bzr branch
http://9ix.org/bzr/ld27
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35
by Josh C
cluke009 zoetrope + my spritebatch changes |
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-- Class: DebugPerformance |
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-- Shows a live graph of frames per second. This only records data while visible. |
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DebugPerformance = DebugInstrument:extend |
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{
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width = 'narrow', |
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contentHeight = 30, |
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samples = {},
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sampleInterval = 0.25, |
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samplePtr = 1, |
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numSamples = 100, |
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_sampleTimer = 0, |
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average = '-', |
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onNew = function (self) |
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self.bars = self:add(Group:new()) |
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end, |
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onUpdate = function (self, elapsed) |
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self._sampleTimer = self._sampleTimer + elapsed |
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local fps = math.floor(1 / elapsed + 0.5) |
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self.title.text = 'FPS (' .. fps .. ', average ' .. self.average .. ')'
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if self._sampleTimer > self.sampleInterval then |
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-- record fps and percent of desired fps |
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table.insert(self.samples, fps) |
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table.insert(self.samples, fps / the.app.fps) |
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if #self.samples > self.numSamples * 2 then |
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table.remove(self.samples, 1) |
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table.remove(self.samples, 1) |
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end |
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-- calculate average |
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local sum = 0 |
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for i = 1, #self.samples, 2 do |
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sum = sum + self.samples[i] |
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end |
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self.average = math.floor(sum / #self.samples * 2 + 0.5) |
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-- sync bars and title bar |
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local barHeight = self.contentHeight - 2 * self.spacing |
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for i, bar in ipairs(self._sampleBars) do |
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local percent = self.samples[i * 2] |
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if percent then |
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bar.distort.y = percent |
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if percent > 0.5 then |
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-- blend yellow to green |
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bar.fill = {255 * (1 - (percent / 2)), 255, 0}
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else |
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-- blend red to yellow |
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-- 510 * percent = 255 * percent / 2 |
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bar.fill = {255, 510 * percent, 0}
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end |
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else |
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bar.distort.y = 0 |
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end |
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end |
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self._sampleTimer = 0 |
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end |
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end, |
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onResize = function (self, x, y, width, height) |
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local oldSamples = self.numSamples |
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self.y = y + self.spacing |
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x = x + self.spacing |
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self.numSamples = math.floor(width - 2 * self.spacing) / 2 |
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if self.numSamples ~= oldSamples then |
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self._sampleBars = {}
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while #self.bars.sprites > 0 do |
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self.bars:remove(self.bars.sprites[1]) |
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end |
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for i = 1, self.numSamples do |
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self._sampleBars[i] = self.bars:add(Fill:new |
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{
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x = x, |
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y = self.y, |
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width = 2, |
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height = height - self.spacing * 2, |
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origin = { y = height - self.spacing * 2 },
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distort = { x = 1, y = 0 },
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fill = {255, 255, 255},
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}) |
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x = x + 2 |
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end |
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end |
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end |
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} |