diff options
Diffstat (limited to 'src/gallium/auxiliary/draw')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pipe_vbuf.c | 15 | ||||
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pt_decompose.h | 72 |
2 files changed, 67 insertions, 20 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_vbuf.c b/src/gallium/auxiliary/draw/draw_pipe_vbuf.c index a5d840b96ea..1a5269c0de9 100644 --- a/src/gallium/auxiliary/draw/draw_pipe_vbuf.c +++ b/src/gallium/auxiliary/draw/draw_pipe_vbuf.c @@ -159,8 +159,19 @@ vbuf_tri( struct draw_stage *stage, check_space( vbuf, 3 ); - for (i = 0; i < 3; i++) { - vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] ); + if (vbuf->stage.draw->rasterizer->flatshade_first) { + /* Put provoking vertex in position expected by the driver. + * Emit last provoking vertex in first pos. + * Swap verts 0 & 1 to preserve polygon winding. + */ + vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[2] ); + vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[0] ); + vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[1] ); + } + else { + for (i = 0; i < 3; i++) { + vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] ); + } } } diff --git a/src/gallium/auxiliary/draw/draw_pt_decompose.h b/src/gallium/auxiliary/draw/draw_pt_decompose.h index 3fb06956878..a86c8d7877f 100644 --- a/src/gallium/auxiliary/draw/draw_pt_decompose.h +++ b/src/gallium/auxiliary/draw/draw_pt_decompose.h @@ -47,20 +47,36 @@ static void FUNC( ARGS, case PIPE_PRIM_TRIANGLES: for (i = 0; i+2 < count; i += 3) { - TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL, - (i + 0), - (i + 1), - (i + 2 )); + if (draw->rasterizer->flatshade_first) { + /* put provoking vertex in last pos for clipper */ + TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL, + (i + 1), + (i + 2), + (i + 0 )); + } + else { + TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL, + (i + 0), + (i + 1), + (i + 2 )); + } } break; case PIPE_PRIM_TRIANGLE_STRIP: if (flatfirst) { + printf("%s tri strip %d %d %d\n", + __FUNCTION__, + (i + 1 + (i&1)), + (i + 2 - (i&1)), + (i + 0) ); + + for (i = 0; i+2 < count; i++) { TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL, - (i + 0), (i + 1 + (i&1)), - (i + 2 - (i&1))); + (i + 2 - (i&1)), + (i + 0) ); } } else { @@ -78,9 +94,9 @@ static void FUNC( ARGS, if (flatfirst) { for (i = 0; i+2 < count; i++) { TRIANGLE( DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL, - (i + 1), (i + 2), - (0 )); + 0, + (i + 1) ); } } else { @@ -96,20 +112,40 @@ static void FUNC( ARGS, case PIPE_PRIM_QUADS: - for (i = 0; i+3 < count; i += 4) { - QUAD( (i + 0), - (i + 1), - (i + 2), - (i + 3)); + if (flatfirst) { + for (i = 0; i+3 < count; i += 4) { + QUAD( (i + 1), + (i + 2), + (i + 3), + (i + 0) ); + } + } + else { + for (i = 0; i+3 < count; i += 4) { + QUAD( (i + 0), + (i + 1), + (i + 2), + (i + 3)); + } } break; case PIPE_PRIM_QUAD_STRIP: - for (i = 0; i+3 < count; i += 2) { - QUAD( (i + 2), - (i + 0), - (i + 1), - (i + 3)); + if (flatfirst) { + for (i = 0; i+3 < count; i += 2) { + QUAD( (i + 1), + (i + 3), + (i + 2), + (i + 0) ); + } + } + else { + for (i = 0; i+3 < count; i += 2) { + QUAD( (i + 2), + (i + 0), + (i + 1), + (i + 3)); + } } break; |