Image manipulation using glsl

[Tom Burdick]

I'd suggest using rectangle textures instead of npot texture2d's. The rects 
are faster on older hardware.

-Tom

On Sunday 21 January 2007 09:00, Michael Thaler wrote:
> Hi,
>
> I have written a small program that uses the OpenGL Shading Language for
> image manipulation. Maybe someone is interested in it. The code is at:
>
> http://users.physik.tu-muenchen.de/mthaler/code/image_manipulation.tar.gz
>
> It uses Qt4 and you need a driver that supports OpenGL 2.0. The program is
> very simple and lots of stuff does not work.
>
> Currently you can load an image (but the width and height has to be a power
> of 2, e.g. 512 x 512 or 1024 x 512) and apply a given filter to the image.
> Currently blur, gaussian blur, sharpen, mean removal, emboss laplacian and
> emboss vertical/horizontal are available. Custom convolutions do not yet
> work nor does saving the image. If you load a bigger image than the default
> one, the main window doesn't currently get resized, but you can just do it
> by hand.
>
> Todo: use non power of two extension to allow arbitrary sized images and
> make it possible to save the image. And of course tons of other stuff.
>
> If someone wants to improve it a bit, it would be nice if you send me the
> changes.
>
> Greetings,
> Michael
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