[ruby-opengl-devel] ruby-opengl and RMagick

Gregory Seidman gsslist+rgl at anthropohedron.net
Sun Oct 14 19:07:40 EDT 2007

On Sun, Oct 14, 2007 at 06:50:29PM -0400, Cassius Rosenthal wrote:
> Hello all,
> I am interested in using opengl to resize images.  I have ruby-opengl
> running, and in irb I'm trying to pass an RMagick image to
> GL.TexImage2D, but I get a type error.  The roadmap page on the web site
> says, "Add image handling wrapper for easy image handling."  Obviously
> that hasn't been implemented yet, but I am encouraged that I'm not the
> only one interested in functionality like that.
> irb> GL.TexImage2D( GL::TEXTURE_2D, 0, 3, 150, 150, 0, GL::RGB,
> GL::BYTE, @image)
> TypeError: type mismatch:#<Class:0x2aaaaf9810a0>
>         from (irb):27:in `TexImage2D'
>         from (irb):27
> Any hints on how to pass an instance of an RMagick image to GL?  Has
> anybody done anything similar?

Take a look at my solution to Ruby Quiz #129:

It has code that uses RMagick to generate an image that is then used as a
texture map.

> Thanks!
> -Casey

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