Created attachment 3345 [details]
How the corners look after upgrading to macOS Mojave

My project is using SDL_RenderCopy to render a texture to the screen. The texture is updated every frame using an array of Uint32s. 

I compiled my project two days ago, before upgrading to macOS Mojave. When run, you can see that the corners of the window are jagged (something I can live with), and the pixels are larger than the size of a pixel on the screen (which is what I wanted). Also, you could see that the pixels were not being interpolated, they were very crisp edges which is what is required for a pixel art game.

I recompiled my project today, after upgrading to macOS Mojave. The edges are now round and smooth (which is a nice bonus), and the pixels are still the expected size (larger than a real pixel). However, now I see that I do not have any crisp edges anymore, they are blurred and smooth, which I do not want.

When trying to fix this issue, I resized the window programmatically using SDL_SetWindowSize, but this did not fix the issue, but caused another. The render was massive and what should have been a small rectangle centered in the middle of the window was offset to the top right corner and filled half the screen.

I am also experiencing the error which causes the screen to appear black initially, but when I move the window it fixes. I understand that this issue is being patched, but I am just mentioning it so that it is known that it is a issue on many systems.

Finally, I noticed that the jagged borders appear when the window is created (while the screen is black), but once I resize or move it, the smooth borders appear.

I have included 4 images, ones prefixed with old_ are of executables that I compiled two days ago but are executing today, and ones prefixed with new_ are of executables that I compiled today.