Initial port of accelerated compositor to Mac OS X 10.6. Reused...

chrome/browser/renderer_host/accelerated_surface_container_manager_mac.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/accelerated_surface_container_manager_mac.h"
 
 #include "base/logging.h"
 #include "chrome/browser/renderer_host/accelerated_surface_container_mac.h"
 #include "webkit/glue/plugins/webplugin.h"
 
 AcceleratedSurfaceContainerManagerMac::AcceleratedSurfaceContainerManagerMac()
-    : current_id_(0) {
+    : current_id_(0),
+      root_container_(NULL) {
 }
 
 gfx::PluginWindowHandle
 AcceleratedSurfaceContainerManagerMac::AllocateFakePluginWindowHandle(
-    bool opaque) {
+    bool opaque, bool root) {
   AcceleratedSurfaceContainerMac* container =
       new AcceleratedSurfaceContainerMac(this, opaque);
   gfx::PluginWindowHandle res =
       static_cast<gfx::PluginWindowHandle>(++current_id_);
   plugin_window_to_container_map_.insert(std::make_pair(res, container));
+  if (root) {
+    root_container_ = container;
+  }
   return res;
 }
 
 void AcceleratedSurfaceContainerManagerMac::DestroyFakePluginWindowHandle(
     gfx::PluginWindowHandle id) {
   AcceleratedSurfaceContainerMac* container = MapIDToContainer(id);
-  if (container)
+  if (container) {
+    if (container == root_container_)
+      root_container_ = NULL;
     delete container;
+  }
   plugin_window_to_container_map_.erase(id);
 }
 
+bool AcceleratedSurfaceContainerManagerMac::HasRootContainer() {
+  return root_container_ != NULL;
+}
+
 void AcceleratedSurfaceContainerManagerMac::SetSizeAndIOSurface(
     gfx::PluginWindowHandle id,
     int32 width,
     int32 height,
     uint64 io_surface_identifier) {
   AcceleratedSurfaceContainerMac* container = MapIDToContainer(id);
-  if (container)
+  if (container) {
     container->SetSizeAndIOSurface(width, height, io_surface_identifier);
+    if (container == root_container_) {
+      // Fake up a WebPluginGeometry for the root window to set the
+      // container's size; we will never get a notification from the
+      // browser about the root window, only plugins.
+      webkit_glue::WebPluginGeometry geom;
+      gfx::Rect rect(0, 0, width, height);
+      geom.window_rect = rect;
+      geom.clip_rect = rect;
+      geom.visible = true;
+      container->MoveTo(geom);
+    }
+  }
 }
 
 void AcceleratedSurfaceContainerManagerMac::SetSizeAndTransportDIB(
     gfx::PluginWindowHandle id,
     int32 width,
     int32 height,
     TransportDIB::Handle transport_dib) {
   AcceleratedSurfaceContainerMac* container = MapIDToContainer(id);
   if (container)
     container->SetSizeAndTransportDIB(width, height, transport_dib);
 }
 
 void AcceleratedSurfaceContainerManagerMac::MovePluginContainer(
     const webkit_glue::WebPluginGeometry& move) {
   AcceleratedSurfaceContainerMac* container = MapIDToContainer(move.window);
   if (container)
     container->MoveTo(move);
 }
 
-void AcceleratedSurfaceContainerManagerMac::Draw(CGLContextObj context) {
+void AcceleratedSurfaceContainerManagerMac::Draw(CGLContextObj context,
+                                                 bool draw_root_container) {
   // Clean up old texture objects. This is essentially a pre-emptive
   // cleanup, as the resources will be released when the OpenGL
   // context associated with the CAOpenGLLayer is destroyed. However,
   // if we render many plugins in the same layer, we should try to
   // eagerly reclaim their resources. Note also that the OpenGL
   // context must be current when performing the deletion, and it
   // seems risky to make the OpenGL context current at an arbitrary
   // point in time, which is why the deletion does not occur in the
   // container's destructor.
   for (std::vector<GLuint>::iterator iter =
            textures_pending_deletion_.begin();
        iter != textures_pending_deletion_.end();
        ++iter) {
     GLuint texture = *iter;
     glDeleteTextures(1, &texture);
   }
   textures_pending_deletion_.clear();
 
   glColorMask(true, true, true, true);
   glClearColor(0, 0, 0, 0);
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glDisable(GL_DEPTH_TEST);
   glDisable(GL_BLEND);
 
   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 
+  // Draw the root container, if any, first.
+  if (draw_root_container && root_container_) {
+    root_container_->Draw(context);
+  }
+
   for (PluginWindowToContainerMap::const_iterator i =
           plugin_window_to_container_map_.begin();
        i != plugin_window_to_container_map_.end(); ++i) {
     AcceleratedSurfaceContainerMac* container = i->second;
-    container->Draw(context);
+    if (container != root_container_) {
+      container->Draw(context);
+    }
   }
 
   // Unbind any texture from the texture target to ensure that the
   // next time through we will have to re-bind the texture and thereby
   // pick up modifications from the other process.
   GLenum target = GL_TEXTURE_RECTANGLE_ARB;
   glBindTexture(target, 0);
 
   glFlush();
 }
@@ skipping 19 matching lines @@
         gfx::PluginWindowHandle id) {
   PluginWindowToContainerMap::const_iterator i =
       plugin_window_to_container_map_.find(id);
   if (i != plugin_window_to_container_map_.end())
     return i->second;
 
   LOG(ERROR) << "Request for plugin container for unknown window id " << id;
 
   return NULL;
 }