More LibPng!

http://old.nabble.com/problem-using-png_set_tRNS-td13425379.html
the only way to add a transparent color using is ... to manually search and swap in IDAT.

PNG is the worst graphics format ever! Use GIF or TGA where possible.

>>4
OpenGL, where before drawing a sprite on screen you have to write pages of boilerplate shit.
Oh, nothing prevents you from blitting your sprites with glDrawPixels, it will only be ridiculously slower and you won't get free blending, rotation and scaling.