diff options
Diffstat (limited to 'tiff/libtiff/tif_strip.c')
| -rw-r--r-- | tiff/libtiff/tif_strip.c | 370 |
1 files changed, 0 insertions, 370 deletions
diff --git a/tiff/libtiff/tif_strip.c b/tiff/libtiff/tif_strip.c deleted file mode 100644 index 63dec6b..0000000 --- a/tiff/libtiff/tif_strip.c +++ /dev/null @@ -1,370 +0,0 @@ -/* $Id: tif_strip.c,v 1.19.2.1 2010-06-08 18:50:43 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" - -static uint32 -summarize(TIFF* tif, size_t summand1, size_t summand2, const char* where) -{ - /* - * XXX: We are using casting to uint32 here, bacause sizeof(size_t) - * may be larger than sizeof(uint32) on 64-bit architectures. - */ - uint32 bytes = summand1 + summand2; - - if (bytes - summand1 != summand2) { - TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Integer overflow in %s", where); - bytes = 0; - } - - return (bytes); -} - -static uint32 -multiply(TIFF* tif, size_t nmemb, size_t elem_size, const char* where) -{ - uint32 bytes = nmemb * elem_size; - - if (elem_size && bytes / elem_size != nmemb) { - TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Integer overflow in %s", where); - bytes = 0; - } - - return (bytes); -} - -/* - * Compute which strip a (row,sample) value is in. - */ -tstrip_t -TIFFComputeStrip(TIFF* tif, uint32 row, tsample_t sample) -{ - TIFFDirectory *td = &tif->tif_dir; - tstrip_t strip; - - strip = row / td->td_rowsperstrip; - if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { - if (sample >= td->td_samplesperpixel) { - TIFFErrorExt(tif->tif_clientdata, tif->tif_name, - "%lu: Sample out of range, max %lu", - (unsigned long) sample, (unsigned long) td->td_samplesperpixel); - return ((tstrip_t) 0); - } - strip += sample*td->td_stripsperimage; - } - return (strip); -} - -/* - * Compute how many strips are in an image. - */ -tstrip_t -TIFFNumberOfStrips(TIFF* tif) -{ - TIFFDirectory *td = &tif->tif_dir; - tstrip_t nstrips; - - nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 : - TIFFhowmany(td->td_imagelength, td->td_rowsperstrip)); - if (td->td_planarconfig == PLANARCONFIG_SEPARATE) - nstrips = multiply(tif, nstrips, td->td_samplesperpixel, - "TIFFNumberOfStrips"); - return (nstrips); -} - -/* - * Compute the # bytes in a variable height, row-aligned strip. - */ -tsize_t -TIFFVStripSize(TIFF* tif, uint32 nrows) -{ - 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]; - tsize_t w, scanline, samplingarea; - - TIFFGetField( tif, TIFFTAG_YCBCRSUBSAMPLING, - ycbcrsubsampling + 0, - ycbcrsubsampling + 1 ); - - samplingarea = ycbcrsubsampling[0]*ycbcrsubsampling[1]; - if (samplingarea == 0) { - TIFFErrorExt(tif->tif_clientdata, tif->tif_name, - "Invalid YCbCr subsampling"); - return 0; - } - - w = TIFFroundup(td->td_imagewidth, ycbcrsubsampling[0]); - scanline = TIFFhowmany8(multiply(tif, w, td->td_bitspersample, - "TIFFVStripSize")); - nrows = TIFFroundup(nrows, ycbcrsubsampling[1]); - /* NB: don't need TIFFhowmany here 'cuz everything is rounded */ - scanline = multiply(tif, nrows, scanline, "TIFFVStripSize"); - return ((tsize_t) - summarize(tif, scanline, - multiply(tif, 2, scanline / samplingarea, - "TIFFVStripSize"), "TIFFVStripSize")); - } else - return ((tsize_t) multiply(tif, nrows, TIFFScanlineSize(tif), - "TIFFVStripSize")); -} - - -/* - * Compute the # bytes in a raw strip. - */ -tsize_t -TIFFRawStripSize(TIFF* tif, tstrip_t strip) -{ - TIFFDirectory* td = &tif->tif_dir; - tsize_t 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); - bytecount = (tsize_t) -1; - } - - return bytecount; -} - -/* - * 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. - */ -tsize_t -TIFFStripSize(TIFF* tif) -{ - TIFFDirectory* td = &tif->tif_dir; - uint32 rps = td->td_rowsperstrip; - if (rps > td->td_imagelength) - rps = td->td_imagelength; - return (TIFFVStripSize(tif, rps)); -} - -/* - * 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. - */ - tsize_t scanline = TIFFScanlineSize(tif); - s = (uint32)STRIP_SIZE_DEFAULT / (scanline == 0 ? 1 : scanline); - if (s == 0) /* very wide images */ - s = 1; - } - 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. - */ -tsize_t -TIFFScanlineSize(TIFF* tif) -{ - TIFFDirectory *td = &tif->tif_dir; - tsize_t scanline; - - if (td->td_planarconfig == PLANARCONFIG_CONTIG) { - if (td->td_photometric == PHOTOMETRIC_YCBCR - && !isUpSampled(tif)) { - uint16 ycbcrsubsampling[2]; - - TIFFGetField(tif, TIFFTAG_YCBCRSUBSAMPLING, - ycbcrsubsampling + 0, - ycbcrsubsampling + 1); - - if (ycbcrsubsampling[0] == 0) { - TIFFErrorExt(tif->tif_clientdata, tif->tif_name, - "Invalid YCbCr subsampling"); - return 0; - } - - scanline = TIFFroundup(td->td_imagewidth, - ycbcrsubsampling[0]); - scanline = TIFFhowmany8(multiply(tif, scanline, - td->td_bitspersample, - "TIFFScanlineSize")); - return ((tsize_t) - summarize(tif, scanline, - multiply(tif, 2, - scanline / ycbcrsubsampling[0], - "TIFFVStripSize"), - "TIFFVStripSize")); - } else { - scanline = multiply(tif, td->td_imagewidth, - td->td_samplesperpixel, - "TIFFScanlineSize"); - } - } else - scanline = td->td_imagewidth; - return ((tsize_t) TIFFhowmany8(multiply(tif, scanline, - td->td_bitspersample, - "TIFFScanlineSize"))); -} - -/* - * Some stuff depends on this older version of TIFFScanlineSize - * TODO: resolve this - */ -tsize_t -TIFFOldScanlineSize(TIFF* tif) -{ - TIFFDirectory *td = &tif->tif_dir; - tsize_t scanline; - - scanline = multiply (tif, td->td_bitspersample, td->td_imagewidth, - "TIFFScanlineSize"); - if (td->td_planarconfig == PLANARCONFIG_CONTIG) - scanline = multiply (tif, scanline, td->td_samplesperpixel, - "TIFFScanlineSize"); - return ((tsize_t) TIFFhowmany8(scanline)); -} - -/* - * 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. - * Some stuff depends on this newer version of TIFFScanlineSize - * TODO: resolve this - */ -tsize_t -TIFFNewScanlineSize(TIFF* tif) -{ - TIFFDirectory *td = &tif->tif_dir; - tsize_t scanline; - - if (td->td_planarconfig == PLANARCONFIG_CONTIG) { - if (td->td_photometric == PHOTOMETRIC_YCBCR - && !isUpSampled(tif)) { - uint16 ycbcrsubsampling[2]; - - TIFFGetField(tif, TIFFTAG_YCBCRSUBSAMPLING, - ycbcrsubsampling + 0, - ycbcrsubsampling + 1); - - if (ycbcrsubsampling[0]*ycbcrsubsampling[1] == 0) { - TIFFErrorExt(tif->tif_clientdata, tif->tif_name, - "Invalid YCbCr subsampling"); - return 0; - } - - return((tsize_t) ((((td->td_imagewidth+ycbcrsubsampling[0]-1) - /ycbcrsubsampling[0]) - *(ycbcrsubsampling[0]*ycbcrsubsampling[1]+2) - *td->td_bitspersample+7) - /8)/ycbcrsubsampling[1]); - - } else { - scanline = multiply(tif, td->td_imagewidth, - td->td_samplesperpixel, - "TIFFScanlineSize"); - } - } else - scanline = td->td_imagewidth; - return ((tsize_t) TIFFhowmany8(multiply(tif, scanline, - td->td_bitspersample, - "TIFFScanlineSize"))); -} - -/* - * 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). - */ -tsize_t -TIFFRasterScanlineSize(TIFF* tif) -{ - TIFFDirectory *td = &tif->tif_dir; - tsize_t scanline; - - scanline = multiply (tif, td->td_bitspersample, td->td_imagewidth, - "TIFFRasterScanlineSize"); - if (td->td_planarconfig == PLANARCONFIG_CONTIG) { - scanline = multiply (tif, scanline, td->td_samplesperpixel, - "TIFFRasterScanlineSize"); - return ((tsize_t) TIFFhowmany8(scanline)); - } else - return ((tsize_t) multiply (tif, TIFFhowmany8(scanline), - td->td_samplesperpixel, - "TIFFRasterScanlineSize")); -} - -/* vim: set ts=8 sts=8 sw=8 noet: */ -/* - * Local Variables: - * mode: c - * c-basic-offset: 8 - * fill-column: 78 - * End: - */ |