Adds SVGImageElement as a CanvasImageSource

third_party/WebKit/Source/core/svg/SVGImageElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Rob Buis <buis@kde.org>
  * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 186 matching lines @@
 
 const AtomicString SVGImageElement::imageSourceURL() const {
   return AtomicString(hrefString());
 }
 
 void SVGImageElement::didMoveToNewDocument(Document& oldDocument) {
   imageLoader().elementDidMoveToNewDocument();
   SVGGraphicsElement::didMoveToNewDocument(oldDocument);
 }
 
+PassRefPtr<Image> SVGImageElement::getSourceImageForCanvas(

[fs, 2017/03/01 21:20:41]

This (and other method implementations) appear to be missing the intrinsic
sizing handling from HTMLImageElement. AFAIK the spec pretty much calls out that
SVGImageElement and HTMLImageElement are treated identically so there would seem
to be a decent chance of using the same code for these (something keyed off the
ImageLoader would probably make sense?)

[fserb, 2017/03/06 21:05:13]

Done.

+    SourceImageStatus* status,
+    AccelerationHint hint,
+    SnapshotReason reason,
+    const FloatSize& defaultObjectSize) const {
+  if (!imageLoader().imageComplete() || !cachedImage()) {
+    *status = IncompleteSourceImageStatus;
+    return nullptr;
+  }
+
+  if (cachedImage()->errorOccurred()) {
+    *status = UndecodableSourceImageStatus;
+    return nullptr;
+  }
+
+  *status = NormalSourceImageStatus;
+  return cachedImage()->getImage()->imageForDefaultFrame();
+}
+
+bool SVGImageElement::wouldTaintOrigin(
+    SecurityOrigin* destinationSecurityOrigin) const {
+  if (!cachedImage())
+    return false;
+  return !cachedImage()->isAccessAllowed(destinationSecurityOrigin);
+}
+
+FloatSize SVGImageElement::elementSize(
+    const FloatSize& defaultObjectSize) const {
+  if (!cachedImage())
+    return FloatSize();
+  return FloatSize(cachedImage()->getImage()->size());
+}
+
+bool SVGImageElement::isAccelerated() const {
+  return false;
+}
+
+int SVGImageElement::sourceWidth() {
+  if (!cachedImage())
+    return 0;
+  return cachedImage()->getImage()->width();
+}
+
+int SVGImageElement::sourceHeight() {
+  if (!cachedImage())
+    return 0;
+  return cachedImage()->getImage()->height();
+}
+
 }  // namespace blink