Address dbaron's request for clarification of the no-specified-size case.

<http://lists.w3.org/Archives/Public/www-style/2012Mar/0550.html>

Author: fantasai

css3-images/Overview.html

@@ -1813,24 +1813,12 @@ <h4 id=default-sizing><span class=secno>5.3.1. </span> Default Sizing
    <li>If the <a href="#specified-size"><i>specified size</i></a> has no
     constraints:
     <ol>
-     <li>If the object has only an <a
-      href="#intrinsic-aspect-ratio"><i>intrinsic aspect ratio</i></a>, the
-      <a href="#concrete-object-size"><i>concrete object size</i></a> must
-      have that aspect ratio, and additionally be as large as possible
-      without either its height or width exceeding the height or width of the
-      <a href="#default-object-size"><i>default object size</i></a>.
-      Otherwise, the width and height of the <a
-      href="#concrete-object-size"><i>concrete object size</i></a> is the
-      same as the object's <a href="#intrinsic-width"><i>intrinsic
-      width</i></a> and <a href="#intrinsic-height"><i>intrinsic
-      height</i></a>, if they exist.
-
-     <li>If the <a href="#concrete-object-size"><i>concrete object
-      size</i></a> is still missing a width or height, and the object has an
-      <a href="#intrinsic-aspect-ratio"><i>intrinsic aspect ratio</i></a>,
-      the missing dimension is calculated from the present dimension and the
-      <a href="#intrinsic-aspect-ratio"><i>intrinsic aspect ratio</i></a>.
-      Otherwise, each missing dimension is taken from the <a
+     <li>If the object has an intrinsic height or width, its size is resolved
+      as if its <i>intrinsic size</i> were the <a
+      href="#specified-size"><i>specified size</i></a>.
+
+     <li>Otherwise, its size is resolved as a <a
+      href="#contain-constraint"><i>contain constraint</i></a> against the <a
       href="#default-object-size"><i>default object size</i></a>.
     </ol>
   </ul>

css3-images/Overview.src.html

@@ -1148,9 +1148,11 @@ <h4 id="default-sizing">
 		<li>If the <i>specified size</i> has no constraints:
 
 			<ol>
-				<li>If the object has only an <i>intrinsic aspect ratio</i>, the <i>concrete object size</i> must have that aspect ratio, and additionally be as large as possible without either its height or width exceeding the height or width of the <i>default object size</i>.  Otherwise, the width and height of the <i>concrete object size</i> is the same as the object's <i>intrinsic width</i> and <i>intrinsic height</i>, if they exist.</li>
+				<li>If the object has an intrinsic height or width, its size is resolved
+				as if its <i>intrinsic size</i> were the <i>specified size</i>.
 
-				<li>If the <i>concrete object size</i> is still missing a width or height, and the object has an <i>intrinsic aspect ratio</i>, the missing dimension is calculated from the present dimension and the <i>intrinsic aspect ratio</i>. Otherwise, each missing dimension is taken from the <i>default object size</i>.</li>
+				<li>Otherwise, its size is resolved as a <i>contain constraint</i>
+				against the <i>default object size</i>.</li>
 			</ol>
 		</li>
 	</ul>