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