<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>[195415] trunk/Source/WebCore</title>
</head>
<body>
<style type="text/css"><!--
#msg dl.meta { border: 1px #006 solid; background: #369; padding: 6px; color: #fff; }
#msg dl.meta dt { float: left; width: 6em; font-weight: bold; }
#msg dt:after { content:':';}
#msg dl, #msg dt, #msg ul, #msg li, #header, #footer, #logmsg { font-family: verdana,arial,helvetica,sans-serif; font-size: 10pt; }
#msg dl a { font-weight: bold}
#msg dl a:link { color:#fc3; }
#msg dl a:active { color:#ff0; }
#msg dl a:visited { color:#cc6; }
h3 { font-family: verdana,arial,helvetica,sans-serif; font-size: 10pt; font-weight: bold; }
#msg pre { overflow: auto; background: #ffc; border: 1px #fa0 solid; padding: 6px; }
#logmsg { background: #ffc; border: 1px #fa0 solid; padding: 1em 1em 0 1em; }
#logmsg p, #logmsg pre, #logmsg blockquote { margin: 0 0 1em 0; }
#logmsg p, #logmsg li, #logmsg dt, #logmsg dd { line-height: 14pt; }
#logmsg h1, #logmsg h2, #logmsg h3, #logmsg h4, #logmsg h5, #logmsg h6 { margin: .5em 0; }
#logmsg h1:first-child, #logmsg h2:first-child, #logmsg h3:first-child, #logmsg h4:first-child, #logmsg h5:first-child, #logmsg h6:first-child { margin-top: 0; }
#logmsg ul, #logmsg ol { padding: 0; list-style-position: inside; margin: 0 0 0 1em; }
#logmsg ul { text-indent: -1em; padding-left: 1em; }#logmsg ol { text-indent: -1.5em; padding-left: 1.5em; }
#logmsg > ul, #logmsg > ol { margin: 0 0 1em 0; }
#logmsg pre { background: #eee; padding: 1em; }
#logmsg blockquote { border: 1px solid #fa0; border-left-width: 10px; padding: 1em 1em 0 1em; background: white;}
#logmsg dl { margin: 0; }
#logmsg dt { font-weight: bold; }
#logmsg dd { margin: 0; padding: 0 0 0.5em 0; }
#logmsg dd:before { content:'\00bb';}
#logmsg table { border-spacing: 0px; border-collapse: collapse; border-top: 4px solid #fa0; border-bottom: 1px solid #fa0; background: #fff; }
#logmsg table th { text-align: left; font-weight: normal; padding: 0.2em 0.5em; border-top: 1px dotted #fa0; }
#logmsg table td { text-align: right; border-top: 1px dotted #fa0; padding: 0.2em 0.5em; }
#logmsg table thead th { text-align: center; border-bottom: 1px solid #fa0; }
#logmsg table th.Corner { text-align: left; }
#logmsg hr { border: none 0; border-top: 2px dashed #fa0; height: 1px; }
#header, #footer { color: #fff; background: #636; border: 1px #300 solid; padding: 6px; }
#patch { width: 100%; }
#patch h4 {font-family: verdana,arial,helvetica,sans-serif;font-size:10pt;padding:8px;background:#369;color:#fff;margin:0;}
#patch .propset h4, #patch .binary h4 {margin:0;}
#patch pre {padding:0;line-height:1.2em;margin:0;}
#patch .diff {width:100%;background:#eee;padding: 0 0 10px 0;overflow:auto;}
#patch .propset .diff, #patch .binary .diff {padding:10px 0;}
#patch span {display:block;padding:0 10px;}
#patch .modfile, #patch .addfile, #patch .delfile, #patch .propset, #patch .binary, #patch .copfile {border:1px solid #ccc;margin:10px 0;}
#patch ins {background:#dfd;text-decoration:none;display:block;padding:0 10px;}
#patch del {background:#fdd;text-decoration:none;display:block;padding:0 10px;}
#patch .lines, .info {color:#888;background:#fff;}
--></style>
<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/195415">195415</a></dd>
<dt>Author</dt> <dd>simon.fraser@apple.com</dd>
<dt>Date</dt> <dd>2016-01-21 11:00:33 -0800 (Thu, 21 Jan 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>GraphicsContext: low quality drawImage and drawImageBuffer should use InterpolationLow
https://bugs.webkit.org/show_bug.cgi?id=49002
Reviewed by Chris Dumez.
When using low quality image scaling for images which are getting painted often,
the code used InterpolationNone, which make the images look even worse than they should.
Not easily testable.
* platform/graphics/GraphicsContext.cpp:
(WebCore::GraphicsContext::drawImage):
(WebCore::GraphicsContext::drawImageBuffer):
(WebCore::GraphicsContext::drawConsumingImageBuffer):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsGraphicsContextcpp">trunk/Source/WebCore/platform/graphics/GraphicsContext.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (195414 => 195415)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2016-01-21 18:58:11 UTC (rev 195414)
+++ trunk/Source/WebCore/ChangeLog        2016-01-21 19:00:33 UTC (rev 195415)
</span><span class="lines">@@ -1,3 +1,20 @@
</span><ins>+2016-01-21 Simon Fraser <simon.fraser@apple.com>
+
+ GraphicsContext: low quality drawImage and drawImageBuffer should use InterpolationLow
+ https://bugs.webkit.org/show_bug.cgi?id=49002
+
+ Reviewed by Chris Dumez.
+
+ When using low quality image scaling for images which are getting painted often,
+ the code used InterpolationNone, which make the images look even worse than they should.
+
+ Not easily testable.
+
+ * platform/graphics/GraphicsContext.cpp:
+ (WebCore::GraphicsContext::drawImage):
+ (WebCore::GraphicsContext::drawImageBuffer):
+ (WebCore::GraphicsContext::drawConsumingImageBuffer):
+
</ins><span class="cx"> 2016-01-19 Ada Chan <adachan@apple.com>
</span><span class="cx">
</span><span class="cx"> Make it possible to enable VIDEO_PRESENTATION_MODE on other Cocoa platforms.
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsGraphicsContextcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/GraphicsContext.cpp (195414 => 195415)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/GraphicsContext.cpp        2016-01-21 18:58:11 UTC (rev 195414)
+++ trunk/Source/WebCore/platform/graphics/GraphicsContext.cpp        2016-01-21 19:00:33 UTC (rev 195415)
</span><span class="lines">@@ -767,8 +767,7 @@
</span><span class="cx"> return;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- // FIXME (49002): Should be InterpolationLow
- InterpolationQualityMaintainer interpolationQualityForThisScope(*this, imagePaintingOptions.m_useLowQualityScale ? InterpolationNone : imageInterpolationQuality());
</del><ins>+ InterpolationQualityMaintainer interpolationQualityForThisScope(*this, imagePaintingOptions.m_useLowQualityScale ? InterpolationLow : imageInterpolationQuality());
</ins><span class="cx"> image.draw(*this, destination, source, imagePaintingOptions.m_compositeOperator, imagePaintingOptions.m_blendMode, imagePaintingOptions.m_orientationDescription);
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -822,8 +821,7 @@
</span><span class="cx"> if (paintingDisabled())
</span><span class="cx"> return;
</span><span class="cx">
</span><del>- // FIXME (49002): Should be InterpolationLow
- InterpolationQualityMaintainer interpolationQualityForThisScope(*this, imagePaintingOptions.m_useLowQualityScale ? InterpolationNone : imageInterpolationQuality());
</del><ins>+ InterpolationQualityMaintainer interpolationQualityForThisScope(*this, imagePaintingOptions.m_useLowQualityScale ? InterpolationLow : imageInterpolationQuality());
</ins><span class="cx"> image.draw(*this, destination, source, imagePaintingOptions.m_compositeOperator, imagePaintingOptions.m_blendMode, imagePaintingOptions.m_useLowQualityScale);
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -848,8 +846,7 @@
</span><span class="cx"> if (paintingDisabled() || !image)
</span><span class="cx"> return;
</span><span class="cx">
</span><del>- // FIXME (49002): Should be InterpolationLow
- InterpolationQualityMaintainer interpolationQualityForThisScope(*this, imagePaintingOptions.m_useLowQualityScale ? InterpolationNone : imageInterpolationQuality());
</del><ins>+ InterpolationQualityMaintainer interpolationQualityForThisScope(*this, imagePaintingOptions.m_useLowQualityScale ? InterpolationLow : imageInterpolationQuality());
</ins><span class="cx">
</span><span class="cx"> ImageBuffer::drawConsuming(WTFMove(image), *this, destination, source, imagePaintingOptions.m_compositeOperator, imagePaintingOptions.m_blendMode, imagePaintingOptions.m_useLowQualityScale);
</span><span class="cx"> }
</span></span></pre>
</div>
</div>
</body>
</html>