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Bug 1853573 - Implement vec2_scalar fract() in swgl. r=gfx-reviewers,lsalzman

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Differential Revision: https://phabricator.services.mozilla.com/D188818
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Jamie Nicol 2023-09-21 14:30:12 +00:00
parent c52cbf9d05
commit 0694aeb5d3
1 changed files with 2 additions and 0 deletions
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gfx/wr/swgl/src/glsl.h
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@ -753,6 +753,8 @@ Float fract(Float v) { return v - floor(v); }
vec2 fract(vec2 v) { return vec2(fract(v.x), fract(v.y)); }
vec2_scalar fract(vec2_scalar v) { return vec2_scalar(fract(v.x), fract(v.y)); }
// X derivatives can be approximated by dFdx(x) = x[1] - x[0].
// Y derivatives are not easily available since we operate in terms of X spans
// only. To work around, assume dFdy(p.x) = dFdx(p.y), which only holds for