[NovaCoder]

This is using the CyberGFX API.

declarations:

#include <cybergraphics.h>
#include <inline/cybergraphics.h>

struct Library *CyberGfxBase;

UBYTE *chunkyBackBuffer // your chunky back pixel data!

Setup stuff:

    CyberGfxBase = OpenLibrary ("cybergraphics.library", 0);
	if (CyberGfxBase == NULL) {
		error("Cannot open cybergraphics.library");
	}

Update screen:

UBYTE *baseAddress;
APTR  bitmapHandle;



bitmapHandle = LockBitMapTags(_hardwareScreen->ViewPort.RasInfo->BitMap,
									LBMI_BASEADDRESS, (ULONG)&baseAddress,
									TAG_DONE);

if (bitmapHandle) {
	CopyMemQuick(chunkyBackBuffer, baseAddress, _videoMode.screenWidth * _videoMode.screenHeight);

	UnLockBitMap(bitmapHandle);
}

clean up:

    if (CyberGfxBase) {
		CloseLibrary (CyberGfxBase);
		CyberGfxBase = NULL;
	}