nanogui: loading images from memory
Subject:
Re: [nanogui] loading images from memory
From:
Jordan Crouse ####@####.####
Date:
2 Jan 2002 18:42:21 -0000
Message-Id: <E16LqJJ-0004E5-00@ns.censoft.com>
> 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.
Funny you should mention that, we have been telling Greg that we need to have
variable depth pixmaps for a while now.
It wouldn't be *too* messy, the only thing we would need is a set of really
good conversion blit routines (especially to and from a depth of 1 (for
bitmaps)). If anyone has any that they have been working on and want to
donate to the cause, we can write all the supporting code pretty quickly.
Jordan
On Wednesday 02 January 2002 11:26, Julian Smart mentioned:
> 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.
>
>
> Thanks,
>
> Julian
