[CLOSED] In-browser software compositing

content/browser/renderer_host/image_transport_factory.cc

Index: content/browser/renderer_host/image_transport_factory.cc
diff --git a/content/browser/renderer_host/image_transport_factory.cc b/content/browser/renderer_host/image_transport_factory.cc
index ba45309f8d990cfe0539c320d0291f8b06491df1..6b6ff401c74481efa4643ac972b00ca6e8837b08 100644
--- a/content/browser/renderer_host/image_transport_factory.cc
+++ b/content/browser/renderer_host/image_transport_factory.cc
@@ -13,12 +13,13 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/threading/non_thread_safe.h"
-#include "cc/output_surface.h"
 #include "cc/output_surface_client.h"
+#include "cc/output_surface_impl.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
+#include "content/browser/renderer_host/software_output_device.h"
 #include "content/common/gpu/client/gl_helper.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
@@ -33,6 +34,7 @@
 #include "third_party/khronos/GLES2/gl2ext.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/compositor_setup.h"
+#include "ui/compositor/compositor_switches.h"
 #include "ui/compositor/test_web_graphics_context_3d.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
@@ -613,6 +615,16 @@ WebKit::WebGraphicsContext3D* CreateTestContext() {
   return test_context;
 }
 
+class SoftwareTransportFactory : public DefaultTransportFactory {
+ public:
+  cc::OutputSurface* CreateOutputSurface(ui::Compositor* compositor) {
+    scoped_ptr<SoftwareOutputDevice> software_device(
+        new SoftwareOutputDevice(compositor));
+    return new cc::OutputSurfaceImpl(
+        software_device.PassAs<cc::SoftwareOutputDevice>());
+  }
+};
+
 }  // anonymous namespace
 
 // static
@@ -622,11 +634,13 @@ void ImageTransportFactory::Initialize() {
     ui::SetupTestCompositor();
   }
   if (ui::IsTestCompositorEnabled()) {
-    g_factory = new DefaultTransportFactory();
+    g_factory = new DefaultTransportFactory;
     WebKitPlatformSupportImpl::SetOffscreenContextFactoryForTest(
         CreateTestContext);
+  } else if (command_line->HasSwitch(switches::kUIEnableSoftwareCompositing)) {
+    g_factory = new SoftwareTransportFactory;
   } else {
-    g_factory = new GpuProcessTransportFactory();
+    g_factory = new GpuProcessTransportFactory;
   }
   ui::ContextFactory::SetInstance(g_factory->AsContextFactory());
 }