GLKTextureLoader fails when loading a certain texture the first time, but succeeds the second time

Question

I\'m making an iPhone application with OpenGL ES 2.0 using the GLKit. I\'m using GLKTextureLoader to load textures synchronously.

The problem is that for a certain textu

Answer 1

Maybe you've resolved this, but are you using multiple contexts? maybe you should be loading your texture asynchronously with sharegroup.

so instead of using tex = [GLKTextureLoader textureWithContentsOfFile:bundlepath options:options error:&error];

use something like:

GLKTextureLoader *textureloader = [[GLKTextureLoader alloc] initWithSharegroup:self.eaglContext.sharegroup];
GLKTextureInfo *myTexture;
[textureloader textureWithCGImage:_currentForegroundImage.CGImage options:nil queue:nil completionHandler:^(GLKTextureInfo *textureInfo, NSError *error) {
        myTexture = textureInfo;
        if(error) {
            // log stuff
        }
        // do something
}];

Answer 2

I had a similar problem. Is was caused by a texture that had width / height not power of 2. GLKTextureLoader failed on loading this and the following images. Checking glGetError() after each texture load revealed the troublemakers :-).