UIImagePickerController editing allowed locks UIImage to max size of 320x320

Question

Update:

With iPhone OS 3.0+, the whole UIImagePickerController API has changed. This question and answer should be considered 2.2. legacy code.

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When using

Answer 1

Better late than never: here's the source for the orientationTransformForImage function

CGAffineTransform orientationTransformForImage(UIImage *image, CGSize *newSize) {
    CGImageRef img = [image CGImage];
    CGFloat width = CGImageGetWidth(img);
    CGFloat height = CGImageGetHeight(img);
    CGSize size = CGSizeMake(width, height);
    CGAffineTransform transform = CGAffineTransformIdentity;
    CGFloat origHeight = size.height;
    UIImageOrientation orient = image.imageOrientation;
    switch(orient) { /* EXIF 1 to 8 */
        case UIImageOrientationUp:
            break;
        case UIImageOrientationUpMirrored:
            transform = CGAffineTransformMakeTranslation(width, 0.0f);
            transform = CGAffineTransformScale(transform, -1.0f, 1.0f);
            break;
        case UIImageOrientationDown:
            transform = CGAffineTransformMakeTranslation(width, height);
            transform = CGAffineTransformRotate(transform, M_PI);
            break;
        case UIImageOrientationDownMirrored:
            transform = CGAffineTransformMakeTranslation(0.0f, height);
            transform = CGAffineTransformScale(transform, 1.0f, -1.0f);
            break;
        case UIImageOrientationLeftMirrored:
            size.height = size.width;
            size.width = origHeight;
            transform = CGAffineTransformMakeTranslation(height, width);
            transform = CGAffineTransformScale(transform, -1.0f, 1.0f);
            transform = CGAffineTransformRotate(transform, 3.0f * M_PI / 2.0f);
            break;
        case UIImageOrientationLeft:
            size.height = size.width;
            size.width = origHeight;
            transform = CGAffineTransformMakeTranslation(0.0f, width);
            transform = CGAffineTransformRotate(transform, 3.0f * M_PI / 2.0f);
            break;
        case UIImageOrientationRightMirrored:
            size.height = size.width;
            size.width = origHeight;
            transform = CGAffineTransformMakeScale(-1.0f, 1.0f);
            transform = CGAffineTransformRotate(transform, M_PI / 2.0f);
            break;
        case UIImageOrientationRight:
            size.height = size.width;
            size.width = origHeight;
            transform = CGAffineTransformMakeTranslation(height, 0.0f);
            transform = CGAffineTransformRotate(transform, M_PI / 2.0f);
            break;
        default:
            ;
    }
    *newSize = size;
    return transform;
}