src/mesa/main/texgen.c

   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 *
  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
  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
 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
 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
 221 _es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
 222 {
 223    _mesa_GetTexGenfv(GL_S, pname, params);
 224 }
 225
 226
 227 void GLAPIENTRY
 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
 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
 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
 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
 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
 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
 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
 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
 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 */