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disable coverage optimization for hairlines

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The coverage blitter is an optimization of regular blitting to A8.
It can go faster because it never tries to blend with itself... because
it was intended to be called only by fill-path, which is written to
never draw twice in the same place. Hairlines don't make this promise,
so we can use the coverage optimization for hairlines.

Change-Id: I0a4816f886462017ad81378d5928357ef038ae8f
Reviewed-on: https://skia-review.googlesource.com/18666
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
This commit is contained in:
Mike Reed 2017-06-07 13:03:36 -04:00 committed by Skia Commit-Bot
parent 5ab7276a35
commit 65cfb5ecbc
1 changed files with 3 additions and 1 deletions
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4
src/core/SkDraw.h
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@ -84,7 +84,9 @@ public:
*/
void drawPathCoverage(const SkPath& src, const SkPaint& paint,
SkBlitter* customBlitter = NULL) const {
this->drawPath(src, paint, NULL, false, true, customBlitter);
bool isHairline = paint.getStyle() == SkPaint::kStroke_Style &&
paint.getStrokeWidth() > 0;
this->drawPath(src, paint, NULL, false, !isHairline, customBlitter);
}
/** Helper function that creates a mask from a path and an optional maskfilter.