/*
* 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));
}
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);
tif->tif_row++;
if (e)
(*tif->tif_postdecode)(tif, (tidata_t) buf,
tif->tif_scanlinesize);
}
return (e > 0 ? 1 : -1);
}
/*
* 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 ((int64)bytecount <= 0) {
TIFFErrorExt(tif->tif_clientdata, module,
TIFF_UINT64_FORMAT ": Invalid strip byte count, strip %lu",
(TIFF_UINT64_T) bytecount,
(unsigned long) strip);
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 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;
/*
* FIXME: butecount should have tsize_t type, but for now libtiff
* defines tsize_t as a signed 32-bit integer and we are losing
* ability to read arrays larger than 2^31 bytes. So we are using
* uint32 instead of tsize_t here.
*/
uint32 bytecount;
if (!TIFFCheckRead(tif, 0))
return ((tsize_t) -1);
if (strip >= td->td_nstrips) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"%lu: Strip out of range, max %lu",
(unsigned long) strip,
(unsigned long) td->td_nstrips);
return ((tsize_t) -1);
}
if (tif->tif_flags&TIFF_NOREADRAW)
{
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Compression scheme does not support access to raw uncompressed data");
return ((tsize_t) -1);
}
bytecount = td->td_stripbytecount[strip];
if (bytecount <= 0) {
TIFFErrorExt(tif->tif_clientdata, 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 && (uint32)size < bytecount)
bytecount = size;
return (TIFFReadRawStrip1(tif, strip, buf, bytecount, module));
}
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 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, (u_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, buf, size, tile/td->td_stripsperimage)) {
(*tif->tif_postdecode)(tif, buf, size);
return (size);
} else
return (-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;
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= TIFFhowmany_32_maxuint_compat(td->td_imagelength, rowsperstrip);
stripinplane=(strip%stripsperplane);
plane=(uint16)(strip/stripsperplane);
rows=td->td_imagelength-stripinplane*rowsperstrip;
if (rows>rowsperstrip)
rows=rowsperstrip;
stripsize=TIFFVStripSize(tif,rows);
if (stripsize==0)
return((tmsize_t)(-1));
/* shortcut to avoid an extra memcpy() */
if( td->td_compression == COMPRESSION_NONE &&
size!=(tmsize_t)(-1) && size >= stripsize &&
!isMapped(tif) &&
((tif->tif_flags&TIFF_NOREADRAW)==0) )
{
if (TIFFReadRawStrip1(tif, strip, buf, stripsize, module) != stripsize)
return ((tmsize_t)(-1));
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits(buf,stripsize);
(*tif->tif_postdecode)(tif,buf,stripsize);
return (stripsize);
}
if ((size!=(tmsize_t)(-1))&&(size<stripsize))
stripsize=size;
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);
}
