implement dithering for vertical grads (was a todo:)
git-svn-id: http://skia.googlecode.com/svn/trunk@2960 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkGradientShader.cpp b/src/effects/SkGradientShader.cpp
index 1e1add2..459bd53 100644
--- a/src/effects/SkGradientShader.cpp
+++ b/src/effects/SkGradientShader.cpp
@@ -880,10 +880,9 @@
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);