cc: Route offscreen context creation for compositor to the browser.

cc/single_thread_proxy.cc

 // Copyright 2011 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/single_thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/debug/trace_event.h"
 #include "cc/draw_quad.h"
 #include "cc/layer_tree_host.h"
 #include "cc/layer_tree_impl.h"
 #include "cc/output_surface.h"
 #include "cc/prioritized_resource_manager.h"
 #include "cc/resource_update_controller.h"
 #include "cc/thread.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 
 namespace cc {
 
 scoped_ptr<Proxy> SingleThreadProxy::create(LayerTreeHost* layerTreeHost)
 {
     return make_scoped_ptr(new SingleThreadProxy(layerTreeHost)).PassAs<Proxy>();
 }
 
 SingleThreadProxy::SingleThreadProxy(LayerTreeHost* layerTreeHost)
     : Proxy(scoped_ptr<Thread>(NULL))
@@ skipping 106 matching lines @@
 
 bool SingleThreadProxy::recreateOutputSurface()
 {
     TRACE_EVENT0("cc", "SingleThreadProxy::recreateContext");
     DCHECK(Proxy::isMainThread());
     DCHECK(m_outputSurfaceLost);
 
     scoped_ptr<OutputSurface> outputSurface = m_layerTreeHost->createOutputSurface();
     if (!outputSurface.get())
         return false;
+    WebKit::WebGraphicsContext3D* offscreenContext3d = NULL;
+    GrContext* offscreenGrContext = NULL;
+    if (m_layerTreeHost->needsOffscreenContext()) {
+        offscreenContext3d = m_layerTreeHost->client()->createOrGetOffscreenContext3dForMainThread();
+        if (!offscreenContext3d ||
+            !offscreenContext3d->makeContextCurrent() ||
+            offscreenContext3d->getGraphicsResetStatusARB())
+        {

[piman, 2013/02/05 22:42:48]

nit: { on previous line

[danakj, 2013/02/05 22:56:00]

Oh gosh this file has become a frankenstyle. :X

+            return false;
+        }
+        offscreenGrContext = m_layerTreeHost->client()->createOrGetOffscreenGrContextForMainThread();
+    }
 
     bool initialized;
     {
         DebugScopedSetMainThreadBlocked mainThreadBlocked(this);
         DebugScopedSetImplThread impl(this);
         m_layerTreeHost->deleteContentsTexturesOnImplThread(m_layerTreeHostImpl->resourceProvider());
         initialized = m_layerTreeHostImpl->initializeRenderer(outputSurface.Pass());
         if (initialized) {
             m_RendererCapabilitiesForMainThread = m_layerTreeHostImpl->rendererCapabilities();
+            m_layerTreeHostImpl->resourceProvider()->setOffscreenContexts(
+                offscreenContext3d, offscreenGrContext);
         }
     }
 
     if (initialized)
         m_outputSurfaceLost = false;
 
     return initialized;
 }
 
 void SingleThreadProxy::renderingStats(RenderingStats* stats)
@@ skipping 200 matching lines @@
     NOTREACHED();
 }
 
 bool SingleThreadProxy::commitAndComposite()
 {
     DCHECK(Proxy::isMainThread());
 
     if (!m_layerTreeHost->initializeRendererIfNeeded())
         return false;
 
+    WebKit::WebGraphicsContext3D* offscreenContext3d = NULL;
+    GrContext* offscreenGrContext = NULL;
+    if (m_layerTreeHost->needsOffscreenContext()) {
+        offscreenContext3d = m_layerTreeHost->client()->createOrGetOffscreenContext3dForMainThread();
+        offscreenGrContext = m_layerTreeHost->client()->createOrGetOffscreenGrContextForMainThread();
+    }
+
     m_layerTreeHost->contentsTextureManager()->unlinkAndClearEvictedBackings();
 
     scoped_ptr<ResourceUpdateQueue> queue = make_scoped_ptr(new ResourceUpdateQueue);
     m_layerTreeHost->updateLayers(*(queue.get()), m_layerTreeHostImpl->memoryAllocationLimitBytes());
 
     m_layerTreeHost->willCommit();
     doCommit(queue.Pass());
-    bool result = doComposite();
+    bool result = doComposite(offscreenContext3d, offscreenGrContext);
     m_layerTreeHost->didBeginFrame();
     return result;
 }
 
-bool SingleThreadProxy::doComposite()
+    bool SingleThreadProxy::doComposite(WebKit::WebGraphicsContext3D* offscreenContext3d, GrContext* offscreenGrContext)
 {
     DCHECK(!m_outputSurfaceLost);
     {
         DebugScopedSetImplThread impl(this);
         base::AutoReset<bool> markInside(&m_insideDraw, true);
 
+        m_layerTreeHostImpl->resourceProvider()->setOffscreenContexts(
+            offscreenContext3d, offscreenGrContext);
+
         if (!m_layerTreeHostImpl->visible())
             return false;
 
         m_layerTreeHostImpl->animate(base::TimeTicks::Now(), base::Time::Now());
 
         // We guard prepareToDraw() with canDraw() because it always returns a valid frame, so can only
         // be used when such a frame is possible. Since drawLayers() depends on the result of
         // prepareToDraw(), it is guarded on canDraw() as well.
         if (!m_layerTreeHostImpl->canDraw())
             return false;
@@ skipping 29 matching lines @@
 }
 
 skia::RefPtr<SkPicture> SingleThreadProxy::capturePicture()
 {
     // Requires impl-side painting, which is only supported in threaded compositing.
     NOTREACHED();
     return skia::RefPtr<SkPicture>();
 }
 
 }  // namespace cc