src/mesa/main/colortab.c

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