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