source: extensions/piwigo_mobile/ios/Piwigo/Plugins/cameraExtended.m @ 12411

/*
 * PhoneGap is available under *either* the terms of the modified BSD license *or* the
 * MIT License (2008). See http://opensource.org/licenses/alphabetical for full text.
 * 
 * Copyright (c) 2005-2010, Nitobi Software Inc.
 * Copyright (c) 2011, IBM Corporation
 * Copyright (c) 2011, Ambrose Software, Inc
 *
 */

#import "cameraExtended.h"

@implementation PGCameraExtended


- (UIImage*)imageByScalingAndCroppingForSize:(UIImage*)anImage toSize:(CGSize)targetSize
{
    UIImage *sourceImage = anImage;
    UIImage *newImage = nil;        
    CGSize imageSize = sourceImage.size;
    CGFloat width = imageSize.width;
    CGFloat height = imageSize.height;
    CGFloat targetWidth = targetSize.width;
    CGFloat targetHeight = targetSize.height;
    CGFloat scaledWidth = targetWidth;
    CGFloat scaledHeight = targetHeight;
  
    CGFloat ratio_width  = width / targetWidth;
    CGFloat ratio_height = height / targetHeight;
  
    // maximal size exceeded ?
    if (ratio_width > 1 || ratio_height > 1)
    {
      if (ratio_width < ratio_height)
      { 
        scaledWidth = ceil(width / ratio_height);
      }
      else
      { 
        scaledHeight = ceil(height / ratio_width);
      }

      targetSize = CGSizeMake(scaledWidth, scaledHeight);
      self.pickerController.targetSize = targetSize;
    }
    else
    {
      return sourceImage;
    }
    
    UIGraphicsBeginImageContext(targetSize);
    
    CGRect thumbnailRect = CGRectZero;
    thumbnailRect.size.width  = scaledWidth;
    thumbnailRect.size.height = scaledHeight;
    
    [sourceImage drawInRect:thumbnailRect];
    
    newImage = UIGraphicsGetImageFromCurrentImageContext();
    if(newImage == nil) 
        NSLog(@"could not scale image");
    
    //pop the context to get back to the default
    UIGraphicsEndImageContext();
    return newImage;
}


@end