identicon-0.2.2: bench/Main.hs

{-# LANGUAGE DataKinds         #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TypeOperators     #-}

module Main (main) where

import Codec.Picture
import Criterion.Main
import Data.ByteString (ByteString)
import Data.Proxy
import Data.Word (Word8)
import Graphics.Identicon
import Graphics.Identicon.Primitive
import System.Random
import System.Random.TF.Init
import qualified Data.ByteString as B

main :: IO ()
main = defaultMain
  [ bgen 0  0 gen0
  , bgen 4  1 gen1
  , bgen 8  2 gen2
  , bgen 12 3 gen3 ]

-- | Run an identicon benchmark given its name and rendering function.

bgen
  :: Int               -- ^ Number of bytes the generator expects
  -> Int               -- ^ Number of layers the generator has
  -> (Int -> Int -> ByteString -> Maybe (Image PixelRGB8)) -- ^ Generator
  -> Benchmark         -- ^ Benchmark
bgen bytes layers gen = bgroup groupName (f <$> testSizes)
  where
    groupName = show bytes ++ " bytes/" ++ show layers ++ " layers"
    f n       =
      let n' = show n
      in env (getBS bytes) (bench (n' ++ " × " ++ n') . nf (gen n n))

-- | Obtain a quite random 'ByteString' of specified length.

getBS :: Int -> IO ByteString
getBS n = do
  gen <- initTFGen
  (return . B.pack . take n . randoms) gen

-- | We render a series of rectangular icons in 'bgen', this list contains
-- size of a side of icon in pixels.

testSizes :: [Int]
testSizes = [16,32,64,128,256,512,1024]

----------------------------------------------------------------------------
-- Identicon generators

type Gen0 = Identicon 0

gen0 :: Int -> Int -> ByteString -> Maybe (Image PixelRGB8)
gen0 = renderIdenticon (Proxy :: Proxy Gen0) Identicon

type Gen1 = Identicon 4 :+ Consumer 4

gen1 :: Int -> Int -> ByteString -> Maybe (Image PixelRGB8)
gen1 = renderIdenticon (Proxy :: Proxy Gen1) i
  where
    i = Identicon :+ stdLayer

type Gen2 = Identicon 8 :+ Consumer 4 :+ Consumer 4

gen2 :: Int -> Int -> ByteString -> Maybe (Image PixelRGB8)
gen2 = renderIdenticon (Proxy :: Proxy Gen2) i
  where
    i = Identicon :+ stdLayer :+ stdLayer

type Gen3 = Identicon 12 :+ Consumer 4 :+ Consumer 4 :+ Consumer 4

gen3 :: Int -> Int -> ByteString -> Maybe (Image PixelRGB8)
gen3 = renderIdenticon (Proxy :: Proxy Gen3) i
  where
    i = Identicon :+ stdLayer :+ stdLayer :+ stdLayer

stdLayer :: Pixel8 -> Pixel8 -> Pixel8 -> Word8 -> Layer
stdLayer r g b n = rsym $ onGrid 4 4 n $
  circle $ gradientLR (edge . mid) black (PixelRGB8 r g b)