diff options
Diffstat (limited to 'src/mesa/pipe/softpipe/sp_quad_coverage.c')
-rw-r--r-- | src/mesa/pipe/softpipe/sp_quad_coverage.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/mesa/pipe/softpipe/sp_quad_coverage.c b/src/mesa/pipe/softpipe/sp_quad_coverage.c new file mode 100644 index 0000000000..05cd03bce0 --- /dev/null +++ b/src/mesa/pipe/softpipe/sp_quad_coverage.c @@ -0,0 +1,79 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + +/** + * \brief Apply AA coverage to quad alpha valus + * \author Brian Paul + */ + + +#include "main/glheader.h" +#include "main/macros.h" +#include "pipe/p_defines.h" +#include "sp_context.h" +#include "sp_headers.h" +#include "sp_quad.h" + + +/** + * Multiply quad's alpha values by the fragment coverage. + */ +static void +apply_aa_coverage_quad(struct quad_stage *qs, struct quad_header *quad) +{ +#if 0 + struct softpipe_context *softpipe = qs->softpipe; + + /* XXX need to know if this quad is from a point, line or polygon! */ + if ((softpipe->setup.poly_smooth && prim == POLYGON) || + (softpipe->setup.line_smooth && prim == LINE) || + (softpipe->setup.point_smooth && prim == POINT)) { +#endif + GLuint j; + for (j = 0; j < QUAD_SIZE; j++) { + assert(quad->coverage[j] >= 0.0); + assert(quad->coverage[j] <= 1.0); + quad->outputs.color[3][j] *= quad->coverage[j]; + } +#if 0 + } +#endif + + qs->next->run(qs->next, quad); +} + + +struct quad_stage *sp_quad_coverage_stage( struct softpipe_context *softpipe ) +{ + struct quad_stage *stage = CALLOC_STRUCT(quad_stage); + + stage->softpipe = softpipe; + stage->run = apply_aa_coverage_quad; + + return stage; +} |