Hi Folks,
I think I found some strange behaviour using DrawImage on Windows 7/x64. It
left me scratching my head. I reduced it to the demo below.
The code repeats, each pass a red lower and right edge are drawn and a bi-level
pattern representing a broken 2x8 bar is drawn x,0 and with each pass x
advances. Any event (e.g.keypress) is used to slow it down for visibility.
I expected that the 2x8 bar would just slide across ending up to the right of
the red line. What I got was the bar sliding with truncation on the right.
The bar gets shorter and shorter eventually vanishing!
link ximage,printf
procedure main()
printf("&version=%s",&version)
&window := open("DrawImage
Behaviour","g","size=200,200","pos=100,100","bg=black")
every x := 0 to 16 by 1 do {
EraseArea()
WAttrib("fg=red")
DrawLine(0,20,9,20,9,20,9,0)
WAttrib("fg=white")
DrawImage(x,0,"8,~E7E7")
Event()
}
close(&window)
end
Output: &version=Unicon Version 12.0. July 13, 2011
Thanks David
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