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      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
     88