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