blob: 4eac7b913d5eb99e4dea1f8ab1eb346575b0a498 [file] [log] [blame]
--[[
UNLICENSE
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]]
-- Code based on https://github.com/icrawler/FPSGraph
local debugGraph = {}
function debugGraph:new(type, x, y, width, height, delay, label, font)
if ({mem=0, fps=0, custom=0})[type] == nil then
error('Acceptable types: mem, fps, custom')
end
local instance = {
x = x or 0, -- X position
y = y or 0, -- Y position
width = width or 50, -- Graph width
height = height or 30, -- Graph height
delay = delay or 0.5, -- Update delay
label = label or type, -- Graph label
font = font or love.graphics.newFont(8),
data = {},
_max = 0,
_time = 0,
_type = type,
}
-- Build base data
for i = 0, math.floor(instance.width / 2) do
table.insert(instance.data, 0)
end
-- Updating the graph
function instance:update(dt, val)
local lastTime = self._time
self._time = (self._time + dt) % self.delay
-- Check if the minimum amount of time has past
if dt > self.delay or lastTime > self._time then
-- Fetch data if needed
if val == nil then
if self._type == 'fps' then
-- Collect fps info and update the label
val = 0.75 * 1 / dt + 0.25 * love.timer.getFPS()
self.label = "FPS: " .. math.floor(val * 10) / 10
elseif self._type == 'mem' then
-- Collect memory info and update the label
val = collectgarbage('count')
self.label = "Memory (KB): " .. math.floor(val * 10) / 10
else
-- If the val is nil then we'll just skip this time
return
end
end
-- pop the old data and push new data
table.remove(self.data, 1)
table.insert(self.data, val)
-- Find the highest value
local max = 0
for i=1, #self.data do
local v = self.data[i]
if v > max then
max = v
end
end
self._max = max
end
end
function instance:draw()
-- Store the currently set font and change the font to our own
local fontCache = love.graphics.getFont()
love.graphics.setFont(self.font)
local max = math.ceil(self._max/10) * 10 + 20
local len = #self.data
local steps = self.width / len
-- Build the line data
local lineData = {}
for i=1, len do
-- Build the X and Y of the point
local x = steps * (i - 1) + self.x
local y = self.height * (-self.data[i] / max + 1) + self.y
-- Append it to the line
table.insert(lineData, x)
table.insert(lineData, y)
end
-- Draw the line
love.graphics.line(unpack(lineData))
-- Print the label
if self.label ~= '' then
love.graphics.print(self.label, self.x, self.y + self.height - self.font:getHeight())
end
-- Reset the font
love.graphics.setFont(fontCache)
end
return instance
end
return debugGraph