Attempt to open the specified joystick device

Parses an SDL_GameControllerDB line and adds it to the mapping list

Poll state of absolute axes

Retrieves the available modes for the specified monitor

Makes the surface considered as XRGB instead of ARGB.

traverse the layout to locate the nearest character to a display position

discard the oldest entry in the undo list

find the x/y location of a character, and remember info about the previous row in case we get a move-up event (for page up, we'll have to rescan)

canoncialize the selection so start <= end

create the png data from post-deflated data

this function is designed to support animated gifs, although stb_image doesn't support it two back is the image from two frames ago, used for a very s

decode one 64-entry block--

get some unsigned bits

set up the kernels

read 16bit value and convert to 24bit RGB

find minimum y position if it starts at x1