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authorGravatar Yuqian Li <liyuqian@google.com>2018-01-09 16:27:15 -0500
committerGravatar Skia Commit-Bot <skia-commit-bot@chromium.org>2018-01-10 14:18:39 +0000
commit52f8e71a45ead72f257317f82775eb3459b71eae (patch)
treeaab78d367c0acd9f155e37a2e0da6469f2b28fe3 /src/core
parentcf8626d6917e489d18fbbe38d5887aaa195f5d53 (diff)
Snap alpha for small rects
This is more similar to our alpha snapping in AAA. More critically, we may have a tiny alpha difference after some 90 degree rotations and that breaks the Chromium svg layout tests (where the expected reference is a rotated svg...) TBR: fmalita@google.com Bug: skia: Change-Id: I59b750153488083f65b731643e0baca823cb78e4 Reviewed-on: https://skia-review.googlesource.com/92940 Reviewed-by: Yuqian Li <liyuqian@google.com> Commit-Queue: Yuqian Li <liyuqian@google.com>
Diffstat (limited to 'src/core')
-rw-r--r--src/core/SkBlitter.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/core/SkBlitter.cpp b/src/core/SkBlitter.cpp
index 4bbd80d93f..1f21e28dad 100644
--- a/src/core/SkBlitter.cpp
+++ b/src/core/SkBlitter.cpp
@@ -42,7 +42,8 @@ void SkBlitter::blitAntiH(int x, int y, const SkAlpha antialias[],
*/
inline static SkAlpha ScalarToAlpha(SkScalar a) {
- return (SkAlpha)(a * 255);
+ SkAlpha alpha = (SkAlpha)(a * 255);
+ return alpha > 247 ? 0xFF : alpha < 8 ? 0 : alpha;
}
void SkBlitter::blitFatAntiRect(const SkRect& rect) {