1
2 /*
3 * Mesa 3-D graphics library
4 *
5 * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * 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 */
TAG(dotprod_vec2)33 static 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
TAG(dotprod_vec3)53 static 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
TAG(dotprod_vec4)75 static 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
TAG(init_dotprod)97 static 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