pixie/tests/test_fonts.nim

import pixie, pixie/fileformats/png, strformat

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 64
  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.fillText(font, "fill", rgba(0, 0, 0, 255))
  image.writeFile("tests/fonts/image_fill.png")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 64
  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.strokeText(font, "stroke", rgba(0, 0, 0, 255))
  image.writeFile("tests/fonts/image_stroke.png")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 64
  let mask = newMask(200, 100)
  mask.fillText(font, "fill")
  writeFile("tests/fonts/mask_fill.png", mask.encodePng())

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 64
  let mask = newMask(200, 100)
  mask.strokeText(font, "stroke")
  writeFile("tests/fonts/mask_stroke.png", mask.encodePng())

block:
  let font = readFont("tests/fonts/Changa-Bold.svg")
  font.size = 48
  let mask = newMask(200, 100)
  mask.fillText(font, "Changa")
  writeFile("tests/fonts/svg_changa.png", mask.encodePng())

block:
  let font = readFont("tests/fonts/DejaVuSans.svg")
  font.size = 48
  let mask = newMask(200, 100)
  mask.fillText(font, "Deja vu ")
  writeFile("tests/fonts/svg_dejavu.png", mask.encodePng())

block:
  let font = readFont("tests/fonts/IBMPlexSans-Regular.svg")
  font.size = 48
  let mask = newMask(200, 100)
  mask.fillText(font, "IBM ")
  writeFile("tests/fonts/svg_ibm.png", mask.encodePng())

block:
  let font = readFont("tests/fonts/Moon-Bold.svg")
  font.size = 48
  let mask = newMask(200, 100)
  mask.fillText(font, "Moon ")
  writeFile("tests/fonts/svg_moon.png", mask.encodePng())

block:
  let font = readFont("tests/fonts/Ubuntu.svg")
  font.size = 48
  let mask = newMask(200, 100)
  mask.fillText(font, "Ubuntu ")
  writeFile("tests/fonts/svg_ubuntu.png", mask.encodePng())

proc doDiff(rendered: Image, name: string) =
  let
    master = readImage(&"tests/fonts/masters/{name}.png")
    (_, diffImage) = diff(master, rendered)
  rendered.writeFile(&"tests/fonts/rendered/{name}.png")
  diffImage.writeFile(&"tests/fonts/diffs/{name}.png")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 72

  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.fillText(font, "asdf", rgba(0, 0, 0, 255))

  doDiff(image, "basic1")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 72

  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.fillText(font, "A cow", rgba(0, 0, 0, 255))

  doDiff(image, "basic2")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 24

  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.fillText(font, "A bit of text HERE", rgba(0, 0, 0, 255))

  doDiff(image, "basic3")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 24
  font.lineHeight = 100

  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.fillText(font, "Line height", rgba(0, 0, 0, 255))

  doDiff(image, "basic4")

block:
  let font = readFont("tests/fonts/Ubuntu-Regular.ttf")
  font.size = 24

  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.fillText(font, "Another font", rgba(0, 0, 0, 255))

  doDiff(image, "basic5")

block:
  let font = readFont("tests/fonts/Aclonica-Regular.ttf")
  font.size = 24

  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.fillText(font, "Different font", rgba(0, 0, 0, 255))

  doDiff(image, "basic6")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 24

  let image = newImage(200, 100)
  image.fill(rgba(255, 255, 255, 255))
  image.fillText(
    font,
    "First line",
    rgba(0, 0, 0, 255)
  )
  image.fillText(
    font,
    "Second line",
    rgba(0, 0, 0, 255),
    vec2(0, font.defaultLineHeight)
  )

  doDiff(image, "basic7")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 24

  let
    image = newImage(200, 100)
    layout = font.typeset(
      "Wrapping text to new line",
      bounds = vec2(200, 0)
    )

  image.fill(rgba(255, 255, 255, 255))

  for path in layout:
    image.fillPath(path, rgba(0, 0, 0, 255))

  doDiff(image, "basic8")

block:
  let font = readFont("tests/fonts/Roboto-Regular.ttf")
  font.size = 24

  let
    image = newImage(200, 100)
    layout = font.typeset(
      "Supercalifragilisticexpialidocious",
      bounds = vec2(200, 0)
    )

  image.fill(rgba(255, 255, 255, 255))

  for path in layout:
    image.fillPath(path, rgba(0, 0, 0, 255))

  doDiff(image, "basic9")