/* $Id: tif_strip.c,v 1.35 2012-06-06 05:33:55 fwarmerdam Exp $ */
/*
* Copyright (c) 1991-1997 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.
*
* Strip-organized Image Support Routines.
*/
#include "tiffiop.h"
/*
* Compute which strip a (row,sample) value is in.
*/
uint32
TIFFComputeStrip(TIFF* tif, uint32 row, uint16 sample)
{
static const char module[] = "TIFFComputeStrip";
TIFFDirectory *td = &tif->tif_dir;
uint32 strip;
strip = row / td->td_rowsperstrip;
if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
if (sample >= td->td_samplesperpixel) {
TIFFErrorExt(tif->tif_clientdata, module,
"%lu: Sample out of range, max %lu",
(unsigned long) sample, (unsigned long) td->td_samplesperpixel);
return (0);
}
strip += (uint32)sample*td->td_stripsperimage;
}
return (strip);
}
/*
* Compute how many strips are in an image.
*/
uint32
TIFFNumberOfStrips(TIFF* tif)
{
TIFFDirectory *td = &tif->tif_dir;
uint32 nstrips;
nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 :
TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip));
if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
nstrips = _TIFFMultiply32(tif, nstrips, (uint32)td->td_samplesperpixel,
"TIFFNumberOfStrips");
return (nstrips);
}
/*
* Compute the # bytes in a variable height, row-aligned strip.
*/
uint64
TIFFVStripSize64(TIFF* tif, uint32 nrows)
{
static const char module[] = "TIFFVStripSize64";
TIFFDirectory *td = &tif->tif_dir;
if (nrows==(uint32)(-1))
nrows=td->td_imagelength;
if ((td->td_planarconfig==PLANARCONFIG_CONTIG)&&
(td->td_photometric == PHOTOMETRIC_YCBCR)&&
(!isUpSampled(tif)))
{
/*
* Packed YCbCr data contain one Cb+Cr for every
* HorizontalSampling*VerticalSampling Y values.
* Must also roundup width and height when calculating
* since images that are not a multiple of the
* horizontal/vertical subsampling area include
* YCbCr data for the extended image.
*/
uint16 ycbcrsubsampling[2];
uint16 samplingblock_samples;
uint32 samplingblocks_hor;
uint32 samplingblocks_ver;
uint64 samplingrow_samples;
uint64 samplingrow_size;
if(td->td_samplesperpixel!=3)
{
TIFFErrorExt(tif->tif_clientdata,module,
"Invalid td_samplesperpixel value");
return 0;
}
TIFFGetFieldDefaulted(tif,TIFFTAG_YCBCRSUBSAMPLING,ycbcrsubsampling+0,
ycbcrsubsampling+1);
if ((ycbcrsubsampling[0] != 1 && ycbcrsubsampling[0] != 2 && ycbcrsubsampling[0] != 4)
||(ycbcrsubsampling[1] != 1 && ycbcrsubsampling[1] != 2 && ycbcrsubsampling[1] != 4))
{
TIFFErrorExt(tif->tif_clientdata,module,
"Invalid YCbCr subsampling (%dx%d)",
ycbcrsubsampling[0],
ycbcrsubsampling[1] );
return 0;
}
samplingblock_samples=ycbcrsubsampling[0]*ycbcrsubsampling[1]+2;
samplingblocks_hor=TIFFhowmany_32(td->td_imagewidth,ycbcrsubsampling[0]);
samplingblocks_ver=TIFFhowmany_32(nrows,ycbcrsubsampling[1]);
samplingrow_samples=_TIFFMultiply64(tif,samplingblocks_hor,samplingblock_samples,module);
samplingrow_size=TIFFhowmany8_64(_TIFFMultiply64(tif,samplingrow_samples,td->td_bitspersample,module));
return(_TIFFMultiply64(tif,samplingrow_size,samplingblocks_ver,module));
}
else
return(_TIFFMultiply64(tif,nrows,TIFFScanlineSize64(tif),module));
}
tmsize_t
TIFFVStripSize(TIFF* tif, uint32 nrows)
{
static const char module[] = "TIFFVStripSize";
uint64 m;
tmsize_t n;
m=TIFFVStripSize64(tif,nrows);
n=(tmsize_t)m;
if ((uint64)n!=m)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
n=0;
}
return(n);
}
/*
* Compute the # bytes in a raw strip.
*/
uint64
TIFFRawStripSize64(TIFF* tif, uint32 strip)
{
static const char module[] = "TIFFRawStripSize64";
TIFFDirectory* td = &tif->tif_dir;
uint64 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
bytecount = (uint64) -1;
}
return bytecount;
}
tmsize_t
TIFFRawStripSize(TIFF* tif, uint32 strip)
{
static const char module[] = "TIFFRawStripSize";
uint64 m;
tmsize_t n;
m=TIFFRawStripSize64(tif,strip);
if (m==(uint64)(-1))
n=(tmsize_t)(-1);
else
{
n=(tmsize_t)m;
if ((uint64)n!=m)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
n=0;
}
}
return(n);
}
/*
* Compute the # bytes in a (row-aligned) strip.
*
* Note that if RowsPerStrip is larger than the
* recorded ImageLength, then the strip size is
* truncated to reflect the actual space required
* to hold the strip.
*/
uint64
TIFFStripSize64(TIFF* tif)
{
TIFFDirectory* td = &tif->tif_dir;
uint32 rps = td->td_rowsperstrip;
if (rps > td->td_imagelength)
rps = td->td_imagelength;
return (TIFFVStripSize64(tif, rps));
}
tmsize_t
TIFFStripSize(TIFF* tif)
{
static const char module[] = "TIFFStripSize";
uint64 m;
tmsize_t n;
m=TIFFStripSize64(tif);
n=(tmsize_t)m;
if ((uint64)n!=m)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
n=0;
}
return(n);
}
/*
* Compute a default strip size based on the image
* characteristics and a requested value. If the
* request is <1 then we choose a strip size according
* to certain heuristics.
*/
uint32
TIFFDefaultStripSize(TIFF* tif, uint32 request)
{
return (*tif->tif_defstripsize)(tif, request);
}
uint32
_TIFFDefaultStripSize(TIFF* tif, uint32 s)
{
if ((int32) s < 1) {
/*
* If RowsPerStrip is unspecified, try to break the
* image up into strips that are approximately
* STRIP_SIZE_DEFAULT bytes long.
*/
uint64 scanlinesize;
uint64 rows;
scanlinesize=TIFFScanlineSize64(tif);
if (scanlinesize==0)
scanlinesize=1;
rows=(uint64)STRIP_SIZE_DEFAULT/scanlinesize;
if (rows==0)
rows=1;
else if (rows>0xFFFFFFFF)
rows=0xFFFFFFFF;
s=(uint32)rows;
}
return (s);
}
/*
* Return the number of bytes to read/write in a call to
* one of the scanline-oriented i/o routines. Note that
* this number may be 1/samples-per-pixel if data is
* stored as separate planes.
* The ScanlineSize in case of YCbCrSubsampling is defined as the
* strip size divided by the strip height, i.e. the size of a pack of vertical
* subsampling lines divided by vertical subsampling. It should thus make
* sense when multiplied by a multiple of vertical subsampling.
*/
uint64
TIFFScanlineSize64(TIFF* tif)
{
static const char module[] = "TIFFScanlineSize64";
TIFFDirectory *td = &tif->tif_dir;
uint64 scanline_size;
if (td->td_planarconfig==PLANARCONFIG_CONTIG)
{
if ((td->td_photometric==PHOTOMETRIC_YCBCR)&&
(td->td_samplesperpixel==3)&&
(!isUpSampled(tif)))
{
uint16 ycbcrsubsampling[2];
uint16 samplingblock_samples;
uint32 samplingblocks_hor;
uint64 samplingrow_samples;
uint64 samplingrow_size;
if(td->td_samplesperpixel!=3)
{
TIFFErrorExt(tif->tif_clientdata,module,
"Invalid td_samplesperpixel value");
return 0;
}
TIFFGetFieldDefaulted(tif,TIFFTAG_YCBCRSUBSAMPLING,
ycbcrsubsampling+0,
ycbcrsubsampling+1);
if (((ycbcrsubsampling[0]!=1)&&(ycbcrsubsampling[0]!=2)&&(ycbcrsubsampling[0]!=4)) ||
((ycbcrsubsampling[1]!=1)&&(ycbcrsubsampling[1]!=2)&&(ycbcrsubsampling[1]!=4)))
{
TIFFErrorExt(tif->tif_clientdata,module,
"Invalid YCbCr subsampling");
return 0;
}
samplingblock_samples = ycbcrsubsampling[0]*ycbcrsubsampling[1]+2;
samplingblocks_hor = TIFFhowmany_32(td->td_imagewidth,ycbcrsubsampling[0]);
samplingrow_samples = _TIFFMultiply64(tif,samplingblocks_hor,samplingblock_samples,module);
samplingrow_size = TIFFhowmany_64(_TIFFMultiply64(tif,samplingrow_samples,td->td_bitspersample,module),8);
scanline_size = (samplingrow_size/ycbcrsubsampling[1]);
}
else
{
uint64 scanline_samples;
scanline_samples=_TIFFMultiply64(tif,td->td_imagewidth,td->td_samplesperpixel,module);
scanline_size=TIFFhowmany_64(_TIFFMultiply64(tif,scanline_samples,td->td_bitspersample,module),8);
}
}
else
scanline_size=TIFFhowmany_64(_TIFFMultiply64(tif,td->td_imagewidth,td->td_bitspersample,module),8);
return(scanline_size);
}
tmsize_t
TIFFScanlineSize(TIFF* tif)
{
static const char module[] = "TIFFScanlineSize";
uint64 m;
tmsize_t n;
m=TIFFScanlineSize64(tif);
n=(tmsize_t)m;
if ((uint64)n!=m)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer arithmetic overflow");
n=0;
}
return(n);
}
/*
* Return the number of bytes required to store a complete
* decoded and packed raster scanline (as opposed to the
* I/O size returned by TIFFScanlineSize which may be less
* if data is store as separate planes).
*/
uint64
TIFFRasterScanlineSize64(TIFF* tif)
{
static const char module[] = "TIFFRasterScanlineSize64";
TIFFDirectory *td = &tif->tif_dir;
uint64 scanline;
scanline = _TIFFMultiply64(tif, td->td_bitspersample, td->td_imagewidth, module);
if (td->td_planarconfig == PLANARCONFIG_CONTIG) {
scanline = _TIFFMultiply64(tif, scanline, td->td_samplesperpixel, module);
return (TIFFhowmany8_64(scanline));
} else
return (_TIFFMultiply64(tif, TIFFhowmany8_64(scanline),
td->td_samplesperpixel, module));
}
tmsize_t
TIFFRasterScanlineSize(TIFF* tif)
{
static const char module[] = "TIFFRasterScanlineSize";
uint64 m;
tmsize_t n;
m=TIFFRasterScanlineSize64(tif);
n=(tmsize_t)m;
if ((uint64)n!=m)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer arithmetic overflow");
n=0;
}
return(n);
}
/* vim: set ts=8 sts=8 sw=8 noet: */
/*
* Local Variables:
* mode: c
* c-basic-offset: 8
* fill-column: 78
* End:
*/