Loading image into OpenGL ES from c++ code in iPhone - iphone

Question

I'm creating an iPhone game and I need to load an image from a PNG file into OpenGL (and bind it as a texture). I'm using function glTexImage2D to achieve this goal.
I know how to load an image into OpenGL using UIImage (by converting it into CGImage and afterwards drawing into a context).
How can I call my Objective-C code from within C++ code (I'm coding in .mm file)?
Here's the code I'm using and that would work in Objective-C:
NSString *path = [[NSBundle mainBundle] pathForResource:#"texture" ofType:#"png"];
NSData *texData = [[NSData alloc] initWithContentsOfFile:path];
UIImage *image = [[UIImage alloc] initWithData:texData];
if (image == nil)
NSLog(#"Do real error checking here");
GLuint width = CGImageGetWidth(image.CGImage);
GLuint height = CGImageGetHeight(image.CGImage);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
void *imageData = malloc( height * width * 4 );
CGContextRef context = CGBitmapContextCreate( imageData, width, height, 8, 4 * width, colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big );
CGColorSpaceRelease( colorSpace );
CGContextClearRect( context, CGRectMake( 0, 0, width, height ) );
CGContextTranslateCTM( context, 0, 0 );
CGContextDrawImage( context, CGRectMake( 0, 0, width, height ), image.CGImage );
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData);
CGContextRelease(context);
free(imageData);
[image release];
[texData release];
Is there a way to call those UI and Core Graphics functions from C++ code? What files do I have to include?
Thank you in advance.

Answer 1

Solved the problem. Had to find manually and add the Core Graphics framework.