Docs updates.
Change-Id: Iff395e1c6d81a484a2c4ad6e88357c0134971b78
diff --git a/libs/hwui/Snapshot.h b/libs/hwui/Snapshot.h
index ebedf53..062c986 100644
--- a/libs/hwui/Snapshot.h
+++ b/libs/hwui/Snapshot.h
@@ -116,6 +116,11 @@
bool clipTransformed(const Rect& r, SkRegion::Op op = SkRegion::kIntersect_Op) {
bool clipped = false;
+ // NOTE: The unimplemented operations require support for regions
+ // Supporting regions would require using a stencil buffer instead
+ // of the scissor. The stencil buffer itself is not too expensive
+ // (memory cost excluded) but on fillrate limited devices, managing
+ // the stencil might have a negative impact on the framerate.
switch (op) {
case SkRegion::kDifference_Op:
break;