NoPurgePixels
To prevent the Memory Manager from purging the base address for an offscreen pixel image, use the NoPurgePixels procedure.
PROCEDURE NoPurgePixels (pm: PixMapHandle);
pm
- A handle to an offscreen pixel map.
DESCRIPTION
The NoPurgePixels procedure marks the base address for an offscreen pixel image as unpurgeable. To get a handle to an offscreen pixel map, use the GetGWorldPixMap function, described on page 6-31. Then supply this handle for the pm parameter of NoPurgePixels.
SPECIAL CONSIDERATIONS
The NoPurgePixels procedure may move or purge memory blocks in the application heap. Your application should not call this procedure at interrupt time.
ASSEMBLY-LANGUAGE INFORMATION
The trap macro and routine selector for the NoPurgePixels procedure are
| Trap macro | Selector |
| _QDExtensions | $0004000C |
