2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
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:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
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.
25 * Keith Whitwell <keith@tungstengraphics.com>
32 #include "math/m_eval.h"
33 #include "t_vtx_api.h"
36 static void clear_active_eval1( TNLcontext
*tnl
, GLuint attr
)
38 tnl
->vtx
.eval
.map1
[attr
].map
= 0;
41 static void clear_active_eval2( TNLcontext
*tnl
, GLuint attr
)
43 tnl
->vtx
.eval
.map2
[attr
].map
= 0;
46 static void set_active_eval1( TNLcontext
*tnl
, GLuint attr
, GLuint dim
,
47 struct gl_1d_map
*map
)
49 if (!tnl
->vtx
.eval
.map1
[attr
].map
) {
50 tnl
->vtx
.eval
.map1
[attr
].map
= map
;
51 tnl
->vtx
.eval
.map1
[attr
].sz
= dim
;
55 static void set_active_eval2( TNLcontext
*tnl
, GLuint attr
, GLuint dim
,
56 struct gl_2d_map
*map
)
58 if (!tnl
->vtx
.eval
.map2
[attr
].map
) {
59 tnl
->vtx
.eval
.map2
[attr
].map
= map
;
60 tnl
->vtx
.eval
.map2
[attr
].sz
= dim
;
64 void _tnl_update_eval( GLcontext
*ctx
)
66 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
69 /* Vertex program maps have priority over conventional attribs */
71 for (attr
= 0; attr
< VERT_ATTRIB_MAX
; attr
++) {
72 clear_active_eval1( tnl
, attr
);
73 clear_active_eval2( tnl
, attr
);
76 if (ctx
->VertexProgram
._Enabled
) {
77 for (attr
= 0; attr
< VERT_ATTRIB_MAX
; attr
++) {
78 if (ctx
->Eval
.Map1Attrib
[attr
])
79 set_active_eval1( tnl
, attr
, 4, &ctx
->EvalMap
.Map1Attrib
[attr
] );
81 if (ctx
->Eval
.Map2Attrib
[attr
])
82 set_active_eval2( tnl
, attr
, 4, &ctx
->EvalMap
.Map2Attrib
[attr
] );
86 if (ctx
->Eval
.Map1Color4
)
87 set_active_eval1( tnl
, VERT_ATTRIB_COLOR0
, 4, &ctx
->EvalMap
.Map1Color4
);
89 if (ctx
->Eval
.Map2Color4
)
90 set_active_eval2( tnl
, VERT_ATTRIB_COLOR0
, 4, &ctx
->EvalMap
.Map2Color4
);
92 if (ctx
->Eval
.Map1TextureCoord4
)
93 set_active_eval1( tnl
, VERT_ATTRIB_TEX0
, 4, &ctx
->EvalMap
.Map1Texture4
);
94 else if (ctx
->Eval
.Map1TextureCoord3
)
95 set_active_eval1( tnl
, VERT_ATTRIB_TEX0
, 3, &ctx
->EvalMap
.Map1Texture3
);
96 else if (ctx
->Eval
.Map1TextureCoord2
)
97 set_active_eval1( tnl
, VERT_ATTRIB_TEX0
, 2, &ctx
->EvalMap
.Map1Texture2
);
98 else if (ctx
->Eval
.Map1TextureCoord1
)
99 set_active_eval1( tnl
, VERT_ATTRIB_TEX0
, 1, &ctx
->EvalMap
.Map1Texture1
);
101 if (ctx
->Eval
.Map2TextureCoord4
)
102 set_active_eval2( tnl
, VERT_ATTRIB_TEX0
, 4, &ctx
->EvalMap
.Map2Texture4
);
103 else if (ctx
->Eval
.Map2TextureCoord3
)
104 set_active_eval2( tnl
, VERT_ATTRIB_TEX0
, 3, &ctx
->EvalMap
.Map2Texture3
);
105 else if (ctx
->Eval
.Map2TextureCoord2
)
106 set_active_eval2( tnl
, VERT_ATTRIB_TEX0
, 2, &ctx
->EvalMap
.Map2Texture2
);
107 else if (ctx
->Eval
.Map2TextureCoord1
)
108 set_active_eval2( tnl
, VERT_ATTRIB_TEX0
, 1, &ctx
->EvalMap
.Map2Texture1
);
110 if (ctx
->Eval
.Map1Normal
)
111 set_active_eval1( tnl
, VERT_ATTRIB_NORMAL
, 3, &ctx
->EvalMap
.Map1Normal
);
113 if (ctx
->Eval
.Map2Normal
)
114 set_active_eval2( tnl
, VERT_ATTRIB_NORMAL
, 3, &ctx
->EvalMap
.Map2Normal
);
116 if (ctx
->Eval
.Map1Vertex4
)
117 set_active_eval1( tnl
, VERT_ATTRIB_POS
, 4, &ctx
->EvalMap
.Map1Vertex4
);
118 else if (ctx
->Eval
.Map1Vertex3
)
119 set_active_eval1( tnl
, VERT_ATTRIB_POS
, 3, &ctx
->EvalMap
.Map1Vertex3
);
121 if (ctx
->Eval
.Map2Vertex4
)
122 set_active_eval2( tnl
, VERT_ATTRIB_POS
, 4, &ctx
->EvalMap
.Map2Vertex4
);
123 else if (ctx
->Eval
.Map2Vertex3
)
124 set_active_eval2( tnl
, VERT_ATTRIB_POS
, 3, &ctx
->EvalMap
.Map2Vertex3
);
126 tnl
->vtx
.eval
.new_state
= 0;
131 void _tnl_do_EvalCoord1f(GLcontext
* ctx
, GLfloat u
)
133 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
136 for (attr
= 1; attr
<= _TNL_ATTRIB_INDEX
; attr
++) {
137 struct gl_1d_map
*map
= tnl
->vtx
.eval
.map1
[attr
].map
;
139 GLfloat uu
= (u
- map
->u1
) * map
->du
;
142 ASSIGN_4V(data
, 0, 0, 0, 1);
144 _math_horner_bezier_curve(map
->Points
, data
, uu
,
145 tnl
->vtx
.eval
.map1
[attr
].sz
,
148 COPY_SZ_4V( tnl
->vtx
.attrptr
[attr
],
149 tnl
->vtx
.attrsz
[attr
],
154 /** Vertex -- EvalCoord1f is a noop if this map not enabled:
156 if (tnl
->vtx
.eval
.map1
[0].map
) {
157 struct gl_1d_map
*map
= tnl
->vtx
.eval
.map1
[0].map
;
158 GLfloat uu
= (u
- map
->u1
) * map
->du
;
161 ASSIGN_4V(vertex
, 0, 0, 0, 1);
163 _math_horner_bezier_curve(map
->Points
, vertex
, uu
,
164 tnl
->vtx
.eval
.map1
[0].sz
,
167 if (tnl
->vtx
.eval
.map1
[0].sz
== 4)
168 GL_CALL(Vertex4fv
)( vertex
);
170 GL_CALL(Vertex3fv
)( vertex
);
176 void _tnl_do_EvalCoord2f( GLcontext
* ctx
, GLfloat u
, GLfloat v
)
178 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
181 for (attr
= 1; attr
<= _TNL_ATTRIB_INDEX
; attr
++) {
182 struct gl_2d_map
*map
= tnl
->vtx
.eval
.map2
[attr
].map
;
184 GLfloat uu
= (u
- map
->u1
) * map
->du
;
185 GLfloat vv
= (v
- map
->v1
) * map
->dv
;
188 ASSIGN_4V(data
, 0, 0, 0, 1);
190 _math_horner_bezier_surf(map
->Points
,
193 tnl
->vtx
.eval
.map2
[attr
].sz
,
194 map
->Uorder
, map
->Vorder
);
196 COPY_SZ_4V( tnl
->vtx
.attrptr
[attr
],
197 tnl
->vtx
.attrsz
[attr
],
202 /** Vertex -- EvalCoord2f is a noop if this map not enabled:
204 if (tnl
->vtx
.eval
.map2
[0].map
) {
205 struct gl_2d_map
*map
= tnl
->vtx
.eval
.map2
[0].map
;
206 GLfloat uu
= (u
- map
->u1
) * map
->du
;
207 GLfloat vv
= (v
- map
->v1
) * map
->dv
;
210 ASSIGN_4V(vertex
, 0, 0, 0, 1);
212 if (ctx
->Eval
.AutoNormal
) {
214 GLfloat du
[4], dv
[4];
216 _math_de_casteljau_surf(map
->Points
, vertex
, du
, dv
, uu
, vv
,
217 tnl
->vtx
.eval
.map2
[0].sz
,
218 map
->Uorder
, map
->Vorder
);
220 if (tnl
->vtx
.eval
.map2
[0].sz
== 4) {
221 du
[0] = du
[0]*vertex
[3] - du
[3]*vertex
[0];
222 du
[1] = du
[1]*vertex
[3] - du
[3]*vertex
[1];
223 du
[2] = du
[2]*vertex
[3] - du
[3]*vertex
[2];
225 dv
[0] = dv
[0]*vertex
[3] - dv
[3]*vertex
[0];
226 dv
[1] = dv
[1]*vertex
[3] - dv
[3]*vertex
[1];
227 dv
[2] = dv
[2]*vertex
[3] - dv
[3]*vertex
[2];
231 CROSS3(normal
, du
, dv
);
232 NORMALIZE_3FV(normal
);
235 COPY_SZ_4V( tnl
->vtx
.attrptr
[_TNL_ATTRIB_NORMAL
],
236 tnl
->vtx
.attrsz
[_TNL_ATTRIB_NORMAL
],
241 _math_horner_bezier_surf(map
->Points
, vertex
, uu
, vv
,
242 tnl
->vtx
.eval
.map2
[0].sz
,
243 map
->Uorder
, map
->Vorder
);
246 if (tnl
->vtx
.attrsz
[0] == 4)
247 GL_CALL(Vertex4fv
)( vertex
);
249 GL_CALL(Vertex3fv
)( vertex
);