From 9491825ddff7a294d1f49061bae7044e426aeb2e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Fri, 6 Nov 2015 05:38:49 +0100 Subject: Imported Upstream version 1.8.3 --- tiff/libtiff/tif_tile.c | 299 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 299 insertions(+) create mode 100755 tiff/libtiff/tif_tile.c (limited to 'tiff/libtiff/tif_tile.c') diff --git a/tiff/libtiff/tif_tile.c b/tiff/libtiff/tif_tile.c new file mode 100755 index 0000000..0ff7e85 --- /dev/null +++ b/tiff/libtiff/tif_tile.c @@ -0,0 +1,299 @@ +/* $Id: tif_tile.c,v 1.23 2012-06-06 05:33:55 fwarmerdam 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. + * + * Tiled Image Support Routines. + */ +#include "tiffiop.h" + +/* + * Compute which tile an (x,y,z,s) value is in. + */ +uint32 +TIFFComputeTile(TIFF* tif, uint32 x, uint32 y, uint32 z, uint16 s) +{ + TIFFDirectory *td = &tif->tif_dir; + uint32 dx = td->td_tilewidth; + uint32 dy = td->td_tilelength; + uint32 dz = td->td_tiledepth; + uint32 tile = 1; + + if (td->td_imagedepth == 1) + z = 0; + if (dx == (uint32) -1) + dx = td->td_imagewidth; + if (dy == (uint32) -1) + dy = td->td_imagelength; + if (dz == (uint32) -1) + dz = td->td_imagedepth; + if (dx != 0 && dy != 0 && dz != 0) { + uint32 xpt = TIFFhowmany_32(td->td_imagewidth, dx); + uint32 ypt = TIFFhowmany_32(td->td_imagelength, dy); + uint32 zpt = TIFFhowmany_32(td->td_imagedepth, dz); + + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) + tile = (xpt*ypt*zpt)*s + + (xpt*ypt)*(z/dz) + + xpt*(y/dy) + + x/dx; + else + tile = (xpt*ypt)*(z/dz) + xpt*(y/dy) + x/dx; + } + return (tile); +} + +/* + * Check an (x,y,z,s) coordinate + * against the image bounds. + */ +int +TIFFCheckTile(TIFF* tif, uint32 x, uint32 y, uint32 z, uint16 s) +{ + TIFFDirectory *td = &tif->tif_dir; + + if (x >= td->td_imagewidth) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "%lu: Col out of range, max %lu", + (unsigned long) x, + (unsigned long) (td->td_imagewidth - 1)); + return (0); + } + if (y >= td->td_imagelength) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "%lu: Row out of range, max %lu", + (unsigned long) y, + (unsigned long) (td->td_imagelength - 1)); + return (0); + } + if (z >= td->td_imagedepth) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "%lu: Depth out of range, max %lu", + (unsigned long) z, + (unsigned long) (td->td_imagedepth - 1)); + return (0); + } + if (td->td_planarconfig == PLANARCONFIG_SEPARATE && + s >= td->td_samplesperpixel) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "%lu: Sample out of range, max %lu", + (unsigned long) s, + (unsigned long) (td->td_samplesperpixel - 1)); + return (0); + } + return (1); +} + +/* + * Compute how many tiles are in an image. + */ +uint32 +TIFFNumberOfTiles(TIFF* tif) +{ + TIFFDirectory *td = &tif->tif_dir; + uint32 dx = td->td_tilewidth; + uint32 dy = td->td_tilelength; + uint32 dz = td->td_tiledepth; + uint32 ntiles; + + if (dx == (uint32) -1) + dx = td->td_imagewidth; + if (dy == (uint32) -1) + dy = td->td_imagelength; + if (dz == (uint32) -1) + dz = td->td_imagedepth; + ntiles = (dx == 0 || dy == 0 || dz == 0) ? 0 : + _TIFFMultiply32(tif, _TIFFMultiply32(tif, TIFFhowmany_32(td->td_imagewidth, dx), + TIFFhowmany_32(td->td_imagelength, dy), + "TIFFNumberOfTiles"), + TIFFhowmany_32(td->td_imagedepth, dz), "TIFFNumberOfTiles"); + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) + ntiles = _TIFFMultiply32(tif, ntiles, td->td_samplesperpixel, + "TIFFNumberOfTiles"); + return (ntiles); +} + +/* + * Compute the # bytes in each row of a tile. + */ +uint64 +TIFFTileRowSize64(TIFF* tif) +{ + TIFFDirectory *td = &tif->tif_dir; + uint64 rowsize; + + if (td->td_tilelength == 0 || td->td_tilewidth == 0) + return (0); + rowsize = _TIFFMultiply64(tif, td->td_bitspersample, td->td_tilewidth, + "TIFFTileRowSize"); + if (td->td_planarconfig == PLANARCONFIG_CONTIG) + rowsize = _TIFFMultiply64(tif, rowsize, td->td_samplesperpixel, + "TIFFTileRowSize"); + return (TIFFhowmany8_64(rowsize)); +} +tmsize_t +TIFFTileRowSize(TIFF* tif) +{ + static const char module[] = "TIFFTileRowSize"; + uint64 m; + tmsize_t n; + m=TIFFTileRowSize64(tif); + n=(tmsize_t)m; + if ((uint64)n!=m) + { + TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); + n=0; + } + return(n); +} + +/* + * Compute the # bytes in a variable length, row-aligned tile. + */ +uint64 +TIFFVTileSize64(TIFF* tif, uint32 nrows) +{ + static const char module[] = "TIFFVTileSize64"; + TIFFDirectory *td = &tif->tif_dir; + if (td->td_tilelength == 0 || td->td_tilewidth == 0 || + td->td_tiledepth == 0) + return (0); + if ((td->td_planarconfig==PLANARCONFIG_CONTIG)&& + (td->td_photometric==PHOTOMETRIC_YCBCR)&& + (td->td_samplesperpixel==3)&& + (!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; + 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_tilewidth,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,TIFFTileRowSize64(tif),module)); +} +tmsize_t +TIFFVTileSize(TIFF* tif, uint32 nrows) +{ + static const char module[] = "TIFFVTileSize"; + uint64 m; + tmsize_t n; + m=TIFFVTileSize64(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 row-aligned tile. + */ +uint64 +TIFFTileSize64(TIFF* tif) +{ + return (TIFFVTileSize64(tif, tif->tif_dir.td_tilelength)); +} +tmsize_t +TIFFTileSize(TIFF* tif) +{ + static const char module[] = "TIFFTileSize"; + uint64 m; + tmsize_t n; + m=TIFFTileSize64(tif); + n=(tmsize_t)m; + if ((uint64)n!=m) + { + TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); + n=0; + } + return(n); +} + +/* + * Compute a default tile size based on the image + * characteristics and a requested value. If a + * request is <1 then we choose a size according + * to certain heuristics. + */ +void +TIFFDefaultTileSize(TIFF* tif, uint32* tw, uint32* th) +{ + (*tif->tif_deftilesize)(tif, tw, th); +} + +void +_TIFFDefaultTileSize(TIFF* tif, uint32* tw, uint32* th) +{ + (void) tif; + if (*(int32*) tw < 1) + *tw = 256; + if (*(int32*) th < 1) + *th = 256; + /* roundup to a multiple of 16 per the spec */ + if (*tw & 0xf) + *tw = TIFFroundup_32(*tw, 16); + if (*th & 0xf) + *th = TIFFroundup_32(*th, 16); +} + +/* vim: set ts=8 sts=8 sw=8 noet: */ +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ -- cgit v1.2.3