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/gl/io_surface_support_mac.h"
  14 #include "ui/surface/accelerated_surface_mac.h"
  15 #include "ui/surface/transport_dib.h"
  16
  17 namespace content {
  18
  19 WebPluginAcceleratedSurfaceProxy* WebPluginAcceleratedSurfaceProxy::Create(
  20     WebPluginProxy* plugin_proxy,
  21     gfx::GpuPreference gpu_preference) {
  22   // This code path shouldn't be taken if CA plugins are disabled
  23   // because the CA drawing model shouldn't be advertised.
  24   DCHECK(!CommandLine::ForCurrentProcess()->HasSwitch(
  25       switches::kDisableCoreAnimationPlugins));
  26
  27   // Require IOSurface support for drawing Core Animation plugins.
  28   if (!IOSurfaceSupport::Initialize())
  29     return NULL;
  30
  31   AcceleratedSurface* surface = new AcceleratedSurface;
  32   // It's possible for OpenGL to fail to initialize (e.g., if an incompatible
  33   // mode is forced via flags), so handle that gracefully.
  34   if (!surface->Initialize(NULL, true, gpu_preference)) {
  35     delete surface;
  36     return NULL;
  37   }
  38
  39   return new WebPluginAcceleratedSurfaceProxy(plugin_proxy, surface);
  40 }
  41
  42 WebPluginAcceleratedSurfaceProxy::WebPluginAcceleratedSurfaceProxy(
  43     WebPluginProxy* plugin_proxy,
  44     AcceleratedSurface* surface)
  45         : plugin_proxy_(plugin_proxy),
  46           surface_(surface) {
  47 }
  48
  49 WebPluginAcceleratedSurfaceProxy::~WebPluginAcceleratedSurfaceProxy() {
  50   if (surface_) {
  51     surface_->Destroy();
  52     delete surface_;
  53     surface_ = NULL;
  54   }
  55 }
  56
  57 void WebPluginAcceleratedSurfaceProxy::SetSize(const gfx::Size& size) {
  58   if (!surface_)
  59     return;
  60
  61   uint32 io_surface_id = surface_->SetSurfaceSize(size);
  62   // If allocation fails for some reason, still inform the plugin proxy.
  63   plugin_proxy_->AcceleratedPluginAllocatedIOSurface(
  64       size.width(), size.height(), io_surface_id);
  65 }
  66
  67 CGLContextObj WebPluginAcceleratedSurfaceProxy::context() {
  68   return surface_ ? surface_->context() : NULL;
  69 }
  70
  71 void WebPluginAcceleratedSurfaceProxy::StartDrawing() {
  72   if (!surface_)
  73     return;
  74
  75   surface_->MakeCurrent();
  76   surface_->Clear(gfx::Rect(surface_->GetSize()));
  77 }
  78
  79 void WebPluginAcceleratedSurfaceProxy::EndDrawing() {
  80   if (!surface_)
  81     return;
  82
  83   surface_->SwapBuffers();
  84   plugin_proxy_->AcceleratedPluginSwappedIOSurface();
  85 }
  86
  87 }  // namespace content