From d479dd1aab1c1cb907932c6595b0ef33523fc797 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Fri, 6 Nov 2015 07:14:47 +0100 Subject: Imported Upstream version 1.8.3 --- tiff/libtiff/tif_thunder.c | 207 --------------------------------------------- 1 file changed, 207 deletions(-) delete mode 100755 tiff/libtiff/tif_thunder.c (limited to 'tiff/libtiff/tif_thunder.c') diff --git a/tiff/libtiff/tif_thunder.c b/tiff/libtiff/tif_thunder.c deleted file mode 100755 index 390891c..0000000 --- a/tiff/libtiff/tif_thunder.c +++ /dev/null @@ -1,207 +0,0 @@ -/* $Id: tif_thunder.c,v 1.12 2011-04-02 20:54:09 bfriesen Exp $ */ - -/* - * Copyright (c) 1988-1997 Sam Leffler - * Copyright (c) 1991-1997 Silicon Graphics, Inc. - * - * 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. - * - * 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 - * OF THIS SOFTWARE. - */ - -#include "tiffiop.h" -#include -#ifdef THUNDER_SUPPORT -/* - * TIFF Library. - * - * ThunderScan 4-bit Compression Algorithm Support - */ - -/* - * ThunderScan uses an encoding scheme designed for - * 4-bit pixel values. Data is encoded in bytes, with - * each byte split into a 2-bit code word and a 6-bit - * data value. The encoding gives raw data, runs of - * pixels, or pixel values encoded as a delta from the - * previous pixel value. For the latter, either 2-bit - * 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 */ -/* 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 */ - -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) (lastpixel << 4); \ - } \ -} - -static int -ThunderSetupDecode(TIFF* tif) -{ - 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; - } - - - return (1); -} - -static int -ThunderDecode(TIFF* tif, uint8* op, tmsize_t maxpixels) -{ - 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; - - 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) lastpixel; - } - if (n == -1) - *--op &= 0xf0; - lastpixel &= 0xf; - break; - case THUNDER_2BITDELTAS: /* 2-bit deltas */ - if ((delta = ((n >> 4) & 3)) != DELTA2_SKIP) - SETPIXEL(op, lastpixel + twobitdeltas[delta]); - if ((delta = ((n >> 2) & 3)) != DELTA2_SKIP) - SETPIXEL(op, lastpixel + twobitdeltas[delta]); - if ((delta = (n & 3)) != DELTA2_SKIP) - SETPIXEL(op, lastpixel + twobitdeltas[delta]); - break; - case THUNDER_3BITDELTAS: /* 3-bit deltas */ - if ((delta = ((n >> 3) & 7)) != DELTA3_SKIP) - SETPIXEL(op, lastpixel + threebitdeltas[delta]); - if ((delta = (n & 7)) != DELTA3_SKIP) - SETPIXEL(op, lastpixel + threebitdeltas[delta]); - break; - case THUNDER_RAW: /* raw data */ - SETPIXEL(op, n); - break; - } - } - tif->tif_rawcp = (uint8*) bp; - tif->tif_rawcc = cc; - if (npixels != maxpixels) { -#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) - TIFFErrorExt(tif->tif_clientdata, module, - "%s data at scanline %lu (%I64u != %I64u)", - npixels < maxpixels ? "Not enough" : "Too much", - (unsigned long) tif->tif_row, - (unsigned __int64) npixels, - (unsigned __int64) maxpixels); -#else - TIFFErrorExt(tif->tif_clientdata, module, - "%s data at scanline %lu (%llu != %llu)", - npixels < maxpixels ? "Not enough" : "Too much", - (unsigned long) tif->tif_row, - (unsigned long long) npixels, - (unsigned long long) maxpixels); -#endif - return (0); - } - - return (1); -} - -static int -ThunderDecodeRow(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) -{ - static const char module[] = "ThunderDecodeRow"; - uint8* 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); -} - -int -TIFFInitThunderScan(TIFF* tif, int scheme) -{ - (void) scheme; - - 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: - */ -- cgit v1.2.3