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softpipe: Handle adjacency primitives. 

Not fully tested.

Based on diagrams from
http://msdn.microsoft.com/en-us/library/windows/desktop/bb205124.aspx#Primitive_Adjacency

v2: Fix based on Brian's feedback.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
José Fonseca 2012-11-06 11:35:31 +00:00
parent 5d12c7b755
commit b7283834dc
1 changed files with 46 additions and 0 deletions
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46
src/gallium/drivers/softpipe/sp_prim_vbuf.c
View File

@ -380,6 +380,14 @@ sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
}
break;
case PIPE_PRIM_LINES_ADJACENCY:
for (i = 3; i < nr; i += 4) {
sp_setup_line( setup,
get_vert(vertex_buffer, i-2, stride),
get_vert(vertex_buffer, i-1, stride) );
}
break;
case PIPE_PRIM_LINE_STRIP:
for (i = 1; i < nr; i ++) {
sp_setup_line( setup,
@ -388,6 +396,14 @@ sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
}
break;
case PIPE_PRIM_LINE_STRIP_ADJACENCY:
for (i = 3; i < nr; i++) {
sp_setup_line( setup,
get_vert(vertex_buffer, i-2, stride),
get_vert(vertex_buffer, i-1, stride) );
}
break;
case PIPE_PRIM_LINE_LOOP:
for (i = 1; i < nr; i ++) {
sp_setup_line( setup,
@ -410,6 +426,15 @@ sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
}
break;
case PIPE_PRIM_TRIANGLES_ADJACENCY:
for (i = 5; i < nr; i += 6) {
sp_setup_tri( setup,
get_vert(vertex_buffer, i-5, stride),
get_vert(vertex_buffer, i-3, stride),
get_vert(vertex_buffer, i-1, stride) );
}
break;
case PIPE_PRIM_TRIANGLE_STRIP:
if (flatshade_first) {
for (i = 2; i < nr; i++) {
@ -431,6 +456,27 @@ sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
}
break;
case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY:
if (flatshade_first) {
for (i = 5; i < nr; i += 2) {
/* emit first triangle vertex as first triangle vertex */
sp_setup_tri( setup,
get_vert(vertex_buffer, i-5, stride),
get_vert(vertex_buffer, i+(i&1)*2-3, stride),
get_vert(vertex_buffer, i-(i&1)*2-1, stride) );
}
}
else {
for (i = 5; i < nr; i += 2) {
/* emit last triangle vertex as last triangle vertex */
sp_setup_tri( setup,
get_vert(vertex_buffer, i+(i&1)*2-5, stride),
get_vert(vertex_buffer, i-(i&1)*2-3, stride),
get_vert(vertex_buffer, i-1, stride) );
}
}
break;
case PIPE_PRIM_TRIANGLE_FAN:
if (flatshade_first) {
for (i = 2; i < nr; i += 1) {