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Xor function behavior

Posted on 1997-08-28
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Last Modified: 2013-11-20
I am using the Xor function behavior in a device context with the following method: CDC::SetROP2(XORPEN). It works quite well as far as drawing lines is concerned, but doesn't work with  text.
My problem is that I want this behavior for a line and a text simultaneously. How is it possible?
Thanks, Nicolas,
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Question by:Nicolas060297
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2 Comments
 
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Accepted Solution

by:
belov earned 100 total points
ID: 1305030
You cannot alter text output using SetRop2.
You may want to call PatBlt function with
PATINVERTand approapriate brush selected
into that device context after drawing text and line.

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Author Comment

by:Nicolas060297
ID: 1305031
I have tried to use the PatBlt function, but it doesn't work.What I have tried to do is :            
MyObject::Draw(CDC* pDC)
{
....
CBrush myBrush = pDC->SelectBrush(backgroundBrush);
CSize      TextSize = pDC->GetTextExtent(myText);
pDC->TextOut(x,y, myText);
pDC->PatBlt(x,y,TextSize.cx,TextSIze.cy,PATINVERT)
}
The function Draw is called twice : one for drawing, one for erasing, and it doesn't work properly
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