External stream texture support.

This adds a GL_CHROMIUM_stream_texture extension with an abstract interface
that can be used to allow a consumer to render from a stream of textures being produced externally.

It adds the following functionality:

* GLuint glCreateStreamTextureCHROMIUM(GLuint texture)
This API takes a texture id and creates a StreamTexture object associated with the texture in the GPU process that can be implemented in a platform-specific way.
The returned handle is supposed to identify the stream endpoint. Connecting this to a producer is outside the scope of this change.

* GLvoid glDestroyStreamTextureCHROMIUM(GLuint texture)
Deletes the StreamTexture object associated with the texture and marks the texture as not special anymore.

* BindTexture() will invoke method StreamTexture::Update() if the target is GL_TEXTURE_EXTERNAL_OES and the texture is marked as 'stream texture'.

TEST=added unit tests

Review URL: http://codereview.chromium.org/7754033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@103191 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 3 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.h b/gpu/command_buffer/service/gles2_cmd_decoder.h
index 00fff76..118c27d 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.h
@@ -22,6 +22,7 @@ class GLSurface;
 
 namespace gpu {
 
+class StreamTextureManager;
 class SurfaceManager;
 
 namespace gles2 {
@@ -111,6 +112,8 @@ class GLES2Decoder : public CommonDecoder {
   virtual void SetSwapBuffersCallback(Callback0::Type* callback) = 0;
 #endif
 
+  virtual void SetStreamTextureManager(StreamTextureManager* manager) = 0;
+
   // Get the service texture ID corresponding to a client texture ID.
   // If no such record is found then return false.
   virtual bool GetServiceTextureId(uint32 client_texture_id,