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  1. /**************************************************************************
  2.  *
  3.  * Copyright (C) 2011 Red Hat Inc.
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining a
  6.  * copy of this software and associated documentation files (the "Software"),
  7.  * to deal in the Software without restriction, including without limitation
  8.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  9.  * and/or sell copies of the Software, and to permit persons to whom the
  10.  * Software is furnished to do so, subject to the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice shall be included
  13.  * in all copies or substantial portions of the Software.
  14.  *
  15.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19.  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20.  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21.  * OTHER DEALINGS IN THE SOFTWARE.
  22.  *
  23.  **************************************************************************/
  24.  
  25. #include <stdio.h>
  26. #include "u_math.h"
  27. #include "u_format.h"
  28. #include "u_format_rgtc.h"
  29.  
  30. static void u_format_unsigned_encode_rgtc_ubyte(uint8_t *blkaddr, uint8_t srccolors[4][4],
  31.                                                int numxpixels, int numypixels);
  32.  
  33. static void u_format_unsigned_fetch_texel_rgtc(unsigned srcRowStride, const uint8_t *pixdata,
  34.                                                unsigned i, unsigned j, uint8_t *value, unsigned comps);
  35.  
  36. static void u_format_signed_encode_rgtc_ubyte(int8_t *blkaddr, int8_t srccolors[4][4],
  37.                                              int numxpixels, int numypixels);
  38.  
  39. static void u_format_signed_fetch_texel_rgtc(unsigned srcRowStride, const int8_t *pixdata,
  40.                                                unsigned i, unsigned j, int8_t *value, unsigned comps);
  41.  
  42. void
  43. util_format_rgtc1_unorm_fetch_rgba_8unorm(uint8_t *dst, const uint8_t *src, unsigned i, unsigned j)
  44. {
  45.    u_format_unsigned_fetch_texel_rgtc(0, src, i, j, dst, 1);
  46.    dst[1] = 0;
  47.    dst[2] = 0;
  48.    dst[3] = 255;
  49. }
  50.  
  51. void
  52. util_format_rgtc1_unorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  53. {
  54.    const unsigned bw = 4, bh = 4, comps = 4;
  55.    unsigned x, y, i, j;
  56.    unsigned block_size = 8;
  57.  
  58.    for(y = 0; y < height; y += bh) {
  59.       const uint8_t *src = src_row;
  60.       for(x = 0; x < width; x += bw) {
  61.          for(j = 0; j < bh; ++j) {
  62.             for(i = 0; i < bw; ++i) {
  63.                uint8_t *dst = dst_row + (y + j)*dst_stride/sizeof(*dst_row) + (x + i)*comps;
  64.                u_format_unsigned_fetch_texel_rgtc(0, src, i, j, dst, 1);
  65.                dst[1] = 0;
  66.                dst[2] = 0;
  67.                dst[3] = 255;
  68.             }
  69.          }
  70.          src += block_size;
  71.       }
  72.       src_row += src_stride;
  73.    }
  74. }
  75.  
  76. void
  77. util_format_rgtc1_unorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row,
  78.                                          unsigned src_stride, unsigned width, unsigned height)
  79. {
  80.    const unsigned bw = 4, bh = 4, bytes_per_block = 8;
  81.    unsigned x, y, i, j;
  82.  
  83.    for(y = 0; y < height; y += bh) {
  84.       uint8_t *dst = dst_row;
  85.       for(x = 0; x < width; x += bw) {
  86.          uint8_t tmp[4][4];  /* [bh][bw][comps] */
  87.          for(j = 0; j < bh; ++j) {
  88.             for(i = 0; i < bw; ++i) {
  89.                tmp[j][i] = src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4];
  90.             }
  91.          }
  92.          u_format_unsigned_encode_rgtc_ubyte(dst, tmp, 4, 4);
  93.          dst += bytes_per_block;
  94.       }
  95.       dst_row += dst_stride / sizeof(*dst_row);
  96.    }
  97. }
  98.  
  99. void
  100. util_format_rgtc1_unorm_unpack_rgba_float(float *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  101. {
  102.    unsigned x, y, i, j;
  103.    int block_size = 8;
  104.    for(y = 0; y < height; y += 4) {
  105.       const uint8_t *src = src_row;
  106.       for(x = 0; x < width; x += 4) {
  107.          for(j = 0; j < 4; ++j) {
  108.             for(i = 0; i < 4; ++i) {
  109.                float *dst = dst_row + (y + j)*dst_stride/sizeof(*dst_row) + (x + i)*4;
  110.                uint8_t tmp_r;
  111.                u_format_unsigned_fetch_texel_rgtc(0, src, i, j, &tmp_r, 1);
  112.                dst[0] = ubyte_to_float(tmp_r);
  113.                dst[1] = 0.0;
  114.                dst[2] = 0.0;
  115.                dst[3] = 1.0;
  116.             }
  117.          }
  118.          src += block_size;
  119.       }
  120.       src_row += src_stride;
  121.    }
  122. }
  123.  
  124. void
  125. util_format_rgtc1_unorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride, const float *src_row, unsigned src_stride, unsigned width, unsigned height)
  126. {
  127.    const unsigned bw = 4, bh = 4, bytes_per_block = 8;
  128.    unsigned x, y, i, j;
  129.  
  130.    for(y = 0; y < height; y += bh) {
  131.       uint8_t *dst = dst_row;
  132.       for(x = 0; x < width; x += bw) {
  133.          uint8_t tmp[4][4];  /* [bh][bw][comps] */
  134.          for(j = 0; j < bh; ++j) {
  135.             for(i = 0; i < bw; ++i) {
  136.                tmp[j][i] = float_to_ubyte(src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4]);
  137.             }
  138.          }
  139.          u_format_unsigned_encode_rgtc_ubyte(dst, tmp, 4, 4);
  140.          dst += bytes_per_block;
  141.       }
  142.       dst_row += dst_stride / sizeof(*dst_row);
  143.    }
  144. }
  145.  
  146. void
  147. util_format_rgtc1_unorm_fetch_rgba_float(float *dst, const uint8_t *src, unsigned i, unsigned j)
  148. {
  149.    uint8_t tmp_r;
  150.    u_format_unsigned_fetch_texel_rgtc(0, src, i, j, &tmp_r, 1);
  151.    dst[0] = ubyte_to_float(tmp_r);
  152.    dst[1] = 0.0;
  153.    dst[2] = 0.0;
  154.    dst[3] = 1.0;
  155. }
  156.  
  157. void
  158. util_format_rgtc1_snorm_fetch_rgba_8unorm(uint8_t *dst, const uint8_t *src, unsigned i, unsigned j)
  159. {
  160.    fprintf(stderr,"%s\n", __func__);
  161. }
  162.  
  163. void
  164. util_format_rgtc1_snorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  165. {
  166.    fprintf(stderr,"%s\n", __func__);
  167. }
  168.  
  169. void
  170. util_format_rgtc1_snorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  171. {
  172.    fprintf(stderr,"%s\n", __func__);
  173. }
  174.  
  175. void
  176. util_format_rgtc1_snorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride, const float *src_row, unsigned src_stride, unsigned width, unsigned height)
  177. {
  178.    const unsigned bw = 4, bh = 4, bytes_per_block = 8;
  179.    unsigned x, y, i, j;
  180.  
  181.    for(y = 0; y < height; y += bh) {
  182.       int8_t *dst = (int8_t *)dst_row;
  183.       for(x = 0; x < width; x += bw) {
  184.          int8_t tmp[4][4];  /* [bh][bw][comps] */
  185.          for(j = 0; j < bh; ++j) {
  186.             for(i = 0; i < bw; ++i) {
  187.                tmp[j][i] = float_to_byte_tex(src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4]);
  188.             }
  189.          }
  190.          u_format_signed_encode_rgtc_ubyte(dst, tmp, 4, 4);
  191.          dst += bytes_per_block;
  192.       }
  193.       dst_row += dst_stride / sizeof(*dst_row);
  194.    }
  195. }
  196.  
  197. void
  198. util_format_rgtc1_snorm_unpack_rgba_float(float *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  199. {
  200.    unsigned x, y, i, j;
  201.    int block_size = 8;
  202.    for(y = 0; y < height; y += 4) {
  203.       const int8_t *src = (int8_t *)src_row;
  204.       for(x = 0; x < width; x += 4) {
  205.          for(j = 0; j < 4; ++j) {
  206.             for(i = 0; i < 4; ++i) {
  207.                float *dst = dst_row + (y + j)*dst_stride/sizeof(*dst_row) + (x + i)*4;
  208.                int8_t tmp_r;
  209.                u_format_signed_fetch_texel_rgtc(0, src, i, j, &tmp_r, 1);
  210.                dst[0] = byte_to_float_tex(tmp_r);
  211.                dst[1] = 0.0;
  212.                dst[2] = 0.0;
  213.                dst[3] = 1.0;
  214.             }
  215.          }
  216.          src += block_size;
  217.       }
  218.       src_row += src_stride;
  219.    }
  220. }
  221.  
  222. void
  223. util_format_rgtc1_snorm_fetch_rgba_float(float *dst, const uint8_t *src, unsigned i, unsigned j)
  224. {
  225.    int8_t tmp_r;
  226.    u_format_signed_fetch_texel_rgtc(0, (int8_t *)src, i, j, &tmp_r, 1);
  227.    dst[0] = byte_to_float_tex(tmp_r);
  228.    dst[1] = 0.0;
  229.    dst[2] = 0.0;
  230.    dst[3] = 1.0;
  231. }
  232.  
  233.  
  234. void
  235. util_format_rgtc2_unorm_fetch_rgba_8unorm(uint8_t *dst, const uint8_t *src, unsigned i, unsigned j)
  236. {
  237.    u_format_unsigned_fetch_texel_rgtc(0, src, i, j, dst, 2);
  238.    u_format_unsigned_fetch_texel_rgtc(0, src + 8, i, j, dst + 1, 2);
  239.    dst[2] = 0;
  240.    dst[3] = 255;
  241. }
  242.  
  243. void
  244. util_format_rgtc2_unorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  245. {
  246.    const unsigned bw = 4, bh = 4, comps = 4;
  247.    unsigned x, y, i, j;
  248.    unsigned block_size = 16;
  249.  
  250.    for(y = 0; y < height; y += bh) {
  251.       const uint8_t *src = src_row;
  252.       for(x = 0; x < width; x += bw) {
  253.          for(j = 0; j < bh; ++j) {
  254.             for(i = 0; i < bw; ++i) {
  255.                uint8_t *dst = dst_row + (y + j)*dst_stride/sizeof(*dst_row) + (x + i)*comps;
  256.                u_format_unsigned_fetch_texel_rgtc(0, src, i, j, dst, 2);
  257.                u_format_unsigned_fetch_texel_rgtc(0, src + 8, i, j, dst + 1, 2);
  258.                dst[2] = 0;
  259.                dst[3] = 255;
  260.             }
  261.          }
  262.          src += block_size;
  263.       }
  264.       src_row += src_stride;
  265.    }
  266. }
  267.  
  268. void
  269. util_format_rgtc2_unorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  270. {
  271.    const unsigned bw = 4, bh = 4, bytes_per_block = 16;
  272.    unsigned x, y, i, j;
  273.  
  274.    for(y = 0; y < height; y += bh) {
  275.       uint8_t *dst = dst_row;
  276.       for(x = 0; x < width; x += bw) {
  277.          uint8_t tmp_r[4][4];  /* [bh][bw] */
  278.          uint8_t tmp_g[4][4];  /* [bh][bw] */
  279.          for(j = 0; j < bh; ++j) {
  280.             for(i = 0; i < bw; ++i) {
  281.                tmp_r[j][i] = src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4];
  282.                tmp_g[j][i] = src_row[((y + j)*src_stride/sizeof(*src_row) + (x + i)*4) + 1];
  283.             }
  284.          }
  285.          u_format_unsigned_encode_rgtc_ubyte(dst, tmp_r, 4, 4);
  286.          u_format_unsigned_encode_rgtc_ubyte(dst + 8, tmp_g, 4, 4);
  287.          dst += bytes_per_block;
  288.       }
  289.       dst_row += dst_stride / sizeof(*dst_row);
  290.    }
  291. }
  292.  
  293. void
  294. util_format_rxtc2_unorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride, const float *src_row, unsigned src_stride, unsigned width, unsigned height, unsigned chan2off)
  295. {
  296.    const unsigned bw = 4, bh = 4, bytes_per_block = 16;
  297.    unsigned x, y, i, j;
  298.  
  299.    for(y = 0; y < height; y += bh) {
  300.       uint8_t *dst = dst_row;
  301.       for(x = 0; x < width; x += bw) {
  302.          uint8_t tmp_r[4][4];  /* [bh][bw][comps] */
  303.          uint8_t tmp_g[4][4];  /* [bh][bw][comps] */
  304.          for(j = 0; j < bh; ++j) {
  305.             for(i = 0; i < bw; ++i) {
  306.                tmp_r[j][i] = float_to_ubyte(src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4]);
  307.                tmp_g[j][i] = float_to_ubyte(src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4 + chan2off]);
  308.             }
  309.          }
  310.          u_format_unsigned_encode_rgtc_ubyte(dst, tmp_r, 4, 4);
  311.          u_format_unsigned_encode_rgtc_ubyte(dst + 8, tmp_g, 4, 4);
  312.          dst += bytes_per_block;
  313.       }
  314.       dst_row += dst_stride / sizeof(*dst_row);
  315.    }
  316. }
  317.  
  318. void
  319. util_format_rgtc2_unorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride, const float *src_row, unsigned src_stride, unsigned width, unsigned height)
  320. {
  321.    util_format_rxtc2_unorm_pack_rgba_float(dst_row, dst_stride, src_row, src_stride, width, height, 1);
  322. }
  323.  
  324. void
  325. util_format_rgtc2_unorm_unpack_rgba_float(float *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  326. {
  327.    unsigned x, y, i, j;
  328.    int block_size = 16;
  329.    for(y = 0; y < height; y += 4) {
  330.       const uint8_t *src = src_row;
  331.       for(x = 0; x < width; x += 4) {
  332.          for(j = 0; j < 4; ++j) {
  333.             for(i = 0; i < 4; ++i) {
  334.                float *dst = dst_row + (y + j)*dst_stride/sizeof(*dst_row) + (x + i)*4;
  335.                uint8_t tmp_r, tmp_g;
  336.                u_format_unsigned_fetch_texel_rgtc(0, src, i, j, &tmp_r, 2);
  337.                u_format_unsigned_fetch_texel_rgtc(0, src + 8, i, j, &tmp_g, 2);
  338.                dst[0] = ubyte_to_float(tmp_r);
  339.                dst[1] = ubyte_to_float(tmp_g);
  340.                dst[2] = 0.0;
  341.                dst[3] = 1.0;
  342.             }
  343.          }
  344.          src += block_size;
  345.       }
  346.       src_row += src_stride;
  347.    }
  348. }
  349.  
  350. void
  351. util_format_rgtc2_unorm_fetch_rgba_float(float *dst, const uint8_t *src, unsigned i, unsigned j)
  352. {
  353.    uint8_t tmp_r, tmp_g;
  354.    u_format_unsigned_fetch_texel_rgtc(0, src, i, j, &tmp_r, 2);
  355.    u_format_unsigned_fetch_texel_rgtc(0, src + 8, i, j, &tmp_g, 2);
  356.    dst[0] = ubyte_to_float(tmp_r);
  357.    dst[1] = ubyte_to_float(tmp_g);
  358.    dst[2] = 0.0;
  359.    dst[3] = 1.0;
  360. }
  361.  
  362.  
  363. void
  364. util_format_rgtc2_snorm_fetch_rgba_8unorm(uint8_t *dst, const uint8_t *src, unsigned i, unsigned j)
  365. {
  366.    fprintf(stderr,"%s\n", __func__);
  367. }
  368.  
  369. void
  370. util_format_rgtc2_snorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  371. {
  372.    fprintf(stderr,"%s\n", __func__);
  373. }
  374.  
  375. void
  376. util_format_rgtc2_snorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  377. {
  378.    fprintf(stderr,"%s\n", __func__);
  379. }
  380.  
  381. void
  382. util_format_rgtc2_snorm_unpack_rgba_float(float *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  383. {
  384.    unsigned x, y, i, j;
  385.    int block_size = 16;
  386.    for(y = 0; y < height; y += 4) {
  387.       const int8_t *src = (int8_t *)src_row;
  388.       for(x = 0; x < width; x += 4) {
  389.          for(j = 0; j < 4; ++j) {
  390.             for(i = 0; i < 4; ++i) {
  391.                float *dst = dst_row + (y + j)*dst_stride/sizeof(*dst_row) + (x + i)*4;
  392.                int8_t tmp_r, tmp_g;
  393.                u_format_signed_fetch_texel_rgtc(0, src, i, j, &tmp_r, 2);
  394.                u_format_signed_fetch_texel_rgtc(0, src + 8, i, j, &tmp_g, 2);
  395.                dst[0] = byte_to_float_tex(tmp_r);
  396.                dst[1] = byte_to_float_tex(tmp_g);
  397.                dst[2] = 0.0;
  398.                dst[3] = 1.0;
  399.             }
  400.          }
  401.          src += block_size;
  402.       }
  403.       src_row += src_stride;
  404.    }
  405. }
  406.  
  407. void
  408. util_format_rxtc2_snorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride, const float *src_row, unsigned src_stride, unsigned width, unsigned height, unsigned chan2off)
  409. {
  410.    const unsigned bw = 4, bh = 4, bytes_per_block = 16;
  411.    unsigned x, y, i, j;
  412.  
  413.    for(y = 0; y < height; y += bh) {
  414.       int8_t *dst = (int8_t *)dst_row;
  415.       for(x = 0; x < width; x += bw) {
  416.          int8_t tmp_r[4][4];  /* [bh][bw][comps] */
  417.          int8_t tmp_g[4][4];  /* [bh][bw][comps] */
  418.          for(j = 0; j < bh; ++j) {
  419.             for(i = 0; i < bw; ++i) {
  420.                tmp_r[j][i] = float_to_byte_tex(src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4]);
  421.                tmp_g[j][i] = float_to_byte_tex(src_row[(y + j)*src_stride/sizeof(*src_row) + (x + i)*4 + chan2off]);
  422.             }
  423.          }
  424.          u_format_signed_encode_rgtc_ubyte(dst, tmp_r, 4, 4);
  425.          u_format_signed_encode_rgtc_ubyte(dst + 8, tmp_g, 4, 4);
  426.          dst += bytes_per_block;
  427.       }
  428.       dst_row += dst_stride / sizeof(*dst_row);
  429.    }
  430. }
  431.  
  432. void
  433. util_format_rgtc2_snorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride, const float *src_row, unsigned src_stride, unsigned width, unsigned height)
  434. {
  435.    util_format_rxtc2_snorm_pack_rgba_float(dst_row, dst_stride, src_row, src_stride, width, height, 1);
  436. }
  437.  
  438. void
  439. util_format_rgtc2_snorm_fetch_rgba_float(float *dst, const uint8_t *src, unsigned i, unsigned j)
  440. {
  441.    int8_t tmp_r, tmp_g;
  442.    u_format_signed_fetch_texel_rgtc(0, (int8_t *)src, i, j, &tmp_r, 2);
  443.    u_format_signed_fetch_texel_rgtc(0, (int8_t *)src + 8, i, j, &tmp_g, 2);
  444.    dst[0] = byte_to_float_tex(tmp_r);
  445.    dst[1] = byte_to_float_tex(tmp_g);
  446.    dst[2] = 0.0;
  447.    dst[3] = 1.0;
  448. }
  449.  
  450.  
  451. #define TAG(x) u_format_unsigned_##x
  452. #define TYPE uint8_t
  453. #define T_MIN 0
  454. #define T_MAX 255
  455.  
  456. #include "texcompress_rgtc_tmp.h"
  457.  
  458. #undef TYPE
  459. #undef TAG
  460. #undef T_MIN
  461. #undef T_MAX
  462.  
  463.  
  464. #define TAG(x) u_format_signed_##x
  465. #define TYPE int8_t
  466. #define T_MIN (int8_t)-128
  467. #define T_MAX (int8_t)127
  468.  
  469. #include "texcompress_rgtc_tmp.h"
  470.  
  471. #undef TYPE
  472. #undef TAG
  473. #undef T_MIN
  474. #undef T_MAX
  475.