2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
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:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
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.
25 * Keith Whitwell <keithw@vmware.com>
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"
36 static void clear_active_eval1( struct vbo_exec_context
*exec
, GLuint attr
)
38 assert(attr
< ARRAY_SIZE(exec
->eval
.map1
));
39 exec
->eval
.map1
[attr
].map
= NULL
;
42 static void clear_active_eval2( struct vbo_exec_context
*exec
, GLuint attr
)
44 assert(attr
< ARRAY_SIZE(exec
->eval
.map2
));
45 exec
->eval
.map2
[attr
].map
= NULL
;
48 static void set_active_eval1( struct vbo_exec_context
*exec
, GLuint attr
, GLuint dim
,
49 struct gl_1d_map
*map
)
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
;
58 static void set_active_eval2( struct vbo_exec_context
*exec
, GLuint attr
, GLuint dim
,
59 struct gl_2d_map
*map
)
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
;
68 void vbo_exec_eval_update( struct vbo_exec_context
*exec
)
70 struct gl_context
*ctx
= exec
->ctx
;
73 /* Vertex program maps have priority over conventional attribs */
75 for (attr
= 0; attr
< VBO_ATTRIB_FIRST_MATERIAL
; attr
++) {
76 clear_active_eval1( exec
, attr
);
77 clear_active_eval2( exec
, attr
);
80 if (ctx
->Eval
.Map1Color4
)
81 set_active_eval1( exec
, VBO_ATTRIB_COLOR0
, 4, &ctx
->EvalMap
.Map1Color4
);
83 if (ctx
->Eval
.Map2Color4
)
84 set_active_eval2( exec
, VBO_ATTRIB_COLOR0
, 4, &ctx
->EvalMap
.Map2Color4
);
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
);
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
);
104 if (ctx
->Eval
.Map1Normal
)
105 set_active_eval1( exec
, VBO_ATTRIB_NORMAL
, 3, &ctx
->EvalMap
.Map1Normal
);
107 if (ctx
->Eval
.Map2Normal
)
108 set_active_eval2( exec
, VBO_ATTRIB_NORMAL
, 3, &ctx
->EvalMap
.Map2Normal
);
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
);
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
);
120 exec
->eval
.recalculate_maps
= GL_FALSE
;
125 void vbo_exec_do_EvalCoord1f(struct vbo_exec_context
*exec
, GLfloat u
)
129 for (attr
= 1; attr
<= VBO_ATTRIB_TEX7
; attr
++) {
130 struct gl_1d_map
*map
= exec
->eval
.map1
[attr
].map
;
132 GLfloat uu
= (u
- map
->u1
) * map
->du
;
135 ASSIGN_4V(data
, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
136 FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
138 _math_horner_bezier_curve(map
->Points
, &data
[0].f
, uu
,
139 exec
->eval
.map1
[attr
].sz
,
142 COPY_SZ_4V( exec
->vtx
.attrptr
[attr
],
143 exec
->vtx
.attr
[attr
].size
,
148 /** Vertex -- EvalCoord1f is a noop if this map not enabled:
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
;
155 ASSIGN_4V(vertex
, 0, 0, 0, 1);
157 _math_horner_bezier_curve(map
->Points
, vertex
, uu
,
158 exec
->eval
.map1
[0].sz
,
161 if (exec
->eval
.map1
[0].sz
== 4)
162 CALL_Vertex4fv(GET_DISPATCH(), ( vertex
));
164 CALL_Vertex3fv(GET_DISPATCH(), ( vertex
));
170 void vbo_exec_do_EvalCoord2f( struct vbo_exec_context
*exec
,
171 GLfloat u
, GLfloat v
)
175 for (attr
= 1; attr
<= VBO_ATTRIB_TEX7
; attr
++) {
176 struct gl_2d_map
*map
= exec
->eval
.map2
[attr
].map
;
178 GLfloat uu
= (u
- map
->u1
) * map
->du
;
179 GLfloat vv
= (v
- map
->v1
) * map
->dv
;
182 ASSIGN_4V(data
, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
183 FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
185 _math_horner_bezier_surf(map
->Points
,
188 exec
->eval
.map2
[attr
].sz
,
189 map
->Uorder
, map
->Vorder
);
191 COPY_SZ_4V( exec
->vtx
.attrptr
[attr
],
192 exec
->vtx
.attr
[attr
].size
,
197 /** Vertex -- EvalCoord2f is a noop if this map not enabled:
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
;
205 ASSIGN_4V(vertex
, 0, 0, 0, 1);
207 if (exec
->ctx
->Eval
.AutoNormal
) {
209 GLfloat du
[4], dv
[4];
211 _math_de_casteljau_surf(map
->Points
, vertex
, du
, dv
, uu
, vv
,
212 exec
->eval
.map2
[0].sz
,
213 map
->Uorder
, map
->Vorder
);
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];
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];
226 CROSS3(&normal
[0].f
, du
, dv
);
227 NORMALIZE_3FV(&normal
[0].f
);
228 normal
[3] = FLOAT_AS_UNION(1.0);
230 COPY_SZ_4V( exec
->vtx
.attrptr
[VBO_ATTRIB_NORMAL
],
231 exec
->vtx
.attr
[VBO_ATTRIB_NORMAL
].size
,
236 _math_horner_bezier_surf(map
->Points
, vertex
, uu
, vv
,
237 exec
->eval
.map2
[0].sz
,
238 map
->Uorder
, map
->Vorder
);
241 if (exec
->vtx
.attr
[VBO_ATTRIB_POS
].size
== 4)
242 CALL_Vertex4fv(GET_DISPATCH(), ( vertex
));
244 CALL_Vertex3fv(GET_DISPATCH(), ( vertex
));