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Diffstat (limited to 'third_party/libtiff/tif_strip.c')
| -rw-r--r-- | third_party/libtiff/tif_strip.c | 389 |
1 files changed, 389 insertions, 0 deletions
diff --git a/third_party/libtiff/tif_strip.c b/third_party/libtiff/tif_strip.c new file mode 100644 index 0000000000..6cac71dd92 --- /dev/null +++ b/third_party/libtiff/tif_strip.c @@ -0,0 +1,389 @@ +/* $Id: tif_strip.c,v 1.36 2015-06-07 22:35:40 bfriesen 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); + } + if (scanline_size == 0) + { + TIFFErrorExt(tif->tif_clientdata,module,"Computed scanline size is zero"); + return 0; + } + 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: + */ |