Add the ability for the GPU process to be used to paint the backing store of a

tab. This is the first pass and is currently a bit buggy and incomplete.

This patch refactors the backing store to make it a virtual interface which is
then implemented by the platform-specific backing stores. This cleans up the
multi-platform aspects of the old code, and also makes it possible to create
different backing stores (such as ones in another process).

This renames the BackingStore::PaintRect function to PaintToBackingStore which
clears up what it does. I would often get confused and think that it paints
the backing store to the screen.

This makes a common way to capture backing store information and adds it to the
backing store API. This removed a bunch of ugly ifdefs.

This adds the ability for a backing store to specify that the TransportDIB
should not be freed by RenderWidgetHost when painting is complete. This is
necessary since the out-of-process version needs to use it after the
RenderWidget paint function has returned.

This pushes up the vector of copy_rect from RenderWidgetHost to the actual
BackingStores. This prevents us from sending duplicate data over IPC. It also
makes the common non-IPC case more efficient, since we end up setting up various
surfaces only once when there are multiple update rects.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/523028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@36075 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 3 insertions, 0 deletions

diff --git a/chrome/app/chrome_dll_main.cc b/chrome/app/chrome_dll_main.cc
index 8ef4314..b15e044 100644
--- a/chrome/app/chrome_dll_main.cc
+++ b/chrome/app/chrome_dll_main.cc
@@ -86,6 +86,7 @@
 
 extern int BrowserMain(const MainFunctionParams&);
 extern int RendererMain(const MainFunctionParams&);
+extern int GpuMain(const MainFunctionParams&);
 extern int PluginMain(const MainFunctionParams&);
 extern int WorkerMain(const MainFunctionParams&);
 extern int NaClMain(const MainFunctionParams&);
@@ -671,6 +672,8 @@ int ChromeMain(int argc, char** argv) {
     rv = PluginMain(main_params);
   } else if (process_type == switches::kUtilityProcess) {
     rv = UtilityMain(main_params);
+  } else if (process_type == switches::kGpuProcess) {
+    rv = GpuMain(main_params);
   } else if (process_type == switches::kProfileImportProcess) {
 #if defined(OS_MACOSX)
     rv = ProfileImportMain(main_params);