LÖVE

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local framerateGraph = {}
framerateGraph.show = false
framerateGraph.showKey = '`'
framerateGraph.showKeyMod = {'lshift', 'rshift'}
framerateGraph.relativeKey = '1'
framerateGraph.relativeKeyMod = {'lshift','rshift'}
framerateGraph.relativeMode = true
framerateGraph.maxSamples = 500
framerateGraph.height = 100

framerateGraph.dtBuffer = {}
framerateGraph.frameMesh = nil

function framerateGraph.load(c0, c1)
	c0, c1 = c0 or {255,255,255,255}, c1 or {100,100,100,255}
	framerateGraph.frameMesh = love.graphics.newMesh({
		{0,0, 0,0, c0[1],c0[2],c0[3],c0[4]},
		{1,0, 0,0, c0[1],c0[2],c0[3],c0[4]},
		{0,1, 0,0, c1[1],c1[2],c1[3],c1[4]},
		{1,1, 0,0, c1[1],c1[2],c1[3],c1[4]}
	}, "strip", "static")
end

function framerateGraph.keypressed(key)
	if key == framerateGraph.showKey and love.keyboard.isDown(unpack(framerateGraph.showKeyMod)) then
		framerateGraph.show = not framerateGraph.show
		return true
	end
	if key == framerateGraph.relativeKey and love.keyboard.isDown(unpack(framerateGraph.relativeKeyMod)) and framerateGraph.show then
		framerateGraph.relativeMode = not framerateGraph.relativeMode
		return true
	end
	return false
end

function framerateGraph.draw()
	table.insert(framerateGraph.dtBuffer, love.timer.getDelta())
	if #framerateGraph.dtBuffer > framerateGraph.maxSamples then
		table.remove(framerateGraph.dtBuffer, 1)
	end

	if framerateGraph.show then
		local dtMax = 0
		local dtMin = math.huge
		local dtAvg = 0
		local dtVariance = 0
		local numSamples = #framerateGraph.dtBuffer
		for i, v in pairs(framerateGraph.dtBuffer) do 
			dtMax = math.max(dtMax, v) 
			dtMin = math.min(dtMin, v)
			dtAvg = dtAvg + v
		end
		dtAvg = dtAvg / numSamples

		for i, v in pairs(framerateGraph.dtBuffer) do
			dtVariance = dtVariance + ((v - dtAvg) ^ 2)
		end
		dtVariance = dtVariance / numSamples

		local screenWidth = love.graphics.getWidth()
		local graphX = 0
		local graphY = 6
		local graphWidth = screenWidth - 100
		local barSpacing = graphWidth / numSamples
		local barWidth = barSpacing
		local graphHeight = framerateGraph.height

		for i, v in pairs(framerateGraph.dtBuffer) do
			local h = (v / dtMax) * graphHeight
			if framerateGraph.relativeMode then
				h = ((v - dtMin) / (dtMax - dtMin)) * graphHeight
			end
			local x = graphX + ((i - 1) * barSpacing)
			local y = graphY + graphHeight - h

			love.graphics.setColor(255, 255, 255, 255)
			love.graphics.draw(framerateGraph.frameMesh, x, y, 0, barWidth, h)
		end
		love.graphics.print(string.format("%.2f ms max", dtMax * 1000), graphX + graphWidth + 6, graphY - 6)
		love.graphics.print(string.format("%.2f ms min", dtMin * 1000), graphX + graphWidth + 6, graphY + graphHeight - 6)

		love.graphics.setColor(50, 220, 50, 255)
		love.graphics.line(graphX, graphY + graphHeight, graphX + graphWidth, graphY + graphHeight)

		local x = graphX
		for i = 1, 20 do
			love.graphics.line(x, graphY, x + (graphWidth / 40), graphY)
			x = x + (graphWidth / 20)
		end

		local avgHeight = (dtAvg / dtMax) * graphHeight
		if framerateGraph.relativeMode then
			avgHeight = (((dtAvg - dtMin) / (dtMax - dtMin)) * graphHeight)
		end
		local avgLineY = graphY + graphHeight - avgHeight

		love.graphics.setColor(220, 150, 10, 255)
		love.graphics.line(graphX, avgLineY, graphX + graphWidth, avgLineY)
		love.graphics.print(string.format("%.2f ms avg", dtAvg * 1000), graphX + graphWidth + 6, avgLineY - 6)

		if dtVariance * 1000 > 0.1 then
			love.graphics.setColor(255, 50, 50, 255)
		else
			love.graphics.setColor(200, 200, 200, 255)
		end
		love.graphics.print(string.format("%.2f ms std. dev.", dtVariance * 1000), graphX + 6, graphY + graphHeight + 2)

		love.graphics.setColor(255, 255, 255, 255)
	end
end


return framerateGraph

Code: Select all

local framerateGraph = require("framerateGraph")

function love.load()
    framerateGraph.load()
    --your stuff here
end

function love.draw()
    framerateGraph.draw()
end

function love.keypressed(key, ...)
    if framerateGraph.keypressed(key) then
        return
    end
    --your stuff here; framerateGraph will only eat input if it's a key that is relevant to it so make sure you put your own code AFTER that
end