content/renderer/browser_plugin/browser_plugin_compositing_helper.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/browser_plugin/browser_plugin_compositing_helper.h"
   6
   7 #include "cc/texture_layer.h"
   8 #include "content/common/browser_plugin_messages.h"
   9 #include "content/renderer/render_thread_impl.h"
  10 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginContainer.h"
  11 #include "webkit/compositor_bindings/web_layer_impl.h"
  12
  13 namespace content {
  14
  15 static void SendACK(const std::string& mailbox_name,
  16                     int host_route_id,
  17                     int gpu_route_id,
  18                     int gpu_host_id,
  19                     unsigned sync_point) {
  20   RenderThread::Get()->Send(
  21       new BrowserPluginHostMsg_BuffersSwappedACK(
  22           host_route_id,
  23           gpu_route_id,
  24           gpu_host_id,
  25           mailbox_name,
  26           sync_point));
  27 }
  28
  29 BrowserPluginCompositingHelper::BrowserPluginCompositingHelper(
  30     WebKit::WebPluginContainer* container,
  31     int host_routing_id)
  32     : host_routing_id_(host_routing_id),
  33       last_mailbox_valid_(false),
  34       container_(container) {
  35 }
  36
  37 BrowserPluginCompositingHelper::~BrowserPluginCompositingHelper() {
  38   container_->setWebLayer(NULL);
  39 }
  40
  41 void BrowserPluginCompositingHelper::EnableCompositing(bool enable) {
  42   if (enable && !texture_layer_) {
  43     texture_layer_ = cc::TextureLayer::createForMailbox();
  44     web_layer_.reset(new WebKit::WebLayerImpl(texture_layer_));
  45   }
  46
  47   container_->setWebLayer(enable ? web_layer_.get() : NULL);
  48 }
  49
  50 void BrowserPluginCompositingHelper::OnBuffersSwapped(const gfx::Size& size,
  51                                                const std::string& mailbox_name,
  52                                                int gpu_route_id,
  53                                                int gpu_host_id) {
  54   if (!last_mailbox_valid_)
  55     SendACK(std::string(), host_routing_id_, gpu_route_id, gpu_host_id, 0);
  56
  57   last_mailbox_valid_ = !mailbox_name.empty();
  58   texture_layer_->setTextureMailbox(mailbox_name,
  59                                     base::Bind(&SendACK,
  60                                                mailbox_name,
  61                                                host_routing_id_,
  62                                                gpu_route_id,
  63                                                gpu_host_id));
  64 }
  65
  66 }  // namespace content