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
  38
  39 /**
  40  * Helper function for all the RasterPos functions.
  41  */
  42 static void
  43 rasterpos(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
  44 {
  45    GET_CURRENT_CONTEXT(ctx);
  46    GLfloat p[4];
  47
  48    p[0] = x;
  49    p[1] = y;
  50    p[2] = z;
  51    p[3] = w;
  52
  53    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
  54    FLUSH_CURRENT(ctx, 0);
  55
  56    if (ctx->NewState)
  57       _mesa_update_state( ctx );
  58
  59    ctx->Driver.RasterPos(ctx, p);
  60 }
  61
  62
  63 void GLAPIENTRY
  64 _mesa_RasterPos2d(GLdouble x, GLdouble y)
  65 {
  66    rasterpos((GLfloat)x, (GLfloat)y, (GLfloat)0.0, (GLfloat)1.0);
  67 }
  68
  69 void GLAPIENTRY
  70 _mesa_RasterPos2f(GLfloat x, GLfloat y)
  71 {
  72    rasterpos(x, y, 0.0F, 1.0F);
  73 }
  74
  75 void GLAPIENTRY
  76 _mesa_RasterPos2i(GLint x, GLint y)
  77 {
  78    rasterpos((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);
  79 }
  80
  81 void GLAPIENTRY
  82 _mesa_RasterPos2s(GLshort x, GLshort y)
  83 {
  84    rasterpos(x, y, 0.0F, 1.0F);
  85 }
  86
  87 void GLAPIENTRY
  88 _mesa_RasterPos3d(GLdouble x, GLdouble y, GLdouble z)
  89 {
  90    rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);
  91 }
  92
  93 void GLAPIENTRY
  94 _mesa_RasterPos3f(GLfloat x, GLfloat y, GLfloat z)
  95 {
  96    rasterpos(x, y, z, 1.0F);
  97 }
  98
  99 void GLAPIENTRY
 100 _mesa_RasterPos3i(GLint x, GLint y, GLint z)
 101 {
 102    rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, 1.0F);
 103 }
 104
 105 void GLAPIENTRY
 106 _mesa_RasterPos3s(GLshort x, GLshort y, GLshort z)
 107 {
 108    rasterpos(x, y, z, 1.0F);
 109 }
 110
 111 void GLAPIENTRY
 112 _mesa_RasterPos4d(GLdouble x, GLdouble y, GLdouble z, GLdouble w)
 113 {
 114    rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
 115 }
 116
 117 void GLAPIENTRY
 118 _mesa_RasterPos4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 119 {
 120    rasterpos(x, y, z, w);
 121 }
 122
 123 void GLAPIENTRY
 124 _mesa_RasterPos4i(GLint x, GLint y, GLint z, GLint w)
 125 {
 126    rasterpos((GLfloat) x, (GLfloat) y, (GLfloat) z, (GLfloat) w);
 127 }
 128
 129 void GLAPIENTRY
 130 _mesa_RasterPos4s(GLshort x, GLshort y, GLshort z, GLshort w)
 131 {
 132    rasterpos(x, y, z, w);
 133 }
 134
 135 void GLAPIENTRY
 136 _mesa_RasterPos2dv(const GLdouble *v)
 137 {
 138    rasterpos((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);
 139 }
 140
 141 void GLAPIENTRY
 142 _mesa_RasterPos2fv(const GLfloat *v)
 143 {
 144    rasterpos(v[0], v[1], 0.0F, 1.0F);
 145 }
 146
 147 void GLAPIENTRY
 148 _mesa_RasterPos2iv(const GLint *v)
 149 {
 150    rasterpos((GLfloat) v[0], (GLfloat) v[1], 0.0F, 1.0F);
 151 }
 152
 153 void GLAPIENTRY
 154 _mesa_RasterPos2sv(const GLshort *v)
 155 {
 156    rasterpos(v[0], v[1], 0.0F, 1.0F);
 157 }
 158
 159 void GLAPIENTRY
 160 _mesa_RasterPos3dv(const GLdouble *v)
 161 {
 162    rasterpos((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);
 163 }
 164
 165 void GLAPIENTRY
 166 _mesa_RasterPos3fv(const GLfloat *v)
 167 {
 168    rasterpos(v[0], v[1], v[2], 1.0F);
 169 }
 170
 171 void GLAPIENTRY
 172 _mesa_RasterPos3iv(const GLint *v)
 173 {
 174    rasterpos((GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2], 1.0F);
 175 }
 176
 177 void GLAPIENTRY
 178 _mesa_RasterPos3sv(const GLshort *v)
 179 {
 180    rasterpos(v[0], v[1], v[2], 1.0F);
 181 }
 182
 183 void GLAPIENTRY
 184 _mesa_RasterPos4dv(const GLdouble *v)
 185 {
 186    rasterpos((GLfloat) v[0], (GLfloat) v[1],
 187                      (GLfloat) v[2], (GLfloat) v[3]);
 188 }
 189
 190 void GLAPIENTRY
 191 _mesa_RasterPos4fv(const GLfloat *v)
 192 {
 193    rasterpos(v[0], v[1], v[2], v[3]);
 194 }
 195
 196 void GLAPIENTRY
 197 _mesa_RasterPos4iv(const GLint *v)
 198 {
 199    rasterpos((GLfloat) v[0], (GLfloat) v[1],
 200                      (GLfloat) v[2], (GLfloat) v[3]);
 201 }
 202
 203 void GLAPIENTRY
 204 _mesa_RasterPos4sv(const GLshort *v)
 205 {
 206    rasterpos(v[0], v[1], v[2], v[3]);
 207 }
 208
 209
 210 /**********************************************************************/
 211 /***           GL_ARB_window_pos / GL_MESA_window_pos               ***/
 212 /**********************************************************************/
 213
 214 #if FEATURE_drawpix
 215 /**
 216  * All glWindowPosMESA and glWindowPosARB commands call this function to
 217  * update the current raster position.
 218  */
 219 static void
 220 window_pos3f(GLfloat x, GLfloat y, GLfloat z)
 221 {
 222    GET_CURRENT_CONTEXT(ctx);
 223    GLfloat z2;
 224
 225    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 226    FLUSH_CURRENT(ctx, 0);
 227
 228    z2 = CLAMP(z, 0.0F, 1.0F) * (ctx->Viewport.Far - ctx->Viewport.Near)
 229       + ctx->Viewport.Near;
 230
 231    /* set raster position */
 232    ctx->Current.RasterPos[0] = x;
 233    ctx->Current.RasterPos[1] = y;
 234    ctx->Current.RasterPos[2] = z2;
 235    ctx->Current.RasterPos[3] = 1.0F;
 236
 237    ctx->Current.RasterPosValid = GL_TRUE;
 238
 239    if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
 240       ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];
 241    else
 242       ctx->Current.RasterDistance = 0.0;
 243
 244    /* raster color = current color or index */
 245    if (ctx->Visual.rgbMode) {
 246       ctx->Current.RasterColor[0]
 247          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][0], 0.0F, 1.0F);
 248       ctx->Current.RasterColor[1]
 249          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][1], 0.0F, 1.0F);
 250       ctx->Current.RasterColor[2]
 251          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][2], 0.0F, 1.0F);
 252       ctx->Current.RasterColor[3]
 253          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][3], 0.0F, 1.0F);
 254       ctx->Current.RasterSecondaryColor[0]
 255          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][0], 0.0F, 1.0F);
 256       ctx->Current.RasterSecondaryColor[1]
 257          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][1], 0.0F, 1.0F);
 258       ctx->Current.RasterSecondaryColor[2]
 259          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][2], 0.0F, 1.0F);
 260       ctx->Current.RasterSecondaryColor[3]
 261          = CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][3], 0.0F, 1.0F);
 262    }
 263    else {
 264       ctx->Current.RasterIndex
 265          = ctx->Current.Attrib[VERT_ATTRIB_COLOR_INDEX][0];
 266    }
 267
 268    /* raster texcoord = current texcoord */
 269    {
 270       GLuint texSet;
 271       for (texSet = 0; texSet < ctx->Const.MaxTextureCoordUnits; texSet++) {
 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 void GLAPIENTRY
 294 _mesa_WindowPos2dMESA(GLdouble x, GLdouble y)
 295 {
 296    window_pos4f((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);
 297 }
 298
 299 void GLAPIENTRY
 300 _mesa_WindowPos2fMESA(GLfloat x, GLfloat y)
 301 {
 302    window_pos4f(x, y, 0.0F, 1.0F);
 303 }
 304
 305 void GLAPIENTRY
 306 _mesa_WindowPos2iMESA(GLint x, GLint y)
 307 {
 308    window_pos4f((GLfloat) x, (GLfloat) y, 0.0F, 1.0F);
 309 }
 310
 311 void GLAPIENTRY
 312 _mesa_WindowPos2sMESA(GLshort x, GLshort y)
 313 {
 314    window_pos4f(x, y, 0.0F, 1.0F);
 315 }
 316
 317 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 void GLAPIENTRY
 324 _mesa_WindowPos3fMESA(GLfloat x, GLfloat y, GLfloat z)
 325 {
 326    window_pos4f(x, y, z, 1.0F);
 327 }
 328
 329 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 void GLAPIENTRY
 336 _mesa_WindowPos3sMESA(GLshort x, GLshort y, GLshort z)
 337 {
 338    window_pos4f(x, y, z, 1.0F);
 339 }
 340
 341 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 void GLAPIENTRY
 348 _mesa_WindowPos4fMESA(GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 349 {
 350    window_pos4f(x, y, z, w);
 351 }
 352
 353 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 void GLAPIENTRY
 360 _mesa_WindowPos4sMESA(GLshort x, GLshort y, GLshort z, GLshort w)
 361 {
 362    window_pos4f(x, y, z, w);
 363 }
 364
 365 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 void GLAPIENTRY
 372 _mesa_WindowPos2fvMESA(const GLfloat *v)
 373 {
 374    window_pos4f(v[0], v[1], 0.0F, 1.0F);
 375 }
 376
 377 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 void GLAPIENTRY
 384 _mesa_WindowPos2svMESA(const GLshort *v)
 385 {
 386    window_pos4f(v[0], v[1], 0.0F, 1.0F);
 387 }
 388
 389 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 void GLAPIENTRY
 396 _mesa_WindowPos3fvMESA(const GLfloat *v)
 397 {
 398    window_pos4f(v[0], v[1], v[2], 1.0);
 399 }
 400
 401 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 void GLAPIENTRY
 408 _mesa_WindowPos3svMESA(const GLshort *v)
 409 {
 410    window_pos4f(v[0], v[1], v[2], 1.0F);
 411 }
 412
 413 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 void GLAPIENTRY
 421 _mesa_WindowPos4fvMESA(const GLfloat *v)
 422 {
 423    window_pos4f(v[0], v[1], v[2], v[3]);
 424 }
 425
 426 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 void GLAPIENTRY
 434 _mesa_WindowPos4svMESA(const GLshort *v)
 435 {
 436    window_pos4f(v[0], v[1], v[2], v[3]);
 437 }
 438
 439 #endif
 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 /**********************************************************************/
 481 /** \name Initialization                                              */
 482 /**********************************************************************/
 483 /*@{*/
 484
 485 /**
 486  * Initialize the context current raster position information.
 487  *
 488  * \param ctx GL context.
 489  *
 490  * Initialize the current raster position information in
 491  * __GLcontextRec::Current, and adds the extension entry points to the
 492  * dispatcher.
 493  */
 494 void _mesa_init_rastpos( GLcontext * ctx )
 495 {
 496    int i;
 497
 498    ASSIGN_4V( ctx->Current.RasterPos, 0.0, 0.0, 0.0, 1.0 );
 499    ctx->Current.RasterDistance = 0.0;
 500    ASSIGN_4V( ctx->Current.RasterColor, 1.0, 1.0, 1.0, 1.0 );
 501    ASSIGN_4V( ctx->Current.RasterSecondaryColor, 0.0, 0.0, 0.0, 1.0 );
 502    ctx->Current.RasterIndex = 1.0;
 503    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
 504       ASSIGN_4V( ctx->Current.RasterTexCoords[i], 0.0, 0.0, 0.0, 1.0 );
 505    ctx->Current.RasterPosValid = GL_TRUE;
 506 }
 507
 508 /*@}*/