gpu: media: RenderingHelper: wait for the display & window to be ready

content/common/gpu/media/rendering_helper.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 CONTENT_COMMON_GPU_MEDIA_RENDERING_HELPER_H_
 #define CONTENT_COMMON_GPU_MEDIA_RENDERING_HELPER_H_
 
 #include <map>
 #include <queue>
 #include <vector>
@@ skipping 66 matching lines @@
 
 // Creates and draws textures used by the video decoder.
 // This class is not thread safe and thus all the methods of this class
 // (except for ctor/dtor) ensure they're being run on a single thread.
 class RenderingHelper {
  public:
 
   RenderingHelper();
   ~RenderingHelper();
 
-  static bool InitializeOneOff();
+  // Initialize GL. This method must be called on the rendering
+  // thread.
+  static void InitializeOneOff(base::WaitableEvent* done);
 
-  // Create the render context and windows by the specified dimensions.
+  // Setup the platform window to display test results. This method
+  // must be called on the main thread.
+  void Setup();
+
+  // Tear down the platform window. This method must be called on the
+  // main thread.
+  void TearDown();
+
+  // Create the render context and windows by the specified
+  // dimensions. This method must be called on the rendering thread.
   void Initialize(const RenderingHelperParams& params,
                   base::WaitableEvent* done);
 
-  // Undo the effects of Initialize() and signal |*done|.
+  // Undo the effects of Initialize() and signal |*done|. This method
+  // must be called on the rendering thread.
   void UnInitialize(base::WaitableEvent* done);
 
   // Return a newly-created GLES2 texture id of the specified size, and
   // signal |*done|.
   void CreateTexture(uint32 texture_target,
                      uint32* texture_id,
                      const gfx::Size& size,
                      base::WaitableEvent* done);
 
   // Render thumbnail in the |texture_id| to the FBO buffer using target
@@ skipping 99 matching lines @@
   base::CancelableClosure render_task_;
   base::TimeTicks vsync_timebase_;
   base::TimeDelta vsync_interval_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderingHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_RENDERING_HELPER_H_