14326 2011-09-28 14:48:15 +0000 2d.imageData.object.round should be updated 2012-03-05 17:44:08 +0000 1 1 1 Unclassified HTML WG testsuite unspecified All All RESOLVED FIXED P2 normal --- 1 Ms2ger Ms2ger excors mike public-html-wg-issue-tracking qkmiao public-html-bugzilla oldest_to_newest 57479 0 Ms2ger 2011-09-28 14:48:15 +0000 2d.imageData.object.round should test for "Round x to the nearest integer, choosing the even integer if it lies halfway between two." as changed in <http://dev.w3.org/cvsweb/2006/webapi/WebIDL/Overview.html.diff?r1=1.393;r2=1.394;f=h> 57631 1 Ms2ger 2011-10-02 15:12:38 +0000 http://dvcs.w3.org/hg/html/rev/1d201654fce1 Please review. 65008 2 qkmiao 2012-03-05 05:30:09 +0000 As defined in latest spec (Editor's Draft 29 February 2012) at http://dev.w3.org/html5/2dcontext/#imagedata, the data of imagedata is initialized to a Uint8ClampedArray object which maps to a octet type in Web IDL. According to the mapping rule defined at http://dev.w3.org/2006/webapi/WebIDL/#es-octet, an attribute annotated with the [Clamp] extended attribute should handle as follows: 1. Round x to the nearest integer, choosing the even integer if it lies halfway between two. 2. Set x to min(max(x, 0), 2^8 − 1). 3. Return the IDL octet value that represents the same numeric value as x. e.g. 0.499 -> 0 0.5 -> 0 0.501 -> 1 1.499 -> 1 1.5 -> 2 1.501 -> 2 2.5 -> 2 3.5 -> 4 252.5 -> 252 253.5 -> 254 254.5 -> 254 256.5 -> 255 -0.5 -> 0 -1.5 -> 0 So this test should be updated. 65025 3 Ms2ger 2012-03-05 17:44:08 +0000 Thanks, I've updated the approved version. http://dvcs.w3.org/hg/html/rev/c3f2f7da0bfb