# this function writes a coloured pixel into the chunky buffer

# use this function with care, it doesn't check for bounds or if chunky array is correct

# PutPixelFast(chunky:r3:PTR TO chunky,x:r4:LONG,y:r5:LONG,colour:r6:LONG)

	.text
	.global	_PutPixelFast

_PutPixelFast:
	lwz	r0,0(r3)
	mullw	r5,r5,r0
	add	r4,r5,r4		# r4 now contains position in buffer
	lwz	r3,8(r3)		# r3 now contains pointer to chunky buffer
	stbx	r6,r3,r4
	blr

	.type	_PutPixelFast,@function
	.size	_PutPixelFast,$-_PutPixelFast