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