0.0.18 more paths.nim stuff

pixie.nimble

@@ -1,4 +1,4 @@
-version     = "0.0.17"
+version     = "0.0.18"
 author      = "Andre von Houck and Ryan Oldenburg"
 description = "Full-featured 2d graphics library for Nim."
 license     = "MIT"
@@ -11,4 +11,4 @@ requires "chroma >= 0.2.1"
 requires "zippy >= 0.3.5"
 requires "flatty >= 0.1.3"
 requires "nimsimd >= 0.4.6"
-requires "bumpy >= 1.0.0"
+requires "bumpy >= 1.0.1"

src/pixie/paths.nim

@@ -362,33 +362,32 @@ proc polygon*(path: var Path, x, y, size: float32, sides: int) =
       y + size * sin(side.float32 * 2.0 * PI / sides.float32)
     )
 
-proc commandsToPolygons*(commands: seq[PathCommand]): seq[seq[Vec2]] =
+proc commandsToShapes*(path: Path): seq[seq[Segment]] =
   ## Converts SVG-like commands to simpler polygon
 
-  var start, at, to, ctr, ctr2: Vec2
-  var prevCommand: PathCommandKind
+  var
+    start, at: Vec2
+    shape: seq[Segment]
 
-  var polygon: seq[Vec2]
+  # Some commands use data from the previous command
+  var
+    prevCommandKind = Move
+    prevCtrl, prevCtrl2: Vec2
 
-  proc drawLine(at, to: Vec2) =
-    # Don't add any 0 length lines.
-    if at - to != vec2(0, 0):
-      # Don't double up points.
-      if polygon.len == 0 or polygon[^1] != at:
-        polygon.add(at)
-      polygon.add(to)
+  const errorMargin = 0.2
 
-  proc drawCurve(at, ctrl1, ctrl2, to: Vec2) =
+  proc addCubic(shape: var seq[Segment], at, ctrl1, ctrl2, to: Vec2) =
 
     proc compute(at, ctrl1, ctrl2, to: Vec2, t: float32): Vec2 {.inline.} =
       pow(1 - t, 3) * at +
-      3 * pow(1 - t, 2) * t * ctrl1 +
-      3 * (1 - t) * pow(t, 2) * ctrl2 +
+      pow(1 - t, 2) * 3 * t * ctrl1 +
+      (1 - t) * 3 * pow(t, 2) * ctrl2 +
       pow(t, 3) * to
 
     var prev = at
 
-    proc discretize(i, steps: int) =
+    proc discretize(shape: var seq[Segment], i, steps: int) =
+      # Closure captures at, ctrl1, ctrl2, to and prev
       let
         tPrev = (i - 1).float32 / steps.float32
         t = i.float32 / steps.float32
@@ -397,37 +396,47 @@ proc commandsToPolygons*(commands: seq[PathCommand]): seq[seq[Vec2]] =
         midpoint = (prev + next) / 2
         error = (midpoint - halfway).length
 
-      if error >= 0.25:
+      if error >= errorMargin:
         # Error too large, double precision for this step
-        discretize(i * 2 - 1, steps * 2)
-        discretize(i * 2, steps * 2)
+        shape.discretize(i * 2 - 1, steps * 2)
+        shape.discretize(i * 2, steps * 2)
       else:
-        drawLine(prev, next)
+        shape.add(segment(prev, next))
         prev = next
 
-    discretize(1, 1)
+    shape.discretize(1, 1)
 
-  proc drawQuad(p0, p1, p2: Vec2) =
-    let devx = p0.x - 2.0 * p1.x + p2.x
-    let devy = p0.y - 2.0 * p1.y + p2.y
-    let devsq = devx * devx + devy * devy
-    if devsq < 0.333:
-      drawLine(p0, p2)
-      return
-    let tol = 3.0
-    let n = 1 + (tol * (devsq)).sqrt().sqrt().floor()
-    var p = p0
-    let nrecip = 1 / n
-    var t = 0.0
-    for i in 0 ..< int(n):
-      t += nrecip
-      let pn = lerp(lerp(p0, p1, t), lerp(p1, p2, t), t)
-      drawLine(p, pn)
-      p = pn
+  proc addQuadratic(shape: var seq[Segment], at, ctrl, to: Vec2) =
 
-    drawLine(p, p2)
+    proc compute(at, ctrl, to: Vec2, t: float32): Vec2 {.inline.} =
+      pow(1 - t, 2) * at +
+      2 * (1 - t) * t * ctrl +
+      pow(t, 2) * to
 
-  proc drawArc(
+    var prev = at
+
+    proc discretize(shape: var seq[Segment], i, steps: int) =
+      # Closure captures at, ctrl, to and prev
+      let
+        tPrev = (i - 1).float32 / steps.float32
+        t = i.float32 / steps.float32
+        next = compute(at, ctrl, to, t)
+        halfway = compute(at, ctrl, to, tPrev + (t - tPrev) / 2)
+        midpoint = (prev + next) / 2
+        error = (midpoint - halfway).length
+
+      if error >= errorMargin:
+        # Error too large, double precision for this step
+        shape.discretize(i * 2 - 1, steps * 2)
+        shape.discretize(i * 2, steps * 2)
+      else:
+        shape.add(segment(prev, next))
+        prev = next
+
+    shape.discretize(1, 1)
+
+  proc addArc(
+    shape: var seq[Segment],
     at, radii: Vec2,
     rotation: float32,
     large, sweep: bool,
@@ -513,7 +522,7 @@ proc commandsToPolygons*(commands: seq[PathCommand]): seq[seq[Vec2]] =
 
     var prev = at
 
-    proc discretize(arc: ArcParams, i, steps: int) =
+    proc discretize(shape: var seq[Segment], arc: ArcParams, i, steps: int) =
       let
         step = arc.delta / steps.float32
         aPrev = arc.theta + step * (i - 1).float32
@@ -523,277 +532,278 @@ proc commandsToPolygons*(commands: seq[PathCommand]): seq[seq[Vec2]] =
         midpoint = (prev + next) / 2
         error = (midpoint - halfway).length
 
-      if error >= 0.25:
+      if error >= errorMargin:
         # Error too large, try again with doubled precision
-        discretize(arc, i * 2 - 1, steps * 2)
-        discretize(arc, i * 2, steps * 2)
+        shape.discretize(arc, i * 2 - 1, steps * 2)
+        shape.discretize(arc, i * 2, steps * 2)
       else:
-        drawLine(prev, next)
+        shape.add(segment(prev, next))
         prev = next
 
     let arc = endpointToCenterArcParams(at, radii, rotation, large, sweep, to)
-    discretize(arc, 1, 1)
+    shape.discretize(arc, 1, 1)
 
-  for command in commands:
+  for command in path.commands:
     if command.numbers.len != command.kind.parameterCount():
       raise newException(PixieError, "Invalid path")
 
-    case command.kind
-      of Move:
-        at.x = command.numbers[0]
-        at.y = command.numbers[1]
-        start = at
+    case command.kind:
+    of Move:
+      at.x = command.numbers[0]
+      at.y = command.numbers[1]
+      start = at
 
-      of Line:
-        to.x = command.numbers[0]
-        to.y = command.numbers[1]
-        drawLine(at, to)
-        at = to
+    of Line:
+      let to = vec2(command.numbers[0], command.numbers[1])
+      shape.add(segment(at, to))
+      at = to
 
-      of VLine:
-        to.x = at.x
-        to.y = command.numbers[0]
-        drawLine(at, to)
-        at = to
+    of HLine:
+      let to = vec2(command.numbers[0], at.y)
+      shape.add(segment(at, to))
+      at = to
 
-      of HLine:
-        to.x = command.numbers[0]
-        to.y = at.y
-        drawLine(at, to)
-        at = to
+    of VLine:
+      let to = vec2(at.x, command.numbers[0])
+      shape.add(segment(at, to))
+      at = to
 
-      of Quad:
-        var i = 0
-        while i < command.numbers.len:
-          ctr.x = command.numbers[i+0]
-          ctr.y = command.numbers[i+1]
-          to.x = command.numbers[i+2]
-          to.y = command.numbers[i+3]
+    of Cubic:
+      let
+        ctrl1 = vec2(command.numbers[0], command.numbers[1])
+        ctrl2 = vec2(command.numbers[2], command.numbers[3])
+        to = vec2(command.numbers[4], command.numbers[5])
+      shape.addCubic(at, ctrl1, ctrl2, to)
+      at = to
+      prevCtrl2 = ctrl2
 
-          drawQuad(at, ctr, to)
-          at = to
-          i += 4
+    of SCubic:
+      let
+        ctrl2 = vec2(command.numbers[0], command.numbers[1])
+        to = vec2(command.numbers[2], command.numbers[3])
+      if prevCommandKind in {Cubic, SCubic, RCubic, RSCubic}:
+        let ctrl1 = 2 * at - prevCtrl2
+        shape.addCubic(at, ctrl1, ctrl2, to)
+      else:
+        shape.addCubic(at, at, ctrl2, to)
+      at = to
+      prevCtrl2 = ctrl2
 
-      of TQuad:
-        if prevCommand != Quad and prevCommand != TQuad:
-          ctr = at
-        to.x = command.numbers[0]
-        to.y = command.numbers[1]
-        ctr = at - (ctr - at)
-        drawQuad(at, ctr, to)
-        at = to
+    of Quad:
+      let
+        ctrl = vec2(command.numbers[0], command.numbers[1])
+        to = vec2(command.numbers[2], command.numbers[3])
+      shape.addQuadratic(at, ctrl, to)
+      at = to
+      prevCtrl = ctrl
 
-      of Cubic:
-        ctr.x = command.numbers[0]
-        ctr.y = command.numbers[1]
-        ctr2.x = command.numbers[2]
-        ctr2.y = command.numbers[3]
-        to.x = command.numbers[4]
-        to.y = command.numbers[5]
-        drawCurve(at, ctr, ctr2, to)
-        at = to
-
-      of Arc:
-        let
-          radii = vec2(command.numbers[0], command.numbers[1])
-          rotation = command.numbers[2]
-          large = command.numbers[3] == 1
-          sweep = command.numbers[4] == 1
-          to = vec2(command.numbers[5], command.numbers[6])
-        drawArc(at, radii, rotation, large, sweep, to)
-        at = to
-
-      of Close:
-        if at != start:
-          if prevCommand == Quad or prevCommand == TQuad:
-            drawQuad(at, ctr, start)
+    of TQuad:
+      let
+        to = vec2(command.numbers[0], command.numbers[1])
+        ctrl =
+          if prevCommandKind in {Quad, TQuad, RQuad, RTQuad}:
+            2 * at - prevCtrl
           else:
-            drawLine(at, start)
-        if polygon.len > 0:
-          result.add(polygon)
-        polygon = newSeq[Vec2]()
+            at
+      shape.addQuadratic(at, ctrl, to)
+      at = to
+      prevCtrl = ctrl
+
+    of Arc:
+      let
+        radii = vec2(command.numbers[0], command.numbers[1])
+        rotation = command.numbers[2]
+        large = command.numbers[3] == 1
+        sweep = command.numbers[4] == 1
+        to = vec2(command.numbers[5], command.numbers[6])
+      shape.addArc(at, radii, rotation, large, sweep, to)
+      at = to
+
+    of RMove:
+      at.x += command.numbers[0]
+      at.y += command.numbers[1]
+      start = at
+
+    of RLine:
+      let to = vec2(at.x + command.numbers[0], at.y + command.numbers[1])
+      shape.add(segment(at, to))
+      at = to
+
+    of RHLine:
+      let to = vec2(at.x + command.numbers[0], at.y)
+      shape.add(segment(at, to))
+      at = to
+
+    of RVLine:
+      let to = vec2(at.x, at.y + command.numbers[0])
+      shape.add(segment(at, to))
+      at = to
+
+    of RCubic:
+      let
+        ctrl1 = vec2(at.x + command.numbers[0], at.y + command.numbers[1])
+        ctrl2 = vec2(at.x + command.numbers[2], at.y + command.numbers[3])
+        to = vec2(at.x + command.numbers[4], at.y + command.numbers[5])
+      shape.addCubic(at, ctrl1, ctrl2, to)
+      at = to
+      prevCtrl2 = ctrl2
+
+    of RSCubic:
+      let
+        ctrl2 = vec2(at.x + command.numbers[0], at.y + command.numbers[1])
+        to = vec2(at.x + command.numbers[2], at.y + command.numbers[3])
+        ctrl1 =
+          if prevCommandKind in {Cubic, SCubic, RCubic, RSCubic}:
+            2 * at - prevCtrl2
+          else:
+            at
+      shape.addCubic(at, ctrl1, ctrl2, to)
+      at = to
+      prevCtrl2 = ctrl2
+
+    of RQuad:
+      let
+        ctrl = vec2(at.x + command.numbers[0], at.y + command.numbers[1])
+        to = vec2(at.x + command.numbers[2], at.y + command.numbers[3])
+      shape.addQuadratic(at, ctrl, to)
+      at = to
+      prevCtrl = ctrl
+
+    of RTQuad:
+      let
+        to = vec2(at.x + command.numbers[0], at.y + command.numbers[1])
+        ctrl =
+          if prevCommandKind in {Quad, TQuad, RQuad, RTQuad}:
+            2 * at - prevCtrl
+          else:
+            at
+      shape.addQuadratic(at, ctrl, to)
+      at = to
+      prevCtrl = ctrl
+
+    of RArc:
+      let
+        radii = vec2(command.numbers[0], command.numbers[1])
+        rotation = command.numbers[2]
+        large = command.numbers[3] == 1
+        sweep = command.numbers[4] == 1
+        to = vec2(at.x + command.numbers[5], at.y + command.numbers[6])
+      shape.addArc(at, radii, rotation, large, sweep, to)
+      at = to
+
+    of Close:
+      if at != start:
+        shape.add(segment(at, start))
         at = start
+      if shape.len > 0:
+        result.add(shape)
+        shape.setLen(0)
 
-      of RMove:
-        at.x += command.numbers[0]
-        at.y += command.numbers[1]
-        start = at
+    prevCommandKind = command.kind
 
-      of RLine:
-        to.x = at.x + command.numbers[0]
-        to.y = at.y + command.numbers[1]
-        drawLine(at, to)
-        at = to
+  if shape.len > 0:
+    result.add(shape)
 
-      of RVLine:
-        to.x = at.x
-        to.y = at.y + command.numbers[0]
-        drawLine(at, to)
-        at = to
-
-      of RHLine:
-        to.x = at.x + command.numbers[0]
-        to.y = at.y
-        drawLine(at, to)
-        at = to
-
-      of RQuad:
-        ctr.x = at.x + command.numbers[0]
-        ctr.y = at.y + command.numbers[1]
-        to.x = at.x + command.numbers[2]
-        to.y = at.y + command.numbers[3]
-        drawQuad(at, ctr, to)
-        at = to
-
-      of RTQuad:
-        if prevCommand != RQuad and prevCommand != RTQuad:
-          ctr = at
-        to.x = at.x + command.numbers[0]
-        to.y = at.y + command.numbers[1]
-        ctr = at - (ctr - at)
-        drawQuad(at, ctr, to)
-        at = to
-
-      of RCubic:
-        ctr.x = at.x + command.numbers[0]
-        ctr.y = at.y + command.numbers[1]
-        ctr2.x = at.x + command.numbers[2]
-        ctr2.y = at.y + command.numbers[3]
-        to.x = at.x + command.numbers[4]
-        to.y = at.y + command.numbers[5]
-        drawCurve(at, ctr, ctr2, to)
-        at = to
-
-      of RSCubic:
-        if prevCommand in {Cubic, SCubic, RCubic, RSCubic}:
-          ctr = 2 * at - ctr2
-        else:
-          ctr = at
-        ctr2.x = at.x + command.numbers[0]
-        ctr2.y = at.y + command.numbers[1]
-        to.x = at.x + command.numbers[2]
-        to.y = at.y + command.numbers[3]
-        drawCurve(at, ctr, ctr2, to)
-        at = to
-
-      else:
-       raise newException(ValueError, "not supported path command " & $command)
-
-    prevCommand = command.kind
-
-  if polygon.len > 0:
-    result.add(polygon)
-
-iterator zipline*[T](s: seq[T]): (T, T) =
-  ## Return elements in pairs: (1st, 2nd), (2nd, 3rd) ... (nth, last).
-  for i in 0 ..< s.len - 1:
-    yield(s[i], s[i + 1])
-
-iterator segments*(s: seq[Vec2]): Segment =
-  ## Return elements in pairs: (1st, 2nd), (2nd, 3rd) ... (last, 1st).
-  for i in 0 ..< s.len - 1:
-    yield(Segment(at: s[i], to: s[i + 1]))
-  # if s.len > 0:
-  #   let
-  #     first = s[0]
-  #     last = s[^1]
-    # if first != last:
-    #   yield(Segment(at: s[^1], to: s[0]))
-
-proc strokePolygons*(ps: seq[seq[Vec2]], strokeWidthR, strokeWidthL: float32): seq[seq[Vec2]] =
-  ## Converts simple polygons into stroked versions:
-  # TODO: Stroke location, add caps and joins.
-  for p in ps:
-    var poly: seq[Vec2]
-    var back: seq[Vec2] # Back side of poly.
-    var prevRSeg: Segment
-    var prevLSeg: Segment
-    var first = true
-    for (at, to) in p.zipline:
-      let tangent = (at - to).normalize()
-      let normal = vec2(-tangent.y, tangent.x)
-
-      var
-        rSeg = segment(at + normal * strokeWidthR, to + normal * strokeWidthR)
-        lSeg = segment(at - normal * strokeWidthL, to - normal * strokeWidthL)
-
-      if first:
-        first = false
-        # TODO: draw start cap
-      else:
-        var touch: Vec2
-        if intersects(prevRSeg, rSeg, touch):
-          rSeg.at = touch
-          poly.setLen(poly.len - 1)
-        else:
-          discard # TODO: draw joint
-
-        if intersects(prevLSeg, lSeg, touch):
-          lSeg.at = touch
-          back.setLen(back.len - 1)
-        else:
-          discard # TODO: draw joint
-
-      poly.add rSeg.at
-      back.add lSeg.at
-      poly.add rSeg.to
-      back.add lSeg.to
-
-      prevRSeg = rSeg
-      prevLSeg = lSeg
-
-    # Add the backside reversed:
-    for i in 1 .. back.len:
-      poly.add back[^i]
-
-    # TODO: draw end cap
-    # Cap it at the end:
-    poly.add poly[0]
-
-    result.add(poly)
-
-proc computeBounds(poly: seq[Vec2]): Rect =
-  if poly.len == 0:
+proc strokeShapes(
+  shapes: seq[seq[Segment]],
+  color: ColorRGBA,
+  strokeWidth: float32,
+  windingRule: WindingRule
+): seq[seq[Segment]] =
+  if strokeWidth == 0:
     return
-  proc min(a, b: Vec2): Vec2 =
-    result.x = min(a.x, b.x)
-    result.y = min(a.y, b.y)
-  proc max(a, b: Vec2): Vec2 =
-    result.x = max(a.x, b.x)
-    result.y = max(a.y, b.y)
-  proc floor(a: Vec2): Vec2 =
-    result.x = a.x.floor
-    result.y = a.y.floor
-  proc ceil(a: Vec2): Vec2 =
-    result.x = a.x.ceil
-    result.y = a.y.ceil
+
+  let
+    widthLeft = strokeWidth / 2
+    widthRight = strokeWidth / 2
+
+  for shape in shapes:
+    var
+      points: seq[Vec2]
+      back: seq[Vec2]
+    for segment in shape:
+      let
+        tangent = (segment.at - segment.to).normalize()
+        normal = vec2(-tangent.y, tangent.x)
+        left = segment(
+          segment.at - normal * widthLeft,
+          segment.to - normal * widthLeft
+        )
+        right = segment(
+          segment.at + normal * widthRight,
+          segment.to + normal * widthRight
+        )
+
+      points.add([right.at, right.to])
+      back.add([left.at, left.to])
+
+    # Add the back side reversed
+    for i in 1 .. back.len:
+      points.add(back[^i])
+
+    points.add(points[0])
+
+    # Walk the points to create the shape
+    var strokeShape: seq[Segment]
+    for i in 0 ..< points.len - 1:
+      strokeShape.add(segment(points[i], points[i + 1]))
+
+    if strokeShape.len > 0:
+      result.add(strokeShape)
+
+proc computeBounds(shape: seq[Segment]): Rect =
   var
-    vMin = poly[0]
-    vMax = poly[0]
-  for v in poly:
-    vMin = min(v, vMin)
-    vMax = max(v, vMax)
-  result.xy = vMin.floor
-  result.wh = (vMax - vMin).ceil
+    xMin = float32.high
+    xMax = float32.low
+    yMin = float32.high
+    yMax = float32.low
+  for segment in shape:
+    xMin = min(xMin, min(segment.at.x, segment.to.x))
+    xMax = max(xMax, max(segment.at.x, segment.to.x))
+    yMin = min(yMin, min(segment.at.y, segment.to.y))
+    yMax = max(yMax, max(segment.at.y, segment.to.y))
+
+  xMin = floor(xMin)
+  xMax = ceil(xMax)
+  yMin = floor(yMin)
+  yMax = ceil(yMax)
+
+  result.x = xMin
+  result.y = yMin
+  result.w = xMax - xMin
+  result.h = yMax - yMin
 
 {.push checks: off, stacktrace: off.}
 
-proc fillPolygons*(
+proc fillShapes*(
   image: Image,
-  size: Vec2,
-  polys: seq[seq[Vec2]],
+  shapes: seq[seq[Segment]],
   color: ColorRGBA,
   windingRule: WindingRule,
   quality = 4
 ) =
-  var bounds = newSeq[Rect](polys.len)
-  for i, poly in polys:
-    bounds[i] = computeBounds(poly)
+  var sortedShapes = newSeq[seq[(Segment, bool)]](shapes.len)
+  for i, sorted in sortedShapes.mpairs:
+    for j, segment in shapes[i]:
+      if segment.at.y == segment.to.y or segment.at - segment.to == Vec2():
+        # Skip horizontal and zero-length
+        continue
+      var
+        segment = segment
+        winding = segment.at.y > segment.to.y
+      if winding:
+        swap(segment.at, segment.to)
+      sorted.add((segment, winding))
+
+  # Compute the bounds of each shape
+  var bounds = newSeq[Rect](shapes.len)
+  for i, shape in shapes:
+    bounds[i] = computeBounds(shape)
 
   const ep = 0.0001 * PI
 
   proc scanLineHits(
-    polys: seq[seq[Vec2]],
+    shapes: seq[seq[(Segment, bool)]],
     bounds: seq[Rect],
     hits: var seq[(float32, bool)],
     size: Vec2,
@@ -804,25 +814,17 @@ proc fillPolygons*(
 
     let
       yLine = y.float32 + ep + shiftY
-      scan = Line(a: vec2(-10000, yLine), b: vec2(10000, yLine))
+      scanline = Line(a: vec2(-10000, yLine), b: vec2(10000, yLine))
 
-    for i, poly in polys:
+    for i, shape in shapes:
       let bounds = bounds[i]
       if bounds.y > y.float32 or bounds.y + bounds.h < y.float32:
         continue
-      for line in poly.segments:
-        if line.at.y == line.to.y: # Skip horizontal lines
-          continue
-        var line2 = line
-        if line2.at.y > line2.to.y: # Sort order doesn't actually matter
-          swap(line2.at, line2.to)
+      for (segment, winding) in shape:
         # Lines often connect and we need them to not share starts and ends
         var at: Vec2
-        if line2.intersects(scan, at) and line2.to != at:
-          let
-            winding = line.at.y > line.to.y
-            x = at.x.clamp(0, size.x)
-          hits.add((x, winding))
+        if scanline.intersects(segment, at) and segment.to != at:
+          hits.add((at.x.clamp(0, size.x), winding))
 
     hits.sort(proc(a, b: (float32, bool)): int = cmp(a[0], b[0]))
 
@@ -835,7 +837,7 @@ proc fillPolygons*(
 
     # Do scan lines for this row.
     for m in 0 ..< quality:
-      polys.scanLineHits(bounds, hits, size, y, float32(m) / float32(quality))
+      sortedShapes.scanLineHits(bounds, hits, image.wh, y, float32(m) / float32(quality))
       if hits.len == 0:
         continue
       var
@@ -877,17 +879,15 @@ proc fillPolygons*(
 
 {.pop.}
 
-type SomePath = seq[seq[Vec2]] | string | Path | seq[PathCommand]
+type SomePath = seq[seq[Segment]] | string | Path
 
-proc parseSomePath(path: SomePath): seq[seq[Vec2]] =
+proc parseSomePath(path: SomePath): seq[seq[Segment]] =
   ## Given some path, turns it into polys.
   when type(path) is string:
-    commandsToPolygons(parsePath(path).commands)
+    commandsToShapes(parsePath(path))
   elif type(path) is Path:
-    commandsToPolygons(path.commands)
-  elif type(path) is seq[PathCommand]:
-    commandsToPolygons(path)
-  elif type(path) is seq[seq[Vec2]]:
+    commandsToShapes(path)
+  elif type(path) is seq[seq[Segment]]:
     path
 
 proc fillPath*(
@@ -896,9 +896,8 @@ proc fillPath*(
   color: ColorRGBA,
   windingRule = wrNonZero
 ) =
-  let
-    polys = parseSomePath(path)
-  image.fillPolygons(image.wh, polys, color, windingRule)
+  let polys = parseSomePath(path)
+  image.fillShapes(polys, color, windingRule)
 
 proc fillPath*(
   image: Image,
@@ -911,7 +910,7 @@ proc fillPath*(
   for poly in polys.mitems:
     for i, p in poly.mpairs:
       poly[i] = p + pos
-  image.fillPolygons(image.wh, polys, color, windingRule)
+  image.fillShapes(polys, color, windingRule)
 
 proc fillPath*(
   image: Image,
@@ -924,24 +923,7 @@ proc fillPath*(
   for poly in polys.mitems:
     for i, p in poly.mpairs:
       poly[i] = mat * p
-  image.fillPolygons(image.wh, polys, color, windingRule)
-
-proc strokePath*(
-  image: Image,
-  path: Path,
-  color: ColorRGBA,
-  strokeWidth: float32 = 1.0,
-  windingRule = wrNonZero
-  # TODO: Add more params:
-  # strokeLocation: StrokeLocation,
-  # strokeCap: StorkeCap,
-  # strokeJoin: StorkeJoin
-) =
-  let
-    polys = parseSomePath(path)
-    (strokeL, strokeR) = (strokeWidth/2, strokeWidth/2)
-    polys2 = strokePolygons(polys, strokeL, strokeR)
-  image.fillPath(polys2, color, windingRule)
+  image.fillShapes(polys, color, windingRule)
 
 proc strokePath*(
   image: Image,
@@ -950,7 +932,13 @@ proc strokePath*(
   strokeWidth: float32,
   windingRule = wrNonZero
 ) =
-  image.strokePath(parsePath(path), color, strokeWidth)
+  var strokeShapes = strokeShapes(
+    parseSomePath(path),
+    color,
+    strokeWidth,
+    windingRule
+  )
+  image.fillShapes(strokeShapes, color, windingRule)
 
 proc strokePath*(
   image: Image,
@@ -960,13 +948,16 @@ proc strokePath*(
   pos: Vec2,
   windingRule = wrNonZero
 ) =
-  var polys = parseSomePath(path)
-  let (strokeL, strokeR) = (strokeWidth/2, strokeWidth/2)
-  var polys2 = strokePolygons(polys, strokeL, strokeR)
-  for poly in polys2.mitems:
-    for i, p in poly.mpairs:
-      poly[i] = p + pos
-  image.fillPolygons(image.wh, polys2, color, windingRule)
+  var strokeShapes = strokeShapes(
+    parseSomePath(path),
+    color,
+    strokeWidth,
+    windingRule
+  )
+  for shape in strokeShapes.mitems:
+    for segment in shape.mitems:
+      segment += pos
+  image.fillShapes(strokeShapes, color, windingRule)
 
 proc strokePath*(
   image: Image,
@@ -976,10 +967,13 @@ proc strokePath*(
   mat: Mat3,
   windingRule = wrNonZero
 ) =
-  var polys = parseSomePath(path)
-  let (strokeL, strokeR) = (strokeWidth/2, strokeWidth/2)
-  var polys2 = strokePolygons(polys, strokeL, strokeR)
-  for poly in polys2.mitems:
-    for i, p in poly.mpairs:
-      poly[i] = mat * p
-  image.fillPolygons(image.wh, polys2, color, windingRule)
+  var strokeShapes = strokeShapes(
+    parseSomePath(path),
+    color,
+    strokeWidth,
+    windingRule
+  )
+  for shape in strokeShapes.mitems:
+    for segment in shape.mitems:
+      segment = mat * segment
+  image.fillShapes(strokeShapes, color, windingRule)