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381 lines
11 KiB
381 lines
11 KiB
/* $Id: tif_strip.c,v 1.34 2011-04-02 20:54:09 bfriesen 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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* Strip-organized Image Support Routines. |
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*/ |
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#include "tiffiop.h" |
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/* |
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* Compute which strip a (row,sample) value is in. |
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*/ |
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uint32 |
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TIFFComputeStrip(TIFF* tif, uint32 row, uint16 sample) |
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{ |
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static const char module[] = "TIFFComputeStrip"; |
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TIFFDirectory *td = &tif->tif_dir; |
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uint32 strip; |
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strip = row / td->td_rowsperstrip; |
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if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { |
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if (sample >= td->td_samplesperpixel) { |
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TIFFErrorExt(tif->tif_clientdata, module, |
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"%lu: Sample out of range, max %lu", |
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(unsigned long) sample, (unsigned long) td->td_samplesperpixel); |
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return (0); |
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} |
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strip += (uint32)sample*td->td_stripsperimage; |
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} |
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return (strip); |
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} |
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/* |
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* Compute how many strips are in an image. |
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*/ |
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uint32 |
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TIFFNumberOfStrips(TIFF* tif) |
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{ |
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TIFFDirectory *td = &tif->tif_dir; |
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uint32 nstrips; |
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nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 : |
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TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip)); |
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if (td->td_planarconfig == PLANARCONFIG_SEPARATE) |
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nstrips = _TIFFMultiply32(tif, nstrips, (uint32)td->td_samplesperpixel, |
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"TIFFNumberOfStrips"); |
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return (nstrips); |
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} |
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/* |
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* Compute the # bytes in a variable height, row-aligned strip. |
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*/ |
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uint64 |
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TIFFVStripSize64(TIFF* tif, uint32 nrows) |
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{ |
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static const char module[] = "TIFFVStripSize64"; |
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TIFFDirectory *td = &tif->tif_dir; |
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if (nrows==(uint32)(-1)) |
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nrows=td->td_imagelength; |
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if ((td->td_planarconfig==PLANARCONFIG_CONTIG)&& |
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(td->td_photometric == PHOTOMETRIC_YCBCR)&& |
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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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if(td->td_samplesperpixel!=3) |
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{ |
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TIFFErrorExt(tif->tif_clientdata,module, |
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"Invalid td_samplesperpixel value"); |
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return 0; |
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} |
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TIFFGetFieldDefaulted(tif,TIFFTAG_YCBCRSUBSAMPLING,ycbcrsubsampling+0, |
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ycbcrsubsampling+1); |
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if (((ycbcrsubsampling[0]!=1)&&(ycbcrsubsampling[0]!=2)&&(ycbcrsubsampling[0]!=4)) || |
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((ycbcrsubsampling[1]!=1)&&(ycbcrsubsampling[1]!=2)&&(ycbcrsubsampling[1]!=4))) |
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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_imagewidth,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,TIFFScanlineSize64(tif),module)); |
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} |
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tmsize_t |
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TIFFVStripSize(TIFF* tif, uint32 nrows) |
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{ |
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static const char module[] = "TIFFVStripSize"; |
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uint64 m; |
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tmsize_t n; |
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m=TIFFVStripSize64(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 raw strip. |
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*/ |
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uint64 |
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TIFFRawStripSize64(TIFF* tif, uint32 strip) |
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{ |
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static const char module[] = "TIFFRawStripSize64"; |
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TIFFDirectory* td = &tif->tif_dir; |
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uint64 bytecount = td->td_stripbytecount[strip]; |
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if (bytecount == 0) |
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{ |
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#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) |
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TIFFErrorExt(tif->tif_clientdata, module, |
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"%I64u: Invalid strip byte count, strip %lu", |
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(unsigned __int64) bytecount, |
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(unsigned long) strip); |
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#else |
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TIFFErrorExt(tif->tif_clientdata, module, |
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"%llu: Invalid strip byte count, strip %lu", |
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(unsigned long long) bytecount, |
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(unsigned long) strip); |
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#endif |
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bytecount = (uint64) -1; |
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} |
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return bytecount; |
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} |
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tmsize_t |
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TIFFRawStripSize(TIFF* tif, uint32 strip) |
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{ |
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static const char module[] = "TIFFRawStripSize"; |
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uint64 m; |
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tmsize_t n; |
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m=TIFFRawStripSize64(tif,strip); |
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if (m==(uint64)(-1)) |
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n=(tmsize_t)(-1); |
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else |
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{ |
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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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} |
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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) strip. |
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* |
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* Note that if RowsPerStrip is larger than the |
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* recorded ImageLength, then the strip size is |
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* truncated to reflect the actual space required |
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* to hold the strip. |
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*/ |
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uint64 |
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TIFFStripSize64(TIFF* tif) |
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{ |
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TIFFDirectory* td = &tif->tif_dir; |
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uint32 rps = td->td_rowsperstrip; |
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if (rps > td->td_imagelength) |
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rps = td->td_imagelength; |
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return (TIFFVStripSize64(tif, rps)); |
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} |
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tmsize_t |
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TIFFStripSize(TIFF* tif) |
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{ |
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static const char module[] = "TIFFStripSize"; |
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uint64 m; |
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tmsize_t n; |
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m=TIFFStripSize64(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 strip size based on the image |
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* characteristics and a requested value. If the |
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* request is <1 then we choose a strip size according |
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* to certain heuristics. |
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*/ |
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uint32 |
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TIFFDefaultStripSize(TIFF* tif, uint32 request) |
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{ |
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return (*tif->tif_defstripsize)(tif, request); |
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} |
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uint32 |
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_TIFFDefaultStripSize(TIFF* tif, uint32 s) |
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{ |
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if ((int32) s < 1) { |
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/* |
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* If RowsPerStrip is unspecified, try to break the |
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* image up into strips that are approximately |
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* STRIP_SIZE_DEFAULT bytes long. |
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*/ |
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uint64 scanlinesize; |
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uint64 rows; |
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scanlinesize=TIFFScanlineSize64(tif); |
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if (scanlinesize==0) |
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scanlinesize=1; |
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rows=(uint64)STRIP_SIZE_DEFAULT/scanlinesize; |
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if (rows==0) |
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rows=1; |
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else if (rows>0xFFFFFFFF) |
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rows=0xFFFFFFFF; |
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s=(uint32)rows; |
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} |
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return (s); |
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} |
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/* |
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* Return the number of bytes to read/write in a call to |
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* one of the scanline-oriented i/o routines. Note that |
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* this number may be 1/samples-per-pixel if data is |
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* stored as separate planes. |
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* The ScanlineSize in case of YCbCrSubsampling is defined as the |
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* strip size divided by the strip height, i.e. the size of a pack of vertical |
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* subsampling lines divided by vertical subsampling. It should thus make |
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* sense when multiplied by a multiple of vertical subsampling. |
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*/ |
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uint64 |
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TIFFScanlineSize64(TIFF* tif) |
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{ |
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static const char module[] = "TIFFScanlineSize64"; |
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TIFFDirectory *td = &tif->tif_dir; |
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uint64 scanline_size; |
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if (td->td_planarconfig==PLANARCONFIG_CONTIG) |
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{ |
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if ((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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uint16 ycbcrsubsampling[2]; |
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uint16 samplingblock_samples; |
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uint32 samplingblocks_hor; |
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uint64 samplingrow_samples; |
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uint64 samplingrow_size; |
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if(td->td_samplesperpixel!=3) |
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{ |
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TIFFErrorExt(tif->tif_clientdata,module, |
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"Invalid td_samplesperpixel value"); |
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return 0; |
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} |
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TIFFGetFieldDefaulted(tif,TIFFTAG_YCBCRSUBSAMPLING, |
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ycbcrsubsampling+0, |
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ycbcrsubsampling+1); |
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if (((ycbcrsubsampling[0]!=1)&&(ycbcrsubsampling[0]!=2)&&(ycbcrsubsampling[0]!=4)) || |
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((ycbcrsubsampling[1]!=1)&&(ycbcrsubsampling[1]!=2)&&(ycbcrsubsampling[1]!=4))) |
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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_imagewidth,ycbcrsubsampling[0]); |
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samplingrow_samples = _TIFFMultiply64(tif,samplingblocks_hor,samplingblock_samples,module); |
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samplingrow_size = TIFFhowmany_64(_TIFFMultiply64(tif,samplingrow_samples,td->td_bitspersample,module),8); |
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scanline_size = (samplingrow_size/ycbcrsubsampling[1]); |
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} |
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else |
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{ |
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uint64 scanline_samples; |
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scanline_samples=_TIFFMultiply64(tif,td->td_imagewidth,td->td_samplesperpixel,module); |
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scanline_size=TIFFhowmany_64(_TIFFMultiply64(tif,scanline_samples,td->td_bitspersample,module),8); |
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} |
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} |
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else |
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scanline_size=TIFFhowmany_64(_TIFFMultiply64(tif,td->td_imagewidth,td->td_bitspersample,module),8); |
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return(scanline_size); |
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} |
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tmsize_t |
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TIFFScanlineSize(TIFF* tif) |
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{ |
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static const char module[] = "TIFFScanlineSize"; |
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uint64 m; |
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tmsize_t n; |
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m=TIFFScanlineSize64(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 arithmetic 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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* Return the number of bytes required to store a complete |
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* decoded and packed raster scanline (as opposed to the |
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* I/O size returned by TIFFScanlineSize which may be less |
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* if data is store as separate planes). |
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*/ |
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uint64 |
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TIFFRasterScanlineSize64(TIFF* tif) |
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{ |
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static const char module[] = "TIFFRasterScanlineSize64"; |
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TIFFDirectory *td = &tif->tif_dir; |
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uint64 scanline; |
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scanline = _TIFFMultiply64(tif, td->td_bitspersample, td->td_imagewidth, module); |
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if (td->td_planarconfig == PLANARCONFIG_CONTIG) { |
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scanline = _TIFFMultiply64(tif, scanline, td->td_samplesperpixel, module); |
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return (TIFFhowmany8_64(scanline)); |
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} else |
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return (_TIFFMultiply64(tif, TIFFhowmany8_64(scanline), |
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td->td_samplesperpixel, module)); |
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} |
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tmsize_t |
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TIFFRasterScanlineSize(TIFF* tif) |
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{ |
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static const char module[] = "TIFFRasterScanlineSize"; |
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uint64 m; |
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tmsize_t n; |
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m=TIFFRasterScanlineSize64(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 arithmetic 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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/* 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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