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JetBrainsRuntime/src/java.desktop/unix/native/common/awt/fontpath.c
nikita.gubarkov 62b72beede Text rendering support 
Extracted X11-related code from libfontmanager into libfontmanager_xawt
2022-04-14 16:49:21 +03:00

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/*
* Copyright (c) 1998, 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.
*/
#if defined(__linux__)
#include <string.h>
#endif /* __linux__ */
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <jni.h>
#include <jni_util.h>
#include <jvm_md.h>
#include <sizecalc.h>
#ifndef HEADLESS
#include <X11/Xlib.h>
#include <awt.h>
#else
/* locks ought to be included from awt.h */
#define AWT_LOCK()
#define AWT_UNLOCK()
#endif /* !HEADLESS */
#if defined(__linux__) && !defined(MAP_FAILED)
#define MAP_FAILED ((caddr_t)-1)
#endif
#ifndef HEADLESS
extern Display *awt_display;
#endif /* !HEADLESS */
#define FONTCONFIG_DLL_VERSIONED VERSIONED_JNI_LIB_NAME("fontconfig", "1")
#define FONTCONFIG_DLL JNI_LIB_NAME("fontconfig")
#define MAXFDIRS 512 /* Max number of directories that contain fonts */
#if defined( __linux__)
/* All the known interesting locations we have discovered on
* various flavors of Linux
*/
static char *fullLinuxFontPath[] = {
"/usr/X11R6/lib/X11/fonts/TrueType", /* RH 7.1+ */
"/usr/X11R6/lib/X11/fonts/truetype", /* SuSE */
"/usr/X11R6/lib/X11/fonts/tt",
"/usr/X11R6/lib/X11/fonts/TTF",
"/usr/X11R6/lib/X11/fonts/OTF", /* RH 9.0 (but empty!) */
"/usr/share/fonts/ja/TrueType", /* RH 7.2+ */
"/usr/share/fonts/truetype",
"/usr/share/fonts/ko/TrueType", /* RH 9.0 */
"/usr/share/fonts/zh_CN/TrueType", /* RH 9.0 */
"/usr/share/fonts/zh_TW/TrueType", /* RH 9.0 */
"/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType", /* Debian */
"/usr/X11R6/lib/X11/fonts/Type1",
"/usr/share/fonts/default/Type1", /* RH 9.0 */
NULL, /* terminates the list */
};
#elif defined(_AIX)
static char *fullAixFontPath[] = {
"/usr/lpp/X11/lib/X11/fonts/Type1", /* from X11.fnt.iso_T1 */
"/usr/lpp/X11/lib/X11/fonts/TrueType", /* from X11.fnt.ucs.ttf */
NULL, /* terminates the list */
};
#endif
static char **getFontConfigLocations();
typedef struct {
const char *name[MAXFDIRS];
int num;
} fDirRecord, *fDirRecordPtr;
#ifdef XAWT
/*
* Returns True if display is local, False of it's remote.
*/
jboolean isDisplayLocal(JNIEnv *env) {
static jboolean isLocal = False;
static jboolean isLocalSet = False;
jboolean ret;
if (! isLocalSet) {
jclass geCls = (*env)->FindClass(env, "java/awt/GraphicsEnvironment");
CHECK_NULL_RETURN(geCls, JNI_FALSE);
jmethodID getLocalGE = (*env)->GetStaticMethodID(env, geCls,
"getLocalGraphicsEnvironment",
"()Ljava/awt/GraphicsEnvironment;");
CHECK_NULL_RETURN(getLocalGE, JNI_FALSE);
jobject ge = (*env)->CallStaticObjectMethod(env, geCls, getLocalGE);
JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
jclass sgeCls = (*env)->FindClass(env,
"sun/java2d/SunGraphicsEnvironment");
CHECK_NULL_RETURN(sgeCls, JNI_FALSE);
if ((*env)->IsInstanceOf(env, ge, sgeCls)) {
jmethodID isDisplayLocal = (*env)->GetMethodID(env, sgeCls,
"isDisplayLocal",
"()Z");
JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
isLocal = (*env)->CallBooleanMethod(env, ge, isDisplayLocal);
JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
} else {
isLocal = True;
}
isLocalSet = True;
}
return isLocal;
}
static char **getX11FontPath ()
{
char **x11Path, **fontdirs;
int i, pos, slen, nPaths, numDirs;
x11Path = XGetFontPath (awt_display, &nPaths);
/* This isn't ever going to be perfect: the font path may contain
* much we aren't interested in, but the cost should be moderate
* Exclude all directories that contain the strings "Speedo","/F3/",
* "75dpi", "100dpi", "misc" or "bitmap", or don't begin with a "/",
* the last of which should exclude font servers.
* Also exclude the user specific ".gnome*" directories which
* aren't going to contain the system fonts we need.
* Hopefully we are left only with Type1 and TrueType directories.
* It doesn't matter much if there are extraneous directories, it'll just
* cost us a little wasted effort upstream.
*/
fontdirs = (char**)calloc(nPaths+1, sizeof(char*));
if (fontdirs == NULL) {
return NULL;
}
pos = 0;
for (i=0; i < nPaths; i++) {
if (x11Path[i][0] != '/') {
continue;
}
if (strstr(x11Path[i], "/75dpi") != NULL) {
continue;
}
if (strstr(x11Path[i], "/100dpi") != NULL) {
continue;
}
if (strstr(x11Path[i], "/misc") != NULL) {
continue;
}
if (strstr(x11Path[i], "/Speedo") != NULL) {
continue;
}
if (strstr(x11Path[i], ".gnome") != NULL) {
continue;
}
fontdirs[pos] = strdup(x11Path[i]);
slen = strlen(fontdirs[pos]);
if (slen > 0 && fontdirs[pos][slen-1] == '/') {
fontdirs[pos][slen-1] = '\0'; /* null out trailing "/" */
}
pos++;
}
XFreeFontPath(x11Path);
if (pos == 0) {
free(fontdirs);
fontdirs = NULL;
}
return fontdirs;
}
#endif /* XAWT */
#if defined(__linux__)
/* from awt_LoadLibrary.c */
JNIEXPORT jboolean JNICALL AWTIsHeadless();
#endif
/* This eliminates duplicates, at a non-linear but acceptable cost
* since the lists are expected to be reasonably short, and then
* deletes references to non-existent directories, and returns
* a single path consisting of unique font directories.
*/
static char* mergePaths(char **p1, char **p2, char **p3, jboolean noType1) {
int len1=0, len2=0, len3=0, totalLen=0, numDirs=0,
currLen, i, j, found, pathLen=0;
char **ptr, **fontdirs;
char *fontPath = NULL;
if (p1 != NULL) {
ptr = p1;
while (*ptr++ != NULL) len1++;
}
if (p2 != NULL) {
ptr = p2;
while (*ptr++ != NULL) len2++;
}
if (p3 != NULL) {
ptr = p3;
while (*ptr++ != NULL) len3++;
}
totalLen = len1+len2+len3;
fontdirs = (char**)calloc(totalLen, sizeof(char*));
if (fontdirs == NULL) {
return NULL;
}
for (i=0; i < len1; i++) {
if (noType1 && strstr(p1[i], "Type1") != NULL) {
continue;
}
fontdirs[numDirs++] = p1[i];
}
currLen = numDirs; /* only compare against previous path dirs */
for (i=0; i < len2; i++) {
if (noType1 && strstr(p2[i], "Type1") != NULL) {
continue;
}
found = 0;
for (j=0; j < currLen; j++) {
if (strcmp(fontdirs[j], p2[i]) == 0) {
found = 1;
break;
}
}
if (!found) {
fontdirs[numDirs++] = p2[i];
}
}
currLen = numDirs; /* only compare against previous path dirs */
for (i=0; i < len3; i++) {
if (noType1 && strstr(p3[i], "Type1") != NULL) {
continue;
}
found = 0;
for (j=0; j < currLen; j++) {
if (strcmp(fontdirs[j], p3[i]) == 0) {
found = 1;
break;
}
}
if (!found) {
fontdirs[numDirs++] = p3[i];
}
}
/* Now fontdirs contains unique dirs and numDirs records how many.
* What we don't know is if they all exist. On reflection I think
* this isn't an issue, so for now I will return all these locations,
* converted to one string */
for (i=0; i<numDirs; i++) {
pathLen += (strlen(fontdirs[i]) + 1);
}
if (pathLen > 0 && (fontPath = malloc(pathLen))) {
*fontPath = '\0';
for (i = 0; i<numDirs; i++) {
if (i != 0) {
strcat(fontPath, ":");
}
strcat(fontPath, fontdirs[i]);
}
}
free (fontdirs);
return fontPath;
}
/*
* The goal of this function is to find all "system" fonts which
* are needed by the JRE to display text in supported locales etc, and
* to support APIs which allow users to enumerate all system fonts and use
* them from their Java applications.
* The preferred mechanism is now using the new "fontconfig" library
* This exists on newer versions of Linux and Solaris (S10 and above)
* The library is dynamically located. The results are merged with
* a set of "known" locations and with the X11 font path, if running in
* a local X11 environment.
* The hardwired paths are built into the JDK binary so as new font locations
* are created on a host plaform for them to be located by the JRE they will
* need to be added ito the host's font configuration database, typically
* /etc/fonts/local.conf, and to ensure that directory contains a fonts.dir
* NB: Fontconfig also depends heavily for performance on the host O/S
* maintaining up to date caches.
* This is consistent with the requirements of the desktop environments
* on these OSes.
* This also frees us from X11 APIs as JRE is required to function in
* a "headless" mode where there is no Xserver.
*/
static char *getPlatformFontPathChars(JNIEnv *env, jboolean noType1, jboolean isX11) {
char **fcdirs = NULL, **x11dirs = NULL, **knowndirs = NULL, *path = NULL;
/* As of 1.5 we try to use fontconfig on both Solaris and Linux.
* If its not available NULL is returned.
*/
fcdirs = getFontConfigLocations();
#if defined(__linux__)
knowndirs = fullLinuxFontPath;
#elif defined(_AIX)
knowndirs = fullAixFontPath;
#endif
/* REMIND: this code requires to be executed when the GraphicsEnvironment
* is already initialised. That is always true, but if it were not so,
* this code could throw an exception and the fontpath would fail to
* be initialised.
*/
#ifdef XAWT
if (isX11) { // The following only works in an x11 environment.
#if defined(__linux__)
/* There's no headless build on linux ... */
if (!AWTIsHeadless()) { /* .. so need to call a function to check */
#endif
/* Using the X11 font path to locate font files is now a fallback
* useful only if fontconfig failed, or is incomplete. So we could
* remove this code completely and the consequences should be rare
* and non-fatal. If this happens, then the calling Java code can
* be modified to no longer require that the AWT lock (the X11GE)
* be initialised prior to calling this code.
*/
AWT_LOCK();
if (isDisplayLocal(env)) {
x11dirs = getX11FontPath();
}
AWT_UNLOCK();
#if defined(__linux__)
}
#endif
}
#endif /* XAWT */
path = mergePaths(fcdirs, x11dirs, knowndirs, noType1);
if (fcdirs != NULL) {
char **p = fcdirs;
while (*p != NULL) free(*p++);
free(fcdirs);
}
if (x11dirs != NULL) {
char **p = x11dirs;
while (*p != NULL) free(*p++);
free(x11dirs);
}
return path;
}
JNIEXPORT jstring JNICALL Java_sun_awt_FcFontManager_getFontPathNative
(JNIEnv *env, jobject thiz, jboolean noType1, jboolean isX11) {
jstring ret;
static char *ptr = NULL; /* retain result across calls */
if (ptr == NULL) {
ptr = getPlatformFontPathChars(env, noType1, isX11);
}
ret = (*env)->NewStringUTF(env, ptr);
return ret;
}
#include <dlfcn.h>
#include <fontconfig/fontconfig.h>
static void* openFontConfig() {
char *homeEnv;
static char *homeEnvStr = "HOME="; /* must be static */
void* libfontconfig = NULL;
/* Private workaround to not use fontconfig library.
* May be useful during testing/debugging
*/
char *useFC = getenv("USE_J2D_FONTCONFIG");
if (useFC != NULL && !strcmp(useFC, "no")) {
return NULL;
}
#if defined(_AIX)
/* On AIX, fontconfig is not a standard package supported by IBM.
* instead it has to be installed from the "AIX Toolbox for Linux Applications"
* site http://www-03.ibm.com/systems/power/software/aix/linux/toolbox/alpha.html
* and will be installed under /opt/freeware/lib/libfontconfig.a.
* Notice that the archive contains the real 32- and 64-bit shared libraries.
* We first try to load 'libfontconfig.so' from the default library path in the
* case the user has installed a private version of the library and if that
* doesn't succeed, we try the version from /opt/freeware/lib/libfontconfig.a
*/
libfontconfig = dlopen("libfontconfig.so", RTLD_LOCAL|RTLD_LAZY);
if (libfontconfig == NULL) {
libfontconfig = dlopen("/opt/freeware/lib/libfontconfig.a(libfontconfig.so.1)", RTLD_MEMBER|RTLD_LOCAL|RTLD_LAZY);
if (libfontconfig == NULL) {
return NULL;
}
}
#else
/* 64 bit sparc should pick up the right version from the lib path.
* New features may be added to libfontconfig, this is expected to
* be compatible with old features, but we may need to start
* distinguishing the library version, to know whether to expect
* certain symbols - and functionality - to be available.
* Also add explicit search for .so.1 in case .so symlink doesn't exist.
*/
libfontconfig = dlopen(FONTCONFIG_DLL_VERSIONED, RTLD_LOCAL|RTLD_LAZY);
if (libfontconfig == NULL) {
libfontconfig = dlopen(FONTCONFIG_DLL, RTLD_LOCAL|RTLD_LAZY);
if (libfontconfig == NULL) {
return NULL;
}
}
#endif
/* Version 1.0 of libfontconfig crashes if HOME isn't defined in
* the environment. This should generally never happen, but we can't
* control it, and can't control the version of fontconfig, so iff
* its not defined we set it to an empty value which is sufficient
* to prevent a crash. I considered unsetting it before exit, but
* it doesn't appear to work on Solaris, so I will leave it set.
*/
homeEnv = getenv("HOME");
if (homeEnv == NULL) {
putenv(homeEnvStr);
}
return libfontconfig;
}
typedef void* (FcFiniFuncType)();
static void closeFontConfig(void* libfontconfig, jboolean fcFini) {
/* NB FcFini is not in (eg) the Solaris 10 version of fontconfig. Its not
* clear if this means we are really leaking resources in those cases
* but it seems we should call this function when its available.
* But since the Swing GTK code may be still accessing the lib, its probably
* safest for now to just let this "leak" rather than potentially
* concurrently free global data still in use by other code.
*/
#if 0
if (fcFini) { /* release resources */
FcFiniFuncType FcFini = (FcFiniFuncType)dlsym(libfontconfig, "FcFini");
if (FcFini != NULL) {
(*FcFini)();
}
}
#endif
dlclose(libfontconfig);
}
typedef FcConfig* (*FcInitLoadConfigFuncType)();
typedef FcPattern* (*FcPatternBuildFuncType)(FcPattern *orig, ...);
typedef FcObjectSet* (*FcObjectSetFuncType)(const char *first, ...);
typedef FcFontSet* (*FcFontListFuncType)(FcConfig *config,
FcPattern *p,
FcObjectSet *os);
typedef FcResult (*FcPatternGetBoolFuncType)(const FcPattern *p,
const char *object,
int n,
FcBool *b);
typedef FcResult (*FcPatternGetIntegerFuncType)(const FcPattern *p,
const char *object,
int n,
int *i);
typedef FcResult (*FcPatternGetStringFuncType)(const FcPattern *p,
const char *object,
int n,
FcChar8 ** s);
typedef FcChar8* (*FcStrDirnameFuncType)(const FcChar8 *file);
typedef void (*FcPatternDestroyFuncType)(FcPattern *p);
typedef void (*FcFontSetDestroyFuncType)(FcFontSet *s);
typedef FcPattern* (*FcNameParseFuncType)(const FcChar8 *name);
typedef FcBool (*FcPatternAddStringFuncType)(FcPattern *p,
const char *object,
const FcChar8 *s);
typedef void (*FcDefaultSubstituteFuncType)(FcPattern *p);
typedef FcBool (*FcConfigSubstituteFuncType)(FcConfig *config,
FcPattern *p,
FcMatchKind kind);
typedef FcPattern* (*FcFontMatchFuncType)(FcConfig *config,
FcPattern *p,
FcResult *result);
typedef FcFontSet* (*FcFontSetCreateFuncType)();
typedef FcBool (*FcFontSetAddFuncType)(FcFontSet *s, FcPattern *font);
typedef FcResult (*FcPatternGetCharSetFuncType)(FcPattern *p,
const char *object,
int n,
FcCharSet **c);
typedef FcFontSet* (*FcFontSortFuncType)(FcConfig *config,
FcPattern *p,
FcBool trim,
FcCharSet **csp,
FcResult *result);
typedef FcCharSet* (*FcCharSetUnionFuncType)(const FcCharSet *a,
const FcCharSet *b);
typedef FcChar32 (*FcCharSetSubtractCountFuncType)(const FcCharSet *a,
const FcCharSet *b);
typedef int (*FcGetVersionFuncType)();
typedef FcStrList* (*FcConfigGetCacheDirsFuncType)(FcConfig *config);
typedef FcChar8* (*FcStrListNextFuncType)(FcStrList *list);
typedef FcChar8* (*FcStrListDoneFuncType)(FcStrList *list);
static char **getFontConfigLocations() {
char **fontdirs;
int numdirs = 0;
FcInitLoadConfigFuncType FcInitLoadConfig;
FcPatternBuildFuncType FcPatternBuild;
FcObjectSetFuncType FcObjectSetBuild;
FcFontListFuncType FcFontList;
FcPatternGetStringFuncType FcPatternGetString;
FcStrDirnameFuncType FcStrDirname;
FcPatternDestroyFuncType FcPatternDestroy;
FcFontSetDestroyFuncType FcFontSetDestroy;
FcConfig *fontconfig;
FcPattern *pattern;
FcObjectSet *objset;
FcFontSet *fontSet;
FcStrList *strList;
FcChar8 *str;
int i, f, found, len=0;
char **fontPath;
void* libfontconfig = openFontConfig();
if (libfontconfig == NULL) {
return NULL;
}
FcPatternBuild =
(FcPatternBuildFuncType)dlsym(libfontconfig, "FcPatternBuild");
FcObjectSetBuild =
(FcObjectSetFuncType)dlsym(libfontconfig, "FcObjectSetBuild");
FcFontList =
(FcFontListFuncType)dlsym(libfontconfig, "FcFontList");
FcPatternGetString =
(FcPatternGetStringFuncType)dlsym(libfontconfig, "FcPatternGetString");
FcStrDirname =
(FcStrDirnameFuncType)dlsym(libfontconfig, "FcStrDirname");
FcPatternDestroy =
(FcPatternDestroyFuncType)dlsym(libfontconfig, "FcPatternDestroy");
FcFontSetDestroy =
(FcFontSetDestroyFuncType)dlsym(libfontconfig, "FcFontSetDestroy");
if (FcPatternBuild == NULL ||
FcObjectSetBuild == NULL ||
FcPatternGetString == NULL ||
FcFontList == NULL ||
FcStrDirname == NULL ||
FcPatternDestroy == NULL ||
FcFontSetDestroy == NULL) { /* problem with the library: return. */
closeFontConfig(libfontconfig, JNI_FALSE);
return NULL;
}
/* Make calls into the fontconfig library to build a search for
* outline fonts, and to get the set of full file paths from the matches.
* This set is returned from the call to FcFontList(..)
* We allocate an array of char* pointers sufficient to hold all
* the matches + 1 extra which ensures there will be a NULL after all
* valid entries.
* We call FcStrDirname strip the file name from the path, and
* check if we have yet seen this directory. If not we add a pointer to
* it into our array of char*. Note that FcStrDirname returns newly
* allocated storage so we can use this in the return char** value.
* Finally we clean up, freeing allocated resources, and return the
* array of unique directories.
*/
pattern = (*FcPatternBuild)(NULL, FC_OUTLINE, FcTypeBool, FcTrue, NULL);
objset = (*FcObjectSetBuild)(FC_FILE, NULL);
fontSet = (*FcFontList)(NULL, pattern, objset);
if (fontSet == NULL) {
/* FcFontList() may return NULL if fonts are not installed. */
fontdirs = NULL;
} else {
fontdirs = (char**)calloc(fontSet->nfont+1, sizeof(char*));
if (fontdirs == NULL) {
(*FcFontSetDestroy)(fontSet);
goto cleanup;
}
for (f=0; f < fontSet->nfont; f++) {
FcChar8 *file;
FcChar8 *dir;
if ((*FcPatternGetString)(fontSet->fonts[f], FC_FILE, 0, &file) ==
FcResultMatch) {
dir = (*FcStrDirname)(file);
found = 0;
for (i=0;i<numdirs; i++) {
if (strcmp(fontdirs[i], (char*)dir) == 0) {
found = 1;
break;
}
}
if (!found) {
fontdirs[numdirs++] = (char*)dir;
} else {
free((char*)dir);
}
}
}
/* Free fontset if one was returned */
(*FcFontSetDestroy)(fontSet);
}
cleanup:
/* Free memory and close the ".so" */
(*FcPatternDestroy)(pattern);
closeFontConfig(libfontconfig, JNI_TRUE);
return fontdirs;
}
/* These are copied from sun.awt.SunHints.
* Consider initialising them as ints using JNI for more robustness.
*/
#define TEXT_AA_OFF 1
#define TEXT_AA_ON 2
#define TEXT_AA_LCD_HRGB 4
#define TEXT_AA_LCD_HBGR 5
#define TEXT_AA_LCD_VRGB 6
#define TEXT_AA_LCD_VBGR 7
JNIEXPORT jint JNICALL
Java_sun_font_FontConfigManager_getFontConfigAASettings
(JNIEnv *env, jclass obj, jstring localeStr, jstring fcNameStr) {
FcNameParseFuncType FcNameParse;
FcPatternAddStringFuncType FcPatternAddString;
FcConfigSubstituteFuncType FcConfigSubstitute;
FcDefaultSubstituteFuncType FcDefaultSubstitute;
FcFontMatchFuncType FcFontMatch;
FcPatternGetBoolFuncType FcPatternGetBool;
FcPatternGetIntegerFuncType FcPatternGetInteger;
FcPatternDestroyFuncType FcPatternDestroy;
FcPattern *pattern, *matchPattern;
FcResult result;
FcBool antialias = FcFalse;
int rgba = 0;
const char *locale=NULL, *fcName=NULL;
void* libfontconfig;
if (fcNameStr == NULL || localeStr == NULL) {
return -1;
}
fcName = (*env)->GetStringUTFChars(env, fcNameStr, 0);
if (fcName == NULL) {
return -1;
}
locale = (*env)->GetStringUTFChars(env, localeStr, 0);
if ((libfontconfig = openFontConfig()) == NULL) {
(*env)->ReleaseStringUTFChars(env, fcNameStr, (const char*)fcName);
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr,(const char*)locale);
}
return -1;
}
FcNameParse = (FcNameParseFuncType)dlsym(libfontconfig, "FcNameParse");
FcPatternAddString =
(FcPatternAddStringFuncType)dlsym(libfontconfig, "FcPatternAddString");
FcConfigSubstitute =
(FcConfigSubstituteFuncType)dlsym(libfontconfig, "FcConfigSubstitute");
FcDefaultSubstitute = (FcDefaultSubstituteFuncType)
dlsym(libfontconfig, "FcDefaultSubstitute");
FcFontMatch = (FcFontMatchFuncType)dlsym(libfontconfig, "FcFontMatch");
FcPatternGetBool = (FcPatternGetBoolFuncType)
dlsym(libfontconfig, "FcPatternGetBool");
FcPatternGetInteger = (FcPatternGetIntegerFuncType)
dlsym(libfontconfig, "FcPatternGetInteger");
FcPatternDestroy =
(FcPatternDestroyFuncType)dlsym(libfontconfig, "FcPatternDestroy");
if (FcNameParse == NULL ||
FcPatternAddString == NULL ||
FcConfigSubstitute == NULL ||
FcDefaultSubstitute == NULL ||
FcFontMatch == NULL ||
FcPatternGetBool == NULL ||
FcPatternGetInteger == NULL ||
FcPatternDestroy == NULL) { /* problem with the library: return. */
(*env)->ReleaseStringUTFChars(env, fcNameStr, (const char*)fcName);
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr,(const char*)locale);
}
closeFontConfig(libfontconfig, JNI_FALSE);
return -1;
}
pattern = (*FcNameParse)((FcChar8 *)fcName);
if (locale != NULL) {
(*FcPatternAddString)(pattern, FC_LANG, (unsigned char*)locale);
}
(*FcConfigSubstitute)(NULL, pattern, FcMatchPattern);
(*FcDefaultSubstitute)(pattern);
matchPattern = (*FcFontMatch)(NULL, pattern, &result);
/* Perhaps should call FcFontRenderPrepare() here as some pattern
* elements might change as a result of that call, but I'm not seeing
* any difference in testing.
*/
if (matchPattern) {
(*FcPatternGetBool)(matchPattern, FC_ANTIALIAS, 0, &antialias);
(*FcPatternGetInteger)(matchPattern, FC_RGBA, 0, &rgba);
(*FcPatternDestroy)(matchPattern);
}
(*FcPatternDestroy)(pattern);
(*env)->ReleaseStringUTFChars(env, fcNameStr, (const char*)fcName);
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr, (const char*)locale);
}
closeFontConfig(libfontconfig, JNI_TRUE);
if (antialias == FcFalse) {
return TEXT_AA_OFF;
} else if (rgba <= FC_RGBA_UNKNOWN || rgba >= FC_RGBA_NONE) {
return TEXT_AA_ON;
} else {
switch (rgba) {
case FC_RGBA_RGB : return TEXT_AA_LCD_HRGB;
case FC_RGBA_BGR : return TEXT_AA_LCD_HBGR;
case FC_RGBA_VRGB : return TEXT_AA_LCD_VRGB;
case FC_RGBA_VBGR : return TEXT_AA_LCD_VBGR;
default : return TEXT_AA_LCD_HRGB; // should not get here.
}
}
}
JNIEXPORT jint JNICALL
Java_sun_font_FontConfigManager_getFontConfigVersion
(JNIEnv *env, jclass obj) {
void* libfontconfig;
FcGetVersionFuncType FcGetVersion;
int version = 0;
if ((libfontconfig = openFontConfig()) == NULL) {
return 0;
}
FcGetVersion = (FcGetVersionFuncType)dlsym(libfontconfig, "FcGetVersion");
if (FcGetVersion == NULL) {
closeFontConfig(libfontconfig, JNI_FALSE);
return 0;
}
version = (*FcGetVersion)();
closeFontConfig(libfontconfig, JNI_FALSE);
return version;
}
JNIEXPORT void JNICALL
Java_sun_font_FontConfigManager_getFontConfig
(JNIEnv *env, jclass obj, jstring localeStr, jobject fcInfoObj,
jobjectArray fcCompFontArray, jboolean includeFallbacks) {
FcNameParseFuncType FcNameParse;
FcPatternAddStringFuncType FcPatternAddString;
FcConfigSubstituteFuncType FcConfigSubstitute;
FcDefaultSubstituteFuncType FcDefaultSubstitute;
FcFontMatchFuncType FcFontMatch;
FcPatternGetStringFuncType FcPatternGetString;
FcPatternDestroyFuncType FcPatternDestroy;
FcPatternGetCharSetFuncType FcPatternGetCharSet;
FcFontSortFuncType FcFontSort;
FcFontSetDestroyFuncType FcFontSetDestroy;
FcCharSetUnionFuncType FcCharSetUnion;
FcCharSetSubtractCountFuncType FcCharSetSubtractCount;
FcGetVersionFuncType FcGetVersion;
FcConfigGetCacheDirsFuncType FcConfigGetCacheDirs;
FcStrListNextFuncType FcStrListNext;
FcStrListDoneFuncType FcStrListDone;
int i, arrlen;
jobject fcCompFontObj;
jstring fcNameStr, jstr;
const char *locale, *fcName;
FcPattern *pattern;
FcResult result;
void* libfontconfig;
jfieldID fcNameID, fcFirstFontID, fcAllFontsID, fcVersionID, fcCacheDirsID;
jfieldID familyNameID, styleNameID, fullNameID, fontFileID;
jmethodID fcFontCons;
char* debugMinGlyphsStr = getenv("J2D_DEBUG_MIN_GLYPHS");
jclass fcInfoClass;
jclass fcCompFontClass;
jclass fcFontClass;
CHECK_NULL(fcInfoObj);
CHECK_NULL(fcCompFontArray);
fcInfoClass =
(*env)->FindClass(env, "sun/font/FontConfigManager$FontConfigInfo");
CHECK_NULL(fcInfoClass);
fcCompFontClass =
(*env)->FindClass(env, "sun/font/FontConfigManager$FcCompFont");
CHECK_NULL(fcCompFontClass);
fcFontClass =
(*env)->FindClass(env, "sun/font/FontConfigManager$FontConfigFont");
CHECK_NULL(fcFontClass);
CHECK_NULL(fcVersionID = (*env)->GetFieldID(env, fcInfoClass, "fcVersion", "I"));
CHECK_NULL(fcCacheDirsID = (*env)->GetFieldID(env, fcInfoClass, "cacheDirs",
"[Ljava/lang/String;"));
CHECK_NULL(fcNameID = (*env)->GetFieldID(env, fcCompFontClass,
"fcName", "Ljava/lang/String;"));
CHECK_NULL(fcFirstFontID = (*env)->GetFieldID(env, fcCompFontClass, "firstFont",
"Lsun/font/FontConfigManager$FontConfigFont;"));
CHECK_NULL(fcAllFontsID = (*env)->GetFieldID(env, fcCompFontClass, "allFonts",
"[Lsun/font/FontConfigManager$FontConfigFont;"));
CHECK_NULL(fcFontCons = (*env)->GetMethodID(env, fcFontClass, "<init>", "()V"));
CHECK_NULL(familyNameID = (*env)->GetFieldID(env, fcFontClass,
"familyName", "Ljava/lang/String;"));
CHECK_NULL(styleNameID = (*env)->GetFieldID(env, fcFontClass,
"styleStr", "Ljava/lang/String;"));
CHECK_NULL(fullNameID = (*env)->GetFieldID(env, fcFontClass,
"fullName", "Ljava/lang/String;"));
CHECK_NULL(fontFileID = (*env)->GetFieldID(env, fcFontClass,
"fontFile", "Ljava/lang/String;"));
if ((libfontconfig = openFontConfig()) == NULL) {
return;
}
FcNameParse = (FcNameParseFuncType)dlsym(libfontconfig, "FcNameParse");
FcPatternAddString =
(FcPatternAddStringFuncType)dlsym(libfontconfig, "FcPatternAddString");
FcConfigSubstitute =
(FcConfigSubstituteFuncType)dlsym(libfontconfig, "FcConfigSubstitute");
FcDefaultSubstitute = (FcDefaultSubstituteFuncType)
dlsym(libfontconfig, "FcDefaultSubstitute");
FcFontMatch = (FcFontMatchFuncType)dlsym(libfontconfig, "FcFontMatch");
FcPatternGetString =
(FcPatternGetStringFuncType)dlsym(libfontconfig, "FcPatternGetString");
FcPatternDestroy =
(FcPatternDestroyFuncType)dlsym(libfontconfig, "FcPatternDestroy");
FcPatternGetCharSet =
(FcPatternGetCharSetFuncType)dlsym(libfontconfig,
"FcPatternGetCharSet");
FcFontSort =
(FcFontSortFuncType)dlsym(libfontconfig, "FcFontSort");
FcFontSetDestroy =
(FcFontSetDestroyFuncType)dlsym(libfontconfig, "FcFontSetDestroy");
FcCharSetUnion =
(FcCharSetUnionFuncType)dlsym(libfontconfig, "FcCharSetUnion");
FcCharSetSubtractCount =
(FcCharSetSubtractCountFuncType)dlsym(libfontconfig,
"FcCharSetSubtractCount");
FcGetVersion = (FcGetVersionFuncType)dlsym(libfontconfig, "FcGetVersion");
if (FcNameParse == NULL ||
FcPatternAddString == NULL ||
FcConfigSubstitute == NULL ||
FcDefaultSubstitute == NULL ||
FcFontMatch == NULL ||
FcPatternGetString == NULL ||
FcPatternDestroy == NULL ||
FcPatternGetCharSet == NULL ||
FcFontSetDestroy == NULL ||
FcCharSetUnion == NULL ||
FcGetVersion == NULL ||
FcCharSetSubtractCount == NULL) {/* problem with the library: return.*/
closeFontConfig(libfontconfig, JNI_FALSE);
return;
}
(*env)->SetIntField(env, fcInfoObj, fcVersionID, (*FcGetVersion)());
/* Optionally get the cache dir locations. This isn't
* available until v 2.4.x, but this is OK since on those later versions
* we can check the time stamps on the cache dirs to see if we
* are out of date. There are a couple of assumptions here. First
* that the time stamp on the directory changes when the contents are
* updated. Secondly that the locations don't change. The latter is
* most likely if a new version of fontconfig is installed, but we also
* invalidate the cache if we detect that. Arguably even that is "rare",
* and most likely is tied to an OS upgrade which gets a new file anyway.
*/
FcConfigGetCacheDirs =
(FcConfigGetCacheDirsFuncType)dlsym(libfontconfig,
"FcConfigGetCacheDirs");
FcStrListNext =
(FcStrListNextFuncType)dlsym(libfontconfig, "FcStrListNext");
FcStrListDone =
(FcStrListDoneFuncType)dlsym(libfontconfig, "FcStrListDone");
if (FcStrListNext != NULL && FcStrListDone != NULL &&
FcConfigGetCacheDirs != NULL) {
FcStrList* cacheDirs;
FcChar8* cacheDir;
int cnt = 0;
jobject cacheDirArray =
(*env)->GetObjectField(env, fcInfoObj, fcCacheDirsID);
int max = (*env)->GetArrayLength(env, cacheDirArray);
cacheDirs = (*FcConfigGetCacheDirs)(NULL);
if (cacheDirs != NULL) {
while ((cnt < max) && (cacheDir = (*FcStrListNext)(cacheDirs))) {
jstr = (*env)->NewStringUTF(env, (const char*)cacheDir);
JNU_CHECK_EXCEPTION(env);
(*env)->SetObjectArrayElement(env, cacheDirArray, cnt++, jstr);
(*env)->DeleteLocalRef(env, jstr);
}
(*FcStrListDone)(cacheDirs);
}
}
locale = (*env)->GetStringUTFChars(env, localeStr, 0);
if (locale == NULL) {
(*env)->ExceptionClear(env);
JNU_ThrowOutOfMemoryError(env, "Could not create locale");
return;
}
arrlen = (*env)->GetArrayLength(env, fcCompFontArray);
for (i=0; i<arrlen; i++) {
FcFontSet* fontset;
int fn, j, fontCount, nfonts;
unsigned int minGlyphs;
FcChar8 **family, **styleStr, **fullname, **file;
jarray fcFontArr = NULL;
FcCharSet *unionCharset = NULL;
fcCompFontObj = (*env)->GetObjectArrayElement(env, fcCompFontArray, i);
fcNameStr =
(jstring)((*env)->GetObjectField(env, fcCompFontObj, fcNameID));
fcName = (*env)->GetStringUTFChars(env, fcNameStr, 0);
if (fcName == NULL) {
(*env)->DeleteLocalRef(env, fcCompFontObj);
(*env)->DeleteLocalRef(env, fcNameStr);
continue;
}
pattern = (*FcNameParse)((FcChar8 *)fcName);
(*env)->ReleaseStringUTFChars(env, fcNameStr, (const char*)fcName);
(*env)->DeleteLocalRef(env, fcNameStr);
if (pattern == NULL) {
closeFontConfig(libfontconfig, JNI_FALSE);
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr, (const char*)locale);
}
return;
}
/* locale may not usually be necessary as fontconfig appears to apply
* this anyway based on the user's environment. However we want
* to use the value of the JDK startup locale so this should take
* care of it.
*/
if (locale != NULL) {
(*FcPatternAddString)(pattern, FC_LANG, (unsigned char*)locale);
}
(*FcConfigSubstitute)(NULL, pattern, FcMatchPattern);
(*FcDefaultSubstitute)(pattern);
fontset = (*FcFontSort)(NULL, pattern, FcTrue, NULL, &result);
if (fontset == NULL) {
(*FcPatternDestroy)(pattern);
closeFontConfig(libfontconfig, JNI_FALSE);
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr, (const char*)locale);
}
return;
}
/* fontconfig returned us "nfonts". If we are just getting the
* first font, we set nfont to zero. Otherwise we use "nfonts".
* Next create separate C arrrays of length nfonts for family file etc.
* Inspect the returned fonts and the ones we like (adds enough glyphs)
* are added to the arrays and we increment 'fontCount'.
*/
nfonts = fontset->nfont;
family = (FcChar8**)calloc(nfonts, sizeof(FcChar8*));
styleStr = (FcChar8**)calloc(nfonts, sizeof(FcChar8*));
fullname = (FcChar8**)calloc(nfonts, sizeof(FcChar8*));
file = (FcChar8**)calloc(nfonts, sizeof(FcChar8*));
if (family == NULL || styleStr == NULL ||
fullname == NULL || file == NULL) {
if (family != NULL) {
free(family);
}
if (styleStr != NULL) {
free(styleStr);
}
if (fullname != NULL) {
free(fullname);
}
if (file != NULL) {
free(file);
}
(*FcPatternDestroy)(pattern);
(*FcFontSetDestroy)(fontset);
closeFontConfig(libfontconfig, JNI_FALSE);
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr, (const char*)locale);
}
return;
}
fontCount = 0;
minGlyphs = 20;
if (debugMinGlyphsStr != NULL) {
int val = minGlyphs;
sscanf(debugMinGlyphsStr, "%5d", &val);
if (val >= 0 && val <= 65536) {
minGlyphs = val;
}
}
for (j=0; j<nfonts; j++) {
FcPattern *fontPattern = fontset->fonts[j];
FcChar8 *fontformat;
FcCharSet *charset = NULL;
fontformat = NULL;
(*FcPatternGetString)(fontPattern, FC_FONTFORMAT, 0, &fontformat);
/* We only want TrueType fonts but some Linuxes still depend
* on Type 1 fonts for some Locale support, so we'll allow
* them there.
*/
if (fontformat != NULL
&& (strcmp((char*)fontformat, "TrueType") != 0)
#if defined(__linux__) || defined(_AIX)
&& (strcmp((char*)fontformat, "Type 1") != 0)
&& (strcmp((char*)fontformat, "CFF") != 0)
#endif
) {
continue;
}
result = (*FcPatternGetCharSet)(fontPattern,
FC_CHARSET, 0, &charset);
if (result != FcResultMatch) {
free(family);
free(fullname);
free(styleStr);
free(file);
(*FcPatternDestroy)(pattern);
(*FcFontSetDestroy)(fontset);
closeFontConfig(libfontconfig, JNI_FALSE);
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr, (const char*)locale);
}
return;
}
/* We don't want 20 or 30 fonts, so once we hit 10 fonts,
* then require that they really be adding value. Too many
* adversely affects load time for minimal value-add.
* This is still likely far more than we've had in the past.
*/
if (j==10) {
minGlyphs = 50;
}
if (unionCharset == NULL) {
unionCharset = charset;
} else {
if ((*FcCharSetSubtractCount)(charset, unionCharset)
> minGlyphs) {
unionCharset = (* FcCharSetUnion)(unionCharset, charset);
} else {
continue;
}
}
fontCount++; // found a font we will use.
(*FcPatternGetString)(fontPattern, FC_FILE, 0, &file[j]);
(*FcPatternGetString)(fontPattern, FC_FAMILY, 0, &family[j]);
(*FcPatternGetString)(fontPattern, FC_STYLE, 0, &styleStr[j]);
(*FcPatternGetString)(fontPattern, FC_FULLNAME, 0, &fullname[j]);
if (!includeFallbacks) {
break;
}
if (fontCount == 254) {
break; // CompositeFont will only use up to 254 slots from here.
}
}
/* Once we get here 'fontCount' is the number of returned fonts
* we actually want to use, so we create 'fcFontArr' of that length.
* The non-null entries of "family[]" etc are those fonts.
* Then loop again over all nfonts adding just those non-null ones
* to 'fcFontArr'. If its null (we didn't want the font)
* then we don't enter the main body.
* So we should never get more than 'fontCount' entries.
*/
if (includeFallbacks) {
fcFontArr =
(*env)->NewObjectArray(env, fontCount, fcFontClass, NULL);
if (IS_NULL(fcFontArr)) {
free(family);
free(fullname);
free(styleStr);
free(file);
(*FcPatternDestroy)(pattern);
(*FcFontSetDestroy)(fontset);
closeFontConfig(libfontconfig, JNI_FALSE);
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr, (const char*)locale);
}
return;
}
(*env)->SetObjectField(env,fcCompFontObj, fcAllFontsID, fcFontArr);
}
fn=0;
for (j=0;j<nfonts;j++) {
if (family[j] != NULL) {
jobject fcFont =
(*env)->NewObject(env, fcFontClass, fcFontCons);
if (IS_NULL(fcFont)) break;
jstr = (*env)->NewStringUTF(env, (const char*)family[j]);
if (IS_NULL(jstr)) break;
(*env)->SetObjectField(env, fcFont, familyNameID, jstr);
(*env)->DeleteLocalRef(env, jstr);
if (file[j] != NULL) {
jstr = (*env)->NewStringUTF(env, (const char*)file[j]);
if (IS_NULL(jstr)) break;
(*env)->SetObjectField(env, fcFont, fontFileID, jstr);
(*env)->DeleteLocalRef(env, jstr);
}
if (styleStr[j] != NULL) {
jstr = (*env)->NewStringUTF(env, (const char*)styleStr[j]);
if (IS_NULL(jstr)) break;
(*env)->SetObjectField(env, fcFont, styleNameID, jstr);
(*env)->DeleteLocalRef(env, jstr);
}
if (fullname[j] != NULL) {
jstr = (*env)->NewStringUTF(env, (const char*)fullname[j]);
if (IS_NULL(jstr)) break;
(*env)->SetObjectField(env, fcFont, fullNameID, jstr);
(*env)->DeleteLocalRef(env, jstr);
}
if (fn==0) {
(*env)->SetObjectField(env, fcCompFontObj,
fcFirstFontID, fcFont);
}
if (includeFallbacks) {
(*env)->SetObjectArrayElement(env, fcFontArr, fn++,fcFont);
} else {
(*env)->DeleteLocalRef(env, fcFont);
break;
}
(*env)->DeleteLocalRef(env, fcFont);
}
}
if (includeFallbacks) {
(*env)->DeleteLocalRef(env, fcFontArr);
}
(*env)->DeleteLocalRef(env, fcCompFontObj);
(*FcFontSetDestroy)(fontset);
(*FcPatternDestroy)(pattern);
free(family);
free(styleStr);
free(fullname);
free(file);
}
/* release resources and close the ".so" */
if (locale) {
(*env)->ReleaseStringUTFChars(env, localeStr, (const char*)locale);
}
closeFontConfig(libfontconfig, JNI_TRUE);
}
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