Bug 735602 - Add possibility to choose EGL backend on Non-Maemo Linux/Qt/Gtk builds instead ofo GLX. r=jgilbert

config/autoconf.mk.in

@@ -203,6 +203,7 @@ MOZ_D3DX9_CAB = @MOZ_D3DX9_CAB@
 MOZ_D3DCOMPILER_CAB = @MOZ_D3DCOMPILER_CAB@
 MOZ_D3DX9_DLL = @MOZ_D3DX9_DLL@
 MOZ_D3DCOMPILER_DLL = @MOZ_D3DCOMPILER_DLL@
+MOZ_GL_PROVIDER = @MOZ_GL_PROVIDER@
 
 
 JAVA="@JAVA@"

configure.in

@@ -4782,7 +4782,7 @@ cairo-gtk2|cairo-gtk2-x11)
     MOZ_ENABLE_GTK2=1
     MOZ_ENABLE_XREMOTE=1
     MOZ_WEBGL=1
-    MOZ_WEBGL_GLX=1
+    MOZ_GL_DEFAULT_PROVIDER=GLX
 
     AC_DEFINE(MOZ_X11)
     MOZ_X11=1
@@ -4800,7 +4800,7 @@ cairo-qt)
     MOZ_ENABLE_QT=1
     if test -z "$WITHOUT_X11"; then
       MOZ_ENABLE_XREMOTE=1
-      MOZ_WEBGL_GLX=1
+      MOZ_GL_DEFAULT_PROVIDER=GLX
       MOZ_X11=1
       AC_DEFINE(MOZ_X11)
       XT_LIBS=
@@ -6737,7 +6737,7 @@ if test $MOZ_PLATFORM_MAEMO; then
    fi
 
    MOZ_GFX_OPTIMIZE_MOBILE=1
-   MOZ_WEBGL_GLX=
+   MOZ_GL_DEFAULT_PROVIDER=EGL
    MOZ_MAEMO_LIBLOCATION=
 
    if test $MOZ_PLATFORM_MAEMO = 5; then
@@ -6864,6 +6864,22 @@ fi
 
 AC_SUBST(MOZ_EGL_XRENDER_COMPOSITE)
 
+dnl ========================================================
+dnl GL provider
+dnl ========================================================
+MOZ_GL_PROVIDER=
+MOZ_ARG_WITH_STRING(gl-provider,
+[  --with-gl-provider=ID
+                          Set GL provider backend type],
+[ val=`echo $withval`
+    MOZ_GL_PROVIDER="$val"])
+
+if test -n "$MOZ_GL_PROVIDER"; then
+MOZ_GL_DEFAULT_PROVIDER=$MOZ_GL_PROVIDER
+AC_SUBST(MOZ_GL_PROVIDER)
+AC_DEFINE_UNQUOTED(MOZ_GL_PROVIDER, GLContextProvider$MOZ_GL_PROVIDER)
+fi
+
 dnl ========================================================
 dnl = faststripe theme
 dnl ========================================================
@@ -8718,12 +8734,12 @@ if test "$MOZ_X11"; then
 fi # MOZ_X11
 
 dnl Check for headers, etc. needed by WebGL.
-if test -n "$MOZ_WEBGL_GLX"; then
+if test "$MOZ_GL_DEFAULT_PROVIDER" = "GLX"; then
     MOZ_CHECK_HEADER(GL/glx.h)
     if test "$ac_cv_header_GL_glx_h" != "yes"; then
         AC_MSG_ERROR([Can't find header GL/glx.h for WebGL (install mesa-common-dev (Ubuntu), mesa-libGL-devel (Fedora), or Mesa-devel (openSUSE))])
     fi
-fi # MOZ_WEBGL_GLX
+fi # MOZ_GL_DEFAULT_PROVIDER=GLX
 fi # COMPILE_ENVIRONMENT
 
 if test "$USE_FC_FREETYPE"; then

gfx/gl/GLContextProvider.h

@@ -100,6 +100,13 @@ namespace gl {
 #define GL_CONTEXT_PROVIDER_DEFAULT GLContextProviderGLX
 #endif
 
+#ifdef MOZ_GL_PROVIDER
+#define GL_CONTEXT_PROVIDER_NAME MOZ_GL_PROVIDER
+#include "GLContextProviderImpl.h"
+#undef GL_CONTEXT_PROVIDER_NAME
+#define GL_CONTEXT_PROVIDER_DEFAULT MOZ_GL_PROVIDER
+#endif
+
 #ifdef GL_CONTEXT_PROVIDER_DEFAULT
 typedef GL_CONTEXT_PROVIDER_DEFAULT GLContextProvider;
 #else

gfx/gl/Makefile.in

@@ -113,6 +113,10 @@ ifeq ($(MOZ_WIDGET_TOOLKIT),gonk)
 GL_PROVIDER = EGL
 endif
 
+ifdef MOZ_GL_PROVIDER
+GL_PROVIDER = $(MOZ_GL_PROVIDER)
+endif
+
 # Mac is a special snowflake
 ifeq ($(GL_PROVIDER),CGL)
 CMMSRCS += GLContextProvider$(GL_PROVIDER).mm

widget/xpwidgets/nsBaseWidget.cpp

@@ -760,7 +760,7 @@ nsBaseWidget::AutoUseBasicLayerManager::~AutoUseBasicLayerManager()
 bool
 nsBaseWidget::GetShouldAccelerate()
 {
-#if defined(XP_WIN) || defined(ANDROID) || (MOZ_PLATFORM_MAEMO > 5)
+#if defined(XP_WIN) || defined(ANDROID) || (MOZ_PLATFORM_MAEMO > 5) || defined(MOZ_GL_PROVIDER)
   bool accelerateByDefault = true;
 #elif defined(XP_MACOSX)
 /* quickdraw plugins don't work with OpenGL so we need to avoid OpenGL when we want to support