BuildMapper builds a matrix to map a buffer to a window.

IndexOfString finds the index of a string in an array of strings.

IsClicked determines if mouse was in the bounds.

LoadPicture parses an Asset to a pixel Picture.

LoadTTF loads a TrueType font stored as an asset.

NewDeltaTimer starts a new DeltaTimer.

RectIsClicked is a simpler IsClicked.

Scramble returns a scramble string.

DeltaTimer manages TotalTime and LastFrame time.