[wxMSW 2.8] alpha+antialiasing support

[Bill Baxter]

First, you need to enable wxGraphicsContext in setup.h when you build
wxWidgets on MSW.  And you need to use wxGCDC (or wxGraphicsContext)
to do your drawing.

--bb

On 8/10/07, Chad Wagner <chad at chadawagner.com> wrote:
> I hope these aren't stupid questions, I'm usually on a Mac platform,
> and I've searched for answers without any luck.  Answers in the form
> of "duh, look here" are happily accepted ;-p
>
> My gui uses all custom controls, consisting of various bitmaps (png
> with alpha), lines, splines, text, etc. all of which at some point
> utilize the alpha channel.  On Mac, I can draw a semi-transparent
> line by setting the pen with a color using alpha e.g. dc.SetPen(wxPen
> (wxColor(255,255,255,127))); dc.DrawLine(x1,y1,x2,y2);  The line is
> anti-aliased so it appears smooth, and the alpha value of the color
> is used appropriately.
>
> porting to wxMSW, this is not the case.  the line is jagged and the
> alpha is disregarded.  is there a way to do this, is there a
> different module or feature I need to enable, an entirely different
> method I haven't thought of to circumvent the issue, or how is this
> usually handled?  is there something completely basic that I'm just
> overlooking? (I'm also quite sleep-deprived!)  It looks so terrible
> I'm sure there has to be a way...
>
> any advice is greatly appreciated.
>
> thanks,
> chad
>
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