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[ralmeida]

IT WORKS

All above code with minimal tweaks:

...
#include <math.h>

static inline double radians (double degrees) {return degrees * M_PI/180;}
...


-(UIImage *)resizeImage:(UIImage *)image :(NSInteger) width :(NSInteger) height {
	
	CGImageRef imageRef = [image CGImage];
	CGImageAlphaInfo alphaInfo = CGImageGetAlphaInfo(imageRef);
	CGColorSpaceRef colorSpaceInfo = CGColorSpaceCreateDeviceRGB();
	
	if (alphaInfo == kCGImageAlphaNone)
		alphaInfo = kCGImageAlphaNoneSkipLast;
	
	CGContextRef bitmap;
	
	if (image.imageOrientation == UIImageOrientationUp || image.imageOrientation == UIImageOrientationDown) {
		bitmap = CGBitmapContextCreate(NULL, width, height, CGImageGetBitsPerComponent(imageRef), CGImageGetBytesPerRow(imageRef), colorSpaceInfo, alphaInfo);
		
	} else {
		bitmap = CGBitmapContextCreate(NULL, height, width, CGImageGetBitsPerComponent(imageRef), CGImageGetBytesPerRow(imageRef), colorSpaceInfo, alphaInfo);
		
	}
	
	if (image.imageOrientation == UIImageOrientationLeft) {
		NSLog(@"image orientation left");
		CGContextRotateCTM (bitmap, radians(90));
		CGContextTranslateCTM (bitmap, 0, -height);
		
	} else if (image.imageOrientation == UIImageOrientationRight) {
		NSLog(@"image orientation right");
		CGContextRotateCTM (bitmap, radians(-90));
		CGContextTranslateCTM (bitmap, -width, 0);
		
	} else if (image.imageOrientation == UIImageOrientationUp) {
		NSLog(@"image orientation up");	
		
	} else if (image.imageOrientation == UIImageOrientationDown) {
		NSLog(@"image orientation down");	
		CGContextTranslateCTM (bitmap, width,height);
		CGContextRotateCTM (bitmap, radians(-180.));
		
	}
	
	CGContextDrawImage(bitmap, CGRectMake(0, 0, width, height), imageRef);
	CGImageRef ref = CGBitmapContextCreateImage(bitmap);
	UIImage *result = [UIImage imageWithCGImage:ref];
	
	CGColorSpaceRelease(colorSpaceInfo);
	CGContextRelease(bitmap);
	CGImageRelease(ref);
	
	return result;	
}