| /* $Id: tif_tile.c,v 1.24 2015-06-07 22:35:40 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" |
| |
| /* |
| * 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) |
| { |
| static const char module[] = "TIFFTileRowSize64"; |
| TIFFDirectory *td = &tif->tif_dir; |
| uint64 rowsize; |
| uint64 tilerowsize; |
| |
| if (td->td_tilelength == 0) |
| { |
| TIFFErrorExt(tif->tif_clientdata,module,"Tile length is zero"); |
| return 0; |
| } |
| if (td->td_tilewidth == 0) |
| { |
| TIFFErrorExt(tif->tif_clientdata,module,"Tile width is zero"); |
| return (0); |
| } |
| rowsize = _TIFFMultiply64(tif, td->td_bitspersample, td->td_tilewidth, |
| "TIFFTileRowSize"); |
| if (td->td_planarconfig == PLANARCONFIG_CONTIG) |
| { |
| if (td->td_samplesperpixel == 0) |
| { |
| TIFFErrorExt(tif->tif_clientdata,module,"Samples per pixel is zero"); |
| return 0; |
| } |
| rowsize = _TIFFMultiply64(tif, rowsize, td->td_samplesperpixel, |
| "TIFFTileRowSize"); |
| } |
| tilerowsize=TIFFhowmany8_64(rowsize); |
| if (tilerowsize == 0) |
| { |
| TIFFErrorExt(tif->tif_clientdata,module,"Computed tile row size is zero"); |
| return 0; |
| } |
| return (tilerowsize); |
| } |
| 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: |
| */ |