Correctly adjust clip regions that lie offscreen
We were clamping the x/y location of the scissor to 0,0, but not adjusting
the width/height appropriately. This fix adjusts width/height and also clamps
them to 0 to correctly clip out offscreen operations.
Issue #7221524 Top left and top right portions of the screen blanks out after some time
Change-Id: I47f23336ea612409ed86652b9a68e272819ef00e
diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index d18a5b0..e7085b0 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -399,9 +399,20 @@
if (scissorEnabled && (x != mScissorX || y != mScissorY ||
width != mScissorWidth || height != mScissorHeight)) {
- if (x < 0) x = 0;
- if (y < 0) y = 0;
-
+ if (x < 0) {
+ width += x;
+ x = 0;
+ }
+ if (y < 0) {
+ height += y;
+ y = 0;
+ }
+ if (width < 0) {
+ width = 0;
+ }
+ if (height < 0) {
+ height = 0;
+ }
glScissor(x, y, width, height);
mScissorX = x;