Add display list fallback reason histograms for 2D canvas

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

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 78 matching lines @@
 ImageBuffer::~ImageBuffer()
 {
     ImageBuffer::s_globalGPUMemoryUsage -= m_gpuMemoryUsage;
 }
 
 SkCanvas* ImageBuffer::canvas() const
 {
     return m_surface->canvas();
 }
 
-void ImageBuffer::disableDeferral() const
+void ImageBuffer::disableDeferral(DisableDeferralReason reason) const
 {
-    return m_surface->disableDeferral();
+    return m_surface->disableDeferral(reason);
 }
 
 bool ImageBuffer::writePixels(const SkImageInfo& info, const void* pixels, size_t rowBytes, int x, int y)
 {
     return m_surface->writePixels(info, pixels, rowBytes, x, y);
 }
 
 bool ImageBuffer::isSurfaceValid() const
 {
     return m_surface->isValid();
@@ skipping 26 matching lines @@
     if (m_client)
         m_client->notifySurfaceInvalid();
 }
 
 void ImageBuffer::resetCanvas(SkCanvas* canvas) const
 {
     if (m_client)
         m_client->restoreCanvasMatrixClipStack(canvas);
 }
 
-PassRefPtr<SkImage> ImageBuffer::newSkImageSnapshot(AccelerationHint hint) const
+PassRefPtr<SkImage> ImageBuffer::newSkImageSnapshot(AccelerationHint hint, SnapshotReason reason) const
 {
     if (m_snapshotState == InitialSnapshotState)
         m_snapshotState = DidAcquireSnapshot;
 
     if (!isSurfaceValid())
         return nullptr;
-    return m_surface->newImageSnapshot(hint);
+    return m_surface->newImageSnapshot(hint, reason);
 }
 
-PassRefPtr<Image> ImageBuffer::newImageSnapshot(AccelerationHint hint) const
+PassRefPtr<Image> ImageBuffer::newImageSnapshot(AccelerationHint hint, SnapshotReason reason) const
 {
-    RefPtr<SkImage> snapshot = newSkImageSnapshot(hint);
+    RefPtr<SkImage> snapshot = newSkImageSnapshot(hint, reason);
     if (!snapshot)
         return nullptr;
     return StaticBitmapImage::create(snapshot);
 }
 
 void ImageBuffer::didDraw(const FloatRect& rect) const
 {
     if (m_snapshotState == DidAcquireSnapshot)
         m_snapshotState = DrawnToAfterSnapshot;
     m_surface->didDraw(rect);
 }
 
 WebLayer* ImageBuffer::platformLayer() const
 {
     return m_surface->layer();
 }
 
 bool ImageBuffer::copyToPlatformTexture(WebGraphicsContext3D* context, Platform3DObject texture, GLenum internalFormat, GLenum destType, GLint level, bool premultiplyAlpha, bool flipY)
 {
     if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(GL_TEXTURE_2D, internalFormat, destType, level))
         return false;
 
     if (!isSurfaceValid())
         return false;
 
-    RefPtr<const SkImage> textureImage = m_surface->newImageSnapshot(PreferAcceleration);
+    RefPtr<const SkImage> textureImage = m_surface->newImageSnapshot(PreferAcceleration, SnapshotReasonCopyToWebGLTexture);
     if (!textureImage)
         return false;
 
     if (!m_surface->isAccelerated())
         return false;
 
 
     ASSERT(textureImage->isTextureBacked()); // isAccelerated() check above should guarantee this
     // Get the texture ID, flushing pending operations if needed.
     Platform3DObject textureId = textureImage->getTextureHandle(true);
@@ skipping 63 matching lines @@
 
 void ImageBuffer::draw(GraphicsContext& context, const FloatRect& destRect, const FloatRect* srcPtr, SkXfermode::Mode op)
 {
     if (!isSurfaceValid())
         return;
 
     FloatRect srcRect = srcPtr ? *srcPtr : FloatRect(FloatPoint(), FloatSize(size()));
     m_surface->draw(context, destRect, srcRect, op);
 }
 
-void ImageBuffer::flush()
+void ImageBuffer::flush(FlushReason reason)
 {
     if (m_surface->canvas()) {
-        m_surface->flush();
+        m_surface->flush(reason);
     }
 }
 
-void ImageBuffer::flushGpu()
+void ImageBuffer::flushGpu(FlushReason reason)
 {
     if (m_surface->canvas()) {
-        m_surface->flushGpu();
+        m_surface->flushGpu(reason);
     }
 }
 
 bool ImageBuffer::getImageData(Multiply multiplied, const IntRect& rect, WTF::ArrayBufferContents& contents) const
 {
     Checked<int, RecordOverflow> dataSize = 4;
     dataSize *= rect.width();
     dataSize *= rect.height();
     if (dataSize.hasOverflowed())
         return false;
 
     if (!isSurfaceValid()) {
         WTF::ArrayBufferContents result(rect.width() * rect.height(), 4, WTF::ArrayBufferContents::NotShared, WTF::ArrayBufferContents::ZeroInitialize);
         result.transfer(contents);
         return true;
     }
 
     ASSERT(canvas());
-    RefPtr<SkImage> snapshot = m_surface->newImageSnapshot(PreferNoAcceleration);
+    RefPtr<SkImage> snapshot = m_surface->newImageSnapshot(PreferNoAcceleration, SnapshotReasonGetImageData);
     if (!snapshot)
         return false;
 
     const bool mayHaveStrayArea =
         m_surface->isAccelerated() // GPU readback may fail silently
         || rect.x() < 0
         || rect.y() < 0
         || rect.maxX() > m_surface->size().width()
         || rect.maxY() > m_surface->size().height();
     WTF::ArrayBufferContents result(
@@ skipping 90 matching lines @@
     ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
 
     Vector<unsigned char> result;
     if (!encodeImage(mimeType, quality, &result))
         return "data:,";
 
     return "data:" + mimeType + ";base64," + base64Encode(result);
 }
 
 } // namespace blink