1
2/*
3 * Mesa 3-D graphics library
4 * Version:  3.5
5 *
6 * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions 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 MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26/*
27 * New (3.1) transformation code written by Keith Whitwell.
28 */
29
30
31/* Note - respects the stride of the output vector.
32 */
33static void TAG(dotprod_vec2)( GLfloat *out,
34			       GLuint outstride,
35			       const GLvector4f *coord_vec,
36			       const GLfloat plane[4] )
37{
38   GLuint stride = coord_vec->stride;
39   GLfloat *coord = coord_vec->start;
40   GLuint count = coord_vec->count;
41
42   GLuint i;
43
44   const GLfloat plane0 = plane[0], plane1 = plane[1], plane3 = plane[3];
45
46   for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(out,outstride)) {
47      *out = (coord[0] * plane0 +
48	      coord[1] * plane1 +
49	      plane3);
50   }
51}
52
53static void TAG(dotprod_vec3)( GLfloat *out,
54			       GLuint outstride,
55			       const GLvector4f *coord_vec,
56			       const GLfloat plane[4] )
57{
58   GLuint stride = coord_vec->stride;
59   GLfloat *coord = coord_vec->start;
60   GLuint count = coord_vec->count;
61
62   GLuint i;
63
64   const GLfloat plane0 = plane[0], plane1 = plane[1], plane2 = plane[2];
65   const GLfloat plane3 = plane[3];
66
67   for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(out,outstride)) {
68      *out = (coord[0] * plane0 +
69	      coord[1] * plane1 +
70	      coord[2] * plane2 +
71	      plane3);
72   }
73}
74
75static void TAG(dotprod_vec4)( GLfloat *out,
76			       GLuint outstride,
77			       const GLvector4f *coord_vec,
78			       const GLfloat plane[4] )
79{
80   GLuint stride = coord_vec->stride;
81   GLfloat *coord = coord_vec->start;
82   GLuint count = coord_vec->count;
83   GLuint i;
84
85   const GLfloat plane0 = plane[0], plane1 = plane[1], plane2 = plane[2];
86   const GLfloat plane3 = plane[3];
87
88   for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(out,outstride)) {
89      *out = (coord[0] * plane0 +
90	      coord[1] * plane1 +
91	      coord[2] * plane2 +
92	      coord[3] * plane3);
93   }
94}
95
96
97static void TAG(init_dotprod)( void )
98{
99   _mesa_dotprod_tab[2] = TAG(dotprod_vec2);
100   _mesa_dotprod_tab[3] = TAG(dotprod_vec3);
101   _mesa_dotprod_tab[4] = TAG(dotprod_vec4);
102}
103