Re: [BLACKBOX] Transparent Bitmaps (for LaTeX ?)

From: Douglas G. Danforth <"Douglas>
Date: Wed, 26 Nov 2008 15:28:52 -0800

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Robert,
I believe Bluebottle supports transparency.
Perhaps you should ask the [Oberon] team about it.
Perhaps someone like ulrike.glavitsch{([at]})nowhere.xy
-Doug Danforth


Robert wrote:
> Hi
>
> I was wondering how to Restore Transparent Bitmaps.
>
> The functions I have used (eg WinApi.StretchDIBits &
> WinApi.SetDIBitsToDevice)
> do not seem to support transparency. HostBitmaps are 24 bit, and don't
> (I think) support transparency.
>
> I had a look on MSDN, and found a reference to AlphaBlend
> (http://msdn.microsoft.com/en-us/library/ms532324(VS.85).aspx)
> whick looks like it might be on the right track. But there is no
> interface
> to AlphaBlend in the BlackBox WinApi interface.
>
> I thought that it might be desirable to be able to draw LaTeX
> equations (etc) with a transparent background.
>
> Any suggestions would be welcome.
>
> Thanks
>
> Robert
>
>
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Received on Thu Nov 27 2008 - 00:28:52 UTC