Thank you both. I'll be sure to try these out. As a matter of fact, I _am_ using JuicyPixels. I didn't realize there was a version on github which uses Vector. Thanks for letting me know.
Regards, - clark On Mon, Feb 6, 2012 at 5:55 PM, Jason Dagit <[email protected]> wrote: > On Mon, Feb 6, 2012 at 12:00 PM, Clark Gaebel > <[email protected]> wrote: > > Using the OpenGL package on Hackage, how do I load a texture from an > array? > > The answer will depend on a few things: > * Which OpenGL package you use, for example OpenGL vs. OpenGLRaw > * What type of 'array' you use. > > In the case of the OpenGL package you need to create a PixelData value > and pass that on. You can find example code here: > > https://github.com/dagit/nehe-tuts/blob/447f5471f3e7fe07b44dc5d2d87c4a95be35ce75/lesson06.hs > > https://github.com/dagit/nehe-tuts/blob/447f5471f3e7fe07b44dc5d2d87c4a95be35ce75/Util.hs > > > > In the red book[1], I see their code using glGenTextures and > glBindTexture, > > but I can't find these in the documentation. Are there different > functions I > > should be calling? > > Yes. As you've noticed the API of the OpenGL package sometimes > (often?) differs from that of the C OpenGL api. If that's what you're > more familiar with then take a look at OpenGLRaw. Here is how to do > the same thing as the previous two links but using OpenGLRaw: > https://github.com/dagit/nehe-tuts/blob/master/lesson06.hs > https://github.com/dagit/nehe-tuts/blob/master/Util.hs > > Instead of using Arrays as defined by Haskell98, I would recommend > using something else like Data.Vector. The standard arrays must be > converted to something else to work with OpenGL. Data.Vector on the > other hand allows direct access to the pinned pointer and is thus > suitable for use with OpenGL as is. > > Have you seen JuicyPixels? The version on hackage uses arrays, but the > version in github uses vector. I'd recommend using the version from > github. It's faster and it will be easier to pass the data to OpenGL: > https://github.com/Twinside/Juicy.Pixels > > > Good luck! > Jason > >
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