Preliminary Support for region clipping
Region clipping, using Canvas.clipPath or Canvas.clipRegion, requires
a stencil buffer to be always present. In addition, extra wiring is
required in JNI and display lists.
This change only adds the necessary JNI/C++ APIs and some extra
plumbing to start the real work on properly supporting region
clipping.
A new debug define called DEBUG_CLIP_REGIONS can be used to draw
the current clip region. It is off by default, as is region
clipping.
The default implementation of clipPath() and clipRegion(), now
in native, mimics the previous Dalvik implementation to prevent
regressions.
Change-Id: I7903e7cfd7412b9b9b622566d4dbfce7bdcec00c
diff --git a/libs/hwui/Debug.h b/libs/hwui/Debug.h
index 6795ac3..dfc4e25 100644
--- a/libs/hwui/Debug.h
+++ b/libs/hwui/Debug.h
@@ -35,6 +35,9 @@
// Turn on to enable layers debugging when rendered as regions
#define DEBUG_LAYERS_AS_REGIONS 0
+// Turn on to enable debugging when the clip is not a rect
+#define DEBUG_CLIP_REGIONS 0
+
// Turn on to display debug info about vertex/fragment shaders
#define DEBUG_PROGRAMS 0