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 "glheader.h"
  37 #include "imports.h"
  38 #include "image.h"
  39 #include "macros.h"
  40 #include "mipmap.h"
  41 #include "texcompress.h"
  42 #include "util/rgtc.h"
  43 #include "texcompress_rgtc.h"
  44 #include "texstore.h"
  45
  46 static void extractsrc_u( GLubyte srcpixels[4][4], const GLubyte *srcaddr,
  47                           GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
  48 {
  49    GLubyte i, j;
  50    const GLubyte *curaddr;
  51    for (j = 0; j < numypixels; j++) {
  52       curaddr = srcaddr + j * srcRowStride * comps;
  53       for (i = 0; i < numxpixels; i++) {
  54          srcpixels[j][i] = *curaddr;
  55          curaddr += comps;
  56       }
  57    }
  58 }
  59
  60 static void extractsrc_s( GLbyte srcpixels[4][4], const GLfloat *srcaddr,
  61                           GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
  62 {
  63    GLubyte i, j;
  64    const GLfloat *curaddr;
  65    for (j = 0; j < numypixels; j++) {
  66       curaddr = srcaddr + j * srcRowStride * comps;
  67       for (i = 0; i < numxpixels; i++) {
  68          srcpixels[j][i] = FLOAT_TO_BYTE_TEX(*curaddr);
  69          curaddr += comps;
  70       }
  71    }
  72 }
  73
  74
  75 GLboolean
  76 _mesa_texstore_red_rgtc1(TEXSTORE_PARAMS)
  77 {
  78    GLubyte *dst;
  79    const GLubyte *tempImage = NULL;
  80    int i, j;
  81    int numxpixels, numypixels;
  82    const GLubyte *srcaddr;
  83    GLubyte srcpixels[4][4];
  84    GLubyte *blkaddr;
  85    GLint dstRowDiff, redRowStride;
  86    GLubyte *tempImageSlices[1];
  87
  88    assert(dstFormat == MESA_FORMAT_R_RGTC1_UNORM ||
  89           dstFormat == MESA_FORMAT_L_LATC1_UNORM);
  90
  91    tempImage = malloc(srcWidth * srcHeight * 1 * sizeof(GLubyte));
  92    if (!tempImage)
  93       return GL_FALSE; /* out of memory */
  94    redRowStride = 1 * srcWidth * sizeof(GLubyte);
  95    tempImageSlices[0] = (GLubyte *) tempImage;
  96    _mesa_texstore(ctx, dims,
  97                   baseInternalFormat,
  98                   MESA_FORMAT_R_UNORM8,
  99                   redRowStride, tempImageSlices,
 100                   srcWidth, srcHeight, srcDepth,
 101                   srcFormat, srcType, srcAddr,
 102                   srcPacking);
 103
 104    dst = dstSlices[0];
 105
 106    blkaddr = dst;
 107    dstRowDiff = dstRowStride >= (srcWidth * 2) ? dstRowStride - (((srcWidth + 3) & ~3) * 2) : 0;
 108    for (j = 0; j < srcHeight; j+=4) {
 109       if (srcHeight > j + 3) numypixels = 4;
 110       else numypixels = srcHeight - j;
 111       srcaddr = tempImage + j * srcWidth;
 112       for (i = 0; i < srcWidth; i += 4) {
 113          if (srcWidth > i + 3) numxpixels = 4;
 114          else numxpixels = srcWidth - i;
 115          extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
 116          util_format_unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 117          srcaddr += numxpixels;
 118          blkaddr += 8;
 119       }
 120       blkaddr += dstRowDiff;
 121    }
 122
 123    free((void *) tempImage);
 124
 125    return GL_TRUE;
 126 }
 127
 128 GLboolean
 129 _mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS)
 130 {
 131    GLbyte *dst;
 132    const GLfloat *tempImage = NULL;
 133    int i, j;
 134    int numxpixels, numypixels;
 135    const GLfloat *srcaddr;
 136    GLbyte srcpixels[4][4];
 137    GLbyte *blkaddr;
 138    GLint dstRowDiff, redRowStride;
 139    GLfloat *tempImageSlices[1];
 140
 141    assert(dstFormat == MESA_FORMAT_R_RGTC1_SNORM ||
 142           dstFormat == MESA_FORMAT_L_LATC1_SNORM);
 143
 144    redRowStride = 1 * srcWidth * sizeof(GLfloat);
 145    tempImage = malloc(srcWidth * srcHeight * 1 * sizeof(GLfloat));
 146    if (!tempImage)
 147       return GL_FALSE; /* out of memory */
 148    tempImageSlices[0] = (GLfloat *) tempImage;
 149    _mesa_texstore(ctx, dims,
 150                   baseInternalFormat,
 151                   MESA_FORMAT_R_FLOAT32,
 152                   redRowStride, (GLubyte **)tempImageSlices,
 153                   srcWidth, srcHeight, srcDepth,
 154                   srcFormat, srcType, srcAddr,
 155                   srcPacking);
 156
 157    dst = (GLbyte *) dstSlices[0];
 158
 159    blkaddr = dst;
 160    dstRowDiff = dstRowStride >= (srcWidth * 2) ? dstRowStride - (((srcWidth + 3) & ~3) * 2) : 0;
 161    for (j = 0; j < srcHeight; j+=4) {
 162       if (srcHeight > j + 3) numypixels = 4;
 163       else numypixels = srcHeight - j;
 164       srcaddr = tempImage + j * srcWidth;
 165       for (i = 0; i < srcWidth; i += 4) {
 166          if (srcWidth > i + 3) numxpixels = 4;
 167          else numxpixels = srcWidth - i;
 168          extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
 169          util_format_signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 170          srcaddr += numxpixels;
 171          blkaddr += 8;
 172       }
 173       blkaddr += dstRowDiff;
 174    }
 175
 176    free((void *) tempImage);
 177
 178    return GL_TRUE;
 179 }
 180
 181 GLboolean
 182 _mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS)
 183 {
 184    GLubyte *dst;
 185    const GLubyte *tempImage = NULL;
 186    int i, j;
 187    int numxpixels, numypixels;
 188    const GLubyte *srcaddr;
 189    GLubyte srcpixels[4][4];
 190    GLubyte *blkaddr;
 191    GLint dstRowDiff, rgRowStride;
 192    mesa_format tempFormat;
 193    GLubyte *tempImageSlices[1];
 194
 195    assert(dstFormat == MESA_FORMAT_RG_RGTC2_UNORM ||
 196           dstFormat == MESA_FORMAT_LA_LATC2_UNORM);
 197
 198    if (baseInternalFormat == GL_RG)
 199       tempFormat = _mesa_little_endian() ? MESA_FORMAT_R8G8_UNORM
 200                                          : MESA_FORMAT_G8R8_UNORM;
 201    else
 202       tempFormat = _mesa_little_endian() ? MESA_FORMAT_L8A8_UNORM
 203                                          : MESA_FORMAT_A8L8_UNORM;
 204
 205    rgRowStride = 2 * srcWidth * sizeof(GLubyte);
 206    tempImage = malloc(srcWidth * srcHeight * 2 * sizeof(GLubyte));
 207    if (!tempImage)
 208       return GL_FALSE; /* out of memory */
 209    tempImageSlices[0] = (GLubyte *) tempImage;
 210    _mesa_texstore(ctx, dims,
 211                   baseInternalFormat,
 212                   tempFormat,
 213                   rgRowStride, tempImageSlices,
 214                   srcWidth, srcHeight, srcDepth,
 215                   srcFormat, srcType, srcAddr,
 216                   srcPacking);
 217
 218    dst = dstSlices[0];
 219
 220    blkaddr = dst;
 221    dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
 222    for (j = 0; j < srcHeight; j+=4) {
 223       if (srcHeight > j + 3) numypixels = 4;
 224       else numypixels = srcHeight - j;
 225       srcaddr = tempImage + j * srcWidth * 2;
 226       for (i = 0; i < srcWidth; i += 4) {
 227          if (srcWidth > i + 3) numxpixels = 4;
 228          else numxpixels = srcWidth - i;
 229          extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
 230          util_format_unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 231
 232          blkaddr += 8;
 233          extractsrc_u(srcpixels, (GLubyte *)srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
 234          util_format_unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 235
 236          blkaddr += 8;
 237
 238          srcaddr += numxpixels * 2;
 239       }
 240       blkaddr += dstRowDiff;
 241    }
 242
 243    free((void *) tempImage);
 244
 245    return GL_TRUE;
 246 }
 247
 248 GLboolean
 249 _mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS)
 250 {
 251    GLbyte *dst;
 252    const GLfloat *tempImage = NULL;
 253    int i, j;
 254    int numxpixels, numypixels;
 255    const GLfloat *srcaddr;
 256    GLbyte srcpixels[4][4];
 257    GLbyte *blkaddr;
 258    GLint dstRowDiff, rgRowStride;
 259    mesa_format tempFormat;
 260    GLfloat *tempImageSlices[1];
 261
 262    assert(dstFormat == MESA_FORMAT_RG_RGTC2_SNORM ||
 263           dstFormat == MESA_FORMAT_LA_LATC2_SNORM);
 264
 265    if (baseInternalFormat == GL_RG)
 266       tempFormat = MESA_FORMAT_RG_FLOAT32;
 267    else
 268       tempFormat = MESA_FORMAT_LA_FLOAT32;
 269
 270    rgRowStride = 2 * srcWidth * sizeof(GLfloat);
 271    tempImage = malloc(srcWidth * srcHeight * 2 * sizeof(GLfloat));
 272    if (!tempImage)
 273       return GL_FALSE; /* out of memory */
 274    tempImageSlices[0] = (GLfloat *) tempImage;
 275    _mesa_texstore(ctx, dims,
 276                   baseInternalFormat,
 277                   tempFormat,
 278                   rgRowStride, (GLubyte **)tempImageSlices,
 279                   srcWidth, srcHeight, srcDepth,
 280                   srcFormat, srcType, srcAddr,
 281                   srcPacking);
 282
 283    dst = (GLbyte *) dstSlices[0];
 284
 285    blkaddr = dst;
 286    dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
 287    for (j = 0; j < srcHeight; j += 4) {
 288       if (srcHeight > j + 3) numypixels = 4;
 289       else numypixels = srcHeight - j;
 290       srcaddr = tempImage + j * srcWidth * 2;
 291       for (i = 0; i < srcWidth; i += 4) {
 292          if (srcWidth > i + 3) numxpixels = 4;
 293          else numxpixels = srcWidth - i;
 294
 295          extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
 296          util_format_signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 297          blkaddr += 8;
 298
 299          extractsrc_s(srcpixels, srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
 300          util_format_signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
 301          blkaddr += 8;
 302
 303          srcaddr += numxpixels * 2;
 304
 305       }
 306       blkaddr += dstRowDiff;
 307    }
 308
 309    free((void *) tempImage);
 310
 311    return GL_TRUE;
 312 }
 313
 314 static void
 315 fetch_red_rgtc1(const GLubyte *map,
 316                 GLint rowStride, GLint i, GLint j, GLfloat *texel)
 317 {
 318    GLubyte red;
 319    util_format_unsigned_fetch_texel_rgtc(rowStride, map, i, j, &red, 1);
 320    texel[RCOMP] = UBYTE_TO_FLOAT(red);
 321    texel[GCOMP] = 0.0;
 322    texel[BCOMP] = 0.0;
 323    texel[ACOMP] = 1.0;
 324 }
 325
 326 static void
 327 fetch_l_latc1(const GLubyte *map,
 328               GLint rowStride, GLint i, GLint j, GLfloat *texel)
 329 {
 330    GLubyte red;
 331    util_format_unsigned_fetch_texel_rgtc(rowStride, map, i, j, &red, 1);
 332    texel[RCOMP] =
 333    texel[GCOMP] =
 334    texel[BCOMP] = UBYTE_TO_FLOAT(red);
 335    texel[ACOMP] = 1.0;
 336 }
 337
 338 static void
 339 fetch_signed_red_rgtc1(const GLubyte *map,
 340                        GLint rowStride, GLint i, GLint j, GLfloat *texel)
 341 {
 342    GLbyte red;
 343    util_format_signed_fetch_texel_rgtc(rowStride, (const GLbyte *) map,
 344                            i, j, &red, 1);
 345    texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
 346    texel[GCOMP] = 0.0;
 347    texel[BCOMP] = 0.0;
 348    texel[ACOMP] = 1.0;
 349 }
 350
 351 static void
 352 fetch_signed_l_latc1(const GLubyte *map,
 353                      GLint rowStride, GLint i, GLint j, GLfloat *texel)
 354 {
 355    GLbyte red;
 356    util_format_signed_fetch_texel_rgtc(rowStride, (GLbyte *) map,
 357                            i, j, &red, 1);
 358    texel[RCOMP] =
 359    texel[GCOMP] =
 360    texel[BCOMP] = BYTE_TO_FLOAT(red);
 361    texel[ACOMP] = 1.0;
 362 }
 363
 364 static void
 365 fetch_rg_rgtc2(const GLubyte *map,
 366                GLint rowStride, GLint i, GLint j, GLfloat *texel)
 367 {
 368    GLubyte red, green;
 369    util_format_unsigned_fetch_texel_rgtc(rowStride,
 370                              map,
 371                              i, j, &red, 2);
 372    util_format_unsigned_fetch_texel_rgtc(rowStride,
 373                              map + 8,
 374                              i, j, &green, 2);
 375    texel[RCOMP] = UBYTE_TO_FLOAT(red);
 376    texel[GCOMP] = UBYTE_TO_FLOAT(green);
 377    texel[BCOMP] = 0.0;
 378    texel[ACOMP] = 1.0;
 379 }
 380
 381 static void
 382 fetch_la_latc2(const GLubyte *map,
 383                GLint rowStride, GLint i, GLint j, GLfloat *texel)
 384 {
 385    GLubyte red, green;
 386    util_format_unsigned_fetch_texel_rgtc(rowStride,
 387                              map,
 388                              i, j, &red, 2);
 389    util_format_unsigned_fetch_texel_rgtc(rowStride,
 390                              map + 8,
 391                              i, j, &green, 2);
 392    texel[RCOMP] =
 393    texel[GCOMP] =
 394    texel[BCOMP] = UBYTE_TO_FLOAT(red);
 395    texel[ACOMP] = UBYTE_TO_FLOAT(green);
 396 }
 397
 398
 399 static void
 400 fetch_signed_rg_rgtc2(const GLubyte *map,
 401                       GLint rowStride, GLint i, GLint j, GLfloat *texel)
 402 {
 403    GLbyte red, green;
 404    util_format_signed_fetch_texel_rgtc(rowStride,
 405                            (GLbyte *) map,
 406                            i, j, &red, 2);
 407    util_format_signed_fetch_texel_rgtc(rowStride,
 408                            (GLbyte *) map + 8,
 409                            i, j, &green, 2);
 410    texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
 411    texel[GCOMP] = BYTE_TO_FLOAT_TEX(green);
 412    texel[BCOMP] = 0.0;
 413    texel[ACOMP] = 1.0;
 414 }
 415
 416
 417 static void
 418 fetch_signed_la_latc2(const GLubyte *map,
 419                       GLint rowStride, GLint i, GLint j, GLfloat *texel)
 420 {
 421    GLbyte red, green;
 422    util_format_signed_fetch_texel_rgtc(rowStride,
 423                            (GLbyte *) map,
 424                            i, j, &red, 2);
 425    util_format_signed_fetch_texel_rgtc(rowStride,
 426                            (GLbyte *) map + 8,
 427                            i, j, &green, 2);
 428    texel[RCOMP] =
 429    texel[GCOMP] =
 430    texel[BCOMP] = BYTE_TO_FLOAT_TEX(red);
 431    texel[ACOMP] = BYTE_TO_FLOAT_TEX(green);
 432 }
 433
 434
 435 compressed_fetch_func
 436 _mesa_get_compressed_rgtc_func(mesa_format format)
 437 {
 438    switch (format) {
 439    case MESA_FORMAT_R_RGTC1_UNORM:
 440       return fetch_red_rgtc1;
 441    case MESA_FORMAT_L_LATC1_UNORM:
 442       return fetch_l_latc1;
 443    case MESA_FORMAT_R_RGTC1_SNORM:
 444       return fetch_signed_red_rgtc1;
 445    case MESA_FORMAT_L_LATC1_SNORM:
 446       return fetch_signed_l_latc1;
 447    case MESA_FORMAT_RG_RGTC2_UNORM:
 448       return fetch_rg_rgtc2;
 449    case MESA_FORMAT_LA_LATC2_UNORM:
 450       return fetch_la_latc2;
 451    case MESA_FORMAT_RG_RGTC2_SNORM:
 452       return fetch_signed_rg_rgtc2;
 453    case MESA_FORMAT_LA_LATC2_SNORM:
 454       return fetch_signed_la_latc2;
 455    default:
 456       return NULL;
 457    }
 458 }