rendering_helper - Replaces multiple windows by a full-screen window.

content/common/gpu/media/rendering_helper.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.

[Ami GONE FROM CHROMIUM, 2014/05/08 21:15:09]

CL description has a bunch of typos; please fix

 // 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 <vector>
 
 #include "base/basictypes.h"
-#include "ui/gfx/size.h"
+#include "base/time/time.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace base {
 class MessageLoop;
 class WaitableEvent;
 }
 
 #if !defined(OS_WIN) && defined(ARCH_CPU_X86_FAMILY)
 #define GL_VARIANT_GLX 1
 typedef GLXContext NativeContextType;
 #else
 #define GL_VARIANT_EGL 1
 typedef EGLContext NativeContextType;
 #endif
 
 namespace content {
 
+enum RenderingState {

[Ami GONE FROM CHROMIUM, 2014/05/08 21:15:09]

only used by the impl; should be in the private: section of RenderingHelper.

[Owen Lin, 2014/05/09 10:25:03]

Done.

+    RENDERING_START, RENDERING_STOPPING, RENDERING_STOPPED
+};
+
 struct RenderingHelperParams {
   RenderingHelperParams();
   ~RenderingHelperParams();
 
   bool suppress_swap_to_display;
   int num_windows;
   // Dimensions of window(s) created for displaying frames. In the
   // case of thumbnail rendering, these won't match the frame dimensions.
   std::vector<gfx::Size> window_dimensions;
   // Dimensions of video frame texture(s).
@@ skipping 42 matching lines @@
   NativeContextType GetGLContext();
 
   // Get rendered thumbnails as RGB.
   // Sets alpha_solid to true if the alpha channel is entirely 0xff.
   void GetThumbnailsAsRGB(std::vector<unsigned char>* rgb,
                           bool* alpha_solid,
                           base::WaitableEvent* done);
 
  private:
   void Clear();
+  void StartRendering();
+  void StopRendering();
+
 
   // Make window_id's surface current w/ the GL context, or release the context
   // if |window_id < 0|.
   void MakeCurrent(int window_id);
 
+  void RenderContent();
+  void DrawTexture(const gfx::Rect &area,
+                   uint32 texture_target,
+                   uint32 texture_id);
+
   base::MessageLoop* message_loop_;
-  std::vector<gfx::Size> window_dimensions_;
   std::vector<gfx::Size> frame_dimensions_;
 
   NativeContextType gl_context_;
   std::map<uint32, int> texture_id_to_surface_index_;
 
 #if defined(GL_VARIANT_EGL)
   EGLDisplay gl_display_;
-  std::vector<EGLSurface> gl_surfaces_;
+  EGLSurface gl_surface_;
 #else
   XVisualInfo* x_visual_;
 #endif
 
 #if defined(OS_WIN)
-  std::vector<HWND> windows_;
+  HWND window_;
 #else
   Display* x_display_;
-  std::vector<Window> x_windows_;
+  Window x_window_;
 #endif
 
+  std::vector<gfx::Rect> render_areas_;
+  std::vector<uint32> texture_ids_;
+  std::vector<uint32> texture_targets_;
+
   bool render_as_thumbnails_;
+  RenderingState rendering_state_;
   int frame_count_;
   GLuint thumbnails_fbo_id_;
   GLuint thumbnails_texture_id_;
   gfx::Size thumbnails_fbo_size_;
   gfx::Size thumbnail_size_;
   GLuint program_;
+  base::TimeDelta frame_duration_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderingHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_RENDERING_HELPER_H_