Use newImageSnapshot() to get an image from a Canvas

Source/platform/graphics/BitmapPattern.cpp

+// Copyright 2014 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 "config.h"
+#include "platform/graphics/BitmapPattern.h"
+
+#include "platform/graphics/skia/SkiaUtils.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkColorShader.h"
+#include <v8.h>
+
+namespace blink {
+
+BitmapPattern::BitmapPattern(PassRefPtr<Image> image, RepeatMode repeatMode)
+: BitmapPatternBase(repeatMode, 0 )
+{
+    if (image) {
+        // If image is animated, what about the pattern?
+        m_tileImage = image->nativeImageForCurrentFrame();
+
+        if (m_tileImage)
+            adjustExternalMemoryAllocated(m_tileImage->bitmap().getSafeSize());
+    }
+}
+
+PassRefPtr<SkShader> BitmapPattern::createShader()
+{
+    if (!m_tileImage) {
+        return adoptRef(new SkColorShader(SK_ColorTRANSPARENT));
+    }
+
+    SkMatrix localMatrix = affineTransformToSkMatrix(m_patternSpaceTransformation);
+
+    if (isRepeatXY()) {
+        return adoptRef(SkShader::CreateBitmapShader(m_tileImage->bitmap(), SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, &localMatrix));
+    }
+
+    return BitmapPatternBase::createShader();
+}
+
+SkImageInfo BitmapPattern::getBitmapInfo()
+{
+    return m_tileImage->bitmap().info();
+}
+
+void BitmapPattern::drawBitmapToCanvas(SkCanvas& canvas, SkPaint& paint)
+{
+    canvas.drawBitmap(m_tileImage->bitmap(), SkIntToScalar(0), SkIntToScalar(0), &paint);
+}
+
+} // namespace