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 "main/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    ctx->Current.RasterColor[0]
 250       = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][0], 0.0F, 1.0F);
 251    ctx->Current.RasterColor[1]
 252       = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][1], 0.0F, 1.0F);
 253    ctx->Current.RasterColor[2]
 254       = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][2], 0.0F, 1.0F);
 255    ctx->Current.RasterColor[3]
 256       = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][3], 0.0F, 1.0F);
 257    ctx->Current.RasterSecondaryColor[0]
 258       = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][0], 0.0F, 1.0F);
 259    ctx->Current.RasterSecondaryColor[1]
 260       = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][1], 0.0F, 1.0F);
 261    ctx->Current.RasterSecondaryColor[2]
 262       = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][2], 0.0F, 1.0F);
 263    ctx->Current.RasterSecondaryColor[3]
 264       = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][3], 0.0F, 1.0F);
 265
 266    /* raster texcoord = current texcoord */
 267    {
 268       GLuint texSet;
 269       for (texSet = 0; texSet < ctx->Const.MaxTextureCoordUnits; texSet++) {
 270          assert(texSet < Elements(ctx->Current.RasterTexCoords));
 271          COPY_4FV( ctx->Current.RasterTexCoords[texSet],
 272                   ctx->Current.Attrib[VERT_ATTRIB_TEX0 + texSet] );
 273       }
 274    }
 275
 276    if (ctx->RenderMode==GL_SELECT) {
 277       _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
 278    }
 279 }
 280
 281
 282 /* This is just to support the GL_MESA_window_pos version */
 283 static void
 284 window_pos4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 285 {
 286    GET_CURRENT_CONTEXT(ctx);
 287    window_pos3f(x, y, z);
 288    ctx->Current.RasterPos[3] = w;
 289 }
 290
 291
 292 static void GLAPIENTRY
 293 _mesa_WindowPos2dMESA(GLdouble x, GLdouble y)
 294 {
 295    window_pos4f((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);
 296 }
 297
 298 static void GLAPIENTRY
 299 _mesa_WindowPos2fMESA(GLfloat x, GLfloat y)
 300 {
 301    window_pos4f(x, y, 0.0F, 1.0F);
 302 }
 303
 304 static void GLAPIENTRY
 305 _mesa_WindowPos2iMESA(GLint x, GLint y)
 306 {
 307    window_pos4f((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);
 308 }
 309
 310 static void GLAPIENTRY
 311 _mesa_WindowPos2sMESA(GLshort x, GLshort y)
 312 {
 313    window_pos4f(x, y, 0.0F, 1.0F);
 314 }
 315
 316 static void GLAPIENTRY
 317 _mesa_WindowPos3dMESA(GLdouble x, GLdouble y, GLdouble z)
 318 {
 319    window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);
 320 }
 321
 322 static void GLAPIENTRY
 323 _mesa_WindowPos3fMESA(GLfloat x, GLfloat y, GLfloat z)
 324 {
 325    window_pos4f(x, y, z, 1.0F);
 326 }
 327
 328 static void GLAPIENTRY
 329 _mesa_WindowPos3iMESA(GLint x, GLint y, GLint z)
 330 {
 331    window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);
 332 }
 333
 334 static void GLAPIENTRY
 335 _mesa_WindowPos3sMESA(GLshort x, GLshort y, GLshort z)
 336 {
 337    window_pos4f(x, y, z, 1.0F);
 338 }
 339
 340 static void GLAPIENTRY
 341 _mesa_WindowPos4dMESA(GLdouble x, GLdouble y, GLdouble z, GLdouble w)
 342 {
 343    window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
 344 }
 345
 346 static void GLAPIENTRY
 347 _mesa_WindowPos4fMESA(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 348 {
 349    window_pos4f(x, y, z, w);
 350 }
 351
 352 static void GLAPIENTRY
 353 _mesa_WindowPos4iMESA(GLint x, GLint y, GLint z, GLint w)
 354 {
 355    window_pos4f((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
 356 }
 357
 358 static void GLAPIENTRY
 359 _mesa_WindowPos4sMESA(GLshort x, GLshort y, GLshort z, GLshort w)
 360 {
 361    window_pos4f(x, y, z, w);
 362 }
 363
 364 static void GLAPIENTRY
 365 _mesa_WindowPos2dvMESA(const GLdouble *v)
 366 {
 367    window_pos4f((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);
 368 }
 369
 370 static void GLAPIENTRY
 371 _mesa_WindowPos2fvMESA(const GLfloat *v)
 372 {
 373    window_pos4f(v[0], v[1], 0.0F, 1.0F);
 374 }
 375
 376 static void GLAPIENTRY
 377 _mesa_WindowPos2ivMESA(const GLint *v)
 378 {
 379    window_pos4f((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);
 380 }
 381
 382 static void GLAPIENTRY
 383 _mesa_WindowPos2svMESA(const GLshort *v)
 384 {
 385    window_pos4f(v[0], v[1], 0.0F, 1.0F);
 386 }
 387
 388 static void GLAPIENTRY
 389 _mesa_WindowPos3dvMESA(const GLdouble *v)
 390 {
 391    window_pos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);
 392 }
 393
 394 static void GLAPIENTRY
 395 _mesa_WindowPos3fvMESA(const GLfloat *v)
 396 {
 397    window_pos4f(v[0], v[1], v[2], 1.0);
 398 }
 399
 400 static void GLAPIENTRY
 401 _mesa_WindowPos3ivMESA(const GLint *v)
 402 {
 403    window_pos4f((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);
 404 }
 405
 406 static void GLAPIENTRY
 407 _mesa_WindowPos3svMESA(const GLshort *v)
 408 {
 409    window_pos4f(v[0], v[1], v[2], 1.0F);
 410 }
 411
 412 static void GLAPIENTRY
 413 _mesa_WindowPos4dvMESA(const GLdouble *v)
 414 {
 415    window_pos4f((GLfloat) v[0], (GLfloat) v[1],
 416                          (GLfloat) v[2], (GLfloat) v[3]);
 417 }
 418
 419 static void GLAPIENTRY
 420 _mesa_WindowPos4fvMESA(const GLfloat *v)
 421 {
 422    window_pos4f(v[0], v[1], v[2], v[3]);
 423 }
 424
 425 static void GLAPIENTRY
 426 _mesa_WindowPos4ivMESA(const GLint *v)
 427 {
 428    window_pos4f((GLfloat) v[0], (GLfloat) v[1],
 429                          (GLfloat) v[2], (GLfloat) v[3]);
 430 }
 431
 432 static void GLAPIENTRY
 433 _mesa_WindowPos4svMESA(const GLshort *v)
 434 {
 435    window_pos4f(v[0], v[1], v[2], v[3]);
 436 }
 437
 438
 439 #if 0
 440
 441 /*
 442  * OpenGL implementation of glWindowPos*MESA()
 443  */
 444 void glWindowPos4fMESA( GLfloat x, GLfloat y, GLfloat z, GLfloat w )
 445 {
 446    GLfloat fx, fy;
 447
 448    /* Push current matrix mode and viewport attributes */
 449    glPushAttrib( GL_TRANSFORM_BIT | GL_VIEWPORT_BIT );
 450
 451    /* Setup projection parameters */
 452    glMatrixMode( GL_PROJECTION );
 453    glPushMatrix();
 454    glLoadIdentity();
 455    glMatrixMode( GL_MODELVIEW );
 456    glPushMatrix();
 457    glLoadIdentity();
 458
 459    glDepthRange( z, z );
 460    glViewport( (int) x - 1, (int) y - 1, 2, 2 );
 461
 462    /* set the raster (window) position */
 463    fx = x - (int) x;
 464    fy = y - (int) y;
 465    glRasterPos4f( fx, fy, 0.0, w );
 466
 467    /* restore matrices, viewport and matrix mode */
 468    glPopMatrix();
 469    glMatrixMode( GL_PROJECTION );
 470    glPopMatrix();
 471
 472    glPopAttrib();
 473 }
 474
 475 #endif
 476
 477
 478 void
 479 _mesa_init_rastpos_dispatch(struct _glapi_table *disp)
 480 {
 481    SET_RasterPos2f(disp, _mesa_RasterPos2f);
 482    SET_RasterPos2fv(disp, _mesa_RasterPos2fv);
 483    SET_RasterPos2i(disp, _mesa_RasterPos2i);
 484    SET_RasterPos2iv(disp, _mesa_RasterPos2iv);
 485    SET_RasterPos2d(disp, _mesa_RasterPos2d);
 486    SET_RasterPos2dv(disp, _mesa_RasterPos2dv);
 487    SET_RasterPos2s(disp, _mesa_RasterPos2s);
 488    SET_RasterPos2sv(disp, _mesa_RasterPos2sv);
 489    SET_RasterPos3d(disp, _mesa_RasterPos3d);
 490    SET_RasterPos3dv(disp, _mesa_RasterPos3dv);
 491    SET_RasterPos3f(disp, _mesa_RasterPos3f);
 492    SET_RasterPos3fv(disp, _mesa_RasterPos3fv);
 493    SET_RasterPos3i(disp, _mesa_RasterPos3i);
 494    SET_RasterPos3iv(disp, _mesa_RasterPos3iv);
 495    SET_RasterPos3s(disp, _mesa_RasterPos3s);
 496    SET_RasterPos3sv(disp, _mesa_RasterPos3sv);
 497    SET_RasterPos4d(disp, _mesa_RasterPos4d);
 498    SET_RasterPos4dv(disp, _mesa_RasterPos4dv);
 499    SET_RasterPos4f(disp, _mesa_RasterPos4f);
 500    SET_RasterPos4fv(disp, _mesa_RasterPos4fv);
 501    SET_RasterPos4i(disp, _mesa_RasterPos4i);
 502    SET_RasterPos4iv(disp, _mesa_RasterPos4iv);
 503    SET_RasterPos4s(disp, _mesa_RasterPos4s);
 504    SET_RasterPos4sv(disp, _mesa_RasterPos4sv);
 505
 506    /* 197. GL_MESA_window_pos */
 507    SET_WindowPos2dMESA(disp, _mesa_WindowPos2dMESA);
 508    SET_WindowPos2dvMESA(disp, _mesa_WindowPos2dvMESA);
 509    SET_WindowPos2fMESA(disp, _mesa_WindowPos2fMESA);
 510    SET_WindowPos2fvMESA(disp, _mesa_WindowPos2fvMESA);
 511    SET_WindowPos2iMESA(disp, _mesa_WindowPos2iMESA);
 512    SET_WindowPos2ivMESA(disp, _mesa_WindowPos2ivMESA);
 513    SET_WindowPos2sMESA(disp, _mesa_WindowPos2sMESA);
 514    SET_WindowPos2svMESA(disp, _mesa_WindowPos2svMESA);
 515    SET_WindowPos3dMESA(disp, _mesa_WindowPos3dMESA);
 516    SET_WindowPos3dvMESA(disp, _mesa_WindowPos3dvMESA);
 517    SET_WindowPos3fMESA(disp, _mesa_WindowPos3fMESA);
 518    SET_WindowPos3fvMESA(disp, _mesa_WindowPos3fvMESA);
 519    SET_WindowPos3iMESA(disp, _mesa_WindowPos3iMESA);
 520    SET_WindowPos3ivMESA(disp, _mesa_WindowPos3ivMESA);
 521    SET_WindowPos3sMESA(disp, _mesa_WindowPos3sMESA);
 522    SET_WindowPos3svMESA(disp, _mesa_WindowPos3svMESA);
 523    SET_WindowPos4dMESA(disp, _mesa_WindowPos4dMESA);
 524    SET_WindowPos4dvMESA(disp, _mesa_WindowPos4dvMESA);
 525    SET_WindowPos4fMESA(disp, _mesa_WindowPos4fMESA);
 526    SET_WindowPos4fvMESA(disp, _mesa_WindowPos4fvMESA);
 527    SET_WindowPos4iMESA(disp, _mesa_WindowPos4iMESA);
 528    SET_WindowPos4ivMESA(disp, _mesa_WindowPos4ivMESA);
 529    SET_WindowPos4sMESA(disp, _mesa_WindowPos4sMESA);
 530    SET_WindowPos4svMESA(disp, _mesa_WindowPos4svMESA);
 531 }
 532
 533
 534 #endif /* FEATURE_rastpos */
 535
 536
 537 /**********************************************************************/
 538 /** \name Initialization                                              */
 539 /**********************************************************************/
 540 /*@{*/
 541
 542 /**
 543  * Initialize the context current raster position information.
 544  *
 545  * \param ctx GL context.
 546  *
 547  * Initialize the current raster position information in
 548  * __struct gl_contextRec::Current, and adds the extension entry points to the
 549  * dispatcher.
 550  */
 551 void _mesa_init_rastpos( struct gl_context * ctx )
 552 {
 553    int i;
 554
 555    ASSIGN_4V( ctx->Current.RasterPos, 0.0, 0.0, 0.0, 1.0 );
 556    ctx->Current.RasterDistance = 0.0;
 557    ASSIGN_4V( ctx->Current.RasterColor, 1.0, 1.0, 1.0, 1.0 );
 558    ASSIGN_4V( ctx->Current.RasterSecondaryColor, 0.0, 0.0, 0.0, 1.0 );
 559    for (i = 0; i < Elements(ctx->Current.RasterTexCoords); i++)
 560       ASSIGN_4V( ctx->Current.RasterTexCoords[i], 0.0, 0.0, 0.0, 1.0 );
 561    ctx->Current.RasterPosValid = GL_TRUE;
 562 }
 563
 564 /*@}*/