Enable 2D Canvas painting for Chrome on Android.

webkit/media/android/webmediaplayer_android.cc

Index: webkit/media/android/webmediaplayer_android.cc
diff --git a/webkit/media/android/webmediaplayer_android.cc b/webkit/media/android/webmediaplayer_android.cc
index 5b00e5dbd3c31626a8eb0ff1563c1f33463dccee..92c0ceb4758495c64769617af53f606f449395b5 100644
--- a/webkit/media/android/webmediaplayer_android.cc
+++ b/webkit/media/android/webmediaplayer_android.cc
@@ -8,6 +8,7 @@
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "cc/layers/video_layer.h"
+#include "gpu/GLES2/gl2extchromium.h"
 #include "media/base/android/media_player_bridge.h"
 #include "media/base/video_frame.h"
 #include "net/base/mime_util.h"
@@ -246,6 +247,34 @@ void WebMediaPlayerAndroid::paint(WebKit::WebCanvas* canvas,
   NOTIMPLEMENTED();
 }
 
+bool WebMediaPlayerAndroid::copyVideoTextureToPlatformTexture(
+    WebKit::WebGraphicsContext3D* web_graphics_context,
+    unsigned int texture,
+    unsigned int level,
+    unsigned int internal_format,
+    bool premultiply_alpha,
+    bool flip_y) {
+  // TODO(hkuang): Check if there is valid frame uploaded to the texture?
+  uint32 source_texture = texture_id_;

[qinmin, 2013/04/07 21:52:29]

if texture_id_ is 0, return false?

[hkuang, 2013/04/09 21:55:45]

Done.

+
+  // The video is stored in a unmultiplied format, so premultiply if
+  // necessary.
+  web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
+      premultiply_alpha);
+
+  // Application itself needs to take care of setting the right flip_y
+  // value down to get the expected result.
+  // flip_y==true means to reverse the video orientation while
+  // flip_y==false means to keep the intrinsic orientation.
+  web_graphics_context->pixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, flip_y);
+  web_graphics_context->copyTextureCHROMIUM(GL_TEXTURE_2D, source_texture,
+                                            texture, level, internal_format);
+  web_graphics_context->pixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, false);
+  web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
+                                    false);
+  return true;
+}
+
 bool WebMediaPlayerAndroid::hasSingleSecurityOrigin() const {
   return false;
 }