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-rw-r--r--src/gallium/auxiliary/draw/draw_pipe_offset.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_offset.c b/src/gallium/auxiliary/draw/draw_pipe_offset.c
index 8afbbfa1569..3da52b10624 100644
--- a/src/gallium/auxiliary/draw/draw_pipe_offset.c
+++ b/src/gallium/auxiliary/draw/draw_pipe_offset.c
@@ -43,6 +43,7 @@ struct offset_stage {
float scale;
float units;
+ float clamp;
};
@@ -90,6 +91,10 @@ static void do_offset_tri( struct draw_stage *stage,
float zoffset = offset->units + MAX2(dzdx, dzdy) * offset->scale;
+ if (offset->clamp)
+ zoffset = (offset->clamp < 0.0f) ? MAX2(zoffset, offset->clamp) :
+ MIN2(zoffset, offset->clamp);
+
/*
* Note: we're applying the offset and clamping per-vertex.
* Ideally, the offset is applied per-fragment prior to fragment shading.
@@ -125,6 +130,7 @@ static void offset_first_tri( struct draw_stage *stage,
offset->units = (float) (stage->draw->rasterizer->offset_units * stage->draw->mrd);
offset->scale = stage->draw->rasterizer->offset_scale;
+ offset->clamp = stage->draw->rasterizer->offset_clamp;
stage->tri = offset_tri;
stage->tri( stage, header );