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-rwxr-xr-xtiff/libtiff/tif_tile.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/tiff/libtiff/tif_tile.c b/tiff/libtiff/tif_tile.c
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+++ b/tiff/libtiff/tif_tile.c
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+/* $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:
+ */
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