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draw: don't crash if GS doesn't emit anything

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Technically it's legal for geometry shader to not emit any
vertices. It's silly, but perfectly legal, so lets make draw
stop crashing if it happens.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
Zack Rusin 2013-04-27 08:55:36 -04:00
parent e56095dc2e
commit d48054ff22
2 changed files with 18 additions and 0 deletions
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9
src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c
View file

@ -299,6 +299,15 @@ static void fetch_pipeline_generic( struct draw_pt_middle_end *middle,
}
}
}
if (prim_info->count == 0) {
debug_printf("GS/IA didn't emit any vertices!\n");
FREE(vert_info->verts);
if (free_prim_info) {
FREE(prim_info->primitive_lengths);
}
return;
}
/* Stream output needs to be done before clipping.

9
src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c
View file

@ -397,6 +397,15 @@ llvm_pipeline_generic( struct draw_pt_middle_end *middle,
}
}
}
if (prim_info->count == 0) {
debug_printf("GS/IA didn't emit any vertices!\n");
FREE(vert_info->verts);
if (free_prim_info) {
FREE(prim_info->primitive_lengths);
}
return;
}
/* stream output needs to be done before clipping */
draw_pt_so_emit( fpme->so_emit, vert_info, prim_info );