texgen.c revision b605f4ff11c894500f2d0273c5d4653ff413448d
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/texgen.h" 38#include "main/texstate.h" 39#include "math/m_matrix.h" 40#include "glapi/dispatch.h" 41 42 43#if FEATURE_texgen 44 45 46/** 47 * Return texgen state for given coordinate 48 */ 49static struct gl_texgen * 50get_texgen(struct gl_texture_unit *texUnit, GLenum coord) 51{ 52 switch (coord) { 53 case GL_S: 54 return &texUnit->GenS; 55 case GL_T: 56 return &texUnit->GenT; 57 case GL_R: 58 return &texUnit->GenR; 59 case GL_Q: 60 return &texUnit->GenQ; 61 default: 62 return NULL; 63 } 64} 65 66 67void GLAPIENTRY 68_mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params ) 69{ 70 struct gl_texture_unit *texUnit; 71 struct gl_texgen *texgen; 72 GET_CURRENT_CONTEXT(ctx); 73 ASSERT_OUTSIDE_BEGIN_END(ctx); 74 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), 79 *params, 80 _mesa_lookup_enum_by_nr((GLenum) (GLint) *params)); 81 82 if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) { 83 _mesa_error(ctx, GL_INVALID_OPERATION, "glTexGen(current unit)"); 84 return; 85 } 86 87 texUnit = _mesa_get_current_tex_unit(ctx); 88 89 texgen = get_texgen(texUnit, coord); 90 if (!texgen) { 91 _mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)"); 92 return; 93 } 94 95 switch (pname) { 96 case GL_TEXTURE_GEN_MODE: 97 { 98 GLenum mode = (GLenum) (GLint) params[0]; 99 GLbitfield bit = 0x0; 100 if (texgen->Mode == mode) 101 return; 102 switch (mode) { 103 case GL_OBJECT_LINEAR: 104 bit = TEXGEN_OBJ_LINEAR; 105 break; 106 case GL_EYE_LINEAR: 107 bit = TEXGEN_EYE_LINEAR; 108 break; 109 case GL_SPHERE_MAP: 110 if (coord == GL_S || coord == GL_T) 111 bit = TEXGEN_SPHERE_MAP; 112 break; 113 case GL_REFLECTION_MAP_NV: 114 if (coord != GL_Q) 115 bit = TEXGEN_REFLECTION_MAP_NV; 116 break; 117 case GL_NORMAL_MAP_NV: 118 if (coord != GL_Q) 119 bit = TEXGEN_NORMAL_MAP_NV; 120 break; 121 default: 122 ; /* nop */ 123 } 124 if (!bit) { 125 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" ); 126 return; 127 } 128 FLUSH_VERTICES(ctx, _NEW_TEXTURE); 129 texgen->Mode = mode; 130 texgen->_ModeBit = bit; 131 } 132 break; 133 134 case GL_OBJECT_PLANE: 135 { 136 if (TEST_EQ_4V(texgen->ObjectPlane, params)) 137 return; 138 FLUSH_VERTICES(ctx, _NEW_TEXTURE); 139 COPY_4FV(texgen->ObjectPlane, params); 140 } 141 break; 142 143 case GL_EYE_PLANE: 144 { 145 GLfloat tmp[4]; 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); 149 } 150 _mesa_transform_vector(tmp, params, 151 ctx->ModelviewMatrixStack.Top->inv); 152 if (TEST_EQ_4V(texgen->EyePlane, tmp)) 153 return; 154 FLUSH_VERTICES(ctx, _NEW_TEXTURE); 155 COPY_4FV(texgen->EyePlane, tmp); 156 } 157 break; 158 159 default: 160 _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" ); 161 return; 162 } 163 164 if (ctx->Driver.TexGen) 165 ctx->Driver.TexGen( ctx, coord, pname, params ); 166} 167 168 169static void GLAPIENTRY 170_mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params ) 171{ 172 GLfloat p[4]; 173 p[0] = (GLfloat) params[0]; 174 if (pname == GL_TEXTURE_GEN_MODE) { 175 p[1] = p[2] = p[3] = 0.0F; 176 } 177 else { 178 p[1] = (GLfloat) params[1]; 179 p[2] = (GLfloat) params[2]; 180 p[3] = (GLfloat) params[3]; 181 } 182 _mesa_TexGenfv(coord, pname, p); 183} 184 185 186static void GLAPIENTRY 187_mesa_TexGend(GLenum coord, GLenum pname, GLdouble param ) 188{ 189 GLfloat p[4]; 190 p[0] = (GLfloat) param; 191 p[1] = p[2] = p[3] = 0.0F; 192 _mesa_TexGenfv( coord, pname, p ); 193} 194 195 196static void GLAPIENTRY 197_mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params ) 198{ 199 GLfloat p[4]; 200 p[0] = (GLfloat) params[0]; 201 if (pname == GL_TEXTURE_GEN_MODE) { 202 p[1] = p[2] = p[3] = 0.0F; 203 } 204 else { 205 p[1] = (GLfloat) params[1]; 206 p[2] = (GLfloat) params[2]; 207 p[3] = (GLfloat) params[3]; 208 } 209 _mesa_TexGenfv( coord, pname, p ); 210} 211 212 213static void GLAPIENTRY 214_mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param ) 215{ 216 GLfloat p[4]; 217 p[0] = param; 218 p[1] = p[2] = p[3] = 0.0F; 219 _mesa_TexGenfv(coord, pname, p); 220} 221 222 223void GLAPIENTRY 224_mesa_TexGeni( GLenum coord, GLenum pname, GLint param ) 225{ 226 GLint p[4]; 227 p[0] = param; 228 p[1] = p[2] = p[3] = 0; 229 _mesa_TexGeniv( coord, pname, p ); 230} 231 232 233 234static void GLAPIENTRY 235_mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params ) 236{ 237 struct gl_texture_unit *texUnit; 238 struct gl_texgen *texgen; 239 GET_CURRENT_CONTEXT(ctx); 240 ASSERT_OUTSIDE_BEGIN_END(ctx); 241 242 if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) { 243 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGendv(current unit)"); 244 return; 245 } 246 247 texUnit = _mesa_get_current_tex_unit(ctx); 248 249 texgen = get_texgen(texUnit, coord); 250 if (!texgen) { 251 _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)"); 252 return; 253 } 254 255 switch (pname) { 256 case GL_TEXTURE_GEN_MODE: 257 params[0] = ENUM_TO_DOUBLE(texgen->Mode); 258 break; 259 case GL_OBJECT_PLANE: 260 COPY_4V(params, texgen->ObjectPlane); 261 break; 262 case GL_EYE_PLANE: 263 COPY_4V(params, texgen->EyePlane); 264 break; 265 default: 266 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" ); 267 } 268} 269 270 271 272static void GLAPIENTRY 273_mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params ) 274{ 275 struct gl_texture_unit *texUnit; 276 struct gl_texgen *texgen; 277 GET_CURRENT_CONTEXT(ctx); 278 ASSERT_OUTSIDE_BEGIN_END(ctx); 279 280 if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) { 281 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGenfv(current unit)"); 282 return; 283 } 284 285 texUnit = _mesa_get_current_tex_unit(ctx); 286 287 texgen = get_texgen(texUnit, coord); 288 if (!texgen) { 289 _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)"); 290 return; 291 } 292 293 switch (pname) { 294 case GL_TEXTURE_GEN_MODE: 295 params[0] = ENUM_TO_FLOAT(texgen->Mode); 296 break; 297 case GL_OBJECT_PLANE: 298 COPY_4V(params, texgen->ObjectPlane); 299 break; 300 case GL_EYE_PLANE: 301 COPY_4V(params, texgen->EyePlane); 302 break; 303 default: 304 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" ); 305 } 306} 307 308 309 310static void GLAPIENTRY 311_mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params ) 312{ 313 struct gl_texture_unit *texUnit; 314 struct gl_texgen *texgen; 315 GET_CURRENT_CONTEXT(ctx); 316 ASSERT_OUTSIDE_BEGIN_END(ctx); 317 318 if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) { 319 _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGeniv(current unit)"); 320 return; 321 } 322 323 texUnit = _mesa_get_current_tex_unit(ctx); 324 325 texgen = get_texgen(texUnit, coord); 326 if (!texgen) { 327 _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)"); 328 return; 329 } 330 331 switch (pname) { 332 case GL_TEXTURE_GEN_MODE: 333 params[0] = texgen->Mode; 334 break; 335 case GL_OBJECT_PLANE: 336 params[0] = (GLint) texgen->ObjectPlane[0]; 337 params[1] = (GLint) texgen->ObjectPlane[1]; 338 params[2] = (GLint) texgen->ObjectPlane[2]; 339 params[3] = (GLint) texgen->ObjectPlane[3]; 340 break; 341 case GL_EYE_PLANE: 342 params[0] = (GLint) texgen->EyePlane[0]; 343 params[1] = (GLint) texgen->EyePlane[1]; 344 params[2] = (GLint) texgen->EyePlane[2]; 345 params[3] = (GLint) texgen->EyePlane[3]; 346 break; 347 default: 348 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" ); 349 } 350} 351 352 353void 354_mesa_init_texgen_dispatch(struct _glapi_table *disp) 355{ 356 SET_GetTexGendv(disp, _mesa_GetTexGendv); 357 SET_GetTexGenfv(disp, _mesa_GetTexGenfv); 358 SET_GetTexGeniv(disp, _mesa_GetTexGeniv); 359 SET_TexGend(disp, _mesa_TexGend); 360 SET_TexGendv(disp, _mesa_TexGendv); 361 SET_TexGenf(disp, _mesa_TexGenf); 362 SET_TexGenfv(disp, _mesa_TexGenfv); 363 SET_TexGeni(disp, _mesa_TexGeni); 364 SET_TexGeniv(disp, _mesa_TexGeniv); 365} 366 367 368#endif /* FEATURE_texgen */ 369