2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 * glTexGen-related functions
33 #include "main/glheader.h"
34 #include "main/context.h"
35 #include "main/enums.h"
36 #include "main/macros.h"
37 #include "main/texgen.h"
38 #include "main/texstate.h"
39 #include "math/m_matrix.h"
40 #include "glapi/dispatch.h"
47 * Return texgen state for given coordinate
49 static struct gl_texgen
*
50 get_texgen(struct gl_texture_unit
*texUnit
, GLenum coord
)
54 return &texUnit
->GenS
;
56 return &texUnit
->GenT
;
58 return &texUnit
->GenR
;
60 return &texUnit
->GenQ
;
68 _mesa_TexGenfv( GLenum coord
, GLenum pname
, const GLfloat
*params
)
70 struct gl_texture_unit
*texUnit
;
71 struct gl_texgen
*texgen
;
72 GET_CURRENT_CONTEXT(ctx
);
73 ASSERT_OUTSIDE_BEGIN_END(ctx
);
75 if (MESA_VERBOSE
&(VERBOSE_API
|VERBOSE_TEXTURE
))
76 _mesa_debug(ctx
, "glTexGen %s %s %.1f(%s)...\n",
77 _mesa_lookup_enum_by_nr(coord
),
78 _mesa_lookup_enum_by_nr(pname
),
80 _mesa_lookup_enum_by_nr((GLenum
) (GLint
) *params
));
82 if (ctx
->Texture
.CurrentUnit
>= ctx
->Const
.MaxTextureCoordUnits
) {
83 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glTexGen(current unit)");
87 texUnit
= _mesa_get_current_tex_unit(ctx
);
89 texgen
= get_texgen(texUnit
, coord
);
91 _mesa_error(ctx
, GL_INVALID_ENUM
, "glTexGen(coord)");
96 case GL_TEXTURE_GEN_MODE
:
98 GLenum mode
= (GLenum
) (GLint
) params
[0];
100 if (texgen
->Mode
== mode
)
103 case GL_OBJECT_LINEAR
:
104 bit
= TEXGEN_OBJ_LINEAR
;
107 bit
= TEXGEN_EYE_LINEAR
;
110 if (coord
== GL_S
|| coord
== GL_T
)
111 bit
= TEXGEN_SPHERE_MAP
;
113 case GL_REFLECTION_MAP_NV
:
115 bit
= TEXGEN_REFLECTION_MAP_NV
;
117 case GL_NORMAL_MAP_NV
:
119 bit
= TEXGEN_NORMAL_MAP_NV
;
125 _mesa_error( ctx
, GL_INVALID_ENUM
, "glTexGenfv(param)" );
128 FLUSH_VERTICES(ctx
, _NEW_TEXTURE
);
130 texgen
->_ModeBit
= bit
;
134 case GL_OBJECT_PLANE
:
136 if (TEST_EQ_4V(texgen
->ObjectPlane
, params
))
138 FLUSH_VERTICES(ctx
, _NEW_TEXTURE
);
139 COPY_4FV(texgen
->ObjectPlane
, params
);
146 /* Transform plane equation by the inverse modelview matrix */
147 if (_math_matrix_is_dirty(ctx
->ModelviewMatrixStack
.Top
)) {
148 _math_matrix_analyse(ctx
->ModelviewMatrixStack
.Top
);
150 _mesa_transform_vector(tmp
, params
,
151 ctx
->ModelviewMatrixStack
.Top
->inv
);
152 if (TEST_EQ_4V(texgen
->EyePlane
, tmp
))
154 FLUSH_VERTICES(ctx
, _NEW_TEXTURE
);
155 COPY_4FV(texgen
->EyePlane
, tmp
);
160 _mesa_error( ctx
, GL_INVALID_ENUM
, "glTexGenfv(pname)" );
164 if (ctx
->Driver
.TexGen
)
165 ctx
->Driver
.TexGen( ctx
, coord
, pname
, params
);
169 static void GLAPIENTRY
170 _mesa_TexGeniv(GLenum coord
, GLenum pname
, const GLint
*params
)
173 p
[0] = (GLfloat
) params
[0];
174 if (pname
== GL_TEXTURE_GEN_MODE
) {
175 p
[1] = p
[2] = p
[3] = 0.0F
;
178 p
[1] = (GLfloat
) params
[1];
179 p
[2] = (GLfloat
) params
[2];
180 p
[3] = (GLfloat
) params
[3];
182 _mesa_TexGenfv(coord
, pname
, p
);
186 static void GLAPIENTRY
187 _mesa_TexGend(GLenum coord
, GLenum pname
, GLdouble param
)
189 GLfloat p
= (GLfloat
) param
;
190 _mesa_TexGenfv( coord
, pname
, &p
);
194 static void GLAPIENTRY
195 _mesa_TexGendv(GLenum coord
, GLenum pname
, const GLdouble
*params
)
198 p
[0] = (GLfloat
) params
[0];
199 if (pname
== GL_TEXTURE_GEN_MODE
) {
200 p
[1] = p
[2] = p
[3] = 0.0F
;
203 p
[1] = (GLfloat
) params
[1];
204 p
[2] = (GLfloat
) params
[2];
205 p
[3] = (GLfloat
) params
[3];
207 _mesa_TexGenfv( coord
, pname
, p
);
211 static void GLAPIENTRY
212 _mesa_TexGenf( GLenum coord
, GLenum pname
, GLfloat param
)
216 p
[1] = p
[2] = p
[3] = 0.0F
;
217 _mesa_TexGenfv(coord
, pname
, p
);
222 _mesa_TexGeni( GLenum coord
, GLenum pname
, GLint param
)
226 p
[1] = p
[2] = p
[3] = 0;
227 _mesa_TexGeniv( coord
, pname
, p
);
232 static void GLAPIENTRY
233 _mesa_GetTexGendv( GLenum coord
, GLenum pname
, GLdouble
*params
)
235 struct gl_texture_unit
*texUnit
;
236 struct gl_texgen
*texgen
;
237 GET_CURRENT_CONTEXT(ctx
);
238 ASSERT_OUTSIDE_BEGIN_END(ctx
);
240 if (ctx
->Texture
.CurrentUnit
>= ctx
->Const
.MaxTextureCoordUnits
) {
241 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexGendv(current unit)");
245 texUnit
= _mesa_get_current_tex_unit(ctx
);
247 texgen
= get_texgen(texUnit
, coord
);
249 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexGendv(coord)");
254 case GL_TEXTURE_GEN_MODE
:
255 params
[0] = ENUM_TO_DOUBLE(texgen
->Mode
);
257 case GL_OBJECT_PLANE
:
258 COPY_4V(params
, texgen
->ObjectPlane
);
261 COPY_4V(params
, texgen
->EyePlane
);
264 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexGendv(pname)" );
270 static void GLAPIENTRY
271 _mesa_GetTexGenfv( GLenum coord
, GLenum pname
, GLfloat
*params
)
273 struct gl_texture_unit
*texUnit
;
274 struct gl_texgen
*texgen
;
275 GET_CURRENT_CONTEXT(ctx
);
276 ASSERT_OUTSIDE_BEGIN_END(ctx
);
278 if (ctx
->Texture
.CurrentUnit
>= ctx
->Const
.MaxTextureCoordUnits
) {
279 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexGenfv(current unit)");
283 texUnit
= _mesa_get_current_tex_unit(ctx
);
285 texgen
= get_texgen(texUnit
, coord
);
287 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexGenfv(coord)");
292 case GL_TEXTURE_GEN_MODE
:
293 params
[0] = ENUM_TO_FLOAT(texgen
->Mode
);
295 case GL_OBJECT_PLANE
:
296 COPY_4V(params
, texgen
->ObjectPlane
);
299 COPY_4V(params
, texgen
->EyePlane
);
302 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexGenfv(pname)" );
308 static void GLAPIENTRY
309 _mesa_GetTexGeniv( GLenum coord
, GLenum pname
, GLint
*params
)
311 struct gl_texture_unit
*texUnit
;
312 struct gl_texgen
*texgen
;
313 GET_CURRENT_CONTEXT(ctx
);
314 ASSERT_OUTSIDE_BEGIN_END(ctx
);
316 if (ctx
->Texture
.CurrentUnit
>= ctx
->Const
.MaxTextureCoordUnits
) {
317 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glGetTexGeniv(current unit)");
321 texUnit
= _mesa_get_current_tex_unit(ctx
);
323 texgen
= get_texgen(texUnit
, coord
);
325 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetTexGeniv(coord)");
330 case GL_TEXTURE_GEN_MODE
:
331 params
[0] = texgen
->Mode
;
333 case GL_OBJECT_PLANE
:
334 params
[0] = (GLint
) texgen
->ObjectPlane
[0];
335 params
[1] = (GLint
) texgen
->ObjectPlane
[1];
336 params
[2] = (GLint
) texgen
->ObjectPlane
[2];
337 params
[3] = (GLint
) texgen
->ObjectPlane
[3];
340 params
[0] = (GLint
) texgen
->EyePlane
[0];
341 params
[1] = (GLint
) texgen
->EyePlane
[1];
342 params
[2] = (GLint
) texgen
->EyePlane
[2];
343 params
[3] = (GLint
) texgen
->EyePlane
[3];
346 _mesa_error( ctx
, GL_INVALID_ENUM
, "glGetTexGeniv(pname)" );
352 _mesa_init_texgen_dispatch(struct _glapi_table
*disp
)
354 SET_GetTexGendv(disp
, _mesa_GetTexGendv
);
355 SET_GetTexGenfv(disp
, _mesa_GetTexGenfv
);
356 SET_GetTexGeniv(disp
, _mesa_GetTexGeniv
);
357 SET_TexGend(disp
, _mesa_TexGend
);
358 SET_TexGendv(disp
, _mesa_TexGendv
);
359 SET_TexGenf(disp
, _mesa_TexGenf
);
360 SET_TexGenfv(disp
, _mesa_TexGenfv
);
361 SET_TexGeni(disp
, _mesa_TexGeni
);
362 SET_TexGeniv(disp
, _mesa_TexGeniv
);
366 #endif /* FEATURE_texgen */