reactos/dll/opengl/mesa/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_texture_unit *texUnit, GLenum coord)
  52 {
  53    switch (coord) {
  54    case GL_S:
  55       return &texUnit->GenS;
  56    case GL_T:
  57       return &texUnit->GenT;
  58    case GL_R:
  59       return &texUnit->GenR;
  60    case GL_Q:
  61       return &texUnit->GenQ;
  62    default:
  63       return NULL;
  64    }
  65 }
  66
  67
  68 void GLAPIENTRY
  69 _mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params )
  70 {
  71    struct gl_texture_unit *texUnit;
  72    struct gl_texgen *texgen;
  73    GET_CURRENT_CONTEXT(ctx);
  74    ASSERT_OUTSIDE_BEGIN_END(ctx);
  75
  76    if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
  77       _mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
  78                   _mesa_lookup_enum_by_nr(coord),
  79                   _mesa_lookup_enum_by_nr(pname),
  80                   *params,
  81                   _mesa_lookup_enum_by_nr((GLenum) (GLint) *params));
  82
  83    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
  84       _mesa_error(ctx, GL_INVALID_OPERATION, "glTexGen(current unit)");
  85       return;
  86    }
  87
  88    texUnit = _mesa_get_current_tex_unit(ctx);
  89
  90    texgen = get_texgen(texUnit, coord);
  91    if (!texgen) {
  92       _mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)");
  93       return;
  94    }
  95
  96    switch (pname) {
  97    case GL_TEXTURE_GEN_MODE:
  98       {
  99          GLenum mode = (GLenum) (GLint) params[0];
 100          GLbitfield bit = 0x0;
 101          if (texgen->Mode == mode)
 102             return;
 103          switch (mode) {
 104          case GL_OBJECT_LINEAR:
 105             bit = TEXGEN_OBJ_LINEAR;
 106             break;
 107          case GL_EYE_LINEAR:
 108             bit = TEXGEN_EYE_LINEAR;
 109             break;
 110          case GL_SPHERE_MAP:
 111             if (coord == GL_S || coord == GL_T)
 112                bit = TEXGEN_SPHERE_MAP;
 113             break;
 114          case GL_REFLECTION_MAP_NV:
 115             if (coord != GL_Q)
 116                bit = TEXGEN_REFLECTION_MAP_NV;
 117             break;
 118          case GL_NORMAL_MAP_NV:
 119             if (coord != GL_Q)
 120                bit = TEXGEN_NORMAL_MAP_NV;
 121             break;
 122          default:
 123             ; /* nop */
 124          }
 125          if (!bit) {
 126             _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
 127             return;
 128          }
 129          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 130          texgen->Mode = mode;
 131          texgen->_ModeBit = bit;
 132       }
 133       break;
 134
 135    case GL_OBJECT_PLANE:
 136       {
 137          if (TEST_EQ_4V(texgen->ObjectPlane, params))
 138             return;
 139          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 140          COPY_4FV(texgen->ObjectPlane, params);
 141       }
 142       break;
 143
 144    case GL_EYE_PLANE:
 145       {
 146          GLfloat tmp[4];
 147          /* Transform plane equation by the inverse modelview matrix */
 148          if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
 149             _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
 150          }
 151          _mesa_transform_vector(tmp, params,
 152                                 ctx->ModelviewMatrixStack.Top->inv);
 153          if (TEST_EQ_4V(texgen->EyePlane, tmp))
 154             return;
 155          FLUSH_VERTICES(ctx, _NEW_TEXTURE);
 156          COPY_4FV(texgen->EyePlane, tmp);
 157       }
 158       break;
 159
 160    default:
 161       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
 162       return;
 163    }
 164
 165    if (ctx->Driver.TexGen)
 166       ctx->Driver.TexGen( ctx, coord, pname, params );
 167 }
 168
 169
 170 static void GLAPIENTRY
 171 _mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
 172 {
 173    GLfloat p[4];
 174    p[0] = (GLfloat) params[0];
 175    if (pname == GL_TEXTURE_GEN_MODE) {
 176       p[1] = p[2] = p[3] = 0.0F;
 177    }
 178    else {
 179       p[1] = (GLfloat) params[1];
 180       p[2] = (GLfloat) params[2];
 181       p[3] = (GLfloat) params[3];
 182    }
 183    _mesa_TexGenfv(coord, pname, p);
 184 }
 185
 186
 187 static void GLAPIENTRY
 188 _mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
 189 {
 190    GLfloat p[4];
 191    p[0] = (GLfloat) param;
 192    p[1] = p[2] = p[3] = 0.0F;
 193    _mesa_TexGenfv( coord, pname, p );
 194 }
 195
 196 #if FEATURE_ES1
 197
 198 void GLAPIENTRY
 199 _es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
 200 {
 201    ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
 202    _mesa_GetTexGenfv(GL_S, pname, params);
 203 }
 204
 205
 206 void GLAPIENTRY
 207 _es_TexGenf(GLenum coord, GLenum pname, GLfloat param)
 208 {
 209    ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
 210    /* set S, T, and R at the same time */
 211    _mesa_TexGenf(GL_S, pname, param);
 212    _mesa_TexGenf(GL_T, pname, param);
 213    _mesa_TexGenf(GL_R, pname, param);
 214 }
 215
 216
 217 void GLAPIENTRY
 218 _es_TexGenfv(GLenum coord, GLenum pname, const GLfloat *params)
 219 {
 220    ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
 221    /* set S, T, and R at the same time */
 222    _mesa_TexGenfv(GL_S, pname, params);
 223    _mesa_TexGenfv(GL_T, pname, params);
 224    _mesa_TexGenfv(GL_R, pname, params);
 225 }
 226
 227 #endif
 228
 229 static void GLAPIENTRY
 230 _mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
 231 {
 232    GLfloat p[4];
 233    p[0] = (GLfloat) params[0];
 234    if (pname == GL_TEXTURE_GEN_MODE) {
 235       p[1] = p[2] = p[3] = 0.0F;
 236    }
 237    else {
 238       p[1] = (GLfloat) params[1];
 239       p[2] = (GLfloat) params[2];
 240       p[3] = (GLfloat) params[3];
 241    }
 242    _mesa_TexGenfv( coord, pname, p );
 243 }
 244
 245
 246 void GLAPIENTRY
 247 _mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
 248 {
 249    GLfloat p[4];
 250    p[0] = param;
 251    p[1] = p[2] = p[3] = 0.0F;
 252    _mesa_TexGenfv(coord, pname, p);
 253 }
 254
 255
 256 void GLAPIENTRY
 257 _mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
 258 {
 259    GLint p[4];
 260    p[0] = param;
 261    p[1] = p[2] = p[3] = 0;
 262    _mesa_TexGeniv( coord, pname, p );
 263 }
 264
 265
 266
 267 static void GLAPIENTRY
 268 _mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
 269 {
 270    struct gl_texture_unit *texUnit;
 271    struct gl_texgen *texgen;
 272    GET_CURRENT_CONTEXT(ctx);
 273    ASSERT_OUTSIDE_BEGIN_END(ctx);
 274
 275    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 276       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGendv(current unit)");
 277       return;
 278    }
 279
 280    texUnit = _mesa_get_current_tex_unit(ctx);
 281
 282    texgen = get_texgen(texUnit, coord);
 283    if (!texgen) {
 284       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)");
 285       return;
 286    }
 287
 288    switch (pname) {
 289    case GL_TEXTURE_GEN_MODE:
 290       params[0] = ENUM_TO_DOUBLE(texgen->Mode);
 291       break;
 292    case GL_OBJECT_PLANE:
 293       COPY_4V(params, texgen->ObjectPlane);
 294       break;
 295    case GL_EYE_PLANE:
 296       COPY_4V(params, texgen->EyePlane);
 297       break;
 298    default:
 299       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
 300    }
 301 }
 302
 303
 304
 305 void GLAPIENTRY
 306 _mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
 307 {
 308    struct gl_texture_unit *texUnit;
 309    struct gl_texgen *texgen;
 310    GET_CURRENT_CONTEXT(ctx);
 311    ASSERT_OUTSIDE_BEGIN_END(ctx);
 312
 313    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 314       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGenfv(current unit)");
 315       return;
 316    }
 317
 318    texUnit = _mesa_get_current_tex_unit(ctx);
 319
 320    texgen = get_texgen(texUnit, coord);
 321    if (!texgen) {
 322       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)");
 323       return;
 324    }
 325
 326    switch (pname) {
 327    case GL_TEXTURE_GEN_MODE:
 328       params[0] = ENUM_TO_FLOAT(texgen->Mode);
 329       break;
 330    case GL_OBJECT_PLANE:
 331       COPY_4V(params, texgen->ObjectPlane);
 332       break;
 333    case GL_EYE_PLANE:
 334       COPY_4V(params, texgen->EyePlane);
 335       break;
 336    default:
 337       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
 338    }
 339 }
 340
 341
 342
 343 static void GLAPIENTRY
 344 _mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
 345 {
 346    struct gl_texture_unit *texUnit;
 347    struct gl_texgen *texgen;
 348    GET_CURRENT_CONTEXT(ctx);
 349    ASSERT_OUTSIDE_BEGIN_END(ctx);
 350
 351    if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
 352       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGeniv(current unit)");
 353       return;
 354    }
 355
 356    texUnit = _mesa_get_current_tex_unit(ctx);
 357
 358    texgen = get_texgen(texUnit, coord);
 359    if (!texgen) {
 360       _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)");
 361       return;
 362    }
 363
 364    switch (pname) {
 365    case GL_TEXTURE_GEN_MODE:
 366       params[0] = texgen->Mode;
 367       break;
 368    case GL_OBJECT_PLANE:
 369       params[0] = (GLint) texgen->ObjectPlane[0];
 370       params[1] = (GLint) texgen->ObjectPlane[1];
 371       params[2] = (GLint) texgen->ObjectPlane[2];
 372       params[3] = (GLint) texgen->ObjectPlane[3];
 373       break;
 374    case GL_EYE_PLANE:
 375       params[0] = (GLint) texgen->EyePlane[0];
 376       params[1] = (GLint) texgen->EyePlane[1];
 377       params[2] = (GLint) texgen->EyePlane[2];
 378       params[3] = (GLint) texgen->EyePlane[3];
 379       break;
 380    default:
 381       _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
 382    }
 383 }
 384
 385
 386 void
 387 _mesa_init_texgen_dispatch(struct _glapi_table *disp)
 388 {
 389    SET_GetTexGendv(disp, _mesa_GetTexGendv);
 390    SET_GetTexGenfv(disp, _mesa_GetTexGenfv);
 391    SET_GetTexGeniv(disp, _mesa_GetTexGeniv);
 392    SET_TexGend(disp, _mesa_TexGend);
 393    SET_TexGendv(disp, _mesa_TexGendv);
 394    SET_TexGenf(disp, _mesa_TexGenf);
 395    SET_TexGenfv(disp, _mesa_TexGenfv);
 396    SET_TexGeni(disp, _mesa_TexGeni);
 397    SET_TexGeniv(disp, _mesa_TexGeniv);
 398 }
 399
 400
 401 #endif /* FEATURE_texgen */