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-rw-r--r--third_party/libtiff/tif_strip.c389
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diff --git a/third_party/libtiff/tif_strip.c b/third_party/libtiff/tif_strip.c
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+/* $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:
+ */