Aura: Browser-side changes for Composite-To-Mailbox

cc/output_surface.cc

 // Copyright (c) 2013 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 "cc/output_surface.h"
 
 #include "base/logging.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
+#include "third_party/khronos/GLES2/gl2.h"
+#include "third_party/khronos/GLES2/gl2ext.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/size.h"
 
 namespace cc {
 
 OutputSurface::OutputSurface(
     scoped_ptr<WebKit::WebGraphicsContext3D> context3d)
     : client_(NULL),
       context3d_(context3d.Pass()) {
 }
 
 OutputSurface::OutputSurface(
@@ skipping 19 matching lines @@
   client_ = client;
   if (!context3d_)
     return true;
   return context3d_->makeContextCurrent();
 }
 
 void OutputSurface::SendFrameToParentCompositor(CompositorFrame*) {
   NOTIMPLEMENTED();
 }
 
+void OutputSurface::EnsureBackbuffer() {
+  DCHECK(context3d_);
+  context3d_->ensureBackbufferCHROMIUM();
+}
+
+void OutputSurface::DiscardBackbuffer() {
+  DCHECK(context3d_);

[no sievers, 2013/02/27 00:12:30]

Really it should query the extension here like it did before my patch. But I'd
have to do it lazily here or so, because the context3d passed into the
constructor is not initialized yet and cannot be used there.

[piman, 2013/02/27 01:07:13]

You can check in BindToClient, which has to be called before DiscardBackbuffer
(and friends).

[no sievers, 2013/02/27 21:07:40]

Done.

+  context3d_->discardBackbufferCHROMIUM();
+}
+
+void OutputSurface::Reshape(const gfx::Size& size) {
+  DCHECK(context3d_);
+  context3d_->reshape(size.width(), size.height());
+}
+
+void OutputSurface::BindFramebuffer() {
+  DCHECK(context3d_);
+  context3d_->bindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+void OutputSurface::SwapBuffers() {
+  DCHECK(context3d_);
+  // Note that currently this has the same effect as swapBuffers; we should
+  // consider exposing a different entry point on WebGraphicsContext3D.
+  context3d_->prepareTexture();
+}
+
+void OutputSurface::PostSubBuffer(const gfx::Rect& rect) {
+  DCHECK(context3d_);
+  context3d_->postSubBufferCHROMIUM(
+      rect.x(), rect.y(), rect.width(), rect.height());
+}
+
 }  // namespace cc