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gallium/util: Support POLYGON in u_stream_outputs_for_vertices

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u_decomposed_prims_for_vertices cannot support POLYGON, but POLYGON is
trivial to support as a special case directly (since we have the number
of vertices directly).

Fixes aborts in Panfrost in apps using GL_POLYGON.

Fixes: e881aa8c12 ("gallium/util: Add u_stream_outputs_for_vertices helper")
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Revewied-by: Eric Anholt <eric@anholt.net>
(cherry picked from commit a37822f5f7)
This commit is contained in:
Alyssa Rosenzweig 2019-12-06 16:45:57 -05:00 • committed by Dylan Baker
parent af0d38bfde
commit 47c8b41f8f
1 changed files with 8 additions and 1 deletions
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9
src/gallium/auxiliary/util/u_prim.h
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@ -338,7 +338,14 @@ u_stream_outputs_for_vertices(enum pipe_prim_type primitive, unsigned nr)
/* Extraneous vertices don't contribute to stream outputs */ /* Extraneous vertices don't contribute to stream outputs */
u_trim_pipe_prim(primitive, &nr); u_trim_pipe_prim(primitive, &nr);
/* Consider how many primitives are actually generated */ /* Polygons are special, since they are a single primitive with many
* vertices. In this case, we just have an output for each vertex (after
* trimming) */
if (primitive == PIPE_PRIM_POLYGON)
return nr;
/* Normally, consider how many primitives are actually generated */
unsigned prims = u_decomposed_prims_for_vertices(primitive, nr); unsigned prims = u_decomposed_prims_for_vertices(primitive, nr);
/* One output per vertex after decomposition */ /* One output per vertex after decomposition */