src/mesa/main/colortab.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 #include "glheader.h"
  27 #include "bufferobj.h"
  28 #include "colortab.h"
  29 #include "context.h"
  30 #include "image.h"
  31 #include "macros.h"
  32 #include "state.h"
  33
  34
  35 /**
  36  * Given an internalFormat token passed to glColorTable,
  37  * return the corresponding base format.
  38  * Return -1 if invalid token.
  39  */
  40 static GLint
  41 base_colortab_format( GLenum format )
  42 {
  43    switch (format) {
  44       case GL_ALPHA:
  45       case GL_ALPHA4:
  46       case GL_ALPHA8:
  47       case GL_ALPHA12:
  48       case GL_ALPHA16:
  49          return GL_ALPHA;
  50       case GL_LUMINANCE:
  51       case GL_LUMINANCE4:
  52       case GL_LUMINANCE8:
  53       case GL_LUMINANCE12:
  54       case GL_LUMINANCE16:
  55          return GL_LUMINANCE;
  56       case GL_LUMINANCE_ALPHA:
  57       case GL_LUMINANCE4_ALPHA4:
  58       case GL_LUMINANCE6_ALPHA2:
  59       case GL_LUMINANCE8_ALPHA8:
  60       case GL_LUMINANCE12_ALPHA4:
  61       case GL_LUMINANCE12_ALPHA12:
  62       case GL_LUMINANCE16_ALPHA16:
  63          return GL_LUMINANCE_ALPHA;
  64       case GL_INTENSITY:
  65       case GL_INTENSITY4:
  66       case GL_INTENSITY8:
  67       case GL_INTENSITY12:
  68       case GL_INTENSITY16:
  69          return GL_INTENSITY;
  70       case GL_RGB:
  71       case GL_R3_G3_B2:
  72       case GL_RGB4:
  73       case GL_RGB5:
  74       case GL_RGB8:
  75       case GL_RGB10:
  76       case GL_RGB12:
  77       case GL_RGB16:
  78          return GL_RGB;
  79       case GL_RGBA:
  80       case GL_RGBA2:
  81       case GL_RGBA4:
  82       case GL_RGB5_A1:
  83       case GL_RGBA8:
  84       case GL_RGB10_A2:
  85       case GL_RGBA12:
  86       case GL_RGBA16:
  87          return GL_RGBA;
  88       default:
  89          return -1;  /* error */
  90    }
  91 }
  92
  93
  94
  95 /**
  96  * Examine table's format and set the component sizes accordingly.
  97  */
  98 static void
  99 set_component_sizes( struct gl_color_table *table )
 100 {
 101    /* assuming the ubyte table */
 102    const GLubyte sz = 8;
 103
 104    switch (table->_BaseFormat) {
 105       case GL_ALPHA:
 106          table->RedSize = 0;
 107          table->GreenSize = 0;
 108          table->BlueSize = 0;
 109          table->AlphaSize = sz;
 110          table->IntensitySize = 0;
 111          table->LuminanceSize = 0;
 112          break;
 113       case GL_LUMINANCE:
 114          table->RedSize = 0;
 115          table->GreenSize = 0;
 116          table->BlueSize = 0;
 117          table->AlphaSize = 0;
 118          table->IntensitySize = 0;
 119          table->LuminanceSize = sz;
 120          break;
 121       case GL_LUMINANCE_ALPHA:
 122          table->RedSize = 0;
 123          table->GreenSize = 0;
 124          table->BlueSize = 0;
 125          table->AlphaSize = sz;
 126          table->IntensitySize = 0;
 127          table->LuminanceSize = sz;
 128          break;
 129       case GL_INTENSITY:
 130          table->RedSize = 0;
 131          table->GreenSize = 0;
 132          table->BlueSize = 0;
 133          table->AlphaSize = 0;
 134          table->IntensitySize = sz;
 135          table->LuminanceSize = 0;
 136          break;
 137       case GL_RGB:
 138          table->RedSize = sz;
 139          table->GreenSize = sz;
 140          table->BlueSize = sz;
 141          table->AlphaSize = 0;
 142          table->IntensitySize = 0;
 143          table->LuminanceSize = 0;
 144          break;
 145       case GL_RGBA:
 146          table->RedSize = sz;
 147          table->GreenSize = sz;
 148          table->BlueSize = sz;
 149          table->AlphaSize = sz;
 150          table->IntensitySize = 0;
 151          table->LuminanceSize = 0;
 152          break;
 153       default:
 154          _mesa_problem(NULL, "unexpected format in set_component_sizes");
 155    }
 156 }
 157
 158
 159
 160 /**
 161  * Update/replace all or part of a color table.  Helper function
 162  * used by _mesa_ColorTable() and _mesa_ColorSubTable().
 163  * The table->Table buffer should already be allocated.
 164  * \param start first entry to update
 165  * \param count number of entries to update
 166  * \param format format of user-provided table data
 167  * \param type datatype of user-provided table data
 168  * \param data user-provided table data
 169  * \param [rgba]Scale - RGBA scale factors
 170  * \param [rgba]Bias - RGBA bias factors
 171  */
 172 static void
 173 store_colortable_entries(GLcontext *ctx, struct gl_color_table *table,
 174                          GLsizei start, GLsizei count,
 175                          GLenum format, GLenum type, const GLvoid *data,
 176                          GLfloat rScale, GLfloat rBias,
 177                          GLfloat gScale, GLfloat gBias,
 178                          GLfloat bScale, GLfloat bBias,
 179                          GLfloat aScale, GLfloat aBias)
 180 {
 181    if (ctx->Unpack.BufferObj->Name) {
 182       /* Get/unpack the color table data from a PBO */
 183       GLubyte *buf;
 184       if (!_mesa_validate_pbo_access(1, &ctx->Unpack, count, 1, 1,
 185                                      format, type, data)) {
 186          _mesa_error(ctx, GL_INVALID_OPERATION,
 187                      "glColor[Sub]Table(bad PBO access)");
 188          return;
 189       }
 190       buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 191                                               GL_READ_ONLY_ARB,
 192                                               ctx->Unpack.BufferObj);
 193       if (!buf) {
 194          _mesa_error(ctx, GL_INVALID_OPERATION,
 195                      "glColor[Sub]Table(PBO mapped)");
 196          return;
 197       }
 198       data = ADD_POINTERS(buf, data);
 199    }
 200
 201
 202    {
 203       /* convert user-provided data to GLfloat values */
 204       GLfloat tempTab[MAX_COLOR_TABLE_SIZE * 4];
 205       GLfloat *tableF;
 206       GLint i;
 207
 208       _mesa_unpack_color_span_float(ctx,
 209                                     count,         /* number of pixels */
 210                                     table->_BaseFormat, /* dest format */
 211                                     tempTab,       /* dest address */
 212                                     format, type,  /* src format/type */
 213                                     data,          /* src data */
 214                                     &ctx->Unpack,
 215                                     IMAGE_CLAMP_BIT); /* transfer ops */
 216
 217       /* the destination */
 218       tableF = table->TableF;
 219
 220       /* Apply scale & bias & clamp now */
 221       switch (table->_BaseFormat) {
 222          case GL_INTENSITY:
 223             for (i = 0; i < count; i++) {
 224                GLuint j = start + i;
 225                tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
 226             }
 227             break;
 228          case GL_LUMINANCE:
 229             for (i = 0; i < count; i++) {
 230                GLuint j = start + i;
 231                tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
 232             }
 233             break;
 234          case GL_ALPHA:
 235             for (i = 0; i < count; i++) {
 236                GLuint j = start + i;
 237                tableF[j] = CLAMP(tempTab[i] * aScale + aBias, 0.0F, 1.0F);
 238             }
 239             break;
 240          case GL_LUMINANCE_ALPHA:
 241             for (i = 0; i < count; i++) {
 242                GLuint j = start + i;
 243                tableF[j*2+0] = CLAMP(tempTab[i*2+0] * rScale + rBias, 0.0F, 1.0F);
 244                tableF[j*2+1] = CLAMP(tempTab[i*2+1] * aScale + aBias, 0.0F, 1.0F);
 245             }
 246             break;
 247          case GL_RGB:
 248             for (i = 0; i < count; i++) {
 249                GLuint j = start + i;
 250                tableF[j*3+0] = CLAMP(tempTab[i*3+0] * rScale + rBias, 0.0F, 1.0F);
 251                tableF[j*3+1] = CLAMP(tempTab[i*3+1] * gScale + gBias, 0.0F, 1.0F);
 252                tableF[j*3+2] = CLAMP(tempTab[i*3+2] * bScale + bBias, 0.0F, 1.0F);
 253             }
 254             break;
 255          case GL_RGBA:
 256             for (i = 0; i < count; i++) {
 257                GLuint j = start + i;
 258                tableF[j*4+0] = CLAMP(tempTab[i*4+0] * rScale + rBias, 0.0F, 1.0F);
 259                tableF[j*4+1] = CLAMP(tempTab[i*4+1] * gScale + gBias, 0.0F, 1.0F);
 260                tableF[j*4+2] = CLAMP(tempTab[i*4+2] * bScale + bBias, 0.0F, 1.0F);
 261                tableF[j*4+3] = CLAMP(tempTab[i*4+3] * aScale + aBias, 0.0F, 1.0F);
 262             }
 263             break;
 264          default:
 265             _mesa_problem(ctx, "Bad format in store_colortable_entries");
 266             return;
 267          }
 268    }
 269
 270    /* update the ubyte table */
 271    {
 272       const GLint comps = _mesa_components_in_format(table->_BaseFormat);
 273       const GLfloat *tableF = table->TableF + start * comps;
 274       GLubyte *tableUB = table->TableUB + start * comps;
 275       GLint i;
 276       for (i = 0; i < count * comps; i++) {
 277          CLAMPED_FLOAT_TO_UBYTE(tableUB[i], tableF[i]);
 278       }
 279    }
 280
 281    if (ctx->Unpack.BufferObj->Name) {
 282       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 283                               ctx->Unpack.BufferObj);
 284    }
 285 }
 286
 287
 288
 289 void GLAPIENTRY
 290 _mesa_ColorTable( GLenum target, GLenum internalFormat,
 291                   GLsizei width, GLenum format, GLenum type,
 292                   const GLvoid *data )
 293 {
 294    static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
 295    static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
 296    GET_CURRENT_CONTEXT(ctx);
 297    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 298    struct gl_texture_object *texObj = NULL;
 299    struct gl_color_table *table = NULL;
 300    GLboolean proxy = GL_FALSE;
 301    GLint baseFormat;
 302    const GLfloat *scale = one, *bias = zero;
 303    GLint comps;
 304
 305    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */
 306
 307    switch (target) {
 308       case GL_TEXTURE_1D:
 309          texObj = texUnit->Current1D;
 310          table = &texObj->Palette;
 311          break;
 312       case GL_TEXTURE_2D:
 313          texObj = texUnit->Current2D;
 314          table = &texObj->Palette;
 315          break;
 316       case GL_TEXTURE_3D:
 317          texObj = texUnit->Current3D;
 318          table = &texObj->Palette;
 319          break;
 320       case GL_TEXTURE_CUBE_MAP_ARB:
 321          if (!ctx->Extensions.ARB_texture_cube_map) {
 322             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 323             return;
 324          }
 325          texObj = texUnit->CurrentCubeMap;
 326          table = &texObj->Palette;
 327          break;
 328       case GL_PROXY_TEXTURE_1D:
 329          texObj = ctx->Texture.Proxy1D;
 330          table = &texObj->Palette;
 331          proxy = GL_TRUE;
 332          break;
 333       case GL_PROXY_TEXTURE_2D:
 334          texObj = ctx->Texture.Proxy2D;
 335          table = &texObj->Palette;
 336          proxy = GL_TRUE;
 337          break;
 338       case GL_PROXY_TEXTURE_3D:
 339          texObj = ctx->Texture.Proxy3D;
 340          table = &texObj->Palette;
 341          proxy = GL_TRUE;
 342          break;
 343       case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
 344          if (!ctx->Extensions.ARB_texture_cube_map) {
 345             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 346             return;
 347          }
 348          texObj = ctx->Texture.ProxyCubeMap;
 349          table = &texObj->Palette;
 350          break;
 351       case GL_SHARED_TEXTURE_PALETTE_EXT:
 352          table = &ctx->Texture.Palette;
 353          break;
 354       case GL_COLOR_TABLE:
 355          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 356          scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 357          bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 358          break;
 359       case GL_PROXY_COLOR_TABLE:
 360          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
 361          proxy = GL_TRUE;
 362          break;
 363       case GL_TEXTURE_COLOR_TABLE_SGI:
 364          if (!ctx->Extensions.SGI_texture_color_table) {
 365             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 366             return;
 367          }
 368          table = &(texUnit->ColorTable);
 369          scale = ctx->Pixel.TextureColorTableScale;
 370          bias = ctx->Pixel.TextureColorTableBias;
 371          break;
 372       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 373          if (!ctx->Extensions.SGI_texture_color_table) {
 374             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 375             return;
 376          }
 377          table = &(texUnit->ProxyColorTable);
 378          proxy = GL_TRUE;
 379          break;
 380       case GL_POST_CONVOLUTION_COLOR_TABLE:
 381          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 382          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 383          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 384          break;
 385       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
 386          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
 387          proxy = GL_TRUE;
 388          break;
 389       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 390          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 391          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 392          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
 393          break;
 394       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
 395          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
 396          proxy = GL_TRUE;
 397          break;
 398       default:
 399          _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 400          return;
 401    }
 402
 403    assert(table);
 404
 405    if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
 406        format == GL_INTENSITY) {
 407       _mesa_error(ctx, GL_INVALID_OPERATION, "glColorTable(format or type)");
 408       return;
 409    }
 410
 411    baseFormat = base_colortab_format(internalFormat);
 412    if (baseFormat < 0) {
 413       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)");
 414       return;
 415    }
 416
 417    if (width < 0 || (width != 0 && _mesa_bitcount(width) != 1)) {
 418       /* error */
 419       if (proxy) {
 420          table->Size = 0;
 421          table->InternalFormat = (GLenum) 0;
 422          table->_BaseFormat = (GLenum) 0;
 423       }
 424       else {
 425          _mesa_error(ctx, GL_INVALID_VALUE, "glColorTable(width=%d)", width);
 426       }
 427       return;
 428    }
 429
 430    if (width > (GLsizei) ctx->Const.MaxColorTableSize) {
 431       if (proxy) {
 432          table->Size = 0;
 433          table->InternalFormat = (GLenum) 0;
 434          table->_BaseFormat = (GLenum) 0;
 435       }
 436       else {
 437          _mesa_error(ctx, GL_TABLE_TOO_LARGE, "glColorTable(width)");
 438       }
 439       return;
 440    }
 441
 442    table->Size = width;
 443    table->InternalFormat = internalFormat;
 444    table->_BaseFormat = (GLenum) baseFormat;
 445
 446    comps = _mesa_components_in_format(table->_BaseFormat);
 447    assert(comps > 0);  /* error should have been caught sooner */
 448
 449    if (!proxy) {
 450       _mesa_free_colortable_data(table);
 451
 452       if (width > 0) {
 453          table->TableF = (GLfloat *) _mesa_malloc(comps * width * sizeof(GLfloat));
 454          table->TableUB = (GLubyte *) _mesa_malloc(comps * width * sizeof(GLubyte));
 455
 456          if (!table->TableF || !table->TableUB) {
 457             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorTable");
 458             return;
 459          }
 460
 461          store_colortable_entries(ctx, table,
 462                                   0, width,  /* start, count */
 463                                   format, type, data,
 464                                   scale[0], bias[0],
 465                                   scale[1], bias[1],
 466                                   scale[2], bias[2],
 467                                   scale[3], bias[3]);
 468       }
 469    } /* proxy */
 470
 471    /* do this after the table's Type and Format are set */
 472    set_component_sizes(table);
 473
 474    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
 475       /* texture object palette, texObj==NULL means the shared palette */
 476       if (ctx->Driver.UpdateTexturePalette) {
 477          (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 478       }
 479    }
 480
 481    ctx->NewState |= _NEW_PIXEL;
 482 }
 483
 484
 485
 486 void GLAPIENTRY
 487 _mesa_ColorSubTable( GLenum target, GLsizei start,
 488                      GLsizei count, GLenum format, GLenum type,
 489                      const GLvoid *data )
 490 {
 491    static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
 492    static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
 493    GET_CURRENT_CONTEXT(ctx);
 494    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 495    struct gl_texture_object *texObj = NULL;
 496    struct gl_color_table *table = NULL;
 497    const GLfloat *scale = one, *bias = zero;
 498
 499    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 500
 501    switch (target) {
 502       case GL_TEXTURE_1D:
 503          texObj = texUnit->Current1D;
 504          table = &texObj->Palette;
 505          break;
 506       case GL_TEXTURE_2D:
 507          texObj = texUnit->Current2D;
 508          table = &texObj->Palette;
 509          break;
 510       case GL_TEXTURE_3D:
 511          texObj = texUnit->Current3D;
 512          table = &texObj->Palette;
 513          break;
 514       case GL_TEXTURE_CUBE_MAP_ARB:
 515          if (!ctx->Extensions.ARB_texture_cube_map) {
 516             _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 517             return;
 518          }
 519          texObj = texUnit->CurrentCubeMap;
 520          table = &texObj->Palette;
 521          break;
 522       case GL_SHARED_TEXTURE_PALETTE_EXT:
 523          table = &ctx->Texture.Palette;
 524          break;
 525       case GL_COLOR_TABLE:
 526          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 527          scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 528          bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 529          break;
 530       case GL_TEXTURE_COLOR_TABLE_SGI:
 531          if (!ctx->Extensions.SGI_texture_color_table) {
 532             _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 533             return;
 534          }
 535          table = &(texUnit->ColorTable);
 536          scale = ctx->Pixel.TextureColorTableScale;
 537          bias = ctx->Pixel.TextureColorTableBias;
 538          break;
 539       case GL_POST_CONVOLUTION_COLOR_TABLE:
 540          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 541          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 542          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 543          break;
 544       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 545          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 546          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 547          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
 548          break;
 549       default:
 550          _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 551          return;
 552    }
 553
 554    assert(table);
 555
 556    if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
 557        format == GL_INTENSITY) {
 558       _mesa_error(ctx, GL_INVALID_OPERATION, "glColorSubTable(format or type)");
 559       return;
 560    }
 561
 562    if (count < 1) {
 563       _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
 564       return;
 565    }
 566
 567    /* error should have been caught sooner */
 568    assert(_mesa_components_in_format(table->_BaseFormat) > 0);
 569
 570    if (start + count > (GLint) table->Size) {
 571       _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
 572       return;
 573    }
 574
 575    if (!table->TableF || !table->TableUB) {
 576       /* a GL_OUT_OF_MEMORY error would have been recorded previously */
 577       return;
 578    }
 579
 580    store_colortable_entries(ctx, table, start, count,
 581                             format, type, data,
 582                             scale[0], bias[0],
 583                             scale[1], bias[1],
 584                             scale[2], bias[2],
 585                             scale[3], bias[3]);
 586
 587    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
 588       /* per-texture object palette */
 589       if (ctx->Driver.UpdateTexturePalette) {
 590          (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 591       }
 592    }
 593
 594    ctx->NewState |= _NEW_PIXEL;
 595 }
 596
 597
 598
 599 void GLAPIENTRY
 600 _mesa_CopyColorTable(GLenum target, GLenum internalformat,
 601                      GLint x, GLint y, GLsizei width)
 602 {
 603    GET_CURRENT_CONTEXT(ctx);
 604    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 605
 606    /* Select buffer to read from */
 607    ctx->Driver.CopyColorTable( ctx, target, internalformat, x, y, width );
 608 }
 609
 610
 611
 612 void GLAPIENTRY
 613 _mesa_CopyColorSubTable(GLenum target, GLsizei start,
 614                         GLint x, GLint y, GLsizei width)
 615 {
 616    GET_CURRENT_CONTEXT(ctx);
 617    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 618
 619    ctx->Driver.CopyColorSubTable( ctx, target, start, x, y, width );
 620 }
 621
 622
 623
 624 void GLAPIENTRY
 625 _mesa_GetColorTable( GLenum target, GLenum format,
 626                      GLenum type, GLvoid *data )
 627 {
 628    GET_CURRENT_CONTEXT(ctx);
 629    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 630    struct gl_color_table *table = NULL;
 631    GLfloat rgba[MAX_COLOR_TABLE_SIZE][4];
 632    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 633
 634    if (ctx->NewState) {
 635       _mesa_update_state(ctx);
 636    }
 637
 638    switch (target) {
 639       case GL_TEXTURE_1D:
 640          table = &texUnit->Current1D->Palette;
 641          break;
 642       case GL_TEXTURE_2D:
 643          table = &texUnit->Current2D->Palette;
 644          break;
 645       case GL_TEXTURE_3D:
 646          table = &texUnit->Current3D->Palette;
 647          break;
 648       case GL_TEXTURE_CUBE_MAP_ARB:
 649          if (!ctx->Extensions.ARB_texture_cube_map) {
 650             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 651             return;
 652          }
 653          table = &texUnit->CurrentCubeMap->Palette;
 654          break;
 655       case GL_SHARED_TEXTURE_PALETTE_EXT:
 656          table = &ctx->Texture.Palette;
 657          break;
 658       case GL_COLOR_TABLE:
 659          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 660          break;
 661       case GL_TEXTURE_COLOR_TABLE_SGI:
 662          if (!ctx->Extensions.SGI_texture_color_table) {
 663             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 664             return;
 665          }
 666          table = &(texUnit->ColorTable);
 667          break;
 668       case GL_POST_CONVOLUTION_COLOR_TABLE:
 669          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 670          break;
 671       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 672          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 673          break;
 674       default:
 675          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 676          return;
 677    }
 678
 679    ASSERT(table);
 680
 681    if (table->Size <= 0) {
 682       return;
 683    }
 684
 685    switch (table->_BaseFormat) {
 686    case GL_ALPHA:
 687       {
 688          GLuint i;
 689          for (i = 0; i < table->Size; i++) {
 690             rgba[i][RCOMP] = 0;
 691             rgba[i][GCOMP] = 0;
 692             rgba[i][BCOMP] = 0;
 693             rgba[i][ACOMP] = table->TableF[i];
 694          }
 695       }
 696       break;
 697    case GL_LUMINANCE:
 698       {
 699          GLuint i;
 700          for (i = 0; i < table->Size; i++) {
 701             rgba[i][RCOMP] =
 702             rgba[i][GCOMP] =
 703             rgba[i][BCOMP] = table->TableF[i];
 704             rgba[i][ACOMP] = 1.0F;
 705          }
 706       }
 707       break;
 708    case GL_LUMINANCE_ALPHA:
 709       {
 710          GLuint i;
 711          for (i = 0; i < table->Size; i++) {
 712             rgba[i][RCOMP] =
 713             rgba[i][GCOMP] =
 714             rgba[i][BCOMP] = table->TableF[i*2+0];
 715             rgba[i][ACOMP] = table->TableF[i*2+1];
 716          }
 717       }
 718       break;
 719    case GL_INTENSITY:
 720       {
 721          GLuint i;
 722          for (i = 0; i < table->Size; i++) {
 723             rgba[i][RCOMP] =
 724             rgba[i][GCOMP] =
 725             rgba[i][BCOMP] =
 726             rgba[i][ACOMP] = table->TableF[i];
 727          }
 728       }
 729       break;
 730    case GL_RGB:
 731       {
 732          GLuint i;
 733          for (i = 0; i < table->Size; i++) {
 734             rgba[i][RCOMP] = table->TableF[i*3+0];
 735             rgba[i][GCOMP] = table->TableF[i*3+1];
 736             rgba[i][BCOMP] = table->TableF[i*3+2];
 737             rgba[i][ACOMP] = 1.0F;
 738          }
 739       }
 740       break;
 741    case GL_RGBA:
 742       _mesa_memcpy(rgba, table->TableF, 4 * table->Size * sizeof(GLfloat));
 743       break;
 744    default:
 745       _mesa_problem(ctx, "bad table format in glGetColorTable");
 746       return;
 747    }
 748
 749    if (ctx->Pack.BufferObj->Name) {
 750       /* pack color table into PBO */
 751       GLubyte *buf;
 752       if (!_mesa_validate_pbo_access(1, &ctx->Pack, table->Size, 1, 1,
 753                                      format, type, data)) {
 754          _mesa_error(ctx, GL_INVALID_OPERATION,
 755                      "glGetColorTable(invalid PBO access)");
 756          return;
 757       }
 758       buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
 759                                               GL_WRITE_ONLY_ARB,
 760                                               ctx->Pack.BufferObj);
 761       if (!buf) {
 762          /* buffer is already mapped - that's an error */
 763          _mesa_error(ctx, GL_INVALID_OPERATION,
 764                      "glGetColorTable(PBO is mapped)");
 765          return;
 766       }
 767       data = ADD_POINTERS(buf, data);
 768    }
 769
 770    _mesa_pack_rgba_span_float(ctx, table->Size, rgba,
 771                               format, type, data, &ctx->Pack, 0x0);
 772
 773    if (ctx->Pack.BufferObj->Name) {
 774       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
 775                               ctx->Pack.BufferObj);
 776    }
 777 }
 778
 779
 780
 781 void GLAPIENTRY
 782 _mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 783 {
 784    GET_CURRENT_CONTEXT(ctx);
 785    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 786
 787    switch (target) {
 788       case GL_COLOR_TABLE_SGI:
 789          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 790             COPY_4V(ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION], params);
 791          }
 792          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 793             COPY_4V(ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION], params);
 794          }
 795          else {
 796             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
 797             return;
 798          }
 799          break;
 800       case GL_TEXTURE_COLOR_TABLE_SGI:
 801          if (!ctx->Extensions.SGI_texture_color_table) {
 802             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameter(target)");
 803             return;
 804          }
 805          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 806             COPY_4V(ctx->Pixel.TextureColorTableScale, params);
 807          }
 808          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 809             COPY_4V(ctx->Pixel.TextureColorTableBias, params);
 810          }
 811          else {
 812             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
 813             return;
 814          }
 815          break;
 816       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 817          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 818             COPY_4V(ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION], params);
 819          }
 820          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 821             COPY_4V(ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION], params);
 822          }
 823          else {
 824             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
 825             return;
 826          }
 827          break;
 828       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 829          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 830             COPY_4V(ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX], params);
 831          }
 832          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 833             COPY_4V(ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX], params);
 834          }
 835          else {
 836             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
 837             return;
 838          }
 839          break;
 840       default:
 841          _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameter(target)");
 842          return;
 843    }
 844
 845    ctx->NewState |= _NEW_PIXEL;
 846 }
 847
 848
 849
 850 void GLAPIENTRY
 851 _mesa_ColorTableParameteriv(GLenum target, GLenum pname, const GLint *params)
 852 {
 853    GLfloat fparams[4];
 854    if (pname == GL_COLOR_TABLE_SGI ||
 855        pname == GL_TEXTURE_COLOR_TABLE_SGI ||
 856        pname == GL_POST_CONVOLUTION_COLOR_TABLE_SGI ||
 857        pname == GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI) {
 858       /* four values */
 859       fparams[0] = (GLfloat) params[0];
 860       fparams[1] = (GLfloat) params[1];
 861       fparams[2] = (GLfloat) params[2];
 862       fparams[3] = (GLfloat) params[3];
 863    }
 864    else {
 865       /* one values */
 866       fparams[0] = (GLfloat) params[0];
 867    }
 868    _mesa_ColorTableParameterfv(target, pname, fparams);
 869 }
 870
 871
 872
 873 void GLAPIENTRY
 874 _mesa_GetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )
 875 {
 876    GET_CURRENT_CONTEXT(ctx);
 877    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 878    struct gl_color_table *table = NULL;
 879    ASSERT_OUTSIDE_BEGIN_END(ctx);
 880
 881    switch (target) {
 882       case GL_TEXTURE_1D:
 883          table = &texUnit->Current1D->Palette;
 884          break;
 885       case GL_TEXTURE_2D:
 886          table = &texUnit->Current2D->Palette;
 887          break;
 888       case GL_TEXTURE_3D:
 889          table = &texUnit->Current3D->Palette;
 890          break;
 891       case GL_TEXTURE_CUBE_MAP_ARB:
 892          if (!ctx->Extensions.ARB_texture_cube_map) {
 893             _mesa_error(ctx, GL_INVALID_ENUM,
 894                         "glGetColorTableParameterfv(target)");
 895             return;
 896          }
 897          table = &texUnit->CurrentCubeMap->Palette;
 898          break;
 899       case GL_PROXY_TEXTURE_1D:
 900          table = &ctx->Texture.Proxy1D->Palette;
 901          break;
 902       case GL_PROXY_TEXTURE_2D:
 903          table = &ctx->Texture.Proxy2D->Palette;
 904          break;
 905       case GL_PROXY_TEXTURE_3D:
 906          table = &ctx->Texture.Proxy3D->Palette;
 907          break;
 908       case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
 909          if (!ctx->Extensions.ARB_texture_cube_map) {
 910             _mesa_error(ctx, GL_INVALID_ENUM,
 911                         "glGetColorTableParameterfv(target)");
 912             return;
 913          }
 914          table = &ctx->Texture.ProxyCubeMap->Palette;
 915          break;
 916       case GL_SHARED_TEXTURE_PALETTE_EXT:
 917          table = &ctx->Texture.Palette;
 918          break;
 919       case GL_COLOR_TABLE:
 920          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 921          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 922             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION]);
 923             return;
 924          }
 925          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 926             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION]);
 927             return;
 928          }
 929          break;
 930       case GL_PROXY_COLOR_TABLE:
 931          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
 932          break;
 933       case GL_TEXTURE_COLOR_TABLE_SGI:
 934          if (!ctx->Extensions.SGI_texture_color_table) {
 935             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 936             return;
 937          }
 938          table = &(texUnit->ColorTable);
 939          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 940             COPY_4V(params, ctx->Pixel.TextureColorTableScale);
 941             return;
 942          }
 943          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 944             COPY_4V(params, ctx->Pixel.TextureColorTableBias);
 945             return;
 946          }
 947          break;
 948       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 949          if (!ctx->Extensions.SGI_texture_color_table) {
 950             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 951             return;
 952          }
 953          table = &(texUnit->ProxyColorTable);
 954          break;
 955       case GL_POST_CONVOLUTION_COLOR_TABLE:
 956          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 957          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 958             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION]);
 959             return;
 960          }
 961          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 962             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION]);
 963             return;
 964          }
 965          break;
 966       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
 967          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
 968          break;
 969       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 970          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 971          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 972             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX]);
 973             return;
 974          }
 975          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 976             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX]);
 977             return;
 978          }
 979          break;
 980       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
 981          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
 982          break;
 983       default:
 984          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameterfv(target)");
 985          return;
 986    }
 987
 988    assert(table);
 989
 990    switch (pname) {
 991       case GL_COLOR_TABLE_FORMAT:
 992          *params = (GLfloat) table->InternalFormat;
 993          break;
 994       case GL_COLOR_TABLE_WIDTH:
 995          *params = (GLfloat) table->Size;
 996          break;
 997       case GL_COLOR_TABLE_RED_SIZE:
 998          *params = (GLfloat) table->RedSize;
 999          break;
1000       case GL_COLOR_TABLE_GREEN_SIZE:
1001          *params = (GLfloat) table->GreenSize;
1002          break;
1003       case GL_COLOR_TABLE_BLUE_SIZE:
1004          *params = (GLfloat) table->BlueSize;
1005          break;
1006       case GL_COLOR_TABLE_ALPHA_SIZE:
1007          *params = (GLfloat) table->AlphaSize;
1008          break;
1009       case GL_COLOR_TABLE_LUMINANCE_SIZE:
1010          *params = (GLfloat) table->LuminanceSize;
1011          break;
1012       case GL_COLOR_TABLE_INTENSITY_SIZE:
1013          *params = (GLfloat) table->IntensitySize;
1014          break;
1015       default:
1016          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameterfv(pname)" );
1017          return;
1018    }
1019 }
1020
1021
1022
1023 void GLAPIENTRY
1024 _mesa_GetColorTableParameteriv( GLenum target, GLenum pname, GLint *params )
1025 {
1026    GET_CURRENT_CONTEXT(ctx);
1027    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
1028    struct gl_color_table *table = NULL;
1029    ASSERT_OUTSIDE_BEGIN_END(ctx);
1030
1031    switch (target) {
1032       case GL_TEXTURE_1D:
1033          table = &texUnit->Current1D->Palette;
1034          break;
1035       case GL_TEXTURE_2D:
1036          table = &texUnit->Current2D->Palette;
1037          break;
1038       case GL_TEXTURE_3D:
1039          table = &texUnit->Current3D->Palette;
1040          break;
1041       case GL_TEXTURE_CUBE_MAP_ARB:
1042          if (!ctx->Extensions.ARB_texture_cube_map) {
1043             _mesa_error(ctx, GL_INVALID_ENUM,
1044                         "glGetColorTableParameteriv(target)");
1045             return;
1046          }
1047          table = &texUnit->CurrentCubeMap->Palette;
1048          break;
1049       case GL_PROXY_TEXTURE_1D:
1050          table = &ctx->Texture.Proxy1D->Palette;
1051          break;
1052       case GL_PROXY_TEXTURE_2D:
1053          table = &ctx->Texture.Proxy2D->Palette;
1054          break;
1055       case GL_PROXY_TEXTURE_3D:
1056          table = &ctx->Texture.Proxy3D->Palette;
1057          break;
1058       case GL_PROXY_TEXTURE_CUBE_MAP_ARB:
1059          if (!ctx->Extensions.ARB_texture_cube_map) {
1060             _mesa_error(ctx, GL_INVALID_ENUM,
1061                         "glGetColorTableParameteriv(target)");
1062             return;
1063          }
1064          table = &ctx->Texture.ProxyCubeMap->Palette;
1065          break;
1066       case GL_SHARED_TEXTURE_PALETTE_EXT:
1067          table = &ctx->Texture.Palette;
1068          break;
1069       case GL_COLOR_TABLE:
1070          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
1071          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
1072             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
1073             params[0] = (GLint) scale[0];
1074             params[1] = (GLint) scale[1];
1075             params[2] = (GLint) scale[2];
1076             params[3] = (GLint) scale[3];
1077             return;
1078          }
1079          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
1080             GLfloat *bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
1081             params[0] = (GLint) bias[0];
1082             params[1] = (GLint) bias[1];
1083             params[2] = (GLint) bias[2];
1084             params[3] = (GLint) bias[3];
1085             return;
1086          }
1087          break;
1088       case GL_PROXY_COLOR_TABLE:
1089          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
1090          break;
1091       case GL_TEXTURE_COLOR_TABLE_SGI:
1092          if (!ctx->Extensions.SGI_texture_color_table) {
1093             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
1094             return;
1095          }
1096          table = &(texUnit->ColorTable);
1097          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
1098             params[0] = (GLint) ctx->Pixel.TextureColorTableScale[0];
1099             params[1] = (GLint) ctx->Pixel.TextureColorTableScale[1];
1100             params[2] = (GLint) ctx->Pixel.TextureColorTableScale[2];
1101             params[3] = (GLint) ctx->Pixel.TextureColorTableScale[3];
1102             return;
1103          }
1104          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
1105             params[0] = (GLint) ctx->Pixel.TextureColorTableBias[0];
1106             params[1] = (GLint) ctx->Pixel.TextureColorTableBias[1];
1107             params[2] = (GLint) ctx->Pixel.TextureColorTableBias[2];
1108             params[3] = (GLint) ctx->Pixel.TextureColorTableBias[3];
1109             return;
1110          }
1111          break;
1112       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
1113          if (!ctx->Extensions.SGI_texture_color_table) {
1114             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
1115             return;
1116          }
1117          table = &(texUnit->ProxyColorTable);
1118          break;
1119       case GL_POST_CONVOLUTION_COLOR_TABLE:
1120          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
1121          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
1122             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
1123             params[0] = (GLint) scale[0];
1124             params[1] = (GLint) scale[1];
1125             params[2] = (GLint) scale[2];
1126             params[3] = (GLint) scale[3];
1127             return;
1128          }
1129          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
1130             GLfloat *bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
1131             params[0] = (GLint) bias[0];
1132             params[1] = (GLint) bias[1];
1133             params[2] = (GLint) bias[2];
1134             params[3] = (GLint) bias[3];
1135             return;
1136          }
1137          break;
1138       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
1139          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
1140          break;
1141       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
1142          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
1143          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
1144             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
1145             params[0] = (GLint) scale[0];
1146             params[0] = (GLint) scale[1];
1147             params[0] = (GLint) scale[2];
1148             params[0] = (GLint) scale[3];
1149             return;
1150          }
1151          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
1152             GLfloat *bias = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
1153             params[0] = (GLint) bias[0];
1154             params[1] = (GLint) bias[1];
1155             params[2] = (GLint) bias[2];
1156             params[3] = (GLint) bias[3];
1157             return;
1158          }
1159          break;
1160       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
1161          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
1162          break;
1163       default:
1164          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameteriv(target)");
1165          return;
1166    }
1167
1168    assert(table);
1169
1170    switch (pname) {
1171       case GL_COLOR_TABLE_FORMAT:
1172          *params = table->InternalFormat;
1173          break;
1174       case GL_COLOR_TABLE_WIDTH:
1175          *params = table->Size;
1176          break;
1177       case GL_COLOR_TABLE_RED_SIZE:
1178          *params = table->RedSize;
1179          break;
1180       case GL_COLOR_TABLE_GREEN_SIZE:
1181          *params = table->GreenSize;
1182          break;
1183       case GL_COLOR_TABLE_BLUE_SIZE:
1184          *params = table->BlueSize;
1185          break;
1186       case GL_COLOR_TABLE_ALPHA_SIZE:
1187          *params = table->AlphaSize;
1188          break;
1189       case GL_COLOR_TABLE_LUMINANCE_SIZE:
1190          *params = table->LuminanceSize;
1191          break;
1192       case GL_COLOR_TABLE_INTENSITY_SIZE:
1193          *params = table->IntensitySize;
1194          break;
1195       default:
1196          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameteriv(pname)" );
1197          return;
1198    }
1199 }
1200
1201 /**********************************************************************/
1202 /*****                      Initialization                        *****/
1203 /**********************************************************************/
1204
1205
1206 void
1207 _mesa_init_colortable( struct gl_color_table *p )
1208 {
1209    p->TableF = NULL;
1210    p->TableUB = NULL;
1211    p->Size = 0;
1212    p->InternalFormat = GL_RGBA;
1213 }
1214
1215
1216
1217 void
1218 _mesa_free_colortable_data( struct gl_color_table *p )
1219 {
1220    if (p->TableF) {
1221       _mesa_free(p->TableF);
1222       p->TableF = NULL;
1223    }
1224    if (p->TableUB) {
1225       _mesa_free(p->TableUB);
1226       p->TableUB = NULL;
1227    }
1228 }
1229
1230
1231 /*
1232  * Initialize all colortables for a context.
1233  */
1234 void
1235 _mesa_init_colortables( GLcontext * ctx )
1236 {
1237    GLuint i;
1238    for (i = 0; i < COLORTABLE_MAX; i++) {
1239       _mesa_init_colortable(&ctx->ColorTable[i]);
1240       _mesa_init_colortable(&ctx->ProxyColorTable[i]);
1241    }
1242 }
1243
1244
1245 /*
1246  * Free all colortable data for a context
1247  */
1248 void
1249 _mesa_free_colortables_data( GLcontext *ctx )
1250 {
1251    GLuint i;
1252    for (i = 0; i < COLORTABLE_MAX; i++) {
1253       _mesa_free_colortable_data(&ctx->ColorTable[i]);
1254       _mesa_free_colortable_data(&ctx->ProxyColorTable[i]);
1255    }
1256 }