diff options
Diffstat (limited to 'src/3rdparty/libtiff/libtiff/tif_thunder.c')
-rw-r--r-- | src/3rdparty/libtiff/libtiff/tif_thunder.c | 281 |
1 files changed, 141 insertions, 140 deletions
diff --git a/src/3rdparty/libtiff/libtiff/tif_thunder.c b/src/3rdparty/libtiff/libtiff/tif_thunder.c index 3e703d8..1f97362 100644 --- a/src/3rdparty/libtiff/libtiff/tif_thunder.c +++ b/src/3rdparty/libtiff/libtiff/tif_thunder.c @@ -2,23 +2,23 @@ * Copyright (c) 1988-1997 Sam Leffler * Copyright (c) 1991-1997 Silicon Graphics, Inc. * - * Permission to use, copy, modify, distribute, and sell this software and + * Permission to use, copy, modify, distribute, and sell this software and * its documentation for any purpose is hereby granted without fee, provided * that (i) the above copyright notices and this permission notice appear in * all copies of the software and related documentation, and (ii) the names of * Sam Leffler and Silicon Graphics may not be used in any advertising or * publicity relating to the software without the specific, prior written * permission of Sam Leffler and Silicon Graphics. - * - * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, - * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY - * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. - * + * + * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, + * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, - * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF - * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF + * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ @@ -41,157 +41,158 @@ * or 3-bit delta values are used, with the deltas packed * into a single byte. */ -#define THUNDER_DATA 0x3f /* mask for 6-bit data */ -#define THUNDER_CODE 0xc0 /* mask for 2-bit code word */ +#define THUNDER_DATA 0x3f /* mask for 6-bit data */ +#define THUNDER_CODE 0xc0 /* mask for 2-bit code word */ /* code values */ -#define THUNDER_RUN 0x00 /* run of pixels w/ encoded count */ -#define THUNDER_2BITDELTAS 0x40 /* 3 pixels w/ encoded 2-bit deltas */ -#define DELTA2_SKIP 2 /* skip code for 2-bit deltas */ -#define THUNDER_3BITDELTAS 0x80 /* 2 pixels w/ encoded 3-bit deltas */ -#define DELTA3_SKIP 4 /* skip code for 3-bit deltas */ -#define THUNDER_RAW 0xc0 /* raw data encoded */ +#define THUNDER_RUN 0x00 /* run of pixels w/ encoded count */ +#define THUNDER_2BITDELTAS 0x40 /* 3 pixels w/ encoded 2-bit deltas */ +#define DELTA2_SKIP 2 /* skip code for 2-bit deltas */ +#define THUNDER_3BITDELTAS 0x80 /* 2 pixels w/ encoded 3-bit deltas */ +#define DELTA3_SKIP 4 /* skip code for 3-bit deltas */ +#define THUNDER_RAW 0xc0 /* raw data encoded */ -static const int twobitdeltas[4] = { 0, 1, 0, -1 }; -static const int threebitdeltas[8] = { 0, 1, 2, 3, 0, -3, -2, -1 }; +static const int twobitdeltas[4] = {0, 1, 0, -1}; +static const int threebitdeltas[8] = {0, 1, 2, 3, 0, -3, -2, -1}; -#define SETPIXEL(op, v) { \ - lastpixel = (v) & 0xf; \ - if ( npixels < maxpixels ) \ - { \ - if (npixels++ & 1) \ - *op++ |= lastpixel; \ - else \ - op[0] = (uint8_t) (lastpixel << 4); \ - } \ -} +#define SETPIXEL(op, v) \ + { \ + lastpixel = (v)&0xf; \ + if (npixels < maxpixels) \ + { \ + if (npixels++ & 1) \ + *op++ |= lastpixel; \ + else \ + op[0] = (uint8_t)(lastpixel << 4); \ + } \ + } -static int -ThunderSetupDecode(TIFF* tif) +static int ThunderSetupDecode(TIFF *tif) { - static const char module[] = "ThunderSetupDecode"; + static const char module[] = "ThunderSetupDecode"; - if( tif->tif_dir.td_bitspersample != 4 ) - { - TIFFErrorExt(tif->tif_clientdata, module, - "Wrong bitspersample value (%d), Thunder decoder only supports 4bits per sample.", - (int) tif->tif_dir.td_bitspersample ); - return 0; - } - + if (tif->tif_dir.td_bitspersample != 4) + { + TIFFErrorExtR(tif, module, + "Wrong bitspersample value (%d), Thunder decoder only " + "supports 4bits per sample.", + (int)tif->tif_dir.td_bitspersample); + return 0; + } - return (1); + return (1); } -static int -ThunderDecode(TIFF* tif, uint8_t* op, tmsize_t maxpixels) +static int ThunderDecode(TIFF *tif, uint8_t *op, tmsize_t maxpixels) { - static const char module[] = "ThunderDecode"; - register unsigned char *bp; - register tmsize_t cc; - unsigned int lastpixel; - tmsize_t npixels; + static const char module[] = "ThunderDecode"; + register unsigned char *bp; + register tmsize_t cc; + unsigned int lastpixel; + tmsize_t npixels; - bp = (unsigned char *)tif->tif_rawcp; - cc = tif->tif_rawcc; - lastpixel = 0; - npixels = 0; - while (cc > 0 && npixels < maxpixels) { - int n, delta; + bp = (unsigned char *)tif->tif_rawcp; + cc = tif->tif_rawcc; + lastpixel = 0; + npixels = 0; + while (cc > 0 && npixels < maxpixels) + { + int n, delta; - n = *bp++; - cc--; - switch (n & THUNDER_CODE) { - case THUNDER_RUN: /* pixel run */ - /* - * Replicate the last pixel n times, - * where n is the lower-order 6 bits. - */ - if (npixels & 1) { - op[0] |= lastpixel; - lastpixel = *op++; npixels++; n--; - } else - lastpixel |= lastpixel << 4; - npixels += n; - if (npixels < maxpixels) { - for (; n > 0; n -= 2) - *op++ = (uint8_t) lastpixel; - } - if (n == -1) - *--op &= 0xf0; - lastpixel &= 0xf; - break; - case THUNDER_2BITDELTAS: /* 2-bit deltas */ - if ((delta = ((n >> 4) & 3)) != DELTA2_SKIP) - SETPIXEL(op, (unsigned)((int)lastpixel + twobitdeltas[delta])); - if ((delta = ((n >> 2) & 3)) != DELTA2_SKIP) - SETPIXEL(op, (unsigned)((int)lastpixel + twobitdeltas[delta])); - if ((delta = (n & 3)) != DELTA2_SKIP) - SETPIXEL(op, (unsigned)((int)lastpixel + twobitdeltas[delta])); - break; - case THUNDER_3BITDELTAS: /* 3-bit deltas */ - if ((delta = ((n >> 3) & 7)) != DELTA3_SKIP) - SETPIXEL(op, (unsigned)((int)lastpixel + threebitdeltas[delta])); - if ((delta = (n & 7)) != DELTA3_SKIP) - SETPIXEL(op, (unsigned)((int)lastpixel + threebitdeltas[delta])); - break; - case THUNDER_RAW: /* raw data */ - SETPIXEL(op, n); - break; - } - } - tif->tif_rawcp = (uint8_t*) bp; - tif->tif_rawcc = cc; - if (npixels != maxpixels) { - TIFFErrorExt(tif->tif_clientdata, module, - "%s data at scanline %lu (%"PRIu64" != %"PRIu64")", - npixels < maxpixels ? "Not enough" : "Too much", - (unsigned long) tif->tif_row, - (uint64_t) npixels, - (uint64_t) maxpixels); - return (0); - } + n = *bp++; + cc--; + switch (n & THUNDER_CODE) + { + case THUNDER_RUN: /* pixel run */ + /* + * Replicate the last pixel n times, + * where n is the lower-order 6 bits. + */ + if (npixels & 1) + { + op[0] |= lastpixel; + lastpixel = *op++; + npixels++; + n--; + } + else + lastpixel |= lastpixel << 4; + npixels += n; + if (npixels < maxpixels) + { + for (; n > 0; n -= 2) + *op++ = (uint8_t)lastpixel; + } + if (n == -1) + *--op &= 0xf0; + lastpixel &= 0xf; + break; + case THUNDER_2BITDELTAS: /* 2-bit deltas */ + if ((delta = ((n >> 4) & 3)) != DELTA2_SKIP) + SETPIXEL(op, + (unsigned)((int)lastpixel + twobitdeltas[delta])); + if ((delta = ((n >> 2) & 3)) != DELTA2_SKIP) + SETPIXEL(op, + (unsigned)((int)lastpixel + twobitdeltas[delta])); + if ((delta = (n & 3)) != DELTA2_SKIP) + SETPIXEL(op, + (unsigned)((int)lastpixel + twobitdeltas[delta])); + break; + case THUNDER_3BITDELTAS: /* 3-bit deltas */ + if ((delta = ((n >> 3) & 7)) != DELTA3_SKIP) + SETPIXEL( + op, (unsigned)((int)lastpixel + threebitdeltas[delta])); + if ((delta = (n & 7)) != DELTA3_SKIP) + SETPIXEL( + op, (unsigned)((int)lastpixel + threebitdeltas[delta])); + break; + case THUNDER_RAW: /* raw data */ + SETPIXEL(op, n); + break; + } + } + tif->tif_rawcp = (uint8_t *)bp; + tif->tif_rawcc = cc; + if (npixels != maxpixels) + { + TIFFErrorExtR(tif, module, + "%s data at scanline %lu (%" PRIu64 " != %" PRIu64 ")", + npixels < maxpixels ? "Not enough" : "Too much", + (unsigned long)tif->tif_row, (uint64_t)npixels, + (uint64_t)maxpixels); + return (0); + } - return (1); + return (1); } -static int -ThunderDecodeRow(TIFF* tif, uint8_t* buf, tmsize_t occ, uint16_t s) +static int ThunderDecodeRow(TIFF *tif, uint8_t *buf, tmsize_t occ, uint16_t s) { - static const char module[] = "ThunderDecodeRow"; - uint8_t* row = buf; - - (void) s; - if (occ % tif->tif_scanlinesize) - { - TIFFErrorExt(tif->tif_clientdata, module, "Fractional scanlines cannot be read"); - return (0); - } - while (occ > 0) { - if (!ThunderDecode(tif, row, tif->tif_dir.td_imagewidth)) - return (0); - occ -= tif->tif_scanlinesize; - row += tif->tif_scanlinesize; - } - return (1); + static const char module[] = "ThunderDecodeRow"; + uint8_t *row = buf; + + (void)s; + if (occ % tif->tif_scanlinesize) + { + TIFFErrorExtR(tif, module, "Fractional scanlines cannot be read"); + return (0); + } + while (occ > 0) + { + if (!ThunderDecode(tif, row, tif->tif_dir.td_imagewidth)) + return (0); + occ -= tif->tif_scanlinesize; + row += tif->tif_scanlinesize; + } + return (1); } -int -TIFFInitThunderScan(TIFF* tif, int scheme) +int TIFFInitThunderScan(TIFF *tif, int scheme) { - (void) scheme; + (void)scheme; - tif->tif_setupdecode = ThunderSetupDecode; - tif->tif_decoderow = ThunderDecodeRow; - tif->tif_decodestrip = ThunderDecodeRow; - return (1); + tif->tif_setupdecode = ThunderSetupDecode; + tif->tif_decoderow = ThunderDecodeRow; + tif->tif_decodestrip = ThunderDecodeRow; + return (1); } #endif /* THUNDER_SUPPORT */ - -/* vim: set ts=8 sts=8 sw=8 noet: */ -/* - * Local Variables: - * mode: c - * c-basic-offset: 8 - * fill-column: 78 - * End: - */ |