Possible bug in CopyPixelFast (Blitz 2D)

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Ross C

what, so writing lots of pixels to the screen is faster than using the draw image command? Or am i missing the point?

This example copys pixels across buffers and draws images to the screen. press 1 to get the images being drawn with DrawImage command and press 2 to get the images drawn by CopyPixelFast.

Open in online IDE

Graphics 800,600
SetBuffer BackBuffer()


img=CreateImage(50,50)

SetBuffer ImageBuffer(img)
Color 100,200,255
Rect 0,0,50,50

SetBuffer BackBuffer()

mode=0

Color 50,150,20

While Not KeyHit(1)

	Cls

	If KeyHit(2) Then mode=0
	If KeyHit(3) Then mode=1
	
	If mode=0 Then
				For loop=0 To 8
					For loop1=0 To 8
						DrawImage img,loop*52,loop1*52
					Next
				Next
	ElseIf mode=1 Then
				LockBuffer BackBuffer()
				LockBuffer ImageBuffer(img)
				For loop=0 To 8
					For loop1=0 To 8
						For loop2=0 To ImageWidth(img)-1
							For loop3=0 To ImageHeight(img)-1
								CopyPixelFast loop2,loop3,ImageBuffer(img),(loop*52)+loop2,(loop1*52)+loop3,BackBuffer()
							Next
						Next
					Next
				Next
				UnlockBuffer ImageBuffer(img)
				UnlockBuffer BackBuffer()
	End If
	
	If MilliSecs()<timer+1000 Then
								frame=frame+1
	Else
								fps=frame
								frame=0
								timer=MilliSecs()
	End If
	
	Text 0,0,"FPS="+fps
	Flip False
Wend
End

I do apoligise if i'm talking about something different from you ^_^