diff options
Diffstat (limited to 'src/gpu/effects/GrDitherEffect.fp')
| -rw-r--r-- | src/gpu/effects/GrDitherEffect.fp | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/gpu/effects/GrDitherEffect.fp b/src/gpu/effects/GrDitherEffect.fp index fe641c6132..f2d54cf2eb 100644 --- a/src/gpu/effects/GrDitherEffect.fp +++ b/src/gpu/effects/GrDitherEffect.fp @@ -32,8 +32,8 @@ layout(key) in int rangeType; } void main() { - float value; - float range; + half value; + half range; @switch (rangeType) { case 0: range = 1.0 / 255.0; @@ -53,17 +53,17 @@ void main() { uint m = (y & 1) << 5 | (x & 1) << 4 | (y & 2) << 2 | (x & 2) << 1 | (y & 4) >> 1 | (x & 4) >> 2; - value = float(m) * 1.0 / 64.0 - 63.0 / 128.0; + value = half(m) * 1.0 / 64.0 - 63.0 / 128.0; } else { // Simulate the integer effect used above using step/mod. For speed, simulates a 4x4 // dither pattern rather than an 8x8 one. - float4 modValues = mod(sk_FragCoord.xyxy, float4(2.0, 2.0, 4.0, 4.0)); - float4 stepValues = step(modValues, float4(1.0, 1.0, 2.0, 2.0)); - value = dot(stepValues, float4(8.0 / 16.0, 4.0 / 16.0, 2.0 / 16.0, 1.0 / 16.0)) - 15.0 / 32.0; + half4 modValues = mod(sk_FragCoord.xyxy, half4(2.0, 2.0, 4.0, 4.0)); + half4 stepValues = step(modValues, half4(1.0, 1.0, 2.0, 2.0)); + value = dot(stepValues, half4(8.0 / 16.0, 4.0 / 16.0, 2.0 / 16.0, 1.0 / 16.0)) - 15.0 / 32.0; } // For each color channel, add the random offset to the channel value and then clamp // between 0 and alpha to keep the color premultiplied. - sk_OutColor = float4(clamp(sk_InColor.rgb + value * range, 0, sk_InColor.a), sk_InColor.a); + sk_OutColor = half4(clamp(sk_InColor.rgb + value * range, 0, sk_InColor.a), sk_InColor.a); } @test(testData) { |