src/mesa/main/colortab.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   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 #include "teximage.h"
  34
  35
  36 /**
  37  * Given an internalFormat token passed to glColorTable,
  38  * return the corresponding base format.
  39  * Return -1 if invalid token.
  40  */
  41 static GLint
  42 base_colortab_format( GLenum format )
  43 {
  44    switch (format) {
  45       case GL_ALPHA:
  46       case GL_ALPHA4:
  47       case GL_ALPHA8:
  48       case GL_ALPHA12:
  49       case GL_ALPHA16:
  50          return GL_ALPHA;
  51       case GL_LUMINANCE:
  52       case GL_LUMINANCE4:
  53       case GL_LUMINANCE8:
  54       case GL_LUMINANCE12:
  55       case GL_LUMINANCE16:
  56          return GL_LUMINANCE;
  57       case GL_LUMINANCE_ALPHA:
  58       case GL_LUMINANCE4_ALPHA4:
  59       case GL_LUMINANCE6_ALPHA2:
  60       case GL_LUMINANCE8_ALPHA8:
  61       case GL_LUMINANCE12_ALPHA4:
  62       case GL_LUMINANCE12_ALPHA12:
  63       case GL_LUMINANCE16_ALPHA16:
  64          return GL_LUMINANCE_ALPHA;
  65       case GL_INTENSITY:
  66       case GL_INTENSITY4:
  67       case GL_INTENSITY8:
  68       case GL_INTENSITY12:
  69       case GL_INTENSITY16:
  70          return GL_INTENSITY;
  71       case GL_RGB:
  72       case GL_R3_G3_B2:
  73       case GL_RGB4:
  74       case GL_RGB5:
  75       case GL_RGB8:
  76       case GL_RGB10:
  77       case GL_RGB12:
  78       case GL_RGB16:
  79          return GL_RGB;
  80       case GL_RGBA:
  81       case GL_RGBA2:
  82       case GL_RGBA4:
  83       case GL_RGB5_A1:
  84       case GL_RGBA8:
  85       case GL_RGB10_A2:
  86       case GL_RGBA12:
  87       case GL_RGBA16:
  88          return GL_RGBA;
  89       default:
  90          return -1;  /* error */
  91    }
  92 }
  93
  94
  95
  96 /**
  97  * Examine table's format and set the component sizes accordingly.
  98  */
  99 static void
 100 set_component_sizes( struct gl_color_table *table )
 101 {
 102    /* assuming the ubyte table */
 103    const GLubyte sz = 8;
 104
 105    switch (table->_BaseFormat) {
 106       case GL_ALPHA:
 107          table->RedSize = 0;
 108          table->GreenSize = 0;
 109          table->BlueSize = 0;
 110          table->AlphaSize = sz;
 111          table->IntensitySize = 0;
 112          table->LuminanceSize = 0;
 113          break;
 114       case GL_LUMINANCE:
 115          table->RedSize = 0;
 116          table->GreenSize = 0;
 117          table->BlueSize = 0;
 118          table->AlphaSize = 0;
 119          table->IntensitySize = 0;
 120          table->LuminanceSize = sz;
 121          break;
 122       case GL_LUMINANCE_ALPHA:
 123          table->RedSize = 0;
 124          table->GreenSize = 0;
 125          table->BlueSize = 0;
 126          table->AlphaSize = sz;
 127          table->IntensitySize = 0;
 128          table->LuminanceSize = sz;
 129          break;
 130       case GL_INTENSITY:
 131          table->RedSize = 0;
 132          table->GreenSize = 0;
 133          table->BlueSize = 0;
 134          table->AlphaSize = 0;
 135          table->IntensitySize = sz;
 136          table->LuminanceSize = 0;
 137          break;
 138       case GL_RGB:
 139          table->RedSize = sz;
 140          table->GreenSize = sz;
 141          table->BlueSize = sz;
 142          table->AlphaSize = 0;
 143          table->IntensitySize = 0;
 144          table->LuminanceSize = 0;
 145          break;
 146       case GL_RGBA:
 147          table->RedSize = sz;
 148          table->GreenSize = sz;
 149          table->BlueSize = sz;
 150          table->AlphaSize = sz;
 151          table->IntensitySize = 0;
 152          table->LuminanceSize = 0;
 153          break;
 154       default:
 155          _mesa_problem(NULL, "unexpected format in set_component_sizes");
 156    }
 157 }
 158
 159
 160
 161 /**
 162  * Update/replace all or part of a color table.  Helper function
 163  * used by _mesa_ColorTable() and _mesa_ColorSubTable().
 164  * The table->Table buffer should already be allocated.
 165  * \param start first entry to update
 166  * \param count number of entries to update
 167  * \param format format of user-provided table data
 168  * \param type datatype of user-provided table data
 169  * \param data user-provided table data
 170  * \param [rgba]Scale - RGBA scale factors
 171  * \param [rgba]Bias - RGBA bias factors
 172  */
 173 static void
 174 store_colortable_entries(GLcontext *ctx, struct gl_color_table *table,
 175                          GLsizei start, GLsizei count,
 176                          GLenum format, GLenum type, const GLvoid *data,
 177                          GLfloat rScale, GLfloat rBias,
 178                          GLfloat gScale, GLfloat gBias,
 179                          GLfloat bScale, GLfloat bBias,
 180                          GLfloat aScale, GLfloat aBias)
 181 {
 182    if (ctx->Unpack.BufferObj->Name) {
 183       /* Get/unpack the color table data from a PBO */
 184       GLubyte *buf;
 185       if (!_mesa_validate_pbo_access(1, &ctx->Unpack, count, 1, 1,
 186                                      format, type, data)) {
 187          _mesa_error(ctx, GL_INVALID_OPERATION,
 188                      "glColor[Sub]Table(bad PBO access)");
 189          return;
 190       }
 191       buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 192                                               GL_READ_ONLY_ARB,
 193                                               ctx->Unpack.BufferObj);
 194       if (!buf) {
 195          _mesa_error(ctx, GL_INVALID_OPERATION,
 196                      "glColor[Sub]Table(PBO mapped)");
 197          return;
 198       }
 199       data = ADD_POINTERS(buf, data);
 200    }
 201
 202
 203    {
 204       /* convert user-provided data to GLfloat values */
 205       GLfloat tempTab[MAX_COLOR_TABLE_SIZE * 4];
 206       GLfloat *tableF;
 207       GLint i;
 208
 209       _mesa_unpack_color_span_float(ctx,
 210                                     count,         /* number of pixels */
 211                                     table->_BaseFormat, /* dest format */
 212                                     tempTab,       /* dest address */
 213                                     format, type,  /* src format/type */
 214                                     data,          /* src data */
 215                                     &ctx->Unpack,
 216                                     IMAGE_CLAMP_BIT); /* transfer ops */
 217
 218       /* the destination */
 219       tableF = table->TableF;
 220
 221       /* Apply scale & bias & clamp now */
 222       switch (table->_BaseFormat) {
 223          case GL_INTENSITY:
 224             for (i = 0; i < count; i++) {
 225                GLuint j = start + i;
 226                tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
 227             }
 228             break;
 229          case GL_LUMINANCE:
 230             for (i = 0; i < count; i++) {
 231                GLuint j = start + i;
 232                tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
 233             }
 234             break;
 235          case GL_ALPHA:
 236             for (i = 0; i < count; i++) {
 237                GLuint j = start + i;
 238                tableF[j] = CLAMP(tempTab[i] * aScale + aBias, 0.0F, 1.0F);
 239             }
 240             break;
 241          case GL_LUMINANCE_ALPHA:
 242             for (i = 0; i < count; i++) {
 243                GLuint j = start + i;
 244                tableF[j*2+0] = CLAMP(tempTab[i*2+0] * rScale + rBias, 0.0F, 1.0F);
 245                tableF[j*2+1] = CLAMP(tempTab[i*2+1] * aScale + aBias, 0.0F, 1.0F);
 246             }
 247             break;
 248          case GL_RGB:
 249             for (i = 0; i < count; i++) {
 250                GLuint j = start + i;
 251                tableF[j*3+0] = CLAMP(tempTab[i*3+0] * rScale + rBias, 0.0F, 1.0F);
 252                tableF[j*3+1] = CLAMP(tempTab[i*3+1] * gScale + gBias, 0.0F, 1.0F);
 253                tableF[j*3+2] = CLAMP(tempTab[i*3+2] * bScale + bBias, 0.0F, 1.0F);
 254             }
 255             break;
 256          case GL_RGBA:
 257             for (i = 0; i < count; i++) {
 258                GLuint j = start + i;
 259                tableF[j*4+0] = CLAMP(tempTab[i*4+0] * rScale + rBias, 0.0F, 1.0F);
 260                tableF[j*4+1] = CLAMP(tempTab[i*4+1] * gScale + gBias, 0.0F, 1.0F);
 261                tableF[j*4+2] = CLAMP(tempTab[i*4+2] * bScale + bBias, 0.0F, 1.0F);
 262                tableF[j*4+3] = CLAMP(tempTab[i*4+3] * aScale + aBias, 0.0F, 1.0F);
 263             }
 264             break;
 265          default:
 266             _mesa_problem(ctx, "Bad format in store_colortable_entries");
 267             return;
 268          }
 269    }
 270
 271    /* update the ubyte table */
 272    {
 273       const GLint comps = _mesa_components_in_format(table->_BaseFormat);
 274       const GLfloat *tableF = table->TableF + start * comps;
 275       GLubyte *tableUB = table->TableUB + start * comps;
 276       GLint i;
 277       for (i = 0; i < count * comps; i++) {
 278          CLAMPED_FLOAT_TO_UBYTE(tableUB[i], tableF[i]);
 279       }
 280    }
 281
 282    if (ctx->Unpack.BufferObj->Name) {
 283       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 284                               ctx->Unpack.BufferObj);
 285    }
 286 }
 287
 288
 289
 290 void GLAPIENTRY
 291 _mesa_ColorTable( GLenum target, GLenum internalFormat,
 292                   GLsizei width, GLenum format, GLenum type,
 293                   const GLvoid *data )
 294 {
 295    static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
 296    static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
 297    GET_CURRENT_CONTEXT(ctx);
 298    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 299    struct gl_texture_object *texObj = NULL;
 300    struct gl_color_table *table = NULL;
 301    GLboolean proxy = GL_FALSE;
 302    GLint baseFormat;
 303    const GLfloat *scale = one, *bias = zero;
 304    GLint comps;
 305
 306    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */
 307
 308    switch (target) {
 309       case GL_SHARED_TEXTURE_PALETTE_EXT:
 310          table = &ctx->Texture.Palette;
 311          break;
 312       case GL_COLOR_TABLE:
 313          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 314          scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 315          bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 316          break;
 317       case GL_PROXY_COLOR_TABLE:
 318          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
 319          proxy = GL_TRUE;
 320          break;
 321       case GL_TEXTURE_COLOR_TABLE_SGI:
 322          if (!ctx->Extensions.SGI_texture_color_table) {
 323             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 324             return;
 325          }
 326          table = &(texUnit->ColorTable);
 327          scale = ctx->Pixel.TextureColorTableScale;
 328          bias = ctx->Pixel.TextureColorTableBias;
 329          break;
 330       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 331          if (!ctx->Extensions.SGI_texture_color_table) {
 332             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 333             return;
 334          }
 335          table = &(texUnit->ProxyColorTable);
 336          proxy = GL_TRUE;
 337          break;
 338       case GL_POST_CONVOLUTION_COLOR_TABLE:
 339          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 340          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 341          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 342          break;
 343       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
 344          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
 345          proxy = GL_TRUE;
 346          break;
 347       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 348          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 349          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 350          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
 351          break;
 352       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
 353          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
 354          proxy = GL_TRUE;
 355          break;
 356       default:
 357          /* try texture targets */
 358          {
 359             struct gl_texture_object *texobj
 360                = _mesa_select_tex_object(ctx, texUnit, target);
 361             if (texobj) {
 362                table = &texobj->Palette;
 363                proxy = _mesa_is_proxy_texture(target);
 364             }
 365             else {
 366                _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 367                return;
 368             }
 369          }
 370    }
 371
 372    assert(table);
 373
 374    if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
 375        format == GL_INTENSITY) {
 376       _mesa_error(ctx, GL_INVALID_OPERATION, "glColorTable(format or type)");
 377       return;
 378    }
 379
 380    baseFormat = base_colortab_format(internalFormat);
 381    if (baseFormat < 0) {
 382       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)");
 383       return;
 384    }
 385
 386    if (width < 0 || (width != 0 && _mesa_bitcount(width) != 1)) {
 387       /* error */
 388       if (proxy) {
 389          table->Size = 0;
 390          table->InternalFormat = (GLenum) 0;
 391          table->_BaseFormat = (GLenum) 0;
 392       }
 393       else {
 394          _mesa_error(ctx, GL_INVALID_VALUE, "glColorTable(width=%d)", width);
 395       }
 396       return;
 397    }
 398
 399    if (width > (GLsizei) ctx->Const.MaxColorTableSize) {
 400       if (proxy) {
 401          table->Size = 0;
 402          table->InternalFormat = (GLenum) 0;
 403          table->_BaseFormat = (GLenum) 0;
 404       }
 405       else {
 406          _mesa_error(ctx, GL_TABLE_TOO_LARGE, "glColorTable(width)");
 407       }
 408       return;
 409    }
 410
 411    table->Size = width;
 412    table->InternalFormat = internalFormat;
 413    table->_BaseFormat = (GLenum) baseFormat;
 414
 415    comps = _mesa_components_in_format(table->_BaseFormat);
 416    assert(comps > 0);  /* error should have been caught sooner */
 417
 418    if (!proxy) {
 419       _mesa_free_colortable_data(table);
 420
 421       if (width > 0) {
 422          table->TableF = (GLfloat *) _mesa_malloc(comps * width * sizeof(GLfloat));
 423          table->TableUB = (GLubyte *) _mesa_malloc(comps * width * sizeof(GLubyte));
 424
 425          if (!table->TableF || !table->TableUB) {
 426             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorTable");
 427             return;
 428          }
 429
 430          store_colortable_entries(ctx, table,
 431                                   0, width,  /* start, count */
 432                                   format, type, data,
 433                                   scale[0], bias[0],
 434                                   scale[1], bias[1],
 435                                   scale[2], bias[2],
 436                                   scale[3], bias[3]);
 437       }
 438    } /* proxy */
 439
 440    /* do this after the table's Type and Format are set */
 441    set_component_sizes(table);
 442
 443    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
 444       /* texture object palette, texObj==NULL means the shared palette */
 445       if (ctx->Driver.UpdateTexturePalette) {
 446          (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 447       }
 448    }
 449
 450    ctx->NewState |= _NEW_PIXEL;
 451 }
 452
 453
 454
 455 void GLAPIENTRY
 456 _mesa_ColorSubTable( GLenum target, GLsizei start,
 457                      GLsizei count, GLenum format, GLenum type,
 458                      const GLvoid *data )
 459 {
 460    static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
 461    static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
 462    GET_CURRENT_CONTEXT(ctx);
 463    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 464    struct gl_texture_object *texObj = NULL;
 465    struct gl_color_table *table = NULL;
 466    const GLfloat *scale = one, *bias = zero;
 467
 468    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 469
 470    switch (target) {
 471       case GL_SHARED_TEXTURE_PALETTE_EXT:
 472          table = &ctx->Texture.Palette;
 473          break;
 474       case GL_COLOR_TABLE:
 475          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 476          scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 477          bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 478          break;
 479       case GL_TEXTURE_COLOR_TABLE_SGI:
 480          if (!ctx->Extensions.SGI_texture_color_table) {
 481             _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 482             return;
 483          }
 484          table = &(texUnit->ColorTable);
 485          scale = ctx->Pixel.TextureColorTableScale;
 486          bias = ctx->Pixel.TextureColorTableBias;
 487          break;
 488       case GL_POST_CONVOLUTION_COLOR_TABLE:
 489          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 490          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 491          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 492          break;
 493       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 494          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 495          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 496          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
 497          break;
 498       default:
 499          /* try texture targets */
 500          texObj = _mesa_select_tex_object(ctx, texUnit, target);
 501          if (texObj && !_mesa_is_proxy_texture(target)) {
 502             table = &texObj->Palette;
 503          }
 504          else {
 505             _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 506             return;
 507          }
 508    }
 509
 510    assert(table);
 511
 512    if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
 513        format == GL_INTENSITY) {
 514       _mesa_error(ctx, GL_INVALID_OPERATION, "glColorSubTable(format or type)");
 515       return;
 516    }
 517
 518    if (count < 1) {
 519       _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
 520       return;
 521    }
 522
 523    /* error should have been caught sooner */
 524    assert(_mesa_components_in_format(table->_BaseFormat) > 0);
 525
 526    if (start + count > (GLint) table->Size) {
 527       _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
 528       return;
 529    }
 530
 531    if (!table->TableF || !table->TableUB) {
 532       /* a GL_OUT_OF_MEMORY error would have been recorded previously */
 533       return;
 534    }
 535
 536    store_colortable_entries(ctx, table, start, count,
 537                             format, type, data,
 538                             scale[0], bias[0],
 539                             scale[1], bias[1],
 540                             scale[2], bias[2],
 541                             scale[3], bias[3]);
 542
 543    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
 544       /* per-texture object palette */
 545       if (ctx->Driver.UpdateTexturePalette) {
 546          (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 547       }
 548    }
 549
 550    ctx->NewState |= _NEW_PIXEL;
 551 }
 552
 553
 554
 555 void GLAPIENTRY
 556 _mesa_CopyColorTable(GLenum target, GLenum internalformat,
 557                      GLint x, GLint y, GLsizei width)
 558 {
 559    GET_CURRENT_CONTEXT(ctx);
 560    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 561
 562    /* Select buffer to read from */
 563    ctx->Driver.CopyColorTable( ctx, target, internalformat, x, y, width );
 564 }
 565
 566
 567
 568 void GLAPIENTRY
 569 _mesa_CopyColorSubTable(GLenum target, GLsizei start,
 570                         GLint x, GLint y, GLsizei width)
 571 {
 572    GET_CURRENT_CONTEXT(ctx);
 573    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 574
 575    ctx->Driver.CopyColorSubTable( ctx, target, start, x, y, width );
 576 }
 577
 578
 579
 580 void GLAPIENTRY
 581 _mesa_GetColorTable( GLenum target, GLenum format,
 582                      GLenum type, GLvoid *data )
 583 {
 584    GET_CURRENT_CONTEXT(ctx);
 585    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 586    struct gl_color_table *table = NULL;
 587    GLfloat rgba[MAX_COLOR_TABLE_SIZE][4];
 588    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 589
 590    if (ctx->NewState) {
 591       _mesa_update_state(ctx);
 592    }
 593
 594    switch (target) {
 595       case GL_SHARED_TEXTURE_PALETTE_EXT:
 596          table = &ctx->Texture.Palette;
 597          break;
 598       case GL_COLOR_TABLE:
 599          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 600          break;
 601       case GL_TEXTURE_COLOR_TABLE_SGI:
 602          if (!ctx->Extensions.SGI_texture_color_table) {
 603             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 604             return;
 605          }
 606          table = &(texUnit->ColorTable);
 607          break;
 608       case GL_POST_CONVOLUTION_COLOR_TABLE:
 609          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 610          break;
 611       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 612          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 613          break;
 614       default:
 615          /* try texture targets */
 616          {
 617             struct gl_texture_object *texobj
 618                = _mesa_select_tex_object(ctx, texUnit, target);
 619             if (texobj && !_mesa_is_proxy_texture(target)) {
 620                table = &texobj->Palette;
 621             }
 622             else {
 623                _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 624                return;
 625             }
 626          }
 627    }
 628
 629    ASSERT(table);
 630
 631    if (table->Size <= 0) {
 632       return;
 633    }
 634
 635    switch (table->_BaseFormat) {
 636    case GL_ALPHA:
 637       {
 638          GLuint i;
 639          for (i = 0; i < table->Size; i++) {
 640             rgba[i][RCOMP] = 0;
 641             rgba[i][GCOMP] = 0;
 642             rgba[i][BCOMP] = 0;
 643             rgba[i][ACOMP] = table->TableF[i];
 644          }
 645       }
 646       break;
 647    case GL_LUMINANCE:
 648       {
 649          GLuint i;
 650          for (i = 0; i < table->Size; i++) {
 651             rgba[i][RCOMP] =
 652             rgba[i][GCOMP] =
 653             rgba[i][BCOMP] = table->TableF[i];
 654             rgba[i][ACOMP] = 1.0F;
 655          }
 656       }
 657       break;
 658    case GL_LUMINANCE_ALPHA:
 659       {
 660          GLuint i;
 661          for (i = 0; i < table->Size; i++) {
 662             rgba[i][RCOMP] =
 663             rgba[i][GCOMP] =
 664             rgba[i][BCOMP] = table->TableF[i*2+0];
 665             rgba[i][ACOMP] = table->TableF[i*2+1];
 666          }
 667       }
 668       break;
 669    case GL_INTENSITY:
 670       {
 671          GLuint i;
 672          for (i = 0; i < table->Size; i++) {
 673             rgba[i][RCOMP] =
 674             rgba[i][GCOMP] =
 675             rgba[i][BCOMP] =
 676             rgba[i][ACOMP] = table->TableF[i];
 677          }
 678       }
 679       break;
 680    case GL_RGB:
 681       {
 682          GLuint i;
 683          for (i = 0; i < table->Size; i++) {
 684             rgba[i][RCOMP] = table->TableF[i*3+0];
 685             rgba[i][GCOMP] = table->TableF[i*3+1];
 686             rgba[i][BCOMP] = table->TableF[i*3+2];
 687             rgba[i][ACOMP] = 1.0F;
 688          }
 689       }
 690       break;
 691    case GL_RGBA:
 692       _mesa_memcpy(rgba, table->TableF, 4 * table->Size * sizeof(GLfloat));
 693       break;
 694    default:
 695       _mesa_problem(ctx, "bad table format in glGetColorTable");
 696       return;
 697    }
 698
 699    if (ctx->Pack.BufferObj->Name) {
 700       /* pack color table into PBO */
 701       GLubyte *buf;
 702       if (!_mesa_validate_pbo_access(1, &ctx->Pack, table->Size, 1, 1,
 703                                      format, type, data)) {
 704          _mesa_error(ctx, GL_INVALID_OPERATION,
 705                      "glGetColorTable(invalid PBO access)");
 706          return;
 707       }
 708       buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
 709                                               GL_WRITE_ONLY_ARB,
 710                                               ctx->Pack.BufferObj);
 711       if (!buf) {
 712          /* buffer is already mapped - that's an error */
 713          _mesa_error(ctx, GL_INVALID_OPERATION,
 714                      "glGetColorTable(PBO is mapped)");
 715          return;
 716       }
 717       data = ADD_POINTERS(buf, data);
 718    }
 719
 720    _mesa_pack_rgba_span_float(ctx, table->Size, rgba,
 721                               format, type, data, &ctx->Pack, 0x0);
 722
 723    if (ctx->Pack.BufferObj->Name) {
 724       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
 725                               ctx->Pack.BufferObj);
 726    }
 727 }
 728
 729
 730
 731 void GLAPIENTRY
 732 _mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 733 {
 734    GLfloat *scale, *bias;
 735    GET_CURRENT_CONTEXT(ctx);
 736    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 737
 738    switch (target) {
 739    case GL_COLOR_TABLE_SGI:
 740       scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 741       bias  = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 742       break;
 743    case GL_TEXTURE_COLOR_TABLE_SGI:
 744       scale = ctx->Pixel.TextureColorTableScale;
 745       bias  = ctx->Pixel.TextureColorTableBias;
 746       break;
 747    case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 748       scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 749       bias  = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 750       break;
 751    case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 752       scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 753       bias  = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
 754       break;
 755    default:
 756       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameter(target)");
 757       return;
 758    }
 759
 760    if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 761       COPY_4V(scale, params);
 762    }
 763    else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 764       COPY_4V(bias, params);
 765    }
 766    else {
 767       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
 768       return;
 769    }
 770
 771    ctx->NewState |= _NEW_PIXEL;
 772 }
 773
 774
 775
 776 void GLAPIENTRY
 777 _mesa_ColorTableParameteriv(GLenum target, GLenum pname, const GLint *params)
 778 {
 779    GLfloat fparams[4];
 780    if (pname == GL_COLOR_TABLE_SGI ||
 781        pname == GL_TEXTURE_COLOR_TABLE_SGI ||
 782        pname == GL_POST_CONVOLUTION_COLOR_TABLE_SGI ||
 783        pname == GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI) {
 784       /* four values */
 785       fparams[0] = (GLfloat) params[0];
 786       fparams[1] = (GLfloat) params[1];
 787       fparams[2] = (GLfloat) params[2];
 788       fparams[3] = (GLfloat) params[3];
 789    }
 790    else {
 791       /* one values */
 792       fparams[0] = (GLfloat) params[0];
 793    }
 794    _mesa_ColorTableParameterfv(target, pname, fparams);
 795 }
 796
 797
 798
 799 void GLAPIENTRY
 800 _mesa_GetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )
 801 {
 802    GET_CURRENT_CONTEXT(ctx);
 803    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 804    struct gl_color_table *table = NULL;
 805    ASSERT_OUTSIDE_BEGIN_END(ctx);
 806
 807    switch (target) {
 808       case GL_SHARED_TEXTURE_PALETTE_EXT:
 809          table = &ctx->Texture.Palette;
 810          break;
 811       case GL_COLOR_TABLE:
 812          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 813          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 814             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION]);
 815             return;
 816          }
 817          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 818             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION]);
 819             return;
 820          }
 821          break;
 822       case GL_PROXY_COLOR_TABLE:
 823          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
 824          break;
 825       case GL_TEXTURE_COLOR_TABLE_SGI:
 826          if (!ctx->Extensions.SGI_texture_color_table) {
 827             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 828             return;
 829          }
 830          table = &(texUnit->ColorTable);
 831          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 832             COPY_4V(params, ctx->Pixel.TextureColorTableScale);
 833             return;
 834          }
 835          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 836             COPY_4V(params, ctx->Pixel.TextureColorTableBias);
 837             return;
 838          }
 839          break;
 840       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 841          if (!ctx->Extensions.SGI_texture_color_table) {
 842             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 843             return;
 844          }
 845          table = &(texUnit->ProxyColorTable);
 846          break;
 847       case GL_POST_CONVOLUTION_COLOR_TABLE:
 848          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 849          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 850             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION]);
 851             return;
 852          }
 853          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 854             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION]);
 855             return;
 856          }
 857          break;
 858       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
 859          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
 860          break;
 861       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 862          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 863          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 864             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX]);
 865             return;
 866          }
 867          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 868             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX]);
 869             return;
 870          }
 871          break;
 872       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
 873          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
 874          break;
 875       default:
 876          /* try texture targets */
 877          {
 878             struct gl_texture_object *texobj
 879                = _mesa_select_tex_object(ctx, texUnit, target);
 880             if (texobj) {
 881                table = &texobj->Palette;
 882             }
 883             else {
 884                _mesa_error(ctx, GL_INVALID_ENUM,
 885                            "glGetColorTableParameterfv(target)");
 886                return;
 887             }
 888          }
 889    }
 890
 891    assert(table);
 892
 893    switch (pname) {
 894       case GL_COLOR_TABLE_FORMAT:
 895          *params = (GLfloat) table->InternalFormat;
 896          break;
 897       case GL_COLOR_TABLE_WIDTH:
 898          *params = (GLfloat) table->Size;
 899          break;
 900       case GL_COLOR_TABLE_RED_SIZE:
 901          *params = (GLfloat) table->RedSize;
 902          break;
 903       case GL_COLOR_TABLE_GREEN_SIZE:
 904          *params = (GLfloat) table->GreenSize;
 905          break;
 906       case GL_COLOR_TABLE_BLUE_SIZE:
 907          *params = (GLfloat) table->BlueSize;
 908          break;
 909       case GL_COLOR_TABLE_ALPHA_SIZE:
 910          *params = (GLfloat) table->AlphaSize;
 911          break;
 912       case GL_COLOR_TABLE_LUMINANCE_SIZE:
 913          *params = (GLfloat) table->LuminanceSize;
 914          break;
 915       case GL_COLOR_TABLE_INTENSITY_SIZE:
 916          *params = (GLfloat) table->IntensitySize;
 917          break;
 918       default:
 919          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameterfv(pname)" );
 920          return;
 921    }
 922 }
 923
 924
 925
 926 void GLAPIENTRY
 927 _mesa_GetColorTableParameteriv( GLenum target, GLenum pname, GLint *params )
 928 {
 929    GET_CURRENT_CONTEXT(ctx);
 930    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
 931    struct gl_color_table *table = NULL;
 932    ASSERT_OUTSIDE_BEGIN_END(ctx);
 933
 934    switch (target) {
 935       case GL_SHARED_TEXTURE_PALETTE_EXT:
 936          table = &ctx->Texture.Palette;
 937          break;
 938       case GL_COLOR_TABLE:
 939          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 940          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 941             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 942             params[0] = (GLint) scale[0];
 943             params[1] = (GLint) scale[1];
 944             params[2] = (GLint) scale[2];
 945             params[3] = (GLint) scale[3];
 946             return;
 947          }
 948          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 949             GLfloat *bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 950             params[0] = (GLint) bias[0];
 951             params[1] = (GLint) bias[1];
 952             params[2] = (GLint) bias[2];
 953             params[3] = (GLint) bias[3];
 954             return;
 955          }
 956          break;
 957       case GL_PROXY_COLOR_TABLE:
 958          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
 959          break;
 960       case GL_TEXTURE_COLOR_TABLE_SGI:
 961          if (!ctx->Extensions.SGI_texture_color_table) {
 962             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 963             return;
 964          }
 965          table = &(texUnit->ColorTable);
 966          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 967             params[0] = (GLint) ctx->Pixel.TextureColorTableScale[0];
 968             params[1] = (GLint) ctx->Pixel.TextureColorTableScale[1];
 969             params[2] = (GLint) ctx->Pixel.TextureColorTableScale[2];
 970             params[3] = (GLint) ctx->Pixel.TextureColorTableScale[3];
 971             return;
 972          }
 973          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 974             params[0] = (GLint) ctx->Pixel.TextureColorTableBias[0];
 975             params[1] = (GLint) ctx->Pixel.TextureColorTableBias[1];
 976             params[2] = (GLint) ctx->Pixel.TextureColorTableBias[2];
 977             params[3] = (GLint) ctx->Pixel.TextureColorTableBias[3];
 978             return;
 979          }
 980          break;
 981       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 982          if (!ctx->Extensions.SGI_texture_color_table) {
 983             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 984             return;
 985          }
 986          table = &(texUnit->ProxyColorTable);
 987          break;
 988       case GL_POST_CONVOLUTION_COLOR_TABLE:
 989          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 990          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 991             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 992             params[0] = (GLint) scale[0];
 993             params[1] = (GLint) scale[1];
 994             params[2] = (GLint) scale[2];
 995             params[3] = (GLint) scale[3];
 996             return;
 997          }
 998          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 999             GLfloat *bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
1000             params[0] = (GLint) bias[0];
1001             params[1] = (GLint) bias[1];
1002             params[2] = (GLint) bias[2];
1003             params[3] = (GLint) bias[3];
1004             return;
1005          }
1006          break;
1007       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
1008          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
1009          break;
1010       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
1011          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
1012          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
1013             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
1014             params[0] = (GLint) scale[0];
1015             params[0] = (GLint) scale[1];
1016             params[0] = (GLint) scale[2];
1017             params[0] = (GLint) scale[3];
1018             return;
1019          }
1020          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
1021             GLfloat *bias = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
1022             params[0] = (GLint) bias[0];
1023             params[1] = (GLint) bias[1];
1024             params[2] = (GLint) bias[2];
1025             params[3] = (GLint) bias[3];
1026             return;
1027          }
1028          break;
1029       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
1030          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
1031          break;
1032       default:
1033          /* Try texture targets */
1034          {
1035             struct gl_texture_object *texobj
1036                = _mesa_select_tex_object(ctx, texUnit, target);
1037             if (texobj) {
1038                table = &texobj->Palette;
1039             }
1040             else {
1041                _mesa_error(ctx, GL_INVALID_ENUM,
1042                            "glGetColorTableParameteriv(target)");
1043                return;
1044             }
1045          }
1046    }
1047
1048    assert(table);
1049
1050    switch (pname) {
1051       case GL_COLOR_TABLE_FORMAT:
1052          *params = table->InternalFormat;
1053          break;
1054       case GL_COLOR_TABLE_WIDTH:
1055          *params = table->Size;
1056          break;
1057       case GL_COLOR_TABLE_RED_SIZE:
1058          *params = table->RedSize;
1059          break;
1060       case GL_COLOR_TABLE_GREEN_SIZE:
1061          *params = table->GreenSize;
1062          break;
1063       case GL_COLOR_TABLE_BLUE_SIZE:
1064          *params = table->BlueSize;
1065          break;
1066       case GL_COLOR_TABLE_ALPHA_SIZE:
1067          *params = table->AlphaSize;
1068          break;
1069       case GL_COLOR_TABLE_LUMINANCE_SIZE:
1070          *params = table->LuminanceSize;
1071          break;
1072       case GL_COLOR_TABLE_INTENSITY_SIZE:
1073          *params = table->IntensitySize;
1074          break;
1075       default:
1076          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameteriv(pname)" );
1077          return;
1078    }
1079 }
1080
1081 /**********************************************************************/
1082 /*****                      Initialization                        *****/
1083 /**********************************************************************/
1084
1085
1086 void
1087 _mesa_init_colortable( struct gl_color_table *p )
1088 {
1089    p->TableF = NULL;
1090    p->TableUB = NULL;
1091    p->Size = 0;
1092    p->InternalFormat = GL_RGBA;
1093 }
1094
1095
1096
1097 void
1098 _mesa_free_colortable_data( struct gl_color_table *p )
1099 {
1100    if (p->TableF) {
1101       _mesa_free(p->TableF);
1102       p->TableF = NULL;
1103    }
1104    if (p->TableUB) {
1105       _mesa_free(p->TableUB);
1106       p->TableUB = NULL;
1107    }
1108 }
1109
1110
1111 /*
1112  * Initialize all colortables for a context.
1113  */
1114 void
1115 _mesa_init_colortables( GLcontext * ctx )
1116 {
1117    GLuint i;
1118    for (i = 0; i < COLORTABLE_MAX; i++) {
1119       _mesa_init_colortable(&ctx->ColorTable[i]);
1120       _mesa_init_colortable(&ctx->ProxyColorTable[i]);
1121    }
1122 }
1123
1124
1125 /*
1126  * Free all colortable data for a context
1127  */
1128 void
1129 _mesa_free_colortables_data( GLcontext *ctx )
1130 {
1131    GLuint i;
1132    for (i = 0; i < COLORTABLE_MAX; i++) {
1133       _mesa_free_colortable_data(&ctx->ColorTable[i]);
1134       _mesa_free_colortable_data(&ctx->ProxyColorTable[i]);
1135    }
1136 }