All Databases Inside Mac - Basic Toolbox

UnlockPixels

UnlockPixels Unlock the buffer used by an offscreen graphics world

#include <Quickdraw.h> Graphics Devices

void UnlockPixels( pm );

PixMapHandle pm ; Pixel map handle returned from a

GetGWorldPixMap call

returns none

UnlockPixels unlocks the offscreen buffer. Call UnlockPixels as soon as

the application finishes drawing to or from the offscreen pixel map. You don't

need to call UnlockPixels if LockPixels returned FALSE, because

LockPixels doesn't lock purged pixels. However, calling UnlockPixels on

purged pixels does no harm.

Returns: an Error Code. It is one of:

noErr (0) No error

paramErr (-50) Illegal parameter

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