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graphic functions - CopyWindow() [message #94794]

Mon, 16 October 2017 05:31

Markus Schmassmann
Messages: 129
Registered: April 2016

Senior Member

Hi,

as illustrated in the code below, when I make a plot in direct graphics
all the pixels have either the background color or the plotted color,
but when I use graphic functions and then retrieve the screen with
COPYWINDOW() the colors of the pixels are all over the greyscale.
Setting antiAlias=0 doesn't help either.

Is there a way to retrieve a graphic function screen without expanding
the colortable beyond what originally went into it for plotting?

I hope that by reducing the colortable I can reduce the file size of a
video I create using the COPYWINDOW() method.

Thanks for any help,
Markus

p=plot(/test)
hfg =histogram(p.CopyWindow())
hfg2=histogram(p.CopyWindow(antiAlias=0))
device,decomposed=1
plot, hfg>.2,/ylog,background='FFFFFF'x,color=0
oplot, hfg2>.2,color=0
hdg=histogram(tvrd())
print, [hdg[[0,255]],total(hdg[1:254],/int)]

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[Message index]

		graphic functions - CopyWindow() By: Markus Schmassmann on Mon, 16 October 2017 05:31
		Re: graphic functions - CopyWindow() By: wlandsman on Mon, 16 October 2017 08:51

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