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