BLI_rand: support for randomizing bitmaps

Add utility functions:

- BLI_bitmap_randomize
- BLI_rng_shuffle_bitmap

Part of D11685

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_rand.h b/source/blender/blenlib/BLI_rand.h
index ec74cef9311..f8627952628 100644
--- a/source/blender/blenlib/BLI_rand.h
+++ b/source/blender/blenlib/BLI_rand.h
@@ -71,6 +71,9 @@ void BLI_rng_shuffle_array(struct RNG *rng,
                            unsigned int elem_size_i,
                            unsigned int elem_tot) ATTR_NONNULL(1, 2);
 
+void BLI_rng_shuffle_bitmap(struct RNG *rng, unsigned int *bitmap, unsigned int bits_tot)
+    ATTR_NONNULL(1, 2);
+
 /** Note that skipping is as slow as generating n numbers! */
 void BLI_rng_skip(struct RNG *rng, int n) ATTR_NONNULL(1);
 
@@ -89,6 +92,9 @@ void BLI_array_randomize(void *data,
                          unsigned int elem_tot,
                          unsigned int seed);
 
+void BLI_bitmap_randomize(unsigned int *bitmap, unsigned int bits_tot, unsigned int seed)
+    ATTR_NONNULL(1);
+
 /** Better seed for the random number generator, using noise.c hash[] */
 /** Allows up to BLENDER_MAX_THREADS threads to address */
 void BLI_thread_srandom(int thread, unsigned int seed);