forked from KolibriOS/kolibrios
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
|
/**************************************************************************
|
||
|
|
*
|
||
|
|
* 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;
|
||
|
|
}
|