I've done a bunch of searching the C API docs, interwebs and this forum and can't seem to find an API to draw a pixel on the screen. Did I overlook something? Is there a native API to plot a pixel, like pd->graphics->drawPixel(x, y, color);?
check this, you need to get the bitmapdata first (or the data of the screenbuffer)
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It's pretty silly that we don't have that in the C API (because the function overhead makes it a lot less efficient than accessing the bits directly) but we do in Lua where there's even more overhead. 
I've filed an issue for that, will add the function but also point out in the docs that it's faster access the data buffer directly
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Thank you. I imagine this was likely an oversight of some sort, given how trivial it should be to implement.
It might make sense to add a note to the docs that mentions how it is not as fast as accessing & writing to the screen buffer directly. I imagine it will help new devs write simple stuff allowing them to learn the platform a little better. =)
Do you think the SDK could include macros for drawing pixels, and documentation on how to use them?