src/mesa/main/texgen.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * 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 "main/dispatch.h"
  41
  42
  43 /**
  44  * Return texgen state for given coordinate
  45  */
  46 static struct gl_texgen *
  47 get_texgen(struct gl_context *ctx, struct gl_texture_unit *texUnit,
  48            GLenum coord)
  49 {
  50    if (ctx->API == API_OPENGLES) {
  51       return (coord == GL_TEXTURE_GEN_STR_OES)
  52          ? &texUnit->GenS : NULL;
  53    }
  54
  55    switch (coord) {
  56    case GL_S:
  57       return &texUnit->GenS;
  58    case GL_T:
  59       return &texUnit->GenT;
  60    case GL_R:
  61       return &texUnit->GenR;
  62    case GL_Q:
  63       return &texUnit->GenQ;
  64    default:
  65       return NULL;
  66    }
  67 }
  68
  69
  70 void GLAPIENTRY
  71 _mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params )
  72 {
  73    struct gl_texture_unit *texUnit;
  74    struct gl_texgen *texgen;
  75    GET_CURRENT_CONTEXT(ctx);
  76
  77    if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
  78       _mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
  79                   _mesa_enum_to_string(coord),
  80                   _mesa_enum_to_string(pname),
  81                   *params,
  82                   _mesa_enum_to_string((GLenum) (GLint) *params));
  83
  84    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
  85       _mesa_error(ctx, GL_INVALID_OPERATION, "glTexGen(current unit)");
  86       return;
  87    }
  88
  89    texUnit = _mesa_get_current_tex_unit(ctx);
  90
  91    texgen = get_texgen(ctx, texUnit, coord);
  92    if (!texgen) {
  93       _mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)");
  94       return;
  95    }
  96
  97    switch (pname) {
  98    case GL_TEXTURE_GEN_MODE:
  99       {
 100          GLenum mode = (GLenum) (GLint) params[0];
 101          GLbitfield bit = 0x0;
 102          if (texgen->Mode == mode)
 103             return;
 104          switch (mode) {
 105          case GL_OBJECT_LINEAR:
 106             bit = TEXGEN_OBJ_LINEAR;
 107             break;
 108          case GL_EYE_LINEAR:
 109             bit = TEXGEN_EYE_LINEAR;
 110             break;
 111          case GL_SPHERE_MAP:
 112             if (coord == GL_S || coord == GL_T)
 113                bit = TEXGEN_SPHERE_MAP;
 114             break;
 115          case GL_REFLECTION_MAP_NV:
 116             if (coord != GL_Q)
 117                bit = TEXGEN_REFLECTION_MAP_NV;
 118             break;
 119          case GL_NORMAL_MAP_NV:
 120             if (coord != GL_Q)
 121                bit = TEXGEN_NORMAL_MAP_NV;
 122             break;
 123          default:
 124             ; /* nop */
 125          }
 126          if (!bit) {
 127             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 128             return;
 129          }
 130          if (ctx->API != API_OPENGL_COMPAT
 131              && (bit & (TEXGEN_REFLECTION_MAP_NV | TEXGEN_NORMAL_MAP_NV)) == 0) {
 132             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 133             return;
 134          }
 135
 136          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 137          texgen->Mode = mode;
 138          texgen->_ModeBit = bit;
 139       }
 140       break;
 141
 142    case GL_OBJECT_PLANE:
 143       {
 144          if (ctx->API != API_OPENGL_COMPAT) {
 145             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 146             return;
 147          }
 148          if (TEST_EQ_4V(texgen->ObjectPlane, params))
 149             return;
 150          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 151          COPY_4FV(texgen->ObjectPlane, params);
 152       }
 153       break;
 154
 155    case GL_EYE_PLANE:
 156       {
 157          GLfloat tmp[4];
 158
 159          if (ctx->API != API_OPENGL_COMPAT) {
 160             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 161             return;
 162          }
 163
 164          /* Transform plane equation by the inverse modelview matrix */
 165          if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
 166             _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
 167          }
 168          _mesa_transform_vector(tmp, params,
 169                                 ctx->ModelviewMatrixStack.Top->inv);
 170          if (TEST_EQ_4V(texgen->EyePlane, tmp))
 171             return;
 172          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 173          COPY_4FV(texgen->EyePlane, tmp);
 174       }
 175       break;
 176
 177    default:
 178       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
 179       return;
 180    }
 181
 182    if (ctx->Driver.TexGen)
 183       ctx->Driver.TexGen( ctx, coord, pname, params );
 184 }
 185
 186
 187 void GLAPIENTRY
 188 _mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
 189 {
 190    GLfloat p[4];
 191    p[0] = (GLfloat) params[0];
 192    if (pname == GL_TEXTURE_GEN_MODE) {
 193       p[1] = p[2] = p[3] = 0.0F;
 194    }
 195    else {
 196       p[1] = (GLfloat) params[1];
 197       p[2] = (GLfloat) params[2];
 198       p[3] = (GLfloat) params[3];
 199    }
 200    _mesa_TexGenfv(coord, pname, p);
 201 }
 202
 203
 204 void GLAPIENTRY
 205 _mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
 206 {
 207    GLfloat p[4];
 208    p[0] = (GLfloat) param;
 209    p[1] = p[2] = p[3] = 0.0F;
 210    _mesa_TexGenfv( coord, pname, p );
 211 }
 212
 213
 214 void GLAPIENTRY
 215 _es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
 216 {
 217    _mesa_GetTexGenfv(GL_S, pname, params);
 218 }
 219
 220
 221 void GLAPIENTRY
 222 _es_TexGenf(GLenum coord, GLenum pname, GLfloat param)
 223 {
 224    if (coord != GL_TEXTURE_GEN_STR_OES) {
 225       GET_CURRENT_CONTEXT(ctx);
 226       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx](pname)" );
 227       return;
 228    }
 229    /* set S, T, and R at the same time */
 230    _mesa_TexGenf(GL_S, pname, param);
 231    _mesa_TexGenf(GL_T, pname, param);
 232    _mesa_TexGenf(GL_R, pname, param);
 233 }
 234
 235
 236 void GLAPIENTRY
 237 _es_TexGenfv(GLenum coord, GLenum pname, const GLfloat *params)
 238 {
 239    if (coord != GL_TEXTURE_GEN_STR_OES) {
 240       GET_CURRENT_CONTEXT(ctx);
 241       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGen[fx]v(pname)" );
 242       return;
 243    }
 244    /* set S, T, and R at the same time */
 245    _mesa_TexGenfv(GL_S, pname, params);
 246    _mesa_TexGenfv(GL_T, pname, params);
 247    _mesa_TexGenfv(GL_R, pname, params);
 248 }
 249
 250
 251 void GLAPIENTRY
 252 _mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
 253 {
 254    GLfloat p[4];
 255    p[0] = (GLfloat) params[0];
 256    if (pname == GL_TEXTURE_GEN_MODE) {
 257       p[1] = p[2] = p[3] = 0.0F;
 258    }
 259    else {
 260       p[1] = (GLfloat) params[1];
 261       p[2] = (GLfloat) params[2];
 262       p[3] = (GLfloat) params[3];
 263    }
 264    _mesa_TexGenfv( coord, pname, p );
 265 }
 266
 267
 268 void GLAPIENTRY
 269 _mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
 270 {
 271    GLfloat p[4];
 272    p[0] = param;
 273    p[1] = p[2] = p[3] = 0.0F;
 274    _mesa_TexGenfv(coord, pname, p);
 275 }
 276
 277
 278 void GLAPIENTRY
 279 _mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
 280 {
 281    GLint p[4];
 282    p[0] = param;
 283    p[1] = p[2] = p[3] = 0;
 284    _mesa_TexGeniv( coord, pname, p );
 285 }
 286
 287
 288
 289 void GLAPIENTRY
 290 _mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
 291 {
 292    struct gl_texture_unit *texUnit;
 293    struct gl_texgen *texgen;
 294    GET_CURRENT_CONTEXT(ctx);
 295
 296    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 297       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGendv(current unit)");
 298       return;
 299    }
 300
 301    texUnit = _mesa_get_current_tex_unit(ctx);
 302
 303    texgen = get_texgen(ctx, texUnit, coord);
 304    if (!texgen) {
 305       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)");
 306       return;
 307    }
 308
 309    switch (pname) {
 310    case GL_TEXTURE_GEN_MODE:
 311       params[0] = ENUM_TO_DOUBLE(texgen->Mode);
 312       break;
 313    case GL_OBJECT_PLANE:
 314       COPY_4V(params, texgen->ObjectPlane);
 315       break;
 316    case GL_EYE_PLANE:
 317       COPY_4V(params, texgen->EyePlane);
 318       break;
 319    default:
 320       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
 321    }
 322 }
 323
 324
 325
 326 void GLAPIENTRY
 327 _mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
 328 {
 329    struct gl_texture_unit *texUnit;
 330    struct gl_texgen *texgen;
 331    GET_CURRENT_CONTEXT(ctx);
 332
 333    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 334       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGenfv(current unit)");
 335       return;
 336    }
 337
 338    texUnit = _mesa_get_current_tex_unit(ctx);
 339
 340    texgen = get_texgen(ctx, texUnit, coord);
 341    if (!texgen) {
 342       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)");
 343       return;
 344    }
 345
 346    switch (pname) {
 347    case GL_TEXTURE_GEN_MODE:
 348       params[0] = ENUM_TO_FLOAT(texgen->Mode);
 349       break;
 350    case GL_OBJECT_PLANE:
 351       if (ctx->API != API_OPENGL_COMPAT) {
 352          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
 353          return;
 354       }
 355       COPY_4V(params, texgen->ObjectPlane);
 356       break;
 357    case GL_EYE_PLANE:
 358       if (ctx->API != API_OPENGL_COMPAT) {
 359          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(param)" );
 360          return;
 361       }
 362       COPY_4V(params, texgen->EyePlane);
 363       break;
 364    default:
 365       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
 366    }
 367 }
 368
 369
 370
 371 void GLAPIENTRY
 372 _mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
 373 {
 374    struct gl_texture_unit *texUnit;
 375    struct gl_texgen *texgen;
 376    GET_CURRENT_CONTEXT(ctx);
 377
 378    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 379       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGeniv(current unit)");
 380       return;
 381    }
 382
 383    texUnit = _mesa_get_current_tex_unit(ctx);
 384
 385    texgen = get_texgen(ctx, texUnit, coord);
 386    if (!texgen) {
 387       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)");
 388       return;
 389    }
 390
 391    switch (pname) {
 392    case GL_TEXTURE_GEN_MODE:
 393       params[0] = texgen->Mode;
 394       break;
 395    case GL_OBJECT_PLANE:
 396       if (ctx->API != API_OPENGL_COMPAT) {
 397          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
 398          return;
 399       }
 400       params[0] = (GLint) texgen->ObjectPlane[0];
 401       params[1] = (GLint) texgen->ObjectPlane[1];
 402       params[2] = (GLint) texgen->ObjectPlane[2];
 403       params[3] = (GLint) texgen->ObjectPlane[3];
 404       break;
 405    case GL_EYE_PLANE:
 406       if (ctx->API != API_OPENGL_COMPAT) {
 407          _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(param)" );
 408          return;
 409       }
 410       params[0] = (GLint) texgen->EyePlane[0];
 411       params[1] = (GLint) texgen->EyePlane[1];
 412       params[2] = (GLint) texgen->EyePlane[2];
 413       params[3] = (GLint) texgen->EyePlane[3];
 414       break;
 415    default:
 416       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
 417    }
 418 }