Images and Banks

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zawran

@Nicoust, Its from the BlitzPlus manual. You posted the question in the BlitzPlus section, so I assumed its BlitzPlus you are using.

Here is an example of how to poke directly into buffers.

Graphics 640,480,32,2

temp = CreateImage( 256, 256 )
SetBuffer ImageBuffer( temp )
LockBuffer ImageBuffer( temp )
imagebank = LockedPixels()
imagepitch = LockedPitch()
UnlockBuffer ImageBuffer( temp )

SetBuffer BackBuffer()
LockBuffer BackBuffer()
backbank = LockedPixels()
backpitch = LockedPitch()
UnlockBuffer BackBuffer()

While Not KeyHit(1)

	Cls

	; poking random colors into the imagebuffer
		For y =0 To 255
			For x = 0 To 255
				PokeInt( imagebank, y*imagepitch+x*4, Rnd($FFFFFF) )
			Next
		Next

	; poking random colors into the backbuffer
		For y =0 To 255
			For x = 0 To 255
				PokeInt( backbank, y*backpitch+x*4, Rnd($FFFFFF) )
			Next
		Next

	DrawBlock temp, 260, 0

	Flip

Wend
End

@Arctic Fox, you can use copybank to move large amounts of pixel data from a bank to an imagebuffer or the backbuffer.