bulia byak wrote:
Thanks, indeed this is a bug. There's a limitation of the size of buffer that Inkscape can allocate, about 5000 by 5000 pixels. However this should not prevent your 7000 by 8000 file from exporting, because the export is done piecewise. So the problem is that the piecewise export fails when there's a blurred object, and looks like it tries to allocate the entire 7000 by 8000 buffer for the blurred ellipse. Instead it must only allocate the current strip plus approx the 2.5 times stdDeviation of the blur (that's the difference at which the blur fringe is virtually invisible). Jasper, can you please look into that, as you last changed that code? It would be nice to reduce the memory requirements of export with blur - without introducing artefacts, of course :)
I will definitely take a look, but it could take a while, as I'm currently quite busy. If someone else wants to take a look, my guess is that it's "simply" a matter of getting the boundingboxes right.
Basically what I did earlier was adjust the visible area (or something like that, I'd have to check) of the export area to the entire image. Usually this doesn't mean that the entire image is drawn for each stripe, but especially if you have objects spanning the entire image this probably could (I couldn't figure out exactly how this all worked, when I tried actually modifying the clipping code I got some results I didn't expect). What it should do instead is just extend the current stripe by the amount needed by any blurs in the current stripe.
One theory I had about why modifying the clipping code didn't work (for me) and why the current set up does work was that perhaps some calculations where creating bboxes with negative coordinates and that possibly something didn't like that much, since I suddenly got off set images and so on, but it's mostly guesswork.
BTW, if someone gets this fixed there is a good chance it would also fix bug 1643892.