Index: src/core/SkMatrix.cpp |
diff --git a/src/core/SkMatrix.cpp b/src/core/SkMatrix.cpp |
index 71ef24c5e8e13ea9799ca6cf1f996697c96610ab..2f9d1358b907fc61c6c88c4525dc5cf0a593656c 100644 |
--- a/src/core/SkMatrix.cpp |
+++ b/src/core/SkMatrix.cpp |
@@ -1119,6 +1119,28 @@ SkRect SkMatrix::mapRectScaleTranslate(SkRect src) const { |
return dst; |
} |
+SkRect SkMatrix::mapRectScaleTranslate(SkRect src) const { |
+ SkASSERT(this->isScaleTranslate()); |
+ |
+ SkScalar sx = fMat[kMScaleX]; |
+ SkScalar sy = fMat[kMScaleY]; |
+ SkScalar tx = fMat[kMTransX]; |
+ SkScalar ty = fMat[kMTransY]; |
+ Sk4f scale(sx, sy, sx, sy); |
+ Sk4f trans(tx, ty, tx, ty); |
+ |
+ Sk4f ltrb = Sk4f::Load(&src.fLeft) * scale + trans; |
+ // need to sort so we're not inverted |
+ Sk4f rblt(ltrb[2], ltrb[3], ltrb[0], ltrb[1]); |
+ Sk4f min = Sk4f::Min(ltrb, rblt); |
+ Sk4f max = Sk4f::Max(ltrb, rblt); |
+ // We can extract either pair [0,1] or [2,3] from min and max and be correct, but on |
+ // ARM this sequence generates the fastest (a single instruction). |
+ SkRect dst; |
+ Sk4f(min[0], min[1], max[0], max[1]).store(&dst.fLeft); |
+ return dst; |
+} |
+ |
bool SkMatrix::mapRect(SkRect* dst, const SkRect& src) const { |
SkASSERT(dst); |