Draw image from a buffer in iOS

I'm currently working on an iOS project which is a sort of a client VNC. The server-client connection is successfully 开发者_运维问答established. The program receives the screen image in RAW format and stocks it in a buffer.

My question is how can I draw the buffer in a UIView so that when de buffer is updated so does the view.

I've read the OpenGL ES Programming Guide for iOS

I suppose this is the solution of my problem but I'm really confused. Can someone gives me an example about how to render a buffer in a UIView ? Or if someone has a better solution ?

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RemoteScreenController.m
- (void) setMappedPtr:(unsigned char *)ptr {

    m_mappedPtr = ptr;
    int bitsPerComponent = 8;
    int bitsPerPixel = 32;
    int bytesPerRow = 4 * 1680;
    CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, m_mappedPtr, 1680*1050*4, NULL);
    CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();      
    CGBitmapInfo bitmapInfo = kCGImageAlphaNoneSkipLast;
    CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;

    CGImageRef imageRef = CGImageCreate( 1680, 1050, bitsPerComponent, bitsPerPixel, 
                                                                                bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);

    UIImage *myImage = [UIImage imageWithCGImage:imageRef];
    myView = [[UIImageView alloc] initWithImage:myImage];
    [self.view addSubview:myView];

In my data manager class I have a reference to RemoteScreenController. When the first buffer is received, it calls setMappedPtr to initialize the image and add it to the view. Then the buffer is updated by another class.

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Check out CGImageCreate(), which can then be used to create a proper UIImage ([UIImage imageWithCGImage:cgImage]) from your raw data. Then create a UIImageView and add it to a UIView for display.

For OpenGL, a CGImage should be all you need (as in this example).

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Finally I create a CGDataProviderRef and a 'CGImageRef' every time when my buffer is updated, then with [imageView setImage:[UIImage imageWithCGImage:imageRef]]; I redraw the image manually. I'm quite sure there's better solutions, I'm open for all discussions.