Use SkSrc_Mode in SkCanvasVideoRenderer, to prevent transparent video frames from blending with reu…

media/base/video_util.h

 // Copyright (c) 2012 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 MEDIA_BASE_VIDEO_UTIL_H_
 #define MEDIA_BASE_VIDEO_UTIL_H_
 
 #include "base/basictypes.h"
 #include "media/base/media_export.h"
 #include "ui/gfx/rect.h"
@@ skipping 26 matching lines @@
 
 // |plane| is one of VideoFrame::kYPlane, VideoFrame::kUPlane,
 // VideoFrame::kVPlane or VideoFrame::kAPlane
 MEDIA_EXPORT void CopyPlane(size_t plane, const uint8* source, int stride,
                             int rows, VideoFrame* frame);
 
 
 // Fills |frame| containing YUV data to the given color values.
 MEDIA_EXPORT void FillYUV(VideoFrame* frame, uint8 y, uint8 u, uint8 v);
 
+// Fills |frame| containing YUVA data with the given color values.
+MEDIA_EXPORT void FillYUVA(VideoFrame* frame,
+                           uint8 y,
+                           uint8 u,
+                           uint8 v,
+                           uint8 a);
+
 // Creates a border in |frame| such that all pixels outside of
 // |view_area| are black. The size and position of |view_area|
 // must be even to align correctly with the color planes.
 // Only YV12 format video frames are currently supported.
 MEDIA_EXPORT void LetterboxYUV(VideoFrame* frame,
                                const gfx::Rect& view_area);
 
 // Rotates |src| plane by |rotation| degree with possible flipping vertically
 // and horizontally.
 // |rotation| is limited to {0, 90, 180, 270}.
@@ skipping 23 matching lines @@
 // Copy an RGB bitmap into the specified |region_in_frame| of a YUV video frame.
 // Fills the regions outside |region_in_frame| with black.
 MEDIA_EXPORT void CopyRGBToVideoFrame(const uint8* source,
                                       int stride,
                                       const gfx::Rect& region_in_frame,
                                       VideoFrame* frame);
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_VIDEO_UTIL_H_