Merge "Support alpha for SurfaceView"

1 files changed, 5 insertions, 3 deletions

diff --git a/libs/hwui/SkiaCanvas.cpp b/libs/hwui/SkiaCanvas.cpp
index 397975dcb78f..473afbd2aa2f 100644
--- a/libs/hwui/SkiaCanvas.cpp
+++ b/libs/hwui/SkiaCanvas.cpp
@@ -18,6 +18,7 @@
 
 #include "CanvasProperty.h"
 #include "NinePatchUtils.h"
+#include "SkBlendMode.h"
 #include "VectorDrawable.h"
 #include "hwui/Bitmap.h"
 #include "hwui/MinikinUtils.h"
@@ -251,10 +252,11 @@ const SkiaCanvas::SaveRec* SkiaCanvas::currentSaveRec() const {
     return (rec && rec->saveCount == currentSaveCount) ? rec : nullptr;
 }
 
-void SkiaCanvas::punchHole(const SkRRect& rect) {
+void SkiaCanvas::punchHole(const SkRRect& rect, float alpha) {
     SkPaint paint = SkPaint();
-    paint.setColor(0);
-    paint.setBlendMode(SkBlendMode::kClear);
+    paint.setColor(SkColors::kBlack);
+    paint.setAlphaf(alpha);
+    paint.setBlendMode(SkBlendMode::kDstOut);
     mCanvas->drawRRect(rect, paint);
 }