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Unified Diff: third_party/tiff_v403/tif_read.c

Issue 1563103002: XFA: Upgrade to libtiff 4.0.6. (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@xfa
Patch Set: rename to libtiff Created 4 years, 11 months ago
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Index: third_party/tiff_v403/tif_read.c
diff --git a/third_party/tiff_v403/tif_read.c b/third_party/tiff_v403/tif_read.c
deleted file mode 100644
index eb9350846e514969d69ecbed03efaebdc0f675dd..0000000000000000000000000000000000000000
--- a/third_party/tiff_v403/tif_read.c
+++ /dev/null
@@ -1,1114 +0,0 @@
-/* $Id: tif_read.c,v 1.41 2012-07-06 19:22:58 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.
- */
-
-/*
- * TIFF Library.
- * Scanline-oriented Read Support
- */
-#include "tiffiop.h"
-#include <stdio.h>
-
-int TIFFFillStrip(TIFF* tif, uint32 strip);
-int TIFFFillTile(TIFF* tif, uint32 tile);
-static int TIFFStartStrip(TIFF* tif, uint32 strip);
-static int TIFFStartTile(TIFF* tif, uint32 tile);
-static int TIFFCheckRead(TIFF*, int);
-static tmsize_t
-TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size,const char* module);
-
-#define NOSTRIP ((uint32)(-1)) /* undefined state */
-#define NOTILE ((uint32)(-1)) /* undefined state */
-
-static int
-TIFFFillStripPartial( TIFF *tif, int strip, tmsize_t read_ahead, int restart )
-{
- static const char module[] = "TIFFFillStripPartial";
- register TIFFDirectory *td = &tif->tif_dir;
- uint64 unused_data;
- uint64 read_offset;
- tmsize_t cc, to_read;
- /* tmsize_t bytecountm; */
-
- if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
- return 0;
-
- /*
- * 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?).
- */
-
- /* bytecountm=(tmsize_t) td->td_stripbytecount[strip]; */
- if (read_ahead*2 > tif->tif_rawdatasize) {
- assert( restart );
-
- tif->tif_curstrip = NOSTRIP;
- if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
- TIFFErrorExt(tif->tif_clientdata, module,
- "Data buffer too small to hold part of strip %lu",
- (unsigned long) strip);
- return (0);
- }
- if (!TIFFReadBufferSetup(tif, 0, read_ahead*2))
- return (0);
- }
-
- if( restart )
- {
- tif->tif_rawdataloaded = 0;
- tif->tif_rawdataoff = 0;
- }
-
- /*
- ** If we are reading more data, move any unused data to the
- ** start of the buffer.
- */
- if( tif->tif_rawdataloaded > 0 )
- unused_data = tif->tif_rawdataloaded - (tif->tif_rawcp - tif->tif_rawdata);
- else
- unused_data = 0;
-
- if( unused_data > 0 )
- {
- assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
- memmove( tif->tif_rawdata, tif->tif_rawcp, (size_t)unused_data );
- }
-
- /*
- ** Seek to the point in the file where more data should be read.
- */
- read_offset = td->td_stripoffset[strip]
- + tif->tif_rawdataoff + tif->tif_rawdataloaded;
-
- if (!SeekOK(tif, read_offset)) {
- TIFFErrorExt(tif->tif_clientdata, module,
- "Seek error at scanline %lu, strip %lu",
- (unsigned long) tif->tif_row, (unsigned long) strip);
- return 0;
- }
-
- /*
- ** How much do we want to read?
- */
- to_read = (tmsize_t)(tif->tif_rawdatasize - unused_data);
- if( (uint64) to_read > td->td_stripbytecount[strip]
- - tif->tif_rawdataoff - tif->tif_rawdataloaded )
- {
- to_read = (tmsize_t)(td->td_stripbytecount[strip]
- - tif->tif_rawdataoff - tif->tif_rawdataloaded);
- }
-
- assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
- cc = TIFFReadFile(tif, tif->tif_rawdata + unused_data, to_read);
-
- if (cc != to_read) {
-#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
- TIFFErrorExt(tif->tif_clientdata, module,
- "Read error at scanline %lu; got %I64u bytes, expected %I64u",
- (unsigned long) tif->tif_row,
- (unsigned __int64) cc,
- (unsigned __int64) to_read);
-#else
- TIFFErrorExt(tif->tif_clientdata, module,
- "Read error at scanline %lu; got %llu bytes, expected %llu",
- (unsigned long) tif->tif_row,
- (unsigned long long) cc,
- (unsigned long long) to_read);
-#endif
- return 0;
- }
-
- tif->tif_rawdataoff = (tmsize_t)(tif->tif_rawdataoff + tif->tif_rawdataloaded - unused_data) ;
- tif->tif_rawdataloaded = (tmsize_t)unused_data + to_read;
-
- tif->tif_rawcp = tif->tif_rawdata;
-
- if (!isFillOrder(tif, td->td_fillorder) &&
- (tif->tif_flags & TIFF_NOBITREV) == 0) {
- assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
- TIFFReverseBits(tif->tif_rawdata + unused_data, to_read );
- }
-
- /*
- ** When starting a strip from the beginning we need to
- ** restart the decoder.
- */
- if( restart )
- return TIFFStartStrip(tif, strip);
- else
- return 1;
-}
-
-/*
- * Seek to a random row+sample in a file.
- *
- * Only used by TIFFReadScanline, and is only used on
- * strip organized files. We do some tricky stuff to try
- * and avoid reading the whole compressed raw data for big
- * strips.
- */
-static int
-TIFFSeek(TIFF* tif, uint32 row, uint16 sample )
-{
- register TIFFDirectory *td = &tif->tif_dir;
- uint32 strip;
- int whole_strip;
- tmsize_t read_ahead = 0;
-
- /*
- ** Establish what strip we are working from.
- */
- if (row >= td->td_imagelength) { /* out of range */
- TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
- "%lu: Row out of range, max %lu",
- (unsigned long) row,
- (unsigned long) td->td_imagelength);
- return (0);
- }
- if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
- if (sample >= td->td_samplesperpixel) {
- TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
- "%lu: Sample out of range, max %lu",
- (unsigned long) sample, (unsigned long) td->td_samplesperpixel);
- return (0);
- }
- strip = (uint32)sample*td->td_stripsperimage + row/td->td_rowsperstrip;
- } else
- strip = row / td->td_rowsperstrip;
-
- /*
- * Do we want to treat this strip as one whole chunk or
- * read it a few lines at a time?
- */
-#if defined(CHUNKY_STRIP_READ_SUPPORT)
- if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
- return 0;
- whole_strip = tif->tif_dir.td_stripbytecount[strip] < 10
- || isMapped(tif);
-#else
- whole_strip = 1;
-#endif
-
- if( !whole_strip )
- {
- read_ahead = tif->tif_scanlinesize * 16 + 5000;
- }
-
- /*
- * If we haven't loaded this strip, do so now, possibly
- * only reading the first part.
- */
- if (strip != tif->tif_curstrip) { /* different strip, refill */
-
- if( whole_strip )
- {
- if (!TIFFFillStrip(tif, strip))
- return (0);
- }
- else
- {
- if( !TIFFFillStripPartial(tif,strip,read_ahead,1) )
- return 0;
- }
- }
-
- /*
- ** If we already have some data loaded, do we need to read some more?
- */
- else if( !whole_strip )
- {
- if( ((tif->tif_rawdata + tif->tif_rawdataloaded) - tif->tif_rawcp) < read_ahead
- && (uint64) tif->tif_rawdataoff+tif->tif_rawdataloaded < td->td_stripbytecount[strip] )
- {
- if( !TIFFFillStripPartial(tif,strip,read_ahead,0) )
- return 0;
- }
- }
-
- if (row < tif->tif_row) {
- /*
- * Moving backwards within the same strip: backup
- * to the start and then decode forward (below).
- *
- * NB: If you're planning on lots of random access within a
- * strip, it's better to just read and decode the entire
- * strip, and then access the decoded data in a random fashion.
- */
-
- if( tif->tif_rawdataoff != 0 )
- {
- if( !TIFFFillStripPartial(tif,strip,read_ahead,1) )
- return 0;
- }
- else
- {
- if (!TIFFStartStrip(tif, strip))
- return (0);
- }
- }
-
- if (row != tif->tif_row) {
- /*
- * Seek forward to the desired row.
- */
-
- /* TODO: Will this really work with partial buffers? */
-
- if (!(*tif->tif_seek)(tif, row - tif->tif_row))
- return (0);
- tif->tif_row = row;
- }
-
- return (1);
-}
-
-int
-TIFFReadScanline(TIFF* tif, void* buf, uint32 row, uint16 sample)
-{
- int e;
-
- if (!TIFFCheckRead(tif, 0))
- return (-1);
- if( (e = TIFFSeek(tif, row, sample)) != 0) {
- /*
- * Decompress desired row into user buffer.
- */
- e = (*tif->tif_decoderow)
- (tif, (uint8*) buf, tif->tif_scanlinesize, sample);
-
- /* we are now poised at the beginning of the next row */
- tif->tif_row = row + 1;
-
- if (e)
- (*tif->tif_postdecode)(tif, (uint8*) buf,
- tif->tif_scanlinesize);
- }
- return (e > 0 ? 1 : -1);
-}
-
-/*
- * Read a strip of data and decompress the specified
- * amount into the user-supplied buffer.
- */
-tmsize_t
-TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size)
-{
- static const char module[] = "TIFFReadEncodedStrip";
- TIFFDirectory *td = &tif->tif_dir;
- uint32 rowsperstrip;
- uint32 stripsperplane;
- uint32 stripinplane;
- uint16 plane, comp;
- uint32 rows;
- tmsize_t stripsize;
- if (!TIFFCheckRead(tif,0))
- return((tmsize_t)(-1));
- if (strip>=td->td_nstrips)
- {
- TIFFErrorExt(tif->tif_clientdata,module,
- "%lu: Strip out of range, max %lu",(unsigned long)strip,
- (unsigned long)td->td_nstrips);
- return((tmsize_t)(-1));
- }
- /*
- * Calculate the strip size according to the number of
- * rows in the strip (check for truncated last strip on any
- * of the separations).
- */
- rowsperstrip=td->td_rowsperstrip;
- if (rowsperstrip>td->td_imagelength)
- rowsperstrip=td->td_imagelength;
- stripsperplane=((td->td_imagelength+rowsperstrip-1)/rowsperstrip);
- stripinplane=(strip%stripsperplane);
- plane=(strip/stripsperplane);
- rows=td->td_imagelength-stripinplane*rowsperstrip;
- if (rows>rowsperstrip)
- rows=rowsperstrip;
- stripsize=TIFFVStripSize(tif,rows);
- if (stripsize==0)
- return((tmsize_t)(-1));
- if ((size!=(tmsize_t)(-1))&&(size<stripsize))
- stripsize=size;
-
- /*
- * discard those.
- * keep code modified by Changjin Gao.
- * Xiaochuan Liu 20100828.
- */
- /*if (!TIFFFillStrip(tif,strip))
- return((tmsize_t)(-1));
- if ((*tif->tif_decodestrip)(tif,buf,stripsize,plane)<=0)
- return((tmsize_t)(-1));
- (*tif->tif_postdecode)(tif,buf,stripsize);
- return(stripsize);*/
-
- /*
- * Changjin Gao 20110726 fixed decode error issue.
- * Test file: mantis #27308 020511-1158450.tiff.
- */
- comp = COMPRESSION_NONE;
-StripDecode:
- if (TIFFFillStrip(tif, strip) && (*tif->tif_decodestrip)(tif, buf, stripsize, plane) > 0)
- {
- (*tif->tif_postdecode)(tif, buf, stripsize);
- return (stripsize);
- }
- else
- {
- if (comp < 9)
- {
- TIFFSetField(tif, TIFFTAG_COMPRESSION, comp);
- TIFFSetField(tif, TIFFTAG_FAXMODE,FAXMODE_CLASSIC);
- comp++;
- goto StripDecode;
- }
-
- return ((tsize_t) -1);
- }
-}
-
-static tmsize_t
-TIFFReadRawStrip1(TIFF* tif, uint32 strip, 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[strip])) {
- TIFFErrorExt(tif->tif_clientdata, module,
- "Seek error at scanline %lu, strip %lu",
- (unsigned long) tif->tif_row, (unsigned long) strip);
- 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 scanline %lu; got %I64u bytes, expected %I64u",
- (unsigned long) tif->tif_row,
- (unsigned __int64) cc,
- (unsigned __int64) size);
-#else
- TIFFErrorExt(tif->tif_clientdata, module,
- "Read error at scanline %lu; got %llu bytes, expected %llu",
- (unsigned long) tif->tif_row,
- (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[strip];
- mb=ma+size;
- if (((uint64)ma!=td->td_stripoffset[strip])||(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 scanline %lu, strip %lu; got %I64u bytes, expected %I64u",
- (unsigned long) tif->tif_row,
- (unsigned long) strip,
- (unsigned __int64) n,
- (unsigned __int64) size);
-#else
- TIFFErrorExt(tif->tif_clientdata, module,
- "Read error at scanline %lu, strip %lu; got %llu bytes, expected %llu",
- (unsigned long) tif->tif_row,
- (unsigned long) strip,
- (unsigned long long) n,
- (unsigned long long) size);
-#endif
- return ((tmsize_t)(-1));
- }
- _TIFFmemcpy(buf, tif->tif_base + ma,
- size);
- }
- return (size);
-}
-
-/*
- * Read a strip of data from the file.
- */
-tmsize_t
-TIFFReadRawStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size)
-{
- static const char module[] = "TIFFReadRawStrip";
- TIFFDirectory *td = &tif->tif_dir;
- uint64 bytecount;
- tmsize_t bytecountm;
-
- if (!TIFFCheckRead(tif, 0))
- return ((tmsize_t)(-1));
- if (strip >= td->td_nstrips) {
- TIFFErrorExt(tif->tif_clientdata, module,
- "%lu: Strip out of range, max %lu",
- (unsigned long) strip,
- (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));
- }
- bytecount = td->td_stripbytecount[strip];
- if (bytecount <= 0) {
-#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
- TIFFErrorExt(tif->tif_clientdata, module,
- "%I64u: Invalid strip byte count, strip %lu",
- (unsigned __int64) bytecount,
- (unsigned long) strip);
-#else
- TIFFErrorExt(tif->tif_clientdata, module,
- "%llu: Invalid strip byte count, strip %lu",
- (unsigned long long) bytecount,
- (unsigned long) strip);
-#endif
- return ((tmsize_t)(-1));
- }
- bytecountm = (tmsize_t)bytecount;
- if ((uint64)bytecountm!=bytecount) {
- TIFFErrorExt(tif->tif_clientdata, module, "Integer overflow");
- return ((tmsize_t)(-1));
- }
- if (size != (tmsize_t)(-1) && size < bytecountm)
- bytecountm = size;
- return (TIFFReadRawStrip1(tif, strip, buf, bytecountm, module));
-}
-
-/*
- * Read the specified strip and setup for decoding. The data buffer is
- * expanded, as necessary, to hold the strip's data.
- */
-int
-TIFFFillStrip(TIFF* tif, uint32 strip)
-{
- 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:
- */
-
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