From: Maurizio Colucci <seguso.forever at tin.it>
To: lablgtk <lablgtk at kaba.or.jp>
Subject: Loading a texture from file and applying it?
Date: Wed, 18 Aug 2004 18:45:37 +0200
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Hello again,

In lablgl + lablgtk, I need to load a texture from file and apply it to a 
triangle.

More precisely: GlTex.image2d wants a byte array as a GlPix. I need to know 
how to create a GlPix from a png file (or similar). The GlPix should have 
rgba format, and the png file may not have alpha information.

I read the example texturesurf.ml, but it creates the GlPix by hand: it 
creates a Pixmap with GLPix.create, then fills it by converting it to raw 
(GlPix.to_raw) and then uses Raw.sets to set the pixels. This seems a bit 
overkill. Of course I could parse the PNG by hand, then set the pixels with 
Raw.sets, but is there any easier way?

Thanks

Mau