| /* |
| * 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. |
| * |
| * Strip-organized Image Support Routines. |
| */ |
| #include "tiffiop.h" |
| |
| /* |
| * Compute which strip a (row,sample) value is in. |
| */ |
| uint32 |
| TIFFComputeStrip(TIFF* tif, uint32 row, uint16 sample) |
| { |
| static const char module[] = "TIFFComputeStrip"; |
| TIFFDirectory *td = &tif->tif_dir; |
| uint32 strip; |
| |
| strip = row / td->td_rowsperstrip; |
| if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { |
| if (sample >= td->td_samplesperpixel) { |
| TIFFErrorExt(tif->tif_clientdata, module, |
| "%lu: Sample out of range, max %lu", |
| (unsigned long) sample, (unsigned long) td->td_samplesperpixel); |
| return (0); |
| } |
| strip += (uint32)sample*td->td_stripsperimage; |
| } |
| return (strip); |
| } |
| |
| /* |
| * Compute how many strips are in an image. |
| */ |
| uint32 |
| TIFFNumberOfStrips(TIFF* tif) |
| { |
| TIFFDirectory *td = &tif->tif_dir; |
| uint32 nstrips; |
| |
| nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 : |
| TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip)); |
| if (td->td_planarconfig == PLANARCONFIG_SEPARATE) |
| nstrips = _TIFFMultiply32(tif, nstrips, (uint32)td->td_samplesperpixel, |
| "TIFFNumberOfStrips"); |
| return (nstrips); |
| } |
| |
| /* |
| * Compute the # bytes in a variable height, row-aligned strip. |
| */ |
| uint64 |
| TIFFVStripSize64(TIFF* tif, uint32 nrows) |
| { |
| static const char module[] = "TIFFVStripSize64"; |
| TIFFDirectory *td = &tif->tif_dir; |
| if (nrows==(uint32)(-1)) |
| nrows=td->td_imagelength; |
| 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. |
| */ |
| uint16 ycbcrsubsampling[2]; |
| uint16 samplingblock_samples; |
| uint32 samplingblocks_hor; |
| uint32 samplingblocks_ver; |
| uint64 samplingrow_samples; |
| uint64 samplingrow_size; |
| if(td->td_samplesperpixel!=3) |
| { |
| TIFFErrorExt(tif->tif_clientdata,module, |
| "Invalid td_samplesperpixel value"); |
| return 0; |
| } |
| 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_imagewidth,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,TIFFScanlineSize64(tif),module)); |
| } |
| tmsize_t |
| TIFFVStripSize(TIFF* tif, uint32 nrows) |
| { |
| static const char module[] = "TIFFVStripSize"; |
| uint64 m; |
| m=TIFFVStripSize64(tif,nrows); |
| return _TIFFCastUInt64ToSSize(tif, m, module); |
| } |
| |
| /* |
| * Compute the # bytes in a raw strip. |
| */ |
| uint64 |
| TIFFRawStripSize64(TIFF* tif, uint32 strip) |
| { |
| static const char module[] = "TIFFRawStripSize64"; |
| uint64 bytecount = TIFFGetStrileByteCount(tif, strip); |
| |
| if (bytecount == 0) |
| { |
| #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) |
| TIFFErrorExt(tif->tif_clientdata, module, |
| "%I64u: Invalid strip byte count, strip %lu", |
| (unsigned __int64) bytecount, |
| (unsigned long) strip); |
| #else |
| TIFFErrorExt(tif->tif_clientdata, module, |
| "%llu: Invalid strip byte count, strip %lu", |
| (unsigned long long) bytecount, |
| (unsigned long) strip); |
| #endif |
| bytecount = (uint64) -1; |
| } |
| |
| return bytecount; |
| } |
| tmsize_t |
| TIFFRawStripSize(TIFF* tif, uint32 strip) |
| { |
| static const char module[] = "TIFFRawStripSize"; |
| uint64 m; |
| tmsize_t n; |
| m=TIFFRawStripSize64(tif,strip); |
| if (m==(uint64)(-1)) |
| n=(tmsize_t)(-1); |
| else |
| { |
| 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) strip. |
| * |
| * Note that if RowsPerStrip is larger than the |
| * recorded ImageLength, then the strip size is |
| * truncated to reflect the actual space required |
| * to hold the strip. |
| */ |
| uint64 |
| TIFFStripSize64(TIFF* tif) |
| { |
| TIFFDirectory* td = &tif->tif_dir; |
| uint32 rps = td->td_rowsperstrip; |
| if (rps > td->td_imagelength) |
| rps = td->td_imagelength; |
| return (TIFFVStripSize64(tif, rps)); |
| } |
| tmsize_t |
| TIFFStripSize(TIFF* tif) |
| { |
| static const char module[] = "TIFFStripSize"; |
| uint64 m; |
| m=TIFFStripSize64(tif); |
| return _TIFFCastUInt64ToSSize(tif, m, module); |
| } |
| |
| /* |
| * Compute a default strip size based on the image |
| * characteristics and a requested value. If the |
| * request is <1 then we choose a strip size according |
| * to certain heuristics. |
| */ |
| uint32 |
| TIFFDefaultStripSize(TIFF* tif, uint32 request) |
| { |
| return (*tif->tif_defstripsize)(tif, request); |
| } |
| |
| uint32 |
| _TIFFDefaultStripSize(TIFF* tif, uint32 s) |
| { |
| if ((int32) s < 1) { |
| /* |
| * If RowsPerStrip is unspecified, try to break the |
| * image up into strips that are approximately |
| * STRIP_SIZE_DEFAULT bytes long. |
| */ |
| uint64 scanlinesize; |
| uint64 rows; |
| scanlinesize=TIFFScanlineSize64(tif); |
| if (scanlinesize==0) |
| scanlinesize=1; |
| rows=(uint64)STRIP_SIZE_DEFAULT/scanlinesize; |
| if (rows==0) |
| rows=1; |
| else if (rows>0xFFFFFFFF) |
| rows=0xFFFFFFFF; |
| s=(uint32)rows; |
| } |
| return (s); |
| } |
| |
| /* |
| * Return the number of bytes to read/write in a call to |
| * one of the scanline-oriented i/o routines. Note that |
| * this number may be 1/samples-per-pixel if data is |
| * stored as separate planes. |
| * The ScanlineSize in case of YCbCrSubsampling is defined as the |
| * strip size divided by the strip height, i.e. the size of a pack of vertical |
| * subsampling lines divided by vertical subsampling. It should thus make |
| * sense when multiplied by a multiple of vertical subsampling. |
| */ |
| uint64 |
| TIFFScanlineSize64(TIFF* tif) |
| { |
| static const char module[] = "TIFFScanlineSize64"; |
| TIFFDirectory *td = &tif->tif_dir; |
| uint64 scanline_size; |
| if (td->td_planarconfig==PLANARCONFIG_CONTIG) |
| { |
| if ((td->td_photometric==PHOTOMETRIC_YCBCR)&& |
| (td->td_samplesperpixel==3)&& |
| (!isUpSampled(tif))) |
| { |
| uint16 ycbcrsubsampling[2]; |
| uint16 samplingblock_samples; |
| uint32 samplingblocks_hor; |
| uint64 samplingrow_samples; |
| uint64 samplingrow_size; |
| if(td->td_samplesperpixel!=3) |
| { |
| TIFFErrorExt(tif->tif_clientdata,module, |
| "Invalid td_samplesperpixel value"); |
| return 0; |
| } |
| 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"); |
| return 0; |
| } |
| samplingblock_samples = ycbcrsubsampling[0]*ycbcrsubsampling[1]+2; |
| samplingblocks_hor = TIFFhowmany_32(td->td_imagewidth,ycbcrsubsampling[0]); |
| samplingrow_samples = _TIFFMultiply64(tif,samplingblocks_hor,samplingblock_samples,module); |
| samplingrow_size = TIFFhowmany_64(_TIFFMultiply64(tif,samplingrow_samples,td->td_bitspersample,module),8); |
| scanline_size = (samplingrow_size/ycbcrsubsampling[1]); |
| } |
| else |
| { |
| uint64 scanline_samples; |
| scanline_samples=_TIFFMultiply64(tif,td->td_imagewidth,td->td_samplesperpixel,module); |
| scanline_size=TIFFhowmany_64(_TIFFMultiply64(tif,scanline_samples,td->td_bitspersample,module),8); |
| } |
| } |
| else |
| { |
| scanline_size=TIFFhowmany_64(_TIFFMultiply64(tif,td->td_imagewidth,td->td_bitspersample,module),8); |
| } |
| if (scanline_size == 0) |
| { |
| TIFFErrorExt(tif->tif_clientdata,module,"Computed scanline size is zero"); |
| return 0; |
| } |
| return(scanline_size); |
| } |
| tmsize_t |
| TIFFScanlineSize(TIFF* tif) |
| { |
| static const char module[] = "TIFFScanlineSize"; |
| uint64 m; |
| m=TIFFScanlineSize64(tif); |
| return _TIFFCastUInt64ToSSize(tif, m, module); |
| } |
| |
| /* |
| * Return the number of bytes required to store a complete |
| * decoded and packed raster scanline (as opposed to the |
| * I/O size returned by TIFFScanlineSize which may be less |
| * if data is store as separate planes). |
| */ |
| uint64 |
| TIFFRasterScanlineSize64(TIFF* tif) |
| { |
| static const char module[] = "TIFFRasterScanlineSize64"; |
| TIFFDirectory *td = &tif->tif_dir; |
| uint64 scanline; |
| |
| scanline = _TIFFMultiply64(tif, td->td_bitspersample, td->td_imagewidth, module); |
| if (td->td_planarconfig == PLANARCONFIG_CONTIG) { |
| scanline = _TIFFMultiply64(tif, scanline, td->td_samplesperpixel, module); |
| return (TIFFhowmany8_64(scanline)); |
| } else |
| return (_TIFFMultiply64(tif, TIFFhowmany8_64(scanline), |
| td->td_samplesperpixel, module)); |
| } |
| tmsize_t |
| TIFFRasterScanlineSize(TIFF* tif) |
| { |
| static const char module[] = "TIFFRasterScanlineSize"; |
| uint64 m; |
| m=TIFFRasterScanlineSize64(tif); |
| return _TIFFCastUInt64ToSSize(tif, m, module); |
| } |
| |
| /* vim: set ts=8 sts=8 sw=8 noet: */ |
| /* |
| * Local Variables: |
| * mode: c |
| * c-basic-offset: 8 |
| * fill-column: 78 |
| * End: |
| */ |