How to call SetROP2 to set the current foreground mix mode in GDI+

[°Ë´óɽÈË]

Hi guys,

As you know, we can call SetROP2 to set the current foreground mix mode
in GDI. But I doesn't work in GDI+.
The step is: GetDC --> SetROP2 -->Graphics.FromDC, then draw sth by graphics
object.

How to realize it in GDI+?

 

[Bob Powell [MVP]]

The raster-op modes will not work in GDI+ at-all.

You can use SetROP2 and then draw exclusively with GDI commands via interop
but using GDI+ commands on a Graphics object created from a DC which has had
the raster-op modified will show no change.

--
Bob Powell [MVP]
Visual C#, System.Drawing

Image transition effects, snap-to-grid and Layered Windows are
all discussed in May's edition of Well Formed for C# or VB programmers
http://www.bobpowell.net/currentissue.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/gdiplus_faq.htm

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[John Wood]

If you're trying to XOR-on a line, you can use
ControlPaint.DrawReversibleLine.
There are some other options too, for more read this:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaskdr/html/askgui02172004.asp

Hope that helps.