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 #include "vbo_private.h"
35 
36 
clear_active_eval1(struct vbo_exec_context * exec,GLuint attr)37 static void clear_active_eval1( struct vbo_exec_context *exec, GLuint attr )
38 {
39    assert(attr < ARRAY_SIZE(exec->eval.map1));
40    exec->eval.map1[attr].map = NULL;
41 }
42 
clear_active_eval2(struct vbo_exec_context * exec,GLuint attr)43 static void clear_active_eval2( struct vbo_exec_context *exec, GLuint attr )
44 {
45    assert(attr < ARRAY_SIZE(exec->eval.map2));
46    exec->eval.map2[attr].map = NULL;
47 }
48 
set_active_eval1(struct vbo_exec_context * exec,GLuint attr,GLuint dim,struct gl_1d_map * map)49 static void set_active_eval1( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
50 			      struct gl_1d_map *map )
51 {
52    assert(attr < ARRAY_SIZE(exec->eval.map1));
53    if (!exec->eval.map1[attr].map) {
54       exec->eval.map1[attr].map = map;
55       exec->eval.map1[attr].sz = dim;
56    }
57 }
58 
set_active_eval2(struct vbo_exec_context * exec,GLuint attr,GLuint dim,struct gl_2d_map * map)59 static void set_active_eval2( struct vbo_exec_context *exec, GLuint attr, GLuint dim,
60 			      struct gl_2d_map *map )
61 {
62    assert(attr < ARRAY_SIZE(exec->eval.map2));
63    if (!exec->eval.map2[attr].map) {
64       exec->eval.map2[attr].map = map;
65       exec->eval.map2[attr].sz = dim;
66    }
67 }
68 
vbo_exec_eval_update(struct vbo_exec_context * exec)69 void vbo_exec_eval_update( struct vbo_exec_context *exec )
70 {
71    struct gl_context *ctx = gl_context_from_vbo_exec(exec);
72    GLuint attr;
73 
74    /* Vertex program maps have priority over conventional attribs */
75 
76    for (attr = 0; attr < VBO_ATTRIB_FIRST_MATERIAL; attr++) {
77       clear_active_eval1( exec, attr );
78       clear_active_eval2( exec, attr );
79    }
80 
81    if (ctx->Eval.Map1Color4)
82       set_active_eval1( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map1Color4 );
83 
84    if (ctx->Eval.Map2Color4)
85       set_active_eval2( exec, VBO_ATTRIB_COLOR0, 4, &ctx->EvalMap.Map2Color4 );
86 
87    if (ctx->Eval.Map1TextureCoord4)
88       set_active_eval1( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map1Texture4 );
89    else if (ctx->Eval.Map1TextureCoord3)
90       set_active_eval1( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map1Texture3 );
91    else if (ctx->Eval.Map1TextureCoord2)
92       set_active_eval1( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map1Texture2 );
93    else if (ctx->Eval.Map1TextureCoord1)
94       set_active_eval1( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map1Texture1 );
95 
96    if (ctx->Eval.Map2TextureCoord4)
97       set_active_eval2( exec, VBO_ATTRIB_TEX0, 4, &ctx->EvalMap.Map2Texture4 );
98    else if (ctx->Eval.Map2TextureCoord3)
99       set_active_eval2( exec, VBO_ATTRIB_TEX0, 3, &ctx->EvalMap.Map2Texture3 );
100    else if (ctx->Eval.Map2TextureCoord2)
101       set_active_eval2( exec, VBO_ATTRIB_TEX0, 2, &ctx->EvalMap.Map2Texture2 );
102    else if (ctx->Eval.Map2TextureCoord1)
103       set_active_eval2( exec, VBO_ATTRIB_TEX0, 1, &ctx->EvalMap.Map2Texture1 );
104 
105    if (ctx->Eval.Map1Normal)
106       set_active_eval1( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map1Normal );
107 
108    if (ctx->Eval.Map2Normal)
109       set_active_eval2( exec, VBO_ATTRIB_NORMAL, 3, &ctx->EvalMap.Map2Normal );
110 
111    if (ctx->Eval.Map1Vertex4)
112       set_active_eval1( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map1Vertex4 );
113    else if (ctx->Eval.Map1Vertex3)
114       set_active_eval1( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map1Vertex3 );
115 
116    if (ctx->Eval.Map2Vertex4)
117       set_active_eval2( exec, VBO_ATTRIB_POS, 4, &ctx->EvalMap.Map2Vertex4 );
118    else if (ctx->Eval.Map2Vertex3)
119       set_active_eval2( exec, VBO_ATTRIB_POS, 3, &ctx->EvalMap.Map2Vertex3 );
120 
121    exec->eval.recalculate_maps = GL_FALSE;
122 }
123 
124 
125 
vbo_exec_do_EvalCoord1f(struct vbo_exec_context * exec,GLfloat u)126 void vbo_exec_do_EvalCoord1f(struct vbo_exec_context *exec, GLfloat u)
127 {
128    struct gl_context *ctx = gl_context_from_vbo_exec(exec);
129    GLuint attr;
130 
131    for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
132       struct gl_1d_map *map = exec->eval.map1[attr].map;
133       if (map) {
134 	 GLfloat uu = (u - map->u1) * map->du;
135 	 fi_type data[4];
136 
137 	 ASSIGN_4V(data, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
138 		   FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
139 
140 	 _math_horner_bezier_curve(map->Points, &data[0].f, uu,
141 				   exec->eval.map1[attr].sz,
142 				   map->Order);
143 
144 	 COPY_SZ_4V( exec->vtx.attrptr[attr],
145 		     exec->vtx.attr[attr].size,
146 		     data );
147       }
148    }
149 
150    /** Vertex -- EvalCoord1f is a noop if this map not enabled:
151     **/
152    if (exec->eval.map1[0].map) {
153       struct gl_1d_map *map = exec->eval.map1[0].map;
154       GLfloat uu = (u - map->u1) * map->du;
155       GLfloat vertex[4];
156 
157       ASSIGN_4V(vertex, 0, 0, 0, 1);
158 
159       _math_horner_bezier_curve(map->Points, vertex, uu,
160 				exec->eval.map1[0].sz,
161 				map->Order);
162 
163       if (exec->eval.map1[0].sz == 4)
164 	 CALL_Vertex4fv(ctx->CurrentServerDispatch, ( vertex ));
165       else
166 	 CALL_Vertex3fv(ctx->CurrentServerDispatch, ( vertex ));
167    }
168 }
169 
170 
171 
vbo_exec_do_EvalCoord2f(struct vbo_exec_context * exec,GLfloat u,GLfloat v)172 void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec,
173 			      GLfloat u, GLfloat v )
174 {
175    struct gl_context *ctx = gl_context_from_vbo_exec(exec);
176    GLuint attr;
177 
178    for (attr = 1; attr <= VBO_ATTRIB_TEX7; attr++) {
179       struct gl_2d_map *map = exec->eval.map2[attr].map;
180       if (map) {
181 	 GLfloat uu = (u - map->u1) * map->du;
182 	 GLfloat vv = (v - map->v1) * map->dv;
183 	 fi_type data[4];
184 
185 	 ASSIGN_4V(data, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
186 		   FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
187 
188 	 _math_horner_bezier_surf(map->Points,
189 				  &data[0].f,
190 				  uu, vv,
191 				  exec->eval.map2[attr].sz,
192 				  map->Uorder, map->Vorder);
193 
194 	 COPY_SZ_4V( exec->vtx.attrptr[attr],
195 		     exec->vtx.attr[attr].size,
196 		     data );
197       }
198    }
199 
200    /** Vertex -- EvalCoord2f is a noop if this map not enabled:
201     **/
202    if (exec->eval.map2[0].map) {
203       struct gl_2d_map *map = exec->eval.map2[0].map;
204       GLfloat uu = (u - map->u1) * map->du;
205       GLfloat vv = (v - map->v1) * map->dv;
206       GLfloat vertex[4];
207 
208       ASSIGN_4V(vertex, 0, 0, 0, 1);
209 
210       if (ctx->Eval.AutoNormal) {
211 	 fi_type normal[4];
212          GLfloat du[4], dv[4];
213 
214          _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
215 				 exec->eval.map2[0].sz,
216 				 map->Uorder, map->Vorder);
217 
218 	 if (exec->eval.map2[0].sz == 4) {
219 	    du[0] = du[0]*vertex[3] - du[3]*vertex[0];
220 	    du[1] = du[1]*vertex[3] - du[3]*vertex[1];
221 	    du[2] = du[2]*vertex[3] - du[3]*vertex[2];
222 
223 	    dv[0] = dv[0]*vertex[3] - dv[3]*vertex[0];
224 	    dv[1] = dv[1]*vertex[3] - dv[3]*vertex[1];
225 	    dv[2] = dv[2]*vertex[3] - dv[3]*vertex[2];
226 	 }
227 
228 
229          CROSS3(&normal[0].f, du, dv);
230          NORMALIZE_3FV(&normal[0].f);
231 	 normal[3] = FLOAT_AS_UNION(1.0);
232 
233  	 COPY_SZ_4V( exec->vtx.attrptr[VBO_ATTRIB_NORMAL],
234 		     exec->vtx.attr[VBO_ATTRIB_NORMAL].size,
235 		     normal );
236 
237       }
238       else {
239          _math_horner_bezier_surf(map->Points, vertex, uu, vv,
240 				  exec->eval.map2[0].sz,
241 				  map->Uorder, map->Vorder);
242       }
243 
244       if (exec->vtx.attr[VBO_ATTRIB_POS].size == 4)
245 	 CALL_Vertex4fv(ctx->CurrentServerDispatch, ( vertex ));
246       else
247 	 CALL_Vertex3fv(ctx->CurrentServerDispatch, ( vertex ));
248    }
249 }
250 
251 
252