Faker: Extend VGL_CHROMEHACK to the GLX interposer

Referring to #264, this allows Chrome to use ANGLE's desktop OpenGL back
end, which generally works better with nVidia's drivers than ANGLE's
OpenGL ES back end.

Author: dcommander

server/faker-egl.cpp

@@ -1,5 +1,5 @@
 // Copyright (C)2005 Sun Microsystems, Inc.
-// Copyright (C)2011, 2014-2015, 2018, 2021-2024 D. R. Commander
+// Copyright (C)2011, 2014-2015, 2018, 2021-2025 D. R. Commander
 //
 // This library is free software and may be redistributed and/or modified under
 // the terms of the wxWindows Library License, Version 3.1 or (at your option)
@@ -122,9 +122,11 @@ static XVisualInfo *getVisualFromConfig(faker::EGLXDisplay *eglxdpy,
 		&& _eglGetConfigAttrib(eglxdpy->edpy, config, EGL_ALPHA_SIZE, &alphaSize)
 		&& alphaSize == 8)
 	{
-		XVisualInfo *v = glxvisual::getHighestScoringVisual(eglxdpy->x11dpy,
-			eglxdpy->screen);
-		if(v) return v;
+		VisualID bestVisualID =
+			glxvisual::getHighestScoringVisualID(eglxdpy->x11dpy, eglxdpy->screen);
+		if(bestVisualID)
+			return glxvisual::visualFromID(eglxdpy->x11dpy, eglxdpy->screen,
+				bestVisualID);
 	}
 
 	return getVisual(eglxdpy->x11dpy, eglxdpy->screen, depth, TrueColor);

server/glxvisual.cpp

@@ -1,6 +1,6 @@
 // Copyright (C)2004 Landmark Graphics Corporation
 // Copyright (C)2005 Sun Microsystems, Inc.
-// Copyright (C)2009-2016, 2019-2024 D. R. Commander
+// Copyright (C)2009-2016, 2019-2025 D. R. Commander
 //
 // This library is free software and may be redistributed and/or modified under
 // the terms of the wxWindows Library License, Version 3.1 or (at your option)
@@ -607,7 +607,10 @@ static void buildCfgAttribTable(Display *dpy, int screen)
 
 		for(int i = 0; i < nConfigs; i++)
 		{
-			ca[i].visualID = matchVisual2D(dpy, screen, &ca[i]);
+			if(fconfig.chromeHack && ca[i].attr.alphaSize == 8)
+				ca[i].visualID = getHighestScoringVisualID(dpy, screen);
+			if(!ca[i].visualID)
+				ca[i].visualID = matchVisual2D(dpy, screen, &ca[i]);
 			if(fconfig.trace && ca[i].visualID)
 				vglout.println("[VGL] FB config 0x%.2x has attached visual 0x%.2x",
 					ca[i].id, (unsigned int)ca[i].visualID);
@@ -1088,9 +1091,9 @@ VGLFBConfig getDefaultFBConfig(Display *dpy, int screen, VisualID vid)
 }
 
 
-XVisualInfo *getHighestScoringVisual(Display *dpy, int screen)
+VisualID getHighestScoringVisualID(Display *dpy, int screen)
 {
-	if(!dpy) return NULL;
+	if(!dpy) return 0;
 
 	int highestScore = -1;
 	VisualID bestVisualID =
@@ -1107,8 +1110,7 @@ XVisualInfo *getHighestScoringVisual(Display *dpy, int screen)
 		}
 	}
 
-	if(bestVisualID) return visualFromID(dpy, screen, bestVisualID);
-	else return NULL;
+	return bestVisualID;
 }
 
 }  // namespace

server/glxvisual.h

@@ -1,6 +1,6 @@
 // Copyright (C)2004 Landmark Graphics Corporation
 // Copyright (C)2005 Sun Microsystems, Inc.
-// Copyright (C)2014, 2019-2021, 2024 D. R. Commander
+// Copyright (C)2014, 2019-2021, 2024-2025 D. R. Commander
 //
 // This library is free software and may be redistributed and/or modified under
 // the terms of the wxWindows Library License, Version 3.1 or (at your option)
@@ -78,7 +78,7 @@ namespace glxvisual
 	// in the visual attribute table.
 	VGLFBConfig getDefaultFBConfig(Display *dpy, int screen, VisualID vid);
 
-	XVisualInfo *getHighestScoringVisual(Display *dpy, int screen);
+	VisualID getHighestScoringVisualID(Display *dpy, int screen);
 }