Bug 1322650 - Allow access to TexturePoolOGL from Java r=jchen

gfx/layers/opengl/TexturePoolOGL.cpp

@@ -10,6 +10,10 @@
 #include "nsDebug.h"                    // for NS_ASSERTION, NS_ERROR, etc
 #include "nsDeque.h"                    // for nsDeque
 
+#ifdef MOZ_WIDGET_ANDROID
+#include "GeneratedJNINatives.h"
+#endif
+
 #define TEXTURE_POOL_SIZE 10
 
 namespace mozilla {
@@ -20,6 +24,19 @@ static GLContext* sActiveContext = nullptr;
 static Monitor* sMonitor = nullptr;
 static nsDeque* sTextures = nullptr;
 
+#ifdef MOZ_WIDGET_ANDROID
+
+class GeckoSurfaceTextureSupport final
+    : public java::GeckoSurfaceTexture::Natives<GeckoSurfaceTextureSupport>
+{
+public:
+  static int32_t NativeAcquireTexture() {
+    return TexturePoolOGL::AcquireTexture();
+  }
+};
+
+#endif // MOZ_WIDGET_ANDROID
+
 GLuint TexturePoolOGL::AcquireTexture()
 {
   NS_ASSERTION(sMonitor, "not initialized");
@@ -111,6 +128,12 @@ void TexturePoolOGL::Init()
 {
   sMonitor = new Monitor("TexturePoolOGL.sMonitor");
   sTextures = new nsDeque();
+
+#ifdef MOZ_WIDGET_ANDROID
+  if (jni::IsAvailable()) {
+    GeckoSurfaceTextureSupport::Init();
+  }
+#endif
 }
 
 void TexturePoolOGL::Shutdown()