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Date: Fri, 9 Mar 2012 14:10:58 +0000 (UTC)
From: "Volker Schuchardt (Commented) (JIRA)" <jira@apache.org>
To: callback-dev@incubator.apache.org
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Subject: [jira] [Commented] (CB-183) ios camera targetWidth/Height don't
 match the documentation
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    [ https://issues.apache.org/jira/browse/CB-183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226086#comment-13226086 ] 

Volker Schuchardt commented on CB-183:
--------------------------------------

Hi Shazron Abdullah,

I found the same issue in version 1.4. Therefore I changed the code to match the aspect ratio as follows in file 'Camera.m':

(UIImage*)imageByScalingAndCroppingForSize:(UIImage*)anImage toSize:(CGSize)targetSize
{
    ...
//Added the following line to save the resized messures at a later point.
    CGSize scaledSize = CGSizeMake(0, 0); 
    CGPoint thumbnailPoint = CGPointMake(0.0,0.0);
    
    if (CGSizeEqualToSize(imageSize, targetSize) == NO) 
    {
        CGFloat widthFactor = targetWidth / width;
        CGFloat heightFactor = targetHeight / height;

        if (widthFactor > heightFactor) 
//here the value was widthFactor but has to be heightFactor. So I changed it.
            scaleFactor = heightFactor; // scale to fit height
        else
//Here the value was heightFactor but has to be widthFactor. So I changed it.
            scaleFactor = widthFactor; // scale to fit width

        scaledWidth  = width * scaleFactor;
        scaledHeight = height * scaleFactor;
//This line was added to save the new width and height values.
        scaledSize = CGSizeMake(scaledWidth, scaledHeight); 
		
        // center the image
        if (widthFactor > heightFactor)
        {
            thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5; 
        }
        else 
            if (widthFactor < heightFactor)
            {
                thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
            }
    }       

//This line was added to replace the one below. There we won't crop the picture, but just resize it to the new calculated values.
    UIGraphicsBeginImageContext(scaledSize);
//    UIGraphicsBeginImageContext(targetSize); // this will crop
    
    ...
}

Hope it helps.
Best regards,
Volker
                
> ios camera targetWidth/Height don't match the documentation
> -----------------------------------------------------------
>
>                 Key: CB-183
>                 URL: https://issues.apache.org/jira/browse/CB-183
>             Project: Apache Callback
>          Issue Type: Bug
>          Components: iOS
>    Affects Versions: 1.0.0
>            Reporter: Durham
>            Assignee: Shazron Abdullah
>             Fix For: 1.6.0
>
>
> According to the [phonegap camera documentation|http://docs.phonegap.com/en/1.3.0/phonegap_camera_camera.md.html#cameraOptions] using targetWidth and targetHeight should maintain the aspect ratio of the original photo . The ios implementation does not do this. Instead it makes the shortest side match the desired target, and crops the rest.
> For example, if I take a 1920x1200 picture, and say targetWidth=1024 and targetHeight=1024, it results in a 1024x1024 square picture with the excess removed. On android it results in something like 1024x640, and nothing is cropped.
> I'm don't know objective-c, but I believe the fix is to use the following code inside Camera.m imageByScalingAndCroppingForSize. This is based off the android implementation.
> {code:title=Camera.m}
> ...
> if (CGSizeEqualToSize(imageSize, targetSize) == NO) 
> {
>     CGFloat newRatio = targetWidth / targetHeight;
>     CGFloat origRatio = width / height;
>     if (origRatio > newRatio) 
>     {
>         targetHeight = (targetWidth * height) / width
>     } 
>     else 
>     {
>         targetWidth = (targetHeight * width) / height;
>     }
> }
> CGSize finalSize = CGSizeMake(targetWidth, targetHeight);
> UIGraphicsBeginImageContext(finalSize);
> CGRect thumbnailRect = CGRectZero;
> thumbnailRect.size.width  = targetWidth;
> thumbnailRect.size.height = targetHeight;
> [sourceImage drawInRect:thumbnailRect];
> ...
> {code}
> I'm currently seeing the problem in 1.0, but from looking at the code it still looks like a problem in 1.3.

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