draw: Add new util function draw_pt_trim_count.

draw_pt_trim_count is renamed from trim in draw_pt.c.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/draw/draw_pt_util.c b/src/gallium/auxiliary/draw/draw_pt_util.c
index 182a597cca..513bbbed21 100644
--- a/src/gallium/auxiliary/draw/draw_pt_util.c
+++ b/src/gallium/auxiliary/draw/draw_pt_util.c
@@ -92,3 +92,10 @@ void draw_pt_split_prim(unsigned prim, unsigned *first, unsigned *incr)
       break;
    }
 }
+
+unsigned draw_pt_trim_count(unsigned count, unsigned first, unsigned incr)
+{
+   if (count < first)
+      return 0;
+   return count - (count - first) % incr;
+}