ObtainGIRPort

Set up a RastPort for a custom gadget.

Declaration

Source position: intuition.pas line 3553

Arguments

Function result

A pointer to a RastPort that may be used for gadget rendering. This pointer may be nil, in which case you should do no rendering. You may (optionally) pass a nil return value to ReleReleaseGIRPort().

Description

Sets up a RastPort for use (only) by custom gadget hook routines. This function must be called each time a hook routine needing to perform gadget rendering is called, and must be accompanied by a corresponding call to ReleaseGIRPort().

Note that if a hook function passes you a RastPort pointer, e.g., GM_RENDER, you needn't call ObtainGIRPort() in that case.

See also