Adds SVGImageElement as a ImageBitmapSource

third_party/WebKit/Source/core/html/canvas/CanvasImageElementSource.cpp

-// Copyright 2017 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 "core/html/canvas/CanvasImageElementSource.h"
-
-#include "core/layout/LayoutObject.h"
-#include "core/loader/ImageLoader.h"
-#include "core/svg/graphics/SVGImageForContainer.h"
-
-namespace blink {
-
-ImageResourceContent* CanvasImageElementSource::cachedImage() const {
-  return imageLoader().image();
-}
-
-const Element& CanvasImageElementSource::element() const {
-  return *imageLoader().element();
-}
-
-bool CanvasImageElementSource::isSVGSource() const {
-  return cachedImage() && cachedImage()->getImage()->isSVGImage();
-}
-
-PassRefPtr<Image> CanvasImageElementSource::getSourceImageForCanvas(
-    SourceImageStatus* status,
-    AccelerationHint,
-    SnapshotReason,
-    const FloatSize& defaultObjectSize) const {
-  if (!imageLoader().imageComplete() || !cachedImage()) {
-    *status = IncompleteSourceImageStatus;
-    return nullptr;
-  }
-
-  if (cachedImage()->errorOccurred()) {
-    *status = UndecodableSourceImageStatus;
-    return nullptr;
-  }
-
-  RefPtr<Image> sourceImage;
-  if (cachedImage()->getImage()->isSVGImage()) {
-    UseCounter::count(element().document(), UseCounter::SVGInCanvas2D);
-    SVGImage* svgImage = toSVGImage(cachedImage()->getImage());
-    IntSize imageSize =
-        roundedIntSize(svgImage->concreteObjectSize(defaultObjectSize));
-    sourceImage = SVGImageForContainer::create(
-        svgImage, imageSize, 1,
-        element().document().completeURL(element().imageSourceURL()));
-  } else {
-    sourceImage = cachedImage()->getImage();
-  }
-
-  *status = NormalSourceImageStatus;
-  return sourceImage->imageForDefaultFrame();
-}
-
-bool CanvasImageElementSource::wouldTaintOrigin(
-    SecurityOrigin* destinationSecurityOrigin) const {
-  return cachedImage() &&
-         !cachedImage()->isAccessAllowed(destinationSecurityOrigin);
-}
-
-FloatSize CanvasImageElementSource::elementSize(
-    const FloatSize& defaultObjectSize) const {
-  ImageResourceContent* image = cachedImage();
-  if (!image)
-    return FloatSize();
-
-  if (image->getImage() && image->getImage()->isSVGImage()) {
-    return toSVGImage(cachedImage()->getImage())
-        ->concreteObjectSize(defaultObjectSize);
-  }
-
-  return FloatSize(image->imageSize(
-      LayoutObject::shouldRespectImageOrientation(element().layoutObject()),
-      1.0f));
-}
-
-FloatSize CanvasImageElementSource::defaultDestinationSize(
-    const FloatSize& defaultObjectSize) const {
-  ImageResourceContent* image = cachedImage();
-  if (!image)
-    return FloatSize();
-
-  if (image->getImage() && image->getImage()->isSVGImage()) {
-    return toSVGImage(cachedImage()->getImage())
-        ->concreteObjectSize(defaultObjectSize);
-  }
-
-  LayoutSize size;
-  size = image->imageSize(
-      LayoutObject::shouldRespectImageOrientation(element().layoutObject()),
-      1.0f);
-  return FloatSize(size);
-}
-
-bool CanvasImageElementSource::isAccelerated() const {
-  return false;
-}
-
-const KURL& CanvasImageElementSource::sourceURL() const {
-  return cachedImage()->response().url();
-}
-
-int CanvasImageElementSource::sourceWidth() {
-  SourceImageStatus status;
-  RefPtr<Image> image =
-      getSourceImageForCanvas(&status, PreferNoAcceleration,
-                              SnapshotReasonUnknown, sourceDefaultObjectSize());
-  return image->width();
-}
-
-int CanvasImageElementSource::sourceHeight() {
-  SourceImageStatus status;
-  RefPtr<Image> image =
-      getSourceImageForCanvas(&status, PreferNoAcceleration,
-                              SnapshotReasonUnknown, sourceDefaultObjectSize());
-  return image->height();
-}
-
-bool CanvasImageElementSource::isOpaque() const {
-  Image* image = const_cast<Element&>(element()).imageContents();
-  return image && image->currentFrameKnownToBeOpaque();
-}
-
-}  // namespace blink