/*

     File: LargeImageDownsizingViewController.h 

 Abstract: The primary view controller for this project. 

  Version: 1.1 

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*/

#import <UIKit/UIKit.h>

@class ImageScrollView;

@interface LargeImageDownsizingViewController : UIViewController {

    // The input image file

    UIImage* sourceImage;

    // output image file

    UIImage* destImage;

    // sub rect of the input image bounds that represents the 

    // maximum amount of pixel data to load into mem at one time.

    CGRect sourceTile;

    // sub rect of the output image that is proportionate to the

    // size of the sourceTile. 

    CGRect destTile;

    // the ratio of the size of the input image to the output image.

    float imageScale;

    // source image width and height

    CGSize sourceResolution;

    // total number of pixels in the source image

    float sourceTotalPixels;

    // total number of megabytes of uncompressed pixel data in the source image.

    float sourceTotalMB;

    // output image width and height

    CGSize destResolution;

    // the temporary container used to hold the resulting output image pixel 

    // data, as it is being assembled.

    CGContextRef destContext;

    // the number of pixels to overlap tiles as they are assembled.

    float sourceSeemOverlap;

    // an image view to visualize the image as it is being pieced together

    UIImageView* progressView;

    // a scroll view to display the resulting downsized image

    ImageScrollView* scrollView;

}

// destImage property is specifically thread safe (i.e. no 'nonatomic' attribute) 

// because it is accessed off the main thread.

@property (retain) UIImage* destImage; 

-(void)downsize:(id)arg;

-(void)updateScrollView:(id)arg;

-(void)initializeScrollView:(id)arg;

-(void)createImageFromContext;

@end