src/mesa/main/pixel.c

   1 /* $Id: pixel.c,v 1.8 2000/04/17 15:13:53 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   6  *
   7  * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 #ifdef PC_HEADER
  29 #include "all.h"
  30 #else
  31 #include "glheader.h"
  32 #include "context.h"
  33 #include "macros.h"
  34 #include "mem.h"
  35 #include "pixel.h"
  36 #include "types.h"
  37 #endif
  38
  39
  40
  41 /**********************************************************************/
  42 /*****                    glPixelZoom                             *****/
  43 /**********************************************************************/
  44
  45
  46
  47 void
  48 _mesa_PixelZoom( GLfloat xfactor, GLfloat yfactor )
  49 {
  50    GET_CURRENT_CONTEXT(ctx);
  51    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelZoom");
  52
  53    ctx->Pixel.ZoomX = xfactor;
  54    ctx->Pixel.ZoomY = yfactor;
  55 }
  56
  57
  58
  59 /**********************************************************************/
  60 /*****                    glPixelStore                            *****/
  61 /**********************************************************************/
  62
  63
  64 void
  65 _mesa_PixelStorei( GLenum pname, GLint param )
  66 {
  67    /* NOTE: this call can't be compiled into the display list */
  68    GET_CURRENT_CONTEXT(ctx);
  69    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelStore");
  70
  71    switch (pname) {
  72       case GL_PACK_SWAP_BYTES:
  73          ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE;
  74          break;
  75       case GL_PACK_LSB_FIRST:
  76          ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE;
  77          break;
  78       case GL_PACK_ROW_LENGTH:
  79          if (param<0) {
  80             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
  81          }
  82          else {
  83             ctx->Pack.RowLength = param;
  84          }
  85          break;
  86       case GL_PACK_IMAGE_HEIGHT:
  87          if (param<0)
  88             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
  89          else
  90             ctx->Pack.ImageHeight = param;
  91          break;
  92       case GL_PACK_SKIP_PIXELS:
  93          if (param<0) {
  94             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
  95          }
  96          else {
  97             ctx->Pack.SkipPixels = param;
  98          }
  99          break;
 100       case GL_PACK_SKIP_ROWS:
 101          if (param<0) {
 102             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 103          }
 104          else {
 105             ctx->Pack.SkipRows = param;
 106          }
 107          break;
 108       case GL_PACK_ALIGNMENT:
 109          if (param==1 || param==2 || param==4 || param==8) {
 110             ctx->Pack.Alignment = param;
 111          }
 112          else {
 113             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 114          }
 115          break;
 116       case GL_UNPACK_SWAP_BYTES:
 117          ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE;
 118          break;
 119       case GL_UNPACK_LSB_FIRST:
 120          ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE;
 121          break;
 122       case GL_UNPACK_ROW_LENGTH:
 123          if (param<0) {
 124             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 125          }
 126          else {
 127             ctx->Unpack.RowLength = param;
 128          }
 129          break;
 130       case GL_UNPACK_IMAGE_HEIGHT:
 131          if (param<0)
 132             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 133          else
 134             ctx->Unpack.ImageHeight = param;
 135          break;
 136       case GL_UNPACK_SKIP_PIXELS:
 137          if (param<0) {
 138             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 139          }
 140          else {
 141             ctx->Unpack.SkipPixels = param;
 142          }
 143          break;
 144       case GL_UNPACK_SKIP_ROWS:
 145          if (param<0) {
 146             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
 147          }
 148          else {
 149             ctx->Unpack.SkipRows = param;
 150          }
 151          break;
 152       case GL_UNPACK_ALIGNMENT:
 153          if (param==1 || param==2 || param==4 || param==8) {
 154             ctx->Unpack.Alignment = param;
 155          }
 156          else {
 157             gl_error( ctx, GL_INVALID_VALUE, "glPixelStore" );
 158          }
 159          break;
 160       default:
 161          gl_error( ctx, GL_INVALID_ENUM, "glPixelStore" );
 162    }
 163 }
 164
 165
 166 void
 167 _mesa_PixelStoref( GLenum pname, GLfloat param )
 168 {
 169    _mesa_PixelStorei( pname, (GLint) param );
 170 }
 171
 172
 173
 174 /**********************************************************************/
 175 /*****                         glPixelMap                         *****/
 176 /**********************************************************************/
 177
 178
 179
 180 void
 181 _mesa_PixelMapfv( GLenum map, GLint mapsize, const GLfloat *values )
 182 {
 183    GLint i;
 184    GET_CURRENT_CONTEXT(ctx);
 185    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelMapfv");
 186
 187
 188    if (mapsize<0 || mapsize>MAX_PIXEL_MAP_TABLE) {
 189       gl_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
 190       return;
 191    }
 192
 193    if (map>=GL_PIXEL_MAP_S_TO_S && map<=GL_PIXEL_MAP_I_TO_A) {
 194       /* test that mapsize is a power of two */
 195       GLuint p;
 196       GLboolean ok = GL_FALSE;
 197       for (p=1; p<=MAX_PIXEL_MAP_TABLE; p=p<<1) {
 198          if ( (p&mapsize) == p ) {
 199             ok = GL_TRUE;
 200             break;
 201          }
 202       }
 203       if (!ok) {
 204          gl_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
 205          return;
 206       }
 207    }
 208
 209    switch (map) {
 210       case GL_PIXEL_MAP_S_TO_S:
 211          ctx->Pixel.MapStoSsize = mapsize;
 212          for (i=0;i<mapsize;i++) {
 213             ctx->Pixel.MapStoS[i] = (GLint) values[i];
 214          }
 215          break;
 216       case GL_PIXEL_MAP_I_TO_I:
 217          ctx->Pixel.MapItoIsize = mapsize;
 218          for (i=0;i<mapsize;i++) {
 219             ctx->Pixel.MapItoI[i] = (GLint) values[i];
 220          }
 221          break;
 222       case GL_PIXEL_MAP_I_TO_R:
 223          ctx->Pixel.MapItoRsize = mapsize;
 224          for (i=0;i<mapsize;i++) {
 225             GLfloat val = CLAMP( values[i], 0.0, 1.0 );
 226             ctx->Pixel.MapItoR[i] = val;
 227             ctx->Pixel.MapItoR8[i] = (GLint) (val * 255.0F);
 228          }
 229          break;
 230       case GL_PIXEL_MAP_I_TO_G:
 231          ctx->Pixel.MapItoGsize = mapsize;
 232          for (i=0;i<mapsize;i++) {
 233             GLfloat val = CLAMP( values[i], 0.0, 1.0 );
 234             ctx->Pixel.MapItoG[i] = val;
 235             ctx->Pixel.MapItoG8[i] = (GLint) (val * 255.0F);
 236          }
 237          break;
 238       case GL_PIXEL_MAP_I_TO_B:
 239          ctx->Pixel.MapItoBsize = mapsize;
 240          for (i=0;i<mapsize;i++) {
 241             GLfloat val = CLAMP( values[i], 0.0, 1.0 );
 242             ctx->Pixel.MapItoB[i] = val;
 243             ctx->Pixel.MapItoB8[i] = (GLint) (val * 255.0F);
 244          }
 245          break;
 246       case GL_PIXEL_MAP_I_TO_A:
 247          ctx->Pixel.MapItoAsize = mapsize;
 248          for (i=0;i<mapsize;i++) {
 249             GLfloat val = CLAMP( values[i], 0.0, 1.0 );
 250             ctx->Pixel.MapItoA[i] = val;
 251             ctx->Pixel.MapItoA8[i] = (GLint) (val * 255.0F);
 252          }
 253          break;
 254       case GL_PIXEL_MAP_R_TO_R:
 255          ctx->Pixel.MapRtoRsize = mapsize;
 256          for (i=0;i<mapsize;i++) {
 257             ctx->Pixel.MapRtoR[i] = CLAMP( values[i], 0.0, 1.0 );
 258          }
 259          break;
 260       case GL_PIXEL_MAP_G_TO_G:
 261          ctx->Pixel.MapGtoGsize = mapsize;
 262          for (i=0;i<mapsize;i++) {
 263             ctx->Pixel.MapGtoG[i] = CLAMP( values[i], 0.0, 1.0 );
 264          }
 265          break;
 266       case GL_PIXEL_MAP_B_TO_B:
 267          ctx->Pixel.MapBtoBsize = mapsize;
 268          for (i=0;i<mapsize;i++) {
 269             ctx->Pixel.MapBtoB[i] = CLAMP( values[i], 0.0, 1.0 );
 270          }
 271          break;
 272       case GL_PIXEL_MAP_A_TO_A:
 273          ctx->Pixel.MapAtoAsize = mapsize;
 274          for (i=0;i<mapsize;i++) {
 275             ctx->Pixel.MapAtoA[i] = CLAMP( values[i], 0.0, 1.0 );
 276          }
 277          break;
 278       default:
 279          gl_error( ctx, GL_INVALID_ENUM, "glPixelMapfv(map)" );
 280    }
 281 }
 282
 283
 284
 285 void
 286 _mesa_PixelMapuiv(GLenum map, GLint mapsize, const GLuint *values )
 287 {
 288    GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
 289    GLint i;
 290    if (map==GL_PIXEL_MAP_I_TO_I || map==GL_PIXEL_MAP_S_TO_S) {
 291       for (i=0;i<mapsize;i++) {
 292          fvalues[i] = (GLfloat) values[i];
 293       }
 294    }
 295    else {
 296       for (i=0;i<mapsize;i++) {
 297          fvalues[i] = UINT_TO_FLOAT( values[i] );
 298       }
 299    }
 300    _mesa_PixelMapfv(map, mapsize, fvalues);
 301 }
 302
 303
 304
 305 void
 306 _mesa_PixelMapusv(GLenum map, GLint mapsize, const GLushort *values )
 307 {
 308    GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
 309    GLint i;
 310    if (map==GL_PIXEL_MAP_I_TO_I || map==GL_PIXEL_MAP_S_TO_S) {
 311       for (i=0;i<mapsize;i++) {
 312          fvalues[i] = (GLfloat) values[i];
 313       }
 314    }
 315    else {
 316       for (i=0;i<mapsize;i++) {
 317          fvalues[i] = USHORT_TO_FLOAT( values[i] );
 318       }
 319    }
 320    _mesa_PixelMapfv(map, mapsize, fvalues);
 321 }
 322
 323
 324
 325 void
 326 _mesa_GetPixelMapfv( GLenum map, GLfloat *values )
 327 {
 328    GET_CURRENT_CONTEXT(ctx);
 329    GLint i;
 330
 331    ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
 332
 333    switch (map) {
 334       case GL_PIXEL_MAP_I_TO_I:
 335          for (i=0;i<ctx->Pixel.MapItoIsize;i++) {
 336             values[i] = (GLfloat) ctx->Pixel.MapItoI[i];
 337          }
 338          break;
 339       case GL_PIXEL_MAP_S_TO_S:
 340          for (i=0;i<ctx->Pixel.MapStoSsize;i++) {
 341             values[i] = (GLfloat) ctx->Pixel.MapStoS[i];
 342          }
 343          break;
 344       case GL_PIXEL_MAP_I_TO_R:
 345          MEMCPY(values,ctx->Pixel.MapItoR,ctx->Pixel.MapItoRsize*sizeof(GLfloat));
 346          break;
 347       case GL_PIXEL_MAP_I_TO_G:
 348          MEMCPY(values,ctx->Pixel.MapItoG,ctx->Pixel.MapItoGsize*sizeof(GLfloat));
 349          break;
 350       case GL_PIXEL_MAP_I_TO_B:
 351          MEMCPY(values,ctx->Pixel.MapItoB,ctx->Pixel.MapItoBsize*sizeof(GLfloat));
 352          break;
 353       case GL_PIXEL_MAP_I_TO_A:
 354          MEMCPY(values,ctx->Pixel.MapItoA,ctx->Pixel.MapItoAsize*sizeof(GLfloat));
 355          break;
 356       case GL_PIXEL_MAP_R_TO_R:
 357          MEMCPY(values,ctx->Pixel.MapRtoR,ctx->Pixel.MapRtoRsize*sizeof(GLfloat));
 358          break;
 359       case GL_PIXEL_MAP_G_TO_G:
 360          MEMCPY(values,ctx->Pixel.MapGtoG,ctx->Pixel.MapGtoGsize*sizeof(GLfloat));
 361          break;
 362       case GL_PIXEL_MAP_B_TO_B:
 363          MEMCPY(values,ctx->Pixel.MapBtoB,ctx->Pixel.MapBtoBsize*sizeof(GLfloat));
 364          break;
 365       case GL_PIXEL_MAP_A_TO_A:
 366          MEMCPY(values,ctx->Pixel.MapAtoA,ctx->Pixel.MapAtoAsize*sizeof(GLfloat));
 367          break;
 368       default:
 369          gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
 370    }
 371 }
 372
 373
 374 void
 375 _mesa_GetPixelMapuiv( GLenum map, GLuint *values )
 376 {
 377    GET_CURRENT_CONTEXT(ctx);
 378    GLint i;
 379
 380    ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
 381
 382    switch (map) {
 383       case GL_PIXEL_MAP_I_TO_I:
 384          MEMCPY(values, ctx->Pixel.MapItoI, ctx->Pixel.MapItoIsize*sizeof(GLint));
 385          break;
 386       case GL_PIXEL_MAP_S_TO_S:
 387          MEMCPY(values, ctx->Pixel.MapStoS, ctx->Pixel.MapStoSsize*sizeof(GLint));
 388          break;
 389       case GL_PIXEL_MAP_I_TO_R:
 390          for (i=0;i<ctx->Pixel.MapItoRsize;i++) {
 391             values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoR[i] );
 392          }
 393          break;
 394       case GL_PIXEL_MAP_I_TO_G:
 395          for (i=0;i<ctx->Pixel.MapItoGsize;i++) {
 396             values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoG[i] );
 397          }
 398          break;
 399       case GL_PIXEL_MAP_I_TO_B:
 400          for (i=0;i<ctx->Pixel.MapItoBsize;i++) {
 401             values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoB[i] );
 402          }
 403          break;
 404       case GL_PIXEL_MAP_I_TO_A:
 405          for (i=0;i<ctx->Pixel.MapItoAsize;i++) {
 406             values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoA[i] );
 407          }
 408          break;
 409       case GL_PIXEL_MAP_R_TO_R:
 410          for (i=0;i<ctx->Pixel.MapRtoRsize;i++) {
 411             values[i] = FLOAT_TO_UINT( ctx->Pixel.MapRtoR[i] );
 412          }
 413          break;
 414       case GL_PIXEL_MAP_G_TO_G:
 415          for (i=0;i<ctx->Pixel.MapGtoGsize;i++) {
 416             values[i] = FLOAT_TO_UINT( ctx->Pixel.MapGtoG[i] );
 417          }
 418          break;
 419       case GL_PIXEL_MAP_B_TO_B:
 420          for (i=0;i<ctx->Pixel.MapBtoBsize;i++) {
 421             values[i] = FLOAT_TO_UINT( ctx->Pixel.MapBtoB[i] );
 422          }
 423          break;
 424       case GL_PIXEL_MAP_A_TO_A:
 425          for (i=0;i<ctx->Pixel.MapAtoAsize;i++) {
 426             values[i] = FLOAT_TO_UINT( ctx->Pixel.MapAtoA[i] );
 427          }
 428          break;
 429       default:
 430          gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
 431    }
 432 }
 433
 434
 435 void
 436 _mesa_GetPixelMapusv( GLenum map, GLushort *values )
 437 {
 438    GET_CURRENT_CONTEXT(ctx);
 439    GLint i;
 440
 441    ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
 442
 443    switch (map) {
 444       case GL_PIXEL_MAP_I_TO_I:
 445          for (i=0;i<ctx->Pixel.MapItoIsize;i++) {
 446             values[i] = (GLushort) ctx->Pixel.MapItoI[i];
 447          }
 448          break;
 449       case GL_PIXEL_MAP_S_TO_S:
 450          for (i=0;i<ctx->Pixel.MapStoSsize;i++) {
 451             values[i] = (GLushort) ctx->Pixel.MapStoS[i];
 452          }
 453          break;
 454       case GL_PIXEL_MAP_I_TO_R:
 455          for (i=0;i<ctx->Pixel.MapItoRsize;i++) {
 456             values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoR[i] );
 457          }
 458          break;
 459       case GL_PIXEL_MAP_I_TO_G:
 460          for (i=0;i<ctx->Pixel.MapItoGsize;i++) {
 461             values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoG[i] );
 462          }
 463          break;
 464       case GL_PIXEL_MAP_I_TO_B:
 465          for (i=0;i<ctx->Pixel.MapItoBsize;i++) {
 466             values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoB[i] );
 467          }
 468          break;
 469       case GL_PIXEL_MAP_I_TO_A:
 470          for (i=0;i<ctx->Pixel.MapItoAsize;i++) {
 471             values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoA[i] );
 472          }
 473          break;
 474       case GL_PIXEL_MAP_R_TO_R:
 475          for (i=0;i<ctx->Pixel.MapRtoRsize;i++) {
 476             values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapRtoR[i] );
 477          }
 478          break;
 479       case GL_PIXEL_MAP_G_TO_G:
 480          for (i=0;i<ctx->Pixel.MapGtoGsize;i++) {
 481             values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapGtoG[i] );
 482          }
 483          break;
 484       case GL_PIXEL_MAP_B_TO_B:
 485          for (i=0;i<ctx->Pixel.MapBtoBsize;i++) {
 486             values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapBtoB[i] );
 487          }
 488          break;
 489       case GL_PIXEL_MAP_A_TO_A:
 490          for (i=0;i<ctx->Pixel.MapAtoAsize;i++) {
 491             values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapAtoA[i] );
 492          }
 493          break;
 494       default:
 495          gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
 496    }
 497 }
 498
 499
 500
 501 /**********************************************************************/
 502 /*****                       glPixelTransfer                      *****/
 503 /**********************************************************************/
 504
 505
 506 /*
 507  * Implements glPixelTransfer[fi] whether called immediately or from a
 508  * display list.
 509  */
 510 void
 511 _mesa_PixelTransferf( GLenum pname, GLfloat param )
 512 {
 513    GET_CURRENT_CONTEXT(ctx);
 514    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelTransfer");
 515
 516
 517    switch (pname) {
 518       case GL_MAP_COLOR:
 519          ctx->Pixel.MapColorFlag = param ? GL_TRUE : GL_FALSE;
 520          break;
 521       case GL_MAP_STENCIL:
 522          ctx->Pixel.MapStencilFlag = param ? GL_TRUE : GL_FALSE;
 523          break;
 524       case GL_INDEX_SHIFT:
 525          ctx->Pixel.IndexShift = (GLint) param;
 526          break;
 527       case GL_INDEX_OFFSET:
 528          ctx->Pixel.IndexOffset = (GLint) param;
 529          break;
 530       case GL_RED_SCALE:
 531          ctx->Pixel.RedScale = param;
 532          break;
 533       case GL_RED_BIAS:
 534          ctx->Pixel.RedBias = param;
 535          break;
 536       case GL_GREEN_SCALE:
 537          ctx->Pixel.GreenScale = param;
 538          break;
 539       case GL_GREEN_BIAS:
 540          ctx->Pixel.GreenBias = param;
 541          break;
 542       case GL_BLUE_SCALE:
 543          ctx->Pixel.BlueScale = param;
 544          break;
 545       case GL_BLUE_BIAS:
 546          ctx->Pixel.BlueBias = param;
 547          break;
 548       case GL_ALPHA_SCALE:
 549          ctx->Pixel.AlphaScale = param;
 550          break;
 551       case GL_ALPHA_BIAS:
 552          ctx->Pixel.AlphaBias = param;
 553          break;
 554       case GL_DEPTH_SCALE:
 555          ctx->Pixel.DepthScale = param;
 556          break;
 557       case GL_DEPTH_BIAS:
 558          ctx->Pixel.DepthBias = param;
 559          break;
 560       case GL_POST_COLOR_MATRIX_RED_SCALE:
 561          ctx->Pixel.PostColorMatrixRedScale = param;
 562          break;
 563       case GL_POST_COLOR_MATRIX_RED_BIAS:
 564          ctx->Pixel.PostColorMatrixRedBias = param;
 565          break;
 566       case GL_POST_COLOR_MATRIX_GREEN_SCALE:
 567          ctx->Pixel.PostColorMatrixGreenScale = param;
 568          break;
 569       case GL_POST_COLOR_MATRIX_GREEN_BIAS:
 570          ctx->Pixel.PostColorMatrixGreenBias = param;
 571          break;
 572       case GL_POST_COLOR_MATRIX_BLUE_SCALE:
 573          ctx->Pixel.PostColorMatrixBlueScale = param;
 574          break;
 575       case GL_POST_COLOR_MATRIX_BLUE_BIAS:
 576          ctx->Pixel.PostColorMatrixBlueBias = param;
 577          break;
 578       case GL_POST_COLOR_MATRIX_ALPHA_SCALE:
 579          ctx->Pixel.PostColorMatrixAlphaScale = param;
 580          break;
 581       case GL_POST_COLOR_MATRIX_ALPHA_BIAS:
 582          ctx->Pixel.PostColorMatrixAlphaBias = param;
 583          break;
 584       default:
 585          gl_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" );
 586          return;
 587    }
 588
 589    if (ctx->Pixel.RedScale!=1.0F   || ctx->Pixel.RedBias!=0.0F ||
 590        ctx->Pixel.GreenScale!=1.0F || ctx->Pixel.GreenBias!=0.0F ||
 591        ctx->Pixel.BlueScale!=1.0F  || ctx->Pixel.BlueBias!=0.0F ||
 592        ctx->Pixel.AlphaScale!=1.0F || ctx->Pixel.AlphaBias!=0.0F) {
 593       ctx->Pixel.ScaleOrBiasRGBA = GL_TRUE;
 594    }
 595    else {
 596       ctx->Pixel.ScaleOrBiasRGBA = GL_FALSE;
 597    }
 598
 599    if (ctx->Pixel.PostColorMatrixRedScale!=1.0F   ||
 600        ctx->Pixel.PostColorMatrixRedBias!=0.0F    ||
 601        ctx->Pixel.PostColorMatrixGreenScale!=1.0F ||
 602        ctx->Pixel.PostColorMatrixGreenBias!=0.0F  ||
 603        ctx->Pixel.PostColorMatrixBlueScale!=1.0F  ||
 604        ctx->Pixel.PostColorMatrixBlueBias!=0.0F   ||
 605        ctx->Pixel.PostColorMatrixAlphaScale!=1.0F ||
 606        ctx->Pixel.PostColorMatrixAlphaBias!=0.0F) {
 607       ctx->Pixel.ScaleOrBiasRGBApcm = GL_TRUE;
 608    }
 609    else {
 610       ctx->Pixel.ScaleOrBiasRGBApcm = GL_FALSE;
 611    }
 612 }
 613
 614
 615 void
 616 _mesa_PixelTransferi( GLenum pname, GLint param )
 617 {
 618    _mesa_PixelTransferf( pname, (GLfloat) param );
 619 }
 620
 621
 622
 623 /**********************************************************************/
 624 /*****                  Pixel processing functions               ******/
 625 /**********************************************************************/
 626
 627
 628 /*
 629  * Apply scale and bias factors to an array of RGBA pixels.
 630  */
 631 void
 632 _mesa_scale_and_bias_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
 633 {
 634    if (ctx->Pixel.RedScale != 1.0 || ctx->Pixel.RedBias != 0.0) {
 635       const GLfloat scale = ctx->Pixel.RedScale;
 636       const GLfloat bias = ctx->Pixel.RedBias;
 637       GLuint i;
 638       for (i = 0; i < n; i++) {
 639          rgba[i][RCOMP] = rgba[i][RCOMP] * scale + bias;
 640       }
 641    }
 642    if (ctx->Pixel.GreenScale != 1.0 || ctx->Pixel.GreenBias != 0.0) {
 643       const GLfloat scale = ctx->Pixel.GreenScale;
 644       const GLfloat bias = ctx->Pixel.GreenBias;
 645       GLuint i;
 646       for (i = 0; i < n; i++) {
 647          rgba[i][GCOMP] = rgba[i][GCOMP] * scale + bias;
 648       }
 649    }
 650    if (ctx->Pixel.BlueScale != 1.0 || ctx->Pixel.BlueBias != 0.0) {
 651       const GLfloat scale = ctx->Pixel.BlueScale;
 652       const GLfloat bias = ctx->Pixel.BlueBias;
 653       GLuint i;
 654       for (i = 0; i < n; i++) {
 655          rgba[i][BCOMP] = rgba[i][BCOMP] * scale + bias;
 656       }
 657    }
 658    if (ctx->Pixel.AlphaScale != 1.0 || ctx->Pixel.AlphaBias != 0.0) {
 659       const GLfloat scale = ctx->Pixel.AlphaScale;
 660       const GLfloat bias = ctx->Pixel.AlphaBias;
 661       GLuint i;
 662       for (i = 0; i < n; i++) {
 663          rgba[i][ACOMP] = rgba[i][ACOMP] * scale + bias;
 664       }
 665    }
 666 }
 667
 668
 669 /*
 670  * Apply pixel mapping to an array of floating point RGBA pixels.
 671  */
 672 void
 673 _mesa_map_rgba( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
 674 {
 675    const GLfloat rscale = ctx->Pixel.MapRtoRsize - 1;
 676    const GLfloat gscale = ctx->Pixel.MapGtoGsize - 1;
 677    const GLfloat bscale = ctx->Pixel.MapBtoBsize - 1;
 678    const GLfloat ascale = ctx->Pixel.MapAtoAsize - 1;
 679    const GLfloat *rMap = ctx->Pixel.MapRtoR;
 680    const GLfloat *gMap = ctx->Pixel.MapGtoG;
 681    const GLfloat *bMap = ctx->Pixel.MapBtoB;
 682    const GLfloat *aMap = ctx->Pixel.MapAtoA;
 683    GLuint i;
 684    for (i=0;i<n;i++) {
 685       rgba[i][RCOMP] = rMap[(GLint) (rgba[i][RCOMP] * rscale + 0.5F)];
 686       rgba[i][GCOMP] = gMap[(GLint) (rgba[i][GCOMP] * gscale + 0.5F)];
 687       rgba[i][BCOMP] = bMap[(GLint) (rgba[i][BCOMP] * bscale + 0.5F)];
 688       rgba[i][ACOMP] = aMap[(GLint) (rgba[i][ACOMP] * ascale + 0.5F)];
 689    }
 690 }
 691
 692
 693 /*
 694  * Apply the color matrix and post color matrix scaling and biasing.
 695  */
 696 void
 697 _mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
 698 {
 699    const GLfloat rs = ctx->Pixel.PostColorMatrixRedScale;
 700    const GLfloat rb = ctx->Pixel.PostColorMatrixRedBias;
 701    const GLfloat gs = ctx->Pixel.PostColorMatrixGreenScale;
 702    const GLfloat gb = ctx->Pixel.PostColorMatrixGreenBias;
 703    const GLfloat bs = ctx->Pixel.PostColorMatrixBlueScale;
 704    const GLfloat bb = ctx->Pixel.PostColorMatrixBlueBias;
 705    const GLfloat as = ctx->Pixel.PostColorMatrixAlphaScale;
 706    const GLfloat ab = ctx->Pixel.PostColorMatrixAlphaBias;
 707    const GLfloat *m = ctx->ColorMatrix.m;
 708    GLuint i;
 709    for (i = 0; i < n; i++) {
 710       const GLfloat r = rgba[i][RCOMP];
 711       const GLfloat g = rgba[i][GCOMP];
 712       const GLfloat b = rgba[i][BCOMP];
 713       const GLfloat a = rgba[i][ACOMP];
 714       rgba[i][RCOMP] = (m[0] * r + m[4] * g + m[ 8] * b + m[12] * a) * rs + rb;
 715       rgba[i][GCOMP] = (m[1] * r + m[5] * g + m[ 9] * b + m[13] * a) * gs + gb;
 716       rgba[i][BCOMP] = (m[2] * r + m[6] * g + m[10] * b + m[14] * a) * bs + bb;
 717       rgba[i][ACOMP] = (m[3] * r + m[7] * g + m[11] * b + m[15] * a) * as + ab;
 718    }
 719 }
 720
 721
 722 /*
 723  * Apply a color table lookup to an array of colors.
 724  */
 725 void
 726 _mesa_lookup_rgba(const struct gl_color_table *table,
 727                   GLuint n, GLfloat rgba[][4])
 728 {
 729    switch (table->Format) {
 730       case GL_INTENSITY:
 731          {
 732             const GLfloat scale = (GLfloat) (table->Size - 1);
 733             const GLfloat *lut = table->TableF;
 734             GLuint i;
 735             /* replace RGBA with I */
 736             for (i = 0; i < n; i++) {
 737                GLint j = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
 738                GLubyte c = lut[j];
 739                rgba[i][RCOMP] = rgba[i][GCOMP] =
 740                   rgba[i][BCOMP] = rgba[i][ACOMP] = c;
 741             }
 742          }
 743          break;
 744       case GL_LUMINANCE:
 745          {
 746             const GLfloat scale = (GLfloat) (table->Size - 1);
 747             const GLfloat *lut = table->TableF;
 748             GLuint i;
 749             /* replace RGB with L */
 750             for (i = 0; i < n; i++) {
 751                GLint j = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
 752                GLubyte c = lut[j];
 753                rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c;
 754             }
 755          }
 756          break;
 757       case GL_ALPHA:
 758          {
 759             const GLfloat scale = (GLfloat) (table->Size - 1);
 760             const GLfloat *lut = table->TableF;
 761             GLuint i;
 762             /* replace A with A */
 763             for (i = 0; i < n; i++) {
 764                GLint j = (GLint) (rgba[i][ACOMP] * scale + 0.5F);
 765                rgba[i][ACOMP] = lut[j];
 766             }
 767          }
 768          break;
 769       case GL_LUMINANCE_ALPHA:
 770          {
 771             const GLfloat scale = (GLfloat) (table->Size - 1);
 772             const GLfloat *lut = table->TableF;
 773             GLuint i;
 774             /* replace RGBA with LLLA */
 775             for (i = 0; i < n; i++) {
 776                GLint jL = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
 777                GLint jA = (GLint) (rgba[i][ACOMP] * scale + 0.5F);
 778                GLubyte luminance = lut[jL * 2 + 0];
 779                GLubyte alpha     = lut[jA * 2 + 1];
 780                rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance;
 781                rgba[i][ACOMP] = alpha;;
 782             }
 783          }
 784          break;
 785       case GL_RGB:
 786          {
 787             const GLfloat scale = (GLfloat) (table->Size - 1);
 788             const GLfloat *lut = table->TableF;
 789             GLuint i;
 790             /* replace RGB with RGB */
 791             for (i = 0; i < n; i++) {
 792                GLint jR = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
 793                GLint jG = (GLint) (rgba[i][GCOMP] * scale + 0.5F);
 794                GLint jB = (GLint) (rgba[i][BCOMP] * scale + 0.5F);
 795                rgba[i][RCOMP] = lut[jR * 3 + 0];
 796                rgba[i][GCOMP] = lut[jG * 3 + 1];
 797                rgba[i][BCOMP] = lut[jB * 3 + 2];
 798             }
 799          }
 800          break;
 801       case GL_RGBA:
 802          {
 803             const GLfloat scale = (GLfloat) (table->Size - 1);
 804             const GLfloat *lut = table->TableF;
 805             GLuint i;
 806             /* replace RGBA with RGBA */
 807             for (i = 0; i < n; i++) {
 808                GLint jR = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
 809                GLint jG = (GLint) (rgba[i][GCOMP] * scale + 0.5F);
 810                GLint jB = (GLint) (rgba[i][BCOMP] * scale + 0.5F);
 811                GLint jA = (GLint) (rgba[i][ACOMP] * scale + 0.5F);
 812                rgba[i][RCOMP] = lut[jR * 4 + 0];
 813                rgba[i][GCOMP] = lut[jG * 4 + 1];
 814                rgba[i][BCOMP] = lut[jB * 4 + 2];
 815                rgba[i][ACOMP] = lut[jA * 4 + 3];
 816             }
 817          }
 818          break;
 819       default:
 820          gl_problem(NULL, "Bad format in _mesa_lookup_rgba");
 821          return;
 822    }
 823 }
 824
 825
 826
 827 /*
 828  * Apply color index shift and offset to an array of pixels.
 829  */
 830 void
 831 _mesa_shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
 832 {
 833    GLint shift = ctx->Pixel.IndexShift;
 834    GLint offset = ctx->Pixel.IndexOffset;
 835    GLuint i;
 836    if (shift > 0) {
 837       for (i=0;i<n;i++) {
 838          indexes[i] = (indexes[i] << shift) + offset;
 839       }
 840    }
 841    else if (shift < 0) {
 842       shift = -shift;
 843       for (i=0;i<n;i++) {
 844          indexes[i] = (indexes[i] >> shift) + offset;
 845       }
 846    }
 847    else {
 848       for (i=0;i<n;i++) {
 849          indexes[i] = indexes[i] + offset;
 850       }
 851    }
 852 }
 853
 854
 855 /*
 856  * Apply color index mapping to color indexes.
 857  */
 858 void
 859 _mesa_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] )
 860 {
 861    GLuint mask = ctx->Pixel.MapItoIsize - 1;
 862    GLuint i;
 863    for (i=0;i<n;i++) {
 864       index[i] = ctx->Pixel.MapItoI[ index[i] & mask ];
 865    }
 866 }
 867
 868
 869 /*
 870  * Map color indexes to rgba values.
 871  */
 872 void
 873 _mesa_map_ci_to_rgba_ubyte( const GLcontext *ctx, GLuint n,
 874                             const GLuint index[], GLubyte rgba[][4] )
 875 {
 876    GLuint rmask = ctx->Pixel.MapItoRsize - 1;
 877    GLuint gmask = ctx->Pixel.MapItoGsize - 1;
 878    GLuint bmask = ctx->Pixel.MapItoBsize - 1;
 879    GLuint amask = ctx->Pixel.MapItoAsize - 1;
 880    const GLubyte *rMap = ctx->Pixel.MapItoR8;
 881    const GLubyte *gMap = ctx->Pixel.MapItoG8;
 882    const GLubyte *bMap = ctx->Pixel.MapItoB8;
 883    const GLubyte *aMap = ctx->Pixel.MapItoA8;
 884    GLuint i;
 885    for (i=0;i<n;i++) {
 886       rgba[i][RCOMP] = rMap[index[i] & rmask];
 887       rgba[i][GCOMP] = gMap[index[i] & gmask];
 888       rgba[i][BCOMP] = bMap[index[i] & bmask];
 889       rgba[i][ACOMP] = aMap[index[i] & amask];
 890    }
 891 }
 892
 893
 894 /*
 895  * Map color indexes to float rgba values.
 896  */
 897 void
 898 _mesa_map_ci_to_rgba( const GLcontext *ctx, GLuint n,
 899                       const GLuint index[], GLfloat rgba[][4] )
 900 {
 901    GLuint rmask = ctx->Pixel.MapItoRsize - 1;
 902    GLuint gmask = ctx->Pixel.MapItoGsize - 1;
 903    GLuint bmask = ctx->Pixel.MapItoBsize - 1;
 904    GLuint amask = ctx->Pixel.MapItoAsize - 1;
 905    const GLfloat *rMap = ctx->Pixel.MapItoR;
 906    const GLfloat *gMap = ctx->Pixel.MapItoG;
 907    const GLfloat *bMap = ctx->Pixel.MapItoB;
 908    const GLfloat *aMap = ctx->Pixel.MapItoA;
 909    GLuint i;
 910    for (i=0;i<n;i++) {
 911       rgba[i][RCOMP] = rMap[index[i] & rmask];
 912       rgba[i][GCOMP] = gMap[index[i] & gmask];
 913       rgba[i][BCOMP] = bMap[index[i] & bmask];
 914       rgba[i][ACOMP] = aMap[index[i] & amask];
 915    }
 916 }
 917
 918
 919 /*
 920  * Map 8-bit color indexes to rgb values.
 921  */
 922 void
 923 _mesa_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[],
 924                        GLubyte rgba[][4] )
 925 {
 926    GLuint rmask = ctx->Pixel.MapItoRsize - 1;
 927    GLuint gmask = ctx->Pixel.MapItoGsize - 1;
 928    GLuint bmask = ctx->Pixel.MapItoBsize - 1;
 929    GLuint amask = ctx->Pixel.MapItoAsize - 1;
 930    const GLubyte *rMap = ctx->Pixel.MapItoR8;
 931    const GLubyte *gMap = ctx->Pixel.MapItoG8;
 932    const GLubyte *bMap = ctx->Pixel.MapItoB8;
 933    const GLubyte *aMap = ctx->Pixel.MapItoA8;
 934    GLuint i;
 935    for (i=0;i<n;i++) {
 936       rgba[i][RCOMP] = rMap[index[i] & rmask];
 937       rgba[i][GCOMP] = gMap[index[i] & gmask];
 938       rgba[i][BCOMP] = bMap[index[i] & bmask];
 939       rgba[i][ACOMP] = aMap[index[i] & amask];
 940    }
 941 }
 942
 943
 944 void
 945 _mesa_shift_and_offset_stencil( const GLcontext *ctx, GLuint n,
 946                                 GLstencil stencil[] )
 947 {
 948    GLuint i;
 949    GLint shift = ctx->Pixel.IndexShift;
 950    GLint offset = ctx->Pixel.IndexOffset;
 951    if (shift > 0) {
 952       for (i=0;i<n;i++) {
 953          stencil[i] = (stencil[i] << shift) + offset;
 954       }
 955    }
 956    else if (shift < 0) {
 957       shift = -shift;
 958       for (i=0;i<n;i++) {
 959          stencil[i] = (stencil[i] >> shift) + offset;
 960       }
 961    }
 962    else {
 963       for (i=0;i<n;i++) {
 964          stencil[i] = stencil[i] + offset;
 965       }
 966    }
 967
 968 }
 969
 970
 971 void
 972 _mesa_map_stencil( const GLcontext *ctx, GLuint n, GLstencil stencil[] )
 973 {
 974    GLuint mask = ctx->Pixel.MapStoSsize - 1;
 975    GLuint i;
 976    for (i=0;i<n;i++) {
 977       stencil[i] = ctx->Pixel.MapStoS[ stencil[i] & mask ];
 978    }
 979 }