139414 2014-12-08 14:51:38 -0800 Small rounding error in SVG color transformation 2014-12-08 14:52:56 -0800 1 1 1 Unclassified WebKit SVG 528+ (Nightly build) Unspecified Unspecified NEW InRadar P2 Normal --- 1 sabouhallawa webkit-unassigned webkit-bug-importer zimmermann oldest_to_newest 1053529 0 242848 sabouhallawa 2014-12-08 14:51:38 -0800 Created attachment 242848 Test case Open the attached test case and compare it with the expected file. Result: With naked eyes, the two will look very similar. But if a comparison tool is used, the result will be they are different. Expected: The test case and the expected file should exactly the same. The test case has the following filter effect: <feColorMatrix type="matrix" values="0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0.5 0" ...> This filter effect is applied to the following target element: <rect x="0" y="0" width="100" height="100" fill="#123456" filter="url(#f1)"/> The resulting color should be equal to: r=0x34, g=0x56, b=0x12 and alpha=0.5 The expected file has only the following element: <rect x="10" y="10" width="80" height="80" fill="#345612" fill-opacity="0.5"/> With closer look at the test case, one can see a difference of 1/256 in every color component when it is compared with the expected file. NOTE: We may end up not fixing this bug. But we need to investigate to understand where the rounding happens. And based on this investigation we will decided if it is worthy fixing or not. NOTE: The attached test case is imported from Mozilla SVG test suite. 1053530 1 242849 sabouhallawa 2014-12-08 14:52:05 -0800 Created attachment 242849 Expected file 1053531 2 webkit-bug-importer 2014-12-08 14:52:56 -0800 <rdar://problem/19182146> 242848 2014-12-08 14:51:38 -0800 2014-12-08 14:51:38 -0800 Test case feColorMatrix-1.svg image/svg+xml 448 sabouhallawa PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPgoKPGZpbHRlciBpZD0iZjEi IGZpbHRlclVuaXRzPSJvYmplY3RCb3VuZGluZ0JveCIgcHJpbWl0aXZlVW5pdHM9Im9iamVjdEJv dW5kaW5nQm94IiAKICAgICAgICAgeD0iMCUiIHk9IjAlIiB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIx MDAlIj4KICA8ZmVDb2xvck1hdHJpeCB0eXBlPSJtYXRyaXgiIHZhbHVlcz0iMCAxIDAgMCAwICAg MCAwIDEgMCAwICAgMSAwIDAgMCAwICAgMCAwIDAgMC41IDAiCiAgIHg9IjEwJSIgeT0iMTAlIiB3 aWR0aD0iODAlIiBoZWlnaHQ9IjgwJSIgc3R5bGU9ImNvbG9yLWludGVycG9sYXRpb24tZmlsdGVy czpzUkdCIi8+CjwvZmlsdGVyPgo8cmVjdCB4PSIwIiB5PSIwIiB3aWR0aD0iMTAwIiBoZWlnaHQ9 IjEwMCIgZmlsbD0iIzEyMzQ1NiIgZmlsdGVyPSJ1cmwoI2YxKSIvPgoKPC9zdmc+Cg== 242849 2014-12-08 14:52:05 -0800 2014-12-08 14:52:05 -0800 Expected file feColorMatrix-1-expected.svg image/svg+xml 129 sabouhallawa PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPgoKPHJlY3QgeD0iMTAiIHk9 IjEwIiB3aWR0aD0iODAiIGhlaWdodD0iODAiIGZpbGw9IiMzNDU2MTIiIGZpbGwtb3BhY2l0eT0i MC41Ii8+Cgo8L3N2Zz4K