[Chromoting] Fallback to use software renderer if desktop image size is larger than GPU limitaiton

remoting/client/plugin/pepper_video_renderer_3d.h

Index: remoting/client/plugin/pepper_video_renderer_3d.h
diff --git a/remoting/client/plugin/pepper_video_renderer_3d.h b/remoting/client/plugin/pepper_video_renderer_3d.h
index e1699ecfff9a4acb76ebf87374b5635642be2920..cf7706b3843924f361ee76d5915e5a979dfd4b6c 100644
--- a/remoting/client/plugin/pepper_video_renderer_3d.h
+++ b/remoting/client/plugin/pepper_video_renderer_3d.h
@@ -18,6 +18,7 @@
 #include "ppapi/cpp/video_decoder.h"
 #include "ppapi/utility/completion_callback_factory.h"
 #include "remoting/client/plugin/pepper_video_renderer.h"
+#include "remoting/client/plugin/pepper_video_renderer_2d.h"
 #include "remoting/protocol/video_stub.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
 
@@ -61,6 +62,12 @@ class PepperVideoRenderer3D : public PepperVideoRenderer,
 
   class Picture;
 
+  // A structure which contains OpenGl hardware limitations.
+  struct GlLimits {

[Sergey Ulanov, 2016/10/17 20:02:44]

I don't think you really need this struct given that it's used in only one
place.

[Hzj_jie, 2016/10/17 22:55:43]

Done.

+    int texture_size;
+    int viewport_size[2];
+  };
+
   // Callback for pp::VideoDecoder::Initialize().
   void OnInitialized(int32_t result);
 
@@ -136,6 +143,11 @@ class PepperVideoRenderer3D : public PepperVideoRenderer,
   // the |current_picture_| is rendered.
   std::list<std::unique_ptr<FrameTracker>> current_picture_frames_;
 
+  // The fallback software renderer, if input video packet size is larger than
+  // hardware limitation.
+  PepperVideoRenderer2D fallback_renderer_;
+  bool use_fallback_renderer_ = false;
+
   // Set to true if the screen has been resized and needs to be repainted.
   bool force_repaint_ = false;
 
@@ -158,6 +170,9 @@ class PepperVideoRenderer3D : public PepperVideoRenderer,
 
   pp::CompletionCallbackFactory<PepperVideoRenderer3D> callback_factory_;
 
+  // The hardware limitation.
+  GlLimits gl_limits_;
+
   DISALLOW_COPY_AND_ASSIGN(PepperVideoRenderer3D);
 };