chromium/third_party/pdfium/third_party/libtiff/tif_strip.c

/*
 * 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_t TIFFComputeStrip(TIFF *tif, uint32_t row, uint16_t sample)
{ … }

/*
 * Compute how many strips are in an image.
 */
uint32_t TIFFNumberOfStrips(TIFF *tif)
{ … }

/*
 * Compute the # bytes in a variable height, row-aligned strip.
 */
uint64_t TIFFVStripSize64(TIFF *tif, uint32_t nrows)
{ … }
tmsize_t TIFFVStripSize(TIFF *tif, uint32_t nrows)
{ … }

/*
 * Compute the # bytes in a raw strip.
 */
uint64_t TIFFRawStripSize64(TIFF *tif, uint32_t strip)
{ … }
tmsize_t TIFFRawStripSize(TIFF *tif, uint32_t strip)
{ … }

/*
 * 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_t TIFFStripSize64(TIFF *tif)
{ … }
tmsize_t TIFFStripSize(TIFF *tif)
{ … }

/*
 * 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_t TIFFDefaultStripSize(TIFF *tif, uint32_t request)
{ … }

uint32_t _TIFFDefaultStripSize(TIFF *tif, uint32_t 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_t TIFFScanlineSize64(TIFF *tif)
{ … }
tmsize_t TIFFScanlineSize(TIFF *tif)
{ … }

/*
 * 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_t TIFFRasterScanlineSize64(TIFF *tif)
{ … }
tmsize_t TIFFRasterScanlineSize(TIFF *tif)
{ … }