Android Webview IPC-based sync compositing

content/renderer/render_widget.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 66 matching lines @@
 #include "ui/gfx/geometry/point_conversions.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/surface/transport_dib.h"
 
 #if defined(OS_ANDROID)
 #include <android/keycodes.h>
 #include "content/renderer/android/synchronous_compositor_factory.h"
+#include "content/renderer/android/synchronous_compositor_filter.h"
+#include "content/renderer/android/synchronous_compositor_output_surface.h"
 #endif
 
 #if defined(OS_POSIX)
 #include "ipc/ipc_channel_posix.h"
 #include "third_party/skia/include/core/SkMallocPixelRef.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #endif  // defined(OS_POSIX)
 
 #include "third_party/WebKit/public/web/WebWidget.h"
 
@@ skipping 928 matching lines @@
       // Cause the compositor to wait and try again.
       return nullptr;
     }
 
 #if defined(OS_ANDROID)
     if (SynchronousCompositorFactory* factory =
             SynchronousCompositorFactory::GetInstance()) {
       return factory->CreateOutputSurface(
           routing_id(), frame_swap_message_queue_, context_provider,
           worker_context_provider);
+    } else if (RenderThreadImpl::current()->sync_compositor_message_filter()) {
+      return make_scoped_ptr(new SynchronousCompositorOutputSurface(
+          context_provider, worker_context_provider, routing_id(),
+          content::RenderThreadImpl::current()
+              ->sync_compositor_message_filter(),
+          frame_swap_message_queue_));
     }
 #endif
   }
 
   uint32 output_surface_id = next_output_surface_id_++;
   // Composite-to-mailbox is currently used for layout tests in order to cause
   // them to draw inside in the renderer to do the readback there. This should
   // no longer be the case when crbug.com/311404 is fixed.
   if (!RenderThreadImpl::current() ||
       !RenderThreadImpl::current()->layout_test_mode()) {
@@ skipping 1321 matching lines @@
   blink::WebGraphicsContext3D::Attributes attributes;
   attributes.antialias = false;
   attributes.shareResources = true;
   attributes.noAutomaticFlushes = true;
   attributes.depth = false;
   attributes.stencil = false;
   bool lose_context_when_out_of_memory = true;
   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits limits;
 #if defined(OS_ANDROID)
   bool using_synchronous_compositing =
-      SynchronousCompositorFactory::GetInstance();
+      SynchronousCompositorFactory::GetInstance() ||
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kIPCSyncCompositing);
   // If we raster too fast we become upload bound, and pending
   // uploads consume memory. For maximum upload throughput, we would
   // want to allow for upload_throughput * pipeline_time of pending
   // uploads, after which we are just wasting memory. Since we don't
   // know our upload throughput yet, this just caps our memory usage.
   // Synchronous compositor uses half because synchronous compositor
   // pipeline is only one frame deep. But twice of half for low end
   // because 16bit texture is not supported.
   size_t divider = using_synchronous_compositing ? 2 : 1;
   if (base::SysInfo::IsLowEndDevice())
@@ skipping 44 matching lines @@
 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.RemoveObserver(frame);
 }
 #endif  // defined(VIDEO_HOLE)
 
 }  // namespace content