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- fix up a bit of math on the dither shader

This commit is contained in:
Rachael Alexanderson 2018-08-06 21:37:45 -04:00
parent 7362070504
commit cdd77ad5fa
1 changed files with 5 additions and 4 deletions
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9
wadsrc/static/shaders/glsl/present.fp
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@ -17,11 +17,12 @@ vec4 ApplyGamma(vec4 c)
return vec4(val, c.a);
}
float halfstep = 15./32.;
float DitherMatrix[16] = float[](
0.0 / 16.0 - 0.5, 8.0 / 16.0 - 0.5, 2.0 / 16.0 - 0.5, 10.0 / 16.0 - 0.5,
12.0 / 16.0 - 0.5, 4.0 / 16.0 - 0.5, 14.0 / 16.0 - 0.5, 6.0 / 16.0 - 0.5,
3.0 / 16.0 - 0.5, 11.0 / 16.0 - 0.5, 1.0 / 16.0 - 0.5, 9.0 / 16.0 - 0.5,
15.0 / 16.0 - 0.5, 7.0 / 16.0 - 0.5, 13.0 / 16.0 - 0.5, 5.0 / 16.0 - 0.5
0.0 / 16.0 - halfstep, 8.0 / 16.0 - halfstep, 2.0 / 16.0 - halfstep, 10.0 / 16.0 - halfstep,
12.0 / 16.0 - halfstep, 4.0 / 16.0 - halfstep, 14.0 / 16.0 - halfstep, 6.0 / 16.0 - halfstep,
3.0 / 16.0 - halfstep, 11.0 / 16.0 - halfstep, 1.0 / 16.0 - halfstep, 9.0 / 16.0 - halfstep,
15.0 / 16.0 - halfstep, 7.0 / 16.0 - halfstep, 13.0 / 16.0 - halfstep, 5.0 / 16.0 - halfstep
);
vec4 Dither(vec4 c, float colorscale)