3D Compositing in <browser>, first draft.

content/browser/browser_plugin/browser_plugin_host_helper.cc

Index: content/browser/browser_plugin/browser_plugin_host_helper.cc
diff --git a/content/browser/browser_plugin/browser_plugin_host_helper.cc b/content/browser/browser_plugin/browser_plugin_host_helper.cc
index 8b0c6f959010a51cc685fd4e87fe5ef2014054b0..8dcd1396ed2be728e9b05ec77775222c8b383d97 100644
--- a/content/browser/browser_plugin/browser_plugin_host_helper.cc
+++ b/content/browser/browser_plugin/browser_plugin_host_helper.cc
@@ -8,20 +8,100 @@
 #include "content/browser/browser_plugin/browser_plugin_host.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/common/browser_plugin_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/render_process_host.h"
+#include "content/common/gpu/gpu_messages.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "ui/gfx/size.h"
 
 namespace content {
 
+class BrowserPluginCompositingDelegate :
+    public RenderWidgetHostViewBase::CompositingDelegate {
+ public:
+  virtual gfx::GLSurfaceHandle GetCompositingSurface() {
+    // This is the signal for having no context
+    if (helper_->surface_params_.texture_id[0] == 0) {
+      DCHECK(helper_->surface_params_.texture_id[1] == 0);
+      return gfx::GLSurfaceHandle();
+    } else {
+      DCHECK(helper_->surface_params_.texture_id[1] != 0);
+      DCHECK(helper_->surface_params_.texture_id[0] !=
+          helper_->surface_params_.texture_id[1]);
+    }
+
+    gfx::GLSurfaceHandle handle =
+        gfx::GLSurfaceHandle(gfx::kNullPluginWindow, true);
+    handle.parent_gpu_process_id = helper_->surface_params_.gpu_process_id;
+    handle.parent_client_id = helper_->surface_params_.client_id;
+    handle.parent_context_id = helper_->surface_params_.context_id;
+    handle.parent_texture_id[0] = helper_->surface_params_.texture_id[0];
+    handle.parent_texture_id[1] = helper_->surface_params_.texture_id[1];
+    handle.sync_point = helper_->surface_params_.sync_point;
+    return handle;
+  }
+
+  virtual bool ResizeNeedsNewSurface() { return false; }
+  BrowserPluginHostHelper* helper_;
+  BrowserPluginCompositingDelegate(BrowserPluginHostHelper* helper)
+    : helper_(helper) {
+  }
+
+  virtual void AcceleratedSurfaceBuffersSwapped(
+      const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
+      int gpu_host_id) OVERRIDE {
+    BrowserPlugin_SwapInfo info;
+    info.route_id = params.route_id;
+    info.gpu_host_id = gpu_host_id;
+
+    helper_->browser_plugin_host_->SendBuffersSwappedToEmbedder(
+        params.surface_handle,
+        info);
+  }
+
+  virtual void AcceleratedSurfacePostSubBuffer(
+      const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
+      int gpu_host_id) OVERRIDE {
+    // TODO(scshunt): We don't actually support posting a sub-buffer.
+    // However, we can't turn that off here; the TextureImageTransportSurface
+    // needs to know not to accept sub-buffers. Try to do an entire swap
+    // instead, which is probably better than ignoring the post altogether.
+    BrowserPlugin_SwapInfo info;
+    info.route_id = params.route_id;
+    info.gpu_host_id = gpu_host_id;
+
+    helper_->browser_plugin_host_->SendBuffersSwappedToEmbedder(
+        params.surface_handle,
+        info);
+  }
+
+  virtual void AcceleratedSurfaceNew(
+      int32 width_in_pixel,
+      int32 height_in_pixel,
+      uint64 surface_handle) {
+    helper_->browser_plugin_host_->SendSurfaceResizeToEmbedder(
+        gfx::Size(width_in_pixel, height_in_pixel));
+  }
+  virtual void AcceleratedSurfaceRelease(
+      uint64 surface_handle) {
+  }
+};
+
 BrowserPluginHostHelper::BrowserPluginHostHelper(
     BrowserPluginHost* browser_plugin_host,
-    RenderViewHost* render_view_host)
+    RenderViewHost* render_view_host,
+    const BrowserPluginHostMsg_Surface_Params& params)
     : RenderViewHostObserver(render_view_host),
-      browser_plugin_host_(browser_plugin_host) {
+      browser_plugin_host_(browser_plugin_host),
+      surface_params_(params) {
+  if (browser_plugin_host->embedder_render_process_host())
+    static_cast<RenderWidgetHostViewBase*>(render_view_host->GetView())->
+        SetCompositingDelegate(
+            scoped_ptr<RenderWidgetHostViewBase::CompositingDelegate>(
+                new BrowserPluginCompositingDelegate(this)).Pass());
 }
 
 BrowserPluginHostHelper::~BrowserPluginHostHelper() {
@@ -39,6 +119,9 @@ bool BrowserPluginHostHelper::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_ResizeGuest, OnResizeGuest)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_UpdateRect_ACK, OnUpdateRectACK)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_SetFocus, OnSetFocus)
+    IPC_MESSAGE_HANDLER(
+        BrowserPluginHostMsg_BuffersSwappedACK,
+        OnSwapBuffersACK)
     IPC_MESSAGE_HANDLER_GENERIC(BrowserPluginHostMsg_HandleInputEvent,
         OnHandleInputEvent(*static_cast<const IPC::SyncMessage*>(&message),
                            &handled))
@@ -68,13 +151,15 @@ void BrowserPluginHostHelper::OnNavigateGuest(
     int instance_id,
     long long frame_id,
     const std::string& src,
-    const gfx::Size& size) {
+    const gfx::Size& size,
+    const BrowserPluginHostMsg_Surface_Params& params) {
   browser_plugin_host_->NavigateGuest(
       render_view_host(),
       instance_id,
       frame_id,
       src,
-      size);
+      size,
+      params);
 }
 
 void BrowserPluginHostHelper::OnResizeGuest(
@@ -129,6 +214,15 @@ void BrowserPluginHostHelper::OnTakeFocus(bool reverse) {
   browser_plugin_host_->TakeFocus(0, reverse);
 }
 
+void BrowserPluginHostHelper::OnSwapBuffersACK(
+    const BrowserPlugin_SwapInfo& info,
+    uint32 sync_point) {
+  RenderWidgetHostImpl::AcknowledgeBufferPresent(
+      info.route_id,
+      info.gpu_host_id,
+      sync_point);
+}
+
 void BrowserPluginHostHelper::OnShowWidget(
     int route_id,
     const gfx::Rect& initial_pos) {