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    ASSERT_OUTSIDE_BEGIN_END(ctx);
  78
  79    if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
  80       _mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
  81                   _mesa_lookup_enum_by_nr(coord),
  82                   _mesa_lookup_enum_by_nr(pname),
  83                   *params,
  84                   _mesa_lookup_enum_by_nr((GLenum) (GLint) *params));
  85
  86    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
  87       _mesa_error(ctx, GL_INVALID_OPERATION, "glTexGen(current unit)");
  88       return;
  89    }
  90
  91    texUnit = _mesa_get_current_tex_unit(ctx);
  92
  93    texgen = get_texgen(ctx, texUnit, coord);
  94    if (!texgen) {
  95       _mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)");
  96       return;
  97    }
  98
  99    switch (pname) {
 100    case GL_TEXTURE_GEN_MODE:
 101       {
 102          GLenum mode = (GLenum) (GLint) params[0];
 103          GLbitfield bit = 0x0;
 104          if (texgen->Mode == mode)
 105             return;
 106          switch (mode) {
 107          case GL_OBJECT_LINEAR:
 108             bit = TEXGEN_OBJ_LINEAR;
 109             break;
 110          case GL_EYE_LINEAR:
 111             bit = TEXGEN_EYE_LINEAR;
 112             break;
 113          case GL_SPHERE_MAP:
 114             if (coord == GL_S || coord == GL_T)
 115                bit = TEXGEN_SPHERE_MAP;
 116             break;
 117          case GL_REFLECTION_MAP_NV:
 118             if (coord != GL_Q)
 119                bit = TEXGEN_REFLECTION_MAP_NV;
 120             break;
 121          case GL_NORMAL_MAP_NV:
 122             if (coord != GL_Q)
 123                bit = TEXGEN_NORMAL_MAP_NV;
 124             break;
 125          default:
 126             ; /* nop */
 127          }
 128          if (!bit) {
 129             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 130             return;
 131          }
 132          if (ctx->API != API_OPENGL
 133              && (bit & (TEXGEN_REFLECTION_MAP_NV | TEXGEN_NORMAL_MAP_NV)) == 0) {
 134             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 135             return;
 136          }
 137
 138          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 139          texgen->Mode = mode;
 140          texgen->_ModeBit = bit;
 141       }
 142       break;
 143
 144    case GL_OBJECT_PLANE:
 145       {
 146          if (ctx->API != API_OPENGL) {
 147             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 148             return;
 149          }
 150          if (TEST_EQ_4V(texgen->ObjectPlane, params))
 151             return;
 152          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 153          COPY_4FV(texgen->ObjectPlane, params);
 154       }
 155       break;
 156
 157    case GL_EYE_PLANE:
 158       {
 159          GLfloat tmp[4];
 160
 161          if (ctx->API != API_OPENGL) {
 162             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 163             return;
 164          }
 165
 166          /* Transform plane equation by the inverse modelview matrix */
 167          if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
 168             _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
 169          }
 170          _mesa_transform_vector(tmp, params,
 171                                 ctx->ModelviewMatrixStack.Top->inv);
 172          if (TEST_EQ_4V(texgen->EyePlane, tmp))
 173             return;
 174          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 175          COPY_4FV(texgen->EyePlane, tmp);
 176       }
 177       break;
 178
 179    default:
 180       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
 181       return;
 182    }
 183
 184    if (ctx->Driver.TexGen)
 185       ctx->Driver.TexGen( ctx, coord, pname, params );
 186 }
 187
 188
 189 static void GLAPIENTRY
 190 _mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
 191 {
 192    GLfloat p[4];
 193    p[0] = (GLfloat) params[0];
 194    if (pname == GL_TEXTURE_GEN_MODE) {
 195       p[1] = p[2] = p[3] = 0.0F;
 196    }
 197    else {
 198       p[1] = (GLfloat) params[1];
 199       p[2] = (GLfloat) params[2];
 200       p[3] = (GLfloat) params[3];
 201    }
 202    _mesa_TexGenfv(coord, pname, p);
 203 }
 204
 205
 206 static void GLAPIENTRY
 207 _mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
 208 {
 209    GLfloat p[4];
 210    p[0] = (GLfloat) param;
 211    p[1] = p[2] = p[3] = 0.0F;
 212    _mesa_TexGenfv( coord, pname, p );
 213 }
 214
 215
 216 void GLAPIENTRY
 217 _es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
 218 {
 219    _mesa_GetTexGenfv(GL_S, pname, params);
 220 }
 221
 222
 223 void GLAPIENTRY
 224 _es_TexGenf(GLenum coord, GLenum pname, GLfloat param)
 225 {
 226    if (coord != GL_TEXTURE_GEN_STR_OES) {
 227       GET_CURRENT_CONTEXT(ctx);
 228       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx](pname)" );
 229       return;
 230    }
 231    /* set S, T, and R at the same time */
 232    _mesa_TexGenf(GL_S, pname, param);
 233    _mesa_TexGenf(GL_T, pname, param);
 234    _mesa_TexGenf(GL_R, pname, param);
 235 }
 236
 237
 238 void GLAPIENTRY
 239 _es_TexGenfv(GLenum coord, GLenum pname, const GLfloat *params)
 240 {
 241    if (coord != GL_TEXTURE_GEN_STR_OES) {
 242       GET_CURRENT_CONTEXT(ctx);
 243       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx]v(pname)" );
 244       return;
 245    }
 246    /* set S, T, and R at the same time */
 247    _mesa_TexGenfv(GL_S, pname, params);
 248    _mesa_TexGenfv(GL_T, pname, params);
 249    _mesa_TexGenfv(GL_R, pname, params);
 250 }
 251
 252
 253 static void GLAPIENTRY
 254 _mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
 255 {
 256    GLfloat p[4];
 257    p[0] = (GLfloat) params[0];
 258    if (pname == GL_TEXTURE_GEN_MODE) {
 259       p[1] = p[2] = p[3] = 0.0F;
 260    }
 261    else {
 262       p[1] = (GLfloat) params[1];
 263       p[2] = (GLfloat) params[2];
 264       p[3] = (GLfloat) params[3];
 265    }
 266    _mesa_TexGenfv( coord, pname, p );
 267 }
 268
 269
 270 void GLAPIENTRY
 271 _mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
 272 {
 273    GLfloat p[4];
 274    p[0] = param;
 275    p[1] = p[2] = p[3] = 0.0F;
 276    _mesa_TexGenfv(coord, pname, p);
 277 }
 278
 279
 280 void GLAPIENTRY
 281 _mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
 282 {
 283    GLint p[4];
 284    p[0] = param;
 285    p[1] = p[2] = p[3] = 0;
 286    _mesa_TexGeniv( coord, pname, p );
 287 }
 288
 289
 290
 291 static void GLAPIENTRY
 292 _mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
 293 {
 294    struct gl_texture_unit *texUnit;
 295    struct gl_texgen *texgen;
 296    GET_CURRENT_CONTEXT(ctx);
 297    ASSERT_OUTSIDE_BEGIN_END(ctx);
 298
 299    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 300       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGendv(current unit)");
 301       return;
 302    }
 303
 304    texUnit = _mesa_get_current_tex_unit(ctx);
 305
 306    texgen = get_texgen(ctx, texUnit, coord);
 307    if (!texgen) {
 308       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)");
 309       return;
 310    }
 311
 312    switch (pname) {
 313    case GL_TEXTURE_GEN_MODE:
 314       params[0] = ENUM_TO_DOUBLE(texgen->Mode);
 315       break;
 316    case GL_OBJECT_PLANE:
 317       COPY_4V(params, texgen->ObjectPlane);
 318       break;
 319    case GL_EYE_PLANE:
 320       COPY_4V(params, texgen->EyePlane);
 321       break;
 322    default:
 323       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
 324    }
 325 }
 326
 327
 328
 329 void GLAPIENTRY
 330 _mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
 331 {
 332    struct gl_texture_unit *texUnit;
 333    struct gl_texgen *texgen;
 334    GET_CURRENT_CONTEXT(ctx);
 335    ASSERT_OUTSIDE_BEGIN_END(ctx);
 336
 337    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 338       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGenfv(current unit)");
 339       return;
 340    }
 341
 342    texUnit = _mesa_get_current_tex_unit(ctx);
 343
 344    texgen = get_texgen(ctx, texUnit, coord);
 345    if (!texgen) {
 346       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)");
 347       return;
 348    }
 349
 350    switch (pname) {
 351    case GL_TEXTURE_GEN_MODE:
 352       params[0] = ENUM_TO_FLOAT(texgen->Mode);
 353       break;
 354    case GL_OBJECT_PLANE:
 355       if (ctx->API != API_OPENGL) {
 356          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
 357          return;
 358       }
 359       COPY_4V(params, texgen->ObjectPlane);
 360       break;
 361    case GL_EYE_PLANE:
 362       if (ctx->API != API_OPENGL) {
 363          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
 364          return;
 365       }
 366       COPY_4V(params, texgen->EyePlane);
 367       break;
 368    default:
 369       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
 370    }
 371 }
 372
 373
 374
 375 void GLAPIENTRY
 376 _mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
 377 {
 378    struct gl_texture_unit *texUnit;
 379    struct gl_texgen *texgen;
 380    GET_CURRENT_CONTEXT(ctx);
 381    ASSERT_OUTSIDE_BEGIN_END(ctx);
 382
 383    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 384       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGeniv(current unit)");
 385       return;
 386    }
 387
 388    texUnit = _mesa_get_current_tex_unit(ctx);
 389
 390    texgen = get_texgen(ctx, texUnit, coord);
 391    if (!texgen) {
 392       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)");
 393       return;
 394    }
 395
 396    switch (pname) {
 397    case GL_TEXTURE_GEN_MODE:
 398       params[0] = texgen->Mode;
 399       break;
 400    case GL_OBJECT_PLANE:
 401       if (ctx->API != API_OPENGL) {
 402          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
 403          return;
 404       }
 405       params[0] = (GLint) texgen->ObjectPlane[0];
 406       params[1] = (GLint) texgen->ObjectPlane[1];
 407       params[2] = (GLint) texgen->ObjectPlane[2];
 408       params[3] = (GLint) texgen->ObjectPlane[3];
 409       break;
 410    case GL_EYE_PLANE:
 411       if (ctx->API != API_OPENGL) {
 412          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
 413          return;
 414       }
 415       params[0] = (GLint) texgen->EyePlane[0];
 416       params[1] = (GLint) texgen->EyePlane[1];
 417       params[2] = (GLint) texgen->EyePlane[2];
 418       params[3] = (GLint) texgen->EyePlane[3];
 419       break;
 420    default:
 421       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
 422    }
 423 }
 424
 425
 426 void
 427 _mesa_init_texgen_dispatch(struct gl_context *ctx, struct _glapi_table *disp)
 428 {
 429    SET_GetTexGenfv(disp, _mesa_GetTexGenfv);
 430    SET_GetTexGeniv(disp, _mesa_GetTexGeniv);
 431    SET_TexGenf(disp, _mesa_TexGenf);
 432    SET_TexGenfv(disp, _mesa_TexGenfv);
 433    SET_TexGeni(disp, _mesa_TexGeni);
 434    SET_TexGeniv(disp, _mesa_TexGeniv);
 435    if (ctx->API == API_OPENGL) {
 436       SET_GetTexGendv(disp, _mesa_GetTexGendv);
 437       SET_TexGend(disp, _mesa_TexGend);
 438       SET_TexGendv(disp, _mesa_TexGendv);
 439    }
 440 }