1084 lines
36 KiB
C
1084 lines
36 KiB
C
/* $Id: tif_read.c,v 1.40 2012-06-01 00:55:09 fwarmerdam Exp $ */
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/*
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* Copyright (c) 1988-1997 Sam Leffler
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* Copyright (c) 1991-1997 Silicon Graphics, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that (i) the above copyright notices and this permission notice appear in
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* all copies of the software and related documentation, and (ii) the names of
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* Sam Leffler and Silicon Graphics may not be used in any advertising or
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* publicity relating to the software without the specific, prior written
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* permission of Sam Leffler and Silicon Graphics.
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*
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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/*
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* TIFF Library.
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* Scanline-oriented Read Support
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*/
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#include "tiffiop.h"
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#include <stdio.h>
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int TIFFFillStrip(TIFF* tif, uint32 strip);
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int TIFFFillTile(TIFF* tif, uint32 tile);
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static int TIFFStartStrip(TIFF* tif, uint32 strip);
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static int TIFFStartTile(TIFF* tif, uint32 tile);
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static int TIFFCheckRead(TIFF*, int);
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static tmsize_t
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TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size,const char* module);
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#define NOSTRIP ((uint32)(-1)) /* undefined state */
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#define NOTILE ((uint32)(-1)) /* undefined state */
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static int
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TIFFFillStripPartial( TIFF *tif, int strip, tmsize_t read_ahead, int restart )
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{
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static const char module[] = "TIFFFillStripPartial";
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register TIFFDirectory *td = &tif->tif_dir;
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uint64 unused_data;
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uint64 read_offset;
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tmsize_t cc, to_read;
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tmsize_t bytecountm;
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if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
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return 0;
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/*
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* Expand raw data buffer, if needed, to hold data
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* strip coming from file (perhaps should set upper
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* bound on the size of a buffer we'll use?).
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*/
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bytecountm=(tmsize_t) td->td_stripbytecount[strip];
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if (read_ahead*2 > tif->tif_rawdatasize) {
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assert( restart );
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tif->tif_curstrip = NOSTRIP;
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if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
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TIFFErrorExt(tif->tif_clientdata, module,
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"Data buffer too small to hold part of strip %lu",
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(unsigned long) strip);
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return (0);
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}
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if (!TIFFReadBufferSetup(tif, 0, read_ahead*2))
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return (0);
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}
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if( restart )
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{
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tif->tif_rawdataloaded = 0;
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tif->tif_rawdataoff = 0;
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}
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/*
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** If we are reading more data, move any unused data to the
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** start of the buffer.
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*/
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if( tif->tif_rawdataloaded > 0 )
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unused_data = tif->tif_rawdataloaded - (tif->tif_rawcp - tif->tif_rawdata);
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else
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unused_data = 0;
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if( unused_data > 0 )
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{
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assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
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memmove( tif->tif_rawdata, tif->tif_rawcp, unused_data );
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}
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/*
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** Seek to the point in the file where more data should be read.
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*/
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read_offset = td->td_stripoffset[strip]
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+ tif->tif_rawdataoff + tif->tif_rawdataloaded;
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if (!SeekOK(tif, read_offset)) {
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TIFFErrorExt(tif->tif_clientdata, module,
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"Seek error at scanline %lu, strip %lu",
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(unsigned long) tif->tif_row, (unsigned long) strip);
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return 0;
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}
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/*
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** How much do we want to read?
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*/
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to_read = tif->tif_rawdatasize - unused_data;
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if( (uint64) to_read > td->td_stripbytecount[strip]
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- tif->tif_rawdataoff - tif->tif_rawdataloaded )
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{
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to_read = td->td_stripbytecount[strip]
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- tif->tif_rawdataoff - tif->tif_rawdataloaded;
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}
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assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
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cc = TIFFReadFile(tif, tif->tif_rawdata + unused_data, to_read);
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if (cc != to_read) {
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#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
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TIFFErrorExt(tif->tif_clientdata, module,
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"Read error at scanline %lu; got %I64u bytes, expected %I64u",
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(unsigned long) tif->tif_row,
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(unsigned __int64) cc,
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(unsigned __int64) to_read);
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#else
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TIFFErrorExt(tif->tif_clientdata, module,
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"Read error at scanline %lu; got %llu bytes, expected %llu",
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(unsigned long) tif->tif_row,
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(unsigned long long) cc,
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(unsigned long long) to_read);
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#endif
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return 0;
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}
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tif->tif_rawdataoff = tif->tif_rawdataoff + tif->tif_rawdataloaded - unused_data ;
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tif->tif_rawdataloaded = unused_data + to_read;
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tif->tif_rawcp = tif->tif_rawdata;
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if (!isFillOrder(tif, td->td_fillorder) &&
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(tif->tif_flags & TIFF_NOBITREV) == 0) {
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assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
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TIFFReverseBits(tif->tif_rawdata + unused_data, to_read );
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}
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/*
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** When starting a strip from the beginning we need to
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** restart the decoder.
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*/
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if( restart )
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return TIFFStartStrip(tif, strip);
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else
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return 1;
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}
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/*
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* Seek to a random row+sample in a file.
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*
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* Only used by TIFFReadScanline, and is only used on
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* strip organized files. We do some tricky stuff to try
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* and avoid reading the whole compressed raw data for big
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* strips.
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*/
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static int
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TIFFSeek(TIFF* tif, uint32 row, uint16 sample )
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{
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register TIFFDirectory *td = &tif->tif_dir;
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uint32 strip;
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int whole_strip;
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tmsize_t read_ahead = 0;
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/*
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** Establish what strip we are working from.
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*/
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if (row >= td->td_imagelength) { /* out of range */
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
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"%lu: Row out of range, max %lu",
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(unsigned long) row,
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(unsigned long) td->td_imagelength);
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return (0);
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}
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if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
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if (sample >= td->td_samplesperpixel) {
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
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"%lu: Sample out of range, max %lu",
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(unsigned long) sample, (unsigned long) td->td_samplesperpixel);
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return (0);
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}
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strip = (uint32)sample*td->td_stripsperimage + row/td->td_rowsperstrip;
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} else
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strip = row / td->td_rowsperstrip;
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/*
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* Do we want to treat this strip as one whole chunk or
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* read it a few lines at a time?
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*/
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#if defined(CHUNKY_STRIP_READ_SUPPORT)
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if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
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return 0;
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whole_strip = tif->tif_dir.td_stripbytecount[strip] < 10
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|| isMapped(tif);
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#else
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whole_strip = 1;
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#endif
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if( !whole_strip )
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{
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read_ahead = tif->tif_scanlinesize * 16 + 5000;
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}
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/*
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* If we haven't loaded this strip, do so now, possibly
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* only reading the first part.
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*/
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if (strip != tif->tif_curstrip) { /* different strip, refill */
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if( whole_strip )
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{
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if (!TIFFFillStrip(tif, strip))
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return (0);
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}
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else
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{
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if( !TIFFFillStripPartial(tif,strip,read_ahead,1) )
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return 0;
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}
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}
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/*
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** If we already have some data loaded, do we need to read some more?
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*/
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else if( !whole_strip )
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{
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if( ((tif->tif_rawdata + tif->tif_rawdataloaded) - tif->tif_rawcp) < read_ahead
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&& (uint64) tif->tif_rawdataoff+tif->tif_rawdataloaded < td->td_stripbytecount[strip] )
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{
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if( !TIFFFillStripPartial(tif,strip,read_ahead,0) )
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return 0;
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}
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}
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if (row < tif->tif_row) {
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/*
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* Moving backwards within the same strip: backup
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* to the start and then decode forward (below).
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*
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* NB: If you're planning on lots of random access within a
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* strip, it's better to just read and decode the entire
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* strip, and then access the decoded data in a random fashion.
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*/
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if( tif->tif_rawdataoff != 0 )
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{
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if( !TIFFFillStripPartial(tif,strip,read_ahead,1) )
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return 0;
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}
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else
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{
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if (!TIFFStartStrip(tif, strip))
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return (0);
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}
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}
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if (row != tif->tif_row) {
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/*
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* Seek forward to the desired row.
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*/
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/* TODO: Will this really work with partial buffers? */
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if (!(*tif->tif_seek)(tif, row - tif->tif_row))
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return (0);
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tif->tif_row = row;
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}
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return (1);
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}
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int
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TIFFReadScanline(TIFF* tif, void* buf, uint32 row, uint16 sample)
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{
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int e;
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if (!TIFFCheckRead(tif, 0))
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return (-1);
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if( (e = TIFFSeek(tif, row, sample)) != 0) {
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/*
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* Decompress desired row into user buffer.
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*/
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e = (*tif->tif_decoderow)
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(tif, (uint8*) buf, tif->tif_scanlinesize, sample);
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/* we are now poised at the beginning of the next row */
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tif->tif_row = row + 1;
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if (e)
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(*tif->tif_postdecode)(tif, (uint8*) buf,
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tif->tif_scanlinesize);
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}
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return (e > 0 ? 1 : -1);
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}
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/*
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* Read a strip of data and decompress the specified
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* amount into the user-supplied buffer.
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*/
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tmsize_t
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TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size)
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{
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static const char module[] = "TIFFReadEncodedStrip";
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TIFFDirectory *td = &tif->tif_dir;
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uint32 rowsperstrip;
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uint32 stripsperplane;
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uint32 stripinplane;
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uint16 plane;
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uint32 rows;
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tmsize_t stripsize;
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if (!TIFFCheckRead(tif,0))
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return((tmsize_t)(-1));
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if (strip>=td->td_nstrips)
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{
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TIFFErrorExt(tif->tif_clientdata,module,
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"%lu: Strip out of range, max %lu",(unsigned long)strip,
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(unsigned long)td->td_nstrips);
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return((tmsize_t)(-1));
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}
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/*
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* Calculate the strip size according to the number of
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* rows in the strip (check for truncated last strip on any
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* of the separations).
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*/
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rowsperstrip=td->td_rowsperstrip;
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if (rowsperstrip>td->td_imagelength)
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rowsperstrip=td->td_imagelength;
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stripsperplane=((td->td_imagelength+rowsperstrip-1)/rowsperstrip);
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stripinplane=(strip%stripsperplane);
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plane=(strip/stripsperplane);
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rows=td->td_imagelength-stripinplane*rowsperstrip;
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if (rows>rowsperstrip)
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rows=rowsperstrip;
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stripsize=TIFFVStripSize(tif,rows);
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if (stripsize==0)
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return((tmsize_t)(-1));
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if ((size!=(tmsize_t)(-1))&&(size<stripsize))
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stripsize=size;
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if (!TIFFFillStrip(tif,strip))
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return((tmsize_t)(-1));
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if ((*tif->tif_decodestrip)(tif,buf,stripsize,plane)<=0)
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return((tmsize_t)(-1));
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(*tif->tif_postdecode)(tif,buf,stripsize);
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return(stripsize);
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}
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static tmsize_t
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TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size,
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const char* module)
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{
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TIFFDirectory *td = &tif->tif_dir;
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if (!_TIFFFillStriles( tif ))
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return ((tmsize_t)(-1));
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assert((tif->tif_flags&TIFF_NOREADRAW)==0);
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if (!isMapped(tif)) {
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tmsize_t cc;
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if (!SeekOK(tif, td->td_stripoffset[strip])) {
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TIFFErrorExt(tif->tif_clientdata, module,
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"Seek error at scanline %lu, strip %lu",
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(unsigned long) tif->tif_row, (unsigned long) strip);
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return ((tmsize_t)(-1));
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}
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cc = TIFFReadFile(tif, buf, size);
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if (cc != size) {
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#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
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TIFFErrorExt(tif->tif_clientdata, module,
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"Read error at scanline %lu; got %I64u bytes, expected %I64u",
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(unsigned long) tif->tif_row,
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(unsigned __int64) cc,
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(unsigned __int64) size);
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#else
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TIFFErrorExt(tif->tif_clientdata, module,
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"Read error at scanline %lu; got %llu bytes, expected %llu",
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(unsigned long) tif->tif_row,
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(unsigned long long) cc,
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(unsigned long long) size);
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#endif
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return ((tmsize_t)(-1));
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}
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} else {
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tmsize_t ma,mb;
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tmsize_t n;
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ma=(tmsize_t)td->td_stripoffset[strip];
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mb=ma+size;
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if (((uint64)ma!=td->td_stripoffset[strip])||(ma>tif->tif_size))
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n=0;
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else if ((mb<ma)||(mb<size)||(mb>tif->tif_size))
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n=tif->tif_size-ma;
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else
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n=size;
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if (n!=size) {
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#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
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TIFFErrorExt(tif->tif_clientdata, module,
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"Read error at scanline %lu, strip %lu; got %I64u bytes, expected %I64u",
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(unsigned long) tif->tif_row,
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(unsigned long) strip,
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(unsigned __int64) n,
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(unsigned __int64) size);
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#else
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TIFFErrorExt(tif->tif_clientdata, module,
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"Read error at scanline %lu, strip %lu; got %llu bytes, expected %llu",
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(unsigned long) tif->tif_row,
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(unsigned long) strip,
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(unsigned long long) n,
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(unsigned long long) size);
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#endif
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return ((tmsize_t)(-1));
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}
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_TIFFmemcpy(buf, tif->tif_base + ma,
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size);
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}
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return (size);
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}
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/*
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* Read a strip of data from the file.
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*/
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tmsize_t
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TIFFReadRawStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size)
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{
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static const char module[] = "TIFFReadRawStrip";
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TIFFDirectory *td = &tif->tif_dir;
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uint64 bytecount;
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tmsize_t bytecountm;
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if (!TIFFCheckRead(tif, 0))
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return ((tmsize_t)(-1));
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if (strip >= td->td_nstrips) {
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TIFFErrorExt(tif->tif_clientdata, module,
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"%lu: Strip out of range, max %lu",
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(unsigned long) strip,
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(unsigned long) td->td_nstrips);
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return ((tmsize_t)(-1));
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}
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if (tif->tif_flags&TIFF_NOREADRAW)
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{
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TIFFErrorExt(tif->tif_clientdata, module,
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"Compression scheme does not support access to raw uncompressed data");
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return ((tmsize_t)(-1));
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}
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bytecount = td->td_stripbytecount[strip];
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if (bytecount <= 0) {
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#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
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TIFFErrorExt(tif->tif_clientdata, module,
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"%I64u: Invalid strip byte count, strip %lu",
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(unsigned __int64) bytecount,
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(unsigned long) strip);
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#else
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TIFFErrorExt(tif->tif_clientdata, module,
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"%llu: Invalid strip byte count, strip %lu",
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(unsigned long long) bytecount,
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(unsigned long) strip);
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#endif
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return ((tmsize_t)(-1));
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}
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bytecountm = (tmsize_t)bytecount;
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if ((uint64)bytecountm!=bytecount) {
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TIFFErrorExt(tif->tif_clientdata, module, "Integer overflow");
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return ((tmsize_t)(-1));
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}
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if (size != (tmsize_t)(-1) && size < bytecountm)
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bytecountm = size;
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return (TIFFReadRawStrip1(tif, strip, buf, bytecountm, module));
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}
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/*
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* Read the specified strip and setup for decoding. The data buffer is
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* expanded, as necessary, to hold the strip's data.
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*/
|
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int
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TIFFFillStrip(TIFF* tif, uint32 strip)
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{
|
|
static const char module[] = "TIFFFillStrip";
|
|
TIFFDirectory *td = &tif->tif_dir;
|
|
|
|
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
|
|
return 0;
|
|
|
|
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
|
|
{
|
|
uint64 bytecount = td->td_stripbytecount[strip];
|
|
if (bytecount <= 0) {
|
|
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Invalid strip byte count %I64u, strip %lu",
|
|
(unsigned __int64) bytecount,
|
|
(unsigned long) strip);
|
|
#else
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Invalid strip byte count %llu, strip %lu",
|
|
(unsigned long long) bytecount,
|
|
(unsigned long) strip);
|
|
#endif
|
|
return (0);
|
|
}
|
|
if (isMapped(tif) &&
|
|
(isFillOrder(tif, td->td_fillorder)
|
|
|| (tif->tif_flags & TIFF_NOBITREV))) {
|
|
/*
|
|
* The image is mapped into memory and we either don't
|
|
* need to flip bits or the compression routine is
|
|
* going to handle this operation itself. In this
|
|
* case, avoid copying the raw data and instead just
|
|
* reference the data from the memory mapped file
|
|
* image. This assumes that the decompression
|
|
* routines do not modify the contents of the raw data
|
|
* buffer (if they try to, the application will get a
|
|
* fault since the file is mapped read-only).
|
|
*/
|
|
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
|
|
_TIFFfree(tif->tif_rawdata);
|
|
tif->tif_rawdata = NULL;
|
|
tif->tif_rawdatasize = 0;
|
|
}
|
|
tif->tif_flags &= ~TIFF_MYBUFFER;
|
|
/*
|
|
* We must check for overflow, potentially causing
|
|
* an OOB read. Instead of simple
|
|
*
|
|
* td->td_stripoffset[strip]+bytecount > tif->tif_size
|
|
*
|
|
* comparison (which can overflow) we do the following
|
|
* two comparisons:
|
|
*/
|
|
if (bytecount > (uint64)tif->tif_size ||
|
|
td->td_stripoffset[strip] > (uint64)tif->tif_size - bytecount) {
|
|
/*
|
|
* This error message might seem strange, but
|
|
* it's what would happen if a read were done
|
|
* instead.
|
|
*/
|
|
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
|
|
"Read error on strip %lu; "
|
|
"got %I64u bytes, expected %I64u",
|
|
(unsigned long) strip,
|
|
(unsigned __int64) tif->tif_size - td->td_stripoffset[strip],
|
|
(unsigned __int64) bytecount);
|
|
#else
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
|
|
"Read error on strip %lu; "
|
|
"got %llu bytes, expected %llu",
|
|
(unsigned long) strip,
|
|
(unsigned long long) tif->tif_size - td->td_stripoffset[strip],
|
|
(unsigned long long) bytecount);
|
|
#endif
|
|
tif->tif_curstrip = NOSTRIP;
|
|
return (0);
|
|
}
|
|
tif->tif_rawdatasize = (tmsize_t)bytecount;
|
|
tif->tif_rawdata = tif->tif_base + (tmsize_t)td->td_stripoffset[strip];
|
|
tif->tif_rawdataoff = 0;
|
|
tif->tif_rawdataloaded = (tmsize_t) bytecount;
|
|
|
|
/*
|
|
* When we have tif_rawdata reference directly into the memory mapped file
|
|
* we need to be pretty careful about how we use the rawdata. It is not
|
|
* a general purpose working buffer as it normally otherwise is. So we
|
|
* keep track of this fact to avoid using it improperly.
|
|
*/
|
|
tif->tif_flags |= TIFF_BUFFERMMAP;
|
|
} else {
|
|
/*
|
|
* Expand raw data buffer, if needed, to hold data
|
|
* strip coming from file (perhaps should set upper
|
|
* bound on the size of a buffer we'll use?).
|
|
*/
|
|
tmsize_t bytecountm;
|
|
bytecountm=(tmsize_t)bytecount;
|
|
if ((uint64)bytecountm!=bytecount)
|
|
{
|
|
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
|
|
return(0);
|
|
}
|
|
if (bytecountm > tif->tif_rawdatasize) {
|
|
tif->tif_curstrip = NOSTRIP;
|
|
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Data buffer too small to hold strip %lu",
|
|
(unsigned long) strip);
|
|
return (0);
|
|
}
|
|
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
|
|
return (0);
|
|
}
|
|
if (tif->tif_flags&TIFF_BUFFERMMAP) {
|
|
tif->tif_curstrip = NOSTRIP;
|
|
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
|
|
return (0);
|
|
}
|
|
if (TIFFReadRawStrip1(tif, strip, tif->tif_rawdata,
|
|
bytecountm, module) != bytecountm)
|
|
return (0);
|
|
|
|
tif->tif_rawdataoff = 0;
|
|
tif->tif_rawdataloaded = bytecountm;
|
|
|
|
if (!isFillOrder(tif, td->td_fillorder) &&
|
|
(tif->tif_flags & TIFF_NOBITREV) == 0)
|
|
TIFFReverseBits(tif->tif_rawdata, bytecountm);
|
|
}
|
|
}
|
|
return (TIFFStartStrip(tif, strip));
|
|
}
|
|
|
|
/*
|
|
* Tile-oriented Read Support
|
|
* Contributed by Nancy Cam (Silicon Graphics).
|
|
*/
|
|
|
|
/*
|
|
* Read and decompress a tile of data. The
|
|
* tile is selected by the (x,y,z,s) coordinates.
|
|
*/
|
|
tmsize_t
|
|
TIFFReadTile(TIFF* tif, void* buf, uint32 x, uint32 y, uint32 z, uint16 s)
|
|
{
|
|
if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s))
|
|
return ((tmsize_t)(-1));
|
|
return (TIFFReadEncodedTile(tif,
|
|
TIFFComputeTile(tif, x, y, z, s), buf, (tmsize_t)(-1)));
|
|
}
|
|
|
|
/*
|
|
* Read a tile of data and decompress the specified
|
|
* amount into the user-supplied buffer.
|
|
*/
|
|
tmsize_t
|
|
TIFFReadEncodedTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size)
|
|
{
|
|
static const char module[] = "TIFFReadEncodedTile";
|
|
TIFFDirectory *td = &tif->tif_dir;
|
|
tmsize_t tilesize = tif->tif_tilesize;
|
|
|
|
if (!TIFFCheckRead(tif, 1))
|
|
return ((tmsize_t)(-1));
|
|
if (tile >= td->td_nstrips) {
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"%lu: Tile out of range, max %lu",
|
|
(unsigned long) tile, (unsigned long) td->td_nstrips);
|
|
return ((tmsize_t)(-1));
|
|
}
|
|
if (size == (tmsize_t)(-1))
|
|
size = tilesize;
|
|
else if (size > tilesize)
|
|
size = tilesize;
|
|
if (TIFFFillTile(tif, tile) && (*tif->tif_decodetile)(tif,
|
|
(uint8*) buf, size, (uint16)(tile/td->td_stripsperimage))) {
|
|
(*tif->tif_postdecode)(tif, (uint8*) buf, size);
|
|
return (size);
|
|
} else
|
|
return ((tmsize_t)(-1));
|
|
}
|
|
|
|
static tmsize_t
|
|
TIFFReadRawTile1(TIFF* tif, uint32 tile, void* buf, tmsize_t size, const char* module)
|
|
{
|
|
TIFFDirectory *td = &tif->tif_dir;
|
|
|
|
if (!_TIFFFillStriles( tif ))
|
|
return ((tmsize_t)(-1));
|
|
|
|
assert((tif->tif_flags&TIFF_NOREADRAW)==0);
|
|
if (!isMapped(tif)) {
|
|
tmsize_t cc;
|
|
|
|
if (!SeekOK(tif, td->td_stripoffset[tile])) {
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Seek error at row %lu, col %lu, tile %lu",
|
|
(unsigned long) tif->tif_row,
|
|
(unsigned long) tif->tif_col,
|
|
(unsigned long) tile);
|
|
return ((tmsize_t)(-1));
|
|
}
|
|
cc = TIFFReadFile(tif, buf, size);
|
|
if (cc != size) {
|
|
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Read error at row %lu, col %lu; got %I64u bytes, expected %I64u",
|
|
(unsigned long) tif->tif_row,
|
|
(unsigned long) tif->tif_col,
|
|
(unsigned __int64) cc,
|
|
(unsigned __int64) size);
|
|
#else
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Read error at row %lu, col %lu; got %llu bytes, expected %llu",
|
|
(unsigned long) tif->tif_row,
|
|
(unsigned long) tif->tif_col,
|
|
(unsigned long long) cc,
|
|
(unsigned long long) size);
|
|
#endif
|
|
return ((tmsize_t)(-1));
|
|
}
|
|
} else {
|
|
tmsize_t ma,mb;
|
|
tmsize_t n;
|
|
ma=(tmsize_t)td->td_stripoffset[tile];
|
|
mb=ma+size;
|
|
if (((uint64)ma!=td->td_stripoffset[tile])||(ma>tif->tif_size))
|
|
n=0;
|
|
else if ((mb<ma)||(mb<size)||(mb>tif->tif_size))
|
|
n=tif->tif_size-ma;
|
|
else
|
|
n=size;
|
|
if (n!=size) {
|
|
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Read error at row %lu, col %lu, tile %lu; got %I64u bytes, expected %I64u",
|
|
(unsigned long) tif->tif_row,
|
|
(unsigned long) tif->tif_col,
|
|
(unsigned long) tile,
|
|
(unsigned __int64) n,
|
|
(unsigned __int64) size);
|
|
#else
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Read error at row %lu, col %lu, tile %lu; got %llu bytes, expected %llu",
|
|
(unsigned long) tif->tif_row,
|
|
(unsigned long) tif->tif_col,
|
|
(unsigned long) tile,
|
|
(unsigned long long) n,
|
|
(unsigned long long) size);
|
|
#endif
|
|
return ((tmsize_t)(-1));
|
|
}
|
|
_TIFFmemcpy(buf, tif->tif_base + ma, size);
|
|
}
|
|
return (size);
|
|
}
|
|
|
|
/*
|
|
* Read a tile of data from the file.
|
|
*/
|
|
tmsize_t
|
|
TIFFReadRawTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size)
|
|
{
|
|
static const char module[] = "TIFFReadRawTile";
|
|
TIFFDirectory *td = &tif->tif_dir;
|
|
uint64 bytecount64;
|
|
tmsize_t bytecountm;
|
|
|
|
if (!TIFFCheckRead(tif, 1))
|
|
return ((tmsize_t)(-1));
|
|
if (tile >= td->td_nstrips) {
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"%lu: Tile out of range, max %lu",
|
|
(unsigned long) tile, (unsigned long) td->td_nstrips);
|
|
return ((tmsize_t)(-1));
|
|
}
|
|
if (tif->tif_flags&TIFF_NOREADRAW)
|
|
{
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Compression scheme does not support access to raw uncompressed data");
|
|
return ((tmsize_t)(-1));
|
|
}
|
|
bytecount64 = td->td_stripbytecount[tile];
|
|
if (size != (tmsize_t)(-1) && (uint64)size < bytecount64)
|
|
bytecount64 = (uint64)size;
|
|
bytecountm = (tmsize_t)bytecount64;
|
|
if ((uint64)bytecountm!=bytecount64)
|
|
{
|
|
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
|
|
return ((tmsize_t)(-1));
|
|
}
|
|
return (TIFFReadRawTile1(tif, tile, buf, bytecountm, module));
|
|
}
|
|
|
|
/*
|
|
* Read the specified tile and setup for decoding. The data buffer is
|
|
* expanded, as necessary, to hold the tile's data.
|
|
*/
|
|
int
|
|
TIFFFillTile(TIFF* tif, uint32 tile)
|
|
{
|
|
static const char module[] = "TIFFFillTile";
|
|
TIFFDirectory *td = &tif->tif_dir;
|
|
|
|
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
|
|
return 0;
|
|
|
|
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
|
|
{
|
|
uint64 bytecount = td->td_stripbytecount[tile];
|
|
if (bytecount <= 0) {
|
|
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"%I64u: Invalid tile byte count, tile %lu",
|
|
(unsigned __int64) bytecount,
|
|
(unsigned long) tile);
|
|
#else
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"%llu: Invalid tile byte count, tile %lu",
|
|
(unsigned long long) bytecount,
|
|
(unsigned long) tile);
|
|
#endif
|
|
return (0);
|
|
}
|
|
if (isMapped(tif) &&
|
|
(isFillOrder(tif, td->td_fillorder)
|
|
|| (tif->tif_flags & TIFF_NOBITREV))) {
|
|
/*
|
|
* The image is mapped into memory and we either don't
|
|
* need to flip bits or the compression routine is
|
|
* going to handle this operation itself. In this
|
|
* case, avoid copying the raw data and instead just
|
|
* reference the data from the memory mapped file
|
|
* image. This assumes that the decompression
|
|
* routines do not modify the contents of the raw data
|
|
* buffer (if they try to, the application will get a
|
|
* fault since the file is mapped read-only).
|
|
*/
|
|
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
|
|
_TIFFfree(tif->tif_rawdata);
|
|
tif->tif_rawdata = NULL;
|
|
tif->tif_rawdatasize = 0;
|
|
}
|
|
tif->tif_flags &= ~TIFF_MYBUFFER;
|
|
/*
|
|
* We must check for overflow, potentially causing
|
|
* an OOB read. Instead of simple
|
|
*
|
|
* td->td_stripoffset[tile]+bytecount > tif->tif_size
|
|
*
|
|
* comparison (which can overflow) we do the following
|
|
* two comparisons:
|
|
*/
|
|
if (bytecount > (uint64)tif->tif_size ||
|
|
td->td_stripoffset[tile] > (uint64)tif->tif_size - bytecount) {
|
|
tif->tif_curtile = NOTILE;
|
|
return (0);
|
|
}
|
|
tif->tif_rawdatasize = (tmsize_t)bytecount;
|
|
tif->tif_rawdata =
|
|
tif->tif_base + (tmsize_t)td->td_stripoffset[tile];
|
|
tif->tif_rawdataoff = 0;
|
|
tif->tif_rawdataloaded = (tmsize_t) bytecount;
|
|
tif->tif_flags |= TIFF_BUFFERMMAP;
|
|
} else {
|
|
/*
|
|
* Expand raw data buffer, if needed, to hold data
|
|
* tile coming from file (perhaps should set upper
|
|
* bound on the size of a buffer we'll use?).
|
|
*/
|
|
tmsize_t bytecountm;
|
|
bytecountm=(tmsize_t)bytecount;
|
|
if ((uint64)bytecountm!=bytecount)
|
|
{
|
|
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
|
|
return(0);
|
|
}
|
|
if (bytecountm > tif->tif_rawdatasize) {
|
|
tif->tif_curtile = NOTILE;
|
|
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"Data buffer too small to hold tile %lu",
|
|
(unsigned long) tile);
|
|
return (0);
|
|
}
|
|
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
|
|
return (0);
|
|
}
|
|
if (tif->tif_flags&TIFF_BUFFERMMAP) {
|
|
tif->tif_curtile = NOTILE;
|
|
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
|
|
return (0);
|
|
}
|
|
|
|
if (TIFFReadRawTile1(tif, tile, tif->tif_rawdata,
|
|
bytecountm, module) != bytecountm)
|
|
return (0);
|
|
|
|
tif->tif_rawdataoff = 0;
|
|
tif->tif_rawdataloaded = bytecountm;
|
|
|
|
if (!isFillOrder(tif, td->td_fillorder) &&
|
|
(tif->tif_flags & TIFF_NOBITREV) == 0)
|
|
TIFFReverseBits(tif->tif_rawdata,
|
|
tif->tif_rawdataloaded);
|
|
}
|
|
}
|
|
return (TIFFStartTile(tif, tile));
|
|
}
|
|
|
|
/*
|
|
* Setup the raw data buffer in preparation for
|
|
* reading a strip of raw data. If the buffer
|
|
* is specified as zero, then a buffer of appropriate
|
|
* size is allocated by the library. Otherwise,
|
|
* the client must guarantee that the buffer is
|
|
* large enough to hold any individual strip of
|
|
* raw data.
|
|
*/
|
|
int
|
|
TIFFReadBufferSetup(TIFF* tif, void* bp, tmsize_t size)
|
|
{
|
|
static const char module[] = "TIFFReadBufferSetup";
|
|
|
|
assert((tif->tif_flags&TIFF_NOREADRAW)==0);
|
|
tif->tif_flags &= ~TIFF_BUFFERMMAP;
|
|
|
|
if (tif->tif_rawdata) {
|
|
if (tif->tif_flags & TIFF_MYBUFFER)
|
|
_TIFFfree(tif->tif_rawdata);
|
|
tif->tif_rawdata = NULL;
|
|
tif->tif_rawdatasize = 0;
|
|
}
|
|
if (bp) {
|
|
tif->tif_rawdatasize = size;
|
|
tif->tif_rawdata = (uint8*) bp;
|
|
tif->tif_flags &= ~TIFF_MYBUFFER;
|
|
} else {
|
|
tif->tif_rawdatasize = (tmsize_t)TIFFroundup_64((uint64)size, 1024);
|
|
if (tif->tif_rawdatasize==0)
|
|
tif->tif_rawdatasize=(tmsize_t)(-1);
|
|
tif->tif_rawdata = (uint8*) _TIFFmalloc(tif->tif_rawdatasize);
|
|
tif->tif_flags |= TIFF_MYBUFFER;
|
|
}
|
|
if (tif->tif_rawdata == NULL) {
|
|
TIFFErrorExt(tif->tif_clientdata, module,
|
|
"No space for data buffer at scanline %lu",
|
|
(unsigned long) tif->tif_row);
|
|
tif->tif_rawdatasize = 0;
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Set state to appear as if a
|
|
* strip has just been read in.
|
|
*/
|
|
static int
|
|
TIFFStartStrip(TIFF* tif, uint32 strip)
|
|
{
|
|
TIFFDirectory *td = &tif->tif_dir;
|
|
|
|
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
|
|
return 0;
|
|
|
|
if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
|
|
if (!(*tif->tif_setupdecode)(tif))
|
|
return (0);
|
|
tif->tif_flags |= TIFF_CODERSETUP;
|
|
}
|
|
tif->tif_curstrip = strip;
|
|
tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
|
|
tif->tif_flags &= ~TIFF_BUF4WRITE;
|
|
|
|
if (tif->tif_flags&TIFF_NOREADRAW)
|
|
{
|
|
tif->tif_rawcp = NULL;
|
|
tif->tif_rawcc = 0;
|
|
}
|
|
else
|
|
{
|
|
tif->tif_rawcp = tif->tif_rawdata;
|
|
tif->tif_rawcc = (tmsize_t)td->td_stripbytecount[strip];
|
|
}
|
|
return ((*tif->tif_predecode)(tif,
|
|
(uint16)(strip / td->td_stripsperimage)));
|
|
}
|
|
|
|
/*
|
|
* Set state to appear as if a
|
|
* tile has just been read in.
|
|
*/
|
|
static int
|
|
TIFFStartTile(TIFF* tif, uint32 tile)
|
|
{
|
|
TIFFDirectory *td = &tif->tif_dir;
|
|
|
|
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
|
|
return 0;
|
|
|
|
if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
|
|
if (!(*tif->tif_setupdecode)(tif))
|
|
return (0);
|
|
tif->tif_flags |= TIFF_CODERSETUP;
|
|
}
|
|
tif->tif_curtile = tile;
|
|
tif->tif_row =
|
|
(tile % TIFFhowmany_32(td->td_imagewidth, td->td_tilewidth)) *
|
|
td->td_tilelength;
|
|
tif->tif_col =
|
|
(tile % TIFFhowmany_32(td->td_imagelength, td->td_tilelength)) *
|
|
td->td_tilewidth;
|
|
tif->tif_flags &= ~TIFF_BUF4WRITE;
|
|
if (tif->tif_flags&TIFF_NOREADRAW)
|
|
{
|
|
tif->tif_rawcp = NULL;
|
|
tif->tif_rawcc = 0;
|
|
}
|
|
else
|
|
{
|
|
tif->tif_rawcp = tif->tif_rawdata;
|
|
tif->tif_rawcc = (tmsize_t)td->td_stripbytecount[tile];
|
|
}
|
|
return ((*tif->tif_predecode)(tif,
|
|
(uint16)(tile/td->td_stripsperimage)));
|
|
}
|
|
|
|
static int
|
|
TIFFCheckRead(TIFF* tif, int tiles)
|
|
{
|
|
if (tif->tif_mode == O_WRONLY) {
|
|
TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "File not open for reading");
|
|
return (0);
|
|
}
|
|
if (tiles ^ isTiled(tif)) {
|
|
TIFFErrorExt(tif->tif_clientdata, tif->tif_name, tiles ?
|
|
"Can not read tiles from a stripped image" :
|
|
"Can not read scanlines from a tiled image");
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
_TIFFNoPostDecode(TIFF* tif, uint8* buf, tmsize_t cc)
|
|
{
|
|
(void) tif; (void) buf; (void) cc;
|
|
}
|
|
|
|
void
|
|
_TIFFSwab16BitData(TIFF* tif, uint8* buf, tmsize_t cc)
|
|
{
|
|
(void) tif;
|
|
assert((cc & 1) == 0);
|
|
TIFFSwabArrayOfShort((uint16*) buf, cc/2);
|
|
}
|
|
|
|
void
|
|
_TIFFSwab24BitData(TIFF* tif, uint8* buf, tmsize_t cc)
|
|
{
|
|
(void) tif;
|
|
assert((cc % 3) == 0);
|
|
TIFFSwabArrayOfTriples((uint8*) buf, cc/3);
|
|
}
|
|
|
|
void
|
|
_TIFFSwab32BitData(TIFF* tif, uint8* buf, tmsize_t cc)
|
|
{
|
|
(void) tif;
|
|
assert((cc & 3) == 0);
|
|
TIFFSwabArrayOfLong((uint32*) buf, cc/4);
|
|
}
|
|
|
|
void
|
|
_TIFFSwab64BitData(TIFF* tif, uint8* buf, tmsize_t cc)
|
|
{
|
|
(void) tif;
|
|
assert((cc & 7) == 0);
|
|
TIFFSwabArrayOfDouble((double*) buf, cc/8);
|
|
}
|
|
|
|
/* vim: set ts=8 sts=8 sw=8 noet: */
|
|
/*
|
|
* Local Variables:
|
|
* mode: c
|
|
* c-basic-offset: 8
|
|
* fill-column: 78
|
|
* End:
|
|
*/
|