diff options
Diffstat (limited to 'tiff/libtiff/tif_tile.c')
| -rw-r--r-- | tiff/libtiff/tif_tile.c | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/tiff/libtiff/tif_tile.c b/tiff/libtiff/tif_tile.c deleted file mode 100644 index d8379e6..0000000 --- a/tiff/libtiff/tif_tile.c +++ /dev/null @@ -1,280 +0,0 @@ -/* $Id: tif_tile.c,v 1.12.2.1 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. - * - * Tiled 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, because 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 tile an (x,y,z,s) value is in. - */ -ttile_t -TIFFComputeTile(TIFF* tif, uint32 x, uint32 y, uint32 z, tsample_t s) -{ - TIFFDirectory *td = &tif->tif_dir; - uint32 dx = td->td_tilewidth; - uint32 dy = td->td_tilelength; - uint32 dz = td->td_tiledepth; - ttile_t 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(td->td_imagewidth, dx); - uint32 ypt = TIFFhowmany(td->td_imagelength, dy); - uint32 zpt = TIFFhowmany(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, tsample_t 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. - */ -ttile_t -TIFFNumberOfTiles(TIFF* tif) -{ - TIFFDirectory *td = &tif->tif_dir; - uint32 dx = td->td_tilewidth; - uint32 dy = td->td_tilelength; - uint32 dz = td->td_tiledepth; - ttile_t 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 : - multiply(tif, multiply(tif, TIFFhowmany(td->td_imagewidth, dx), - TIFFhowmany(td->td_imagelength, dy), - "TIFFNumberOfTiles"), - TIFFhowmany(td->td_imagedepth, dz), "TIFFNumberOfTiles"); - if (td->td_planarconfig == PLANARCONFIG_SEPARATE) - ntiles = multiply(tif, ntiles, td->td_samplesperpixel, - "TIFFNumberOfTiles"); - return (ntiles); -} - -/* - * Compute the # bytes in each row of a tile. - */ -tsize_t -TIFFTileRowSize(TIFF* tif) -{ - TIFFDirectory *td = &tif->tif_dir; - tsize_t rowsize; - - if (td->td_tilelength == 0 || td->td_tilewidth == 0) - return ((tsize_t) 0); - rowsize = multiply(tif, td->td_bitspersample, td->td_tilewidth, - "TIFFTileRowSize"); - if (td->td_planarconfig == PLANARCONFIG_CONTIG) - rowsize = multiply(tif, rowsize, td->td_samplesperpixel, - "TIFFTileRowSize"); - return ((tsize_t) TIFFhowmany8(rowsize)); -} - -/* - * Compute the # bytes in a variable length, row-aligned tile. - */ -tsize_t -TIFFVTileSize(TIFF* tif, uint32 nrows) -{ - TIFFDirectory *td = &tif->tif_dir; - tsize_t tilesize; - - if (td->td_tilelength == 0 || td->td_tilewidth == 0 || - td->td_tiledepth == 0) - return ((tsize_t) 0); - 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. - */ - tsize_t w = - TIFFroundup(td->td_tilewidth, td->td_ycbcrsubsampling[0]); - tsize_t rowsize = - TIFFhowmany8(multiply(tif, w, td->td_bitspersample, - "TIFFVTileSize")); - tsize_t samplingarea = - td->td_ycbcrsubsampling[0]*td->td_ycbcrsubsampling[1]; - if (samplingarea == 0) { - TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Invalid YCbCr subsampling"); - return 0; - } - nrows = TIFFroundup(nrows, td->td_ycbcrsubsampling[1]); - /* NB: don't need TIFFhowmany here 'cuz everything is rounded */ - tilesize = multiply(tif, nrows, rowsize, "TIFFVTileSize"); - tilesize = summarize(tif, tilesize, - multiply(tif, 2, tilesize / samplingarea, - "TIFFVTileSize"), - "TIFFVTileSize"); - } else - tilesize = multiply(tif, nrows, TIFFTileRowSize(tif), - "TIFFVTileSize"); - return ((tsize_t) - multiply(tif, tilesize, td->td_tiledepth, "TIFFVTileSize")); -} - -/* - * Compute the # bytes in a row-aligned tile. - */ -tsize_t -TIFFTileSize(TIFF* tif) -{ - return (TIFFVTileSize(tif, tif->tif_dir.td_tilelength)); -} - -/* - * 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(*tw, 16); - if (*th & 0xf) - *th = TIFFroundup(*th, 16); -} - -/* vim: set ts=8 sts=8 sw=8 noet: */ -/* - * Local Variables: - * mode: c - * c-basic-offset: 8 - * fill-column: 78 - * End: - */ |