[OSM-dev] render_expired for zoom 19 and metatiles

[Stephan Knauss]

On 16.01.2011 20:49, Jon Burgess wrote:
> On Sun, 2011-01-16 at 20:08 +0100, Stephan Knauss wrote:
>> Would changing all these magic numbers into 19 do the trick? I would
>> skip the twopow array. Or will I be breaking something not that obvious?
> I'm afraid I can not answer that.

It did break on an integer overflow as all numbers are just 32 bit 
unsigned int.
I made the fourpow and twopow bigger, that helped a lot.

Also used the MAX_ZOOM define instead of all the 18s in the code.

Tested with z19. I also expect it to work with z20, but did not test it. 
z20 would need 2GB more memory than z19.

Available in SVN.

Stephan