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draw: fix first provoking vertex mode for quads, quad strips and polygons

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This commit is contained in:
Brian Paul 2009-06-18 22:48:51 -06:00
parent 950171be3c
commit af5fff9c23
1 changed files with 55 additions and 18 deletions
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73
src/gallium/auxiliary/draw/draw_pt_vcache_tmp.h
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@ -118,21 +118,39 @@ static void FUNC( struct draw_pt_front_end *frontend,
case PIPE_PRIM_QUADS:
for (i = 0; i+3 < count; i += 4) {
QUAD( vcache,
get_elt(elts, i + 0),
get_elt(elts, i + 1),
get_elt(elts, i + 2),
get_elt(elts, i + 3));
if (flatfirst) {
QUAD( vcache,
get_elt(elts, i + 0),
get_elt(elts, i + 1),
get_elt(elts, i + 2),
get_elt(elts, i + 3) );
}
else {
QUAD( vcache,
get_elt(elts, i + 0),
get_elt(elts, i + 1),
get_elt(elts, i + 2),
get_elt(elts, i + 3) );
}
}
break;
case PIPE_PRIM_QUAD_STRIP:
for (i = 0; i+3 < count; i += 2) {
QUAD( vcache,
get_elt(elts, i + 2),
get_elt(elts, i + 0),
get_elt(elts, i + 1),
get_elt(elts, i + 3));
if (flatfirst) {
QUAD( vcache,
get_elt(elts, i + 0),
get_elt(elts, i + 1),
get_elt(elts, i + 3),
get_elt(elts, i + 2) );
}
else {
QUAD( vcache,
get_elt(elts, i + 2),
get_elt(elts, i + 0),
get_elt(elts, i + 1),
get_elt(elts, i + 3) );
}
}
break;
@ -144,19 +162,38 @@ static void FUNC( struct draw_pt_front_end *frontend,
const ushort edge_first = DRAW_PIPE_EDGE_FLAG_2;
const ushort edge_middle = DRAW_PIPE_EDGE_FLAG_0;
const ushort edge_last = DRAW_PIPE_EDGE_FLAG_1;
ushort edge_next, edge_finish;
flags = DRAW_PIPE_RESET_STIPPLE | edge_first | edge_middle;
if (flatfirst) {
flags = DRAW_PIPE_RESET_STIPPLE | edge_middle | edge_last;
edge_next = edge_last;
edge_finish = edge_first;
}
else {
flags = DRAW_PIPE_RESET_STIPPLE | edge_first | edge_middle;
edge_next = edge_middle;
edge_finish = edge_last;
}
for (i = 0; i+2 < count; i++, flags = edge_middle) {
for (i = 0; i+2 < count; i++, flags = edge_next) {
if (i + 3 == count)
flags |= edge_last;
flags |= edge_finish;
TRIANGLE( vcache,
flags,
get_elt(elts, i + 1),
get_elt(elts, i + 2),
get_elt(elts, 0));
if (flatfirst) {
TRIANGLE( vcache,
flags,
get_elt(elts, 0),
get_elt(elts, i + 1),
get_elt(elts, i + 2) );
}
else {
TRIANGLE( vcache,
flags,
get_elt(elts, i + 1),
get_elt(elts, i + 2),
get_elt(elts, 0));
}
}
}
break;