1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.5
4 *
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
7 *
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:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
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.
24 */
25
26 /**
27 * \file texgen.c
28 *
29 * glTexGen-related functions
30 */
31
32
33 #include "main/glheader.h"
34 #include "main/context.h"
35 #include "main/enums.h"
36 #include "main/macros.h"
37 #include "main/mfeatures.h"
38 #include "main/texgen.h"
39 #include "main/texstate.h"
40 #include "math/m_matrix.h"
41 #include "main/dispatch.h"
42
43
44 #if FEATURE_texgen
45
46
47 /**
48 * Return texgen state for given coordinate
49 */
50 static struct gl_texgen *
get_texgen(struct gl_context * ctx,struct gl_texture_unit * texUnit,GLenum coord)51 get_texgen(struct gl_context *ctx, struct gl_texture_unit *texUnit,
52 GLenum coord)
53 {
54 if (ctx->API == API_OPENGLES) {
55 return (coord == GL_TEXTURE_GEN_STR_OES)
56 ? &texUnit->GenS : NULL;
57 }
58
59 switch (coord) {
60 case GL_S:
61 return &texUnit->GenS;
62 case GL_T:
63 return &texUnit->GenT;
64 case GL_R:
65 return &texUnit->GenR;
66 case GL_Q:
67 return &texUnit->GenQ;
68 default:
69 return NULL;
70 }
71 }
72
73
74 void GLAPIENTRY
_mesa_TexGenfv(GLenum coord,GLenum pname,const GLfloat * params)75 _mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params )
76 {
77 struct gl_texture_unit *texUnit;
78 struct gl_texgen *texgen;
79 GET_CURRENT_CONTEXT(ctx);
80 ASSERT_OUTSIDE_BEGIN_END(ctx);
81
82 if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
83 _mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
84 _mesa_lookup_enum_by_nr(coord),
85 _mesa_lookup_enum_by_nr(pname),
86 *params,
87 _mesa_lookup_enum_by_nr((GLenum) (GLint) *params));
88
89 if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
90 _mesa_error(ctx, GL_INVALID_OPERATION, "glTexGen(current unit)");
91 return;
92 }
93
94 texUnit = _mesa_get_current_tex_unit(ctx);
95
96 texgen = get_texgen(ctx, texUnit, coord);
97 if (!texgen) {
98 _mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)");
99 return;
100 }
101
102 switch (pname) {
103 case GL_TEXTURE_GEN_MODE:
104 {
105 GLenum mode = (GLenum) (GLint) params[0];
106 GLbitfield bit = 0x0;
107 if (texgen->Mode == mode)
108 return;
109 switch (mode) {
110 case GL_OBJECT_LINEAR:
111 bit = TEXGEN_OBJ_LINEAR;
112 break;
113 case GL_EYE_LINEAR:
114 bit = TEXGEN_EYE_LINEAR;
115 break;
116 case GL_SPHERE_MAP:
117 if (coord == GL_S || coord == GL_T)
118 bit = TEXGEN_SPHERE_MAP;
119 break;
120 case GL_REFLECTION_MAP_NV:
121 if (coord != GL_Q)
122 bit = TEXGEN_REFLECTION_MAP_NV;
123 break;
124 case GL_NORMAL_MAP_NV:
125 if (coord != GL_Q)
126 bit = TEXGEN_NORMAL_MAP_NV;
127 break;
128 default:
129 ; /* nop */
130 }
131 if (!bit) {
132 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
133 return;
134 }
135 if (ctx->API != API_OPENGL
136 && (bit & (TEXGEN_REFLECTION_MAP_NV | TEXGEN_NORMAL_MAP_NV)) == 0) {
137 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
138 return;
139 }
140
141 FLUSH_VERTICES(ctx, _NEW_TEXTURE);
142 texgen->Mode = mode;
143 texgen->_ModeBit = bit;
144 }
145 break;
146
147 case GL_OBJECT_PLANE:
148 {
149 if (ctx->API != API_OPENGL) {
150 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
151 return;
152 }
153 if (TEST_EQ_4V(texgen->ObjectPlane, params))
154 return;
155 FLUSH_VERTICES(ctx, _NEW_TEXTURE);
156 COPY_4FV(texgen->ObjectPlane, params);
157 }
158 break;
159
160 case GL_EYE_PLANE:
161 {
162 GLfloat tmp[4];
163
164 if (ctx->API != API_OPENGL) {
165 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
166 return;
167 }
168
169 /* Transform plane equation by the inverse modelview matrix */
170 if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
171 _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
172 }
173 _mesa_transform_vector(tmp, params,
174 ctx->ModelviewMatrixStack.Top->inv);
175 if (TEST_EQ_4V(texgen->EyePlane, tmp))
176 return;
177 FLUSH_VERTICES(ctx, _NEW_TEXTURE);
178 COPY_4FV(texgen->EyePlane, tmp);
179 }
180 break;
181
182 default:
183 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
184 return;
185 }
186
187 if (ctx->Driver.TexGen)
188 ctx->Driver.TexGen( ctx, coord, pname, params );
189 }
190
191
192 static void GLAPIENTRY
_mesa_TexGeniv(GLenum coord,GLenum pname,const GLint * params)193 _mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
194 {
195 GLfloat p[4];
196 p[0] = (GLfloat) params[0];
197 if (pname == GL_TEXTURE_GEN_MODE) {
198 p[1] = p[2] = p[3] = 0.0F;
199 }
200 else {
201 p[1] = (GLfloat) params[1];
202 p[2] = (GLfloat) params[2];
203 p[3] = (GLfloat) params[3];
204 }
205 _mesa_TexGenfv(coord, pname, p);
206 }
207
208
209 static void GLAPIENTRY
_mesa_TexGend(GLenum coord,GLenum pname,GLdouble param)210 _mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
211 {
212 GLfloat p[4];
213 p[0] = (GLfloat) param;
214 p[1] = p[2] = p[3] = 0.0F;
215 _mesa_TexGenfv( coord, pname, p );
216 }
217
218 #if FEATURE_ES1
219
220 void GLAPIENTRY
_es_GetTexGenfv(GLenum coord,GLenum pname,GLfloat * params)221 _es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
222 {
223 _mesa_GetTexGenfv(GL_S, pname, params);
224 }
225
226
227 void GLAPIENTRY
_es_TexGenf(GLenum coord,GLenum pname,GLfloat param)228 _es_TexGenf(GLenum coord, GLenum pname, GLfloat param)
229 {
230 if (coord != GL_TEXTURE_GEN_STR_OES) {
231 GET_CURRENT_CONTEXT(ctx);
232 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx](pname)" );
233 return;
234 }
235 /* set S, T, and R at the same time */
236 _mesa_TexGenf(GL_S, pname, param);
237 _mesa_TexGenf(GL_T, pname, param);
238 _mesa_TexGenf(GL_R, pname, param);
239 }
240
241
242 void GLAPIENTRY
_es_TexGenfv(GLenum coord,GLenum pname,const GLfloat * params)243 _es_TexGenfv(GLenum coord, GLenum pname, const GLfloat *params)
244 {
245 if (coord != GL_TEXTURE_GEN_STR_OES) {
246 GET_CURRENT_CONTEXT(ctx);
247 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx]v(pname)" );
248 return;
249 }
250 /* set S, T, and R at the same time */
251 _mesa_TexGenfv(GL_S, pname, params);
252 _mesa_TexGenfv(GL_T, pname, params);
253 _mesa_TexGenfv(GL_R, pname, params);
254 }
255
256 #endif
257
258 static void GLAPIENTRY
_mesa_TexGendv(GLenum coord,GLenum pname,const GLdouble * params)259 _mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
260 {
261 GLfloat p[4];
262 p[0] = (GLfloat) params[0];
263 if (pname == GL_TEXTURE_GEN_MODE) {
264 p[1] = p[2] = p[3] = 0.0F;
265 }
266 else {
267 p[1] = (GLfloat) params[1];
268 p[2] = (GLfloat) params[2];
269 p[3] = (GLfloat) params[3];
270 }
271 _mesa_TexGenfv( coord, pname, p );
272 }
273
274
275 void GLAPIENTRY
_mesa_TexGenf(GLenum coord,GLenum pname,GLfloat param)276 _mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
277 {
278 GLfloat p[4];
279 p[0] = param;
280 p[1] = p[2] = p[3] = 0.0F;
281 _mesa_TexGenfv(coord, pname, p);
282 }
283
284
285 void GLAPIENTRY
_mesa_TexGeni(GLenum coord,GLenum pname,GLint param)286 _mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
287 {
288 GLint p[4];
289 p[0] = param;
290 p[1] = p[2] = p[3] = 0;
291 _mesa_TexGeniv( coord, pname, p );
292 }
293
294
295
296 static void GLAPIENTRY
_mesa_GetTexGendv(GLenum coord,GLenum pname,GLdouble * params)297 _mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
298 {
299 struct gl_texture_unit *texUnit;
300 struct gl_texgen *texgen;
301 GET_CURRENT_CONTEXT(ctx);
302 ASSERT_OUTSIDE_BEGIN_END(ctx);
303
304 if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
305 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGendv(current unit)");
306 return;
307 }
308
309 texUnit = _mesa_get_current_tex_unit(ctx);
310
311 texgen = get_texgen(ctx, texUnit, coord);
312 if (!texgen) {
313 _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)");
314 return;
315 }
316
317 switch (pname) {
318 case GL_TEXTURE_GEN_MODE:
319 params[0] = ENUM_TO_DOUBLE(texgen->Mode);
320 break;
321 case GL_OBJECT_PLANE:
322 COPY_4V(params, texgen->ObjectPlane);
323 break;
324 case GL_EYE_PLANE:
325 COPY_4V(params, texgen->EyePlane);
326 break;
327 default:
328 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
329 }
330 }
331
332
333
334 void GLAPIENTRY
_mesa_GetTexGenfv(GLenum coord,GLenum pname,GLfloat * params)335 _mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
336 {
337 struct gl_texture_unit *texUnit;
338 struct gl_texgen *texgen;
339 GET_CURRENT_CONTEXT(ctx);
340 ASSERT_OUTSIDE_BEGIN_END(ctx);
341
342 if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
343 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGenfv(current unit)");
344 return;
345 }
346
347 texUnit = _mesa_get_current_tex_unit(ctx);
348
349 texgen = get_texgen(ctx, texUnit, coord);
350 if (!texgen) {
351 _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)");
352 return;
353 }
354
355 switch (pname) {
356 case GL_TEXTURE_GEN_MODE:
357 params[0] = ENUM_TO_FLOAT(texgen->Mode);
358 break;
359 case GL_OBJECT_PLANE:
360 if (ctx->API != API_OPENGL) {
361 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
362 return;
363 }
364 COPY_4V(params, texgen->ObjectPlane);
365 break;
366 case GL_EYE_PLANE:
367 if (ctx->API != API_OPENGL) {
368 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
369 return;
370 }
371 COPY_4V(params, texgen->EyePlane);
372 break;
373 default:
374 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
375 }
376 }
377
378
379
380 void GLAPIENTRY
_mesa_GetTexGeniv(GLenum coord,GLenum pname,GLint * params)381 _mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
382 {
383 struct gl_texture_unit *texUnit;
384 struct gl_texgen *texgen;
385 GET_CURRENT_CONTEXT(ctx);
386 ASSERT_OUTSIDE_BEGIN_END(ctx);
387
388 if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
389 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGeniv(current unit)");
390 return;
391 }
392
393 texUnit = _mesa_get_current_tex_unit(ctx);
394
395 texgen = get_texgen(ctx, texUnit, coord);
396 if (!texgen) {
397 _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)");
398 return;
399 }
400
401 switch (pname) {
402 case GL_TEXTURE_GEN_MODE:
403 params[0] = texgen->Mode;
404 break;
405 case GL_OBJECT_PLANE:
406 if (ctx->API != API_OPENGL) {
407 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
408 return;
409 }
410 params[0] = (GLint) texgen->ObjectPlane[0];
411 params[1] = (GLint) texgen->ObjectPlane[1];
412 params[2] = (GLint) texgen->ObjectPlane[2];
413 params[3] = (GLint) texgen->ObjectPlane[3];
414 break;
415 case GL_EYE_PLANE:
416 if (ctx->API != API_OPENGL) {
417 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
418 return;
419 }
420 params[0] = (GLint) texgen->EyePlane[0];
421 params[1] = (GLint) texgen->EyePlane[1];
422 params[2] = (GLint) texgen->EyePlane[2];
423 params[3] = (GLint) texgen->EyePlane[3];
424 break;
425 default:
426 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
427 }
428 }
429
430
431 void
_mesa_init_texgen_dispatch(struct _glapi_table * disp)432 _mesa_init_texgen_dispatch(struct _glapi_table *disp)
433 {
434 SET_GetTexGendv(disp, _mesa_GetTexGendv);
435 SET_GetTexGenfv(disp, _mesa_GetTexGenfv);
436 SET_GetTexGeniv(disp, _mesa_GetTexGeniv);
437 SET_TexGend(disp, _mesa_TexGend);
438 SET_TexGendv(disp, _mesa_TexGendv);
439 SET_TexGenf(disp, _mesa_TexGenf);
440 SET_TexGenfv(disp, _mesa_TexGenfv);
441 SET_TexGeni(disp, _mesa_TexGeni);
442 SET_TexGeniv(disp, _mesa_TexGeniv);
443 }
444
445
446 #endif /* FEATURE_texgen */
447