C++ TIFFGrowStrips函数代码示例

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

    if (!WRITECHECKSTRIPS(tif, module))
        return ((tsize_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, tif->tif_name,
                         "Can not grow image by strips when using separate planes");
            return ((tsize_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(td->td_imagelength, td->td_rowsperstrip);

        if (!TIFFGrowStrips(tif, 1, module))
            return ((tsize_t) -1);
    }

    tif->tif_curstrip = strip;
    tif->tif_row      = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
    return (TIFFAppendToStrip(tif, strip, (tidata_t) data, cc) ?
            cc : (tsize_t) -1);
}

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 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 strip.
 *
 * NB: Image length must be setup before writing.
 */
tsize_t
TIFFWriteEncodedStrip(TIFF* tif, tstrip_t strip, tdata_t data, tsize_t cc)
{
	static const char module[] = "TIFFWriteEncodedStrip";
	TIFFDirectory *td = &tif->tif_dir;
	tsample_t sample;

	if (!WRITECHECKSTRIPS(tif, module))
		return ((tsize_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, tif->tif_name,
		"Can not grow image by strips when using separate planes");
			return ((tsize_t) -1);
		}
		if (!TIFFGrowStrips(tif, 1, module))
			return ((tsize_t) -1);
		td->td_stripsperimage =
		    TIFFhowmany(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 ((tsize_t) -1);
	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 ((tsize_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 = (tsample_t)(strip / td->td_stripsperimage);
	if (!(*tif->tif_preencode)(tif, sample))
		return ((tsize_t) -1);

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

	if (!(*tif->tif_encodestrip)(tif, (tidata_t) data, cc, sample))
		return ((tsize_t) 0);
	if (!(*tif->tif_postencode)(tif))
		return ((tsize_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 ((tsize_t) -1);
	tif->tif_rawcc = 0;
	tif->tif_rawcp = tif->tif_rawdata;
	return (cc);
}

int
TIFFWriteScanline(TIFF* tif, tdata_t buf, uint32 row, tsample_t sample)
{
    static const char module[] = "TIFFWriteScanline";
    register TIFFDirectory *td;
    int status, imagegrew = 0;
    tstrip_t 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);
    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) {
            TIFFError(tif->tif_name,
        "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) {
            TIFFError(tif->tif_name,
                "%d: Sample out of range, max %d",
                sample, td->td_samplesperpixel);
            return (-1);
        }
        strip = sample*td->td_stripsperimage + row/td->td_rowsperstrip;
    } else
        strip = row / td->td_rowsperstrip;
    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(td->td_imagelength,td->td_rowsperstrip);
        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;
        }
        if (!(*tif->tif_preencode)(tif, sample))
            return (-1);
        tif->tif_flags |= TIFF_POSTENCODE;
    }
    /*
     * 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);
    /*
     * Ensure the write is either sequential or at the
     * beginning of a strip (or that we can randomly
     * access the data -- i.e. no encoding).
     */
    if (row != tif->tif_row) {
        if (row < tif->tif_row) {
            /*
             * Moving backwards within the same strip:
             * backup to the start and then decode
             * forward (below).
             */
            tif->tif_row = (strip % td->td_stripsperimage) *
                td->td_rowsperstrip;
            tif->tif_rawcp = tif->tif_rawdata;
        }
        /*
         * Seek forward to the desired row.
         */
//.........这里部分代码省略.........