Change {get,put,create}ImageData() arguments to long

getImageData(), putImageData(), and createImageData() double arguments had undefined behavior and implementation incompatibilities. Reverting them back to long makes it well defined.

Tests: web-platform-tests/wpt#5180.

Fixes #2433.

source

@@ -60164,11 +60164,11 @@ interface <dfn>CanvasDrawImage</dfn> {
 [NoInterfaceObject, Exposed=(Window,Worker)]
 interface <dfn>CanvasImageData</dfn> {
   // <span>pixel manipulation</span>
-  <span>ImageData</span> <span data-x="dom-context-2d-createImageData">createImageData</span>(double sw, double sh);
+  <span>ImageData</span> <span data-x="dom-context-2d-createImageData">createImageData</span>(long sw, long sh);
   <span>ImageData</span> <span data-x="dom-context-2d-createImageData">createImageData</span>(<span>ImageData</span> imagedata);
-  <span>ImageData</span> <span data-x="dom-context-2d-getImageData">getImageData</span>(double sx, double sy, double sw, double sh);
-  void <span data-x="dom-context-2d-putImageData">putImageData</span>(<span>ImageData</span> imagedata, double dx, double dy);
-  void <span data-x="dom-context-2d-putImageData">putImageData</span>(<span>ImageData</span> imagedata, double dx, double dy, double dirtyX, double dirtyY, double dirtyWidth, double dirtyHeight);
+  <span>ImageData</span> <span data-x="dom-context-2d-getImageData">getImageData</span>(long sx, long sy, long sw, long sh);
+  void <span data-x="dom-context-2d-putImageData">putImageData</span>(<span>ImageData</span> imagedata, long dx, long dy);
+  void <span data-x="dom-context-2d-putImageData">putImageData</span>(<span>ImageData</span> imagedata, long dx, long dy, long dirtyX, long dirtyY, long dirtyWidth, long dirtyHeight);
 };
 
 enum <dfn>CanvasLineCap</dfn> { "butt", "round", "square" };
@@ -64452,26 +64452,6 @@ v6DVT (also check for '- -' bits in the part above) -->
 
   </ol>
 
-  <p>The handling of pixel rounding when the specified coordinates are not integers is not defined
-  by this specification, except that the following must result in no visible changes to the
-  rendering:</p>
-
-  <pre>context.putImageData(context.getImageData(x, y, w, h), p, q);</pre>
-
-  <p>...for any value of <var>x</var>, <var>y</var>, <var>w</var>, and
-  <var>h</var> and where <var>p</var> is the smaller of <var>x</var>
-  and the sum of <var>x</var> and <var>w</var>, and <var>q</var> is
-  the smaller of <var>y</var> and the sum of <var>y</var> and <var>h</var>; and except that the following two calls:</p>
-
-  <pre>context.createImageData(w, h);
-context.getImageData(0, 0, w, h);</pre>
-
-  <p>...must return <code>ImageData</code> objects with the same dimensions as each other, for any
-  value of <var>w</var> and <var>h</var>. In other words, while user agents may
-  round the arguments of these methods, any rounding performed must be performed consistently for
-  all of the methods described in this section. (The constructors only work with integer
-  values.)</p>
-
   <p class="note">Due to the lossy nature of converting to and from premultiplied alpha color
   values, pixels that have just been set using <code
   data-x="dom-context-2d-putImageData">putImageData()</code> might be returned to an equivalent
@@ -120003,6 +119983,7 @@ INSERT INTERFACES HERE
   fantasai,
   Felix Sanz,
   Felix Sasaki,
+  Fernando Altomare Serboncini,
   Francesco Schwarz,
   Francis Brosnan Blazquez,
   Franck 'Shift' Qu&eacute;lain,