Constrain drawBitmap matrix-to-rect optimization

bug:22962165

Optimization is not valid if matrix would flip image.

Change-Id: Ieee42390517bd3466b7d94596f0fbbe192ab757e

1 files changed, 3 insertions, 1 deletions

diff --git a/libs/hwui/DisplayListCanvas.cpp b/libs/hwui/DisplayListCanvas.cpp
index aeb1a3d0ae68..2dd52788074d 100644
--- a/libs/hwui/DisplayListCanvas.cpp
+++ b/libs/hwui/DisplayListCanvas.cpp
@@ -255,7 +255,9 @@ void DisplayListCanvas::drawBitmap(const SkBitmap& bitmap, const SkMatrix& matri
         const SkPaint* paint) {
     if (matrix.isIdentity()) {
         drawBitmap(&bitmap, paint);
-    } else if (!(matrix.getType() & ~(SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask))) {
+    } else if (!(matrix.getType() & ~(SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask))
+            && MathUtils::isPositive(matrix.getScaleX())
+            && MathUtils::isPositive(matrix.getScaleY())) {
         // SkMatrix::isScaleTranslate() not available in L
         SkRect src;
         SkRect dst;