1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.1
4 *
5 * Copyright (C) 1999-2004 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 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Keith Whitwell <keith@tungstengraphics.com>
26 */
27
28 #include "main/glheader.h"
29 #include "main/context.h"
30 #include "main/macros.h"
31 #include "math/m_eval.h"
32 #include "main/dispatch.h"
33 #include "vbo_exec.h"
34
35
clear_active_eval1(struct vbo_exec_context * exec,GLuint attr)36 static void clear_active_eval1( struct vbo_exec_context *exec, GLuint attr )
37 {
38 assert(attr < Elements(exec->eval.map1));
39 exec->eval.map1[attr].map = NULL;
40 }
41
clear_active_eval2(struct vbo_exec_context * exec,GLuint attr)42 static void clear_active_eval2( struct vbo_exec_context *exec, GLuint attr )
43 {
44 assert(attr < Elements(exec->eval.map2));
45 exec->eval.map2[attr].map = NULL;
46 }
47
set_active_eval1(struct vbo_exec_context * exec,GLuint attr,GLuint dim,struct gl_1d_map * map)48 static void set_active_eval1( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
49 struct gl_1d_map *map )
50 {
51 assert(attr < Elements(exec->eval.map1));
52 if (!exec->eval.map1[attr].map) {
53 exec->eval.map1[attr].map = map;
54 exec->eval.map1[attr].sz = dim;
55 }
56 }
57
set_active_eval2(struct vbo_exec_context * exec,GLuint attr,GLuint dim,struct gl_2d_map * map)58 static void set_active_eval2( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
59 struct gl_2d_map *map )
60 {
61 assert(attr < Elements(exec->eval.map2));
62 if (!exec->eval.map2[attr].map) {
63 exec->eval.map2[attr].map = map;
64 exec->eval.map2[attr].sz = dim;
65 }
66 }
67
vbo_exec_eval_update(struct vbo_exec_context * exec)68 void vbo_exec_eval_update( struct vbo_exec_context *exec )
69 {
70 struct gl_context *ctx = exec->ctx;
71 GLuint attr;
72
73 /* Vertex program maps have priority over conventional attribs */
74
75 for (attr = 0; attr < VBO_ATTRIB_FIRST_MATERIAL; attr++) {
76 clear_active_eval1( exec, attr );
77 clear_active_eval2( exec, attr );
78 }
79
80 if (ctx->Eval.Map1Color4)
81 set_active_eval1( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map1Color4 );
82
83 if (ctx->Eval.Map2Color4)
84 set_active_eval2( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map2Color4 );
85
86 if (ctx->Eval.Map1TextureCoord4)
87 set_active_eval1( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map1Texture4 );
88 else if (ctx->Eval.Map1TextureCoord3)
89 set_active_eval1( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map1Texture3 );
90 else if (ctx->Eval.Map1TextureCoord2)
91 set_active_eval1( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map1Texture2 );
92 else if (ctx->Eval.Map1TextureCoord1)
93 set_active_eval1( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map1Texture1 );
94
95 if (ctx->Eval.Map2TextureCoord4)
96 set_active_eval2( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map2Texture4 );
97 else if (ctx->Eval.Map2TextureCoord3)
98 set_active_eval2( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map2Texture3 );
99 else if (ctx->Eval.Map2TextureCoord2)
100 set_active_eval2( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map2Texture2 );
101 else if (ctx->Eval.Map2TextureCoord1)
102 set_active_eval2( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map2Texture1 );
103
104 if (ctx->Eval.Map1Normal)
105 set_active_eval1( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map1Normal );
106
107 if (ctx->Eval.Map2Normal)
108 set_active_eval2( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map2Normal );
109
110 if (ctx->Eval.Map1Vertex4)
111 set_active_eval1( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map1Vertex4 );
112 else if (ctx->Eval.Map1Vertex3)
113 set_active_eval1( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map1Vertex3 );
114
115 if (ctx->Eval.Map2Vertex4)
116 set_active_eval2( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map2Vertex4 );
117 else if (ctx->Eval.Map2Vertex3)
118 set_active_eval2( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map2Vertex3 );
119
120 /* _NEW_PROGRAM */
121 if (ctx->VertexProgram._Enabled) {
122 /* These are the 16 evaluators which GL_NV_vertex_program defines.
123 * They alias and override the conventional vertex attributs.
124 */
125 for (attr = 0; attr < 16; attr++) {
126 /* _NEW_EVAL */
127 assert(attr < Elements(ctx->Eval.Map1Attrib));
128 if (ctx->Eval.Map1Attrib[attr])
129 set_active_eval1( exec, attr, 4, &ctx->EvalMap.Map1Attrib[attr] );
130
131 assert(attr < Elements(ctx->Eval.Map2Attrib));
132 if (ctx->Eval.Map2Attrib[attr])
133 set_active_eval2( exec, attr, 4, &ctx->EvalMap.Map2Attrib[attr] );
134 }
135 }
136
137 exec->eval.recalculate_maps = 0;
138 }
139
140
141
vbo_exec_do_EvalCoord1f(struct vbo_exec_context * exec,GLfloat u)142 void vbo_exec_do_EvalCoord1f(struct vbo_exec_context *exec, GLfloat u)
143 {
144 GLuint attr;
145
146 for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
147 struct gl_1d_map *map = exec->eval.map1[attr].map;
148 if (map) {
149 GLfloat uu = (u - map->u1) * map->du;
150 GLfloat data[4];
151
152 ASSIGN_4V(data, 0, 0, 0, 1);
153
154 _math_horner_bezier_curve(map->Points, data, uu,
155 exec->eval.map1[attr].sz,
156 map->Order);
157
158 COPY_SZ_4V( exec->vtx.attrptr[attr],
159 exec->vtx.attrsz[attr],
160 data );
161 }
162 }
163
164 /** Vertex -- EvalCoord1f is a noop if this map not enabled:
165 **/
166 if (exec->eval.map1[0].map) {
167 struct gl_1d_map *map = exec->eval.map1[0].map;
168 GLfloat uu = (u - map->u1) * map->du;
169 GLfloat vertex[4];
170
171 ASSIGN_4V(vertex, 0, 0, 0, 1);
172
173 _math_horner_bezier_curve(map->Points, vertex, uu,
174 exec->eval.map1[0].sz,
175 map->Order);
176
177 if (exec->eval.map1[0].sz == 4)
178 CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
179 else
180 CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
181 }
182 }
183
184
185
vbo_exec_do_EvalCoord2f(struct vbo_exec_context * exec,GLfloat u,GLfloat v)186 void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
187 GLfloat u, GLfloat v )
188 {
189 GLuint attr;
190
191 for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
192 struct gl_2d_map *map = exec->eval.map2[attr].map;
193 if (map) {
194 GLfloat uu = (u - map->u1) * map->du;
195 GLfloat vv = (v - map->v1) * map->dv;
196 GLfloat data[4];
197
198 ASSIGN_4V(data, 0, 0, 0, 1);
199
200 _math_horner_bezier_surf(map->Points,
201 data,
202 uu, vv,
203 exec->eval.map2[attr].sz,
204 map->Uorder, map->Vorder);
205
206 COPY_SZ_4V( exec->vtx.attrptr[attr],
207 exec->vtx.attrsz[attr],
208 data );
209 }
210 }
211
212 /** Vertex -- EvalCoord2f is a noop if this map not enabled:
213 **/
214 if (exec->eval.map2[0].map) {
215 struct gl_2d_map *map = exec->eval.map2[0].map;
216 GLfloat uu = (u - map->u1) * map->du;
217 GLfloat vv = (v - map->v1) * map->dv;
218 GLfloat vertex[4];
219
220 ASSIGN_4V(vertex, 0, 0, 0, 1);
221
222 if (exec->ctx->Eval.AutoNormal) {
223 GLfloat normal[4];
224 GLfloat du[4], dv[4];
225
226 _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
227 exec->eval.map2[0].sz,
228 map->Uorder, map->Vorder);
229
230 if (exec->eval.map2[0].sz == 4) {
231 du[0] = du[0]*vertex[3] - du[3]*vertex[0];
232 du[1] = du[1]*vertex[3] - du[3]*vertex[1];
233 du[2] = du[2]*vertex[3] - du[3]*vertex[2];
234
235 dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
236 dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
237 dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
238 }
239
240
241 CROSS3(normal, du, dv);
242 NORMALIZE_3FV(normal);
243 normal[3] = 1.0;
244
245 COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
246 exec->vtx.attrsz[VBO_ATTRIB_NORMAL],
247 normal );
248
249 }
250 else {
251 _math_horner_bezier_surf(map->Points, vertex, uu, vv,
252 exec->eval.map2[0].sz,
253 map->Uorder, map->Vorder);
254 }
255
256 if (exec->vtx.attrsz[0] == 4)
257 CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
258 else
259 CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
260 }
261 }
262
263
264