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1 /*
2  * Mesa 3-D graphics library
3  *
4  * Copyright (C) 1999-2004  Brian Paul   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 "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included
14  * in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22  * OTHER DEALINGS IN THE SOFTWARE.
23  *
24  * Authors:
25  *    Keith Whitwell <keithw@vmware.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 < ARRAY_SIZE(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 < ARRAY_SIZE(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 < ARRAY_SIZE(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 < ARRAY_SIZE(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    exec->eval.recalculate_maps = GL_FALSE;
121 }
122 
123 
124 
vbo_exec_do_EvalCoord1f(struct vbo_exec_context * exec,GLfloat u)125 void vbo_exec_do_EvalCoord1f(struct vbo_exec_context *exec, GLfloat u)
126 {
127    GLuint attr;
128 
129    for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
130       struct gl_1d_map *map = exec->eval.map1[attr].map;
131       if (map) {
132 	 GLfloat uu = (u - map->u1) * map->du;
133 	 fi_type data[4];
134 
135 	 ASSIGN_4V(data, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
136 		   FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
137 
138 	 _math_horner_bezier_curve(map->Points, &data[0].f, uu,
139 				   exec->eval.map1[attr].sz,
140 				   map->Order);
141 
142 	 COPY_SZ_4V( exec->vtx.attrptr[attr],
143 		     exec->vtx.attrsz[attr],
144 		     data );
145       }
146    }
147 
148    /** Vertex -- EvalCoord1f is a noop if this map not enabled:
149     **/
150    if (exec->eval.map1[0].map) {
151       struct gl_1d_map *map = exec->eval.map1[0].map;
152       GLfloat uu = (u - map->u1) * map->du;
153       GLfloat vertex[4];
154 
155       ASSIGN_4V(vertex, 0, 0, 0, 1);
156 
157       _math_horner_bezier_curve(map->Points, vertex, uu,
158 				exec->eval.map1[0].sz,
159 				map->Order);
160 
161       if (exec->eval.map1[0].sz == 4)
162 	 CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
163       else
164 	 CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
165    }
166 }
167 
168 
169 
vbo_exec_do_EvalCoord2f(struct vbo_exec_context * exec,GLfloat u,GLfloat v)170 void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
171 			      GLfloat u, GLfloat v )
172 {
173    GLuint attr;
174 
175    for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
176       struct gl_2d_map *map = exec->eval.map2[attr].map;
177       if (map) {
178 	 GLfloat uu = (u - map->u1) * map->du;
179 	 GLfloat vv = (v - map->v1) * map->dv;
180 	 fi_type data[4];
181 
182 	 ASSIGN_4V(data, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
183 		   FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
184 
185 	 _math_horner_bezier_surf(map->Points,
186 				  &data[0].f,
187 				  uu, vv,
188 				  exec->eval.map2[attr].sz,
189 				  map->Uorder, map->Vorder);
190 
191 	 COPY_SZ_4V( exec->vtx.attrptr[attr],
192 		     exec->vtx.attrsz[attr],
193 		     data );
194       }
195    }
196 
197    /** Vertex -- EvalCoord2f is a noop if this map not enabled:
198     **/
199    if (exec->eval.map2[0].map) {
200       struct gl_2d_map *map = exec->eval.map2[0].map;
201       GLfloat uu = (u - map->u1) * map->du;
202       GLfloat vv = (v - map->v1) * map->dv;
203       GLfloat vertex[4];
204 
205       ASSIGN_4V(vertex, 0, 0, 0, 1);
206 
207       if (exec->ctx->Eval.AutoNormal) {
208 	 fi_type normal[4];
209          GLfloat du[4], dv[4];
210 
211          _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
212 				 exec->eval.map2[0].sz,
213 				 map->Uorder, map->Vorder);
214 
215 	 if (exec->eval.map2[0].sz == 4) {
216 	    du[0] = du[0]*vertex[3] - du[3]*vertex[0];
217 	    du[1] = du[1]*vertex[3] - du[3]*vertex[1];
218 	    du[2] = du[2]*vertex[3] - du[3]*vertex[2];
219 
220 	    dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
221 	    dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
222 	    dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
223 	 }
224 
225 
226          CROSS3(&normal[0].f, du, dv);
227          NORMALIZE_3FV(&normal[0].f);
228 	 normal[3] = FLOAT_AS_UNION(1.0);
229 
230  	 COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
231 		     exec->vtx.attrsz[VBO_ATTRIB_NORMAL],
232 		     normal );
233 
234       }
235       else {
236          _math_horner_bezier_surf(map->Points, vertex, uu, vv,
237 				  exec->eval.map2[0].sz,
238 				  map->Uorder, map->Vorder);
239       }
240 
241       if (exec->vtx.attrsz[0] == 4)
242 	 CALL_Vertex4fv(GET_DISPATCH(), ( vertex ));
243       else
244 	 CALL_Vertex3fv(GET_DISPATCH(), ( vertex ));
245    }
246 }
247 
248 
249