content/plugin/webplugin_accelerated_surface_proxy_mac.cc

   1 // Copyright (c) 2012 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 #import <OpenGL/OpenGL.h>
   6
   7 #include "content/plugin/webplugin_accelerated_surface_proxy_mac.h"
   8
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "content/plugin/webplugin_proxy.h"
  12 #include "content/public/common/content_switches.h"
  13 #include "ui/surface/accelerated_surface_mac.h"
  14 #include "ui/surface/transport_dib.h"
  15
  16 namespace content {
  17
  18 WebPluginAcceleratedSurfaceProxy* WebPluginAcceleratedSurfaceProxy::Create(
  19     WebPluginProxy* plugin_proxy,
  20     gfx::GpuPreference gpu_preference) {
  21   // This code path shouldn't be taken if CA plugins are disabled
  22   // because the CA drawing model shouldn't be advertised.
  23   DCHECK(!CommandLine::ForCurrentProcess()->HasSwitch(
  24       switches::kDisableCoreAnimationPlugins));
  25
  26   AcceleratedSurface* surface = new AcceleratedSurface;
  27   // It's possible for OpenGL to fail to initialize (e.g., if an incompatible
  28   // mode is forced via flags), so handle that gracefully.
  29   if (!surface->Initialize(NULL, true, gpu_preference)) {
  30     delete surface;
  31     return NULL;
  32   }
  33
  34   return new WebPluginAcceleratedSurfaceProxy(plugin_proxy, surface);
  35 }
  36
  37 WebPluginAcceleratedSurfaceProxy::WebPluginAcceleratedSurfaceProxy(
  38     WebPluginProxy* plugin_proxy,
  39     AcceleratedSurface* surface)
  40         : plugin_proxy_(plugin_proxy),
  41           surface_(surface) {
  42 }
  43
  44 WebPluginAcceleratedSurfaceProxy::~WebPluginAcceleratedSurfaceProxy() {
  45   if (surface_) {
  46     surface_->Destroy();
  47     delete surface_;
  48     surface_ = NULL;
  49   }
  50 }
  51
  52 void WebPluginAcceleratedSurfaceProxy::SetSize(const gfx::Size& size) {
  53   if (!surface_)
  54     return;
  55
  56   uint32 io_surface_id = surface_->SetSurfaceSize(size);
  57   // If allocation fails for some reason, still inform the plugin proxy.
  58   plugin_proxy_->AcceleratedPluginAllocatedIOSurface(
  59       size.width(), size.height(), io_surface_id);
  60 }
  61
  62 CGLContextObj WebPluginAcceleratedSurfaceProxy::context() {
  63   return surface_ ? surface_->context() : NULL;
  64 }
  65
  66 void WebPluginAcceleratedSurfaceProxy::StartDrawing() {
  67   if (!surface_)
  68     return;
  69
  70   surface_->MakeCurrent();
  71   surface_->Clear(gfx::Rect(surface_->GetSize()));
  72 }
  73
  74 void WebPluginAcceleratedSurfaceProxy::EndDrawing() {
  75   if (!surface_)
  76     return;
  77
  78   surface_->SwapBuffers();
  79   plugin_proxy_->AcceleratedPluginSwappedIOSurface();
  80 }
  81
  82 }  // namespace content