VMMagnifyComparer

A magnified comparison between two images.

Demo

As you can see, VMMagnifyComparerView is very useful if you want to compare two images in detail.

Of course, you can scroll with mouse or trackpad, to zoom in/out the magnified part.

Note: The mouse cursor is drawn only for this demo. If you run the example project by yourself, you wouldn't see the mouse cursor.

Setup

Copy files from VMMagnifyComparer folder to your own project.

APIs

VMMagnifyComparerView is essentially a NSImageView, so you can set current display image with setImage: call.

To set the image to compare with, use setDuelImage:.

To set the size of VMMagnifiyComparerView, use setMagnifierSizeRatio:. Note this ratio is calculated as smallerSideOf(imageView.frame) / smallerSizeOf(magnifier.frame), so it's greater or equal to 1.

Finally, you can set a border image with setSegImage:. Since the size of VMMagnifyComparerView varies with raw image size, you'd better use vector images here.

For more detail, please check the example project.

Update

• 2014.7.16 Add support for different imageScaling types in NSImage.

License

Check out LICENSE.