pixie/tests/benchmark_png.nim

import benchy, cairo, nimPNG, pixie/fileformats/png, stb_image/read as stbi,
    stb_image/write as stbr

let
  filePath = "tests/fileformats/png/lenna.png"
  data = readFile(filePath)

block:
  let
    decodedPng = decodePng(data)
    decodedImage = newImage(decodedPng)

  timeIt "pixie decode":
    discard decodePng(data)

  timeIt "pixie encode":
    discard encodePng(decodedPng)

  timeIt "pixie decode + alpha":
    discard newImage(decodePng(data))

  timeIt "pixie encode + alpha":
    discard encodePng(decodedImage)

block:
  timeIt "nimPNG decode":
    discard decodePNG32(data)

  let decoded = decodePNG32(data)
  timeIt "nimPNG encode":
    discard encodePNG32(decoded.data, decoded.width, decoded.height)

block:
  timeIt "stb_image decode":
    var width, height, channels: int
    discard loadFromMemory(
      cast[seq[byte]](data),
      width,
      height,
      channels,
      stbi.RGBA
    )

  var width, height, channels: int
  let decoded = loadFromMemory(
    cast[seq[byte]](data),
    width,
    height,
    channels,
    stbi.RGBA
  )

  timeIt "stb_image encode":
    discard writePNG(width, height, channels, decoded).len

block:
  timeIt "cairo decode":
    discard imageSurfaceCreateFromPng(filePath)

  let decoded = imageSurfaceCreateFromPng(filePath)
  timeIt "cairo encode":
    var write: WriteFunc =
      proc(closure: pointer, data: cstring, len: int32): Status {.cdecl.} =
        StatusSuccess
    discard decoded.writeToPng(write, nil)