Partial swaps on OSX

content/browser/renderer_host/accelerated_surface_container_mac.h

 // Copyright (c) 2011 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 CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MAC_H_
 #pragma once
 
 // The "GPU plugin" is currently implemented as a special kind of
 // NPAPI plugin to provide high-performance on-screen 3D rendering for
@@ skipping 65 matching lines @@
 
   // Causes the next Draw call to trigger a texture upload. Should be called any
   // time the drawing context has changed.
   void ForceTextureReload() { texture_needs_upload_ = true; }
 
   // Returns if the surface should be shown.
   bool ShouldBeVisible() const;
 
   // Notifies the the container that its surface was painted to.
   void set_was_painted_to(uint64 surface_id);
+  void set_was_painted_to(uint64 surface_id,
+                          const gfx::Rect& update_rect);
 
   // Notifies the container that its surface is invalid.
   void set_surface_invalid() { was_painted_to_ = false; }
  private:
+  // Enqueue our texture for later deletion.
+  void EnqueueTextureForDeletion();
+
+  void set_was_painted_to_common(uint64 surface_id);
+
   // The manager of this accelerated surface container.
   AcceleratedSurfaceContainerManagerMac* manager_;
 
   // Whether this accelerated surface's content is supposed to be opaque.
   bool opaque_;
 
   // The IOSurfaceRef, if any, that has been handed from the GPU
   // plugin process back to the browser process for drawing.
   // This is held as a CFTypeRef because we can't refer to the
   // IOSurfaceRef type when building on 10.5.
@@ skipping 22 matching lines @@
   // The "live" OpenGL texture referring to this IOSurfaceRef. Note
   // that per the CGLTexImageIOSurface2D API we do not need to
   // explicitly update this texture's contents once created. All we
   // need to do is ensure it is re-bound before attempting to draw
   // with it.
   GLuint texture_;
 
   // True if we need to upload the texture again during the next draw.
   bool texture_needs_upload_;
 
+  // The region that was updated via a partial update. |update_rect_.IsEmpty()|
+  // indicates that the whole region was updated.
+  gfx::Rect update_rect_;
+
   // This may refer to an old version of the texture if the container is
   // resized, for example.
   GLuint texture_pending_deletion_;
 
   // Stores if the plugin has a visible state.
   bool visible_;
 
   // Stores if the plugin's IOSurface has been swapped before. Used to not show
   // it before it hasn't been painted to at least once.
   bool was_painted_to_;
 
-  // Releases the IOSurface reference, if any, retained by this object.
-  void ReleaseIOSurface();
-
-  // Enqueue our texture for later deletion.
-  void EnqueueTextureForDeletion();
-
   DISALLOW_COPY_AND_ASSIGN(AcceleratedSurfaceContainerMac);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MAC_H_