// set window properties
SetWindowTitle( "image mask" )
SetWindowSize( 1024, 768, 0 )

// set display properties
SetVirtualResolution( 1024, 768 )
SetClearColor(45,0,0)

#constant _RedChannel   1
#constant _GreenChannel 2
#constant _BlueChannel  3
#constant _AlphaChannel 4

_White  = MakeColor(255,255,255)
_Red    = MakeColor(175,0,0)
_Yellow = MakeColor(175,175,0)
_Green  = MakeColor(0,175,0)
_Blue   = MakeColor(0,0,175)

Render()
DrawBox(100,100,200,200,_Red,_Red,_Red,_Red,1)
DrawBox(200,100,300,200,_Green,_Green,_Green,_Green,1)
DrawBox(100,200,200,300,_Blue,_Blue,_Blue,_Blue,1)
DrawBox(200,200,300,300,_Yellow,_Yellow,_Yellow,_Yellow,1)

DrawBox(200,300,400,500,0,0,0,0,1)

Render()

_Boxes       = GetImage(100,100,500,200)
_RenderImage = GetImage(200,300,400,500)

_BoxesSpr = CreateSprite(_Boxes)
SetSpritePosition(_boxesSpr, 100,100)

_renderSpr = CreateSprite(_RenderImage)
SetSpritePosition(_renderSpr, 400,100)

SetImageMask(_RenderImage, _Boxes, _RedChannel,  _RedChannel,  0, 0 )	
SetImageMask(_RenderImage, _Boxes, _GreenChannel,_GreenChannel,0, 0 )
SetImageMask(_RenderImage, _Boxes, _BlueChannel,_BlueChannel,0, 0 )


SetPrintSize(18)
do 	
print("Left is the Source image, Right is the destination image which was originaly blank.")
   print("Notice how the yellow colour is blended automaticaly")
   
	sync()
loop