Fix vector image sizing to be more precise for border-image slicing.

Author: fantasai

css3-background/Overview.html

@@ -22,13 +22,13 @@
 
    <h1>CSS Backgrounds and Borders Module Level 3</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 17 January
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 18 January
     2012</h2>
 
    <dl>
     <dt>This version:
 
-    <dd><!-- <a href="http://www.w3.org/TR/2012/CR-css3-background-20120117">http://www.w3.org/TR/2012/ED-css3-background-20120117/</a> -->
+    <dd><!-- <a href="http://www.w3.org/TR/2012/CR-css3-background-20120118">http://www.w3.org/TR/2012/ED-css3-background-20120118/</a> -->
      <a
      href="http://dev.w3.org/csswg/css3-background">http://dev.w3.org/csswg/css3-background</a>
 
@@ -3210,10 +3210,7 @@ <h3 id=the-border-image-slice><span class=secno>5.2. </span>The &lsquo;<a
    <dt><var>&lt;number&gt;</var>
 
    <dd>Numbers represent pixels in the image (if the image is a raster image)
-    or vector coordinates (if the image is a vector image). If the image must
-    be sized to determine the slices (for example, for SVG images with no
-    intrinsic size), then it is sized to the <a
-    href="#border-image-area"><i>border image area</i></a>.
+    or vector coordinates (if the image is a vector image).
 
    <dt><dfn id=border-image-slice-fill>&lsquo;<code
     class=css>fill</code>&rsquo;</dfn>
@@ -3234,6 +3231,13 @@ <h3 id=the-border-image-slice><span class=secno>5.2. </span>The &lsquo;<a
    transparent image had been specified for those parts. Analogously for the
    top and bottom values.
 
+  <p>If the image must be sized to determine the slices (for example, for SVG
+   images with no intrinsic size), then it is sized as for an auto-sized
+   background, using the <a href="#border-image-area"><i>border image
+   area</i></a> as the <i>default object size</i> in place of the <a
+   href="#background-positioning-area"><i>background positioning
+   area</i></a>.
+
   <p class=issue><a
    href="http://www.w3.org/Style/CSS/Tracker/issues/208">ISSUE-208</a>
    proposed text: If the image is an SVG image, the aspect ratio is not

css3-background/Overview.src.html

@@ -2328,10 +2328,7 @@ <h3 id="the-border-image-slice">The 'border-image-slice' property</h3>
 
   <dt><var>&lt;number&gt;</var>
   <dd>Numbers represent pixels in the image (if the image is a raster
-    image) or vector coordinates (if the image is a vector image). If
-    the image must be sized to determine the slices (for example, for
-    SVG images with no intrinsic size), then it is sized to the
-    <i>border image area</i>.
+    image) or vector coordinates (if the image is a vector image).
 
   <dt><dfn id="border-image-slice-fill">''fill''</dfn>
   <dd>The ''fill'' keyword, if present, causes the middle part of
@@ -2349,6 +2346,12 @@ <h3 id="the-border-image-slice">The 'border-image-slice' property</h3>
 as if a nonempty transparent image had been specified for those
 parts. Analogously for the top and bottom values.
 
+<p>If the image must be sized to determine the slices (for example,
+for SVG images with no intrinsic size), then it is sized as for an
+auto-sized background, using the <i>border image area</i> as the
+<i>default object size</i> in place of the <i>background positioning
+area</i>.
+
 <p class=issue><a
 href="http://www.w3.org/Style/CSS/Tracker/issues/208" >ISSUE-208</a>
 proposed text: If the image is an SVG image, the aspect ratio is not