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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/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
     83