src/mesa/main/texcompress_rgtc.c

   1 /*
   2  * Copyright (C) 2011 Red Hat Inc.
   3  *
   4  * block compression parts are:
   5  * Copyright (C) 2004  Roland Scheidegger   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 (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * Author:
  27  *    Dave Airlie
  28  */
  29
  30 /**
  31  * \file texcompress_rgtc.c
  32  * GL_EXT_texture_compression_rgtc support.
  33  */
  34
  35
  36 #include "config.h"
  37 #include "glheader.h"
  38 #include "imports.h"
  39 #include "image.h"
  40 #include "macros.h"
  41 #include "mipmap.h"
  42 #include "texcompress.h"
  43 #include "util/rgtc.h"
  44 #include "texcompress_rgtc.h"
  45 #include "texstore.h"
  46
  47 static void extractsrc_u( GLubyte srcpixels[4][4], const GLubyte *srcaddr,
  48                           GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
  49 {
  50    GLubyte i, j;
  51    const GLubyte *curaddr;
  52    for (j = 0; j < numypixels; j++) {
  53       curaddr = srcaddr + j * srcRowStride * comps;
  54       for (i = 0; i < numxpixels; i++) {
  55          srcpixels[j][i] = *curaddr;
  56          curaddr += comps;
  57       }
  58    }
  59 }
  60
  61 static void extractsrc_s( GLbyte srcpixels[4][4], const GLfloat *srcaddr,
  62                           GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
  63 {
  64    GLubyte i, j;
  65    const GLfloat *curaddr;
  66    for (j = 0; j < numypixels; j++) {
  67       curaddr = srcaddr + j * srcRowStride * comps;
  68       for (i = 0; i < numxpixels; i++) {
  69          srcpixels[j][i] = FLOAT_TO_BYTE_TEX(*curaddr);
  70          curaddr += comps;
  71       }
  72    }
  73 }
  74
  75
  76 GLboolean
  77 _mesa_texstore_red_rgtc1(TEXSTORE_PARAMS)
  78 {
  79    GLubyte *dst;
  80    const GLubyte *tempImage = NULL;
  81    int i, j;
  82    int numxpixels, numypixels;
  83    const GLubyte *srcaddr;
  84    GLubyte srcpixels[4][4];
  85    GLubyte *blkaddr;
  86    GLint dstRowDiff, redRowStride;
  87    GLubyte *tempImageSlices[1];
  88
  89    assert(dstFormat == MESA_FORMAT_R_RGTC1_UNORM ||
  90           dstFormat == MESA_FORMAT_L_LATC1_UNORM);
  91
  92    tempImage = malloc(srcWidth * srcHeight * 1 * sizeof(GLubyte));
  93    if (!tempImage)
  94       return GL_FALSE; /* out of memory */
  95    redRowStride = 1 * srcWidth * sizeof(GLubyte);
  96    tempImageSlices[0] = (GLubyte *) tempImage;
  97    _mesa_texstore(ctx, dims,
  98                   baseInternalFormat,
  99                   MESA_FORMAT_R_UNORM8,
 100                   redRowStride, tempImageSlices,
 101                   srcWidth, srcHeight, srcDepth,
 102                   srcFormat, srcType, srcAddr,
 103                   srcPacking);
 104
 105    dst = dstSlices[0];
 106
 107    blkaddr = dst;
 108    dstRowDiff = dstRowStride >= (srcWidth * 2) ? dstRowStride - (((srcWidth + 3) & ~3) * 2) : 0;
 109    for (j = 0; j < srcHeight; j+=4) {
 110       if (srcHeight > j + 3) numypixels = 4;
 111       else numypixels = srcHeight - j;
 112       srcaddr = tempImage + j * srcWidth;
 113       for (i = 0; i < srcWidth; i += 4) {
 114          if (srcWidth > i + 3) numxpixels = 4;
 115          else numxpixels = srcWidth - i;
 116          extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
 117          util_format_unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 118          srcaddr += numxpixels;
 119          blkaddr += 8;
 120       }
 121       blkaddr += dstRowDiff;
 122    }
 123
 124    free((void *) tempImage);
 125
 126    return GL_TRUE;
 127 }
 128
 129 GLboolean
 130 _mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS)
 131 {
 132    GLbyte *dst;
 133    const GLfloat *tempImage = NULL;
 134    int i, j;
 135    int numxpixels, numypixels;
 136    const GLfloat *srcaddr;
 137    GLbyte srcpixels[4][4];
 138    GLbyte *blkaddr;
 139    GLint dstRowDiff, redRowStride;
 140    GLfloat *tempImageSlices[1];
 141
 142    assert(dstFormat == MESA_FORMAT_R_RGTC1_SNORM ||
 143           dstFormat == MESA_FORMAT_L_LATC1_SNORM);
 144
 145    redRowStride = 1 * srcWidth * sizeof(GLfloat);
 146    tempImage = malloc(srcWidth * srcHeight * 1 * sizeof(GLfloat));
 147    if (!tempImage)
 148       return GL_FALSE; /* out of memory */
 149    tempImageSlices[0] = (GLfloat *) tempImage;
 150    _mesa_texstore(ctx, dims,
 151                   baseInternalFormat,
 152                   MESA_FORMAT_R_FLOAT32,
 153                   redRowStride, (GLubyte **)tempImageSlices,
 154                   srcWidth, srcHeight, srcDepth,
 155                   srcFormat, srcType, srcAddr,
 156                   srcPacking);
 157
 158    dst = (GLbyte *) dstSlices[0];
 159
 160    blkaddr = dst;
 161    dstRowDiff = dstRowStride >= (srcWidth * 2) ? dstRowStride - (((srcWidth + 3) & ~3) * 2) : 0;
 162    for (j = 0; j < srcHeight; j+=4) {
 163       if (srcHeight > j + 3) numypixels = 4;
 164       else numypixels = srcHeight - j;
 165       srcaddr = tempImage + j * srcWidth;
 166       for (i = 0; i < srcWidth; i += 4) {
 167          if (srcWidth > i + 3) numxpixels = 4;
 168          else numxpixels = srcWidth - i;
 169          extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
 170          util_format_signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 171          srcaddr += numxpixels;
 172          blkaddr += 8;
 173       }
 174       blkaddr += dstRowDiff;
 175    }
 176
 177    free((void *) tempImage);
 178
 179    return GL_TRUE;
 180 }
 181
 182 GLboolean
 183 _mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS)
 184 {
 185    GLubyte *dst;
 186    const GLubyte *tempImage = NULL;
 187    int i, j;
 188    int numxpixels, numypixels;
 189    const GLubyte *srcaddr;
 190    GLubyte srcpixels[4][4];
 191    GLubyte *blkaddr;
 192    GLint dstRowDiff, rgRowStride;
 193    mesa_format tempFormat;
 194    GLubyte *tempImageSlices[1];
 195
 196    assert(dstFormat == MESA_FORMAT_RG_RGTC2_UNORM ||
 197           dstFormat == MESA_FORMAT_LA_LATC2_UNORM);
 198
 199    if (baseInternalFormat == GL_RG)
 200       tempFormat = MESA_FORMAT_RG_UNORM8;
 201    else
 202       tempFormat = MESA_FORMAT_LA_UNORM8;
 203
 204    rgRowStride = 2 * srcWidth * sizeof(GLubyte);
 205    tempImage = malloc(srcWidth * srcHeight * 2 * sizeof(GLubyte));
 206    if (!tempImage)
 207       return GL_FALSE; /* out of memory */
 208    tempImageSlices[0] = (GLubyte *) tempImage;
 209    _mesa_texstore(ctx, dims,
 210                   baseInternalFormat,
 211                   tempFormat,
 212                   rgRowStride, tempImageSlices,
 213                   srcWidth, srcHeight, srcDepth,
 214                   srcFormat, srcType, srcAddr,
 215                   srcPacking);
 216
 217    dst = dstSlices[0];
 218
 219    blkaddr = dst;
 220    dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
 221    for (j = 0; j < srcHeight; j+=4) {
 222       if (srcHeight > j + 3) numypixels = 4;
 223       else numypixels = srcHeight - j;
 224       srcaddr = tempImage + j * srcWidth * 2;
 225       for (i = 0; i < srcWidth; i += 4) {
 226          if (srcWidth > i + 3) numxpixels = 4;
 227          else numxpixels = srcWidth - i;
 228          extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
 229          util_format_unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 230
 231          blkaddr += 8;
 232          extractsrc_u(srcpixels, (GLubyte *)srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
 233          util_format_unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 234
 235          blkaddr += 8;
 236
 237          srcaddr += numxpixels * 2;
 238       }
 239       blkaddr += dstRowDiff;
 240    }
 241
 242    free((void *) tempImage);
 243
 244    return GL_TRUE;
 245 }
 246
 247 GLboolean
 248 _mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS)
 249 {
 250    GLbyte *dst;
 251    const GLfloat *tempImage = NULL;
 252    int i, j;
 253    int numxpixels, numypixels;
 254    const GLfloat *srcaddr;
 255    GLbyte srcpixels[4][4];
 256    GLbyte *blkaddr;
 257    GLint dstRowDiff, rgRowStride;
 258    mesa_format tempFormat;
 259    GLfloat *tempImageSlices[1];
 260
 261    assert(dstFormat == MESA_FORMAT_RG_RGTC2_SNORM ||
 262           dstFormat == MESA_FORMAT_LA_LATC2_SNORM);
 263
 264    if (baseInternalFormat == GL_RG)
 265       tempFormat = MESA_FORMAT_RG_FLOAT32;
 266    else
 267       tempFormat = MESA_FORMAT_LA_FLOAT32;
 268
 269    rgRowStride = 2 * srcWidth * sizeof(GLfloat);
 270    tempImage = malloc(srcWidth * srcHeight * 2 * sizeof(GLfloat));
 271    if (!tempImage)
 272       return GL_FALSE; /* out of memory */
 273    tempImageSlices[0] = (GLfloat *) tempImage;
 274    _mesa_texstore(ctx, dims,
 275                   baseInternalFormat,
 276                   tempFormat,
 277                   rgRowStride, (GLubyte **)tempImageSlices,
 278                   srcWidth, srcHeight, srcDepth,
 279                   srcFormat, srcType, srcAddr,
 280                   srcPacking);
 281
 282    dst = (GLbyte *) dstSlices[0];
 283
 284    blkaddr = dst;
 285    dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
 286    for (j = 0; j < srcHeight; j += 4) {
 287       if (srcHeight > j + 3) numypixels = 4;
 288       else numypixels = srcHeight - j;
 289       srcaddr = tempImage + j * srcWidth * 2;
 290       for (i = 0; i < srcWidth; i += 4) {
 291          if (srcWidth > i + 3) numxpixels = 4;
 292          else numxpixels = srcWidth - i;
 293
 294          extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
 295          util_format_signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 296          blkaddr += 8;
 297
 298          extractsrc_s(srcpixels, srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
 299          util_format_signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 300          blkaddr += 8;
 301
 302          srcaddr += numxpixels * 2;
 303
 304       }
 305       blkaddr += dstRowDiff;
 306    }
 307
 308    free((void *) tempImage);
 309
 310    return GL_TRUE;
 311 }
 312
 313 static void
 314 fetch_red_rgtc1(const GLubyte *map,
 315                 GLint rowStride, GLint i, GLint j, GLfloat *texel)
 316 {
 317    GLubyte red;
 318    util_format_unsigned_fetch_texel_rgtc(rowStride, map, i, j, &red, 1);
 319    texel[RCOMP] = UBYTE_TO_FLOAT(red);
 320    texel[GCOMP] = 0.0;
 321    texel[BCOMP] = 0.0;
 322    texel[ACOMP] = 1.0;
 323 }
 324
 325 static void
 326 fetch_l_latc1(const GLubyte *map,
 327               GLint rowStride, GLint i, GLint j, GLfloat *texel)
 328 {
 329    GLubyte red;
 330    util_format_unsigned_fetch_texel_rgtc(rowStride, map, i, j, &red, 1);
 331    texel[RCOMP] =
 332    texel[GCOMP] =
 333    texel[BCOMP] = UBYTE_TO_FLOAT(red);
 334    texel[ACOMP] = 1.0;
 335 }
 336
 337 static void
 338 fetch_signed_red_rgtc1(const GLubyte *map,
 339                        GLint rowStride, GLint i, GLint j, GLfloat *texel)
 340 {
 341    GLbyte red;
 342    util_format_signed_fetch_texel_rgtc(rowStride, (const GLbyte *) map,
 343                            i, j, &red, 1);
 344    texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
 345    texel[GCOMP] = 0.0;
 346    texel[BCOMP] = 0.0;
 347    texel[ACOMP] = 1.0;
 348 }
 349
 350 static void
 351 fetch_signed_l_latc1(const GLubyte *map,
 352                      GLint rowStride, GLint i, GLint j, GLfloat *texel)
 353 {
 354    GLbyte red;
 355    util_format_signed_fetch_texel_rgtc(rowStride, (GLbyte *) map,
 356                            i, j, &red, 1);
 357    texel[RCOMP] =
 358    texel[GCOMP] =
 359    texel[BCOMP] = BYTE_TO_FLOAT(red);
 360    texel[ACOMP] = 1.0;
 361 }
 362
 363 static void
 364 fetch_rg_rgtc2(const GLubyte *map,
 365                GLint rowStride, GLint i, GLint j, GLfloat *texel)
 366 {
 367    GLubyte red, green;
 368    util_format_unsigned_fetch_texel_rgtc(rowStride,
 369                              map,
 370                              i, j, &red, 2);
 371    util_format_unsigned_fetch_texel_rgtc(rowStride,
 372                              map + 8,
 373                              i, j, &green, 2);
 374    texel[RCOMP] = UBYTE_TO_FLOAT(red);
 375    texel[GCOMP] = UBYTE_TO_FLOAT(green);
 376    texel[BCOMP] = 0.0;
 377    texel[ACOMP] = 1.0;
 378 }
 379
 380 static void
 381 fetch_la_latc2(const GLubyte *map,
 382                GLint rowStride, GLint i, GLint j, GLfloat *texel)
 383 {
 384    GLubyte red, green;
 385    util_format_unsigned_fetch_texel_rgtc(rowStride,
 386                              map,
 387                              i, j, &red, 2);
 388    util_format_unsigned_fetch_texel_rgtc(rowStride,
 389                              map + 8,
 390                              i, j, &green, 2);
 391    texel[RCOMP] =
 392    texel[GCOMP] =
 393    texel[BCOMP] = UBYTE_TO_FLOAT(red);
 394    texel[ACOMP] = UBYTE_TO_FLOAT(green);
 395 }
 396
 397
 398 static void
 399 fetch_signed_rg_rgtc2(const GLubyte *map,
 400                       GLint rowStride, GLint i, GLint j, GLfloat *texel)
 401 {
 402    GLbyte red, green;
 403    util_format_signed_fetch_texel_rgtc(rowStride,
 404                            (GLbyte *) map,
 405                            i, j, &red, 2);
 406    util_format_signed_fetch_texel_rgtc(rowStride,
 407                            (GLbyte *) map + 8,
 408                            i, j, &green, 2);
 409    texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
 410    texel[GCOMP] = BYTE_TO_FLOAT_TEX(green);
 411    texel[BCOMP] = 0.0;
 412    texel[ACOMP] = 1.0;
 413 }
 414
 415
 416 static void
 417 fetch_signed_la_latc2(const GLubyte *map,
 418                       GLint rowStride, GLint i, GLint j, GLfloat *texel)
 419 {
 420    GLbyte red, green;
 421    util_format_signed_fetch_texel_rgtc(rowStride,
 422                            (GLbyte *) map,
 423                            i, j, &red, 2);
 424    util_format_signed_fetch_texel_rgtc(rowStride,
 425                            (GLbyte *) map + 8,
 426                            i, j, &green, 2);
 427    texel[RCOMP] =
 428    texel[GCOMP] =
 429    texel[BCOMP] = BYTE_TO_FLOAT_TEX(red);
 430    texel[ACOMP] = BYTE_TO_FLOAT_TEX(green);
 431 }
 432
 433
 434 compressed_fetch_func
 435 _mesa_get_compressed_rgtc_func(mesa_format format)
 436 {
 437    switch (format) {
 438    case MESA_FORMAT_R_RGTC1_UNORM:
 439       return fetch_red_rgtc1;
 440    case MESA_FORMAT_L_LATC1_UNORM:
 441       return fetch_l_latc1;
 442    case MESA_FORMAT_R_RGTC1_SNORM:
 443       return fetch_signed_red_rgtc1;
 444    case MESA_FORMAT_L_LATC1_SNORM:
 445       return fetch_signed_l_latc1;
 446    case MESA_FORMAT_RG_RGTC2_UNORM:
 447       return fetch_rg_rgtc2;
 448    case MESA_FORMAT_LA_LATC2_UNORM:
 449       return fetch_la_latc2;
 450    case MESA_FORMAT_RG_RGTC2_SNORM:
 451       return fetch_signed_rg_rgtc2;
 452    case MESA_FORMAT_LA_LATC2_SNORM:
 453       return fetch_signed_la_latc2;
 454    default:
 455       return NULL;
 456    }
 457 }