diff options
Diffstat (limited to 'src/mesa/pipe/draw/draw_unfilled.c')
| -rw-r--r-- | src/mesa/pipe/draw/draw_unfilled.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/mesa/pipe/draw/draw_unfilled.c b/src/mesa/pipe/draw/draw_unfilled.c new file mode 100644 index 00000000000..ab0dab09d4b --- /dev/null +++ b/src/mesa/pipe/draw/draw_unfilled.c @@ -0,0 +1,165 @@ +/************************************************************************** + * + * 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. + * + **************************************************************************/ + +/* Authors: Keith Whitwell <[email protected]> + */ +#include "imports.h" + +#include "sp_context.h" +#include "sp_prim.h" +#include "pipe/p_defines.h" + + +struct unfilled_stage { + struct prim_stage stage; + + GLuint mode[2]; +}; + + +static INLINE struct unfilled_stage *unfilled_stage( struct prim_stage *stage ) +{ + return (struct unfilled_stage *)stage; +} + + +static void unfilled_begin( struct prim_stage *stage ) +{ + struct unfilled_stage *unfilled = unfilled_stage(stage); + + unfilled->mode[0] = stage->softpipe->setup.fill_ccw; + unfilled->mode[1] = stage->softpipe->setup.fill_cw; + + stage->next->begin( stage->next ); +} + +static void point( struct prim_stage *stage, + struct vertex_header *v0 ) +{ + struct prim_header tmp; + tmp.v[0] = v0; + stage->next->point( stage->next, &tmp ); +} + +static void line( struct prim_stage *stage, + struct vertex_header *v0, + struct vertex_header *v1 ) +{ + struct prim_header tmp; + tmp.v[0] = v0; + tmp.v[1] = v1; + stage->next->line( stage->next, &tmp ); +} + + +static void points( struct prim_stage *stage, + struct prim_header *header ) +{ + struct vertex_header *v0 = header->v[0]; + struct vertex_header *v1 = header->v[1]; + struct vertex_header *v2 = header->v[2]; + + if (v0->edgeflag) point( stage, v0 ); + if (v1->edgeflag) point( stage, v1 ); + if (v2->edgeflag) point( stage, v2 ); +} + +static void lines( struct prim_stage *stage, + struct prim_header *header ) +{ + struct vertex_header *v0 = header->v[0]; + struct vertex_header *v1 = header->v[1]; + struct vertex_header *v2 = header->v[2]; + + if (v0->edgeflag) line( stage, v0, v1 ); + if (v1->edgeflag) line( stage, v1, v2 ); + if (v2->edgeflag) line( stage, v2, v0 ); +} + + +/* Unfilled tri: + * + * Note edgeflags in the vertex struct is not sufficient as we will + * need to manipulate them when decomposing primitives??? + */ +static void unfilled_tri( struct prim_stage *stage, + struct prim_header *header ) +{ + struct unfilled_stage *unfilled = unfilled_stage(stage); + GLuint mode = unfilled->mode[header->det < 0]; + + switch (mode) { + case PIPE_POLYGON_MODE_FILL: + stage->next->tri( stage->next, header ); + break; + case PIPE_POLYGON_MODE_LINE: + lines( stage, header ); + break; + case PIPE_POLYGON_MODE_POINT: + points( stage, header ); + break; + default: + abort(); + } +} + +static void unfilled_line( struct prim_stage *stage, + struct prim_header *header ) +{ + stage->next->line( stage->next, header ); +} + + +static void unfilled_point( struct prim_stage *stage, + struct prim_header *header ) +{ + stage->next->point( stage->next, header ); +} + + +static void unfilled_end( struct prim_stage *stage ) +{ + stage->next->end( stage->next ); +} + +struct prim_stage *prim_unfilled( struct softpipe_context *softpipe ) +{ + struct unfilled_stage *unfilled = CALLOC_STRUCT(unfilled_stage); + + prim_alloc_tmps( &unfilled->stage, 0 ); + + unfilled->stage.softpipe = softpipe; + unfilled->stage.next = NULL; + unfilled->stage.tmp = NULL; + unfilled->stage.begin = unfilled_begin; + unfilled->stage.point = unfilled_point; + unfilled->stage.line = unfilled_line; + unfilled->stage.tri = unfilled_tri; + unfilled->stage.end = unfilled_end; + + return &unfilled->stage; +} |