I'm using GLKTextureLoader to load images from the photo roll, but any time an image that was shot in portrait aspect ratio is loaded, it ends up being treated as a landscape aspect image, rotated 90 degrees off.
I believe the UIImage from the photo roll will need to be rotated and redrawn using Quartz, but I don't really know where to begin. I thought I might be able to modify the popular UIImage+Resize.h library, but when I try to load a UIImage that has been simply resized with that library, the GLKTextureLoader fails, suggesting to me that some information it relies on is lost in the process.