Index: third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp |
diff --git a/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp b/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..bc5612619ee910980c9c740422295a099f78f112 |
--- /dev/null |
+++ b/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp |
@@ -0,0 +1,67 @@ |
+// 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 "modules/imagebitmap/ImageBitmapRenderingContext.h" |
+ |
+#include "core/frame/ImageBitmap.h" |
+#include "platform/graphics/GraphicsContext.h" |
+#include "platform/graphics/StaticBitmapImage.h" |
+#include "third_party/skia/include/core/SkImage.h" |
+#include "third_party/skia/include/core/SkSurface.h" |
+ |
+namespace blink { |
+ |
+ImageBitmapRenderingContext::ImageBitmapRenderingContext(HTMLCanvasElement* canvas, CanvasContextCreationAttributes attrs, Document& document) |
+ : CanvasRenderingContext(canvas) |
+ , m_hasAlpha(attrs.alpha()) |
+{ } |
+ |
+ImageBitmapRenderingContext::~ImageBitmapRenderingContext() { } |
+ |
+void ImageBitmapRenderingContext::transferImageBitmap(ImageBitmap* imageBitmap) |
+{ |
+ m_image = imageBitmap->bitmapImage(); |
+ if (!m_image) |
+ return; |
+ |
+ RefPtr<SkImage> skImage = m_image->imageForCurrentFrame(); |
+ if (skImage->isTextureBacked()) { |
+ // TODO(junov): crbug.com/585607 Eliminate this readback and use an ExternalTextureLayer |
+ RefPtr<SkSurface> surface = adoptRef(SkSurface::NewRasterN32Premul(skImage->width(), skImage->height())); |
+ if (!surface) { |
+ // silent failure |
+ m_image.clear(); |
+ return; |
+ } |
+ surface->getCanvas()->drawImage(skImage.get(), 0, 0); |
+ m_image = StaticBitmapImage::create(adoptRef(surface->newImageSnapshot())); |
+ } |
+ canvas()->didDraw(FloatRect(FloatPoint(), FloatSize(m_image->width(), m_image->height()))); |
+} |
+ |
+bool ImageBitmapRenderingContext::paint(GraphicsContext& gc, const IntRect& r) |
+{ |
+ if (!m_image) |
+ return true; |
+ |
+ // With impl-side painting, it is unsafe to use a gpu-backed SkImage |
+ ASSERT(!m_image->imageForCurrentFrame()->isTextureBacked()); |
+ gc.drawImage(m_image.get(), r, m_hasAlpha ? SkXfermode::kSrcOver_Mode : SkXfermode::kSrc_Mode); |
+ |
+ return true; |
+} |
+ |
+PassOwnPtrWillBeRawPtr<CanvasRenderingContext> ImageBitmapRenderingContext::Factory::create(HTMLCanvasElement* canvas, const CanvasContextCreationAttributes& attrs, Document& document) |
+{ |
+ if (!RuntimeEnabledFeatures::experimentalCanvasFeaturesEnabled()) |
+ return nullptr; |
+ return adoptPtrWillBeNoop(new ImageBitmapRenderingContext(canvas, attrs, document)); |
+} |
+ |
+void ImageBitmapRenderingContext::stop() |
+{ |
+ m_image.clear(); |
+} |
+ |
+} // blink |