Any way to extend love objects? [Solved]

[mcjohnalds45]

Is there any way to add functions to love objects from within love2d without having to compile your own love2d?

E.g

Code: Select all

function love.Image:getSize()
	return self:getWidth(), self:getHeight()
end

hamster = love.graphics.newImage('hamster.png')

print(hamster:getSize()) -- Prints 128, 128

[slime]

Here is one way, but it's not particularly elegant:

Code: Select all

do
    local function getImageSize(image)
        return image:getWidth(), image:getHeight()
    end

    local _newImage = love.graphics.newImage
    function love.graphics.newImage(...)
        local img = _newImage(...)
        getmetatable(img).getSize = getImageSize

        love.graphics.newImage = _newImage
        return img
    end
end

myimage = love.graphics.newImage("hamster.png")
print(myimage:getSize())

Personally I'd recommend against messing with LÖVE's objects like that though. You can just use a getImageSize function to accomplish the same thing without modifying anything else.

[mcjohnalds45]

I just felt it made more sense to put functions like that into the only object it's going to be used on anyway. Thanks for that code though, I never think of doing that!

[kikito]

I have used metatables to do it in the past, but it was very implementation-dependent (could work on 0.8.x and fail in 0.9.x)