c84ccb0702
This change updates feSpotLight to match the spec via two changes: 1) specularExponent is ignored if the spotlight has no coneAngle (GPU bug only). This change updates the GPU path so that it matches the CPU path and the spec in this regard. 2) specularExponent is clamped to the 1-128 range. The spec does not specify a clamp for the specularExponent attribute of feSpotLight. Note that the spec *does* specify this clamp for the specularExponent attribute of feSpecularLighting. It looks like we incorrectly applied this to both specularExponent attributes. This change (along with a parallel change in Blink) allows us to pass the SVG filter effects conformance test here: http://www.w3.org/Graphics/SVG/Test/20110816/harness/htmlObject/filters-light-01-f.html Additionally, this brings our behavior in line with Safari and Edge’s behavior on this filter. Two new cases were added to gm/lighting.cpp to catch these issues: - The existing spotlight case exercised the path where our specular exponent was between 1-128 and had a limiting cone angle. - The first new spotlight case exercises the path where our specular exponent is between 1-128 and we do not have a limiting cone angle. - The second new spotlight case exercises the path where the specular exponent is not within the 1-128 range, to ensure that we don’t incorrectly clip to this range. BUG=472849 Review URL: https://codereview.chromium.org/1403403003 |
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Skia is a complete 2D graphic library for drawing Text, Geometries, and Images. See full details, and build instructions, at https://skia.org.