publish canvas context API stat metrics

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 30 matching lines @@
 #include "core/html/canvas/CanvasAsyncBlobCreator.h"
 #include "core/html/canvas/CanvasContextCreationAttributes.h"
 #include "core/html/canvas/CanvasFontCache.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/CanvasRenderingContextFactory.h"
 #include "core/layout/LayoutHTMLCanvas.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/MIMETypeRegistry.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/graphics/Canvas2DImageBufferSurface.h"
+#include "platform/graphics/CanvasMetrics.h"
 #include "platform/graphics/ExpensiveCanvasHeuristicParameters.h"
 #include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/RecordingImageBufferSurface.h"
 #include "platform/graphics/StaticBitmapImage.h"
 #include "platform/graphics/UnacceleratedImageBufferSurface.h"
 #include "platform/graphics/gpu/AcceleratedImageBufferSurface.h"
 #include "platform/transforms/AffineTransform.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebTraceLocation.h"
 #include <math.h>
@@ skipping 49 matching lines @@
     : HTMLElement(canvasTag, document)
     , DocumentVisibilityObserver(document)
     , m_size(DefaultWidth, DefaultHeight)
     , m_ignoreReset(false)
     , m_externallyAllocatedMemory(0)
     , m_originClean(true)
     , m_didFailToCreateImageBuffer(false)
     , m_imageBufferIsClear(false)
 {
     setHasCustomStyleCallbacks();
+    CanvasMetrics::countCanvasContextUsage(CanvasMetrics::CanvasCreated);
 }
 
 DEFINE_NODE_FACTORY(HTMLCanvasElement)
 
 HTMLCanvasElement::~HTMLCanvasElement()
 {
     v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(-m_externallyAllocatedMemory);
 #if !ENABLE(OILPAN)
     // Ensure these go away before the ImageBuffer.
     m_context.clear();
@@ skipping 516 matching lines @@
         // If 3d, but the use of the canvas will be for non-accelerated content
         // then make a non-accelerated ImageBuffer. This means copying the internal
         // Image will require a pixel readback, but that is unavoidable in this case.
         return adoptPtr(new AcceleratedImageBufferSurface(deviceSize, opacityMode));
     }
 
     if (shouldAccelerate(deviceSize)) {
         if (document().settings())
             *msaaSampleCount = document().settings()->accelerated2dCanvasMSAASampleCount();
         OwnPtr<ImageBufferSurface> surface = adoptPtr(new Canvas2DImageBufferSurface(deviceSize, *msaaSampleCount, opacityMode, Canvas2DLayerBridge::EnableAcceleration));
-        if (surface->isValid())
+        if (surface->isValid()) {
+            CanvasMetrics::countCanvasContextUsage(CanvasMetrics::GPUAccelerated2DCanvasImageBufferCreated);
             return surface.release();
+        }
+        CanvasMetrics::countCanvasContextUsage(CanvasMetrics::GPUAccelerated2DCanvasImageBufferCreationFailed);
     }
 
     OwnPtr<RecordingImageBufferFallbackSurfaceFactory> surfaceFactory = adoptPtr(new UnacceleratedSurfaceFactory());
 
     if (shouldUseDisplayList(deviceSize)) {
         OwnPtr<ImageBufferSurface> surface = adoptPtr(new RecordingImageBufferSurface(deviceSize, surfaceFactory.release(), opacityMode));
-        if (surface->isValid())
+        if (surface->isValid()) {
+            CanvasMetrics::countCanvasContextUsage(CanvasMetrics::DisplayList2DCanvasImageBufferCreated);
             return surface.release();
+        }
         surfaceFactory = adoptPtr(new UnacceleratedSurfaceFactory()); // recreate because previous one was released
     }
-
-    return surfaceFactory->createSurface(deviceSize, opacityMode);
+    auto surface = surfaceFactory->createSurface(deviceSize, opacityMode);
+    if (!surface->isValid()) {
+        CanvasMetrics::countCanvasContextUsage(CanvasMetrics::Unaccelerated2DCanvasImageBufferCreationFailed);
+    } else {
+        CanvasMetrics::countCanvasContextUsage(CanvasMetrics::Unaccelerated2DCanvasImageBufferCreated);
+    }
+    return surface;
 }
 
 void HTMLCanvasElement::createImageBuffer()
 {
     createImageBufferInternal(nullptr);
     if (m_didFailToCreateImageBuffer && m_context->is2d() && !size().isEmpty())
         m_context->loseContext(CanvasRenderingContext::SyntheticLostContext);
 }
 
 void HTMLCanvasElement::createImageBufferInternal(PassOwnPtr<ImageBufferSurface> externalSurface)
@@ skipping 240 matching lines @@
 {
     return FloatSize(width(), height());
 }
 
 bool HTMLCanvasElement::isOpaque() const
 {
     return m_context && !m_context->hasAlpha();
 }
 
 } // blink