webgl: optimize webgl.texSubImage2D(video) path.

media/blink/webmediaplayer_impl.cc

 // Copyright 2013 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.
 
 #include "media/blink/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 
@@ skipping 615 matching lines @@
 }
 
 bool WebMediaPlayerImpl::copyVideoTextureToPlatformTexture(
     blink::WebGraphicsContext3D* web_graphics_context,
     unsigned int texture,
     unsigned int internal_format,
     unsigned int type,
     bool premultiply_alpha,
     bool flip_y) {
   TRACE_EVENT0("media", "WebMediaPlayerImpl:copyVideoTextureToPlatformTexture");
+  // TODO(dshwang): not include gl2.h because this method will be removed soon.
+  const unsigned int GL_TEXTURE_2D = 0x0DE1;
+  return copyVideoTextureToPlatformTexture(web_graphics_context, GL_TEXTURE_2D,
+                                           texture, internal_format, type, 0,
+                                           premultiply_alpha, flip_y);
+}
+
+bool WebMediaPlayerImpl::copyVideoTextureToPlatformTexture(
+    blink::WebGraphicsContext3D* web_graphics_context,
+    unsigned int target,
+    unsigned int texture,
+    unsigned int internal_format,
+    unsigned int type,
+    int level,
+    bool premultiply_alpha,
+    bool flip_y) {
+  TRACE_EVENT0("media", "WebMediaPlayerImpl:copyVideoTextureToPlatformTexture");
 
   scoped_refptr<VideoFrame> video_frame = GetCurrentFrameFromCompositor();
 
   if (!video_frame.get() || !video_frame->HasTextures() ||
       media::VideoFrame::NumPlanes(video_frame->format()) != 1) {
     return false;
   }
 
   // TODO(dshwang): need more elegant way to convert WebGraphicsContext3D to
   // GLES2Interface.
   gpu::gles2::GLES2Interface* gl =
       static_cast<gpu_blink::WebGraphicsContext3DImpl*>(web_graphics_context)
           ->GetGLInterface();
   SkCanvasVideoRenderer::CopyVideoFrameSingleTextureToGLTexture(
-      gl, video_frame.get(), texture, internal_format, type, premultiply_alpha,
-      flip_y);
+      gl, video_frame.get(), target, texture, internal_format, type, level,
+      premultiply_alpha, flip_y);
   return true;
 }
 
+bool WebMediaPlayerImpl::copyVideoSubTextureToPlatformTexture(
+    blink::WebGraphicsContext3D* web_graphics_context,
+    unsigned int target,
+    unsigned int texture,
+    int level,
+    int xoffset,
+    int yoffset,
+    bool premultiply_alpha,
+    bool flip_y) {
+  TRACE_EVENT0("media",
+               "WebMediaPlayerImpl:copyVideoSubTextureToPlatformTexture");
+
+  scoped_refptr<VideoFrame> video_frame = GetCurrentFrameFromCompositor();
+
+  if (!video_frame.get() || !video_frame->HasTextures() ||
+      media::VideoFrame::NumPlanes(video_frame->format()) != 1) {
+    return false;
+  }
+
+  // TODO(dshwang): need more elegant way to convert WebGraphicsContext3D to
+  // GLES2Interface.
+  gpu::gles2::GLES2Interface* gl =
+      static_cast<gpu_blink::WebGraphicsContext3DImpl*>(web_graphics_context)
+          ->GetGLInterface();
+  SkCanvasVideoRenderer::CopySubVideoFrameSingleTextureToGLTexture(
+      gl, video_frame.get(), target, texture, level, xoffset, yoffset,
+      premultiply_alpha, flip_y);
+  return true;
+}
+
 WebMediaPlayer::MediaKeyException
 WebMediaPlayerImpl::generateKeyRequest(const WebString& key_system,
                                        const unsigned char* init_data,
                                        unsigned init_data_length) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   return encrypted_media_support_.GenerateKeyRequest(
       frame_, key_system, init_data, init_data_length);
 }
 
@@ skipping 394 matching lines @@
 
   // pause() may be called after playback has ended and the HTMLMediaElement
   // requires that currentTime() == duration() after ending.  We want to ensure
   // |paused_time_| matches currentTime() in this case or a future seek() may
   // incorrectly discard what it thinks is a seek to the existing time.
   paused_time_ =
       ended_ ? pipeline_.GetMediaDuration() : pipeline_.GetMediaTime();
 }
 
 }  // namespace media