diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pipe_offset.c | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_offset.c b/src/gallium/auxiliary/draw/draw_pipe_offset.c index 3da52b10624..3578525051f 100644 --- a/src/gallium/auxiliary/draw/draw_pipe_offset.c +++ b/src/gallium/auxiliary/draw/draw_pipe_offset.c @@ -127,10 +127,44 @@ static void offset_first_tri( struct draw_stage *stage, struct prim_header *header ) { struct offset_stage *offset = offset_stage(stage); + const struct pipe_rasterizer_state *rast = stage->draw->rasterizer; + unsigned fill_mode = rast->fill_front; + boolean do_offset; + + if (rast->fill_back != rast->fill_front) { + /* Need to check for back-facing triangle */ + boolean ccw = header->det < 0.0f; + if (ccw != rast->front_ccw) + fill_mode = rast->fill_back; + } + + /* Now determine if we need to do offsetting for the point/line/fill mode */ + switch (fill_mode) { + case PIPE_POLYGON_MODE_FILL: + do_offset = rast->offset_tri; + break; + case PIPE_POLYGON_MODE_LINE: + do_offset = rast->offset_line; + break; + case PIPE_POLYGON_MODE_POINT: + do_offset = rast->offset_point; + break; + default: + assert(!"invalid fill_mode in offset_first_tri()"); + do_offset = rast->offset_tri; + } + + if (do_offset) { + offset->scale = rast->offset_scale; + offset->clamp = rast->offset_clamp; + offset->units = (float) (rast->offset_units * stage->draw->mrd); + } + else { + offset->scale = 0.0f; + offset->clamp = 0.0f; + offset->units = 0.0f; + } - offset->units = (float) (stage->draw->rasterizer->offset_units * stage->draw->mrd); - offset->scale = stage->draw->rasterizer->offset_scale; - offset->clamp = stage->draw->rasterizer->offset_clamp; stage->tri = offset_tri; stage->tri( stage, header ); |