media: Optimize HW Video to 2D Canvas copy.

media/filters/skcanvas_video_renderer.h

Index: media/filters/skcanvas_video_renderer.h
diff --git a/media/filters/skcanvas_video_renderer.h b/media/filters/skcanvas_video_renderer.h
index 1e81d316f56555034fffdbfef72325d252a6944b..223d9596ed846bfe7a85e2a3f6c389457925a481 100644
--- a/media/filters/skcanvas_video_renderer.h
+++ b/media/filters/skcanvas_video_renderer.h
@@ -10,6 +10,7 @@
 #include "base/timer/timer.h"
 #include "media/base/media_export.h"
 #include "media/base/video_rotation.h"
+#include "third_party/WebKit/public/platform/WebGraphicsContext3DProvider.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/gfx/rect.h"
@@ -30,6 +31,8 @@ class MEDIA_EXPORT SkCanvasVideoRenderer {
 
   // Paints |video_frame| on |canvas|, scaling and rotating the result to fit
   // dimensions specified by |dest_rect|.
+  // If the format of |video_frame| is VideoFrame::NATIVE_TEXTURE and |canvas|
+  // is ganeshed, |context_provider| must be provided.
   //
   // Black will be painted on |canvas| if |video_frame| is null.
   void Paint(const scoped_refptr<VideoFrame>& video_frame,
@@ -37,11 +40,25 @@ class MEDIA_EXPORT SkCanvasVideoRenderer {
              const gfx::RectF& dest_rect,
              uint8 alpha,
              SkXfermode::Mode mode,
-             VideoRotation video_rotation);
+             VideoRotation video_rotation,
+             scoped_ptr<blink::WebGraphicsContext3DProvider> context_provider);
 
   // Copy |video_frame| on |canvas|.
   void Copy(const scoped_refptr<VideoFrame>&, SkCanvas* canvas);
 
+  // Copy the contents of texture of |video_frame| to texture |texture|.
+  // |level|, |internal_format|, |type| specify target texture |texture|.
+  // The format of |video_frame| must be VideoFrame::NATIVE_TEXTURE.
+  static void CopyVideoFrameTextureToGLTexture(
+      blink::WebGraphicsContext3D* context3d,
+      VideoFrame* video_frame,
+      unsigned int texture,
+      unsigned int level,
+      unsigned int internal_format,
+      unsigned int type,
+      bool premultiply_alpha,
+      bool flip_y);
+
  private:
   void ResetLastFrame();
   void ResetAcceleratedLastFrame();