JBR-1986 Enabling fractional metrics causes visual artifacts in font rendering on macOS 10.14+

Disable subpixel positioning for macOS 10.13+ if legacy LCD rendering is disabled

(cherry picked from commit dbd24232e4)
(cherry picked from commit 9fbf990e83)

src/java.desktop/macosx/native/libawt_lwawt/awt/LWCToolkit.h

@@ -39,6 +39,8 @@ extern int gNumberOfButtons;
 // InputEvent mask array
 extern jint* gButtonDownMasks;
 
+extern int lcdSubPixelPosSupported;
+
 extern int useFontSmoothing;
 
 @interface AWTToolkit : NSObject { }

src/java.desktop/macosx/native/libawt_lwawt/awt/LWCToolkit.m

@@ -52,6 +52,7 @@
 
 int gNumberOfButtons;
 jint* gButtonDownMasks;
+int lcdSubPixelPosSupported;
 int useFontSmoothing;
 
 // Indicates that the app has been started with -XstartOnFirstThread

src/java.desktop/macosx/native/libawt_lwawt/java2d/opengl/CGLGraphicsConfig.m

@@ -230,6 +230,7 @@ Java_sun_java2d_opengl_CGLGraphicsConfig_getCGLConfigInfo
             CFPreferencesGetAppBooleanValue(
             CFSTR("CGFontRenderingFontSmoothingDisabled"),
             kCFPreferencesCurrentApplication, &status);
+        lcdSubPixelPosSupported = YES;
         useFontSmoothing = NO;
         if (status) {
             if (fontSmoothingDisabled) {
@@ -248,6 +249,7 @@ Java_sun_java2d_opengl_CGLGraphicsConfig_getCGLConfigInfo
             if (!status) {
                 smoothFonts = YES;
             }
+            lcdSubPixelPosSupported = !smoothFonts;
             useFontSmoothing = smoothFonts;
             if (!smoothFonts) {
                 J2dRlsTraceLn(J2D_TRACE_INFO,

src/java.desktop/share/native/common/java2d/opengl/OGLTextRenderer.c

@@ -1171,6 +1171,7 @@ OGLTR_DrawColorGlyphNoCache(OGLContext *oglc, GlyphInfo *ginfo, jint x, jint y)
 
 // Control subpixel positioning for macOS 13+ grayscale glyphs
 #ifdef MACOSX
+extern int lcdSubPixelPosSupported;
 extern int useFontSmoothing;
 #endif