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October 2005

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2005.10.24 07:07 "How can I remove tag from IFD?", by Eugene Shebeko

2005.10.24 18:11 "Re: How can I remove tag from IFD?", by Frank Warmerdam

2005.10.25 09:53 "Re: How can I remove tag from IFD?", by Eugene Shebeko

2005.10.25 11:21 "Re: How can I remove tag from IFD?", by Eugene Shebeko

2005.10.25 11:21 "Re: How can I remove tag from IFD?", by Eugene Shebeko

> I am not aware of a public functions to "unset" a flag in a
> loaded directory, though it wouldn't be all that hard to add.

I get this. Seems it's work.


int TIFFEraseField(TIFF* tif, ttag_t tag)
{
        const TIFFFieldInfo* fip = _TIFFFindFieldInfo(tif, tag, TIFF_ANY);
        TIFFDirectory* td = &tif->tif_dir;
        int i;

        if(!fip||isPseudoTag(tag))return 0;

        if(fip->field_bit!=FIELD_CUSTOM)
        {
                TIFFClrFieldBit(tif,fip->field_bit);
                return 1;
        }
        
        for (i=0;i<td->td_customValueCount;i++)
        {
                TIFFTagValue *tv = td->td_customValues + i;
                if (tv->info->field_tag != tag)
                        continue;

                if (tv->value)_TIFFfree(tv->value);
                memmove(tv,tv+1,(td->td_customValueCount-1-i)*sizeof(TIFFTagValue));
                --td->td_customValueCount;
                return 1;
        }

        return 0;
}