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 "mfeatures.h"
  33 #include "mtypes.h"
  34 #include "pack.h"
  35 #include "state.h"
  36 #include "teximage.h"
  37 #include "texstate.h"
  38 #include "main/dispatch.h"
  39
  40
  41 #if FEATURE_colortable
  42
  43
  44 /**
  45  * Given an internalFormat token passed to glColorTable,
  46  * return the corresponding base format.
  47  * Return -1 if invalid token.
  48  */
  49 static GLint
  50 base_colortab_format( GLenum format )
  51 {
  52    switch (format) {
  53       case GL_ALPHA:
  54       case GL_ALPHA4:
  55       case GL_ALPHA8:
  56       case GL_ALPHA12:
  57       case GL_ALPHA16:
  58          return GL_ALPHA;
  59       case GL_LUMINANCE:
  60       case GL_LUMINANCE4:
  61       case GL_LUMINANCE8:
  62       case GL_LUMINANCE12:
  63       case GL_LUMINANCE16:
  64          return GL_LUMINANCE;
  65       case GL_LUMINANCE_ALPHA:
  66       case GL_LUMINANCE4_ALPHA4:
  67       case GL_LUMINANCE6_ALPHA2:
  68       case GL_LUMINANCE8_ALPHA8:
  69       case GL_LUMINANCE12_ALPHA4:
  70       case GL_LUMINANCE12_ALPHA12:
  71       case GL_LUMINANCE16_ALPHA16:
  72          return GL_LUMINANCE_ALPHA;
  73       case GL_INTENSITY:
  74       case GL_INTENSITY4:
  75       case GL_INTENSITY8:
  76       case GL_INTENSITY12:
  77       case GL_INTENSITY16:
  78          return GL_INTENSITY;
  79       case GL_RGB:
  80       case GL_R3_G3_B2:
  81       case GL_RGB4:
  82       case GL_RGB5:
  83       case GL_RGB8:
  84       case GL_RGB10:
  85       case GL_RGB12:
  86       case GL_RGB16:
  87          return GL_RGB;
  88       case GL_RGBA:
  89       case GL_RGBA2:
  90       case GL_RGBA4:
  91       case GL_RGB5_A1:
  92       case GL_RGBA8:
  93       case GL_RGB10_A2:
  94       case GL_RGBA12:
  95       case GL_RGBA16:
  96          return GL_RGBA;
  97       default:
  98          return -1;  /* error */
  99    }
 100 }
 101
 102
 103
 104 /**
 105  * Examine table's format and set the component sizes accordingly.
 106  */
 107 static void
 108 set_component_sizes( struct gl_color_table *table )
 109 {
 110    /* assuming the ubyte table */
 111    const GLubyte sz = 8;
 112
 113    switch (table->_BaseFormat) {
 114       case GL_ALPHA:
 115          table->RedSize = 0;
 116          table->GreenSize = 0;
 117          table->BlueSize = 0;
 118          table->AlphaSize = sz;
 119          table->IntensitySize = 0;
 120          table->LuminanceSize = 0;
 121          break;
 122       case GL_LUMINANCE:
 123          table->RedSize = 0;
 124          table->GreenSize = 0;
 125          table->BlueSize = 0;
 126          table->AlphaSize = 0;
 127          table->IntensitySize = 0;
 128          table->LuminanceSize = sz;
 129          break;
 130       case GL_LUMINANCE_ALPHA:
 131          table->RedSize = 0;
 132          table->GreenSize = 0;
 133          table->BlueSize = 0;
 134          table->AlphaSize = sz;
 135          table->IntensitySize = 0;
 136          table->LuminanceSize = sz;
 137          break;
 138       case GL_INTENSITY:
 139          table->RedSize = 0;
 140          table->GreenSize = 0;
 141          table->BlueSize = 0;
 142          table->AlphaSize = 0;
 143          table->IntensitySize = sz;
 144          table->LuminanceSize = 0;
 145          break;
 146       case GL_RGB:
 147          table->RedSize = sz;
 148          table->GreenSize = sz;
 149          table->BlueSize = sz;
 150          table->AlphaSize = 0;
 151          table->IntensitySize = 0;
 152          table->LuminanceSize = 0;
 153          break;
 154       case GL_RGBA:
 155          table->RedSize = sz;
 156          table->GreenSize = sz;
 157          table->BlueSize = sz;
 158          table->AlphaSize = sz;
 159          table->IntensitySize = 0;
 160          table->LuminanceSize = 0;
 161          break;
 162       default:
 163          _mesa_problem(NULL, "unexpected format in set_component_sizes");
 164    }
 165 }
 166
 167
 168
 169 /**
 170  * Update/replace all or part of a color table.  Helper function
 171  * used by _mesa_ColorTable() and _mesa_ColorSubTable().
 172  * The table->Table buffer should already be allocated.
 173  * \param start first entry to update
 174  * \param count number of entries to update
 175  * \param format format of user-provided table data
 176  * \param type datatype of user-provided table data
 177  * \param data user-provided table data
 178  * \param [rgba]Scale - RGBA scale factors
 179  * \param [rgba]Bias - RGBA bias factors
 180  */
 181 static void
 182 store_colortable_entries(struct gl_context *ctx, struct gl_color_table *table,
 183                          GLsizei start, GLsizei count,
 184                          GLenum format, GLenum type, const GLvoid *data,
 185                          GLfloat rScale, GLfloat rBias,
 186                          GLfloat gScale, GLfloat gBias,
 187                          GLfloat bScale, GLfloat bBias,
 188                          GLfloat aScale, GLfloat aBias)
 189 {
 190    data = _mesa_map_validate_pbo_source(ctx,
 191                                         1, &ctx->Unpack, count, 1, 1,
 192                                         format, type, data,
 193                                         "glColor[Sub]Table");
 194    if (!data)
 195       return;
 196
 197    {
 198       /* convert user-provided data to GLfloat values */
 199       GLfloat tempTab[MAX_COLOR_TABLE_SIZE * 4];
 200       GLfloat *tableF;
 201       GLint i;
 202
 203       _mesa_unpack_color_span_float(ctx,
 204                                     count,         /* number of pixels */
 205                                     table->_BaseFormat, /* dest format */
 206                                     tempTab,       /* dest address */
 207                                     format, type,  /* src format/type */
 208                                     data,          /* src data */
 209                                     &ctx->Unpack,
 210                                     IMAGE_CLAMP_BIT); /* transfer ops */
 211
 212       /* the destination */
 213       tableF = table->TableF;
 214
 215       /* Apply scale & bias & clamp now */
 216       switch (table->_BaseFormat) {
 217          case GL_INTENSITY:
 218             for (i = 0; i < count; i++) {
 219                GLuint j = start + i;
 220                tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
 221             }
 222             break;
 223          case GL_LUMINANCE:
 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_ALPHA:
 230             for (i = 0; i < count; i++) {
 231                GLuint j = start + i;
 232                tableF[j] = CLAMP(tempTab[i] * aScale + aBias, 0.0F, 1.0F);
 233             }
 234             break;
 235          case GL_LUMINANCE_ALPHA:
 236             for (i = 0; i < count; i++) {
 237                GLuint j = start + i;
 238                tableF[j*2+0] = CLAMP(tempTab[i*2+0] * rScale + rBias, 0.0F, 1.0F);
 239                tableF[j*2+1] = CLAMP(tempTab[i*2+1] * aScale + aBias, 0.0F, 1.0F);
 240             }
 241             break;
 242          case GL_RGB:
 243             for (i = 0; i < count; i++) {
 244                GLuint j = start + i;
 245                tableF[j*3+0] = CLAMP(tempTab[i*3+0] * rScale + rBias, 0.0F, 1.0F);
 246                tableF[j*3+1] = CLAMP(tempTab[i*3+1] * gScale + gBias, 0.0F, 1.0F);
 247                tableF[j*3+2] = CLAMP(tempTab[i*3+2] * bScale + bBias, 0.0F, 1.0F);
 248             }
 249             break;
 250          case GL_RGBA:
 251             for (i = 0; i < count; i++) {
 252                GLuint j = start + i;
 253                tableF[j*4+0] = CLAMP(tempTab[i*4+0] * rScale + rBias, 0.0F, 1.0F);
 254                tableF[j*4+1] = CLAMP(tempTab[i*4+1] * gScale + gBias, 0.0F, 1.0F);
 255                tableF[j*4+2] = CLAMP(tempTab[i*4+2] * bScale + bBias, 0.0F, 1.0F);
 256                tableF[j*4+3] = CLAMP(tempTab[i*4+3] * aScale + aBias, 0.0F, 1.0F);
 257             }
 258             break;
 259          default:
 260             _mesa_problem(ctx, "Bad format in store_colortable_entries");
 261             return;
 262          }
 263    }
 264
 265    /* update the ubyte table */
 266    {
 267       const GLint comps = _mesa_components_in_format(table->_BaseFormat);
 268       const GLfloat *tableF = table->TableF + start * comps;
 269       GLubyte *tableUB = table->TableUB + start * comps;
 270       GLint i;
 271       for (i = 0; i < count * comps; i++) {
 272          CLAMPED_FLOAT_TO_UBYTE(tableUB[i], tableF[i]);
 273       }
 274    }
 275
 276    _mesa_unmap_pbo_source(ctx, &ctx->Unpack);
 277 }
 278
 279
 280
 281 void GLAPIENTRY
 282 _mesa_ColorTable( GLenum target, GLenum internalFormat,
 283                   GLsizei width, GLenum format, GLenum type,
 284                   const GLvoid *data )
 285 {
 286    static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
 287    static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
 288    GET_CURRENT_CONTEXT(ctx);
 289    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 290    struct gl_texture_object *texObj = NULL;
 291    struct gl_color_table *table = NULL;
 292    GLboolean proxy = GL_FALSE;
 293    GLint baseFormat;
 294    const GLfloat *scale = one, *bias = zero;
 295    GLint comps;
 296
 297    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */
 298
 299    switch (target) {
 300       case GL_SHARED_TEXTURE_PALETTE_EXT:
 301          table = &ctx->Texture.Palette;
 302          break;
 303       case GL_TEXTURE_COLOR_TABLE_SGI:
 304          if (!ctx->Extensions.SGI_texture_color_table) {
 305             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 306             return;
 307          }
 308          table = &(texUnit->ColorTable);
 309          scale = ctx->Pixel.TextureColorTableScale;
 310          bias = ctx->Pixel.TextureColorTableBias;
 311          break;
 312       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 313          if (!ctx->Extensions.SGI_texture_color_table) {
 314             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 315             return;
 316          }
 317          table = &(texUnit->ProxyColorTable);
 318          proxy = GL_TRUE;
 319          break;
 320       default:
 321          /* try texture targets */
 322          {
 323             struct gl_texture_object *texobj
 324                = _mesa_select_tex_object(ctx, texUnit, target);
 325             if (texobj) {
 326                table = &texobj->Palette;
 327                proxy = _mesa_is_proxy_texture(target);
 328             }
 329             else {
 330                _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 331                return;
 332             }
 333          }
 334    }
 335
 336    assert(table);
 337
 338    if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
 339        format == GL_INTENSITY) {
 340       _mesa_error(ctx, GL_INVALID_OPERATION, "glColorTable(format or type)");
 341       return;
 342    }
 343
 344    baseFormat = base_colortab_format(internalFormat);
 345    if (baseFormat < 0) {
 346       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)");
 347       return;
 348    }
 349
 350    if (width < 0 || (width != 0 && !_mesa_is_pow_two(width))) {
 351       /* error */
 352       if (proxy) {
 353          table->Size = 0;
 354          table->InternalFormat = (GLenum) 0;
 355          table->_BaseFormat = (GLenum) 0;
 356       }
 357       else {
 358          _mesa_error(ctx, GL_INVALID_VALUE, "glColorTable(width=%d)", width);
 359       }
 360       return;
 361    }
 362
 363    if (width > (GLsizei) ctx->Const.MaxColorTableSize) {
 364       if (proxy) {
 365          table->Size = 0;
 366          table->InternalFormat = (GLenum) 0;
 367          table->_BaseFormat = (GLenum) 0;
 368       }
 369       else {
 370          _mesa_error(ctx, GL_TABLE_TOO_LARGE, "glColorTable(width)");
 371       }
 372       return;
 373    }
 374
 375    table->Size = width;
 376    table->InternalFormat = internalFormat;
 377    table->_BaseFormat = (GLenum) baseFormat;
 378
 379    comps = _mesa_components_in_format(table->_BaseFormat);
 380    assert(comps > 0);  /* error should have been caught sooner */
 381
 382    if (!proxy) {
 383       _mesa_free_colortable_data(table);
 384
 385       if (width > 0) {
 386          table->TableF = (GLfloat *) malloc(comps * width * sizeof(GLfloat));
 387          table->TableUB = (GLubyte *) malloc(comps * width * sizeof(GLubyte));
 388
 389          if (!table->TableF || !table->TableUB) {
 390             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorTable");
 391             return;
 392          }
 393
 394          store_colortable_entries(ctx, table,
 395                                   0, width,  /* start, count */
 396                                   format, type, data,
 397                                   scale[0], bias[0],
 398                                   scale[1], bias[1],
 399                                   scale[2], bias[2],
 400                                   scale[3], bias[3]);
 401       }
 402    } /* proxy */
 403
 404    /* do this after the table's Type and Format are set */
 405    set_component_sizes(table);
 406
 407    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
 408       /* texture object palette, texObj==NULL means the shared palette */
 409       if (ctx->Driver.UpdateTexturePalette) {
 410          (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 411       }
 412    }
 413
 414    ctx->NewState |= _NEW_PIXEL;
 415 }
 416
 417
 418
 419 void GLAPIENTRY
 420 _mesa_ColorSubTable( GLenum target, GLsizei start,
 421                      GLsizei count, GLenum format, GLenum type,
 422                      const GLvoid *data )
 423 {
 424    static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
 425    static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
 426    GET_CURRENT_CONTEXT(ctx);
 427    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 428    struct gl_texture_object *texObj = NULL;
 429    struct gl_color_table *table = NULL;
 430    const GLfloat *scale = one, *bias = zero;
 431
 432    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 433
 434    switch (target) {
 435       case GL_SHARED_TEXTURE_PALETTE_EXT:
 436          table = &ctx->Texture.Palette;
 437          break;
 438       case GL_TEXTURE_COLOR_TABLE_SGI:
 439          if (!ctx->Extensions.SGI_texture_color_table) {
 440             _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 441             return;
 442          }
 443          table = &(texUnit->ColorTable);
 444          scale = ctx->Pixel.TextureColorTableScale;
 445          bias = ctx->Pixel.TextureColorTableBias;
 446          break;
 447       default:
 448          /* try texture targets */
 449          texObj = _mesa_select_tex_object(ctx, texUnit, target);
 450          if (texObj && !_mesa_is_proxy_texture(target)) {
 451             table = &texObj->Palette;
 452          }
 453          else {
 454             _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 455             return;
 456          }
 457    }
 458
 459    assert(table);
 460
 461    if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
 462        format == GL_INTENSITY) {
 463       _mesa_error(ctx, GL_INVALID_OPERATION, "glColorSubTable(format or type)");
 464       return;
 465    }
 466
 467    if (count < 1) {
 468       _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
 469       return;
 470    }
 471
 472    /* error should have been caught sooner */
 473    assert(_mesa_components_in_format(table->_BaseFormat) > 0);
 474
 475    if (start + count > (GLint) table->Size) {
 476       _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
 477       return;
 478    }
 479
 480    if (!table->TableF || !table->TableUB) {
 481       /* a GL_OUT_OF_MEMORY error would have been recorded previously */
 482       return;
 483    }
 484
 485    store_colortable_entries(ctx, table, start, count,
 486                             format, type, data,
 487                             scale[0], bias[0],
 488                             scale[1], bias[1],
 489                             scale[2], bias[2],
 490                             scale[3], bias[3]);
 491
 492    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
 493       /* per-texture object palette */
 494       if (ctx->Driver.UpdateTexturePalette) {
 495          (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 496       }
 497    }
 498
 499    ctx->NewState |= _NEW_PIXEL;
 500 }
 501
 502
 503
 504 static void GLAPIENTRY
 505 _mesa_CopyColorTable(GLenum target, GLenum internalformat,
 506                      GLint x, GLint y, GLsizei width)
 507 {
 508    GET_CURRENT_CONTEXT(ctx);
 509    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 510
 511    if (!ctx->ReadBuffer->_ColorReadBuffer) {
 512       return;      /* no readbuffer - OK */
 513    }
 514
 515    ctx->Driver.CopyColorTable( ctx, target, internalformat, x, y, width );
 516 }
 517
 518
 519
 520 static void GLAPIENTRY
 521 _mesa_CopyColorSubTable(GLenum target, GLsizei start,
 522                         GLint x, GLint y, GLsizei width)
 523 {
 524    GET_CURRENT_CONTEXT(ctx);
 525    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 526
 527    if (!ctx->ReadBuffer->_ColorReadBuffer) {
 528       return;      /* no readbuffer - OK */
 529    }
 530
 531    ctx->Driver.CopyColorSubTable( ctx, target, start, x, y, width );
 532 }
 533
 534
 535
 536 static void GLAPIENTRY
 537 _mesa_GetColorTable( GLenum target, GLenum format,
 538                      GLenum type, GLvoid *data )
 539 {
 540    GET_CURRENT_CONTEXT(ctx);
 541    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 542    struct gl_color_table *table = NULL;
 543    GLfloat rgba[MAX_COLOR_TABLE_SIZE][4];
 544    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 545
 546    if (ctx->NewState) {
 547       _mesa_update_state(ctx);
 548    }
 549
 550    switch (target) {
 551       case GL_SHARED_TEXTURE_PALETTE_EXT:
 552          table = &ctx->Texture.Palette;
 553          break;
 554       case GL_TEXTURE_COLOR_TABLE_SGI:
 555          if (!ctx->Extensions.SGI_texture_color_table) {
 556             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 557             return;
 558          }
 559          table = &(texUnit->ColorTable);
 560          break;
 561       default:
 562          /* try texture targets */
 563          {
 564             struct gl_texture_object *texobj
 565                = _mesa_select_tex_object(ctx, texUnit, target);
 566             if (texobj && !_mesa_is_proxy_texture(target)) {
 567                table = &texobj->Palette;
 568             }
 569             else {
 570                _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 571                return;
 572             }
 573          }
 574    }
 575
 576    ASSERT(table);
 577
 578    if (table->Size <= 0) {
 579       return;
 580    }
 581
 582    switch (table->_BaseFormat) {
 583    case GL_ALPHA:
 584       {
 585          GLuint i;
 586          for (i = 0; i < table->Size; i++) {
 587             rgba[i][RCOMP] = 0;
 588             rgba[i][GCOMP] = 0;
 589             rgba[i][BCOMP] = 0;
 590             rgba[i][ACOMP] = table->TableF[i];
 591          }
 592       }
 593       break;
 594    case GL_LUMINANCE:
 595       {
 596          GLuint i;
 597          for (i = 0; i < table->Size; i++) {
 598             rgba[i][RCOMP] =
 599             rgba[i][GCOMP] =
 600             rgba[i][BCOMP] = table->TableF[i];
 601             rgba[i][ACOMP] = 1.0F;
 602          }
 603       }
 604       break;
 605    case GL_LUMINANCE_ALPHA:
 606       {
 607          GLuint i;
 608          for (i = 0; i < table->Size; i++) {
 609             rgba[i][RCOMP] =
 610             rgba[i][GCOMP] =
 611             rgba[i][BCOMP] = table->TableF[i*2+0];
 612             rgba[i][ACOMP] = table->TableF[i*2+1];
 613          }
 614       }
 615       break;
 616    case GL_INTENSITY:
 617       {
 618          GLuint i;
 619          for (i = 0; i < table->Size; i++) {
 620             rgba[i][RCOMP] =
 621             rgba[i][GCOMP] =
 622             rgba[i][BCOMP] =
 623             rgba[i][ACOMP] = table->TableF[i];
 624          }
 625       }
 626       break;
 627    case GL_RGB:
 628       {
 629          GLuint i;
 630          for (i = 0; i < table->Size; i++) {
 631             rgba[i][RCOMP] = table->TableF[i*3+0];
 632             rgba[i][GCOMP] = table->TableF[i*3+1];
 633             rgba[i][BCOMP] = table->TableF[i*3+2];
 634             rgba[i][ACOMP] = 1.0F;
 635          }
 636       }
 637       break;
 638    case GL_RGBA:
 639       memcpy(rgba, table->TableF, 4 * table->Size * sizeof(GLfloat));
 640       break;
 641    default:
 642       _mesa_problem(ctx, "bad table format in glGetColorTable");
 643       return;
 644    }
 645
 646    data = _mesa_map_validate_pbo_dest(ctx,
 647                                       1, &ctx->Pack, table->Size, 1, 1,
 648                                       format, type, data,
 649                                       "glGetColorTable");
 650    if (!data)
 651       return;
 652
 653    _mesa_pack_rgba_span_float(ctx, table->Size, rgba,
 654                               format, type, data, &ctx->Pack, 0x0);
 655
 656    _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
 657 }
 658
 659
 660
 661 static void GLAPIENTRY
 662 _mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 663 {
 664    GLfloat *scale, *bias;
 665    GET_CURRENT_CONTEXT(ctx);
 666    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 667
 668    switch (target) {
 669    case GL_TEXTURE_COLOR_TABLE_SGI:
 670       scale = ctx->Pixel.TextureColorTableScale;
 671       bias  = ctx->Pixel.TextureColorTableBias;
 672       break;
 673    default:
 674       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameter(target)");
 675       return;
 676    }
 677
 678    if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 679       COPY_4V(scale, params);
 680    }
 681    else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 682       COPY_4V(bias, params);
 683    }
 684    else {
 685       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
 686       return;
 687    }
 688
 689    ctx->NewState |= _NEW_PIXEL;
 690 }
 691
 692
 693
 694 static void GLAPIENTRY
 695 _mesa_ColorTableParameteriv(GLenum target, GLenum pname, const GLint *params)
 696 {
 697    GLfloat fparams[4];
 698    if (pname == GL_TEXTURE_COLOR_TABLE_SGI) {
 699       /* four values */
 700       fparams[0] = (GLfloat) params[0];
 701       fparams[1] = (GLfloat) params[1];
 702       fparams[2] = (GLfloat) params[2];
 703       fparams[3] = (GLfloat) params[3];
 704    }
 705    else {
 706       /* one values */
 707       fparams[0] = (GLfloat) params[0];
 708    }
 709    _mesa_ColorTableParameterfv(target, pname, fparams);
 710 }
 711
 712
 713
 714 static void GLAPIENTRY
 715 _mesa_GetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )
 716 {
 717    GET_CURRENT_CONTEXT(ctx);
 718    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 719    struct gl_color_table *table = NULL;
 720    ASSERT_OUTSIDE_BEGIN_END(ctx);
 721
 722    switch (target) {
 723       case GL_SHARED_TEXTURE_PALETTE_EXT:
 724          table = &ctx->Texture.Palette;
 725          break;
 726       case GL_TEXTURE_COLOR_TABLE_SGI:
 727          if (!ctx->Extensions.SGI_texture_color_table) {
 728             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 729             return;
 730          }
 731          table = &(texUnit->ColorTable);
 732          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 733             COPY_4V(params, ctx->Pixel.TextureColorTableScale);
 734             return;
 735          }
 736          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 737             COPY_4V(params, ctx->Pixel.TextureColorTableBias);
 738             return;
 739          }
 740          break;
 741       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 742          if (!ctx->Extensions.SGI_texture_color_table) {
 743             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 744             return;
 745          }
 746          table = &(texUnit->ProxyColorTable);
 747          break;
 748       default:
 749          /* try texture targets */
 750          {
 751             struct gl_texture_object *texobj
 752                = _mesa_select_tex_object(ctx, texUnit, target);
 753             if (texobj) {
 754                table = &texobj->Palette;
 755             }
 756             else {
 757                _mesa_error(ctx, GL_INVALID_ENUM,
 758                            "glGetColorTableParameterfv(target)");
 759                return;
 760             }
 761          }
 762    }
 763
 764    assert(table);
 765
 766    switch (pname) {
 767       case GL_COLOR_TABLE_FORMAT:
 768          *params = (GLfloat) table->InternalFormat;
 769          break;
 770       case GL_COLOR_TABLE_WIDTH:
 771          *params = (GLfloat) table->Size;
 772          break;
 773       case GL_COLOR_TABLE_RED_SIZE:
 774          *params = (GLfloat) table->RedSize;
 775          break;
 776       case GL_COLOR_TABLE_GREEN_SIZE:
 777          *params = (GLfloat) table->GreenSize;
 778          break;
 779       case GL_COLOR_TABLE_BLUE_SIZE:
 780          *params = (GLfloat) table->BlueSize;
 781          break;
 782       case GL_COLOR_TABLE_ALPHA_SIZE:
 783          *params = (GLfloat) table->AlphaSize;
 784          break;
 785       case GL_COLOR_TABLE_LUMINANCE_SIZE:
 786          *params = (GLfloat) table->LuminanceSize;
 787          break;
 788       case GL_COLOR_TABLE_INTENSITY_SIZE:
 789          *params = (GLfloat) table->IntensitySize;
 790          break;
 791       default:
 792          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameterfv(pname)" );
 793          return;
 794    }
 795 }
 796
 797
 798
 799 static void GLAPIENTRY
 800 _mesa_GetColorTableParameteriv( GLenum target, GLenum pname, GLint *params )
 801 {
 802    GET_CURRENT_CONTEXT(ctx);
 803    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 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_TEXTURE_COLOR_TABLE_SGI:
 812          if (!ctx->Extensions.SGI_texture_color_table) {
 813             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 814             return;
 815          }
 816          table = &(texUnit->ColorTable);
 817          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 818             params[0] = (GLint) ctx->Pixel.TextureColorTableScale[0];
 819             params[1] = (GLint) ctx->Pixel.TextureColorTableScale[1];
 820             params[2] = (GLint) ctx->Pixel.TextureColorTableScale[2];
 821             params[3] = (GLint) ctx->Pixel.TextureColorTableScale[3];
 822             return;
 823          }
 824          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 825             params[0] = (GLint) ctx->Pixel.TextureColorTableBias[0];
 826             params[1] = (GLint) ctx->Pixel.TextureColorTableBias[1];
 827             params[2] = (GLint) ctx->Pixel.TextureColorTableBias[2];
 828             params[3] = (GLint) ctx->Pixel.TextureColorTableBias[3];
 829             return;
 830          }
 831          break;
 832       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 833          if (!ctx->Extensions.SGI_texture_color_table) {
 834             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 835             return;
 836          }
 837          table = &(texUnit->ProxyColorTable);
 838          break;
 839       default:
 840          /* Try texture targets */
 841          {
 842             struct gl_texture_object *texobj
 843                = _mesa_select_tex_object(ctx, texUnit, target);
 844             if (texobj) {
 845                table = &texobj->Palette;
 846             }
 847             else {
 848                _mesa_error(ctx, GL_INVALID_ENUM,
 849                            "glGetColorTableParameteriv(target)");
 850                return;
 851             }
 852          }
 853    }
 854
 855    assert(table);
 856
 857    switch (pname) {
 858       case GL_COLOR_TABLE_FORMAT:
 859          *params = table->InternalFormat;
 860          break;
 861       case GL_COLOR_TABLE_WIDTH:
 862          *params = table->Size;
 863          break;
 864       case GL_COLOR_TABLE_RED_SIZE:
 865          *params = table->RedSize;
 866          break;
 867       case GL_COLOR_TABLE_GREEN_SIZE:
 868          *params = table->GreenSize;
 869          break;
 870       case GL_COLOR_TABLE_BLUE_SIZE:
 871          *params = table->BlueSize;
 872          break;
 873       case GL_COLOR_TABLE_ALPHA_SIZE:
 874          *params = table->AlphaSize;
 875          break;
 876       case GL_COLOR_TABLE_LUMINANCE_SIZE:
 877          *params = table->LuminanceSize;
 878          break;
 879       case GL_COLOR_TABLE_INTENSITY_SIZE:
 880          *params = table->IntensitySize;
 881          break;
 882       default:
 883          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameteriv(pname)" );
 884          return;
 885    }
 886 }
 887
 888
 889 void
 890 _mesa_init_colortable_dispatch(struct _glapi_table *disp)
 891 {
 892    SET_ColorSubTable(disp, _mesa_ColorSubTable);
 893    SET_ColorTable(disp, _mesa_ColorTable);
 894    SET_ColorTableParameterfv(disp, _mesa_ColorTableParameterfv);
 895    SET_ColorTableParameteriv(disp, _mesa_ColorTableParameteriv);
 896    SET_CopyColorSubTable(disp, _mesa_CopyColorSubTable);
 897    SET_CopyColorTable(disp, _mesa_CopyColorTable);
 898    SET_GetColorTable(disp, _mesa_GetColorTable);
 899    SET_GetColorTableParameterfv(disp, _mesa_GetColorTableParameterfv);
 900    SET_GetColorTableParameteriv(disp, _mesa_GetColorTableParameteriv);
 901 }
 902
 903
 904 #endif /* FEATURE_colortable */
 905
 906
 907 /**********************************************************************/
 908 /*****                      Initialization                        *****/
 909 /**********************************************************************/
 910
 911
 912 void
 913 _mesa_init_colortable( struct gl_color_table *p )
 914 {
 915    p->TableF = NULL;
 916    p->TableUB = NULL;
 917    p->Size = 0;
 918    p->InternalFormat = GL_RGBA;
 919 }
 920
 921
 922
 923 void
 924 _mesa_free_colortable_data( struct gl_color_table *p )
 925 {
 926    if (p->TableF) {
 927       free(p->TableF);
 928       p->TableF = NULL;
 929    }
 930    if (p->TableUB) {
 931       free(p->TableUB);
 932       p->TableUB = NULL;
 933    }
 934 }