/*

    File: ImageUtils.h

Abstract: Contains the core functionality of the sample.

 Version: 1.2

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*/

//  IICreateImage loads and creates the ImageInfo struct that is core to the sample

//  IISaveImage saves the transformed image to a PNG.

//  IIApplyTransformation shows how to rotate about center, scale, and translate the image

//  IIDrawImage draws the image into the given context

//  IIDrawImageTransformed calls IIApplyTransformation and IIDrawImage to do both at once while preserving the original context's CTM

//  IIRelease releases the ImageInfo struct allocated by IICreateImage

#include <ApplicationServices/ApplicationServices.h>

#ifdef __cplusplus

extern "C" {

#endif

struct ImageInfo

{

    CGFloat rotation;           // The rotation about the center of the image (degrees)

    CGFloat scaleX;             // The scaling of the image along it's X-axis

    CGFloat scaleY;             // The scaling of the image along it's Y-axis

    CGFloat translateX;         // Move the image along the X-axis

    CGFloat translateY;         // Move the image along the Y-axis

    CGImageRef image;           // The image itself

    CFDictionaryRef properties; // Image properties

};

typedef struct ImageInfo ImageInfo;

// Create a new image from a file at the given url

// Returns NULL if unsuccessful.

ImageInfo * IICreateImage(CFURLRef url);

// Save the given image to a file at the given url with the given size.

// Returns true if successful, false otherwise.

bool IISaveImage(ImageInfo * image, CFURLRef url, size_t width, size_t height);

// Draw the image to the given context centered inside the given bounds

void IIDrawImage(ImageInfo * image, CGContextRef context, CGRect bounds);

// Applies the transformations specified in the ImageInfo struct without drawing the actual image

void IIApplyTransformation(ImageInfo * image, CGContextRef context, CGRect bounds);

// Draw the image to the given context centered inside the given bounds with

// the transformation info. The CTM of the context is unchanged after this call

void IIDrawImageTransformed(ImageInfo * image, CGContextRef context, CGRect bounds);

// Release the ImageInfo struct and other associated data

// you should not refer to the reference after this call

void IIRelease(ImageInfo * image);

#ifdef __cplusplus

}

#endif