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draw: don't apply flatshading to clipped tris with <3 verts

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If a triangle was completely culled by clipping, we would still try to
fix up its provoking vertex.
This commit is contained in:
Keith Whitwell 2010-09-23 16:11:17 +01:00
parent 1b15a3cafd
commit 8b597b4ea4
1 changed files with 19 additions and 18 deletions
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37
src/gallium/auxiliary/draw/draw_pipe_clip.c
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@ -321,27 +321,28 @@ do_clip_tri( struct draw_stage *stage,
/* If flat-shading, copy provoking vertex color to polygon vertex[0]
*/
if (clipper->flat) {
if (stage->draw->rasterizer->flatshade_first) {
if (inlist[0] != header->v[0]) {
assert(tmpnr < MAX_CLIPPED_VERTICES + 1);
inlist[0] = dup_vert(stage, inlist[0], tmpnr++);
copy_colors(stage, inlist[0], header->v[0]);
if (n >= 3) {
if (clipper->flat) {
if (stage->draw->rasterizer->flatshade_first) {
if (inlist[0] != header->v[0]) {
assert(tmpnr < MAX_CLIPPED_VERTICES + 1);
inlist[0] = dup_vert(stage, inlist[0], tmpnr++);
copy_colors(stage, inlist[0], header->v[0]);
}
}
else {
if (inlist[0] != header->v[2]) {
assert(tmpnr < MAX_CLIPPED_VERTICES + 1);
inlist[0] = dup_vert(stage, inlist[0], tmpnr++);
copy_colors(stage, inlist[0], header->v[2]);
}
}
}
else {
if (inlist[0] != header->v[2]) {
assert(tmpnr < MAX_CLIPPED_VERTICES + 1);
inlist[0] = dup_vert(stage, inlist[0], tmpnr++);
copy_colors(stage, inlist[0], header->v[2]);
}
}
}
/* Emit the polygon as triangles to the setup stage:
*/
if (n >= 3)
/* Emit the polygon as triangles to the setup stage:
*/
emit_poly( stage, inlist, n, header );
}
}