Small images are stretched for the entire width of the document

[ivanjaros]

I have a testing document which contains a small image of 176px*176px dimensions. The problem is that this image will be scaled to the entire width of the document, which does not look good and is most likely not desired because it would not be rendered as such in HTML document, unless specifically configured with CSS.

The code responsible for this behavior is: https://github.com/stephenafamo/goldmark-pdf/blob/master/renderer_funcs.go#L581

I think that if the image is smaller than the width of the document, it should be kept as is and if the image is wider, only then it should be scaled down to fit the document.