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authorZack Rusin <zackr@vmware.com>2010-06-16 15:03:55 -0400
committerZack Rusin <zackr@vmware.com>2010-06-16 15:03:55 -0400
commit0b8e1980276a3935e6748e2f459313ffd2681146 (patch)
tree18b9e705d8e349179b59acc322873dca9eed39a3 /src/gallium/auxiliary/draw
parent287531772ccea82c8a6c4dab5656d751a8943524 (diff)
draw: add stream output decomposition file
Diffstat (limited to 'src/gallium/auxiliary/draw')
-rw-r--r--src/gallium/auxiliary/draw/draw_so_emit_tmp.h123
1 files changed, 123 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_so_emit_tmp.h b/src/gallium/auxiliary/draw/draw_so_emit_tmp.h
new file mode 100644
index 0000000000..01212a8e53
--- /dev/null
+++ b/src/gallium/auxiliary/draw/draw_so_emit_tmp.h
@@ -0,0 +1,123 @@
+
+static void FUNC( struct pt_so_emit *so,
+ const struct draw_prim_info *input_prims,
+ const struct draw_vertex_info *input_verts,
+ unsigned start,
+ unsigned count)
+{
+ struct draw_context *draw = so->draw;
+
+ boolean flatfirst = (draw->rasterizer->flatshade &&
+ draw->rasterizer->flatshade_first);
+ unsigned i;
+ LOCAL_VARS
+
+ if (0) debug_printf("%s %d\n", __FUNCTION__, count);
+
+ debug_assert(input_prims->primitive_count == 1);
+
+ switch (input_prims->prim) {
+ case PIPE_PRIM_POINTS:
+ for (i = 0; i < count; i++) {
+ POINT( so, start + i + 0 );
+ }
+ break;
+
+ case PIPE_PRIM_LINES:
+ for (i = 0; i+1 < count; i += 2) {
+ LINE( so , start + i + 0 , start + i + 1 );
+ }
+ break;
+
+ case PIPE_PRIM_LINE_LOOP:
+ if (count >= 2) {
+
+ for (i = 1; i < count; i++) {
+ LINE( so, start + i - 1, start + i );
+ }
+
+ LINE( so, start + i - 1, start );
+ }
+ break;
+
+ case PIPE_PRIM_LINE_STRIP:
+ for (i = 1; i < count; i++) {
+ LINE( so, start + i - 1, start + i );
+ }
+ break;
+
+ case PIPE_PRIM_TRIANGLES:
+ for (i = 0; i+2 < count; i += 3) {
+ TRIANGLE( so, start + i + 0, start + i + 1, start + i + 2 );
+ }
+ break;
+
+ case PIPE_PRIM_TRIANGLE_STRIP:
+ if (flatfirst) {
+ for (i = 0; i+2 < count; i++) {
+ TRIANGLE( so,
+ start + i + 0,
+ start + i + 1 + (i&1),
+ start + i + 2 - (i&1) );
+ }
+ }
+ else {
+ for (i = 0; i+2 < count; i++) {
+ TRIANGLE( so,
+ start + i + 0 + (i&1),
+ start + i + 1 - (i&1),
+ start + i + 2 );
+ }
+ }
+ break;
+
+ case PIPE_PRIM_TRIANGLE_FAN:
+ if (count >= 3) {
+ if (flatfirst) {
+ for (i = 0; i+2 < count; i++) {
+ TRIANGLE( so,
+ start + i + 1,
+ start + i + 2,
+ start );
+ }
+ }
+ else {
+ for (i = 0; i+2 < count; i++) {
+ TRIANGLE( so,
+ start,
+ start + i + 1,
+ start + i + 2 );
+ }
+ }
+ }
+ break;
+
+ case PIPE_PRIM_POLYGON:
+ {
+ /* These bitflags look a little odd because we submit the
+ * vertices as (1,2,0) to satisfy flatshade requirements.
+ */
+
+ for (i = 0; i+2 < count; i++) {
+
+ if (flatfirst) {
+ TRIANGLE( so, start + 0, start + i + 1, start + i + 2 );
+ }
+ else {
+ TRIANGLE( so, start + i + 1, start + i + 2, start + 0 );
+ }
+ }
+ }
+ break;
+
+ default:
+ debug_assert(!"Unsupported primitive in stream output");
+ break;
+ }
+}
+
+
+#undef TRIANGLE
+#undef POINT
+#undef LINE
+#undef FUNC