Wish for ability to use only a sub-part of an image.
http://stackoverflow.com/questions/10038148/
https://en.wikipedia.org/wiki/Sprite_%28computer_graphics%29#Sprites_by_CSS
Because sometimes your original image is composed.
Because it may load faster.
Because sometimes you just only want a part.
Syntax could be like :
{{:img.png?11,12:13x14}} Starting from column 11 & row 12, use 13×14 pixels.
{{:img.png?11,12:}} Starting from column 11 & row 12, use all till bottom-right corner (default).
{{:img.png?11,:}} Starting from column 11 & first row(default), use all till bottom-right corner.
{{:img.png?11,12:13,14}} From column 11 & row 12 to column 13 & row 14 included (hence dimension 2×2).
With same defaults as above.
{{:img.png?11,12:13,14&4x4}} Same as above, resized (if that is possible).