NewTempScreenBuffer
NewTempScreenBuffer Allocate an offscreen PixMap and an off screen
buffer
#include <QDOff screen.h> Graphics Devices
QDErr NewTempScreenBuffer( globalRect, purgeable, gdh,
off screenPixMap);
Rect * globalRect ; intersection rectangle
Boolean purgeable ; make offscreen buffer purgeable?
GDHandle *gdh ; receives handle to deepest GDevice
PixMapHandle *off screenPixMap ; receives new offscreen PixMap
NewTempScreenBuffer performs the same functions as
NewScreenBuffer except that it allocates pixels in temporary memory.
Returns: an Error Code. It is one of:
noErr (0) No error
paramErr (-50) Illegal parameter
cNoMemErr (-152) Failed to allocate memory for structures