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2004 May 11 21:45

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Re: [vox-tech] Success with fltk and SDL_image
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Re: [vox-tech] Success with fltk and SDL_image



BTW, just found that SDL_gfx does what you need:

   http://www.libsdl.org/libraries.php?match_name=SDL_gfx

-Mark


On Tue, 11 May 2004, Mark K. Kim wrote:

> Options:
>
>   1. Texture map the image onto a 3D surface parallel to the display, then
>      tell the 3D graphics card to rotate and scale the surface!  =)
>
>   2. Get a library that does it for you from www.libsdl.org/libraries.php
>
>   3. Do it yourself.  There are lots of websites and books that talk about
>      it.  You can probably figure it out yourself with some matrix
>      operations, too.
>
> #2 is probably the most reasonable thing to do...
>
> -Mark
>
>
> On Tue, 11 May 2004, Jan W wrote:
>
> > Hi all:
> >
> > Just a question:
> >
> > Has anyone used SDL_image to do scaling and rotation?  If so, is there anything
> > that I could use to do basic image manipulations?  I am looking for code
> > examples/basic theories so that I can start off down a (more or less)
> > reasonable path...
> >
> > I had an application that used fltk_images and libtiff to open images.  It was
> > large, unwieldy, and unfortunately, a bit slow.  SDL_image was a bit faster b/c
> > (at least, this is what I _think_... I'm still such a noob) of the way that I
> > allocated the buffer for the image:
> > (img_w)*(img_h)*(sizeof(current_color_depth)).  So if you had a 24bit depth
> > color display, and a B/W image, I allocate enough space for a 24bit color...
> > not the right thing...  It would have been tough to recode (for some reason
> > that I can't recall), so I decided to try something different...
> >
> > Now, SDL does the work for me, and just leaves me with a surface... awesome.
> >
> > So if anyone has any hints/tips/tricks/caveats on SDL surface manipulation, I
> > would love any tidbits that might float my way...  and if anyone is interested
> > in seeing my code (yea, I have the coding style of an 8 year old), just don't
> > laugh when you do.... (write me off list and I'll send a copy)
> >
> > --thanks
> >
> > jan
>
> --
> Mark K. Kim
> AIM: markus kimius
> Homepage: http://www.cbreak.org/
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-- 
Mark K. Kim
AIM: markus kimius
Homepage: http://www.cbreak.org/
Xanga: http://www.xanga.com/vindaci
Friendster: http://www.friendster.com/user.jsp?id=13046
PGP key fingerprint: 7324 BACA 53AD E504 A76E  5167 6822 94F0 F298 5DCE
PGP key available on the homepage
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