errors
+	 */
+	WAKEFIELD_ERROR_INTERNAL = 3,
+	/**
+	 * (temporary?) color cannot be converted to RGB format
+	 */
+	WAKEFIELD_ERROR_FORMAT = 4,
+};
+#endif /* WAKEFIELD_ERROR_ENUM */
+
+/**
+ * @ingroup iface_wakefield
+ * @struct wakefield_listener
+ */
+struct wakefield_listener {
+	/**
+	 * facilitates implementation of Frame.getLocation()
+	 *
+	 * This event reveals the absolute coordinates of the surface if
+	 * error_code is zero. If error_code is non-zero, (x, y) are
+	 * undefined. The surface argument always correspond to that of the
+	 * get_surface_location request.
+	 */
+	void (*surface_location)(void *data,
+				 struct wakefield *wakefield,
+				 struct wl_surface *surface,
+				 int32_t x,
+				 int32_t y,
+				 uint32_t error_code);
+	/**
+	 * facilitates implementation of Robot.getPixelColor()
+	 *
+	 * This event shows the color (24-bit, format r8g8b8) of the
+	 * pixel with the given absolute coordinates. The (x, y) arguments
+	 * correspond to that of the get_pixel_color request. If error_code
+	 * is non-zero, the rgb argument is undefined and the error_code
+	 * argument contains a code from the error enum.
+	 */
+	void (*pixel_color)(void *data,
+			    struct wakefield *wakefield,
+			    int32_t x,
+			    int32_t y,
+			    uint32_t rgb,
+			    uint32_t error_code);
+	/**
+	 */
+	void (*capture_ready)(void *data,
+			      struct wakefield *wakefield,
+			      struct wl_buffer *buffer,
+			      uint32_t error_code);
+};
+
+/**
+ * @ingroup iface_wakefield
+ */
+static inline int
+wakefield_add_listener(struct wakefield *wakefield,
+		       const struct wakefield_listener *listener, void *data)
+{
+	return wl_proxy_add_listener((struct wl_proxy *) wakefield,
+				     (void (**)(void)) listener, data);
+}
+
+#define WAKEFIELD_DESTROY 0
+#define WAKEFIELD_MOVE_SURFACE 1
+#define WAKEFIELD_GET_SURFACE_LOCATION 2
+#define WAKEFIELD_GET_PIXEL_COLOR 3
+#define WAKEFIELD_CAPTURE_CREATE 4
+
+/**
+ * @ingroup iface_wakefield
+ */
+#define WAKEFIELD_SURFACE_LOCATION_SINCE_VERSION 1
+/**
+ * @ingroup iface_wakefield
+ */
+#define WAKEFIELD_PIXEL_COLOR_SINCE_VERSION 1
+/**
+ * @ingroup iface_wakefield
+ */
+#define WAKEFIELD_CAPTURE_READY_SINCE_VERSION 1
+
+/**
+ * @ingroup iface_wakefield
+ */
+#define WAKEFIELD_DESTROY_SINCE_VERSION 1
+/**
+ * @ingroup iface_wakefield
+ */
+#define WAKEFIELD_MOVE_SURFACE_SINCE_VERSION 1
+/**
+ * @ingroup iface_wakefield
+ */
+#define WAKEFIELD_GET_SURFACE_LOCATION_SINCE_VERSION 1
+/**
+ * @ingroup iface_wakefield
+ */
+#define WAKEFIELD_GET_PIXEL_COLOR_SINCE_VERSION 1
+/**
+ * @ingroup iface_wakefield
+ */
+#define WAKEFIELD_CAPTURE_CREATE_SINCE_VERSION 1
+
+/** @ingroup iface_wakefield */
+static inline void
+wakefield_set_user_data(struct wakefield *wakefield, void *user_data)
+{
+	wl_proxy_set_user_data((struct wl_proxy *) wakefield, user_data);
+}
+
+/** @ingroup iface_wakefield */
+static inline void *
+wakefield_get_user_data(struct wakefield *wakefield)
+{
+	return wl_proxy_get_user_data((struct wl_proxy *) wakefield);
+}
+
+static inline uint32_t
+wakefield_get_version(struct wakefield *wakefield)
+{
+	return wl_proxy_get_version((struct wl_proxy *) wakefield);
+}
+
+/**
+ * @ingroup iface_wakefield
+ */
+static inline void
+wakefield_destroy(struct wakefield *wakefield)
+{
+	wl_proxy_marshal((struct wl_proxy *) wakefield,
+			 WAKEFIELD_DESTROY);
+
+	wl_proxy_destroy((struct wl_proxy *) wakefield);
+}
+
+/**
+ * @ingroup iface_wakefield
+ *
+ * This instructs the window manager to position the given wl_surface
+ * at the given absolute coordinates. The subsequent get_surface_location
+ * request will return these coordinates unless the surface was moved by
+ * a third party.
+ */
+static inline void
+wakefield_move_surface(struct wakefield *wakefield, struct wl_surface *surface, int32_t x, int32_t y)
+{
+	wl_proxy_marshal((struct wl_proxy *) wakefield,
+			 WAKEFIELD_MOVE_SURFACE, surface, x, y);
+}
+
+/**
+ * @ingroup iface_wakefield
+ *
+ * This requests a surface_location event for the given surface.
+ */
+static inline void
+wakefield_get_surface_location(struct wakefield *wakefield, struct wl_surface *surface)
+{
+	wl_proxy_marshal((struct wl_proxy *) wakefield,
+			 WAKEFIELD_GET_SURFACE_LOCATION, surface);
+}
+
+/**
+ * @ingroup iface_wakefield
+ *
+ * This requests a pixel_color event at the given absolute coordinates.
+ */
+static inline void
+wakefield_get_pixel_color(struct wakefield *wakefield, int32_t x, int32_t y)
+{
+	wl_proxy_marshal((struct wl_proxy *) wakefield,
+			 WAKEFIELD_GET_PIXEL_COLOR, x, y);
+}
+
+/**
+ * @ingroup iface_wakefield
+ */
+static inline void
+wakefield_capture_create(struct wakefield *wakefield, struct wl_buffer *buffer, int32_t x, int32_t y)
+{
+	wl_proxy_marshal((struct wl_proxy *) wakefield,
+			 WAKEFIELD_CAPTURE_CREATE, buffer, x, y);
+}
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif

src/java.desktop/unix/native/libawt_wlawt/xdg-shell-protocol.c

@@ -0,0 +1,181 @@
+/* Generated by wayland-scanner 1.18.0 */
+
+/*
+ * Copyright © 2008-2013 Kristian Høgsberg
+ * Copyright © 2013      Rafael Antognolli
+ * Copyright © 2013      Jasper St. Pierre
+ * Copyright © 2010-2013 Intel Corporation
+ * Copyright © 2015-2017 Samsung Electronics Co., Ltd
+ * Copyright © 2015-2017 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_output_interface;
+extern const struct wl_interface wl_seat_interface;
+extern const struct wl_interface wl_surface_interface;
+extern const struct wl_interface xdg_popup_interface;
+extern const struct wl_interface xdg_positioner_interface;
+extern const struct wl_interface xdg_surface_interface;
+extern const struct wl_interface xdg_toplevel_interface;
+
+static const struct wl_interface *xdg_shell_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&xdg_positioner_interface,
+	&xdg_surface_interface,
+	&wl_surface_interface,
+	&xdg_toplevel_interface,
+	&xdg_popup_interface,
+	&xdg_surface_interface,
+	&xdg_positioner_interface,
+	&xdg_toplevel_interface,
+	&wl_seat_interface,
+	NULL,
+	NULL,
+	NULL,
+	&wl_seat_interface,
+	NULL,
+	&wl_seat_interface,
+	NULL,
+	NULL,
+	&wl_output_interface,
+	&wl_seat_interface,
+	NULL,
+	&xdg_positioner_interface,
+	NULL,
+};
+
+static const struct wl_message xdg_wm_base_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "create_positioner", "n", xdg_shell_types + 4 },
+	{ "get_xdg_surface", "no", xdg_shell_types + 5 },
+	{ "pong", "u", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_wm_base_events[] = {
+	{ "ping", "u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_wm_base_interface = {
+	"xdg_wm_base", 3,
+	4, xdg_wm_base_requests,
+	1, xdg_wm_base_events,
+};
+
+static const struct wl_message xdg_positioner_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "set_size", "ii", xdg_shell_types + 0 },
+	{ "set_anchor_rect", "iiii", xdg_shell_types + 0 },
+	{ "set_anchor", "u", xdg_shell_types + 0 },
+	{ "set_gravity", "u", xdg_shell_types + 0 },
+	{ "set_constraint_adjustment", "u", xdg_shell_types + 0 },
+	{ "set_offset", "ii", xdg_shell_types + 0 },
+	{ "set_reactive", "3", xdg_shell_types + 0 },
+	{ "set_parent_size", "3ii", xdg_shell_types + 0 },
+	{ "set_parent_configure", "3u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_positioner_interface = {
+	"xdg_positioner", 3,
+	10, xdg_positioner_requests,
+	0, NULL,
+};
+
+static const struct wl_message xdg_surface_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "get_toplevel", "n", xdg_shell_types + 7 },
+	{ "get_popup", "n?oo", xdg_shell_types + 8 },
+	{ "set_window_geometry", "iiii", xdg_shell_types + 0 },
+	{ "ack_configure", "u", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_surface_events[] = {
+	{ "configure", "u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_surface_interface = {
+	"xdg_surface", 3,
+	5, xdg_surface_requests,
+	1, xdg_surface_events,
+};
+
+static const struct wl_message xdg_toplevel_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "set_parent", "?o", xdg_shell_types + 11 },
+	{ "set_title", "s", xdg_shell_types + 0 },
+	{ "set_app_id", "s", xdg_shell_types + 0 },
+	{ "show_window_menu", "ouii", xdg_shell_types + 12 },
+	{ "move", "ou", xdg_shell_types + 16 },
+	{ "resize", "ouu", xdg_shell_types + 18 },
+	{ "set_max_size", "ii", xdg_shell_types + 0 },
+	{ "set_min_size", "ii", xdg_shell_types + 0 },
+	{ "set_maximized", "", xdg_shell_types + 0 },
+	{ "unset_maximized", "", xdg_shell_types + 0 },
+	{ "set_fullscreen", "?o", xdg_shell_types + 21 },
+	{ "unset_fullscreen", "", xdg_shell_types + 0 },
+	{ "set_minimized", "", xdg_shell_types + 0 },
+};
+
+static const struct wl_message xdg_toplevel_events[] = {
+	{ "configure", "iia", xdg_shell_types + 0 },
+	{ "close", "", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_toplevel_interface = {
+	"xdg_toplevel", 3,
+	14, xdg_toplevel_requests,
+	2, xdg_toplevel_events,
+};
+
+static const struct wl_message xdg_popup_requests[] = {
+	{ "destroy", "", xdg_shell_types + 0 },
+	{ "grab", "ou", xdg_shell_types + 22 },
+	{ "reposition", "3ou", xdg_shell_types + 24 },
+};
+
+static const struct wl_message xdg_popup_events[] = {
+	{ "configure", "iiii", xdg_shell_types + 0 },
+	{ "popup_done", "", xdg_shell_types + 0 },
+	{ "repositioned", "3u", xdg_shell_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface xdg_popup_interface = {
+	"xdg_popup", 3,
+	3, xdg_popup_requests,
+	3, xdg_popup_events,
+};
+

src/java.desktop/unix/native/libfontmanager/fontmanager_LoadLibrary.c

@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <stdio.h>
+#include <dlfcn.h>
+#include <string.h>
+#include <stdlib.h>
+#include <jni.h>
+#include <jni_util.h>
+#include <jvm.h>
+#include "gdefs.h"
+#include "sun_awt_PlatformGraphicsInfo.h"
+#include <sys/param.h>
+#include <sys/utsname.h>
+
+#ifdef AIX
+#include "porting_aix.h" /* For the 'dladdr' function. */
+#endif
+
+#ifndef MACOSX
+#ifndef STATIC_BUILD
+
+#define CHECK_EXCEPTION_FATAL(env, message) \
+    if ((*env)->ExceptionCheck(env)) { \
+        (*env)->ExceptionClear(env); \
+        (*env)->FatalError(env, message); \
+    }
+
+static void *fontmanagerHandle = NULL;
+
+JNIEXPORT jboolean JNICALL AWTIsHeadless();
+JNIEXPORT jint JNICALL AWTGetToolkitID();
+
+jint
+Fontmanager_OnLoad(JavaVM *vm, void *reserved)
+{
+    JNIEnv *env = (JNIEnv *)JNU_GetEnv(vm, JNI_VERSION_1_2);
+
+    if (!AWTIsHeadless() && AWTGetToolkitID() == sun_awt_PlatformGraphicsInfo_TK_X11) {
+
+        Dl_info dlinfo;
+        char buf[MAXPATHLEN];
+        int32_t len;
+        char *p, *tk;
+
+        tk = "/libfontmanager_xawt.so";
+
+        /* Get address of this library and the directory containing it. */
+        dladdr((void *)Fontmanager_OnLoad, &dlinfo);
+        realpath((char *)dlinfo.dli_fname, buf);
+        len = strlen(buf);
+        p = strrchr(buf, '/');
+        /* Calculate library name to load */
+        strncpy(p, tk, MAXPATHLEN-len-1);
+
+        jstring jbuf = JNU_NewStringPlatform(env, buf);
+        CHECK_EXCEPTION_FATAL(env, "Could not allocate library name");
+        JNU_CallStaticMethodByName(env, NULL, "java/lang/System", "load",
+                                   "(Ljava/lang/String;)V",
+                                   jbuf);
+        fontmanagerHandle = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL);
+    }
+
+    return JNI_VERSION_1_2;
+}
+
+JNIEXPORT jint JNICALL
+DEF_JNI_OnLoad(JavaVM *vm, void *reserved)
+{
+    return Fontmanager_OnLoad(vm, reserved);
+}
+
+#endif
+#endif

src/java.desktop/unix/native/libfontmanager_xawt/X11FontScaler.c

@@ -366,8 +366,9 @@ JNIEXPORT jobject JNICALL
      * leadingY : made-up number, but being compatible with what 1.4.x did
      * advance : no need to set yMaxLinearAdvanceWidth - it will be zero.
      */
-    metrics = (*env)->NewObject(env, sunFontIDs.strikeMetricsClass,
-                                sunFontIDs.strikeMetricsCtr,
+    const FontManagerNativeIDs* sunFontIDs = getSunFontIDsPtr(env);
+    metrics = (*env)->NewObject(env, sunFontIDs->strikeMetricsClass,
+                                sunFontIDs->strikeMetricsCtr,
                                 j0, ay, j0, dy, j1, j0, j0, j1, mx, j0);
 /*      printf("X11 asc=%f dsc=%f adv=%f scale=%f\n", */
 /*          ay, dy, mx, (float)context->scale); */

src/java.desktop/unix/native/libfontmanager_xawt/X11TextRenderer.c

@@ -62,7 +62,7 @@ JNIEXPORT void JNICALL Java_sun_font_X11TextRenderer_doDrawGlyphList
     SurfaceDataBounds bounds;
     Region_GetBounds(env, clip, &bounds);
 
-    glyphCount =  (*env)->GetIntField(env, glyphlist, sunFontIDs.glyphListLen);
+    glyphCount =  (*env)->GetIntField(env, glyphlist, getSunFontIDsPtr(env)->glyphListLen);
     if ((gbv = setupBlitVector(env, glyphlist, 0, glyphCount)) == NULL) {
         return;
     }

test/jdk/java/awt/Toolkit/Wayland/WaylandToolkit.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @summary Check for Wayland toolkit
+ * @run main/othervm -Dawt.toolkit.name=WLToolkit WaylandToolkit
+ * @requires os.family == "linux"
+ */
+import java.awt.*;
+
+public class WaylandToolkit {
+
+    public static void main(String args[]) {
+        Toolkit tk = Toolkit.getDefaultToolkit();
+        if (!"sun.awt.wl.WLToolkit".equals(tk.getClass().getName())) {
+            throw new RuntimeException("WLToolkit not found");
+        }
+    }
+}

test/jdk/java/awt/wakefield/ScreenCapture.java

@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, JetBrains s.r.o.. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import javax.swing.*;
+import java.nio.charset.StandardCharsets;
+import javax.imageio.ImageIO;
+import java.io.File;
+import java.io.IOException;
+
+
+/**
+ * @test
+ * @key headful
+ * @summary  Windows HiDPI support
+ * @requires (os.family == "linux")
+ * @library /test/lib
+ * @build ScreenCapture
+ * @run driver WakefieldTestDriver 1x1400x800 ScreenCapture
+ * @run driver WakefieldTestDriver 2x830x800 ScreenCapture
+ */
+
+public class ScreenCapture {
+    private static final Color[] COLORS = {
+            Color.GREEN, Color.BLUE, Color.ORANGE, Color.RED};
+
+    private static volatile ScreenCapture theTest;
+
+    private static JFrame frame;
+
+    public static void main(String[] args) throws Exception {
+        runSwing( () -> {
+                    frame = new JFrame();
+                    frame.setPreferredSize(new Dimension(800, 300));
+                    frame.setUndecorated(true);
+                    frame.add(new JPanel() {
+                        @Override
+                        public void paint(Graphics g) {
+                            super.paintComponent(g);
+                            final int w = getWidth();
+                            final int h = getHeight();
+                            g.setColor(COLORS[0]);
+                            g.fillRect(0, 0, w / 2, h / 2);
+                            g.setColor(COLORS[1]);
+                            g.fillRect(w / 2, 0, w / 2, h / 2);
+                            g.setColor(COLORS[2]);
+                            g.fillRect(0, h / 2, w / 2, h / 2);
+                            g.setColor(COLORS[3]);
+                            g.fillRect(w / 2, h / 2, w / 2, h / 2);
+                        }
+                    });
+                    frame.pack();
+                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+                    frame.setVisible(true);
+                    frame.setBounds(432, 89, 800, 300);
+                });
+
+        final Robot robot = new Robot();
+        robot.waitForIdle();
+
+        final Rectangle rect = frame.getBounds();
+        rect.setLocation(frame.getLocationOnScreen());
+
+        // the windows fades in slowly, need to wait quite a bit in order to get reliable colors
+        robot.delay(1000);
+
+        System.out.println("Creating screen capture of " + rect);
+        final BufferedImage image = robot.createScreenCapture(rect);
+
+        try {
+            checkPixelColor(robot, rect.x + OFFSET, rect.y + OFFSET, COLORS[0]);
+            checkPixelColor(robot, rect.x + rect.width - OFFSET, rect.y + OFFSET, COLORS[1]);
+            checkPixelColor(robot, rect.x + OFFSET, rect.y + rect.height - OFFSET, COLORS[2]);
+            checkPixelColor(robot, rect.x + rect.width - OFFSET, rect.y + rect.height - OFFSET, COLORS[3]);
+        } finally {
+            frame.dispose();
+        }
+
+        final int w = image.getWidth();
+        final int h = image.getHeight();
+
+        if (w != frame.getWidth() || h != frame.getHeight()) {
+            throw new RuntimeException("Wrong image size!");
+        }
+
+        checkRectColor(image, new Rectangle(0, 0, w / 2, h / 2), COLORS[0]);
+        checkRectColor(image, new Rectangle(w / 2, 0, w / 2, h / 2), COLORS[1]);
+        checkRectColor(image, new Rectangle(0, h / 2, w / 2, h / 2), COLORS[2]);
+        checkRectColor(image, new Rectangle(w / 2, h / 2, w / 2, h / 2), COLORS[3]);
+
+        System.exit(0); // temporary
+    }
+
+    private static final int OFFSET = 5;
+
+    static void checkPixelColor(Robot robot, int x, int y, Color expectedColor) {
+        System.out.print("Checking pixel at " + x + ", " + y + " to have color " + expectedColor);
+        final Color actualColor = robot.getPixelColor(x, y);
+        if (!actualColor.equals(expectedColor)) {
+            System.out.println("... Mismatch: found " + actualColor + " instead");
+            throw new RuntimeException("Wrong color of pixel on screen");
+        } else {
+            System.out.println("... OK");
+        }
+    }
+
+    static void checkRectColor(BufferedImage image, Rectangle rect, Color expectedColor) {
+        System.out.println("Checking rectangle " + rect + " to have color " + expectedColor);
+        final Point[] pointsToCheck = new Point[] {
+                new Point(rect.x + OFFSET, rect.y + OFFSET),                           // top left corner
+                new Point(rect.x + rect.width - OFFSET, rect.y + OFFSET),              // top right corner
+                new Point(rect.x + rect.width / 2, rect.y + rect.height / 2),          // center
+                new Point(rect.x + OFFSET, rect.y + rect.height - OFFSET),             // bottom left corner
+                new Point(rect.x + rect.width - OFFSET, rect.y + rect.height - OFFSET) // bottom right corner
+        };
+
+        for (final var point : pointsToCheck) {
+            System.out.print("Checking color at " + point + " to be equal to " + expectedColor);
+            final int actualColor = image.getRGB(point.x, point.y);
+            if (actualColor != expectedColor.getRGB()) {
+                System.out.println("... Mismatch: found " + new Color(actualColor) + " instead. Check image.png.");
+                try {
+                    ImageIO.write(image, "png", new File("image.png"));
+                } catch(IOException e) {
+                    System.out.println("failed to save image.png.");
+                    e.printStackTrace();
+                }
+                throw new RuntimeException("Wrong image color!");
+            } else {
+                System.out.println("... OK");
+            }
+        }
+    }
+
+    public void dispose() {
+        if (frame != null) {
+            frame.dispose();
+            frame = null;
+        }
+    }
+
+    private static void runSwing(Runnable r) {
+        try {
+            SwingUtilities.invokeAndWait(r);
+        } catch (InterruptedException e) {
+        } catch (InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

test/jdk/java/awt/wakefield/WakefieldTestDriver.java

@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.process.OutputAnalyzer;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.io.IOException;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public class WakefieldTestDriver {
+    final static int DEFAULT_NUMBER_OF_SCREENS = 1;
+    final static int DEFAULT_SCREEN_WIDTH      = 1280;
+    final static int DEFAULT_SCREEN_HEIGHT     = 800;
+    final static int TEST_TIMEOUT_SECONDS      = 10;
+    static void usage() {
+        System.out.println(
+                """
+                WakefieldTestDriver [NxWxH] ClassName [args]
+                where
+                N         - number of Weston outputs (screens); defaults to 1
+                W         - width of each screen in pixels; defaults to 1280
+                H         - height of each screen in pixels; defaults to 800
+                ClassName - class to execute
+                args      - arguments to give to the class""");
+    }
+
+    public static void main(String args[]) throws Exception {
+        if (args.length < 1) {
+            usage();
+            throw new RuntimeException("Insufficient arguments to the test driver");
+        }
+
+        checkEnv(System.getenv());
+
+        final List<String> jvmArgs = new ArrayList<String>();
+        jvmArgs.add("-Dawt.toolkit.name=WLToolkit");
+        jvmArgs.add("-Xcheck:jni");
+
+        int nScreens     = DEFAULT_NUMBER_OF_SCREENS;
+        int screenWidth  = DEFAULT_SCREEN_WIDTH;
+        int screenHeight = DEFAULT_SCREEN_HEIGHT;
+        final String firstArg = args[0];
+        if (Character.isDigit(firstArg.charAt(0))) {
+            try {
+                final int firstXIndex = firstArg.indexOf("x", 0);
+                final int secondXIndex = firstArg.indexOf("x", firstXIndex + 1);
+                nScreens = Integer.valueOf(firstArg.substring(0, firstXIndex));
+                screenWidth = Integer.valueOf(firstArg.substring(firstXIndex + 1, secondXIndex));
+                screenHeight = Integer.valueOf(firstArg.substring(secondXIndex + 1, firstArg.length()));
+
+                for (int i = 1; i < args.length; ++i) {
+                    jvmArgs.add(args[i]);
+                }
+            } catch (IndexOutOfBoundsException | NumberFormatException ignored) {
+                usage();
+                throw new RuntimeException("Error parsing the first argument of the test driver");
+            }
+        } else {
+            jvmArgs.addAll(Arrays.asList(args));
+        }
+
+        final String socketName = SOCKET_NAME_PREFIX + ProcessHandle.current().pid();
+        final Process westonProcess = launchWeston(nScreens, screenWidth, screenHeight, socketName);
+        try {
+            System.out.println("Running test with WAYLAND_DISPLAY=" + socketName);
+            final ProcessBuilder pb = ProcessTools.createTestJvm(jvmArgs);
+            final Map<String, String> env = pb.environment();
+            env.put("WAYLAND_DISPLAY", socketName);
+
+            final Process p = pb.start();
+            final OutputAnalyzer output = new OutputAnalyzer(p);
+            final boolean exited = p.waitFor(TEST_TIMEOUT_SECONDS, TimeUnit.SECONDS);
+            if (!exited) p.destroy();
+            System.out.println("Test finished. Output: [[[");
+            System.out.println(output.getOutput());
+            System.out.println("]]]");
+            if (!exited) {
+                throw new RuntimeException("Test timed out after " + TEST_TIMEOUT_SECONDS + " seconds");
+            }
+
+            if (exited && output.getExitValue() != 0) {
+                throw new RuntimeException("Test finished with non-zero exit code");
+            }
+        } finally {
+            if (westonProcess != null) {
+                final OutputAnalyzer westonOutput = new OutputAnalyzer(westonProcess);
+                westonProcess.destroy();
+
+                System.out.println("Weston output: [[[");
+                System.out.println(westonOutput.getOutput());
+                System.out.println("]]]");
+            }
+        }
+    }
+
+    static void checkEnv(Map<String, String> env) {
+        if (!env.containsKey("DISPLAY")) {
+            throw new RuntimeException("DISPLAY environment variable must be set to run this test driver");
+        }
+
+        if (!env.containsKey("XDG_RUNTIME_DIR")) {
+            throw new RuntimeException("XDG_RUNTIME_DIR environment variable must be set to run this test driver; pass -e:XDG_RUNTIME_DIR to jtreg");
+        }
+
+        if (!env.containsKey("LIBWAKEFIELD")) {
+            throw new RuntimeException("Set LIBWAKEFIELD environment variable to full path to libwakefield.so");
+        }
+
+        if (!Files.exists(Path.of(env.get("LIBWAKEFIELD")))) {
+            throw new RuntimeException("LIBWAKEFIELD (" + env.get("LIBWAKEFIELD") + " does not point to an executable");
+        }
+    }
+
+    static final String SOCKET_NAME_PREFIX = "wakefield-";
+
+    static Process launchWeston(int nScreens, int width, int height, String socketName) throws IOException {
+        final List<String> args = new ArrayList<String>();
+        args.add("weston");
+        args.add("--backend=x11-backend.so");
+        args.add("--socket=" + socketName);
+        args.add("--output-count=" + nScreens);
+        args.add("--width=" + width);
+        args.add("--height=" + height);
+        args.add("--use-pixman");
+        args.add("--idle-time=0");
+        args.add("--logger-scopes=log,wakefield");
+        //args.add("--log=weston-server-log.txt"); // Log to stderr, its easier to manage this way.
+        args.add("--no-config");
+        args.add("--modules=" + System.getenv("LIBWAKEFIELD"));
+
+        System.out.println("Running " + String.join(" ", args));
+
+        return new ProcessBuilder(args).redirectErrorStream(true).start();
+    }
+}
+