Re: tile size in filters

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Hans Petter Jansson wrote:> On Thu, 2008-10-09 at 11:08 +0200, Dierk Fröhling wrote:> >> I need to handle all pixels of an image in one tile for my new filter.>> The problem is that every pixel in the filtered image should depend on>> values from all other pixels...>> I tried out different things from other (example) filters (including the>> bounding box stuff) but my image is always split into several tiles.>> Is there any way to tell the gegl infrastructure to use the whole image>> as one tile as input pad?>> The bounding box stuff doesn't work especially because the size of>> images can differ.>> I know that this could lead to memory problems with really big images...> > I wrote a color reduction filter that does Floyd-Steinberg dithering,> where each pixel depends on all previous pixels (the bottom-right pixel> depends on the entire image). It should be among the workshop filters.> Maybe that'd be useful to look at.
This worked up to a certain size of images - but with an image with 3112x 4200 pixels I get this message from gegl:
** Message: unable to write tile data to self: No space left on device(-1/131072 bytes written)
There is enough space in my /tmp directory and all other possibleworking directories for gegl - 2GB of memory should be enough as well...It's not that my filter won't work at all with these big images - butonly in parts. It seems that gegl splits it into tiles again...
Dierk

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