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298 lines
8.1 KiB
298 lines
8.1 KiB
/* $Id: tif_tile.c,v 1.22 2010-07-01 15:33:28 dron Exp $ */ |
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/* |
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* Copyright (c) 1991-1997 Sam Leffler |
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* Copyright (c) 1991-1997 Silicon Graphics, Inc. |
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* |
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* Permission to use, copy, modify, distribute, and sell this software and |
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* its documentation for any purpose is hereby granted without fee, provided |
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* that (i) the above copyright notices and this permission notice appear in |
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* all copies of the software and related documentation, and (ii) the names of |
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* Sam Leffler and Silicon Graphics may not be used in any advertising or |
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* publicity relating to the software without the specific, prior written |
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* permission of Sam Leffler and Silicon Graphics. |
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* |
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY |
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
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* |
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR |
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, |
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF |
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
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* OF THIS SOFTWARE. |
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*/ |
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/* |
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* TIFF Library. |
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* |
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* Tiled Image Support Routines. |
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*/ |
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#include "tiffiop.h" |
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/* |
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* Compute which tile an (x,y,z,s) value is in. |
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*/ |
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uint32 |
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TIFFComputeTile(TIFF* tif, uint32 x, uint32 y, uint32 z, uint16 s) |
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{ |
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TIFFDirectory *td = &tif->tif_dir; |
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uint32 dx = td->td_tilewidth; |
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uint32 dy = td->td_tilelength; |
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uint32 dz = td->td_tiledepth; |
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uint32 tile = 1; |
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if (td->td_imagedepth == 1) |
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z = 0; |
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if (dx == (uint32) -1) |
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dx = td->td_imagewidth; |
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if (dy == (uint32) -1) |
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dy = td->td_imagelength; |
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if (dz == (uint32) -1) |
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dz = td->td_imagedepth; |
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if (dx != 0 && dy != 0 && dz != 0) { |
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uint32 xpt = TIFFhowmany_32(td->td_imagewidth, dx); |
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uint32 ypt = TIFFhowmany_32(td->td_imagelength, dy); |
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uint32 zpt = TIFFhowmany_32(td->td_imagedepth, dz); |
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if (td->td_planarconfig == PLANARCONFIG_SEPARATE) |
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tile = (xpt*ypt*zpt)*s + |
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(xpt*ypt)*(z/dz) + |
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xpt*(y/dy) + |
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x/dx; |
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else |
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tile = (xpt*ypt)*(z/dz) + xpt*(y/dy) + x/dx; |
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} |
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return (tile); |
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} |
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/* |
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* Check an (x,y,z,s) coordinate |
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* against the image bounds. |
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*/ |
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int |
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TIFFCheckTile(TIFF* tif, uint32 x, uint32 y, uint32 z, uint16 s) |
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{ |
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TIFFDirectory *td = &tif->tif_dir; |
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if (x >= td->td_imagewidth) { |
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
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"%lu: Col out of range, max %lu", |
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(unsigned long) x, |
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(unsigned long) (td->td_imagewidth - 1)); |
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return (0); |
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} |
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if (y >= td->td_imagelength) { |
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
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"%lu: Row out of range, max %lu", |
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(unsigned long) y, |
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(unsigned long) (td->td_imagelength - 1)); |
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return (0); |
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} |
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if (z >= td->td_imagedepth) { |
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
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"%lu: Depth out of range, max %lu", |
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(unsigned long) z, |
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(unsigned long) (td->td_imagedepth - 1)); |
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return (0); |
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} |
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if (td->td_planarconfig == PLANARCONFIG_SEPARATE && |
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s >= td->td_samplesperpixel) { |
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
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"%lu: Sample out of range, max %lu", |
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(unsigned long) s, |
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(unsigned long) (td->td_samplesperpixel - 1)); |
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return (0); |
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} |
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return (1); |
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} |
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/* |
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* Compute how many tiles are in an image. |
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*/ |
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uint32 |
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TIFFNumberOfTiles(TIFF* tif) |
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{ |
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TIFFDirectory *td = &tif->tif_dir; |
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uint32 dx = td->td_tilewidth; |
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uint32 dy = td->td_tilelength; |
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uint32 dz = td->td_tiledepth; |
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uint32 ntiles; |
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if (dx == (uint32) -1) |
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dx = td->td_imagewidth; |
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if (dy == (uint32) -1) |
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dy = td->td_imagelength; |
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if (dz == (uint32) -1) |
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dz = td->td_imagedepth; |
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ntiles = (dx == 0 || dy == 0 || dz == 0) ? 0 : |
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_TIFFMultiply32(tif, _TIFFMultiply32(tif, TIFFhowmany_32(td->td_imagewidth, dx), |
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TIFFhowmany_32(td->td_imagelength, dy), |
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"TIFFNumberOfTiles"), |
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TIFFhowmany_32(td->td_imagedepth, dz), "TIFFNumberOfTiles"); |
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if (td->td_planarconfig == PLANARCONFIG_SEPARATE) |
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ntiles = _TIFFMultiply32(tif, ntiles, td->td_samplesperpixel, |
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"TIFFNumberOfTiles"); |
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return (ntiles); |
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} |
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/* |
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* Compute the # bytes in each row of a tile. |
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*/ |
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uint64 |
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TIFFTileRowSize64(TIFF* tif) |
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{ |
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TIFFDirectory *td = &tif->tif_dir; |
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uint64 rowsize; |
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if (td->td_tilelength == 0 || td->td_tilewidth == 0) |
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return (0); |
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rowsize = _TIFFMultiply64(tif, td->td_bitspersample, td->td_tilewidth, |
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"TIFFTileRowSize"); |
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if (td->td_planarconfig == PLANARCONFIG_CONTIG) |
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rowsize = _TIFFMultiply64(tif, rowsize, td->td_samplesperpixel, |
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"TIFFTileRowSize"); |
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return (TIFFhowmany8_64(rowsize)); |
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} |
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tmsize_t |
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TIFFTileRowSize(TIFF* tif) |
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{ |
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static const char module[] = "TIFFTileRowSize"; |
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uint64 m; |
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tmsize_t n; |
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m=TIFFTileRowSize64(tif); |
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n=(tmsize_t)m; |
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if ((uint64)n!=m) |
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{ |
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TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); |
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n=0; |
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} |
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return(n); |
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} |
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/* |
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* Compute the # bytes in a variable length, row-aligned tile. |
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*/ |
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uint64 |
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TIFFVTileSize64(TIFF* tif, uint32 nrows) |
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{ |
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static const char module[] = "TIFFVTileSize64"; |
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TIFFDirectory *td = &tif->tif_dir; |
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if (td->td_tilelength == 0 || td->td_tilewidth == 0 || |
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td->td_tiledepth == 0) |
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return (0); |
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if ((td->td_planarconfig==PLANARCONFIG_CONTIG)&& |
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(td->td_photometric==PHOTOMETRIC_YCBCR)&& |
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(td->td_samplesperpixel==3)&& |
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(!isUpSampled(tif))) |
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{ |
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/* |
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* Packed YCbCr data contain one Cb+Cr for every |
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* HorizontalSampling*VerticalSampling Y values. |
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* Must also roundup width and height when calculating |
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* since images that are not a multiple of the |
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* horizontal/vertical subsampling area include |
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* YCbCr data for the extended image. |
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*/ |
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uint16 ycbcrsubsampling[2]; |
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uint16 samplingblock_samples; |
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uint32 samplingblocks_hor; |
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uint32 samplingblocks_ver; |
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uint64 samplingrow_samples; |
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uint64 samplingrow_size; |
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TIFFGetFieldDefaulted(tif,TIFFTAG_YCBCRSUBSAMPLING,ycbcrsubsampling+0, |
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ycbcrsubsampling+1); |
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assert((ycbcrsubsampling[0]==1)||(ycbcrsubsampling[0]==2)||(ycbcrsubsampling[0]==4)); |
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assert((ycbcrsubsampling[1]==1)||(ycbcrsubsampling[1]==2)||(ycbcrsubsampling[1]==4)); |
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if (ycbcrsubsampling[0]*ycbcrsubsampling[1]==0) |
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{ |
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TIFFErrorExt(tif->tif_clientdata,module, |
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"Invalid YCbCr subsampling"); |
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return 0; |
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} |
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samplingblock_samples=ycbcrsubsampling[0]*ycbcrsubsampling[1]+2; |
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samplingblocks_hor=TIFFhowmany_32(td->td_tilewidth,ycbcrsubsampling[0]); |
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samplingblocks_ver=TIFFhowmany_32(nrows,ycbcrsubsampling[1]); |
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samplingrow_samples=_TIFFMultiply64(tif,samplingblocks_hor,samplingblock_samples,module); |
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samplingrow_size=TIFFhowmany8_64(_TIFFMultiply64(tif,samplingrow_samples,td->td_bitspersample,module)); |
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return(_TIFFMultiply64(tif,samplingrow_size,samplingblocks_ver,module)); |
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} |
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else |
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return(_TIFFMultiply64(tif,nrows,TIFFTileRowSize64(tif),module)); |
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} |
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tmsize_t |
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TIFFVTileSize(TIFF* tif, uint32 nrows) |
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{ |
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static const char module[] = "TIFFVTileSize"; |
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uint64 m; |
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tmsize_t n; |
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m=TIFFVTileSize64(tif,nrows); |
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n=(tmsize_t)m; |
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if ((uint64)n!=m) |
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{ |
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TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); |
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n=0; |
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} |
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return(n); |
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} |
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/* |
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* Compute the # bytes in a row-aligned tile. |
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*/ |
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uint64 |
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TIFFTileSize64(TIFF* tif) |
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{ |
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return (TIFFVTileSize64(tif, tif->tif_dir.td_tilelength)); |
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} |
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tmsize_t |
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TIFFTileSize(TIFF* tif) |
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{ |
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static const char module[] = "TIFFTileSize"; |
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uint64 m; |
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tmsize_t n; |
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m=TIFFTileSize64(tif); |
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n=(tmsize_t)m; |
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if ((uint64)n!=m) |
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{ |
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TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); |
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n=0; |
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} |
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return(n); |
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} |
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/* |
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* Compute a default tile size based on the image |
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* characteristics and a requested value. If a |
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* request is <1 then we choose a size according |
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* to certain heuristics. |
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*/ |
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void |
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TIFFDefaultTileSize(TIFF* tif, uint32* tw, uint32* th) |
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{ |
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(*tif->tif_deftilesize)(tif, tw, th); |
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} |
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void |
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_TIFFDefaultTileSize(TIFF* tif, uint32* tw, uint32* th) |
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{ |
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(void) tif; |
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if (*(int32*) tw < 1) |
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*tw = 256; |
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if (*(int32*) th < 1) |
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*th = 256; |
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/* roundup to a multiple of 16 per the spec */ |
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if (*tw & 0xf) |
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*tw = TIFFroundup_32(*tw, 16); |
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if (*th & 0xf) |
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*th = TIFFroundup_32(*th, 16); |
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} |
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/* vim: set ts=8 sts=8 sw=8 noet: */ |
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/* |
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* Local Variables: |
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* mode: c |
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* c-basic-offset: 8 |
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* fill-column: 78 |
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* End: |
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*/
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