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March 2004
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2004.03.16 08:25 "Re: libtiff and streams", by Andrey Kiselev
On Tue, Mar 16, 2004 at 09:00:32AM +0100, Rob van den Tillaart wrote:
> So if you want to do streaming you should have a TIFF_2_TIFF-F
> normalizer in the front of the pipeline and every filter in the
> pipeline should write according to TIFF-F. But as stated in the RFC
> the filters should be able to read non TIFF-F conforming TIFF format
> to be more generic.
And to place IFD in front of image data it should be enough to call
TIFFCheckpointDirectory() after setting all tags. Something like:
out = TIFFOpen("out.tif", "w");
TIFFSetField(out, TIFFTAG_IMAGEWIDTH, image_width);
TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, bpp);
TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, spp);
TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photo);
TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(out, 0));
TIFFCheckpointDirectory(out);
for (i = 0; i < image_height; i++)
TIFFWriteScanline(out, buf + i * image_width * spp, i, 0);
TIFFClose(out);
Just a suggestion fro those, who want to create TIFFs, suitable for
sequental access.
Andrey
--
Andrey V. Kiselev
Home phone: +7 812 5274898 ICQ# 26871517