Support browser side thumbnailing for GPU composited pages on Windows.

content/browser/gpu/gpu_surface_tracker.cc

Index: content/browser/gpu/gpu_surface_tracker.cc
diff --git a/content/browser/gpu/gpu_surface_tracker.cc b/content/browser/gpu/gpu_surface_tracker.cc
index 21e293825a4160eff529298abd9a5a1fb7bd411d..2cdd743e90e54ffcb3c20dcf44dc149a5486b297 100644
--- a/content/browser/gpu/gpu_surface_tracker.cc
+++ b/content/browser/gpu/gpu_surface_tracker.cc
@@ -7,11 +7,15 @@
 #include "base/logging.h"
 
 #if defined(OS_WIN)
+#include "content/browser/gpu/gpu_surface_reader_win.h"
 #include "ui/gfx/surface/accelerated_surface_win.h"
 #endif
 
 GpuSurfaceTracker::GpuSurfaceTracker()
     : next_surface_id_(1) {
+#if defined(OS_WIN)
+  reader_.reset(new GpuSurfaceReader);

[apatrick_chromium, 2012/03/07 20:39:37]

And if CopySurface was a free function, this would not be needed.

[mazda, 2012/03/08 13:14:28]

Now I moved the code in CopySurface to RenderWidgetHostViewWin, so reverted the
change in this file.

+#endif
 }
 
 GpuSurfaceTracker::~GpuSurfaceTracker() {
@@ -90,6 +94,22 @@ gfx::GLSurfaceHandle GpuSurfaceTracker::GetSurfaceHandle(int surface_id) {
   return surface_map_[surface_id].handle;
 }
 
+bool GpuSurfaceTracker::CopySurface(int surface_id,
+                                    const gfx::Size& size,
+                                    std::vector<unsigned char>* out) {
+  base::AutoLock lock(lock_);
+#if defined(OS_WIN)

[piman, 2012/03/07 21:22:27]

&& !defined(USE_AURA)

[mazda, 2012/03/08 13:14:28]

Now I moved the code in CopySurface to RenderWidgetHostViewWin, so reverted the
change in this file.

+  SurfaceMap::const_iterator itr = surface_map_.find(surface_id);
+  if (itr == surface_map_.end())
+    return false;
+  return reader_->CopySurface(itr->second, size, out);
+#else
+  // TOOD(mazda): Implement this on other platforms.
+  NOTIMPLEMENTED();
+  return false;
+#endif
+}
+
 #if defined(OS_WIN) && !defined(USE_AURA)
 
 void GpuSurfaceTracker::AsyncPresentAndAcknowledge(
@@ -113,4 +133,3 @@ void GpuSurfaceTracker::AsyncPresentAndAcknowledge(
 }
 
 #endif  // OS_WIN
-