Open Source Computer Vision Library
https://opencv.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
642 lines
18 KiB
642 lines
18 KiB
/* $Id: tif_read.c,v 1.1 2005-06-17 13:54:52 vp153 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*, tstrip_t); |
|
int TIFFFillTile(TIFF*, ttile_t); |
|
static int TIFFStartStrip(TIFF*, tstrip_t); |
|
static int TIFFStartTile(TIFF*, ttile_t); |
|
static int TIFFCheckRead(TIFF*, int); |
|
|
|
#define NOSTRIP ((tstrip_t) -1) /* undefined state */ |
|
#define NOTILE ((ttile_t) -1) /* undefined state */ |
|
|
|
/* |
|
* Seek to a random row+sample in a file. |
|
*/ |
|
static int |
|
TIFFSeek(TIFF* tif, uint32 row, tsample_t sample) |
|
{ |
|
register TIFFDirectory *td = &tif->tif_dir; |
|
tstrip_t strip; |
|
|
|
if (row >= td->td_imagelength) { /* out of range */ |
|
TIFFError(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) { |
|
TIFFError(tif->tif_name, |
|
"%lu: Sample out of range, max %lu", |
|
(unsigned long) sample, (unsigned long) td->td_samplesperpixel); |
|
return (0); |
|
} |
|
strip = sample*td->td_stripsperimage + row/td->td_rowsperstrip; |
|
} else |
|
strip = row / td->td_rowsperstrip; |
|
if (strip != tif->tif_curstrip) { /* different strip, refill */ |
|
if (!TIFFFillStrip(tif, strip)) |
|
return (0); |
|
} else 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 (!TIFFStartStrip(tif, strip)) |
|
return (0); |
|
} |
|
if (row != tif->tif_row) { |
|
/* |
|
* Seek forward to the desired row. |
|
*/ |
|
if (!(*tif->tif_seek)(tif, row - tif->tif_row)) |
|
return (0); |
|
tif->tif_row = row; |
|
} |
|
return (1); |
|
} |
|
|
|
int |
|
TIFFReadScanline(TIFF* tif, tdata_t buf, uint32 row, tsample_t 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, (tidata_t) 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, (tidata_t) buf, |
|
tif->tif_scanlinesize); |
|
} |
|
return (e > 0 ? 1 : -1); |
|
} |
|
|
|
/* |
|
* Read a strip of data and decompress the specified |
|
* amount into the user-supplied buffer. |
|
*/ |
|
tsize_t |
|
TIFFReadEncodedStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size) |
|
{ |
|
TIFFDirectory *td = &tif->tif_dir; |
|
uint32 nrows; |
|
tsize_t stripsize; |
|
tstrip_t sep_strip, strips_per_sep; |
|
|
|
if (!TIFFCheckRead(tif, 0)) |
|
return (-1); |
|
if (strip >= td->td_nstrips) { |
|
TIFFError(tif->tif_name, "%ld: Strip out of range, max %ld", |
|
(long) strip, (long) td->td_nstrips); |
|
return (-1); |
|
} |
|
/* |
|
* Calculate the strip size according to the number of |
|
* rows in the strip (check for truncated last strip on any |
|
* of the separations). |
|
*/ |
|
if( td->td_rowsperstrip >= td->td_imagelength ) |
|
strips_per_sep = 1; |
|
else |
|
strips_per_sep = (td->td_imagelength+td->td_rowsperstrip-1) |
|
/ td->td_rowsperstrip; |
|
|
|
sep_strip = strip % strips_per_sep; |
|
|
|
if (sep_strip != strips_per_sep-1 || |
|
(nrows = td->td_imagelength % td->td_rowsperstrip) == 0) |
|
nrows = td->td_rowsperstrip; |
|
|
|
stripsize = TIFFVStripSize(tif, nrows); |
|
if (size == (tsize_t) -1) |
|
size = stripsize; |
|
else if (size > stripsize) |
|
size = stripsize; |
|
if (TIFFFillStrip(tif, strip) |
|
&& (*tif->tif_decodestrip)(tif, (tidata_t) buf, size, |
|
(tsample_t)(strip / td->td_stripsperimage)) > 0 ) { |
|
(*tif->tif_postdecode)(tif, (tidata_t) buf, size); |
|
return (size); |
|
} else |
|
return ((tsize_t) -1); |
|
} |
|
|
|
static tsize_t |
|
TIFFReadRawStrip1(TIFF* tif, |
|
tstrip_t strip, tdata_t buf, tsize_t size, const char* module) |
|
{ |
|
TIFFDirectory *td = &tif->tif_dir; |
|
|
|
if (!isMapped(tif)) { |
|
tsize_t cc; |
|
|
|
if (!SeekOK(tif, td->td_stripoffset[strip])) { |
|
TIFFError(module, |
|
"%s: Seek error at scanline %lu, strip %lu", |
|
tif->tif_name, |
|
(unsigned long) tif->tif_row, (unsigned long) strip); |
|
return (-1); |
|
} |
|
cc = TIFFReadFile(tif, buf, size); |
|
if (cc != size) { |
|
TIFFError(module, |
|
"%s: Read error at scanline %lu; got %lu bytes, expected %lu", |
|
tif->tif_name, |
|
(unsigned long) tif->tif_row, |
|
(unsigned long) cc, |
|
(unsigned long) size); |
|
return (-1); |
|
} |
|
} else { |
|
if (td->td_stripoffset[strip] + size > tif->tif_size) { |
|
TIFFError(module, |
|
"%s: Read error at scanline %lu, strip %lu; got %lu bytes, expected %lu", |
|
tif->tif_name, |
|
(unsigned long) tif->tif_row, |
|
(unsigned long) strip, |
|
(unsigned long) tif->tif_size - td->td_stripoffset[strip], |
|
(unsigned long) size); |
|
return (-1); |
|
} |
|
_TIFFmemcpy(buf, tif->tif_base + td->td_stripoffset[strip], |
|
size); |
|
} |
|
return (size); |
|
} |
|
|
|
/* |
|
* Read a strip of data from the file. |
|
*/ |
|
tsize_t |
|
TIFFReadRawStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size) |
|
{ |
|
static const char module[] = "TIFFReadRawStrip"; |
|
TIFFDirectory *td = &tif->tif_dir; |
|
tsize_t bytecount; |
|
|
|
if (!TIFFCheckRead(tif, 0)) |
|
return ((tsize_t) -1); |
|
if (strip >= td->td_nstrips) { |
|
TIFFError(tif->tif_name, "%lu: Strip out of range, max %lu", |
|
(unsigned long) strip, (unsigned long) td->td_nstrips); |
|
return ((tsize_t) -1); |
|
} |
|
bytecount = td->td_stripbytecount[strip]; |
|
if (bytecount <= 0) { |
|
TIFFError(tif->tif_name, |
|
"%lu: Invalid strip byte count, strip %lu", |
|
(unsigned long) bytecount, (unsigned long) strip); |
|
return ((tsize_t) -1); |
|
} |
|
if (size != (tsize_t)-1 && size < bytecount) |
|
bytecount = size; |
|
return (TIFFReadRawStrip1(tif, strip, buf, bytecount, 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, tstrip_t strip) |
|
{ |
|
static const char module[] = "TIFFFillStrip"; |
|
TIFFDirectory *td = &tif->tif_dir; |
|
tsize_t bytecount; |
|
|
|
bytecount = td->td_stripbytecount[strip]; |
|
if (bytecount <= 0) { |
|
TIFFError(tif->tif_name, |
|
"%lu: Invalid strip byte count, strip %lu", |
|
(unsigned long) bytecount, (unsigned long) strip); |
|
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_flags &= ~TIFF_MYBUFFER; |
|
if ( td->td_stripoffset[strip] + bytecount > tif->tif_size) { |
|
/* |
|
* This error message might seem strange, but it's |
|
* what would happen if a read were done instead. |
|
*/ |
|
TIFFError(module, |
|
"%s: Read error on strip %lu; got %lu bytes, expected %lu", |
|
tif->tif_name, |
|
(unsigned long) strip, |
|
(unsigned long) tif->tif_size - td->td_stripoffset[strip], |
|
(unsigned long) bytecount); |
|
tif->tif_curstrip = NOSTRIP; |
|
return (0); |
|
} |
|
tif->tif_rawdatasize = bytecount; |
|
tif->tif_rawdata = tif->tif_base + td->td_stripoffset[strip]; |
|
} 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?). |
|
*/ |
|
if (bytecount > tif->tif_rawdatasize) { |
|
tif->tif_curstrip = NOSTRIP; |
|
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { |
|
TIFFError(module, |
|
"%s: Data buffer too small to hold strip %lu", |
|
tif->tif_name, (unsigned long) strip); |
|
return (0); |
|
} |
|
if (!TIFFReadBufferSetup(tif, 0, |
|
TIFFroundup(bytecount, 1024))) |
|
return (0); |
|
} |
|
if (TIFFReadRawStrip1(tif, strip, (unsigned char *)tif->tif_rawdata, |
|
bytecount, module) != bytecount) |
|
return (0); |
|
if (!isFillOrder(tif, td->td_fillorder) && |
|
(tif->tif_flags & TIFF_NOBITREV) == 0) |
|
TIFFReverseBits(tif->tif_rawdata, bytecount); |
|
} |
|
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. |
|
*/ |
|
tsize_t |
|
TIFFReadTile(TIFF* tif, |
|
tdata_t buf, uint32 x, uint32 y, uint32 z, tsample_t s) |
|
{ |
|
if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s)) |
|
return (-1); |
|
return (TIFFReadEncodedTile(tif, |
|
TIFFComputeTile(tif, x, y, z, s), buf, (tsize_t) -1)); |
|
} |
|
|
|
/* |
|
* Read a tile of data and decompress the specified |
|
* amount into the user-supplied buffer. |
|
*/ |
|
tsize_t |
|
TIFFReadEncodedTile(TIFF* tif, ttile_t tile, tdata_t buf, tsize_t size) |
|
{ |
|
TIFFDirectory *td = &tif->tif_dir; |
|
tsize_t tilesize = tif->tif_tilesize; |
|
|
|
if (!TIFFCheckRead(tif, 1)) |
|
return (-1); |
|
if (tile >= td->td_nstrips) { |
|
TIFFError(tif->tif_name, "%ld: Tile out of range, max %ld", |
|
(long) tile, (unsigned long) td->td_nstrips); |
|
return (-1); |
|
} |
|
if (size == (tsize_t) -1) |
|
size = tilesize; |
|
else if (size > tilesize) |
|
size = tilesize; |
|
if (TIFFFillTile(tif, tile) && (*tif->tif_decodetile)(tif, |
|
(tidata_t) buf, size, (tsample_t)(tile/td->td_stripsperimage))) { |
|
(*tif->tif_postdecode)(tif, (tidata_t) buf, size); |
|
return (size); |
|
} else |
|
return (-1); |
|
} |
|
|
|
static tsize_t |
|
TIFFReadRawTile1(TIFF* tif, |
|
ttile_t tile, tdata_t buf, tsize_t size, const char* module) |
|
{ |
|
TIFFDirectory *td = &tif->tif_dir; |
|
|
|
if (!isMapped(tif)) { |
|
tsize_t cc; |
|
|
|
if (!SeekOK(tif, td->td_stripoffset[tile])) { |
|
TIFFError(module, |
|
"%s: Seek error at row %ld, col %ld, tile %ld", |
|
tif->tif_name, |
|
(long) tif->tif_row, |
|
(long) tif->tif_col, |
|
(long) tile); |
|
return ((tsize_t) -1); |
|
} |
|
cc = TIFFReadFile(tif, buf, size); |
|
if (cc != size) { |
|
TIFFError(module, |
|
"%s: Read error at row %ld, col %ld; got %lu bytes, expected %lu", |
|
tif->tif_name, |
|
(long) tif->tif_row, |
|
(long) tif->tif_col, |
|
(unsigned long) cc, |
|
(unsigned long) size); |
|
return ((tsize_t) -1); |
|
} |
|
} else { |
|
if (td->td_stripoffset[tile] + size > tif->tif_size) { |
|
TIFFError(module, |
|
"%s: Read error at row %ld, col %ld, tile %ld; got %lu bytes, expected %lu", |
|
tif->tif_name, |
|
(long) tif->tif_row, |
|
(long) tif->tif_col, |
|
(long) tile, |
|
(unsigned long) tif->tif_size - td->td_stripoffset[tile], |
|
(unsigned long) size); |
|
return ((tsize_t) -1); |
|
} |
|
_TIFFmemcpy(buf, tif->tif_base + td->td_stripoffset[tile], size); |
|
} |
|
return (size); |
|
} |
|
|
|
/* |
|
* Read a tile of data from the file. |
|
*/ |
|
tsize_t |
|
TIFFReadRawTile(TIFF* tif, ttile_t tile, tdata_t buf, tsize_t size) |
|
{ |
|
static const char module[] = "TIFFReadRawTile"; |
|
TIFFDirectory *td = &tif->tif_dir; |
|
tsize_t bytecount; |
|
|
|
if (!TIFFCheckRead(tif, 1)) |
|
return ((tsize_t) -1); |
|
if (tile >= td->td_nstrips) { |
|
TIFFError(tif->tif_name, "%lu: Tile out of range, max %lu", |
|
(unsigned long) tile, (unsigned long) td->td_nstrips); |
|
return ((tsize_t) -1); |
|
} |
|
bytecount = td->td_stripbytecount[tile]; |
|
if (size != (tsize_t) -1 && size < bytecount) |
|
bytecount = size; |
|
return (TIFFReadRawTile1(tif, tile, buf, bytecount, 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, ttile_t tile) |
|
{ |
|
static const char module[] = "TIFFFillTile"; |
|
TIFFDirectory *td = &tif->tif_dir; |
|
tsize_t bytecount; |
|
|
|
bytecount = td->td_stripbytecount[tile]; |
|
if (bytecount <= 0) { |
|
TIFFError(tif->tif_name, |
|
"%lu: Invalid tile byte count, tile %lu", |
|
(unsigned long) bytecount, (unsigned long) tile); |
|
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_flags &= ~TIFF_MYBUFFER; |
|
if ( td->td_stripoffset[tile] + bytecount > tif->tif_size) { |
|
tif->tif_curtile = NOTILE; |
|
return (0); |
|
} |
|
tif->tif_rawdatasize = bytecount; |
|
tif->tif_rawdata = tif->tif_base + td->td_stripoffset[tile]; |
|
} 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?). |
|
*/ |
|
if (bytecount > tif->tif_rawdatasize) { |
|
tif->tif_curtile = NOTILE; |
|
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { |
|
TIFFError(module, |
|
"%s: Data buffer too small to hold tile %ld", |
|
tif->tif_name, (long) tile); |
|
return (0); |
|
} |
|
if (!TIFFReadBufferSetup(tif, 0, |
|
TIFFroundup(bytecount, 1024))) |
|
return (0); |
|
} |
|
if (TIFFReadRawTile1(tif, tile, |
|
(unsigned char *)tif->tif_rawdata, |
|
bytecount, module) != bytecount) |
|
return (0); |
|
if (!isFillOrder(tif, td->td_fillorder) && |
|
(tif->tif_flags & TIFF_NOBITREV) == 0) |
|
TIFFReverseBits(tif->tif_rawdata, bytecount); |
|
} |
|
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, tdata_t bp, tsize_t size) |
|
{ |
|
static const char module[] = "TIFFReadBufferSetup"; |
|
|
|
if (tif->tif_rawdata) { |
|
if (tif->tif_flags & TIFF_MYBUFFER) |
|
_TIFFfree(tif->tif_rawdata); |
|
tif->tif_rawdata = NULL; |
|
} |
|
if (bp) { |
|
tif->tif_rawdatasize = size; |
|
tif->tif_rawdata = (tidata_t) bp; |
|
tif->tif_flags &= ~TIFF_MYBUFFER; |
|
} else { |
|
tif->tif_rawdatasize = TIFFroundup(size, 1024); |
|
tif->tif_rawdata = (tidata_t) _TIFFmalloc(tif->tif_rawdatasize); |
|
tif->tif_flags |= TIFF_MYBUFFER; |
|
} |
|
if (tif->tif_rawdata == NULL) { |
|
TIFFError(module, |
|
"%s: No space for data buffer at scanline %ld", |
|
tif->tif_name, (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, tstrip_t strip) |
|
{ |
|
TIFFDirectory *td = &tif->tif_dir; |
|
|
|
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_rawcp = tif->tif_rawdata; |
|
tif->tif_rawcc = td->td_stripbytecount[strip]; |
|
return ((*tif->tif_predecode)(tif, |
|
(tsample_t)(strip / td->td_stripsperimage))); |
|
} |
|
|
|
/* |
|
* Set state to appear as if a |
|
* tile has just been read in. |
|
*/ |
|
static int |
|
TIFFStartTile(TIFF* tif, ttile_t tile) |
|
{ |
|
TIFFDirectory *td = &tif->tif_dir; |
|
|
|
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(td->td_imagewidth, td->td_tilewidth)) * |
|
td->td_tilelength; |
|
tif->tif_col = |
|
(tile % TIFFhowmany(td->td_imagelength, td->td_tilelength)) * |
|
td->td_tilewidth; |
|
tif->tif_rawcp = tif->tif_rawdata; |
|
tif->tif_rawcc = td->td_stripbytecount[tile]; |
|
return ((*tif->tif_predecode)(tif, |
|
(tsample_t)(tile/td->td_stripsperimage))); |
|
} |
|
|
|
static int |
|
TIFFCheckRead(TIFF* tif, int tiles) |
|
{ |
|
if (tif->tif_mode == O_WRONLY) { |
|
TIFFError(tif->tif_name, "File not open for reading"); |
|
return (0); |
|
} |
|
if (tiles ^ isTiled(tif)) { |
|
TIFFError(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, tidata_t buf, tsize_t cc) |
|
{ |
|
(void) tif; (void) buf; (void) cc; |
|
} |
|
|
|
void |
|
_TIFFSwab16BitData(TIFF* tif, tidata_t buf, tsize_t cc) |
|
{ |
|
(void) tif; |
|
assert((cc & 1) == 0); |
|
TIFFSwabArrayOfShort((uint16*) buf, cc/2); |
|
} |
|
|
|
void |
|
_TIFFSwab32BitData(TIFF* tif, tidata_t buf, tsize_t cc) |
|
{ |
|
(void) tif; |
|
assert((cc & 3) == 0); |
|
TIFFSwabArrayOfLong((uint32*) buf, cc/4); |
|
} |
|
|
|
void |
|
_TIFFSwab64BitData(TIFF* tif, tidata_t buf, tsize_t cc) |
|
{ |
|
(void) tif; |
|
assert((cc & 7) == 0); |
|
TIFFSwabArrayOfDouble((double*) buf, cc/8); |
|
} |
|
|
|
/* vim: set ts=8 sts=8 sw=8 noet: */
|
|
|