Bug 959171 - Fix how to bind EGLImage in GrallocTextureHostOGL. r=nical

gfx/layers/opengl/GrallocTextureHost.cpp

@@ -122,6 +122,10 @@ void GrallocTextureSourceOGL::BindTexture(GLenum aTextureUnit)
 
   gl()->fActiveTexture(aTextureUnit);
   gl()->fBindTexture(textureTarget, tex);
+  if (!mEGLImage) {
+    mEGLImage = EGLImageCreateFromNativeBuffer(gl(), mGraphicBuffer->getNativeBuffer());
+  }
+  gl()->fEGLImageTargetTexture2D(textureTarget, mEGLImage);
   gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
 }
 
@@ -173,6 +177,13 @@ GrallocTextureSourceOGL::SetCompositableBackendSpecificData(CompositableBackendS
   }
 
   if (!mNeedsReset) {
+    // Update binding to the EGLImage
+    gl()->MakeCurrent();
+    GLuint tex = GetGLTexture();
+    GLuint textureTarget = GetTextureTarget();
+    gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
+    gl()->fBindTexture(textureTarget, tex);
+    gl()->fEGLImageTargetTexture2D(textureTarget, mEGLImage);
     return;
   }
 

gfx/layers/opengl/TextureHostOGL.cpp

@@ -225,6 +225,7 @@ CompositableDataGonkOGL::DeleteTextureIfPresent()
     if (gl()->MakeCurrent()) {
       gl()->fDeleteTextures(1, &mTexture);
     }
+    mTexture = 0;
   }
 }