0,0 → 1,101 |
/************************************************************************** |
* |
* 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/draw_context.h" |
#include "draw/draw_private.h" |
#include "draw/draw_pt.h" |
#include "util/u_debug.h" |
|
void draw_pt_split_prim(unsigned prim, unsigned *first, unsigned *incr) |
{ |
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: |
case PIPE_PRIM_LINE_LOOP: |
*first = 2; |
*incr = 1; |
break; |
case PIPE_PRIM_LINES_ADJACENCY: |
*first = 4; |
*incr = 4; |
break; |
case PIPE_PRIM_LINE_STRIP_ADJACENCY: |
*first = 4; |
*incr = 1; |
break; |
case PIPE_PRIM_TRIANGLES: |
*first = 3; |
*incr = 3; |
break; |
case PIPE_PRIM_TRIANGLES_ADJACENCY: |
*first = 6; |
*incr = 6; |
break; |
case PIPE_PRIM_TRIANGLE_STRIP: |
case PIPE_PRIM_TRIANGLE_FAN: |
case PIPE_PRIM_POLYGON: |
*first = 3; |
*incr = 1; |
break; |
case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY: |
*first = 6; |
*incr = 2; |
break; |
case PIPE_PRIM_QUADS: |
*first = 4; |
*incr = 4; |
break; |
case PIPE_PRIM_QUAD_STRIP: |
*first = 4; |
*incr = 2; |
break; |
default: |
assert(0); |
*first = 0; |
*incr = 1; /* set to one so that count % incr works */ |
break; |
} |
} |
|
unsigned draw_pt_trim_count(unsigned count, unsigned first, unsigned incr) |
{ |
if (count < first) |
return 0; |
return count - (count - first) % incr; |
} |