[html5] r1164 - /
whatwg at whatwg.org
whatwg at whatwg.org
Thu Jan 17 17:01:52 PST 2008
Author: ianh
Date: 2008-01-17 17:01:47 -0800 (Thu, 17 Jan 2008)
New Revision: 1164
Modified:
index
source
Log:
[gow] (2) Color spaces and <canvas>
Modified: index
===================================================================
--- index 2008-01-18 00:16:16 UTC (rev 1163)
+++ index 2008-01-18 01:01:47 UTC (rev 1164)
@@ -717,6 +717,9 @@
<li><a href="#drawing"><span class=secno>3.14.11.1.11.
</span>Drawing model</a>
</ul>
+
+ <li><a href="#color"><span class=secno>3.14.11.2. </span>Color
+ spaces and color correction</a>
</ul>
<li><a href="#the-map"><span class=secno>3.14.12. </span>The
@@ -17464,6 +17467,27 @@
<p class="big-issue">Well, one day.</p>
-->
+ <h5 id=color><span class=secno>3.14.11.2. </span>Color spaces and color
+ correction</h5>
+
+ <p>The <code><a href="#canvas">canvas</a></code> APIs must perform colour
+ correction at only two points: when rendering images with their own gamma
+ correction information onto the canvas (e.g. using the <code
+ title=dom-context-2d-drawImage><a href="#drawimage">drawImage()</a></code>
+ method with an <code><a
+ href="#htmlimageelement">HTMLImageElement</a></code> object, to convert
+ the image to the color space used by the canvas), and when rendering the
+ actual canvas bitmap to the output device or to an external resource (e.g.
+ using the <code title=dom-canvas-toDataURL><a
+ href="#todataurl">toDataURL()</a></code> method).
+
+ <p>Thus, colors used to draw shapes onto the canvas will exactly match
+ colors obtained through the <code title=dom-context-2d-getImageData><a
+ href="#getimagedata">getImageData()</a></code> method.
+
+ <p class=big-issue>(is this right?) <!-- XXX --> The canvas must use the
+ sRGB color space. <a href="#refsSRGB">[SRGB]</a>
+
<h4 id=the-map><span class=secno>3.14.12. </span>The <dfn
id=map><code>map</code></dfn> element</h4>
Modified: source
===================================================================
--- source 2008-01-18 00:16:16 UTC (rev 1163)
+++ source 2008-01-18 01:01:47 UTC (rev 1164)
@@ -15052,6 +15052,7 @@
<!-- XXX add xrefs in the list above -->
+
<!--
<h5 id="3d">The 3D context</h5>
@@ -15060,7 +15061,29 @@
+ <h5>Color spaces and color correction</h5>
+ <p>The <code>canvas</code> APIs must perform colour correction at
+ only two points: when rendering images with their own gamma
+ correction information onto the canvas (e.g. using the <code
+ title="dom-context-2d-drawImage">drawImage()</code> method with an
+ <code>HTMLImageElement</code> object, to convert the image to the
+ color space used by the canvas), and when rendering the actual
+ canvas bitmap to the output device or to an external resource
+ (e.g. using the <code
+ title="dom-canvas-toDataURL">toDataURL()</code> method).</p>
+
+ <p>Thus, colors used to draw shapes onto the canvas will exactly
+ match colors obtained through the <code
+ title="dom-context-2d-getImageData">getImageData()</code>
+ method.</p>
+
+ <p class="big-issue">(is this right?) <!-- XXX --> The canvas must
+ use the sRGB color space. <a href="#refsSRGB">[SRGB]</a></p>
+
+
+
+
<h4>The <dfn><code>map</code></dfn> element</h4>
<dl class="element">
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