Bug 1460255 - Implement GLContextProviderWayland, r=lsalzman

GLContextProviderWayland provides both GLX and EGL GL backends on Wayland enabled builds
according to an active Gtk+ backend (X11/Wayland).

MozReview-Commit-ID: TTBDwWMBAP

--HG--
extra : rebase_source : 26e0455ae3775bdcea83deffbb8ad43aacdb3e42

gfx/gl/GLContextProviderWayland.cpp

@@ -0,0 +1,99 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef MOZ_WIDGET_GTK
+#include <gdk/gdk.h>
+#include <gdk/gdkx.h>
+#endif
+
+#include "GLContextProvider.h"
+
+namespace mozilla {
+namespace gl {
+
+using namespace mozilla::gfx;
+using namespace mozilla::widget;
+
+static class GLContextProviderGLX sGLContextProviderGLX;
+static class GLContextProviderEGL sGLContextProviderEGL;
+
+already_AddRefed<GLContext>
+GLContextProviderWayland::CreateWrappingExisting(void* aContext, void* aSurface)
+{
+    if (GDK_IS_X11_DISPLAY(gdk_display_get_default())) {
+        return sGLContextProviderGLX.CreateWrappingExisting(aContext, aSurface);
+    } else {
+        return sGLContextProviderEGL.CreateWrappingExisting(aContext, aSurface);
+    }
+}
+
+already_AddRefed<GLContext>
+GLContextProviderWayland::CreateForCompositorWidget(CompositorWidget* aCompositorWidget, bool aForceAccelerated)
+{
+    if (GDK_IS_X11_DISPLAY(gdk_display_get_default())) {
+        return sGLContextProviderGLX.CreateForCompositorWidget(aCompositorWidget, aForceAccelerated);
+    } else {
+        return sGLContextProviderEGL.CreateForCompositorWidget(aCompositorWidget, aForceAccelerated);
+    }
+}
+
+already_AddRefed<GLContext>
+GLContextProviderWayland::CreateForWindow(nsIWidget* aWidget,
+                                      bool aWebRender,
+                                      bool aForceAccelerated)
+{
+    if (GDK_IS_X11_DISPLAY(gdk_display_get_default())) {
+        return sGLContextProviderGLX.CreateForWindow(aWidget, aWebRender, aForceAccelerated);
+    } else {
+        return sGLContextProviderEGL.CreateForWindow(aWidget, aWebRender, aForceAccelerated);
+    }
+}
+
+/*static*/ already_AddRefed<GLContext>
+GLContextProviderWayland::CreateHeadless(CreateContextFlags flags,
+                                     nsACString* const out_failureId)
+{
+    if (GDK_IS_X11_DISPLAY(gdk_display_get_default())) {
+        return sGLContextProviderGLX.CreateHeadless(flags, out_failureId);
+    } else {
+        return sGLContextProviderEGL.CreateHeadless(flags, out_failureId);
+    }
+}
+
+/*static*/ already_AddRefed<GLContext>
+GLContextProviderWayland::CreateOffscreen(const IntSize& size,
+                                      const SurfaceCaps& minCaps,
+                                      CreateContextFlags flags,
+                                      nsACString* const out_failureId)
+{
+    if (GDK_IS_X11_DISPLAY(gdk_display_get_default())) {
+        return sGLContextProviderGLX.CreateOffscreen(size, minCaps, flags, out_failureId);
+    } else {
+        return sGLContextProviderEGL.CreateOffscreen(size, minCaps, flags, out_failureId);
+    }
+}
+
+/*static*/ GLContext*
+GLContextProviderWayland::GetGlobalContext()
+{
+    if (GDK_IS_X11_DISPLAY(gdk_display_get_default())) {
+        return sGLContextProviderGLX.GetGlobalContext();
+    } else {
+        return sGLContextProviderEGL.GetGlobalContext();
+    }
+}
+
+/*static*/ void
+GLContextProviderWayland::Shutdown()
+{
+    if (GDK_IS_X11_DISPLAY(gdk_display_get_default())) {
+        sGLContextProviderGLX.Shutdown();
+    } else {
+        sGLContextProviderEGL.Shutdown();
+    }
+}
+
+} /* namespace gl */
+} /* namespace mozilla */

gfx/gl/moz.build

@@ -13,7 +13,7 @@ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
 elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'uikit':
     gl_provider = 'EAGL'
 elif 'gtk' in CONFIG['MOZ_WIDGET_TOOLKIT']:
-    if CONFIG['MOZ_EGL_XRENDER_COMPOSITE'] or CONFIG['MOZ_WAYLAND']:
+    if CONFIG['MOZ_EGL_XRENDER_COMPOSITE']:
         gl_provider = 'EGL'
     else:
         gl_provider = 'GLX'
@@ -119,6 +119,11 @@ elif gl_provider == 'GLX':
         'SharedSurfaceGLX.h'
     ]
 
+if CONFIG['MOZ_WAYLAND']:
+    SOURCES += [
+        'GLContextProviderWayland.cpp',
+    ]
+
 UNIFIED_SOURCES += [
     'AndroidSurfaceTexture.cpp',
     'DecomposeIntoNoRepeatTriangles.cpp',