C++ TIFFhowmany_32函数代码示例

/*
 * 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));
}

/*
 * 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);
/* IMLIB			scanline_size = (samplingrow_size/ycbcrsubsampling[1]);   See tif_jpeg.c */
			scanline_size = samplingrow_size;
		}
		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);
}

/*
 * Set state to appear as if a
 * tile has just been read in.
 */
static int
TIFFStartTile(TIFF* tif, uint32 tile)
{
        static const char module[] = "TIFFStartTile";
	TIFFDirectory *td = &tif->tif_dir;
        uint32 howmany32;

        if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
                return 0;

	if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
		if (!(*tif->tif_setupdecode)(tif))
			return (0);
		tif->tif_flags |= TIFF_CODERSETUP;
	}
	tif->tif_curtile = tile;
        howmany32=TIFFhowmany_32(td->td_imagewidth, td->td_tilewidth);
        if (howmany32 == 0) {
                 TIFFErrorExt(tif->tif_clientdata,module,"Zero tiles");
                return 0;
        }
	tif->tif_row = (tile % howmany32) * td->td_tilelength;
        howmany32=TIFFhowmany_32(td->td_imagelength, td->td_tilelength);
        if (howmany32 == 0) {
                TIFFErrorExt(tif->tif_clientdata,module,"Zero tiles");
                return 0;
        }
	tif->tif_col = (tile % howmany32) * td->td_tilewidth;
        tif->tif_flags &= ~TIFF_BUF4WRITE;
	if (tif->tif_flags&TIFF_NOREADRAW)
	{
		tif->tif_rawcp = NULL;
		tif->tif_rawcc = 0;
	}
	else
	{
		tif->tif_rawcp = tif->tif_rawdata;
		if( tif->tif_rawdataloaded > 0 )
			tif->tif_rawcc = tif->tif_rawdataloaded;
		else
			tif->tif_rawcc = (tmsize_t)td->td_stripbytecount[tile];
	}
	return ((*tif->tif_predecode)(tif,
			(uint16)(tile/td->td_stripsperimage)));
}

/*
 * 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);
}

/*
 * Write the supplied data to the specified strip.
 *
 * NB: Image length must be setup before writing.
 */
tmsize_t
TIFFWriteRawStrip(TIFF* tif, uint32 strip, void* data, tmsize_t cc)
{
	static const char module[] = "TIFFWriteRawStrip";
	TIFFDirectory *td = &tif->tif_dir;

	if (!WRITECHECKSTRIPS(tif, module))
		return ((tmsize_t) -1);
	/*
	 * Check strip array to make sure there's space.
	 * We don't support dynamically growing files that
	 * have data organized in separate bitplanes because
	 * it's too painful.  In that case we require that
	 * the imagelength be set properly before the first
	 * write (so that the strips array will be fully
	 * allocated above).
	 */
	if (strip >= td->td_nstrips) {
		if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
			TIFFErrorExt(tif->tif_clientdata, module,
			    "Can not grow image by strips when using separate planes");
			return ((tmsize_t) -1);
		}
		/*
		 * Watch out for a growing image.  The value of
		 * strips/image will initially be 1 (since it
		 * can't be deduced until the imagelength is known).
		 */
		if (strip >= td->td_stripsperimage)
			td->td_stripsperimage =
			    TIFFhowmany_32(td->td_imagelength,td->td_rowsperstrip);
		if (!TIFFGrowStrips(tif, 1, module))
			return ((tmsize_t) -1);
	}
	tif->tif_curstrip = strip;
        if (td->td_stripsperimage == 0) {
                TIFFErrorExt(tif->tif_clientdata, module,"Zero strips per image");
                return ((tmsize_t) -1);
        }
	tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
	return (TIFFAppendToStrip(tif, strip, (uint8*) data, cc) ?
	    cc : (tmsize_t) -1);
}

/*
 * Compute how many strips are in an image.
 */
uint32
TIFFNumberOfStrips(TIFF* tif)
{
	TIFFDirectory *td = &tif->tif_dir;
	uint32 nstrips;

    /* If the value was already computed and store in td_nstrips, then return it,
       since ChopUpSingleUncompressedStrip might have altered and resized the
       since the td_stripbytecount and td_stripoffset arrays to the new value
       after the initial affectation of td_nstrips = TIFFNumberOfStrips() in
       tif_dirread.c ~line 3612.
       See http://bugzilla.maptools.org/show_bug.cgi?id=2587 */
    if( td->td_nstrips )
        return td->td_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);
}

int
TIFFWriteScanline(TIFF* tif, void* buf, uint32 row, uint16 sample)
{
	static const char module[] = "TIFFWriteScanline";
	register TIFFDirectory *td;
	int status, imagegrew = 0;
	uint32 strip;

	if (!WRITECHECKSTRIPS(tif, module))
		return (-1);
	/*
	 * Handle delayed allocation of data buffer.  This
	 * permits it to be sized more intelligently (using
	 * directory information).
	 */
	if (!BUFFERCHECK(tif))
		return (-1);
        tif->tif_flags |= TIFF_BUF4WRITE; /* not strictly sure this is right*/

	td = &tif->tif_dir;
	/*
	 * Extend image length if needed
	 * (but only for PlanarConfig=1).
	 */
	if (row >= td->td_imagelength) {	/* extend image */
		if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
			TIFFErrorExt(tif->tif_clientdata, module,
			    "Can not change \"ImageLength\" when using separate planes");
			return (-1);
		}
		td->td_imagelength = row+1;
		imagegrew = 1;
	}
	/*
	 * Calculate strip and check for crossings.
	 */
	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 (-1);
		}
		strip = sample*td->td_stripsperimage + row/td->td_rowsperstrip;
	} else
		strip = row / td->td_rowsperstrip;
	/*
	 * Check strip array to make sure there's space. We don't support
	 * dynamically growing files that have data organized in separate
	 * bitplanes because it's too painful.  In that case we require that
	 * the imagelength be set properly before the first write (so that the
	 * strips array will be fully allocated above).
	 */
	if (strip >= td->td_nstrips && !TIFFGrowStrips(tif, 1, module))
		return (-1);
	if (strip != tif->tif_curstrip) {
		/*
		 * Changing strips -- flush any data present.
		 */
		if (!TIFFFlushData(tif))
			return (-1);
		tif->tif_curstrip = strip;
		/*
		 * Watch out for a growing image.  The value of strips/image
		 * will initially be 1 (since it can't be deduced until the
		 * imagelength is known).
		 */
		if (strip >= td->td_stripsperimage && imagegrew)
			td->td_stripsperimage =
			    TIFFhowmany_32(td->td_imagelength,td->td_rowsperstrip);
                if (td->td_stripsperimage == 0) {
                        TIFFErrorExt(tif->tif_clientdata, module, "Zero strips per image");
                        return (-1);
                }
		tif->tif_row =
		    (strip % td->td_stripsperimage) * td->td_rowsperstrip;
		if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
			if (!(*tif->tif_setupencode)(tif))
				return (-1);
			tif->tif_flags |= TIFF_CODERSETUP;
		}
        
		tif->tif_rawcc = 0;
		tif->tif_rawcp = tif->tif_rawdata;

		if( td->td_stripbytecount[strip] > 0 )
		{
			/* if we are writing over existing tiles, zero length */
			td->td_stripbytecount[strip] = 0;

			/* this forces TIFFAppendToStrip() to do a seek */
			tif->tif_curoff = 0;
		}

		if (!(*tif->tif_preencode)(tif, sample))
			return (-1);
		tif->tif_flags |= TIFF_POSTENCODE;
	}
	/*
	 * Ensure the write is either sequential or at the
//.........这里部分代码省略.........

/*
 * Encode the supplied data and write it to the
 * specified tile.  There must be space for the
 * data.  The function clamps individual writes
 * to a tile to the tile size, but does not (and
 * can not) check that multiple writes to the same
 * tile do not write more than tile size data.
 *
 * NB: Image length must be setup before writing; this
 *     interface does not support automatically growing
 *     the image on each write (as TIFFWriteScanline does).
 */
tmsize_t
TIFFWriteEncodedTile(TIFF* tif, uint32 tile, void* data, tmsize_t cc)
{
	static const char module[] = "TIFFWriteEncodedTile";
	TIFFDirectory *td;
	uint16 sample;
        uint32 howmany32;

	if (!WRITECHECKTILES(tif, module))
		return ((tmsize_t)(-1));
	td = &tif->tif_dir;
	if (tile >= td->td_nstrips) {
		TIFFErrorExt(tif->tif_clientdata, module, "Tile %lu out of range, max %lu",
		    (unsigned long) tile, (unsigned long) td->td_nstrips);
		return ((tmsize_t)(-1));
	}
	/*
	 * Handle delayed allocation of data buffer.  This
	 * permits it to be sized more intelligently (using
	 * directory information).
	 */
	if (!BUFFERCHECK(tif))
		return ((tmsize_t)(-1));

        tif->tif_flags |= TIFF_BUF4WRITE;
	tif->tif_curtile = tile;

	if( td->td_stripbytecount[tile] > 0 )
        {
            /* Make sure that at the first attempt of rewriting the tile, we will have */
            /* more bytes available in the output buffer than the previous byte count, */
            /* so that TIFFAppendToStrip() will detect the overflow when it is called the first */
            /* time if the new compressed tile is bigger than the older one. (GDAL #4771) */
            if( tif->tif_rawdatasize <= (tmsize_t) td->td_stripbytecount[tile] )
            {
                if( !(TIFFWriteBufferSetup(tif, NULL,
                    (tmsize_t)TIFFroundup_64((uint64)(td->td_stripbytecount[tile] + 1), 1024))) )
                    return ((tmsize_t)(-1));
            }

	    /* Force TIFFAppendToStrip() to consider placing data at end
               of file. */
            tif->tif_curoff = 0;
        }

	tif->tif_rawcc = 0;
	tif->tif_rawcp = tif->tif_rawdata;

	/* 
	 * Compute tiles per row & per column to compute
	 * current row and column
	 */
        howmany32=TIFFhowmany_32(td->td_imagelength, td->td_tilelength);
        if (howmany32 == 0) {
                 TIFFErrorExt(tif->tif_clientdata,module,"Zero tiles");
                return ((tmsize_t)(-1));
        }
	tif->tif_row = (tile % howmany32) * td->td_tilelength;
        howmany32=TIFFhowmany_32(td->td_imagewidth, td->td_tilewidth);
        if (howmany32 == 0) {
                 TIFFErrorExt(tif->tif_clientdata,module,"Zero tiles");
                return ((tmsize_t)(-1));
        }
	tif->tif_col = (tile % howmany32) * td->td_tilewidth;

	if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
		if (!(*tif->tif_setupencode)(tif))
			return ((tmsize_t)(-1));
		tif->tif_flags |= TIFF_CODERSETUP;
	}
	tif->tif_flags &= ~TIFF_POSTENCODE;

	/*
	 * Clamp write amount to the tile size.  This is mostly
	 * done so that callers can pass in some large number
	 * (e.g. -1) and have the tile size used instead.
	 */
	if ( cc < 1 || cc > tif->tif_tilesize)
		cc = tif->tif_tilesize;

    /* shortcut to avoid an extra memcpy() */
    if( td->td_compression == COMPRESSION_NONE )
    {
        /* swab if needed - note that source buffer will be altered */
        tif->tif_postdecode( tif, (uint8*) data, cc );

        if (!isFillOrder(tif, td->td_fillorder) &&
            (tif->tif_flags & TIFF_NOBITREV) == 0)
//.........这里部分代码省略.........

/*
 * Encode the supplied data and write it to the
 * specified strip.
 *
 * NB: Image length must be setup before writing.
 */
tmsize_t
TIFFWriteEncodedStrip(TIFF* tif, uint32 strip, void* data, tmsize_t cc)
{
	static const char module[] = "TIFFWriteEncodedStrip";
	TIFFDirectory *td = &tif->tif_dir;
	uint16 sample;

	if (!WRITECHECKSTRIPS(tif, module))
		return ((tmsize_t) -1);
	/*
	 * Check strip array to make sure there's space.
	 * We don't support dynamically growing files that
	 * have data organized in separate bitplanes because
	 * it's too painful.  In that case we require that
	 * the imagelength be set properly before the first
	 * write (so that the strips array will be fully
	 * allocated above).
	 */
	if (strip >= td->td_nstrips) {
		if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
			TIFFErrorExt(tif->tif_clientdata, module,
			    "Can not grow image by strips when using separate planes");
			return ((tmsize_t) -1);
		}
		if (!TIFFGrowStrips(tif, 1, module))
			return ((tmsize_t) -1);
		td->td_stripsperimage =
		    TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip);  
	}
	/*
	 * Handle delayed allocation of data buffer.  This
	 * permits it to be sized according to the directory
	 * info.
	 */
	if (!BUFFERCHECK(tif))
		return ((tmsize_t) -1);

        tif->tif_flags |= TIFF_BUF4WRITE;
	tif->tif_curstrip = strip;

        if (td->td_stripsperimage == 0) {
                TIFFErrorExt(tif->tif_clientdata, module, "Zero strips per image");
                return ((tmsize_t) -1);
        }

	tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
	if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
		if (!(*tif->tif_setupencode)(tif))
			return ((tmsize_t) -1);
		tif->tif_flags |= TIFF_CODERSETUP;
	}

	if( td->td_stripbytecount[strip] > 0 )
        {
            /* Make sure that at the first attempt of rewriting the tile, we will have */
            /* more bytes available in the output buffer than the previous byte count, */
            /* so that TIFFAppendToStrip() will detect the overflow when it is called the first */
            /* time if the new compressed tile is bigger than the older one. (GDAL #4771) */
            if( tif->tif_rawdatasize <= (tmsize_t)td->td_stripbytecount[strip] )
            {
                if( !(TIFFWriteBufferSetup(tif, NULL,
                    (tmsize_t)TIFFroundup_64((uint64)(td->td_stripbytecount[strip] + 1), 1024))) )
                    return ((tmsize_t)(-1));
            }

	    /* Force TIFFAppendToStrip() to consider placing data at end
               of file. */
            tif->tif_curoff = 0;
        }

    tif->tif_rawcc = 0;
    tif->tif_rawcp = tif->tif_rawdata;

	tif->tif_flags &= ~TIFF_POSTENCODE;

    /* shortcut to avoid an extra memcpy() */
    if( td->td_compression == COMPRESSION_NONE )
    {
        /* swab if needed - note that source buffer will be altered */
        tif->tif_postdecode( tif, (uint8*) data, cc );

        if (!isFillOrder(tif, td->td_fillorder) &&
            (tif->tif_flags & TIFF_NOBITREV) == 0)
            TIFFReverseBits((uint8*) data, cc);

        if (cc > 0 &&
            !TIFFAppendToStrip(tif, strip, (uint8*) data, cc))
            return ((tmsize_t) -1);
        return (cc);
    }

	sample = (uint16)(strip / td->td_stripsperimage);
	if (!(*tif->tif_preencode)(tif, sample))
		return ((tmsize_t) -1);
//.........这里部分代码省略.........

/*
 * Encode the supplied data and write it to the
 * specified tile.  There must be space for the
 * data.  The function clamps individual writes
 * to a tile to the tile size, but does not (and
 * can not) check that multiple writes to the same
 * tile do not write more than tile size data.
 *
 * NB: Image length must be setup before writing; this
 *     interface does not support automatically growing
 *     the image on each write (as TIFFWriteScanline does).
 */
tmsize_t
TIFFWriteEncodedTile(TIFF* tif, uint32 tile, void* data, tmsize_t cc)
{
	static const char module[] = "TIFFWriteEncodedTile";
	TIFFDirectory *td;
	uint16 sample;

	if (!WRITECHECKTILES(tif, module))
		return ((tmsize_t)(-1));
	td = &tif->tif_dir;
	if (tile >= td->td_nstrips) {
		TIFFErrorExt(tif->tif_clientdata, module, "Tile %lu out of range, max %lu",
		    (unsigned long) tile, (unsigned long) td->td_nstrips);
		return ((tmsize_t)(-1));
	}
	/*
	 * Handle delayed allocation of data buffer.  This
	 * permits it to be sized more intelligently (using
	 * directory information).
	 */
	if (!BUFFERCHECK(tif))
		return ((tmsize_t)(-1));

        tif->tif_flags |= TIFF_BUF4WRITE;
	tif->tif_curtile = tile;

	tif->tif_rawcc = 0;
	tif->tif_rawcp = tif->tif_rawdata;

	if( td->td_stripbytecount[tile] > 0 )
        {
	    /* Force TIFFAppendToStrip() to consider placing data at end
               of file. */
            tif->tif_curoff = 0;
        }
        
	/* 
	 * Compute tiles per row & per column to compute
	 * current row and column
	 */
	tif->tif_row = (tile % TIFFhowmany_32(td->td_imagelength, td->td_tilelength))
		* td->td_tilelength;
	tif->tif_col = (tile % TIFFhowmany_32(td->td_imagewidth, td->td_tilewidth))
		* td->td_tilewidth;

	if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
		if (!(*tif->tif_setupencode)(tif))
			return ((tmsize_t)(-1));
		tif->tif_flags |= TIFF_CODERSETUP;
	}
	tif->tif_flags &= ~TIFF_POSTENCODE;
	sample = (uint16)(tile/td->td_stripsperimage);
	if (!(*tif->tif_preencode)(tif, sample))
		return ((tmsize_t)(-1));
	/*
	 * Clamp write amount to the tile size.  This is mostly
	 * done so that callers can pass in some large number
	 * (e.g. -1) and have the tile size used instead.
	 */
	if ( cc < 1 || cc > tif->tif_tilesize)
		cc = tif->tif_tilesize;

        /* swab if needed - note that source buffer will be altered */
	tif->tif_postdecode( tif, (uint8*) data, cc );

	if (!(*tif->tif_encodetile)(tif, (uint8*) data, cc, sample))
		return (0);
	if (!(*tif->tif_postencode)(tif))
		return ((tmsize_t)(-1));
	if (!isFillOrder(tif, td->td_fillorder) &&
	    (tif->tif_flags & TIFF_NOBITREV) == 0)
		TIFFReverseBits((uint8*)tif->tif_rawdata, tif->tif_rawcc);
	if (tif->tif_rawcc > 0 && !TIFFAppendToStrip(tif, tile,
	    tif->tif_rawdata, tif->tif_rawcc))
		return ((tmsize_t)(-1));
	tif->tif_rawcc = 0;
	tif->tif_rawcp = tif->tif_rawdata;
	return (cc);
}

/*
 * Encode the supplied data and write it to the
 * specified strip.
 *
 * NB: Image length must be setup before writing.
 */
tmsize_t
TIFFWriteEncodedStrip(TIFF* tif, uint32 strip, void* data, tmsize_t cc)
{
	static const char module[] = "TIFFWriteEncodedStrip";
	TIFFDirectory *td = &tif->tif_dir;
	uint16 sample;

	if (!WRITECHECKSTRIPS(tif, module))
		return ((tmsize_t) -1);
	/*
	 * Check strip array to make sure there's space.
	 * We don't support dynamically growing files that
	 * have data organized in separate bitplanes because
	 * it's too painful.  In that case we require that
	 * the imagelength be set properly before the first
	 * write (so that the strips array will be fully
	 * allocated above).
	 */
	if (strip >= td->td_nstrips) {
		if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
			TIFFErrorExt(tif->tif_clientdata, module,
			    "Can not grow image by strips when using separate planes");
			return ((tmsize_t) -1);
		}
		if (!TIFFGrowStrips(tif, 1, module))
			return ((tmsize_t) -1);
		td->td_stripsperimage =
		    TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip);  
	}
	/*
	 * Handle delayed allocation of data buffer.  This
	 * permits it to be sized according to the directory
	 * info.
	 */
	if (!BUFFERCHECK(tif))
		return ((tmsize_t) -1);

        tif->tif_flags |= TIFF_BUF4WRITE;
	tif->tif_curstrip = strip;

	tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
	if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
		if (!(*tif->tif_setupencode)(tif))
			return ((tmsize_t) -1);
		tif->tif_flags |= TIFF_CODERSETUP;
	}
        
	tif->tif_rawcc = 0;
	tif->tif_rawcp = tif->tif_rawdata;  

	if( td->td_stripbytecount[strip] > 0 )
        {
	    /* Force TIFFAppendToStrip() to consider placing data at end
               of file. */
            tif->tif_curoff = 0;
        }
        
	tif->tif_flags &= ~TIFF_POSTENCODE;
	sample = (uint16)(strip / td->td_stripsperimage);
	if (!(*tif->tif_preencode)(tif, sample))
		return ((tmsize_t) -1);

        /* swab if needed - note that source buffer will be altered */
	tif->tif_postdecode( tif, (uint8*) data, cc );

	if (!(*tif->tif_encodestrip)(tif, (uint8*) data, cc, sample))
		return (0);
	if (!(*tif->tif_postencode)(tif))
		return ((tmsize_t) -1);
	if (!isFillOrder(tif, td->td_fillorder) &&
	    (tif->tif_flags & TIFF_NOBITREV) == 0)
		TIFFReverseBits(tif->tif_rawdata, tif->tif_rawcc);
	if (tif->tif_rawcc > 0 &&
	    !TIFFAppendToStrip(tif, strip, tif->tif_rawdata, tif->tif_rawcc))
		return ((tmsize_t) -1);
	tif->tif_rawcc = 0;
	tif->tif_rawcp = tif->tif_rawdata;
	return (cc);
}