[Tilesathome] lowoom Caption Layer question

[80n]

A patch is needed somewhere in tilesgen.pl.

The following line is wrong:
        elsif (not($SubImage->compare($EmptyLandImage) & GD_CMP_IMAGE)) #
libGD comparison returns true if images are different. (i.e. non-empty Land
tile) so return the opposite (false) if the tile doesn''t look like an empty
land tile

It should be:
        elsif (not($Config{"Layer.$layer.Transparent"}) &
not($SubImage->compare($EmptyLandImage) & GD_CMP_IMAGE)) # libGD comparison
returns true if images are different. (i.e. non-empty Land tile) so return
the opposite (false) if the tile doesn''t look like an empty land tile

80n

On Mon, Mar 10, 2008 at 6:18 AM, Brent Easton <b.easton at exemail.com.au>
wrote:

> >Any tile, at any zoom (8-11) that does not have any part of a caption on
> >it, ends up as a blank tile after the lowzoom_composite layers the
> caption
> >over the captionless tile. I have checked that the caption layer is
> >correct and the captionless tiles look correct also.
>
> I've tracked down the problem, but I am not sure what I am doing wrong.
>
> When I ran the tilesgen.pl x y 8 with the new lowzoom configuration, tiles
> with no captions where created as 67 byte land tiles and uploaded.
>
> Now, when I run the lowzoom_composite.pl, theses tiles with no captions
> are downloading as 256x256 pixel off-white non-transparent tiles and are
> overlaying the captionless tiles. These tiles outght to be coming down as
> 256x256 transparent tiles, or not at all?
>
> Should the blank tiles have been updated in the first place?
>
> Thanks,
> Brent.
>
>
> ____________________________________________________________
> Brent Easton
> Analyst/Programmer
> University of Western Sydney
> Email: b.easton at uws.edu.au
>
>
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