Use union type in ImageBitmapFactories.idl

third_party/WebKit/Source/core/html/HTMLImageElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * 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 16 matching lines @@
 #include "core/CSSPropertyNames.h"
 #include "core/HTMLNames.h"
 #include "core/MediaTypeNames.h"
 #include "core/css/MediaQueryMatcher.h"
 #include "core/css/MediaValuesDynamic.h"
 #include "core/css/parser/SizesAttributeParser.h"
 #include "core/dom/Attribute.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/fetch/ImageResource.h"
+#include "core/frame/ImageBitmap.h"
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/html/HTMLImageFallbackHelper.h"
 #include "core/html/HTMLSourceElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/html/parser/HTMLSrcsetParser.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/layout/LayoutBlockFlow.h"
@@ skipping 622 matching lines @@
     // If it doesn't exist, we just return the default.
     sourceSizeValue(element, document(), value);
     return value;
 }
 
 void HTMLImageElement::forceReload() const
 {
     imageLoader().updateFromElement(ImageLoader::UpdateForcedReload, m_referrerPolicy);
 }
 
+ScriptPromise HTMLImageElement::createImageBitmap(ScriptState* scriptState, EventTarget& eventTarget, ImageBitmapSource* bitmapSource, int sx, int sy, int sw, int sh, ExceptionState& exceptionState)
+{
+    ASSERT(eventTarget.toDOMWindow());
+    HTMLImageElement* image = static_cast<HTMLImageElement*>(bitmapSource);
+    if (!image->cachedImage()) {
+        exceptionState.throwDOMException(InvalidStateError, "No image can be retrieved from the provided element.");
+        return ScriptPromise();
+    }
+    if (image->cachedImage()->image()->isSVGImage()) {
+        exceptionState.throwDOMException(InvalidStateError, "The image element contains an SVG image, which is unsupported.");
+        return ScriptPromise();
+    }
+    if (!sw || !sh) {
+        exceptionState.throwDOMException(IndexSizeError, String::format("The source %s provided is 0.", sw ? "height" : "width"));
+        return ScriptPromise();
+    }
+    if (!image->cachedImage()->image()->currentFrameHasSingleSecurityOrigin()) {
+        exceptionState.throwSecurityError("The source image contains image data from multiple origins.");
+        return ScriptPromise();
+    }
+    Document* document = eventTarget.toDOMWindow()->document();
+    if (!image->cachedImage()->passesAccessControlCheck(document->securityOrigin()) && document->securityOrigin()->taintsCanvas(image->src())) {
+        exceptionState.throwSecurityError("Cross-origin access to the source image is denied.");
+        return ScriptPromise();
+    }
+    return ImageBitmapSource::fulfillImageBitmap(scriptState, ImageBitmap::create(image, IntRect(sx, sy, sw, sh)));
+}
+
 void HTMLImageElement::selectSourceURL(ImageLoader::UpdateFromElementBehavior behavior)
 {
     if (!document().isActive())
         return;
 
     bool foundURL = false;
     ImageCandidate candidate = findBestFitImageFromPictureParent();
     if (!candidate.isEmpty()) {
         setBestFitURLAndDPRFromImageCandidate(candidate);
         foundURL = true;
@@ skipping 79 matching lines @@
     EventDispatchForbiddenScope::AllowUserAgentEvents allowEvents;
     ensureUserAgentShadowRoot();
 }
 
 bool HTMLImageElement::isOpaque() const
 {
     Image* image = const_cast<HTMLImageElement*>(this)->imageContents();
     return image && image->currentFrameKnownToBeOpaque();
 }
 
+IntSize HTMLImageElement::bitmapSourceSize() const
+{
+    ImageResource* image = cachedImage();
+    if (!image)
+        return IntSize();
+    LayoutSize lSize = image->imageSize(LayoutObject::shouldRespectImageOrientation(layoutObject()), 1.0f);

[davve, 2015/11/27 11:19:43]

Since multiplier is 1 and last argument to imageSize is the default
(IntrinsicSize) the returned size should never be non-integer. Something we may
want to add asserts for here. Makes the truncation on the next line more
obvious. WDYT?

[xidachen, 2015/11/27 19:00:25]

Done.

+    return IntSize(lSize.width(), lSize.height());
 }
+
+}