webgl: optimize webgl.texSubImage2D(video) path.

content/renderer/media/webmediaplayer_ms.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 "content/renderer/media/webmediaplayer_ms.h"
 
 #include <limits>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 404 matching lines @@
 }
 
 bool WebMediaPlayerMS::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", "WebMediaPlayerMS: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 WebMediaPlayerMS::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", "WebMediaPlayerMS:copyVideoTextureToPlatformTexture");
   DCHECK(thread_checker_.CalledOnValidThread());
 
   scoped_refptr<media::VideoFrame> video_frame;
   {
     base::AutoLock auto_lock(current_frame_lock_);
     video_frame = current_frame_;
   }
 
   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* const gl =
       static_cast<gpu_blink::WebGraphicsContext3DImpl*>(web_graphics_context)
           ->GetGLInterface();
   media::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 WebMediaPlayerMS::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",
+               "WebMediaPlayerMS:copyVideoSubTextureToPlatformTexture");
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  scoped_refptr<media::VideoFrame> video_frame;
+  {
+    base::AutoLock auto_lock(current_frame_lock_);
+    video_frame = current_frame_;
+  }
+
+  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();
+  media::SkCanvasVideoRenderer::CopySubVideoFrameSingleTextureToGLTexture(
+      gl, video_frame.get(), target, texture, level, xoffset, yoffset,
+      premultiply_alpha, flip_y);
+  return true;
+}
+
 void WebMediaPlayerMS::SetVideoFrameProviderClient(
     cc::VideoFrameProvider::Client* client) {
   // This is called from both the main renderer thread and the compositor
   // thread (when the main thread is blocked).
   if (video_frame_provider_client_)
     video_frame_provider_client_->StopUsingProvider();
   video_frame_provider_client_ = client;
 }
 
 bool WebMediaPlayerMS::UpdateCurrentFrame(base::TimeTicks deadline_min,
@@ skipping 97 matching lines @@
   GetClient()->readyStateChanged();
 }
 
 blink::WebMediaPlayerClient* WebMediaPlayerMS::GetClient() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(client_);
   return client_;
 }
 
 }  // namespace content