Make fullscreen pepper flash create a texture layer with software compositor

content/renderer/pepper/pepper_graphics_2d_host.cc

Index: content/renderer/pepper/pepper_graphics_2d_host.cc
diff --git a/content/renderer/pepper/pepper_graphics_2d_host.cc b/content/renderer/pepper/pepper_graphics_2d_host.cc
index f1d719748d3cf578a0009ada12d35f16f0dacf6b..15a57a9c82b71a610a7b5c635869d01aaec8f894 100644
--- a/content/renderer/pepper/pepper_graphics_2d_host.cc
+++ b/content/renderer/pepper/pepper_graphics_2d_host.cc
@@ -8,6 +8,8 @@
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
+#include "cc/resources/texture_mailbox.h"
+#include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/renderer_ppapi_host.h"
 #include "content/renderer/pepper/common.h"
 #include "content/renderer/pepper/gfx_conversion.h"
@@ -187,8 +189,8 @@ PepperGraphics2DHost::PepperGraphics2DHost(RendererPpapiHost* host,
       is_always_opaque_(false),
       scale_(1.0f),
       weak_ptr_factory_(this),
-      is_running_in_process_(host->IsRunningInProcess()) {
-}
+      is_running_in_process_(host->IsRunningInProcess()),
+      texture_mailbox_modified_(true) {}
 
 PepperGraphics2DHost::~PepperGraphics2DHost() {
   // Unbind from the instance when destroyed if we're still bound.
@@ -312,6 +314,8 @@ bool PepperGraphics2DHost::BindToInstance(
     new_instance->InvalidateRect(gfx::Rect());
   }
 
+  texture_mailbox_modified_ = true;
+
   bound_instance_ = new_instance;
   return true;
 }
@@ -551,6 +555,32 @@ int32_t PepperGraphics2DHost::OnHostMsgReadImageData(
   return ReadImageData(image, &top_left) ? PP_OK : PP_ERROR_FAILED;
 }
 
+void ReleaseCallback(scoped_ptr<base::SharedMemory> memory,
+                     unsigned sync_point,
+                     bool lost_resource) {}
+
+bool PepperGraphics2DHost::PrepareTextureMailbox(cc::TextureMailbox* mailbox) {
+  if (!texture_mailbox_modified_)
+    return false;

[piman, 2013/09/05 00:19:43]

one detail, as we switch to fullscreen and back, the layer will be recreated,
after which we need to return true once, to give the mailbox again.

+  // TODO(jbauman): Send image_data_ through mailbox to avoid copy.
+  gfx::Size pixel_image_size(image_data_->width(), image_data_->height());
+  int buffer_size = pixel_image_size.GetArea() * 4;
+  scoped_ptr<base::SharedMemory> memory =
+      RenderThread::Get()->HostAllocateSharedMemoryBuffer(buffer_size);
+  if (!memory || !memory->Map(buffer_size))
+    return false;
+  void* src = image_data_->Map();
+  memcpy(memory->memory(), src, buffer_size);

[piman, 2013/09/05 00:19:43]

image_data_->Unmap();

+
+  base::SharedMemory* mem = memory.get();
+  *mailbox =
+      cc::TextureMailbox(mem,
+                         pixel_image_size,
+                         base::Bind(&ReleaseCallback, base::Passed(&memory)));
+  texture_mailbox_modified_ = false;
+  return true;
+}
+
 int32_t PepperGraphics2DHost::Flush(PP_Resource* old_image_data) {
   bool done_replace_contents = false;
   bool no_update_visible = true;
@@ -616,6 +646,7 @@ int32_t PepperGraphics2DHost::Flush(PP_Resource* old_image_data) {
       } else {
         bound_instance_->InvalidateRect(op_rect);
       }
+      texture_mailbox_modified_ = true;
     }
   }
   queued_operations_.clear();