cc: Use the onscreen context to perform composited ganesh filters.

cc/output/gl_renderer.h

 // Copyright 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_OUTPUT_GL_RENDERER_H_
 #define CC_OUTPUT_GL_RENDERER_H_
 
 #include "base/cancelable_callback.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/scoped_ptr_deque.h"
@@ skipping 27 matching lines @@
 class ScopedResource;
 class StreamVideoDrawQuad;
 class TextureDrawQuad;
 class TextureMailboxDeleter;
 class GeometryBinding;
 class ScopedEnsureFramebufferAllocation;
 
 // Class that handles drawing of composited render layers using GL.
 class CC_EXPORT GLRenderer : public DirectRenderer {
  public:
+  class UseGrContext;

[enne (OOO), 2014/04/23 19:53:41]

Does this need to be a nested class? Can you just hide it in the source file?

[danakj, 2014/04/23 19:56:05]

It accesses the protected output_surface_ member and RestoreGLState() methods. I
could add an accessor and make Restore..() public instead?

+
   static scoped_ptr<GLRenderer> Create(
       RendererClient* client,
       const LayerTreeSettings* settings,
       OutputSurface* output_surface,
       ResourceProvider* resource_provider,
       TextureMailboxDeleter* texture_mailbox_deleter,
       int highp_threshold_min);
 
   virtual ~GLRenderer();
 
@@ skipping 151 matching lines @@
       unsigned source_buffer,
       unsigned query,
       uint8_t* dest_pixels,
       const gfx::Size& size);
   void PassOnSkBitmap(scoped_ptr<SkBitmap> bitmap,
                       scoped_ptr<SkAutoLockPixels> lock,
                       scoped_ptr<CopyOutputRequest> request,
                       bool success);
 
   void ReinitializeGLState();
+  void RestoreGLState(DrawingFrame* frame);
 
   virtual void DiscardBackbuffer() OVERRIDE;
   virtual void EnsureBackbuffer() OVERRIDE;
   void EnforceMemoryPolicy();
 
   void ScheduleOverlays(DrawingFrame* frame);
 
   typedef ScopedPtrVector<ResourceProvider::ScopedReadLockGL>
       OverlayResourceLockList;
   OverlayResourceLockList pending_overlay_resources_;
@@ skipping 223 matching lines @@
 #if DEBUG_GL_CALLS && !defined(NDEBUG)
 #define GLC(context, x)                                                        \
   (x, GLRenderer::DebugGLCall(&* context, #x, __FILE__, __LINE__))
 #else
 #define GLC(context, x) (x)
 #endif
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_GL_RENDERER_H_