draw_vertex.c revision c95dcc49629b72b95826e87e067d7a48753605fb 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/*
29 * Functions for specifying the post-transformation vertex layout.
30 *
31 * Author:
32 *    Brian Paul
33 *    Keith Whitwell
34 */
35
36
37#include "draw/draw_private.h"
38#include "draw/draw_vertex.h"
39
40
41/**
42 * Compute the size of a vertex, in dwords/floats, to update the
43 * vinfo->size field.
44 */
45void
46draw_compute_vertex_size(struct vertex_info *vinfo)
47{
48   uint i;
49
50   vinfo->size = 0;
51   for (i = 0; i < vinfo->num_attribs; i++) {
52      switch (vinfo->emit[i]) {
53      case EMIT_OMIT:
54         break;
55      case EMIT_4UB:
56         /* fall-through */
57      case EMIT_1F_PSIZE:
58         /* fall-through */
59      case EMIT_1F:
60         vinfo->size += 1;
61         break;
62      case EMIT_2F:
63         vinfo->size += 2;
64         break;
65      case EMIT_3F:
66         vinfo->size += 3;
67         break;
68      case EMIT_4F:
69         vinfo->size += 4;
70         break;
71      default:
72         assert(0);
73      }
74   }
75
76   assert(vinfo->size * 4 <= MAX_VERTEX_SIZE);
77}
78