diff options
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_prim.h')
-rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_prim.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_prim.h b/mesalib/src/gallium/auxiliary/util/u_prim.h index fd95c0ba0..cf1a18f42 100644 --- a/mesalib/src/gallium/auxiliary/util/u_prim.h +++ b/mesalib/src/gallium/auxiliary/util/u_prim.h @@ -136,6 +136,21 @@ u_prim_vertex_count(unsigned prim) return (likely(prim < PIPE_PRIM_MAX)) ? &prim_table[prim] : NULL; } +/** + * Given a vertex count, return the number of primitives. + * For polygons, return the number of triangles. + */ +static INLINE unsigned +u_prims_for_vertices(unsigned prim, unsigned num) +{ + const struct u_prim_vertex_count *info = u_prim_vertex_count(prim); + + if (num < info->min) + return 0; + + return 1 + ((num - info->min) / info->incr); +} + static INLINE boolean u_validate_pipe_prim( unsigned pipe_prim, unsigned nr ) { const struct u_prim_vertex_count *count = u_prim_vertex_count(pipe_prim); |