BLI_bitmap: add flip macro

2016-02-13 17:47:38 +11:00 · 2016-02-13 17:47:38 +11:00 · 12b996e61b
parent c9ef3d1f69
commit 12b996e61b
1 changed files with 6 additions and 0 deletions
--- a/source/blender/blenlib/BLI_bitmap.h
+++ b/source/blender/blenlib/BLI_bitmap.h
@ -86,6 +86,12 @@ typedef unsigned int BLI_bitmap;
 	 ((_bitmap)[(_index) >> _BITMAP_POWER] &= \
 	  ~(1u << ((_index) & _BITMAP_MASK))))

+/* flip the value of a single bit at '_index' */
+#define BLI_BITMAP_FLIP(_bitmap, _index) \
+	(CHECK_TYPE_ANY(_bitmap, BLI_bitmap *, const BLI_bitmap *), \
+	 ((_bitmap)[(_index) >> _BITMAP_POWER] ^= \
+	  (1u << ((_index) & _BITMAP_MASK))))
+
 /* set or clear the value of a single bit at '_index' */
 #define BLI_BITMAP_SET(_bitmap, _index, _set) \
 	{ \