reactos/dll/opengl/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 #include <precomp.h>
  33
  34 #if FEATURE_texgen
  35
  36
  37 /**
  38  * Return texgen state for given coordinate
  39  */
  40 static struct gl_texgen *
  41 get_texgen(struct gl_texture_unit *texUnit, GLenum coord)
  42 {
  43    switch (coord) {
  44    case GL_S:
  45       return &texUnit->GenS;
  46    case GL_T:
  47       return &texUnit->GenT;
  48    case GL_R:
  49       return &texUnit->GenR;
  50    case GL_Q:
  51       return &texUnit->GenQ;
  52    default:
  53       return NULL;
  54    }
  55 }
  56
  57
  58 void GLAPIENTRY
  59 _mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params )
  60 {
  61    struct gl_texture_unit *texUnit;
  62    struct gl_texgen *texgen;
  63    GET_CURRENT_CONTEXT(ctx);
  64    ASSERT_OUTSIDE_BEGIN_END(ctx);
  65
  66    if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
  67       _mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
  68                   _mesa_lookup_enum_by_nr(coord),
  69                   _mesa_lookup_enum_by_nr(pname),
  70                   *params,
  71                   _mesa_lookup_enum_by_nr((GLenum) (GLint) *params));
  72
  73    texUnit = &ctx->Texture.Unit;
  74
  75    texgen = get_texgen(texUnit, coord);
  76    if (!texgen) {
  77       _mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)");
  78       return;
  79    }
  80
  81    switch (pname) {
  82    case GL_TEXTURE_GEN_MODE:
  83       {
  84          GLenum mode = (GLenum) (GLint) params[0];
  85          GLbitfield bit = 0x0;
  86          if (texgen->Mode == mode)
  87             return;
  88          switch (mode) {
  89          case GL_OBJECT_LINEAR:
  90             bit = TEXGEN_OBJ_LINEAR;
  91             break;
  92          case GL_EYE_LINEAR:
  93             bit = TEXGEN_EYE_LINEAR;
  94             break;
  95          case GL_SPHERE_MAP:
  96             if (coord == GL_S || coord == GL_T)
  97                bit = TEXGEN_SPHERE_MAP;
  98             break;
  99          case GL_REFLECTION_MAP_NV:
 100             if (coord != GL_Q)
 101                bit = TEXGEN_REFLECTION_MAP_NV;
 102             break;
 103          case GL_NORMAL_MAP_NV:
 104             if (coord != GL_Q)
 105                bit = TEXGEN_NORMAL_MAP_NV;
 106             break;
 107          default:
 108             ; /* nop */
 109          }
 110          if (!bit) {
 111             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 112             return;
 113          }
 114          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 115          texgen->Mode = mode;
 116          texgen->_ModeBit = bit;
 117       }
 118       break;
 119
 120    case GL_OBJECT_PLANE:
 121       {
 122          if (TEST_EQ_4V(texgen->ObjectPlane, params))
 123             return;
 124          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 125          COPY_4FV(texgen->ObjectPlane, params);
 126       }
 127       break;
 128
 129    case GL_EYE_PLANE:
 130       {
 131          GLfloat tmp[4];
 132          /* Transform plane equation by the inverse modelview matrix */
 133          if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
 134             _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
 135          }
 136          _mesa_transform_vector(tmp, params,
 137                                 ctx->ModelviewMatrixStack.Top->inv);
 138          if (TEST_EQ_4V(texgen->EyePlane, tmp))
 139             return;
 140          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 141          COPY_4FV(texgen->EyePlane, tmp);
 142       }
 143       break;
 144
 145    default:
 146       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
 147       return;
 148    }
 149
 150    if (ctx->Driver.TexGen)
 151       ctx->Driver.TexGen( ctx, coord, pname, params );
 152 }
 153
 154
 155 static void GLAPIENTRY
 156 _mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
 157 {
 158    GLfloat p[4];
 159    p[0] = (GLfloat) params[0];
 160    if (pname == GL_TEXTURE_GEN_MODE) {
 161       p[1] = p[2] = p[3] = 0.0F;
 162    }
 163    else {
 164       p[1] = (GLfloat) params[1];
 165       p[2] = (GLfloat) params[2];
 166       p[3] = (GLfloat) params[3];
 167    }
 168    _mesa_TexGenfv(coord, pname, p);
 169 }
 170
 171
 172 static void GLAPIENTRY
 173 _mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
 174 {
 175    GLfloat p[4];
 176    p[0] = (GLfloat) param;
 177    p[1] = p[2] = p[3] = 0.0F;
 178    _mesa_TexGenfv( coord, pname, p );
 179 }
 180
 181 #if FEATURE_ES1
 182
 183 void GLAPIENTRY
 184 _es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
 185 {
 186    ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
 187    _mesa_GetTexGenfv(GL_S, pname, params);
 188 }
 189
 190
 191 void GLAPIENTRY
 192 _es_TexGenf(GLenum coord, GLenum pname, GLfloat param)
 193 {
 194    ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
 195    /* set S, T, and R at the same time */
 196    _mesa_TexGenf(GL_S, pname, param);
 197    _mesa_TexGenf(GL_T, pname, param);
 198    _mesa_TexGenf(GL_R, pname, param);
 199 }
 200
 201
 202 void GLAPIENTRY
 203 _es_TexGenfv(GLenum coord, GLenum pname, const GLfloat *params)
 204 {
 205    ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
 206    /* set S, T, and R at the same time */
 207    _mesa_TexGenfv(GL_S, pname, params);
 208    _mesa_TexGenfv(GL_T, pname, params);
 209    _mesa_TexGenfv(GL_R, pname, params);
 210 }
 211
 212 #endif
 213
 214 static void GLAPIENTRY
 215 _mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
 216 {
 217    GLfloat p[4];
 218    p[0] = (GLfloat) params[0];
 219    if (pname == GL_TEXTURE_GEN_MODE) {
 220       p[1] = p[2] = p[3] = 0.0F;
 221    }
 222    else {
 223       p[1] = (GLfloat) params[1];
 224       p[2] = (GLfloat) params[2];
 225       p[3] = (GLfloat) params[3];
 226    }
 227    _mesa_TexGenfv( coord, pname, p );
 228 }
 229
 230
 231 void GLAPIENTRY
 232 _mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
 233 {
 234    GLfloat p[4];
 235    p[0] = param;
 236    p[1] = p[2] = p[3] = 0.0F;
 237    _mesa_TexGenfv(coord, pname, p);
 238 }
 239
 240
 241 void GLAPIENTRY
 242 _mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
 243 {
 244    GLint p[4];
 245    p[0] = param;
 246    p[1] = p[2] = p[3] = 0;
 247    _mesa_TexGeniv( coord, pname, p );
 248 }
 249
 250
 251
 252 static void GLAPIENTRY
 253 _mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
 254 {
 255    struct gl_texture_unit *texUnit;
 256    struct gl_texgen *texgen;
 257    GET_CURRENT_CONTEXT(ctx);
 258    ASSERT_OUTSIDE_BEGIN_END(ctx);
 259
 260    texUnit = &ctx->Texture.Unit;
 261
 262    texgen = get_texgen(texUnit, coord);
 263    if (!texgen) {
 264       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)");
 265       return;
 266    }
 267
 268    switch (pname) {
 269    case GL_TEXTURE_GEN_MODE:
 270       params[0] = ENUM_TO_DOUBLE(texgen->Mode);
 271       break;
 272    case GL_OBJECT_PLANE:
 273       COPY_4V(params, texgen->ObjectPlane);
 274       break;
 275    case GL_EYE_PLANE:
 276       COPY_4V(params, texgen->EyePlane);
 277       break;
 278    default:
 279       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
 280    }
 281 }
 282
 283
 284
 285 void GLAPIENTRY
 286 _mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
 287 {
 288    struct gl_texture_unit *texUnit;
 289    struct gl_texgen *texgen;
 290    GET_CURRENT_CONTEXT(ctx);
 291    ASSERT_OUTSIDE_BEGIN_END(ctx);
 292
 293    texUnit = &ctx->Texture.Unit;
 294
 295    texgen = get_texgen(texUnit, coord);
 296    if (!texgen) {
 297       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)");
 298       return;
 299    }
 300
 301    switch (pname) {
 302    case GL_TEXTURE_GEN_MODE:
 303       params[0] = ENUM_TO_FLOAT(texgen->Mode);
 304       break;
 305    case GL_OBJECT_PLANE:
 306       COPY_4V(params, texgen->ObjectPlane);
 307       break;
 308    case GL_EYE_PLANE:
 309       COPY_4V(params, texgen->EyePlane);
 310       break;
 311    default:
 312       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
 313    }
 314 }
 315
 316
 317
 318 static void GLAPIENTRY
 319 _mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
 320 {
 321    struct gl_texture_unit *texUnit;
 322    struct gl_texgen *texgen;
 323    GET_CURRENT_CONTEXT(ctx);
 324    ASSERT_OUTSIDE_BEGIN_END(ctx);
 325
 326    texUnit = &ctx->Texture.Unit;
 327
 328    texgen = get_texgen(texUnit, coord);
 329    if (!texgen) {
 330       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)");
 331       return;
 332    }
 333
 334    switch (pname) {
 335    case GL_TEXTURE_GEN_MODE:
 336       params[0] = texgen->Mode;
 337       break;
 338    case GL_OBJECT_PLANE:
 339       params[0] = (GLint) texgen->ObjectPlane[0];
 340       params[1] = (GLint) texgen->ObjectPlane[1];
 341       params[2] = (GLint) texgen->ObjectPlane[2];
 342       params[3] = (GLint) texgen->ObjectPlane[3];
 343       break;
 344    case GL_EYE_PLANE:
 345       params[0] = (GLint) texgen->EyePlane[0];
 346       params[1] = (GLint) texgen->EyePlane[1];
 347       params[2] = (GLint) texgen->EyePlane[2];
 348       params[3] = (GLint) texgen->EyePlane[3];
 349       break;
 350    default:
 351       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
 352    }
 353 }
 354
 355
 356 void
 357 _mesa_init_texgen_dispatch(struct _glapi_table *disp)
 358 {
 359    SET_GetTexGendv(disp, _mesa_GetTexGendv);
 360    SET_GetTexGenfv(disp, _mesa_GetTexGenfv);
 361    SET_GetTexGeniv(disp, _mesa_GetTexGeniv);
 362    SET_TexGend(disp, _mesa_TexGend);
 363    SET_TexGendv(disp, _mesa_TexGendv);
 364    SET_TexGenf(disp, _mesa_TexGenf);
 365    SET_TexGenfv(disp, _mesa_TexGenfv);
 366    SET_TexGeni(disp, _mesa_TexGeni);
 367    SET_TexGeniv(disp, _mesa_TexGeniv);
 368 }
 369
 370
 371 #endif /* FEATURE_texgen */