add natural size for original image

[ArcRain]

When we load one thumbnail for image, we want to know the original image size same time. I found the 2nd param in callback get image extra info. So I add a new property in default object.

[blueimp]

Thanks for your contribution, @ArcRain

The loadImage function returns the original image (see API doc), which you can use to retrieve any HTMLImageElement property:

var loadingImage = loadImage(
  'https://blueimp.github.io/Gallery/img/loading.gif',
  function callback (img) {
    console.log(loadingImage.naturalWidth, loadingImage.naturalHeight)
  },
  { maxWidth: 100, canvas: true }
)

Do you have any use case that cannot make use of that return value?

[ArcRain]

I haven’t noticed the return value. You’re right, it’s a good way to retrieve img property. I just think we can get more about original image info from result in callback function.

[blueimp]

Ok, unless you have a solid use case that prevents you from using the return value, I'd prefer to not merge this pull request. Thanks for your understanding.

[ArcRain]

That's OK. Thanks for your reply. :-)

[blueimp]

btw. if you definitely want to have the natural image properties in the callback, you can wrap the function like this:

function customLoadImage(file, callback, options) {
  var loadingImage = loadImage(
    file,
    function customCallback (img, data) {
      data = data || {}
      data.naturalWidth = loadingImage.naturalWidth
      data.naturalHeight = loadingImage.naturalHeight
      callback(img, data)
    },
    options
  )
  return loadingImage
}