diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_pt_varray_tmp.h')
-rw-r--r-- | src/gallium/auxiliary/draw/draw_pt_varray_tmp.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pt_varray_tmp.h b/src/gallium/auxiliary/draw/draw_pt_varray_tmp.h new file mode 100644 index 0000000000..b9a319b253 --- /dev/null +++ b/src/gallium/auxiliary/draw/draw_pt_varray_tmp.h @@ -0,0 +1,144 @@ + +static void FUNC(struct draw_pt_front_end *frontend, + pt_elt_func get_elt, + const void *elts, + unsigned count) +{ + struct varray_frontend *varray = (struct varray_frontend *)frontend; + struct draw_context *draw = varray->draw; + unsigned start = (unsigned)elts; + + boolean flatfirst = (draw->rasterizer->flatshade && + draw->rasterizer->flatshade_first); + unsigned i, flags; + +#if 0 + debug_printf("%s (%d) %d/%d\n", __FUNCTION__, draw->prim, start, count); +#endif +#if 0 + debug_printf("INPUT PRIM = %d (start = %d, count = %d)\n", varray->input_prim, + start, count); +#endif + + for (i = 0; i < count; ++i) { + varray->fetch_elts[i] = start + i; + } + varray->fetch_count = count; + + switch (varray->input_prim) { + case PIPE_PRIM_POINTS: + for (i = 0; i < count; i ++) { + POINT(varray, i + 0); + } + break; + + case PIPE_PRIM_LINES: + for (i = 0; i+1 < count; i += 2) { + LINE(varray, DRAW_PIPE_RESET_STIPPLE, + i + 0, i + 1); + } + break; + + case PIPE_PRIM_LINE_LOOP: + if (count >= 2) { + flags = DRAW_PIPE_RESET_STIPPLE; + + for (i = 1; i < count; i++, flags = 0) { + LINE(varray, flags, i - 1, i); + } + LINE(varray, flags, i - 1, 0); + } + break; + + case PIPE_PRIM_LINE_STRIP: + flags = DRAW_PIPE_RESET_STIPPLE; + for (i = 1; i < count; i++, flags = 0) { + LINE(varray, flags, i - 1, i); + } + break; + + case PIPE_PRIM_TRIANGLES: + for (i = 0; i+2 < count; i += 3) { + TRIANGLE(varray, DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL, + i + 0, i + 1, i + 2); + } + break; + + case PIPE_PRIM_TRIANGLE_STRIP: + if (flatfirst) { + for (i = 0; i+2 < count; i++) { + TRIANGLE(varray, DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL, + i + 0, i + 1 + (i&1), i + 2 - (i&1)); + } + } + else { + for (i = 0; i+2 < count; i++) { + TRIANGLE(varray, DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL, + i + 0 + (i&1), i + 1 - (i&1), i + 2); + } + } + break; + + case PIPE_PRIM_TRIANGLE_FAN: + if (count >= 3) { + if (flatfirst) { + flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL; + for (i = 0; i+2 < count; i++) { + TRIANGLE(varray, flags, i + 1, i + 2, 0); + } + } + else { + flags = DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL; + for (i = 0; i+2 < count; i++) { + TRIANGLE(varray, flags, 0, i + 1, i + 2); + } + } + } + break; + + case PIPE_PRIM_QUADS: + for (i = 0; i+3 < count; i += 4) { + QUAD(varray, i + 0, i + 1, i + 2, i + 3); + } + break; + + case PIPE_PRIM_QUAD_STRIP: + for (i = 0; i+3 < count; i += 2) { + QUAD(varray, i + 2, i + 0, i + 1, i + 3); + } + break; + + case PIPE_PRIM_POLYGON: + { + /* These bitflags look a little odd because we submit the + * vertices as (1,2,0) to satisfy flatshade requirements. + */ + const unsigned edge_first = DRAW_PIPE_EDGE_FLAG_2; + const unsigned edge_middle = DRAW_PIPE_EDGE_FLAG_0; + const unsigned edge_last = DRAW_PIPE_EDGE_FLAG_1; + + flags = DRAW_PIPE_RESET_STIPPLE | edge_first | edge_middle; + + for (i = 0; i+2 < count; i++, flags = edge_middle) { + + if (i + 3 == count) + flags |= edge_last; + + TRIANGLE(varray, flags, i + 1, i + 2, 0); + } + } + break; + + default: + assert(0); + break; + } + + varray_flush(varray); +} + +#undef TRIANGLE +#undef QUAD +#undef POINT +#undef LINE +#undef FUNC |