-?(UIImage*)fixOrientation:(UIImage*)aImage?{

//?No-op?if?the?orientation?is?already?correct

if(aImage.imageOrientation==?UIImageOrientationUp)

returnaImage;

//?We?need?to?calculate?the?proper?transformation?to?make?the?image?upright.

//?We?do?it?in?2?steps:?Rotate?if?Left/Right/Down,?and?then?flip?if?Mirrored.

CGAffineTransform?transform?=?CGAffineTransformIdentity;

switch(aImage.imageOrientation)?{

caseUIImageOrientationDown:

caseUIImageOrientationDownMirrored:

transform?=?CGAffineTransformTranslate(transform,?aImage.size.width,?aImage.size.height);

transform?=?CGAffineTransformRotate(transform,?M_PI);

break;

caseUIImageOrientationLeft:

caseUIImageOrientationLeftMirrored:

transform?=?CGAffineTransformTranslate(transform,?aImage.size.width,0);

transform?=?CGAffineTransformRotate(transform,?M_PI_2);

break;

caseUIImageOrientationRight:

caseUIImageOrientationRightMirrored:

transform?=?CGAffineTransformTranslate(transform,0,?aImage.size.height);

transform?=?CGAffineTransformRotate(transform,?-M_PI_2);

break;

default:

break;

}

switch(aImage.imageOrientation)?{

caseUIImageOrientationUpMirrored:

caseUIImageOrientationDownMirrored:

transform?=?CGAffineTransformTranslate(transform,?aImage.size.width,0);

transform?=?CGAffineTransformScale(transform,?-1,1);

break;

caseUIImageOrientationLeftMirrored:

caseUIImageOrientationRightMirrored:

transform?=?CGAffineTransformTranslate(transform,?aImage.size.height,0);

transform?=?CGAffineTransformScale(transform,?-1,1);

break;

default:

break;

}

//?Now?we?draw?the?underlying?CGImage?into?a?new?context,?applying?the?transform

//?calculated?above.

CGContextRef?ctx?=?CGBitmapContextCreate(NULL,?aImage.size.width,?aImage.size.height,

CGImageGetBitsPerComponent(aImage.CGImage),0,

CGImageGetColorSpace(aImage.CGImage),

CGImageGetBitmapInfo(aImage.CGImage));

CGContextConcatCTM(ctx,?transform);

switch(aImage.imageOrientation)?{

caseUIImageOrientationLeft:

caseUIImageOrientationLeftMirrored:

caseUIImageOrientationRight:

caseUIImageOrientationRightMirrored:

//?Grr...

CGContextDrawImage(ctx,?CGRectMake(0,0,aImage.size.height,aImage.size.width),?aImage.CGImage);

break;

default:

CGContextDrawImage(ctx,?CGRectMake(0,0,aImage.size.width,aImage.size.height),?aImage.CGImage);

break;

}

//?And?now?we?just?create?a?new?UIImage?from?the?drawing?context

CGImageRef?cgimg?=?CGBitmapContextCreateImage(ctx);

UIImage*img?=?[UIImageimageWithCGImage:cgimg];

CGContextRelease(ctx);

CGImageRelease(cgimg);

returnimg;

}