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Diffstat (limited to 'src/gallium/aux/draw/draw_debug.c')
-rw-r--r-- | src/gallium/aux/draw/draw_debug.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/gallium/aux/draw/draw_debug.c b/src/gallium/aux/draw/draw_debug.c new file mode 100644 index 0000000..d6220b5 --- /dev/null +++ b/src/gallium/aux/draw/draw_debug.c @@ -0,0 +1,113 @@ +/************************************************************************** + * + * 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 <keith@tungstengraphics.com> + */ + +#include "draw_private.h" +#include "draw_context.h" + + + +static void +draw_prim_info(unsigned prim, unsigned *first, unsigned *incr) +{ + assert(prim >= PIPE_PRIM_POINTS); + assert(prim <= PIPE_PRIM_POLYGON); + + switch (prim) { + case PIPE_PRIM_POINTS: + *first = 1; + *incr = 1; + break; + case PIPE_PRIM_LINES: + *first = 2; + *incr = 2; + break; + case PIPE_PRIM_LINE_STRIP: + *first = 2; + *incr = 1; + break; + case PIPE_PRIM_LINE_LOOP: + *first = 2; + *incr = 1; + break; + case PIPE_PRIM_TRIANGLES: + *first = 3; + *incr = 3; + break; + case PIPE_PRIM_TRIANGLE_STRIP: + *first = 3; + *incr = 1; + break; + case PIPE_PRIM_TRIANGLE_FAN: + case PIPE_PRIM_POLYGON: + *first = 3; + *incr = 1; + break; + case PIPE_PRIM_QUADS: + *first = 4; + *incr = 4; + break; + case PIPE_PRIM_QUAD_STRIP: + *first = 4; + *incr = 2; + break; + default: + assert(0); + *first = 1; + *incr = 1; + break; + } +} + + +unsigned +draw_trim_prim( unsigned mode, unsigned count ) +{ + unsigned length, first, incr; + + draw_prim_info( mode, &first, &incr ); + + if (count < first) + length = 0; + else + length = count - (count - first) % incr; + + return length; +} + + +boolean +draw_validate_prim( unsigned mode, unsigned count ) +{ + return (count > 0 && + count == draw_trim_prim( mode, count )); +} + |