Large flam3 renders and Oversample 1 problem

[Andrew Ostrovsky]

While required memory will be reported the same with reduction of oversampling from 2 to 1 and doubling the image size, the rendering will not work with large dimensions (ex. 7200 by 5400 at Oversample 1 while working fine at 3600 by 2700 at Oversample 2). While the limitations may have something to do with flam3 abilities to render such large canvases some sort of user feedback would be appreciated, since currently nothing happens to alert the user of the issue.

[Vitor Bosshard (algorias)]

The underlying issue here is that the space reserved for the result image is not taken into account. At a size of 7200x5400 this is not a minor amount of memory. Therefore, the issue is that the former render actually takes less memory than the latter, but this is not correctly reported. Fix will be coming soon.