src/mesa/main/colortab.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #include "glheader.h"
  27 #include "bufferobj.h"
  28 #include "colortab.h"
  29 #include "context.h"
  30 #include "image.h"
  31 #include "macros.h"
  32 #include "state.h"
  33 #include "teximage.h"
  34 #include "texstate.h"
  35
  36
  37 /**
  38  * Given an internalFormat token passed to glColorTable,
  39  * return the corresponding base format.
  40  * Return -1 if invalid token.
  41  */
  42 static GLint
  43 base_colortab_format( GLenum format )
  44 {
  45    switch (format) {
  46       case GL_ALPHA:
  47       case GL_ALPHA4:
  48       case GL_ALPHA8:
  49       case GL_ALPHA12:
  50       case GL_ALPHA16:
  51          return GL_ALPHA;
  52       case GL_LUMINANCE:
  53       case GL_LUMINANCE4:
  54       case GL_LUMINANCE8:
  55       case GL_LUMINANCE12:
  56       case GL_LUMINANCE16:
  57          return GL_LUMINANCE;
  58       case GL_LUMINANCE_ALPHA:
  59       case GL_LUMINANCE4_ALPHA4:
  60       case GL_LUMINANCE6_ALPHA2:
  61       case GL_LUMINANCE8_ALPHA8:
  62       case GL_LUMINANCE12_ALPHA4:
  63       case GL_LUMINANCE12_ALPHA12:
  64       case GL_LUMINANCE16_ALPHA16:
  65          return GL_LUMINANCE_ALPHA;
  66       case GL_INTENSITY:
  67       case GL_INTENSITY4:
  68       case GL_INTENSITY8:
  69       case GL_INTENSITY12:
  70       case GL_INTENSITY16:
  71          return GL_INTENSITY;
  72       case GL_RGB:
  73       case GL_R3_G3_B2:
  74       case GL_RGB4:
  75       case GL_RGB5:
  76       case GL_RGB8:
  77       case GL_RGB10:
  78       case GL_RGB12:
  79       case GL_RGB16:
  80          return GL_RGB;
  81       case GL_RGBA:
  82       case GL_RGBA2:
  83       case GL_RGBA4:
  84       case GL_RGB5_A1:
  85       case GL_RGBA8:
  86       case GL_RGB10_A2:
  87       case GL_RGBA12:
  88       case GL_RGBA16:
  89          return GL_RGBA;
  90       default:
  91          return -1;  /* error */
  92    }
  93 }
  94
  95
  96
  97 /**
  98  * Examine table's format and set the component sizes accordingly.
  99  */
 100 static void
 101 set_component_sizes( struct gl_color_table *table )
 102 {
 103    /* assuming the ubyte table */
 104    const GLubyte sz = 8;
 105
 106    switch (table->_BaseFormat) {
 107       case GL_ALPHA:
 108          table->RedSize = 0;
 109          table->GreenSize = 0;
 110          table->BlueSize = 0;
 111          table->AlphaSize = sz;
 112          table->IntensitySize = 0;
 113          table->LuminanceSize = 0;
 114          break;
 115       case GL_LUMINANCE:
 116          table->RedSize = 0;
 117          table->GreenSize = 0;
 118          table->BlueSize = 0;
 119          table->AlphaSize = 0;
 120          table->IntensitySize = 0;
 121          table->LuminanceSize = sz;
 122          break;
 123       case GL_LUMINANCE_ALPHA:
 124          table->RedSize = 0;
 125          table->GreenSize = 0;
 126          table->BlueSize = 0;
 127          table->AlphaSize = sz;
 128          table->IntensitySize = 0;
 129          table->LuminanceSize = sz;
 130          break;
 131       case GL_INTENSITY:
 132          table->RedSize = 0;
 133          table->GreenSize = 0;
 134          table->BlueSize = 0;
 135          table->AlphaSize = 0;
 136          table->IntensitySize = sz;
 137          table->LuminanceSize = 0;
 138          break;
 139       case GL_RGB:
 140          table->RedSize = sz;
 141          table->GreenSize = sz;
 142          table->BlueSize = sz;
 143          table->AlphaSize = 0;
 144          table->IntensitySize = 0;
 145          table->LuminanceSize = 0;
 146          break;
 147       case GL_RGBA:
 148          table->RedSize = sz;
 149          table->GreenSize = sz;
 150          table->BlueSize = sz;
 151          table->AlphaSize = sz;
 152          table->IntensitySize = 0;
 153          table->LuminanceSize = 0;
 154          break;
 155       default:
 156          _mesa_problem(NULL, "unexpected format in set_component_sizes");
 157    }
 158 }
 159
 160
 161
 162 /**
 163  * Update/replace all or part of a color table.  Helper function
 164  * used by _mesa_ColorTable() and _mesa_ColorSubTable().
 165  * The table->Table buffer should already be allocated.
 166  * \param start first entry to update
 167  * \param count number of entries to update
 168  * \param format format of user-provided table data
 169  * \param type datatype of user-provided table data
 170  * \param data user-provided table data
 171  * \param [rgba]Scale - RGBA scale factors
 172  * \param [rgba]Bias - RGBA bias factors
 173  */
 174 static void
 175 store_colortable_entries(GLcontext *ctx, struct gl_color_table *table,
 176                          GLsizei start, GLsizei count,
 177                          GLenum format, GLenum type, const GLvoid *data,
 178                          GLfloat rScale, GLfloat rBias,
 179                          GLfloat gScale, GLfloat gBias,
 180                          GLfloat bScale, GLfloat bBias,
 181                          GLfloat aScale, GLfloat aBias)
 182 {
 183    data = _mesa_map_validate_pbo_source(ctx,
 184                                         1, &ctx->Unpack, count, 1, 1,
 185                                         format, type, data,
 186                                         "glColor[Sub]Table");
 187    if (!data)
 188       return;
 189
 190    {
 191       /* convert user-provided data to GLfloat values */
 192       GLfloat tempTab[MAX_COLOR_TABLE_SIZE * 4];
 193       GLfloat *tableF;
 194       GLint i;
 195
 196       _mesa_unpack_color_span_float(ctx,
 197                                     count,         /* number of pixels */
 198                                     table->_BaseFormat, /* dest format */
 199                                     tempTab,       /* dest address */
 200                                     format, type,  /* src format/type */
 201                                     data,          /* src data */
 202                                     &ctx->Unpack,
 203                                     IMAGE_CLAMP_BIT); /* transfer ops */
 204
 205       /* the destination */
 206       tableF = table->TableF;
 207
 208       /* Apply scale & bias & clamp now */
 209       switch (table->_BaseFormat) {
 210          case GL_INTENSITY:
 211             for (i = 0; i < count; i++) {
 212                GLuint j = start + i;
 213                tableF[j] = CLAMP(tempTab[i] * rScale + rBias, 0.0F, 1.0F);
 214             }
 215             break;
 216          case GL_LUMINANCE:
 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_ALPHA:
 223             for (i = 0; i < count; i++) {
 224                GLuint j = start + i;
 225                tableF[j] = CLAMP(tempTab[i] * aScale + aBias, 0.0F, 1.0F);
 226             }
 227             break;
 228          case GL_LUMINANCE_ALPHA:
 229             for (i = 0; i < count; i++) {
 230                GLuint j = start + i;
 231                tableF[j*2+0] = CLAMP(tempTab[i*2+0] * rScale + rBias, 0.0F, 1.0F);
 232                tableF[j*2+1] = CLAMP(tempTab[i*2+1] * aScale + aBias, 0.0F, 1.0F);
 233             }
 234             break;
 235          case GL_RGB:
 236             for (i = 0; i < count; i++) {
 237                GLuint j = start + i;
 238                tableF[j*3+0] = CLAMP(tempTab[i*3+0] * rScale + rBias, 0.0F, 1.0F);
 239                tableF[j*3+1] = CLAMP(tempTab[i*3+1] * gScale + gBias, 0.0F, 1.0F);
 240                tableF[j*3+2] = CLAMP(tempTab[i*3+2] * bScale + bBias, 0.0F, 1.0F);
 241             }
 242             break;
 243          case GL_RGBA:
 244             for (i = 0; i < count; i++) {
 245                GLuint j = start + i;
 246                tableF[j*4+0] = CLAMP(tempTab[i*4+0] * rScale + rBias, 0.0F, 1.0F);
 247                tableF[j*4+1] = CLAMP(tempTab[i*4+1] * gScale + gBias, 0.0F, 1.0F);
 248                tableF[j*4+2] = CLAMP(tempTab[i*4+2] * bScale + bBias, 0.0F, 1.0F);
 249                tableF[j*4+3] = CLAMP(tempTab[i*4+3] * aScale + aBias, 0.0F, 1.0F);
 250             }
 251             break;
 252          default:
 253             _mesa_problem(ctx, "Bad format in store_colortable_entries");
 254             return;
 255          }
 256    }
 257
 258    /* update the ubyte table */
 259    {
 260       const GLint comps = _mesa_components_in_format(table->_BaseFormat);
 261       const GLfloat *tableF = table->TableF + start * comps;
 262       GLubyte *tableUB = table->TableUB + start * comps;
 263       GLint i;
 264       for (i = 0; i < count * comps; i++) {
 265          CLAMPED_FLOAT_TO_UBYTE(tableUB[i], tableF[i]);
 266       }
 267    }
 268
 269    _mesa_unmap_pbo_source(ctx, &ctx->Unpack);
 270 }
 271
 272
 273
 274 void GLAPIENTRY
 275 _mesa_ColorTable( GLenum target, GLenum internalFormat,
 276                   GLsizei width, GLenum format, GLenum type,
 277                   const GLvoid *data )
 278 {
 279    static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
 280    static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
 281    GET_CURRENT_CONTEXT(ctx);
 282    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 283    struct gl_texture_object *texObj = NULL;
 284    struct gl_color_table *table = NULL;
 285    GLboolean proxy = GL_FALSE;
 286    GLint baseFormat;
 287    const GLfloat *scale = one, *bias = zero;
 288    GLint comps;
 289
 290    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */
 291
 292    switch (target) {
 293       case GL_SHARED_TEXTURE_PALETTE_EXT:
 294          table = &ctx->Texture.Palette;
 295          break;
 296       case GL_COLOR_TABLE:
 297          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 298          scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 299          bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 300          break;
 301       case GL_PROXY_COLOR_TABLE:
 302          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
 303          proxy = GL_TRUE;
 304          break;
 305       case GL_TEXTURE_COLOR_TABLE_SGI:
 306          if (!ctx->Extensions.SGI_texture_color_table) {
 307             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 308             return;
 309          }
 310          table = &(texUnit->ColorTable);
 311          scale = ctx->Pixel.TextureColorTableScale;
 312          bias = ctx->Pixel.TextureColorTableBias;
 313          break;
 314       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 315          if (!ctx->Extensions.SGI_texture_color_table) {
 316             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 317             return;
 318          }
 319          table = &(texUnit->ProxyColorTable);
 320          proxy = GL_TRUE;
 321          break;
 322       case GL_POST_CONVOLUTION_COLOR_TABLE:
 323          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 324          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 325          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 326          break;
 327       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
 328          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
 329          proxy = GL_TRUE;
 330          break;
 331       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 332          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 333          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 334          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
 335          break;
 336       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
 337          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
 338          proxy = GL_TRUE;
 339          break;
 340       default:
 341          /* try texture targets */
 342          {
 343             struct gl_texture_object *texobj
 344                = _mesa_select_tex_object(ctx, texUnit, target);
 345             if (texobj) {
 346                table = &texobj->Palette;
 347                proxy = _mesa_is_proxy_texture(target);
 348             }
 349             else {
 350                _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(target)");
 351                return;
 352             }
 353          }
 354    }
 355
 356    assert(table);
 357
 358    if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
 359        format == GL_INTENSITY) {
 360       _mesa_error(ctx, GL_INVALID_OPERATION, "glColorTable(format or type)");
 361       return;
 362    }
 363
 364    baseFormat = base_colortab_format(internalFormat);
 365    if (baseFormat < 0) {
 366       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)");
 367       return;
 368    }
 369
 370    if (width < 0 || (width != 0 && !_mesa_is_pow_two(width))) {
 371       /* error */
 372       if (proxy) {
 373          table->Size = 0;
 374          table->InternalFormat = (GLenum) 0;
 375          table->_BaseFormat = (GLenum) 0;
 376       }
 377       else {
 378          _mesa_error(ctx, GL_INVALID_VALUE, "glColorTable(width=%d)", width);
 379       }
 380       return;
 381    }
 382
 383    if (width > (GLsizei) ctx->Const.MaxColorTableSize) {
 384       if (proxy) {
 385          table->Size = 0;
 386          table->InternalFormat = (GLenum) 0;
 387          table->_BaseFormat = (GLenum) 0;
 388       }
 389       else {
 390          _mesa_error(ctx, GL_TABLE_TOO_LARGE, "glColorTable(width)");
 391       }
 392       return;
 393    }
 394
 395    table->Size = width;
 396    table->InternalFormat = internalFormat;
 397    table->_BaseFormat = (GLenum) baseFormat;
 398
 399    comps = _mesa_components_in_format(table->_BaseFormat);
 400    assert(comps > 0);  /* error should have been caught sooner */
 401
 402    if (!proxy) {
 403       _mesa_free_colortable_data(table);
 404
 405       if (width > 0) {
 406          table->TableF = (GLfloat *) _mesa_malloc(comps * width * sizeof(GLfloat));
 407          table->TableUB = (GLubyte *) _mesa_malloc(comps * width * sizeof(GLubyte));
 408
 409          if (!table->TableF || !table->TableUB) {
 410             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glColorTable");
 411             return;
 412          }
 413
 414          store_colortable_entries(ctx, table,
 415                                   0, width,  /* start, count */
 416                                   format, type, data,
 417                                   scale[0], bias[0],
 418                                   scale[1], bias[1],
 419                                   scale[2], bias[2],
 420                                   scale[3], bias[3]);
 421       }
 422    } /* proxy */
 423
 424    /* do this after the table's Type and Format are set */
 425    set_component_sizes(table);
 426
 427    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
 428       /* texture object palette, texObj==NULL means the shared palette */
 429       if (ctx->Driver.UpdateTexturePalette) {
 430          (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 431       }
 432    }
 433
 434    ctx->NewState |= _NEW_PIXEL;
 435 }
 436
 437
 438
 439 void GLAPIENTRY
 440 _mesa_ColorSubTable( GLenum target, GLsizei start,
 441                      GLsizei count, GLenum format, GLenum type,
 442                      const GLvoid *data )
 443 {
 444    static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
 445    static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
 446    GET_CURRENT_CONTEXT(ctx);
 447    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 448    struct gl_texture_object *texObj = NULL;
 449    struct gl_color_table *table = NULL;
 450    const GLfloat *scale = one, *bias = zero;
 451
 452    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 453
 454    switch (target) {
 455       case GL_SHARED_TEXTURE_PALETTE_EXT:
 456          table = &ctx->Texture.Palette;
 457          break;
 458       case GL_COLOR_TABLE:
 459          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 460          scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 461          bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 462          break;
 463       case GL_TEXTURE_COLOR_TABLE_SGI:
 464          if (!ctx->Extensions.SGI_texture_color_table) {
 465             _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 466             return;
 467          }
 468          table = &(texUnit->ColorTable);
 469          scale = ctx->Pixel.TextureColorTableScale;
 470          bias = ctx->Pixel.TextureColorTableBias;
 471          break;
 472       case GL_POST_CONVOLUTION_COLOR_TABLE:
 473          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 474          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 475          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 476          break;
 477       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 478          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 479          scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 480          bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
 481          break;
 482       default:
 483          /* try texture targets */
 484          texObj = _mesa_select_tex_object(ctx, texUnit, target);
 485          if (texObj && !_mesa_is_proxy_texture(target)) {
 486             table = &texObj->Palette;
 487          }
 488          else {
 489             _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
 490             return;
 491          }
 492    }
 493
 494    assert(table);
 495
 496    if (!_mesa_is_legal_format_and_type(ctx, format, type) ||
 497        format == GL_INTENSITY) {
 498       _mesa_error(ctx, GL_INVALID_OPERATION, "glColorSubTable(format or type)");
 499       return;
 500    }
 501
 502    if (count < 1) {
 503       _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
 504       return;
 505    }
 506
 507    /* error should have been caught sooner */
 508    assert(_mesa_components_in_format(table->_BaseFormat) > 0);
 509
 510    if (start + count > (GLint) table->Size) {
 511       _mesa_error(ctx, GL_INVALID_VALUE, "glColorSubTable(count)");
 512       return;
 513    }
 514
 515    if (!table->TableF || !table->TableUB) {
 516       /* a GL_OUT_OF_MEMORY error would have been recorded previously */
 517       return;
 518    }
 519
 520    store_colortable_entries(ctx, table, start, count,
 521                             format, type, data,
 522                             scale[0], bias[0],
 523                             scale[1], bias[1],
 524                             scale[2], bias[2],
 525                             scale[3], bias[3]);
 526
 527    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
 528       /* per-texture object palette */
 529       if (ctx->Driver.UpdateTexturePalette) {
 530          (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
 531       }
 532    }
 533
 534    ctx->NewState |= _NEW_PIXEL;
 535 }
 536
 537
 538
 539 void GLAPIENTRY
 540 _mesa_CopyColorTable(GLenum target, GLenum internalformat,
 541                      GLint x, GLint y, GLsizei width)
 542 {
 543    GET_CURRENT_CONTEXT(ctx);
 544    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 545
 546    /* Select buffer to read from */
 547    ctx->Driver.CopyColorTable( ctx, target, internalformat, x, y, width );
 548 }
 549
 550
 551
 552 void GLAPIENTRY
 553 _mesa_CopyColorSubTable(GLenum target, GLsizei start,
 554                         GLint x, GLint y, GLsizei width)
 555 {
 556    GET_CURRENT_CONTEXT(ctx);
 557    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 558
 559    ctx->Driver.CopyColorSubTable( ctx, target, start, x, y, width );
 560 }
 561
 562
 563
 564 void GLAPIENTRY
 565 _mesa_GetColorTable( GLenum target, GLenum format,
 566                      GLenum type, GLvoid *data )
 567 {
 568    GET_CURRENT_CONTEXT(ctx);
 569    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 570    struct gl_color_table *table = NULL;
 571    GLfloat rgba[MAX_COLOR_TABLE_SIZE][4];
 572    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 573
 574    if (ctx->NewState) {
 575       _mesa_update_state(ctx);
 576    }
 577
 578    switch (target) {
 579       case GL_SHARED_TEXTURE_PALETTE_EXT:
 580          table = &ctx->Texture.Palette;
 581          break;
 582       case GL_COLOR_TABLE:
 583          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 584          break;
 585       case GL_TEXTURE_COLOR_TABLE_SGI:
 586          if (!ctx->Extensions.SGI_texture_color_table) {
 587             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 588             return;
 589          }
 590          table = &(texUnit->ColorTable);
 591          break;
 592       case GL_POST_CONVOLUTION_COLOR_TABLE:
 593          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 594          break;
 595       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 596          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 597          break;
 598       default:
 599          /* try texture targets */
 600          {
 601             struct gl_texture_object *texobj
 602                = _mesa_select_tex_object(ctx, texUnit, target);
 603             if (texobj && !_mesa_is_proxy_texture(target)) {
 604                table = &texobj->Palette;
 605             }
 606             else {
 607                _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
 608                return;
 609             }
 610          }
 611    }
 612
 613    ASSERT(table);
 614
 615    if (table->Size <= 0) {
 616       return;
 617    }
 618
 619    switch (table->_BaseFormat) {
 620    case GL_ALPHA:
 621       {
 622          GLuint i;
 623          for (i = 0; i < table->Size; i++) {
 624             rgba[i][RCOMP] = 0;
 625             rgba[i][GCOMP] = 0;
 626             rgba[i][BCOMP] = 0;
 627             rgba[i][ACOMP] = table->TableF[i];
 628          }
 629       }
 630       break;
 631    case GL_LUMINANCE:
 632       {
 633          GLuint i;
 634          for (i = 0; i < table->Size; i++) {
 635             rgba[i][RCOMP] =
 636             rgba[i][GCOMP] =
 637             rgba[i][BCOMP] = table->TableF[i];
 638             rgba[i][ACOMP] = 1.0F;
 639          }
 640       }
 641       break;
 642    case GL_LUMINANCE_ALPHA:
 643       {
 644          GLuint i;
 645          for (i = 0; i < table->Size; i++) {
 646             rgba[i][RCOMP] =
 647             rgba[i][GCOMP] =
 648             rgba[i][BCOMP] = table->TableF[i*2+0];
 649             rgba[i][ACOMP] = table->TableF[i*2+1];
 650          }
 651       }
 652       break;
 653    case GL_INTENSITY:
 654       {
 655          GLuint i;
 656          for (i = 0; i < table->Size; i++) {
 657             rgba[i][RCOMP] =
 658             rgba[i][GCOMP] =
 659             rgba[i][BCOMP] =
 660             rgba[i][ACOMP] = table->TableF[i];
 661          }
 662       }
 663       break;
 664    case GL_RGB:
 665       {
 666          GLuint i;
 667          for (i = 0; i < table->Size; i++) {
 668             rgba[i][RCOMP] = table->TableF[i*3+0];
 669             rgba[i][GCOMP] = table->TableF[i*3+1];
 670             rgba[i][BCOMP] = table->TableF[i*3+2];
 671             rgba[i][ACOMP] = 1.0F;
 672          }
 673       }
 674       break;
 675    case GL_RGBA:
 676       _mesa_memcpy(rgba, table->TableF, 4 * table->Size * sizeof(GLfloat));
 677       break;
 678    default:
 679       _mesa_problem(ctx, "bad table format in glGetColorTable");
 680       return;
 681    }
 682
 683    data = _mesa_map_validate_pbo_dest(ctx,
 684                                       1, &ctx->Pack, table->Size, 1, 1,
 685                                       format, type, data,
 686                                       "glGetColorTable");
 687    if (!data)
 688       return;
 689
 690    _mesa_pack_rgba_span_float(ctx, table->Size, rgba,
 691                               format, type, data, &ctx->Pack, 0x0);
 692
 693    _mesa_unmap_pbo_dest(ctx, &ctx->Pack);
 694 }
 695
 696
 697
 698 void GLAPIENTRY
 699 _mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
 700 {
 701    GLfloat *scale, *bias;
 702    GET_CURRENT_CONTEXT(ctx);
 703    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 704
 705    switch (target) {
 706    case GL_COLOR_TABLE_SGI:
 707       scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 708       bias  = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 709       break;
 710    case GL_TEXTURE_COLOR_TABLE_SGI:
 711       scale = ctx->Pixel.TextureColorTableScale;
 712       bias  = ctx->Pixel.TextureColorTableBias;
 713       break;
 714    case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
 715       scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 716       bias  = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 717       break;
 718    case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
 719       scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 720       bias  = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
 721       break;
 722    default:
 723       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameter(target)");
 724       return;
 725    }
 726
 727    if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 728       COPY_4V(scale, params);
 729    }
 730    else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 731       COPY_4V(bias, params);
 732    }
 733    else {
 734       _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
 735       return;
 736    }
 737
 738    ctx->NewState |= _NEW_PIXEL;
 739 }
 740
 741
 742
 743 void GLAPIENTRY
 744 _mesa_ColorTableParameteriv(GLenum target, GLenum pname, const GLint *params)
 745 {
 746    GLfloat fparams[4];
 747    if (pname == GL_COLOR_TABLE_SGI ||
 748        pname == GL_TEXTURE_COLOR_TABLE_SGI ||
 749        pname == GL_POST_CONVOLUTION_COLOR_TABLE_SGI ||
 750        pname == GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI) {
 751       /* four values */
 752       fparams[0] = (GLfloat) params[0];
 753       fparams[1] = (GLfloat) params[1];
 754       fparams[2] = (GLfloat) params[2];
 755       fparams[3] = (GLfloat) params[3];
 756    }
 757    else {
 758       /* one values */
 759       fparams[0] = (GLfloat) params[0];
 760    }
 761    _mesa_ColorTableParameterfv(target, pname, fparams);
 762 }
 763
 764
 765
 766 void GLAPIENTRY
 767 _mesa_GetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )
 768 {
 769    GET_CURRENT_CONTEXT(ctx);
 770    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 771    struct gl_color_table *table = NULL;
 772    ASSERT_OUTSIDE_BEGIN_END(ctx);
 773
 774    switch (target) {
 775       case GL_SHARED_TEXTURE_PALETTE_EXT:
 776          table = &ctx->Texture.Palette;
 777          break;
 778       case GL_COLOR_TABLE:
 779          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 780          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 781             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION]);
 782             return;
 783          }
 784          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 785             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION]);
 786             return;
 787          }
 788          break;
 789       case GL_PROXY_COLOR_TABLE:
 790          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
 791          break;
 792       case GL_TEXTURE_COLOR_TABLE_SGI:
 793          if (!ctx->Extensions.SGI_texture_color_table) {
 794             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 795             return;
 796          }
 797          table = &(texUnit->ColorTable);
 798          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 799             COPY_4V(params, ctx->Pixel.TextureColorTableScale);
 800             return;
 801          }
 802          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 803             COPY_4V(params, ctx->Pixel.TextureColorTableBias);
 804             return;
 805          }
 806          break;
 807       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 808          if (!ctx->Extensions.SGI_texture_color_table) {
 809             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 810             return;
 811          }
 812          table = &(texUnit->ProxyColorTable);
 813          break;
 814       case GL_POST_CONVOLUTION_COLOR_TABLE:
 815          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 816          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 817             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION]);
 818             return;
 819          }
 820          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 821             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION]);
 822             return;
 823          }
 824          break;
 825       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
 826          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
 827          break;
 828       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 829          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 830          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 831             COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX]);
 832             return;
 833          }
 834          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 835             COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX]);
 836             return;
 837          }
 838          break;
 839       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
 840          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
 841          break;
 842       default:
 843          /* try texture targets */
 844          {
 845             struct gl_texture_object *texobj
 846                = _mesa_select_tex_object(ctx, texUnit, target);
 847             if (texobj) {
 848                table = &texobj->Palette;
 849             }
 850             else {
 851                _mesa_error(ctx, GL_INVALID_ENUM,
 852                            "glGetColorTableParameterfv(target)");
 853                return;
 854             }
 855          }
 856    }
 857
 858    assert(table);
 859
 860    switch (pname) {
 861       case GL_COLOR_TABLE_FORMAT:
 862          *params = (GLfloat) table->InternalFormat;
 863          break;
 864       case GL_COLOR_TABLE_WIDTH:
 865          *params = (GLfloat) table->Size;
 866          break;
 867       case GL_COLOR_TABLE_RED_SIZE:
 868          *params = (GLfloat) table->RedSize;
 869          break;
 870       case GL_COLOR_TABLE_GREEN_SIZE:
 871          *params = (GLfloat) table->GreenSize;
 872          break;
 873       case GL_COLOR_TABLE_BLUE_SIZE:
 874          *params = (GLfloat) table->BlueSize;
 875          break;
 876       case GL_COLOR_TABLE_ALPHA_SIZE:
 877          *params = (GLfloat) table->AlphaSize;
 878          break;
 879       case GL_COLOR_TABLE_LUMINANCE_SIZE:
 880          *params = (GLfloat) table->LuminanceSize;
 881          break;
 882       case GL_COLOR_TABLE_INTENSITY_SIZE:
 883          *params = (GLfloat) table->IntensitySize;
 884          break;
 885       default:
 886          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameterfv(pname)" );
 887          return;
 888    }
 889 }
 890
 891
 892
 893 void GLAPIENTRY
 894 _mesa_GetColorTableParameteriv( GLenum target, GLenum pname, GLint *params )
 895 {
 896    GET_CURRENT_CONTEXT(ctx);
 897    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 898    struct gl_color_table *table = NULL;
 899    ASSERT_OUTSIDE_BEGIN_END(ctx);
 900
 901    switch (target) {
 902       case GL_SHARED_TEXTURE_PALETTE_EXT:
 903          table = &ctx->Texture.Palette;
 904          break;
 905       case GL_COLOR_TABLE:
 906          table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
 907          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 908             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
 909             params[0] = (GLint) scale[0];
 910             params[1] = (GLint) scale[1];
 911             params[2] = (GLint) scale[2];
 912             params[3] = (GLint) scale[3];
 913             return;
 914          }
 915          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 916             GLfloat *bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
 917             params[0] = (GLint) bias[0];
 918             params[1] = (GLint) bias[1];
 919             params[2] = (GLint) bias[2];
 920             params[3] = (GLint) bias[3];
 921             return;
 922          }
 923          break;
 924       case GL_PROXY_COLOR_TABLE:
 925          table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
 926          break;
 927       case GL_TEXTURE_COLOR_TABLE_SGI:
 928          if (!ctx->Extensions.SGI_texture_color_table) {
 929             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 930             return;
 931          }
 932          table = &(texUnit->ColorTable);
 933          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 934             params[0] = (GLint) ctx->Pixel.TextureColorTableScale[0];
 935             params[1] = (GLint) ctx->Pixel.TextureColorTableScale[1];
 936             params[2] = (GLint) ctx->Pixel.TextureColorTableScale[2];
 937             params[3] = (GLint) ctx->Pixel.TextureColorTableScale[3];
 938             return;
 939          }
 940          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 941             params[0] = (GLint) ctx->Pixel.TextureColorTableBias[0];
 942             params[1] = (GLint) ctx->Pixel.TextureColorTableBias[1];
 943             params[2] = (GLint) ctx->Pixel.TextureColorTableBias[2];
 944             params[3] = (GLint) ctx->Pixel.TextureColorTableBias[3];
 945             return;
 946          }
 947          break;
 948       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
 949          if (!ctx->Extensions.SGI_texture_color_table) {
 950             _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
 951             return;
 952          }
 953          table = &(texUnit->ProxyColorTable);
 954          break;
 955       case GL_POST_CONVOLUTION_COLOR_TABLE:
 956          table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
 957          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 958             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
 959             params[0] = (GLint) scale[0];
 960             params[1] = (GLint) scale[1];
 961             params[2] = (GLint) scale[2];
 962             params[3] = (GLint) scale[3];
 963             return;
 964          }
 965          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 966             GLfloat *bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
 967             params[0] = (GLint) bias[0];
 968             params[1] = (GLint) bias[1];
 969             params[2] = (GLint) bias[2];
 970             params[3] = (GLint) bias[3];
 971             return;
 972          }
 973          break;
 974       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
 975          table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
 976          break;
 977       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
 978          table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
 979          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
 980             GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 981             params[0] = (GLint) scale[0];
 982             params[0] = (GLint) scale[1];
 983             params[0] = (GLint) scale[2];
 984             params[0] = (GLint) scale[3];
 985             return;
 986          }
 987          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
 988             GLfloat *bias = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
 989             params[0] = (GLint) bias[0];
 990             params[1] = (GLint) bias[1];
 991             params[2] = (GLint) bias[2];
 992             params[3] = (GLint) bias[3];
 993             return;
 994          }
 995          break;
 996       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
 997          table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
 998          break;
 999       default:
1000          /* Try texture targets */
1001          {
1002             struct gl_texture_object *texobj
1003                = _mesa_select_tex_object(ctx, texUnit, target);
1004             if (texobj) {
1005                table = &texobj->Palette;
1006             }
1007             else {
1008                _mesa_error(ctx, GL_INVALID_ENUM,
1009                            "glGetColorTableParameteriv(target)");
1010                return;
1011             }
1012          }
1013    }
1014
1015    assert(table);
1016
1017    switch (pname) {
1018       case GL_COLOR_TABLE_FORMAT:
1019          *params = table->InternalFormat;
1020          break;
1021       case GL_COLOR_TABLE_WIDTH:
1022          *params = table->Size;
1023          break;
1024       case GL_COLOR_TABLE_RED_SIZE:
1025          *params = table->RedSize;
1026          break;
1027       case GL_COLOR_TABLE_GREEN_SIZE:
1028          *params = table->GreenSize;
1029          break;
1030       case GL_COLOR_TABLE_BLUE_SIZE:
1031          *params = table->BlueSize;
1032          break;
1033       case GL_COLOR_TABLE_ALPHA_SIZE:
1034          *params = table->AlphaSize;
1035          break;
1036       case GL_COLOR_TABLE_LUMINANCE_SIZE:
1037          *params = table->LuminanceSize;
1038          break;
1039       case GL_COLOR_TABLE_INTENSITY_SIZE:
1040          *params = table->IntensitySize;
1041          break;
1042       default:
1043          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameteriv(pname)" );
1044          return;
1045    }
1046 }
1047
1048 /**********************************************************************/
1049 /*****                      Initialization                        *****/
1050 /**********************************************************************/
1051
1052
1053 void
1054 _mesa_init_colortable( struct gl_color_table *p )
1055 {
1056    p->TableF = NULL;
1057    p->TableUB = NULL;
1058    p->Size = 0;
1059    p->InternalFormat = GL_RGBA;
1060 }
1061
1062
1063
1064 void
1065 _mesa_free_colortable_data( struct gl_color_table *p )
1066 {
1067    if (p->TableF) {
1068       _mesa_free(p->TableF);
1069       p->TableF = NULL;
1070    }
1071    if (p->TableUB) {
1072       _mesa_free(p->TableUB);
1073       p->TableUB = NULL;
1074    }
1075 }
1076
1077
1078 /*
1079  * Initialize all colortables for a context.
1080  */
1081 void
1082 _mesa_init_colortables( GLcontext * ctx )
1083 {
1084    GLuint i;
1085    for (i = 0; i < COLORTABLE_MAX; i++) {
1086       _mesa_init_colortable(&ctx->ColorTable[i]);
1087       _mesa_init_colortable(&ctx->ProxyColorTable[i]);
1088    }
1089 }
1090
1091
1092 /*
1093  * Free all colortable data for a context
1094  */
1095 void
1096 _mesa_free_colortables_data( GLcontext *ctx )
1097 {
1098    GLuint i;
1099    for (i = 0; i < COLORTABLE_MAX; i++) {
1100       _mesa_free_colortable_data(&ctx->ColorTable[i]);
1101       _mesa_free_colortable_data(&ctx->ProxyColorTable[i]);
1102    }
1103 }