pixie/tests/test_paths.nim

import pixie, chroma, pixie/fileformats/png

block:
  let pathStr = """
  m 1 2 3 4 5 6
  """
  let path = parsePath(pathStr)
  doAssert $path == "m1 2 m3 4 m5 6"

block:
  let pathStr = """
    m 1 2
    l 3 4
    h 5
    v 6
    c 0 0 0 0 0 0
    q 1 1 1 1
    t 2 2
    a 7 7 7 7 7 7 7
    z
  """
  let path = parsePath(pathStr)
  doAssert $path == "m1 2 l3 4 h5 v6 c0 0 0 0 0 0 q1 1 1 1 t2 2 a7 7 7 7 7 7 7 Z"

block:
  let pathStr = """
    M 1 2
    L 3 4
    H 5
    V 6
    C 0 0 0 0 0 0
    Q 1 1 1 1
    T 2 2
    A 7 7 7 7 7 7 7
    z
  """
  let path = parsePath(pathStr)
  doAssert $path == "M1 2 L3 4 H5 V6 C0 0 0 0 0 0 Q1 1 1 1 T2 2 A7 7 7 7 7 7 7 Z"

block:
  let
    pathStr = "M 0.1E-10 0.1e10 L2+2 L3-3 L0.1E+10-1"
    path = parsePath(pathStr)

block:
  let
    image = newImage(100, 100)
    pathStr = "M 10 10 L 90 90"
    color = rgba(255, 0, 0, 255)
  image.strokePath(pathStr, color, 10)
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathStroke1.png")

block:
  let
    image = newImage(100, 100)
    pathStr = "M 10 10 L 50 60 90 90"
    color = rgba(255, 0, 0, 255)
  image.strokePath(pathStr, color, 10)
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathStroke2.png")

block:
  let image = newImage(100, 100)
  image.strokePath(
    "M 15 10 L 30 90 60 30 90 90",
    rgba(255, 255, 0, 255),
    strokeWidth = 10
  )
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathStroke3.png")

block:
  let
    image = newImage(100, 100)
    pathStr = "M 10 10 H 90 V 90 H 10 L 10 10"
    color = rgba(0, 0, 0, 255)
  image.fillPath(pathStr, color)
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathBlackRectangle.png")

block:
  let
    image = newImage(100, 100)
    pathStr = "M 10 10 H 90 V 90 H 10 Z"
    color = rgba(0, 0, 0, 255)
  image.fillPath(parsePath(pathStr), color)
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathBlackRectangleZ.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M 10 10 H 90 V 90 H 10 L 10 10",
    rgba(255, 255, 0, 255)
  )
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathYellowRectangle.png")

block:
  var path: Path
  path.moveTo(10, 10)
  path.lineTo(10, 90)
  path.lineTo(90, 90)
  path.lineTo(90, 10)
  path.lineTo(10, 10)

  let image = newImage(100, 100)
  image.fillPath(path, rgba(255, 0, 0, 255))
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathRedRectangle.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M30 60 A 20 20 0 0 0 90 60 L 30 60",
    parseHtmlColor("#FC427B").rgba
  )
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathBottomArc.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    """
      M 10,30
      A 20,20 0,0,1 50,30
      A 20,20 0,0,1 90,30
      Q 90,60 50,90
      Q 10,60 10,30 z
    """,
    parseHtmlColor("#FC427B").rgba
  )
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathHeart.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M 20 50 A 20 10 45 1 1 80 50 L 20 50",
    parseHtmlColor("#FC427B").rgba
  )
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathRotatedArc.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M 0 50 A 50 50 0 0 0 50 0 L 50 50 L 0 50",
    parseHtmlColor("#FC427B").rgba
  )
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathInvertedCornerArc.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M 0 50 A 50 50 0 0 1 50 0 L 50 50 L 0 50",
    parseHtmlColor("#FC427B").rgba
  )
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathCornerArc.png")

block:
  let
    image = newImage(100, 100)
    r = 10.0
    x = 10.0
    y = 10.0
    h = 80.0
    w = 80.0
  var path: Path
  path.moveTo(x + r, y)
  path.arcTo(x + w, y, x + w, y + h, r)
  path.arcTo(x + w, y + h, x, y + h, r)
  path.arcTo(x, y + h, x, y, r)
  path.arcTo(x, y, x + w, y, r)
  image.fillPath(path, rgba(255, 0, 0, 255))
  image.toStraightAlpha()
  image.writeFile("tests/images/paths/pathRoundRect.png")

block:
  let
    mask = newMask(100, 100)
    pathStr = "M 10 10 H 90 V 90 H 10 L 10 10"
  mask.fillPath(pathStr)
  writeFile("tests/images/paths/pathRectangleMask.png", mask.encodePng())

block:
  let
    mask = newMask(100, 100)
    r = 10.0
    x = 10.0
    y = 10.0
    h = 80.0
    w = 80.0
  var path: Path
  path.moveTo(x + r, y)
  path.arcTo(x + w, y, x + w, y + h, r)
  path.arcTo(x + w, y + h, x, y + h, r)
  path.arcTo(x, y + h, x, y, r)
  path.arcTo(x, y, x + w, y, r)
  mask.fillPath(path)
  writeFile("tests/images/paths/pathRoundRectMask.png", mask.encodePng())