diff options
Diffstat (limited to 'source/blender/blenlib/BLI_bitmap.h')
| -rw-r--r-- | source/blender/blenlib/BLI_bitmap.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/source/blender/blenlib/BLI_bitmap.h b/source/blender/blenlib/BLI_bitmap.h index 19d8525311c..973cc5c3d1e 100644 --- a/source/blender/blenlib/BLI_bitmap.h +++ b/source/blender/blenlib/BLI_bitmap.h @@ -27,7 +27,7 @@ typedef unsigned int BLI_bitmap; /** * Number of blocks needed to hold '_num' bits. */ -#define _BITMAP_NUM_BLOCKS(_num) (((_num) >> _BITMAP_POWER) + 1) +#define _BITMAP_NUM_BLOCKS(_num) (((_num) + _BITMAP_MASK) >> _BITMAP_POWER) /** * Size (in bytes) used to hold '_num' bits. @@ -54,6 +54,11 @@ typedef unsigned int BLI_bitmap; ((BLI_bitmap *)BLI_memarena_calloc(_mem, BLI_BITMAP_SIZE(_num)))) /** + * Declares a bitmap as a variable. + */ +#define BLI_BITMAP_DECLARE(_name, _num) BLI_bitmap _name[_BITMAP_NUM_BLOCKS(_num)] = {} + +/** * Get the value of a single bit at '_index'. */ #define BLI_BITMAP_TEST(_bitmap, _index) \ @@ -137,6 +142,12 @@ void BLI_bitmap_and_all(BLI_bitmap *dst, const BLI_bitmap *src, size_t bits); */ void BLI_bitmap_or_all(BLI_bitmap *dst, const BLI_bitmap *src, size_t bits); +/** + * Find index of the lowest unset bit. + * Returns -1 if all the bits are set. + */ +int BLI_bitmap_find_first_unset(const BLI_bitmap *bitmap, size_t bits); + #ifdef __cplusplus } #endif |