Add a render buffer cache to reuse stencil buffers
Bug #7146141
This new cache is used in a similar way to LayerCache. It helps
reuse already allocated stencil buffers and thus avoid churning
memory on every frame.
Change-Id: I19551d72da52c40039e65904563600e492c8b193
diff --git a/libs/hwui/Properties.h b/libs/hwui/Properties.h
index 1e8765b..0c75242 100644
--- a/libs/hwui/Properties.h
+++ b/libs/hwui/Properties.h
@@ -34,9 +34,9 @@
// Textures used by layers must have dimensions multiples of this number
#define LAYER_SIZE 64
-// Defines the size in bits of the stencil buffer
+// Defines the size in bits of the stencil buffer for the framebuffer
// Note: Only 1 bit is required for clipping but more bits are required
-// to properly implement the winding fill rule when rasterizing paths
+// to properly implement overdraw debugging
#define STENCIL_BUFFER_SIZE 8
/**
@@ -85,6 +85,7 @@
// These properties are defined in mega-bytes
#define PROPERTY_TEXTURE_CACHE_SIZE "ro.hwui.texture_cache_size"
#define PROPERTY_LAYER_CACHE_SIZE "ro.hwui.layer_cache_size"
+#define PROPERTY_RENDER_BUFFER_CACHE_SIZE "ro.hwui.r_buffer_cache_size"
#define PROPERTY_GRADIENT_CACHE_SIZE "ro.hwui.gradient_cache_size"
#define PROPERTY_PATH_CACHE_SIZE "ro.hwui.path_cache_size"
#define PROPERTY_SHAPE_CACHE_SIZE "ro.hwui.shape_cache_size"
@@ -130,6 +131,7 @@
#define DEFAULT_TEXTURE_CACHE_SIZE 24.0f
#define DEFAULT_LAYER_CACHE_SIZE 16.0f
+#define DEFAULT_RENDER_BUFFER_CACHE_SIZE 2.0f
#define DEFAULT_PATH_CACHE_SIZE 4.0f
#define DEFAULT_SHAPE_CACHE_SIZE 1.0f
#define DEFAULT_PATCH_CACHE_SIZE 512