chickadee » sdl2 » rect-grow!

rect-grow rect dw dhprocedure
rect-grow! rect dw dh #!optional destprocedure

Efficiently increase rect's size by adding to its W and H values. The rect's top left corner will stay the same. See also rect-grow/center!, which keeps the rect's center point the same. The results will be clamped to the range -2147483648 to 2147483647.

dw and dh must be integers. Negative numbers cause the size to decrease (i.e. shrink).

  • rect-grow returns a new managed sdl2:rect.
  • rect-grow! modifies and returns dest. If dest is omitted, rect is modified and returned.

These procedures are available in sdl2 egg version 0.2.0 and higher.