Gui programming part 4

For some reason Brick Atelier hangs for a long time when loading tiles. That bug appeared from nowhere and maybe related to a memory leak. GDB gets puzzled of course (I'm developing BA with DevC++) and has no idea where the bug is, it doesn't even report anything. So, once again I need to move this project to Visual C++ to find bugs. The map editor is quite ok, I found a partial solution to the ellipse routine which is giving me a big headache. It's this stuff again: the world doesn't have a C++ ellipse routine that produces symmetric bresenham type (one pixel edges) ellipses in all x/y radius values. I'm too dumb to understand math in that context and unable to program ellipse routine myself. Well, maybe some day.