WebGL & 16-bit video stream: upload to FLOAT texture.

media/renderers/skcanvas_video_renderer.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_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_
 #define MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 73 matching lines @@
   bool CopyVideoFrameTexturesToGLTexture(
       const Context3D& context_3d,
       gpu::gles2::GLES2Interface* destination_gl,
       const scoped_refptr<VideoFrame>& video_frame,
       unsigned int texture,
       unsigned int internal_format,
       unsigned int type,
       bool premultiply_alpha,
       bool flip_y);
 
+  // Converts unsigned 16-bit value to target |format| for Y16 format and
+  // calls WebGL texImage2D.
+  // |level|, |internal_format|, |format|, |type| are WebGL texImage2D
+  // parameters.
+  // Returns false if there is no implementation for given parameters.
+  static bool TexImage2D(unsigned target,
+                         gpu::gles2::GLES2Interface* gl,
+                         VideoFrame* video_frame,
+                         int level,
+                         int internalformat,
+                         unsigned format,
+                         unsigned type,
+                         bool flip_y,
+                         bool premultiply_alpha);
+
+  // Converts unsigned 16-bit value to target |format| for Y16 format and
+  // calls WebGL texSubImage2D.
+  // |level|, |format|, |type|, |xoffset| and |yoffset| are texSubImage2D
+  // parameters.
+  // Returns false if there is no implementation for given parameters.
+  static bool TexSubImage2D(unsigned target,
+                            gpu::gles2::GLES2Interface* gl,
+                            VideoFrame* video_frame,
+                            int level,
+                            unsigned format,
+                            unsigned type,
+                            int xoffset,
+                            int yoffset,
+                            bool flip_y,
+                            bool premultiply_alpha);
+
   // In general, We hold the most recently painted frame to increase the
   // performance for the case that the same frame needs to be painted
   // repeatedly. Call this function if you are sure the most recent frame will
   // never be painted again, so we can release the resource.
   void ResetCache();
 
   void CorrectLastImageDimensions(const SkIRect& visible_rect);
 
   // Used for unit test.
   SkISize LastImageDimensionsForTesting();
@@ skipping 16 matching lines @@
 
   // Used for unit test.
   SkISize last_image_dimensions_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_