Make SVG images for custom CSS cursors appear sharp on retina displays

Source/core/fetch/ImageResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 Apple 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
@@ skipping 28 matching lines @@
 #include "wtf/StdLibExtras.h"
 #include "wtf/Vector.h"
 
 using namespace std;
 
 namespace WebCore {
 
 ImageResource::ImageResource(const ResourceRequest& resourceRequest)
     : Resource(resourceRequest, Image)
     , m_devicePixelRatioHeaderValue(1.0)
+    , m_deviceScaleFactor(1.0)
     , m_image(0)
     , m_loadingMultipartContent(false)
     , m_hasDevicePixelRatioHeaderValue(false)
 {
     setStatus(Unknown);
     setCustomAcceptHeader();
 }
 
 ImageResource::ImageResource(WebCore::Image* image)
     : Resource(ResourceRequest(""), Image)
@@ skipping 225 matching lines @@
     setAccept(acceptWebP);
 }
 
 inline void ImageResource::createImage()
 {
     // Create the image if it doesn't yet exist.
     if (m_image)
         return;
 
     if (m_response.mimeType() == "image/svg+xml") {
-        RefPtr<SVGImage> svgImage = SVGImage::create(this);
+        RefPtr<SVGImage> svgImage = SVGImage::create(this, m_deviceScaleFactor);
         m_svgImageCache = SVGImageCache::create(svgImage.get());
         m_image = svgImage.release();
     } else {
         m_image = BitmapImage::create(this);
     }
 
     if (m_image) {
         // Send queued container size requests.
         if (m_image->usesContainerSize()) {
             for (ContainerSizeRequests::iterator it = m_pendingContainerSizeRequests.begin(); it != m_pendingContainerSizeRequests.end(); ++it)
@@ skipping 158 matching lines @@
 bool ImageResource::isAccessAllowed(SecurityOrigin* securityOrigin)
 {
     if (!image()->currentFrameHasSingleSecurityOrigin())
         return false;
     if (passesAccessControlCheck(securityOrigin))
         return true;
     return !securityOrigin->taintsCanvas(response().url());
 }
 
 } // namespace WebCore