Question: How do I implement screen scaling in Love2D using the push library?

Answer

push is a simple library that allows for resolution-independent rendering in LÖVE games, also known as letterboxing. This can be very useful when you want your game to run at a fixed resolution regardless of the window size.

Here's how you can use the push library:

1. Download the push library: First, get the push.lua file from its GitHub repository or another source.

2. Include push in your project: Place the push.lua file in your project directory and require it in your main.lua.

local push = require 'push'

3. Initialize push: In your love.load() function, initialize push with your desired game resolution.

function love.load()
    local gameWidth, gameHeight = 800, 600 -- fixed game resolution
    local windowWidth, windowHeight = love.window.getDesktopDimensions()
    push:setupScreen(gameWidth, gameHeight, windowWidth, windowHeight, {fullscreen = false, resizable = true, pixelperfect = true})
end

4. Use push functions for drawing: Instead of using the regular LÖVE love.graphics calls for drawing on the screen, use push:start() and push:finish() before and after your drawing code.

function love.draw()
    push:start()
    -- Your drawing logic here.
    push:finish()
end

5. Resizing: Handle the window resizing by implementing the love.resize(w, h) callback and calling push:resize(w, h) within it to adjust the game's viewport correctly.

function love.resize(w, h)
    push:resize(w, h)
end

By following these steps, you'll have a basic setup that uses the push library to manage different screen resolutions and maintain consistent scaling and aspect ratio for your LÖVE games.