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implement dithering for vertical grads (was a todo:)

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git-svn-id: http://skia.googlecode.com/svn/trunk@2960 2bbb7eff-a529-9590-31e7-b0007b416f81
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reed@google.com 2012-01-04 17:26:27 +00:00
parent 9330cfe851
commit 998343a134
1 changed files with 3 additions and 4 deletions
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7
src/effects/SkGradientShader.cpp
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@ -880,10 +880,9 @@ void Linear_Gradient::shadeSpan(int x, int y, SkPMColor* SK_RESTRICT dstC, int c
if (SkFixedNearlyZero(dx)) {
// we're a vertical gradient, so no change in a span
unsigned fi = proc(fx);
SkASSERT(fi <= 0xFFFF);
// TODO: dither version
sk_memset32(dstC, cache[fi >> (16 - kCache32Bits)], count);
unsigned fi = proc(fx) >> (16 - kCache32Bits);
sk_memset32_dither(dstC, cache[toggle + fi],
cache[(toggle ^ TOGGLE_MASK) + fi], count);
} else if (proc == clamp_tileproc) {
SkClampRange range;
range.init(fx, dx, count, 0, 0xFF);