Am Samstag, 4. Juli 2009 02:13:30 schrieb Conal Elliott:
I'm looking for a way to query the number of available texture units to shaders. In C, I think the value can be extracted with glGetIntegervhttp://www.opengl.org/sdk/docs/man/xhtml/glGet.xmlpassing in GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS.
It depends on your use case if this is the correct part of the OpenGL state. Depending on the shaders where you use the texture units, you should use one of: GL_MAX_TEXTURE_IMAGE_UNITS GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS_ARB GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
There are also getInteger1 and GetMaxCombinedTextureImageUnits in Graphics.Rendering.OpenGL.GL.QueryUtils, but that module isn't exported from the OpenGL package.
Have I missed something?
Yes. ;-) http://hackage.haskell.org/packages/archive/OpenGL/2.2.3.0/doc/html/Graphics... Rendering-OpenGL-GL-Shaders.html#v%3AmaxCombinedTextureImageUnits To find something in the OpenGL package, simply drop the "GL_" or "gl" prefix and use camelCase. Another way to find API entries is the structure of the OpenGL spec, which is mirrored in the module hierarchy. If you still can't find it, I consider this a design and/or documentation bug in my package which I'll happily fix. Cheers, S.