[css-shapes] change initial value of shape-image-threshold to 0.0

Author: astearns

css-shapes/Overview.html

@@ -616,7 +616,7 @@ <h3 id=shapes-from-image><span class=secno>3.3. </span>Shapes from Image</h3>
    class=property>shape-image-threshold</code></a>’ value. If the ‘<a
    href="#shape-image-threshold"><code
    class=property>shape-image-threshold</code></a>’ is not specified, the
-   initial value to be considered is 0.5.
+   initial value to be considered is 0.0.
 
   <p>For animated raster image formats (such as <a
    href="http://www.w3.org/Graphics/GIF/spec-gif89a.txt">GIF</a>), the first
@@ -799,8 +799,8 @@ <h4 id=shape-image-threshold-property><span class=secno>3.4.2. </span>The
   <p> The ‘<a href="#shape-image-threshold"><code
    class=property>shape-image-threshold</code></a>’ defines the alpha
    channel threshold used to extract the shape using an image. A value of 0.5
-   means that all the pixels that are more than 50% transparent define the
-   path of the shape.
+   means that the shape will enclose all the pixels that are more than 50%
+   opaque.
 
   <table class=propdef>
    <tbody>
@@ -818,7 +818,7 @@ <h4 id=shape-image-threshold-property><span class=secno>3.4.2. </span>The
     <tr>
      <th>Initial:
 
-     <td>0.5
+     <td>0.0
 
     <tr>
      <th>Applies to:
@@ -1209,7 +1209,7 @@ <h2 class=no-num id=property-index>Property index</h2>
 
      <td>&lt;alphavalue&gt;
 
-     <td>0.5
+     <td>0.0
 
      <td>floats
 
@@ -1275,6 +1275,8 @@ <h3 class=no-num id=since-june-20th-2013>Since <a
    2013</a></h3>
 
   <ul>
+   <li>Change initial value of shape-image-threshold to 0.0
+
    <li>Change float positioning to be unaffected by shape-outside
 
    <li>Shapes on floats clipped to float's margin box

css-shapes/Overview.src.html

@@ -514,7 +514,7 @@ <h3 id="shapes-from-image">Shapes from Image</h3>
           where the opacity of the specified image 
           is greater than the 'shape-image-threshold' value. 
           If the 'shape-image-threshold' is not specified, 
-          the initial value to be considered is 0.5.
+          the initial value to be considered is 0.0.
       </p>
 
       <p>For animated raster image formats 
@@ -660,9 +660,14 @@ <h4 id="shape-outside-property">The 'shape-outside' Property</h4>
    <h4 id="shape-image-threshold-property">The 'shape-image-threshold' Property</h4>
 
     <p>
-        The 'shape-image-threshold' defines the alpha channel threshold used to extract
-        the shape using an image. A value of 0.5 means that all the pixels that are more
-        than 50% transparent define the path of the shape.
+        The 'shape-image-threshold' 
+        defines the alpha channel threshold 
+        used to extract the shape 
+        using an image. 
+        A value of 0.5 means that 
+        the shape will enclose 
+        all the pixels 
+        that are more than 50% opaque.
     </p>
 
     <table class="propdef">
@@ -676,7 +681,7 @@ <h4 id="shape-image-threshold-property">The 'shape-image-threshold' Property</h4
         </tr>
         <tr>
             <th>Initial:</th>
-            <td>0.5</td>
+            <td>0.0</td>
         </tr>
         <tr>
             <th>Applies to:</th>
@@ -822,6 +827,7 @@ <h2 class="no-num" id="change-log">Change Log</h2>
 
       <h3 class="no-num" >Since <a href="http://www.w3.org/TR/2013/WD-css-shapes-1-20130620/">June 20th 2013</a></h3>
       <ul>
+          <li>Change initial value of shape-image-threshold to 0.0</li>
           <li>Change float positioning to be unaffected by shape-outside</li>
           <li>Shapes on floats clipped to float's margin box</li>
           <li>Inline content constrained to at least the float's farthest margin edge</li>