src/mesa/main/texstore.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (c) 2008-2009  VMware, Inc.
   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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /*
  27  * Authors:
  28  *   Brian Paul
  29  */
  30
  31 /**
  32  * The GL texture image functions in teximage.c basically just do
  33  * error checking and data structure allocation.  They in turn call
  34  * device driver functions which actually copy/convert/store the user's
  35  * texture image data.
  36  *
  37  * However, most device drivers will be able to use the fallback functions
  38  * in this file.  That is, most drivers will have the following bit of
  39  * code:
  40  *   ctx->Driver.TexImage = _mesa_store_teximage;
  41  *   ctx->Driver.TexSubImage = _mesa_store_texsubimage;
  42  *   etc...
  43  *
  44  * Texture image processing is actually kind of complicated.  We have to do:
  45  *    Format/type conversions
  46  *    pixel unpacking
  47  *    pixel transfer (scale, bais, lookup, etc)
  48  *
  49  * These functions can handle most everything, including processing full
  50  * images and sub-images.
  51  */
  52
  53
  54 #include "errors.h"
  55 #include "glheader.h"
  56 #include "bufferobj.h"
  57 #include "format_pack.h"
  58 #include "format_utils.h"
  59 #include "image.h"
  60 #include "macros.h"
  61 #include "mipmap.h"
  62 #include "mtypes.h"
  63 #include "pack.h"
  64 #include "pbo.h"
  65 #include "imports.h"
  66 #include "texcompress.h"
  67 #include "texcompress_fxt1.h"
  68 #include "texcompress_rgtc.h"
  69 #include "texcompress_s3tc.h"
  70 #include "texcompress_etc.h"
  71 #include "texcompress_bptc.h"
  72 #include "teximage.h"
  73 #include "texstore.h"
  74 #include "enums.h"
  75 #include "glformats.h"
  76 #include "pixeltransfer.h"
  77 #include "util/format_rgb9e5.h"
  78 #include "util/format_r11g11b10f.h"
  79
  80
  81 enum {
  82    ZERO = 4,
  83    ONE = 5
  84 };
  85
  86
  87 /**
  88  * Texture image storage function.
  89  */
  90 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
  91
  92
  93 /**
  94  * Teximage storage routine for when a simple memcpy will do.
  95  * No pixel transfer operations or special texel encodings allowed.
  96  * 1D, 2D and 3D images supported.
  97  */
  98 void
  99 _mesa_memcpy_texture(struct gl_context *ctx,
 100                      GLuint dimensions,
 101                      mesa_format dstFormat,
 102                      GLint dstRowStride,
 103                      GLubyte **dstSlices,
 104                      GLint srcWidth, GLint srcHeight, GLint srcDepth,
 105                      GLenum srcFormat, GLenum srcType,
 106                      const GLvoid *srcAddr,
 107                      const struct gl_pixelstore_attrib *srcPacking)
 108 {
 109    const GLint srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth,
 110                                                      srcFormat, srcType);
 111    const GLint srcImageStride = _mesa_image_image_stride(srcPacking,
 112                                       srcWidth, srcHeight, srcFormat, srcType);
 113    const GLubyte *srcImage = (const GLubyte *) _mesa_image_address(dimensions,
 114         srcPacking, srcAddr, srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
 115    const GLuint texelBytes = _mesa_get_format_bytes(dstFormat);
 116    const GLint bytesPerRow = srcWidth * texelBytes;
 117
 118    if (dstRowStride == srcRowStride &&
 119        dstRowStride == bytesPerRow) {
 120       /* memcpy image by image */
 121       GLint img;
 122       for (img = 0; img < srcDepth; img++) {
 123          GLubyte *dstImage = dstSlices[img];
 124          memcpy(dstImage, srcImage, bytesPerRow * srcHeight);
 125          srcImage += srcImageStride;
 126       }
 127    }
 128    else {
 129       /* memcpy row by row */
 130       GLint img, row;
 131       for (img = 0; img < srcDepth; img++) {
 132          const GLubyte *srcRow = srcImage;
 133          GLubyte *dstRow = dstSlices[img];
 134          for (row = 0; row < srcHeight; row++) {
 135             memcpy(dstRow, srcRow, bytesPerRow);
 136             dstRow += dstRowStride;
 137             srcRow += srcRowStride;
 138          }
 139          srcImage += srcImageStride;
 140       }
 141    }
 142 }
 143
 144
 145 /**
 146  * Store a 32-bit integer or float depth component texture image.
 147  */
 148 static GLboolean
 149 _mesa_texstore_z32(TEXSTORE_PARAMS)
 150 {
 151    const GLuint depthScale = 0xffffffff;
 152    GLenum dstType;
 153    (void) dims;
 154    assert(dstFormat == MESA_FORMAT_Z_UNORM32 ||
 155           dstFormat == MESA_FORMAT_Z_FLOAT32);
 156    assert(_mesa_get_format_bytes(dstFormat) == sizeof(GLuint));
 157
 158    if (dstFormat == MESA_FORMAT_Z_UNORM32)
 159       dstType = GL_UNSIGNED_INT;
 160    else
 161       dstType = GL_FLOAT;
 162
 163    {
 164       /* general path */
 165       GLint img, row;
 166       for (img = 0; img < srcDepth; img++) {
 167          GLubyte *dstRow = dstSlices[img];
 168          for (row = 0; row < srcHeight; row++) {
 169             const GLvoid *src = _mesa_image_address(dims, srcPacking,
 170                 srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
 171             _mesa_unpack_depth_span(ctx, srcWidth,
 172                                     dstType, dstRow,
 173                                     depthScale, srcType, src, srcPacking);
 174             dstRow += dstRowStride;
 175          }
 176       }
 177    }
 178    return GL_TRUE;
 179 }
 180
 181
 182 /**
 183  * Store a 24-bit integer depth component texture image.
 184  */
 185 static GLboolean
 186 _mesa_texstore_x8_z24(TEXSTORE_PARAMS)
 187 {
 188    const GLuint depthScale = 0xffffff;
 189
 190    (void) dims;
 191    assert(dstFormat == MESA_FORMAT_Z24_UNORM_X8_UINT);
 192
 193    {
 194       /* general path */
 195       GLint img, row;
 196       for (img = 0; img < srcDepth; img++) {
 197          GLubyte *dstRow = dstSlices[img];
 198          for (row = 0; row < srcHeight; row++) {
 199             const GLvoid *src = _mesa_image_address(dims, srcPacking,
 200                 srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
 201             _mesa_unpack_depth_span(ctx, srcWidth,
 202                                     GL_UNSIGNED_INT, (GLuint *) dstRow,
 203                                     depthScale, srcType, src, srcPacking);
 204             dstRow += dstRowStride;
 205          }
 206       }
 207    }
 208    return GL_TRUE;
 209 }
 210
 211
 212 /**
 213  * Store a 24-bit integer depth component texture image.
 214  */
 215 static GLboolean
 216 _mesa_texstore_z24_x8(TEXSTORE_PARAMS)
 217 {
 218    const GLuint depthScale = 0xffffff;
 219
 220    (void) dims;
 221    assert(dstFormat == MESA_FORMAT_X8_UINT_Z24_UNORM);
 222
 223    {
 224       /* general path */
 225       GLint img, row;
 226       for (img = 0; img < srcDepth; img++) {
 227          GLubyte *dstRow = dstSlices[img];
 228          for (row = 0; row < srcHeight; row++) {
 229             const GLvoid *src = _mesa_image_address(dims, srcPacking,
 230                 srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
 231             GLuint *dst = (GLuint *) dstRow;
 232             GLint i;
 233             _mesa_unpack_depth_span(ctx, srcWidth,
 234                                     GL_UNSIGNED_INT, dst,
 235                                     depthScale, srcType, src, srcPacking);
 236             for (i = 0; i < srcWidth; i++)
 237                dst[i] <<= 8;
 238             dstRow += dstRowStride;
 239          }
 240       }
 241    }
 242    return GL_TRUE;
 243 }
 244
 245
 246 /**
 247  * Store a 16-bit integer depth component texture image.
 248  */
 249 static GLboolean
 250 _mesa_texstore_z16(TEXSTORE_PARAMS)
 251 {
 252    const GLuint depthScale = 0xffff;
 253    (void) dims;
 254    assert(dstFormat == MESA_FORMAT_Z_UNORM16);
 255    assert(_mesa_get_format_bytes(dstFormat) == sizeof(GLushort));
 256
 257    {
 258       /* general path */
 259       GLint img, row;
 260       for (img = 0; img < srcDepth; img++) {
 261          GLubyte *dstRow = dstSlices[img];
 262          for (row = 0; row < srcHeight; row++) {
 263             const GLvoid *src = _mesa_image_address(dims, srcPacking,
 264                 srcAddr, srcWidth, srcHeight, srcFormat, srcType, img, row, 0);
 265             GLushort *dst16 = (GLushort *) dstRow;
 266             _mesa_unpack_depth_span(ctx, srcWidth,
 267                                     GL_UNSIGNED_SHORT, dst16, depthScale,
 268                                     srcType, src, srcPacking);
 269             dstRow += dstRowStride;
 270          }
 271       }
 272    }
 273    return GL_TRUE;
 274 }
 275
 276
 277 /**
 278  * Texstore for _mesa_texformat_ycbcr or _mesa_texformat_ycbcr_REV.
 279  */
 280 static GLboolean
 281 _mesa_texstore_ycbcr(TEXSTORE_PARAMS)
 282 {
 283    const GLboolean littleEndian = _mesa_little_endian();
 284
 285    (void) ctx; (void) dims; (void) baseInternalFormat;
 286
 287    assert((dstFormat == MESA_FORMAT_YCBCR) ||
 288           (dstFormat == MESA_FORMAT_YCBCR_REV));
 289    assert(_mesa_get_format_bytes(dstFormat) == 2);
 290    assert(ctx->Extensions.MESA_ycbcr_texture);
 291    assert(srcFormat == GL_YCBCR_MESA);
 292    assert((srcType == GL_UNSIGNED_SHORT_8_8_MESA) ||
 293           (srcType == GL_UNSIGNED_SHORT_8_8_REV_MESA));
 294    assert(baseInternalFormat == GL_YCBCR_MESA);
 295
 296    /* always just memcpy since no pixel transfer ops apply */
 297    _mesa_memcpy_texture(ctx, dims,
 298                         dstFormat,
 299                         dstRowStride, dstSlices,
 300                         srcWidth, srcHeight, srcDepth, srcFormat, srcType,
 301                         srcAddr, srcPacking);
 302
 303    /* Check if we need byte swapping */
 304    /* XXX the logic here _might_ be wrong */
 305    if (srcPacking->SwapBytes ^
 306        (srcType == GL_UNSIGNED_SHORT_8_8_REV_MESA) ^
 307        (dstFormat == MESA_FORMAT_YCBCR_REV) ^
 308        !littleEndian) {
 309       GLint img, row;
 310       for (img = 0; img < srcDepth; img++) {
 311          GLubyte *dstRow = dstSlices[img];
 312          for (row = 0; row < srcHeight; row++) {
 313             _mesa_swap2((GLushort *) dstRow, srcWidth);
 314             dstRow += dstRowStride;
 315          }
 316       }
 317    }
 318    return GL_TRUE;
 319 }
 320
 321
 322 /**
 323  * Store a combined depth/stencil texture image.
 324  */
 325 static GLboolean
 326 _mesa_texstore_z24_s8(TEXSTORE_PARAMS)
 327 {
 328    const GLuint depthScale = 0xffffff;
 329    const GLint srcRowStride
 330       = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType);
 331    GLint img, row;
 332    GLuint *depth = malloc(srcWidth * sizeof(GLuint));
 333    GLubyte *stencil = malloc(srcWidth * sizeof(GLubyte));
 334
 335    assert(dstFormat == MESA_FORMAT_S8_UINT_Z24_UNORM);
 336    assert(srcFormat == GL_DEPTH_STENCIL_EXT ||
 337           srcFormat == GL_DEPTH_COMPONENT ||
 338           srcFormat == GL_STENCIL_INDEX);
 339    assert(srcFormat != GL_DEPTH_STENCIL_EXT ||
 340           srcType == GL_UNSIGNED_INT_24_8_EXT ||
 341           srcType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
 342
 343    if (!depth || !stencil) {
 344       free(depth);
 345       free(stencil);
 346       return GL_FALSE;
 347    }
 348
 349    /* In case we only upload depth we need to preserve the stencil */
 350    for (img = 0; img < srcDepth; img++) {
 351       GLuint *dstRow = (GLuint *) dstSlices[img];
 352       const GLubyte *src
 353          = (const GLubyte *) _mesa_image_address(dims, srcPacking, srcAddr,
 354                srcWidth, srcHeight,
 355                srcFormat, srcType,
 356                img, 0, 0);
 357       for (row = 0; row < srcHeight; row++) {
 358          GLint i;
 359          GLboolean keepdepth = GL_FALSE, keepstencil = GL_FALSE;
 360
 361          if (srcFormat == GL_DEPTH_COMPONENT) { /* preserve stencil */
 362             keepstencil = GL_TRUE;
 363          }
 364          else if (srcFormat == GL_STENCIL_INDEX) { /* preserve depth */
 365             keepdepth = GL_TRUE;
 366          }
 367
 368          if (keepdepth == GL_FALSE)
 369             /* the 24 depth bits will be in the low position: */
 370             _mesa_unpack_depth_span(ctx, srcWidth,
 371                                     GL_UNSIGNED_INT, /* dst type */
 372                                     keepstencil ? depth : dstRow, /* dst addr */
 373                                     depthScale,
 374                                     srcType, src, srcPacking);
 375
 376          if (keepstencil == GL_FALSE)
 377             /* get the 8-bit stencil values */
 378             _mesa_unpack_stencil_span(ctx, srcWidth,
 379                                       GL_UNSIGNED_BYTE, /* dst type */
 380                                       stencil, /* dst addr */
 381                                       srcType, src, srcPacking,
 382                                       ctx->_ImageTransferState);
 383
 384          for (i = 0; i < srcWidth; i++) {
 385             if (keepstencil)
 386                dstRow[i] = depth[i] << 8 | (dstRow[i] & 0x000000FF);
 387             else
 388                dstRow[i] = (dstRow[i] & 0xFFFFFF00) | (stencil[i] & 0xFF);
 389          }
 390          src += srcRowStride;
 391          dstRow += dstRowStride / sizeof(GLuint);
 392       }
 393    }
 394
 395    free(depth);
 396    free(stencil);
 397    return GL_TRUE;
 398 }
 399
 400
 401 /**
 402  * Store a combined depth/stencil texture image.
 403  */
 404 static GLboolean
 405 _mesa_texstore_s8_z24(TEXSTORE_PARAMS)
 406 {
 407    const GLuint depthScale = 0xffffff;
 408    const GLint srcRowStride
 409       = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType);
 410    GLint img, row;
 411    GLuint *depth;
 412    GLubyte *stencil;
 413
 414    assert(dstFormat == MESA_FORMAT_Z24_UNORM_S8_UINT);
 415    assert(srcFormat == GL_DEPTH_STENCIL_EXT ||
 416           srcFormat == GL_DEPTH_COMPONENT ||
 417           srcFormat == GL_STENCIL_INDEX);
 418    assert(srcFormat != GL_DEPTH_STENCIL_EXT ||
 419           srcType == GL_UNSIGNED_INT_24_8_EXT ||
 420           srcType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
 421
 422    depth = malloc(srcWidth * sizeof(GLuint));
 423    stencil = malloc(srcWidth * sizeof(GLubyte));
 424
 425    if (!depth || !stencil) {
 426       free(depth);
 427       free(stencil);
 428       return GL_FALSE;
 429    }
 430
 431    for (img = 0; img < srcDepth; img++) {
 432       GLuint *dstRow = (GLuint *) dstSlices[img];
 433       const GLubyte *src
 434          = (const GLubyte *) _mesa_image_address(dims, srcPacking, srcAddr,
 435                                                 srcWidth, srcHeight,
 436                                                 srcFormat, srcType,
 437                                                 img, 0, 0);
 438       for (row = 0; row < srcHeight; row++) {
 439          GLint i;
 440          GLboolean keepdepth = GL_FALSE, keepstencil = GL_FALSE;
 441
 442          if (srcFormat == GL_DEPTH_COMPONENT) { /* preserve stencil */
 443             keepstencil = GL_TRUE;
 444          }
 445          else if (srcFormat == GL_STENCIL_INDEX) { /* preserve depth */
 446             keepdepth = GL_TRUE;
 447          }
 448
 449          if (keepdepth == GL_FALSE)
 450             /* the 24 depth bits will be in the low position: */
 451             _mesa_unpack_depth_span(ctx, srcWidth,
 452                                     GL_UNSIGNED_INT, /* dst type */
 453                                     keepstencil ? depth : dstRow, /* dst addr */
 454                                     depthScale,
 455                                     srcType, src, srcPacking);
 456
 457          if (keepstencil == GL_FALSE)
 458             /* get the 8-bit stencil values */
 459             _mesa_unpack_stencil_span(ctx, srcWidth,
 460                                       GL_UNSIGNED_BYTE, /* dst type */
 461                                       stencil, /* dst addr */
 462                                       srcType, src, srcPacking,
 463                                       ctx->_ImageTransferState);
 464
 465          /* merge stencil values into depth values */
 466          for (i = 0; i < srcWidth; i++) {
 467             if (keepstencil)
 468                dstRow[i] = depth[i] | (dstRow[i] & 0xFF000000);
 469             else
 470                dstRow[i] = (dstRow[i] & 0xFFFFFF) | (stencil[i] << 24);
 471
 472          }
 473          src += srcRowStride;
 474          dstRow += dstRowStride / sizeof(GLuint);
 475       }
 476    }
 477
 478    free(depth);
 479    free(stencil);
 480
 481    return GL_TRUE;
 482 }
 483
 484
 485 /**
 486  * Store simple 8-bit/value stencil texture data.
 487  */
 488 static GLboolean
 489 _mesa_texstore_s8(TEXSTORE_PARAMS)
 490 {
 491    assert(dstFormat == MESA_FORMAT_S_UINT8);
 492    assert(srcFormat == GL_STENCIL_INDEX);
 493
 494    {
 495       const GLint srcRowStride
 496          = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType);
 497       GLint img, row;
 498       GLubyte *stencil = malloc(srcWidth * sizeof(GLubyte));
 499
 500       if (!stencil)
 501          return GL_FALSE;
 502
 503       for (img = 0; img < srcDepth; img++) {
 504          GLubyte *dstRow = dstSlices[img];
 505          const GLubyte *src
 506             = (const GLubyte *) _mesa_image_address(dims, srcPacking, srcAddr,
 507                                                    srcWidth, srcHeight,
 508                                                    srcFormat, srcType,
 509                                                    img, 0, 0);
 510          for (row = 0; row < srcHeight; row++) {
 511             GLint i;
 512
 513             /* get the 8-bit stencil values */
 514             _mesa_unpack_stencil_span(ctx, srcWidth,
 515                                       GL_UNSIGNED_BYTE, /* dst type */
 516                                       stencil, /* dst addr */
 517                                       srcType, src, srcPacking,
 518                                       ctx->_ImageTransferState);
 519             /* merge stencil values into depth values */
 520             for (i = 0; i < srcWidth; i++)
 521                dstRow[i] = stencil[i];
 522
 523             src += srcRowStride;
 524             dstRow += dstRowStride / sizeof(GLubyte);
 525          }
 526       }
 527
 528       free(stencil);
 529    }
 530
 531    return GL_TRUE;
 532 }
 533
 534
 535 static GLboolean
 536 _mesa_texstore_z32f_x24s8(TEXSTORE_PARAMS)
 537 {
 538    GLint img, row;
 539    const GLint srcRowStride
 540       = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType)
 541       / sizeof(uint64_t);
 542
 543    assert(dstFormat == MESA_FORMAT_Z32_FLOAT_S8X24_UINT);
 544    assert(srcFormat == GL_DEPTH_STENCIL ||
 545           srcFormat == GL_DEPTH_COMPONENT ||
 546           srcFormat == GL_STENCIL_INDEX);
 547    assert(srcFormat != GL_DEPTH_STENCIL ||
 548           srcType == GL_UNSIGNED_INT_24_8 ||
 549           srcType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
 550
 551    /* In case we only upload depth we need to preserve the stencil */
 552    for (img = 0; img < srcDepth; img++) {
 553       uint64_t *dstRow = (uint64_t *) dstSlices[img];
 554       const uint64_t *src
 555          = (const uint64_t *) _mesa_image_address(dims, srcPacking, srcAddr,
 556                srcWidth, srcHeight,
 557                srcFormat, srcType,
 558                img, 0, 0);
 559       for (row = 0; row < srcHeight; row++) {
 560          /* The unpack functions with:
 561           *    dstType = GL_FLOAT_32_UNSIGNED_INT_24_8_REV
 562           * only write their own dword, so the other dword (stencil
 563           * or depth) is preserved. */
 564          if (srcFormat != GL_STENCIL_INDEX)
 565             _mesa_unpack_depth_span(ctx, srcWidth,
 566                                     GL_FLOAT_32_UNSIGNED_INT_24_8_REV, /* dst type */
 567                                     dstRow, /* dst addr */
 568                                     ~0U, srcType, src, srcPacking);
 569
 570          if (srcFormat != GL_DEPTH_COMPONENT)
 571             _mesa_unpack_stencil_span(ctx, srcWidth,
 572                                       GL_FLOAT_32_UNSIGNED_INT_24_8_REV, /* dst type */
 573                                       dstRow, /* dst addr */
 574                                       srcType, src, srcPacking,
 575                                       ctx->_ImageTransferState);
 576
 577          src += srcRowStride;
 578          dstRow += dstRowStride / sizeof(uint64_t);
 579       }
 580    }
 581    return GL_TRUE;
 582 }
 583
 584 static GLboolean
 585 texstore_depth_stencil(TEXSTORE_PARAMS)
 586 {
 587    static StoreTexImageFunc table[MESA_FORMAT_COUNT];
 588    static GLboolean initialized = GL_FALSE;
 589
 590    if (!initialized) {
 591       memset(table, 0, sizeof table);
 592
 593       table[MESA_FORMAT_S8_UINT_Z24_UNORM] = _mesa_texstore_z24_s8;
 594       table[MESA_FORMAT_Z24_UNORM_S8_UINT] = _mesa_texstore_s8_z24;
 595       table[MESA_FORMAT_Z_UNORM16] = _mesa_texstore_z16;
 596       table[MESA_FORMAT_Z24_UNORM_X8_UINT] = _mesa_texstore_x8_z24;
 597       table[MESA_FORMAT_X8_UINT_Z24_UNORM] = _mesa_texstore_z24_x8;
 598       table[MESA_FORMAT_Z_UNORM32] = _mesa_texstore_z32;
 599       table[MESA_FORMAT_S_UINT8] = _mesa_texstore_s8;
 600       table[MESA_FORMAT_Z_FLOAT32] = _mesa_texstore_z32;
 601       table[MESA_FORMAT_Z32_FLOAT_S8X24_UINT] = _mesa_texstore_z32f_x24s8;
 602
 603       initialized = GL_TRUE;
 604    }
 605
 606    assert(table[dstFormat]);
 607    return table[dstFormat](ctx, dims, baseInternalFormat,
 608                            dstFormat, dstRowStride, dstSlices,
 609                            srcWidth, srcHeight, srcDepth,
 610                            srcFormat, srcType, srcAddr, srcPacking);
 611 }
 612
 613 static GLboolean
 614 texstore_compressed(TEXSTORE_PARAMS)
 615 {
 616    static StoreTexImageFunc table[MESA_FORMAT_COUNT];
 617    static GLboolean initialized = GL_FALSE;
 618
 619    if (!initialized) {
 620       memset(table, 0, sizeof table);
 621
 622       table[MESA_FORMAT_SRGB_DXT1] = _mesa_texstore_rgb_dxt1;
 623       table[MESA_FORMAT_SRGBA_DXT1] = _mesa_texstore_rgba_dxt1;
 624       table[MESA_FORMAT_SRGBA_DXT3] = _mesa_texstore_rgba_dxt3;
 625       table[MESA_FORMAT_SRGBA_DXT5] = _mesa_texstore_rgba_dxt5;
 626       table[MESA_FORMAT_RGB_FXT1] = _mesa_texstore_rgb_fxt1;
 627       table[MESA_FORMAT_RGBA_FXT1] = _mesa_texstore_rgba_fxt1;
 628       table[MESA_FORMAT_RGB_DXT1] = _mesa_texstore_rgb_dxt1;
 629       table[MESA_FORMAT_RGBA_DXT1] = _mesa_texstore_rgba_dxt1;
 630       table[MESA_FORMAT_RGBA_DXT3] = _mesa_texstore_rgba_dxt3;
 631       table[MESA_FORMAT_RGBA_DXT5] = _mesa_texstore_rgba_dxt5;
 632       table[MESA_FORMAT_R_RGTC1_UNORM] = _mesa_texstore_red_rgtc1;
 633       table[MESA_FORMAT_R_RGTC1_SNORM] = _mesa_texstore_signed_red_rgtc1;
 634       table[MESA_FORMAT_RG_RGTC2_UNORM] = _mesa_texstore_rg_rgtc2;
 635       table[MESA_FORMAT_RG_RGTC2_SNORM] = _mesa_texstore_signed_rg_rgtc2;
 636       table[MESA_FORMAT_L_LATC1_UNORM] = _mesa_texstore_red_rgtc1;
 637       table[MESA_FORMAT_L_LATC1_SNORM] = _mesa_texstore_signed_red_rgtc1;
 638       table[MESA_FORMAT_LA_LATC2_UNORM] = _mesa_texstore_rg_rgtc2;
 639       table[MESA_FORMAT_LA_LATC2_SNORM] = _mesa_texstore_signed_rg_rgtc2;
 640       table[MESA_FORMAT_ETC1_RGB8] = _mesa_texstore_etc1_rgb8;
 641       table[MESA_FORMAT_ETC2_RGB8] = _mesa_texstore_etc2_rgb8;
 642       table[MESA_FORMAT_ETC2_SRGB8] = _mesa_texstore_etc2_srgb8;
 643       table[MESA_FORMAT_ETC2_RGBA8_EAC] = _mesa_texstore_etc2_rgba8_eac;
 644       table[MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC] = _mesa_texstore_etc2_srgb8_alpha8_eac;
 645       table[MESA_FORMAT_ETC2_R11_EAC] = _mesa_texstore_etc2_r11_eac;
 646       table[MESA_FORMAT_ETC2_RG11_EAC] = _mesa_texstore_etc2_rg11_eac;
 647       table[MESA_FORMAT_ETC2_SIGNED_R11_EAC] = _mesa_texstore_etc2_signed_r11_eac;
 648       table[MESA_FORMAT_ETC2_SIGNED_RG11_EAC] = _mesa_texstore_etc2_signed_rg11_eac;
 649       table[MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1] =
 650          _mesa_texstore_etc2_rgb8_punchthrough_alpha1;
 651       table[MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1] =
 652          _mesa_texstore_etc2_srgb8_punchthrough_alpha1;
 653
 654       table[MESA_FORMAT_BPTC_RGBA_UNORM] =
 655          _mesa_texstore_bptc_rgba_unorm;
 656       table[MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM] =
 657          _mesa_texstore_bptc_rgba_unorm;
 658       table[MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT] =
 659          _mesa_texstore_bptc_rgb_signed_float;
 660       table[MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT] =
 661          _mesa_texstore_bptc_rgb_unsigned_float;
 662
 663       initialized = GL_TRUE;
 664    }
 665
 666    assert(table[dstFormat]);
 667    return table[dstFormat](ctx, dims, baseInternalFormat,
 668                            dstFormat, dstRowStride, dstSlices,
 669                            srcWidth, srcHeight, srcDepth,
 670                            srcFormat, srcType, srcAddr, srcPacking);
 671 }
 672
 673 static GLboolean
 674 texstore_rgba(TEXSTORE_PARAMS)
 675 {
 676    void *tempImage = NULL, *tempRGBA = NULL;
 677    int srcRowStride, img;
 678    GLubyte *src, *dst;
 679    uint32_t srcMesaFormat;
 680    uint8_t rebaseSwizzle[4];
 681    bool needRebase;
 682    bool transferOpsDone = false;
 683
 684    /* We have to handle MESA_FORMAT_YCBCR manually because it is a special case
 685     * and _mesa_format_convert does not support it. In this case the we only
 686     * allow conversions between YCBCR formats and it is mostly a memcpy.
 687     */
 688    if (dstFormat == MESA_FORMAT_YCBCR || dstFormat == MESA_FORMAT_YCBCR_REV) {
 689       return _mesa_texstore_ycbcr(ctx, dims, baseInternalFormat,
 690                                   dstFormat, dstRowStride, dstSlices,
 691                                   srcWidth, srcHeight, srcDepth,
 692                                   srcFormat, srcType, srcAddr,
 693                                   srcPacking);
 694    }
 695
 696    /* We have to deal with GL_COLOR_INDEX manually because
 697     * _mesa_format_convert does not handle this format. So what we do here is
 698     * convert it to RGBA ubyte first and then convert from that to dst as usual.
 699     */
 700    if (srcFormat == GL_COLOR_INDEX) {
 701       /* Notice that this will already handle byte swapping if necessary */
 702       tempImage =
 703          _mesa_unpack_color_index_to_rgba_ubyte(ctx, dims,
 704                                                 srcAddr, srcFormat, srcType,
 705                                                 srcWidth, srcHeight, srcDepth,
 706                                                 srcPacking,
 707                                                 ctx->_ImageTransferState);
 708       if (!tempImage)
 709          return GL_FALSE;
 710
 711       /* _mesa_unpack_color_index_to_rgba_ubyte has handled transferops
 712        * if needed.
 713        */
 714       transferOpsDone = true;
 715
 716       /* Now we only have to adjust our src info for a conversion from
 717        * the RGBA ubyte and then we continue as usual.
 718        */
 719       srcAddr = tempImage;
 720       srcFormat = GL_RGBA;
 721       srcType = GL_UNSIGNED_BYTE;
 722    } else if (srcPacking->SwapBytes) {
 723       /* We have to handle byte-swapping scenarios before calling
 724        * _mesa_format_convert
 725        */
 726       GLint swapSize = _mesa_sizeof_packed_type(srcType);
 727       if (swapSize == 2 || swapSize == 4) {
 728          int imageStride = _mesa_image_image_stride(srcPacking, srcWidth, srcHeight, srcFormat, srcType);
 729          int bufferSize = imageStride * srcDepth;
 730          int layer;
 731          const uint8_t *src;
 732          uint8_t *dst;
 733
 734          tempImage = malloc(bufferSize);
 735          if (!tempImage)
 736             return GL_FALSE;
 737          src = srcAddr;
 738          dst = tempImage;
 739          for (layer = 0; layer < srcDepth; layer++) {
 740             _mesa_swap_bytes_2d_image(srcFormat, srcType,
 741                                       srcPacking,
 742                                       srcWidth, srcHeight,
 743                                       dst, src);
 744             src += imageStride;
 745             dst += imageStride;
 746          }
 747          srcAddr = tempImage;
 748       }
 749    }
 750
 751    srcRowStride =
 752       _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType);
 753
 754    srcMesaFormat = _mesa_format_from_format_and_type(srcFormat, srcType);
 755    dstFormat = _mesa_get_srgb_format_linear(dstFormat);
 756
 757    /* If we have transferOps then we need to convert to RGBA float first,
 758       then apply transferOps, then do the conversion to dst
 759     */
 760    if (!transferOpsDone &&
 761        _mesa_texstore_needs_transfer_ops(ctx, baseInternalFormat, dstFormat)) {
 762       /* Allocate RGBA float image */
 763       int elementCount = srcWidth * srcHeight * srcDepth;
 764       tempRGBA = malloc(4 * elementCount * sizeof(float));
 765       if (!tempRGBA) {
 766          free(tempImage);
 767          free(tempRGBA);
 768          return GL_FALSE;
 769       }
 770
 771       /* Convert from src to RGBA float */
 772       src = (GLubyte *) srcAddr;
 773       dst = (GLubyte *) tempRGBA;
 774       for (img = 0; img < srcDepth; img++) {
 775          _mesa_format_convert(dst, RGBA32_FLOAT, 4 * srcWidth * sizeof(float),
 776                               src, srcMesaFormat, srcRowStride,
 777                               srcWidth, srcHeight, NULL);
 778          src += srcHeight * srcRowStride;
 779          dst += srcHeight * 4 * srcWidth * sizeof(float);
 780       }
 781
 782       /* Apply transferOps */
 783       _mesa_apply_rgba_transfer_ops(ctx, ctx->_ImageTransferState, elementCount,
 784                                     (float(*)[4]) tempRGBA);
 785
 786       /* Now we have to adjust our src info for a conversion from
 787        * the RGBA float image and then we continue as usual.
 788        */
 789       srcAddr = tempRGBA;
 790       srcFormat = GL_RGBA;
 791       srcType = GL_FLOAT;
 792       srcRowStride = srcWidth * 4 * sizeof(float);
 793       srcMesaFormat = RGBA32_FLOAT;
 794       srcPacking = &ctx->DefaultPacking;
 795    }
 796
 797    src = (GLubyte *)
 798       _mesa_image_address(dims, srcPacking, srcAddr, srcWidth, srcHeight,
 799                           srcFormat, srcType, 0, 0, 0);
 800
 801    if (_mesa_get_format_base_format(dstFormat) != baseInternalFormat) {
 802       needRebase =
 803          _mesa_compute_rgba2base2rgba_component_mapping(baseInternalFormat,
 804                                                         rebaseSwizzle);
 805    } else {
 806       needRebase = false;
 807    }
 808
 809    for (img = 0; img < srcDepth; img++) {
 810       _mesa_format_convert(dstSlices[img], dstFormat, dstRowStride,
 811                            src, srcMesaFormat, srcRowStride,
 812                            srcWidth, srcHeight,
 813                            needRebase ? rebaseSwizzle : NULL);
 814       src += srcHeight * srcRowStride;
 815    }
 816
 817    free(tempImage);
 818    free(tempRGBA);
 819
 820    return GL_TRUE;
 821 }
 822
 823 GLboolean
 824 _mesa_texstore_needs_transfer_ops(struct gl_context *ctx,
 825                                   GLenum baseInternalFormat,
 826                                   mesa_format dstFormat)
 827 {
 828    GLenum dstType;
 829
 830    /* There are different rules depending on the base format. */
 831    switch (baseInternalFormat) {
 832    case GL_DEPTH_COMPONENT:
 833    case GL_DEPTH_STENCIL:
 834       return ctx->Pixel.DepthScale != 1.0f ||
 835              ctx->Pixel.DepthBias != 0.0f;
 836
 837    case GL_STENCIL_INDEX:
 838       return GL_FALSE;
 839
 840    default:
 841       /* Color formats.
 842        * Pixel transfer ops (scale, bias, table lookup) do not apply
 843        * to integer formats.
 844        */
 845       dstType = _mesa_get_format_datatype(dstFormat);
 846
 847       return dstType != GL_INT && dstType != GL_UNSIGNED_INT &&
 848              ctx->_ImageTransferState;
 849    }
 850 }
 851
 852
 853 GLboolean
 854 _mesa_texstore_can_use_memcpy(struct gl_context *ctx,
 855                               GLenum baseInternalFormat, mesa_format dstFormat,
 856                               GLenum srcFormat, GLenum srcType,
 857                               const struct gl_pixelstore_attrib *srcPacking)
 858 {
 859    if (_mesa_texstore_needs_transfer_ops(ctx, baseInternalFormat, dstFormat)) {
 860       return GL_FALSE;
 861    }
 862
 863    /* The base internal format and the base Mesa format must match. */
 864    if (baseInternalFormat != _mesa_get_format_base_format(dstFormat)) {
 865       return GL_FALSE;
 866    }
 867
 868    /* The Mesa format must match the input format and type. */
 869    if (!_mesa_format_matches_format_and_type(dstFormat, srcFormat, srcType,
 870                                              srcPacking->SwapBytes, NULL)) {
 871       return GL_FALSE;
 872    }
 873
 874    /* Depth texture data needs clamping in following cases:
 875     * - Floating point dstFormat with signed srcType: clamp to [0.0, 1.0].
 876     * - Fixed point dstFormat with signed srcType: clamp to [0, 2^n -1].
 877     *
 878     * All the cases except one (float dstFormat with float srcType) are ruled
 879     * out by _mesa_format_matches_format_and_type() check above. Handle the
 880     * remaining case here.
 881     */
 882    if ((baseInternalFormat == GL_DEPTH_COMPONENT ||
 883         baseInternalFormat == GL_DEPTH_STENCIL) &&
 884        (srcType == GL_FLOAT ||
 885         srcType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)) {
 886       return GL_FALSE;
 887    }
 888
 889    return GL_TRUE;
 890 }
 891
 892 static GLboolean
 893 _mesa_texstore_memcpy(TEXSTORE_PARAMS)
 894 {
 895    if (!_mesa_texstore_can_use_memcpy(ctx, baseInternalFormat, dstFormat,
 896                                       srcFormat, srcType, srcPacking)) {
 897       return GL_FALSE;
 898    }
 899
 900    _mesa_memcpy_texture(ctx, dims,
 901                         dstFormat,
 902                         dstRowStride, dstSlices,
 903                         srcWidth, srcHeight, srcDepth, srcFormat, srcType,
 904                         srcAddr, srcPacking);
 905    return GL_TRUE;
 906 }
 907
 908
 909 /**
 910  * Store user data into texture memory.
 911  * Called via glTex[Sub]Image1/2/3D()
 912  * \return GL_TRUE for success, GL_FALSE for failure (out of memory).
 913  */
 914 GLboolean
 915 _mesa_texstore(TEXSTORE_PARAMS)
 916 {
 917    if (_mesa_texstore_memcpy(ctx, dims, baseInternalFormat,
 918                              dstFormat,
 919                              dstRowStride, dstSlices,
 920                              srcWidth, srcHeight, srcDepth,
 921                              srcFormat, srcType, srcAddr, srcPacking)) {
 922       return GL_TRUE;
 923    }
 924
 925    if (_mesa_is_depth_or_stencil_format(baseInternalFormat)) {
 926       return texstore_depth_stencil(ctx, dims, baseInternalFormat,
 927                                     dstFormat, dstRowStride, dstSlices,
 928                                     srcWidth, srcHeight, srcDepth,
 929                                     srcFormat, srcType, srcAddr, srcPacking);
 930    } else if (_mesa_is_format_compressed(dstFormat)) {
 931       return texstore_compressed(ctx, dims, baseInternalFormat,
 932                                  dstFormat, dstRowStride, dstSlices,
 933                                  srcWidth, srcHeight, srcDepth,
 934                                  srcFormat, srcType, srcAddr, srcPacking);
 935    } else {
 936       return texstore_rgba(ctx, dims, baseInternalFormat,
 937                            dstFormat, dstRowStride, dstSlices,
 938                            srcWidth, srcHeight, srcDepth,
 939                            srcFormat, srcType, srcAddr, srcPacking);
 940    }
 941 }
 942
 943
 944 /**
 945  * Normally, we'll only _write_ texel data to a texture when we map it.
 946  * But if the user is providing depth or stencil values and the texture
 947  * image is a combined depth/stencil format, we'll actually read from
 948  * the texture buffer too (in order to insert the depth or stencil values.
 949  * \param userFormat  the user-provided image format
 950  * \param texFormat  the destination texture format
 951  */
 952 static GLbitfield
 953 get_read_write_mode(GLenum userFormat, mesa_format texFormat)
 954 {
 955    if ((userFormat == GL_STENCIL_INDEX || userFormat == GL_DEPTH_COMPONENT)
 956        && _mesa_get_format_base_format(texFormat) == GL_DEPTH_STENCIL)
 957       return GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
 958    else
 959       return GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT;
 960 }
 961
 962
 963 /**
 964  * Helper function for storing 1D, 2D, 3D whole and subimages into texture
 965  * memory.
 966  * The source of the image data may be user memory or a PBO.  In the later
 967  * case, we'll map the PBO, copy from it, then unmap it.
 968  */
 969 static void
 970 store_texsubimage(struct gl_context *ctx,
 971                   struct gl_texture_image *texImage,
 972                   GLint xoffset, GLint yoffset, GLint zoffset,
 973                   GLint width, GLint height, GLint depth,
 974                   GLenum format, GLenum type, const GLvoid *pixels,
 975                   const struct gl_pixelstore_attrib *packing,
 976                   const char *caller)
 977
 978 {
 979    const GLbitfield mapMode = get_read_write_mode(format, texImage->TexFormat);
 980    const GLenum target = texImage->TexObject->Target;
 981    GLboolean success = GL_FALSE;
 982    GLuint dims, slice, numSlices = 1, sliceOffset = 0;
 983    GLint srcImageStride = 0;
 984    const GLubyte *src;
 985
 986    assert(xoffset + width <= texImage->Width);
 987    assert(yoffset + height <= texImage->Height);
 988    assert(zoffset + depth <= texImage->Depth);
 989
 990    switch (target) {
 991    case GL_TEXTURE_1D:
 992       dims = 1;
 993       break;
 994    case GL_TEXTURE_2D_ARRAY:
 995    case GL_TEXTURE_CUBE_MAP_ARRAY:
 996    case GL_TEXTURE_3D:
 997       dims = 3;
 998       break;
 999    default:
1000       dims = 2;
1001    }
1002
1003    /* get pointer to src pixels (may be in a pbo which we'll map here) */
1004    src = (const GLubyte *)
1005       _mesa_validate_pbo_teximage(ctx, dims, width, height, depth,
1006                                   format, type, pixels, packing, caller);
1007    if (!src)
1008       return;
1009
1010    /* compute slice info (and do some sanity checks) */
1011    switch (target) {
1012    case GL_TEXTURE_2D:
1013    case GL_TEXTURE_2D_MULTISAMPLE:
1014    case GL_TEXTURE_RECTANGLE:
1015    case GL_TEXTURE_CUBE_MAP:
1016    case GL_TEXTURE_EXTERNAL_OES:
1017       /* one image slice, nothing special needs to be done */
1018       break;
1019    case GL_TEXTURE_1D:
1020       assert(height == 1);
1021       assert(depth == 1);
1022       assert(yoffset == 0);
1023       assert(zoffset == 0);
1024       break;
1025    case GL_TEXTURE_1D_ARRAY:
1026       assert(depth == 1);
1027       assert(zoffset == 0);
1028       numSlices = height;
1029       sliceOffset = yoffset;
1030       height = 1;
1031       yoffset = 0;
1032       srcImageStride = _mesa_image_row_stride(packing, width, format, type);
1033       break;
1034    case GL_TEXTURE_2D_ARRAY:
1035    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
1036       numSlices = depth;
1037       sliceOffset = zoffset;
1038       depth = 1;
1039       zoffset = 0;
1040       srcImageStride = _mesa_image_image_stride(packing, width, height,
1041                                                 format, type);
1042       break;
1043    case GL_TEXTURE_3D:
1044       /* we'll store 3D images as a series of slices */
1045       numSlices = depth;
1046       sliceOffset = zoffset;
1047       srcImageStride = _mesa_image_image_stride(packing, width, height,
1048                                                 format, type);
1049       break;
1050    case GL_TEXTURE_CUBE_MAP_ARRAY:
1051       numSlices = depth;
1052       sliceOffset = zoffset;
1053       srcImageStride = _mesa_image_image_stride(packing, width, height,
1054                                                 format, type);
1055       break;
1056    default:
1057       _mesa_warning(ctx, "Unexpected target 0x%x in store_texsubimage()", target);
1058       return;
1059    }
1060
1061    assert(numSlices == 1 || srcImageStride != 0);
1062
1063    for (slice = 0; slice < numSlices; slice++) {
1064       GLubyte *dstMap;
1065       GLint dstRowStride;
1066
1067       ctx->Driver.MapTextureImage(ctx, texImage,
1068                                   slice + sliceOffset,
1069                                   xoffset, yoffset, width, height,
1070                                   mapMode, &dstMap, &dstRowStride);
1071       if (dstMap) {
1072          /* Note: we're only storing a 2D (or 1D) slice at a time but we need
1073           * to pass the right 'dims' value so that GL_UNPACK_SKIP_IMAGES is
1074           * used for 3D images.
1075           */
1076          success = _mesa_texstore(ctx, dims, texImage->_BaseFormat,
1077                                   texImage->TexFormat,
1078                                   dstRowStride,
1079                                   &dstMap,
1080                                   width, height, 1,  /* w, h, d */
1081                                   format, type, src, packing);
1082
1083          ctx->Driver.UnmapTextureImage(ctx, texImage, slice + sliceOffset);
1084       }
1085
1086       src += srcImageStride;
1087
1088       if (!success)
1089          break;
1090    }
1091
1092    if (!success)
1093       _mesa_error(ctx, GL_OUT_OF_MEMORY, "%s", caller);
1094
1095    _mesa_unmap_teximage_pbo(ctx, packing);
1096 }
1097
1098
1099
1100 /**
1101  * Fallback code for ctx->Driver.TexImage().
1102  * Basically, allocate storage for the texture image, then copy the
1103  * user's image into it.
1104  */
1105 void
1106 _mesa_store_teximage(struct gl_context *ctx,
1107                      GLuint dims,
1108                      struct gl_texture_image *texImage,
1109                      GLenum format, GLenum type, const GLvoid *pixels,
1110                      const struct gl_pixelstore_attrib *packing)
1111 {
1112    assert(dims == 1 || dims == 2 || dims == 3);
1113
1114    if (texImage->Width == 0 || texImage->Height == 0 || texImage->Depth == 0)
1115       return;
1116
1117    /* allocate storage for texture data */
1118    if (!ctx->Driver.AllocTextureImageBuffer(ctx, texImage)) {
1119       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
1120       return;
1121    }
1122
1123    store_texsubimage(ctx, texImage,
1124                      0, 0, 0, texImage->Width, texImage->Height, texImage->Depth,
1125                      format, type, pixels, packing, "glTexImage");
1126 }
1127
1128
1129 /*
1130  * Fallback for Driver.TexSubImage().
1131  */
1132 void
1133 _mesa_store_texsubimage(struct gl_context *ctx, GLuint dims,
1134                         struct gl_texture_image *texImage,
1135                         GLint xoffset, GLint yoffset, GLint zoffset,
1136                         GLint width, GLint height, GLint depth,
1137                         GLenum format, GLenum type, const void *pixels,
1138                         const struct gl_pixelstore_attrib *packing)
1139 {
1140    store_texsubimage(ctx, texImage,
1141                      xoffset, yoffset, zoffset, width, height, depth,
1142                      format, type, pixels, packing, "glTexSubImage");
1143 }
1144
1145 static void
1146 clear_image_to_zero(GLubyte *dstMap, GLint dstRowStride,
1147                     GLsizei width, GLsizei height,
1148                     GLsizei clearValueSize)
1149 {
1150    GLsizei y;
1151
1152    for (y = 0; y < height; y++) {
1153       memset(dstMap, 0, clearValueSize * width);
1154       dstMap += dstRowStride;
1155    }
1156 }
1157
1158 static void
1159 clear_image_to_value(GLubyte *dstMap, GLint dstRowStride,
1160                      GLsizei width, GLsizei height,
1161                      const GLvoid *clearValue,
1162                      GLsizei clearValueSize)
1163 {
1164    GLsizei y, x;
1165
1166    for (y = 0; y < height; y++) {
1167       for (x = 0; x < width; x++) {
1168          memcpy(dstMap, clearValue, clearValueSize);
1169          dstMap += clearValueSize;
1170       }
1171       dstMap += dstRowStride - clearValueSize * width;
1172    }
1173 }
1174
1175 /*
1176  * Fallback for Driver.ClearTexSubImage().
1177  */
1178 void
1179 _mesa_store_cleartexsubimage(struct gl_context *ctx,
1180                              struct gl_texture_image *texImage,
1181                              GLint xoffset, GLint yoffset, GLint zoffset,
1182                              GLsizei width, GLsizei height, GLsizei depth,
1183                              const GLvoid *clearValue)
1184 {
1185    GLubyte *dstMap;
1186    GLint dstRowStride;
1187    GLsizeiptr clearValueSize;
1188    GLsizei z;
1189
1190    clearValueSize = _mesa_get_format_bytes(texImage->TexFormat);
1191
1192    for (z = 0; z < depth; z++) {
1193       ctx->Driver.MapTextureImage(ctx, texImage,
1194                                   z + zoffset, xoffset, yoffset,
1195                                   width, height,
1196                                   GL_MAP_WRITE_BIT,
1197                                   &dstMap, &dstRowStride);
1198       if (dstMap == NULL) {
1199          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glClearTex*Image");
1200          return;
1201       }
1202
1203       if (clearValue) {
1204          clear_image_to_value(dstMap, dstRowStride,
1205                               width, height,
1206                               clearValue,
1207                               clearValueSize);
1208       } else {
1209          clear_image_to_zero(dstMap, dstRowStride,
1210                              width, height,
1211                              clearValueSize);
1212       }
1213
1214       ctx->Driver.UnmapTextureImage(ctx, texImage, z + zoffset);
1215    }
1216 }
1217
1218 /**
1219  * Fallback for Driver.CompressedTexImage()
1220  */
1221 void
1222 _mesa_store_compressed_teximage(struct gl_context *ctx, GLuint dims,
1223                                 struct gl_texture_image *texImage,
1224                                 GLsizei imageSize, const GLvoid *data)
1225 {
1226    /* only 2D and 3D compressed images are supported at this time */
1227    if (dims == 1) {
1228       _mesa_problem(ctx, "Unexpected glCompressedTexImage1D call");
1229       return;
1230    }
1231
1232    /* This is pretty simple, because unlike the general texstore path we don't
1233     * have to worry about the usual image unpacking or image transfer
1234     * operations.
1235     */
1236    assert(texImage);
1237    assert(texImage->Width > 0);
1238    assert(texImage->Height > 0);
1239    assert(texImage->Depth > 0);
1240
1241    /* allocate storage for texture data */
1242    if (!ctx->Driver.AllocTextureImageBuffer(ctx, texImage)) {
1243       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexImage%uD", dims);
1244       return;
1245    }
1246
1247    ctx->Driver.CompressedTexSubImage(ctx, dims, texImage,
1248                                      0, 0, 0,
1249                                      texImage->Width, texImage->Height, texImage->Depth,
1250                                      texImage->TexFormat,
1251                                      imageSize, data);
1252 }
1253
1254
1255 /**
1256  * Compute compressed_pixelstore parameters for copying compressed
1257  * texture data.
1258  * \param dims  number of texture image dimensions: 1, 2 or 3
1259  * \param texFormat  the compressed texture format
1260  * \param width, height, depth  size of image to copy
1261  * \param packing  pixelstore parameters describing user-space image packing
1262  * \param store  returns the compressed_pixelstore parameters
1263  */
1264 void
1265 _mesa_compute_compressed_pixelstore(GLuint dims, mesa_format texFormat,
1266                                     GLsizei width, GLsizei height,
1267                                     GLsizei depth,
1268                                     const struct gl_pixelstore_attrib *packing,
1269                                     struct compressed_pixelstore *store)
1270 {
1271    GLuint bw, bh, bd;
1272
1273    _mesa_get_format_block_size_3d(texFormat, &bw, &bh, &bd);
1274
1275    store->SkipBytes = 0;
1276    store->TotalBytesPerRow = store->CopyBytesPerRow =
1277          _mesa_format_row_stride(texFormat, width);
1278    store->TotalRowsPerSlice = store->CopyRowsPerSlice =
1279          (height + bh - 1) / bh;
1280    store->CopySlices = (depth + bd - 1) / bd;
1281
1282    if (packing->CompressedBlockWidth &&
1283        packing->CompressedBlockSize) {
1284
1285       bw = packing->CompressedBlockWidth;
1286
1287       if (packing->RowLength) {
1288          store->TotalBytesPerRow = packing->CompressedBlockSize *
1289             ((packing->RowLength + bw - 1) / bw);
1290       }
1291
1292       store->SkipBytes += packing->SkipPixels * packing->CompressedBlockSize / bw;
1293    }
1294
1295    if (dims > 1 && packing->CompressedBlockHeight &&
1296        packing->CompressedBlockSize) {
1297
1298       bh = packing->CompressedBlockHeight;
1299
1300       store->SkipBytes += packing->SkipRows * store->TotalBytesPerRow / bh;
1301       store->CopyRowsPerSlice = (height + bh - 1) / bh;  /* rows in blocks */
1302
1303       if (packing->ImageHeight) {
1304          store->TotalRowsPerSlice = (packing->ImageHeight + bh - 1) / bh;
1305       }
1306    }
1307
1308    if (dims > 2 && packing->CompressedBlockDepth &&
1309        packing->CompressedBlockSize) {
1310
1311       int bd = packing->CompressedBlockDepth;
1312
1313       store->SkipBytes += packing->SkipImages * store->TotalBytesPerRow *
1314             store->TotalRowsPerSlice / bd;
1315    }
1316 }
1317
1318
1319 /**
1320  * Fallback for Driver.CompressedTexSubImage()
1321  */
1322 void
1323 _mesa_store_compressed_texsubimage(struct gl_context *ctx, GLuint dims,
1324                                    struct gl_texture_image *texImage,
1325                                    GLint xoffset, GLint yoffset, GLint zoffset,
1326                                    GLsizei width, GLsizei height, GLsizei depth,
1327                                    GLenum format,
1328                                    GLsizei imageSize, const GLvoid *data)
1329 {
1330    struct compressed_pixelstore store;
1331    GLint dstRowStride;
1332    GLint i, slice;
1333    GLubyte *dstMap;
1334    const GLubyte *src;
1335
1336    if (dims == 1) {
1337       _mesa_problem(ctx, "Unexpected 1D compressed texsubimage call");
1338       return;
1339    }
1340
1341    _mesa_compute_compressed_pixelstore(dims, texImage->TexFormat,
1342                                        width, height, depth,
1343                                        &ctx->Unpack, &store);
1344
1345    /* get pointer to src pixels (may be in a pbo which we'll map here) */
1346    data = _mesa_validate_pbo_compressed_teximage(ctx, dims, imageSize, data,
1347                                                  &ctx->Unpack,
1348                                                  "glCompressedTexSubImage");
1349    if (!data)
1350       return;
1351
1352    src = (const GLubyte *) data + store.SkipBytes;
1353
1354    for (slice = 0; slice < store.CopySlices; slice++) {
1355       /* Map dest texture buffer */
1356       ctx->Driver.MapTextureImage(ctx, texImage, slice + zoffset,
1357                                   xoffset, yoffset, width, height,
1358                                   GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_RANGE_BIT,
1359                                   &dstMap, &dstRowStride);
1360
1361       if (dstMap) {
1362
1363          /* copy rows of blocks */
1364          if (dstRowStride == store.TotalBytesPerRow &&
1365              dstRowStride == store.CopyBytesPerRow) {
1366             memcpy(dstMap, src, store.CopyBytesPerRow * store.CopyRowsPerSlice);
1367             src += store.CopyBytesPerRow * store.CopyRowsPerSlice;
1368          }
1369          else {
1370             for (i = 0; i < store.CopyRowsPerSlice; i++) {
1371                memcpy(dstMap, src, store.CopyBytesPerRow);
1372                dstMap += dstRowStride;
1373                src += store.TotalBytesPerRow;
1374             }
1375          }
1376
1377          ctx->Driver.UnmapTextureImage(ctx, texImage, slice + zoffset);
1378
1379          /* advance to next slice */
1380          src += store.TotalBytesPerRow * (store.TotalRowsPerSlice - store.CopyRowsPerSlice);
1381       }
1382       else {
1383          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCompressedTexSubImage%uD",
1384                      dims);
1385       }
1386    }
1387
1388    _mesa_unmap_teximage_pbo(ctx, &ctx->Unpack);
1389 }