Compositing Layer update for OffscreenCanvas resize

third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.cpp

 // Copyright 2016 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 "platform/graphics/OffscreenCanvasFrameDispatcherImpl.h"
 
 #include "cc/output/compositor_frame.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "platform/CrossThreadFunctional.h"
@@ skipping 16 matching lines @@
 
 namespace blink {
 
 OffscreenCanvasFrameDispatcherImpl::OffscreenCanvasFrameDispatcherImpl(
     uint32_t clientId,
     uint32_t sinkId,
     uint32_t localId,
     uint64_t nonceHigh,
     uint64_t nonceLow,
     int canvasId,
-    int width,
-    int height)
-    : m_surfaceId(
-          cc::FrameSinkId(clientId, sinkId),
-          cc::LocalFrameId(
-              localId,
-              base::UnguessableToken::Deserialize(nonceHigh, nonceLow))),
-      m_width(width),
-      m_height(height),
+    unsigned width,
+    unsigned height)
+    : m_frameSinkId(cc::FrameSinkId(clientId, sinkId)),
+      m_width(clampTo<int>(width)),
+      m_height(clampTo<int>(height)),
       m_nextResourceId(1u),
       m_binding(this),
       m_placeholderCanvasId(canvasId) {
   DCHECK(!m_sink.is_bound());
   mojom::blink::OffscreenCanvasCompositorFrameSinkProviderPtr provider;
   Platform::current()->interfaceProvider()->getInterface(
       mojo::GetProxy(&provider));
-  provider->CreateCompositorFrameSink(m_surfaceId,
+  cc::SurfaceId surfaceId(
+      m_frameSinkId,
+      cc::LocalFrameId(
+          localId, base::UnguessableToken::Deserialize(nonceHigh, nonceLow)));
+
+  provider->CreateCompositorFrameSink(surfaceId,
                                       m_binding.CreateInterfacePtrAndBind(),
                                       mojo::GetProxy(&m_sink));
 }
 
 void OffscreenCanvasFrameDispatcherImpl::setTransferableResourceToSharedBitmap(
     cc::TransferableResource& resource,
     RefPtr<StaticBitmapImage> image) {
   std::unique_ptr<cc::SharedBitmap> bitmap =
       Platform::current()->allocateSharedBitmap(IntSize(m_width, m_height));
   if (!bitmap)
@@ skipping 330 matching lines @@
   m_cachedTextureIds.remove(resourceId);
 }
 
 bool OffscreenCanvasFrameDispatcherImpl::verifyImageSize(
     const IntSize imageSize) {
   if (imageSize.width() == m_width && imageSize.height() == m_height)
     return true;
   return false;
 }
 
+void OffscreenCanvasFrameDispatcherImpl::reshape(unsigned width,
+                                                 unsigned height) {
+  m_width = clampTo<int>(width);
+  m_height = clampTo<int>(height);
+}
+
 }  // namespace blink