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