Fix (and simplify) blurry Sokol rendering #821
Merged
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I'm by no means experienced with Sokol, but I somehow managed to get a fix.
The first commit already fixes the blurriness, while the second one e968db3 aims at getting rid of the unnecessary upscaling process taken from the examples, but I cannot conveniently test the output on platforms other than macOS/Metal. In particular, I'm not sure whether the image will flip vertically with different backends (with left-handed and right-handed cooordinate systems), so this should not be merged until anyone helps confirm the correctness on other devices — I'd appreciate it!
Apologies for flooding with PRs, and thanks for your effort and time (^ ^;)