nanogui: loading images from memory
Subject:
Re: [nanogui] loading images from memory
From:
Julian Smart ####@####.####
Date:
2 Jan 2002 18:25:25 -0000
Message-Id: <4.2.0.58.20020102182031.05f1aaf0@pop>
At 11:07 AM 1/2/02 -0700, Jordan Crouse wrote:
>We do have such a beast in pre8 - Its called GrLoadImageFromBuffer() and
>GrDrawImageFromBuffer().
>
>The only thing that we are currently missing is a native way to handle
>compiled in XPMs. If the list agrees, I may break the existing XPM support
>by changing the internal decoder to use XPM data (ie, the actual char array),
>instead of an XPM file. Then, we could add a client side function to decide
>an actual XPM file and send across the data. I know Julian would like this,
>but is there anyone who really uses the current XPM support and would get
>angry if I borked it?
Actually I discovered how to (partially) work around it -- wxWindows now has its own,
self-contained XPM decoder, and I'm using this for loading XPM data into a wxImage,
and then using a very dumb piece of code to copy the wxImage to a wxBitmap which
can be drawn onto device contexts.
However, I expect the official MicroWindows API will be a more efficient way to
load XPM data into [wx]Bitmaps more directly.
BTW if anyone knows how to do transparency in MicroWindows (WIN32) using a bitmap
and a mask bitmap, that would be interesting. When I created a mono bitmap and
used that in BitBlt as per normal WIN32 code, MicroWindows complains about the depth
not being suitable for the DC. When I create the mask at the display depth instead, the
operations that work for 'real' WIN32 to do transparency, don't work under MicroWindows.
Thanks,
Julian
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