Colorizing a specific area on the screen.

or if you want to dirrectly affect the pixels in the pixmap without creating a new pixmap

Function replacecolour2:Int(p:TPixmap,old_rgb:Int,new_rgb:Int,threshold:Int)
	Local w:Int = PixmapWidth(p)
	Local h:Int = PixmapHeight(p)
	Local x:Int,y:Int
	Local c:Int
	Local r1:Int,g1:Int,b1:Int
		
'	Local n:TPixmap = CreatePixmap(w,h,pf_BGRA8888)
	
	Local r:Int = (old_rgb Shr 16) & 255
	Local g:Int = (old_rgb Shr 8) & 255
	Local b:Int = (old_rgb Shr 0) & 255
	
'	Local p1:TPixmap = ConvertPixmap(p,PF_BGRA8888)
	
	' scan through image
	x  =0
	While x < w
		y = 0
		While y < h
			c = ReadPixel(p,x,y)
			r1 = (c Shr 16) & 255 
			g1 = (c Shr 8) & 255 
			b1 = (c Shr 0) & 255 
			
			If threshold_check(r,r1,threshold) And threshold_check(g,g1,threshold) And threshold_check(b,b1,threshold)
				WritePixel p,x,y,new_rgb
			EndIf
			
			y:+1
		Wend
		x:+1
	Wend

	Return True	
End Function

if you have an image you can call the routines with

image.pixmaps[frame]

this gets the pixmap for the relevant frame in the image