src/mesa/main/rastpos.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5.3
   4  *
   5  * Copyright (C) 1999-2007  Brian Paul   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  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /**
  27  * \file rastpos.c
  28  * Raster position operations.
  29  */
  30
  31 #include "glheader.h"
  32 #include "context.h"
  33 #include "feedback.h"
  34 #include "macros.h"
  35 #include "rastpos.h"
  36 #include "state.h"
  37 #include "glapi/dispatch.h"
  38
  39
  40 #if FEATURE_rastpos
  41
  42
  43 /**
  44  * Helper function for all the RasterPos functions.
  45  */
  46 static void
  47 rasterpos(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
  48 {
  49    GET_CURRENT_CONTEXT(ctx);
  50    GLfloat p[4];
  51
  52    p[0] = x;
  53    p[1] = y;
  54    p[2] = z;
  55    p[3] = w;
  56
  57    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  58    FLUSH_CURRENT(ctx, 0);
  59
  60    if (ctx->NewState)
  61       _mesa_update_state( ctx );
  62
  63    ctx->Driver.RasterPos(ctx, p);
  64 }
  65
  66
  67 static void GLAPIENTRY
  68 _mesa_RasterPos2d(GLdouble x, GLdouble y)
  69 {
  70    rasterpos((GLfloat)x, (GLfloat)y, (GLfloat)0.0, (GLfloat)1.0);
  71 }
  72
  73 static void GLAPIENTRY
  74 _mesa_RasterPos2f(GLfloat x, GLfloat y)
  75 {
  76    rasterpos(x, y, 0.0F, 1.0F);
  77 }
  78
  79 static void GLAPIENTRY
  80 _mesa_RasterPos2i(GLint x, GLint y)
  81 {
  82    rasterpos((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);
  83 }
  84
  85 static void GLAPIENTRY
  86 _mesa_RasterPos2s(GLshort x, GLshort y)
  87 {
  88    rasterpos(x, y, 0.0F, 1.0F);
  89 }
  90
  91 static void GLAPIENTRY
  92 _mesa_RasterPos3d(GLdouble x, GLdouble y, GLdouble z)
  93 {
  94    rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);
  95 }
  96
  97 static void GLAPIENTRY
  98 _mesa_RasterPos3f(GLfloat x, GLfloat y, GLfloat z)
  99 {
 100    rasterpos(x, y, z, 1.0F);
 101 }
 102
 103 static void GLAPIENTRY
 104 _mesa_RasterPos3i(GLint x, GLint y, GLint z)
 105 {
 106    rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);
 107 }
 108
 109 static void GLAPIENTRY
 110 _mesa_RasterPos3s(GLshort x, GLshort y, GLshort z)
 111 {
 112    rasterpos(x, y, z, 1.0F);
 113 }
 114
 115 static void GLAPIENTRY
 116 _mesa_RasterPos4d(GLdouble x, GLdouble y, GLdouble z, GLdouble w)
 117 {
 118    rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
 119 }
 120
 121 static void GLAPIENTRY
 122 _mesa_RasterPos4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 123 {
 124    rasterpos(x, y, z, w);
 125 }
 126
 127 static void GLAPIENTRY
 128 _mesa_RasterPos4i(GLint x, GLint y, GLint z, GLint w)
 129 {
 130    rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
 131 }
 132
 133 static void GLAPIENTRY
 134 _mesa_RasterPos4s(GLshort x, GLshort y, GLshort z, GLshort w)
 135 {
 136    rasterpos(x, y, z, w);
 137 }
 138
 139 static void GLAPIENTRY
 140 _mesa_RasterPos2dv(const GLdouble *v)
 141 {
 142    rasterpos((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);
 143 }
 144
 145 static void GLAPIENTRY
 146 _mesa_RasterPos2fv(const GLfloat *v)
 147 {
 148    rasterpos(v[0], v[1], 0.0F, 1.0F);
 149 }
 150
 151 static void GLAPIENTRY
 152 _mesa_RasterPos2iv(const GLint *v)
 153 {
 154    rasterpos((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);
 155 }
 156
 157 static void GLAPIENTRY
 158 _mesa_RasterPos2sv(const GLshort *v)
 159 {
 160    rasterpos(v[0], v[1], 0.0F, 1.0F);
 161 }
 162
 163 static void GLAPIENTRY
 164 _mesa_RasterPos3dv(const GLdouble *v)
 165 {
 166    rasterpos((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);
 167 }
 168
 169 static void GLAPIENTRY
 170 _mesa_RasterPos3fv(const GLfloat *v)
 171 {
 172    rasterpos(v[0], v[1], v[2], 1.0F);
 173 }
 174
 175 static void GLAPIENTRY
 176 _mesa_RasterPos3iv(const GLint *v)
 177 {
 178    rasterpos((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);
 179 }
 180
 181 static void GLAPIENTRY
 182 _mesa_RasterPos3sv(const GLshort *v)
 183 {
 184    rasterpos(v[0], v[1], v[2], 1.0F);
 185 }
 186
 187 static void GLAPIENTRY
 188 _mesa_RasterPos4dv(const GLdouble *v)
 189 {
 190    rasterpos((GLfloat) v[0], (GLfloat) v[1],
 191                      (GLfloat) v[2], (GLfloat) v[3]);
 192 }
 193
 194 static void GLAPIENTRY
 195 _mesa_RasterPos4fv(const GLfloat *v)
 196 {
 197    rasterpos(v[0], v[1], v[2], v[3]);
 198 }
 199
 200 static void GLAPIENTRY
 201 _mesa_RasterPos4iv(const GLint *v)
 202 {
 203    rasterpos((GLfloat) v[0], (GLfloat) v[1],
 204                      (GLfloat) v[2], (GLfloat) v[3]);
 205 }
 206
 207 static void GLAPIENTRY
 208 _mesa_RasterPos4sv(const GLshort *v)
 209 {
 210    rasterpos(v[0], v[1], v[2], v[3]);
 211 }
 212
 213
 214 /**********************************************************************/
 215 /***           GL_ARB_window_pos / GL_MESA_window_pos               ***/
 216 /**********************************************************************/
 217
 218
 219 /**
 220  * All glWindowPosMESA and glWindowPosARB commands call this function to
 221  * update the current raster position.
 222  */
 223 static void
 224 window_pos3f(GLfloat x, GLfloat y, GLfloat z)
 225 {
 226    GET_CURRENT_CONTEXT(ctx);
 227    GLfloat z2;
 228
 229    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 230    FLUSH_CURRENT(ctx, 0);
 231
 232    z2 = CLAMP(z, 0.0F, 1.0F) * (ctx->Viewport.Far - ctx->Viewport.Near)
 233       + ctx->Viewport.Near;
 234
 235    /* set raster position */
 236    ctx->Current.RasterPos[0] = x;
 237    ctx->Current.RasterPos[1] = y;
 238    ctx->Current.RasterPos[2] = z2;
 239    ctx->Current.RasterPos[3] = 1.0F;
 240
 241    ctx->Current.RasterPosValid = GL_TRUE;
 242
 243    if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
 244       ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];
 245    else
 246       ctx->Current.RasterDistance = 0.0;
 247
 248    /* raster color = current color or index */
 249    if (ctx->Visual.rgbMode) {
 250       ctx->Current.RasterColor[0]
 251          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][0], 0.0F, 1.0F);
 252       ctx->Current.RasterColor[1]
 253          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][1], 0.0F, 1.0F);
 254       ctx->Current.RasterColor[2]
 255          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][2], 0.0F, 1.0F);
 256       ctx->Current.RasterColor[3]
 257          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][3], 0.0F, 1.0F);
 258       ctx->Current.RasterSecondaryColor[0]
 259          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][0], 0.0F, 1.0F);
 260       ctx->Current.RasterSecondaryColor[1]
 261          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][1], 0.0F, 1.0F);
 262       ctx->Current.RasterSecondaryColor[2]
 263          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][2], 0.0F, 1.0F);
 264       ctx->Current.RasterSecondaryColor[3]
 265          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][3], 0.0F, 1.0F);
 266    }
 267    else {
 268       ctx->Current.RasterIndex
 269          = ctx->Current.Attrib[VERT_ATTRIB_COLOR_INDEX][0];
 270    }
 271
 272    /* raster texcoord = current texcoord */
 273    {
 274       GLuint texSet;
 275       for (texSet = 0; texSet < ctx->Const.MaxTextureCoordUnits; texSet++) {
 276          COPY_4FV( ctx->Current.RasterTexCoords[texSet],
 277                   ctx->Current.Attrib[VERT_ATTRIB_TEX0 + texSet] );
 278       }
 279    }
 280
 281    if (ctx->RenderMode==GL_SELECT) {
 282       _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
 283    }
 284 }
 285
 286
 287 /* This is just to support the GL_MESA_window_pos version */
 288 static void
 289 window_pos4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 290 {
 291    GET_CURRENT_CONTEXT(ctx);
 292    window_pos3f(x, y, z);
 293    ctx->Current.RasterPos[3] = w;
 294 }
 295
 296
 297 static void GLAPIENTRY
 298 _mesa_WindowPos2dMESA(GLdouble x, GLdouble y)
 299 {
 300    window_pos4f((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);
 301 }
 302
 303 static void GLAPIENTRY
 304 _mesa_WindowPos2fMESA(GLfloat x, GLfloat y)
 305 {
 306    window_pos4f(x, y, 0.0F, 1.0F);
 307 }
 308
 309 static void GLAPIENTRY
 310 _mesa_WindowPos2iMESA(GLint x, GLint y)
 311 {
 312    window_pos4f((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);
 313 }
 314
 315 static void GLAPIENTRY
 316 _mesa_WindowPos2sMESA(GLshort x, GLshort y)
 317 {
 318    window_pos4f(x, y, 0.0F, 1.0F);
 319 }
 320
 321 static void GLAPIENTRY
 322 _mesa_WindowPos3dMESA(GLdouble x, GLdouble y, GLdouble z)
 323 {
 324    window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);
 325 }
 326
 327 static void GLAPIENTRY
 328 _mesa_WindowPos3fMESA(GLfloat x, GLfloat y, GLfloat z)
 329 {
 330    window_pos4f(x, y, z, 1.0F);
 331 }
 332
 333 static void GLAPIENTRY
 334 _mesa_WindowPos3iMESA(GLint x, GLint y, GLint z)
 335 {
 336    window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);
 337 }
 338
 339 static void GLAPIENTRY
 340 _mesa_WindowPos3sMESA(GLshort x, GLshort y, GLshort z)
 341 {
 342    window_pos4f(x, y, z, 1.0F);
 343 }
 344
 345 static void GLAPIENTRY
 346 _mesa_WindowPos4dMESA(GLdouble x, GLdouble y, GLdouble z, GLdouble w)
 347 {
 348    window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
 349 }
 350
 351 static void GLAPIENTRY
 352 _mesa_WindowPos4fMESA(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 353 {
 354    window_pos4f(x, y, z, w);
 355 }
 356
 357 static void GLAPIENTRY
 358 _mesa_WindowPos4iMESA(GLint x, GLint y, GLint z, GLint w)
 359 {
 360    window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
 361 }
 362
 363 static void GLAPIENTRY
 364 _mesa_WindowPos4sMESA(GLshort x, GLshort y, GLshort z, GLshort w)
 365 {
 366    window_pos4f(x, y, z, w);
 367 }
 368
 369 static void GLAPIENTRY
 370 _mesa_WindowPos2dvMESA(const GLdouble *v)
 371 {
 372    window_pos4f((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);
 373 }
 374
 375 static void GLAPIENTRY
 376 _mesa_WindowPos2fvMESA(const GLfloat *v)
 377 {
 378    window_pos4f(v[0], v[1], 0.0F, 1.0F);
 379 }
 380
 381 static void GLAPIENTRY
 382 _mesa_WindowPos2ivMESA(const GLint *v)
 383 {
 384    window_pos4f((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);
 385 }
 386
 387 static void GLAPIENTRY
 388 _mesa_WindowPos2svMESA(const GLshort *v)
 389 {
 390    window_pos4f(v[0], v[1], 0.0F, 1.0F);
 391 }
 392
 393 static void GLAPIENTRY
 394 _mesa_WindowPos3dvMESA(const GLdouble *v)
 395 {
 396    window_pos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);
 397 }
 398
 399 static void GLAPIENTRY
 400 _mesa_WindowPos3fvMESA(const GLfloat *v)
 401 {
 402    window_pos4f(v[0], v[1], v[2], 1.0);
 403 }
 404
 405 static void GLAPIENTRY
 406 _mesa_WindowPos3ivMESA(const GLint *v)
 407 {
 408    window_pos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);
 409 }
 410
 411 static void GLAPIENTRY
 412 _mesa_WindowPos3svMESA(const GLshort *v)
 413 {
 414    window_pos4f(v[0], v[1], v[2], 1.0F);
 415 }
 416
 417 static void GLAPIENTRY
 418 _mesa_WindowPos4dvMESA(const GLdouble *v)
 419 {
 420    window_pos4f((GLfloat) v[0], (GLfloat) v[1],
 421                          (GLfloat) v[2], (GLfloat) v[3]);
 422 }
 423
 424 static void GLAPIENTRY
 425 _mesa_WindowPos4fvMESA(const GLfloat *v)
 426 {
 427    window_pos4f(v[0], v[1], v[2], v[3]);
 428 }
 429
 430 static void GLAPIENTRY
 431 _mesa_WindowPos4ivMESA(const GLint *v)
 432 {
 433    window_pos4f((GLfloat) v[0], (GLfloat) v[1],
 434                          (GLfloat) v[2], (GLfloat) v[3]);
 435 }
 436
 437 static void GLAPIENTRY
 438 _mesa_WindowPos4svMESA(const GLshort *v)
 439 {
 440    window_pos4f(v[0], v[1], v[2], v[3]);
 441 }
 442
 443
 444 #if 0
 445
 446 /*
 447  * OpenGL implementation of glWindowPos*MESA()
 448  */
 449 void glWindowPos4fMESA( GLfloat x, GLfloat y, GLfloat z, GLfloat w )
 450 {
 451    GLfloat fx, fy;
 452
 453    /* Push current matrix mode and viewport attributes */
 454    glPushAttrib( GL_TRANSFORM_BIT | GL_VIEWPORT_BIT );
 455
 456    /* Setup projection parameters */
 457    glMatrixMode( GL_PROJECTION );
 458    glPushMatrix();
 459    glLoadIdentity();
 460    glMatrixMode( GL_MODELVIEW );
 461    glPushMatrix();
 462    glLoadIdentity();
 463
 464    glDepthRange( z, z );
 465    glViewport( (int) x - 1, (int) y - 1, 2, 2 );
 466
 467    /* set the raster (window) position */
 468    fx = x - (int) x;
 469    fy = y - (int) y;
 470    glRasterPos4f( fx, fy, 0.0, w );
 471
 472    /* restore matrices, viewport and matrix mode */
 473    glPopMatrix();
 474    glMatrixMode( GL_PROJECTION );
 475    glPopMatrix();
 476
 477    glPopAttrib();
 478 }
 479
 480 #endif
 481
 482
 483 void
 484 _mesa_init_rastpos_dispatch(struct _glapi_table *disp)
 485 {
 486    SET_RasterPos2f(disp, _mesa_RasterPos2f);
 487    SET_RasterPos2fv(disp, _mesa_RasterPos2fv);
 488    SET_RasterPos2i(disp, _mesa_RasterPos2i);
 489    SET_RasterPos2iv(disp, _mesa_RasterPos2iv);
 490    SET_RasterPos2d(disp, _mesa_RasterPos2d);
 491    SET_RasterPos2dv(disp, _mesa_RasterPos2dv);
 492    SET_RasterPos2s(disp, _mesa_RasterPos2s);
 493    SET_RasterPos2sv(disp, _mesa_RasterPos2sv);
 494    SET_RasterPos3d(disp, _mesa_RasterPos3d);
 495    SET_RasterPos3dv(disp, _mesa_RasterPos3dv);
 496    SET_RasterPos3f(disp, _mesa_RasterPos3f);
 497    SET_RasterPos3fv(disp, _mesa_RasterPos3fv);
 498    SET_RasterPos3i(disp, _mesa_RasterPos3i);
 499    SET_RasterPos3iv(disp, _mesa_RasterPos3iv);
 500    SET_RasterPos3s(disp, _mesa_RasterPos3s);
 501    SET_RasterPos3sv(disp, _mesa_RasterPos3sv);
 502    SET_RasterPos4d(disp, _mesa_RasterPos4d);
 503    SET_RasterPos4dv(disp, _mesa_RasterPos4dv);
 504    SET_RasterPos4f(disp, _mesa_RasterPos4f);
 505    SET_RasterPos4fv(disp, _mesa_RasterPos4fv);
 506    SET_RasterPos4i(disp, _mesa_RasterPos4i);
 507    SET_RasterPos4iv(disp, _mesa_RasterPos4iv);
 508    SET_RasterPos4s(disp, _mesa_RasterPos4s);
 509    SET_RasterPos4sv(disp, _mesa_RasterPos4sv);
 510
 511    /* 197. GL_MESA_window_pos */
 512    SET_WindowPos2dMESA(disp, _mesa_WindowPos2dMESA);
 513    SET_WindowPos2dvMESA(disp, _mesa_WindowPos2dvMESA);
 514    SET_WindowPos2fMESA(disp, _mesa_WindowPos2fMESA);
 515    SET_WindowPos2fvMESA(disp, _mesa_WindowPos2fvMESA);
 516    SET_WindowPos2iMESA(disp, _mesa_WindowPos2iMESA);
 517    SET_WindowPos2ivMESA(disp, _mesa_WindowPos2ivMESA);
 518    SET_WindowPos2sMESA(disp, _mesa_WindowPos2sMESA);
 519    SET_WindowPos2svMESA(disp, _mesa_WindowPos2svMESA);
 520    SET_WindowPos3dMESA(disp, _mesa_WindowPos3dMESA);
 521    SET_WindowPos3dvMESA(disp, _mesa_WindowPos3dvMESA);
 522    SET_WindowPos3fMESA(disp, _mesa_WindowPos3fMESA);
 523    SET_WindowPos3fvMESA(disp, _mesa_WindowPos3fvMESA);
 524    SET_WindowPos3iMESA(disp, _mesa_WindowPos3iMESA);
 525    SET_WindowPos3ivMESA(disp, _mesa_WindowPos3ivMESA);
 526    SET_WindowPos3sMESA(disp, _mesa_WindowPos3sMESA);
 527    SET_WindowPos3svMESA(disp, _mesa_WindowPos3svMESA);
 528    SET_WindowPos4dMESA(disp, _mesa_WindowPos4dMESA);
 529    SET_WindowPos4dvMESA(disp, _mesa_WindowPos4dvMESA);
 530    SET_WindowPos4fMESA(disp, _mesa_WindowPos4fMESA);
 531    SET_WindowPos4fvMESA(disp, _mesa_WindowPos4fvMESA);
 532    SET_WindowPos4iMESA(disp, _mesa_WindowPos4iMESA);
 533    SET_WindowPos4ivMESA(disp, _mesa_WindowPos4ivMESA);
 534    SET_WindowPos4sMESA(disp, _mesa_WindowPos4sMESA);
 535    SET_WindowPos4svMESA(disp, _mesa_WindowPos4svMESA);
 536 }
 537
 538
 539 #endif /* FEATURE_rastpos */
 540
 541
 542 /**********************************************************************/
 543 /** \name Initialization                                              */
 544 /**********************************************************************/
 545 /*@{*/
 546
 547 /**
 548  * Initialize the context current raster position information.
 549  *
 550  * \param ctx GL context.
 551  *
 552  * Initialize the current raster position information in
 553  * __GLcontextRec::Current, and adds the extension entry points to the
 554  * dispatcher.
 555  */
 556 void _mesa_init_rastpos( GLcontext * ctx )
 557 {
 558    int i;
 559
 560    ASSIGN_4V( ctx->Current.RasterPos, 0.0, 0.0, 0.0, 1.0 );
 561    ctx->Current.RasterDistance = 0.0;
 562    ASSIGN_4V( ctx->Current.RasterColor, 1.0, 1.0, 1.0, 1.0 );
 563    ASSIGN_4V( ctx->Current.RasterSecondaryColor, 0.0, 0.0, 0.0, 1.0 );
 564    ctx->Current.RasterIndex = 1.0;
 565    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
 566       ASSIGN_4V( ctx->Current.RasterTexCoords[i], 0.0, 0.0, 0.0, 1.0 );
 567    ctx->Current.RasterPosValid = GL_TRUE;
 568 }
 569
 570 /*@}*/