Timeline: add support for deferred canvas rasterization

Source/core/platform/graphics/chromium/Canvas2DLayerBridge.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 12 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "core/platform/graphics/chromium/Canvas2DLayerBridge.h"
 
 #include "GrContext.h"
 #include "SkDevice.h"
 #include "SkSurface.h"
+#include "core/platform/PlatformInstrumentation.h"
 #include "core/platform/chromium/TraceEvent.h"
 #include "core/platform/graphics/GraphicsContext3D.h"
 #include "core/platform/graphics/GraphicsLayer.h"
 #include "core/platform/graphics/chromium/Canvas2DLayerManager.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCompositorSupport.h"
 #include "public/platform/WebGraphicsContext3D.h"
 
 using WebKit::WebExternalTextureLayer;
 using WebKit::WebGraphicsContext3D;
@@ skipping 143 matching lines @@
             // Invalidate texture state in case the compositor altered it since the copy-on-write.
             mailboxInfo->m_image->getTexture()->invalidateCachedState();
             mailboxInfo->m_image.reset(0);
             mailboxInfo->m_status = MailboxAvailable;
         }
     }
     SkAutoTUnref<SkImage> image(m_canvas->newImageSnapshot());
     // Early exit if canvas was not drawn to since last prepareMailbox
     if (image->uniqueID() == m_lastImageId)
         return false;
+    PlatformInstrumentation::willRasterizeCanvas();
     m_lastImageId = image->uniqueID();
 
     mailboxInfo = createMailboxInfo();
     mailboxInfo->m_status = MailboxInUse;
     mailboxInfo->m_image.swap(&image);
     // Because of texture sharing with the compositor, we must invalidate
     // the state cached in skia so that the deferred copy on write
     // in SkSurface_Gpu does not make any false assumptions.
     mailboxInfo->m_image->getTexture()->invalidateCachedState();
 
@@ skipping 10 matching lines @@
     m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR);
     m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
     m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
     m_context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
     context()->produceTextureCHROMIUM(GraphicsContext3D::TEXTURE_2D, mailboxInfo->m_mailbox.name);
     context()->flush();
     mailboxInfo->m_mailbox.syncPoint = context()->insertSyncPoint();
     m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, savedTexBinding);
 
     *outMailbox = mailboxInfo->m_mailbox;
+    PlatformInstrumentation::didRasterizeCanvas();
     return true;
 #else
     ASSERT_NOT_REACHED();
     return false;
 #endif
 }
 
 #if ENABLE(CANVAS_USES_MAILBOX)
 Canvas2DLayerBridge::MailboxInfo* Canvas2DLayerBridge::createMailboxInfo() {
     MailboxInfo* mailboxInfo;
@@ skipping 63 matching lines @@
     // This copy constructor should only be used for Vector reallocation
     // Assuming 'other' is to be destroyed, we swap m_image ownership
     // rather than do a refcount dance.
     memcpy(&m_mailbox, &other.m_mailbox, sizeof(m_mailbox));
     m_image.swap(const_cast<SkAutoTUnref<SkImage>*>(&other.m_image));
     m_status = other.m_status;
 }
 #endif
 
 }