iOS glCreateShader returns 0

[Blakeasd]

Hello,

For some reason whenever I set either a GLuint or a regular unsigned int equal to glCreateShader, it returns 0?? Take a look at this snippet of code:

The code is in viewDidLoad:

    self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
    GLKView *view = (GLKView*)self.view;
    view.context = self.context;
    view.drawableDepthFormat = GLKViewDrawableDepthFormat16;
    
    glEnable(GL_CULL_FACE);
    glEnable(GL_DEPTH_TEST);
    
    int width = self.view.bounds.size.width;
    int height = self.view.bounds.size.height;
    
      
    
    // Read vertex shader source
    NSString *vertexShaderSource = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"VertexShader" ofType:@"vsh"] encoding:NSUTF8StringEncoding error:nil];
    const char *vertexShaderSourceCString = [vertexShaderSource cStringUsingEncoding:NSUTF8StringEncoding];
    
    // Create and compile vertex shader
    GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
    glShaderSource(vertexShader, 1, &vertexShaderSourceCString, NULL);
    glCompileShader(vertexShader);
    
    GLint compiled;
    
    glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &compiled);
    if (!compiled) {
        GLint infoLen = 0;
        glGetShaderiv(vertexShader, GL_INFO_LOG_LENGTH, &infoLen);
        if (infoLen > 1) {
            char *infoLog = malloc(sizeof(char)*infoLen);
            glGetShaderInfoLog(vertexShader, infoLen, NULL, infoLog);
            NSLog(@"Error compiling shader: %s",infoLog);
            free(infoLog);
        }
        exit(1);
    }
    
       if(vertexShader == 0){
        
        NSLog(@"Some sort of vertex error");
    }
    
    NSLog(@"%i",vertexShader);

No compiling errors, yet my if statement testing for a NULL shader is called and the value of the shader is 0.

Could anyone assist me in finding what's happening?

Thanks!

 

[ArtOfWarfare]

0 indicates there was an error creating the shader. It seems like you probably already knew that, though.

 

[Blakeasd]

Perhaps it's a bug in Xcode or the iOS Simulator? I took the exact same project with the exact same code and ran it with the iPhone Simulator rather then the iPad Simulator (which was what I was using before) and it works without any problems.