pixie/tests/test_bmp.nim

import pixie, pixie/fileformats/bmp, chroma

block:
  var image = newImage(4, 2)

  image[0, 0] = rgba(0, 0, 255, 255)
  image[1, 0] = rgba(0, 255, 0, 255)
  image[2, 0] = rgba(255, 0, 0, 255)
  image[3, 0] = rgba(255, 255, 255, 255)

  image[0, 1] = rgba(0, 0, 255, 127)
  image[1, 1] = rgba(0, 255, 0, 127)
  image[2, 1] = rgba(255, 0, 0, 127)
  image[3, 1] = rgba(255, 255, 255, 127)

  writeFile("tests/images/bmp/test4x2.bmp", encodeBmp(image))

  var image2 = decodeBmp(encodeBmp(image))
  doAssert image2.width == image.width
  doAssert image2.height == image.height
  doAssert image2.data == image.data

block:
  var image = newImage(16, 16)
  image.fill(rgba(255, 0, 0, 127))
  writeFile("tests/images/bmp/test16x16.bmp", encodeBmp(image))

  var image2 = decodeBmp(encodeBmp(image))
  doAssert image2.width == image.width
  doAssert image2.height == image.height
  doAssert image2.data == image.data

block:
  for bits in [32, 24]:
    var image = decodeBmp(readFile("tests/images/bmp/knight." & $bits & ".master.bmp"))
    writeFile("tests/images/bmp/knight." & $bits & ".bmp", encodeBmp(image))