From 7bb561f31e0ee57a388032b760b7db943dd6b36c Mon Sep 17 00:00:00 2001 From: Sébastien Dailly Date: Fri, 1 Jan 2021 23:18:35 +0100 Subject: Update --- path/path.ml | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100755 path/path.ml (limited to 'path') diff --git a/path/path.ml b/path/path.ml new file mode 100755 index 0000000..9b6b9c4 --- /dev/null +++ b/path/path.ml @@ -0,0 +1,112 @@ +(** Common module for ensuring that the function is evaluated only once *) + +module Point = Point + +module type REPRESENTABLE = sig + type t + + (** Represent the path *) + val repr + : t -> (module Repr.M with type t = Point.t and type repr = 's) -> 's -> 's +end + +module Path_Builder = Builder.Make(Point) +module Fixed = Fixed.Make(Point) + +(* Canva representation *) + +module FillCanvaRepr = FillPrinter.Make(Layer.CanvaPrinter) +module LineCanvaRepr = LinePrinter.Make(Layer.CanvaPrinter) +module WireCanvaRepr = WireFramePrinter.Make(Layer.CanvaPrinter) + +(* SVG representation *) + +module FillSVGRepr = FillPrinter.Make(Layer.Svg) +module LineSVGRepr = LinePrinter.Make(Layer.Svg) +module WireSVGRepr = WireFramePrinter.Make(Layer.Svg) + + +type printer = + [ `Fill + | `Line + | `Wire ] + +(** Draw a path to a canva *) +let to_canva + : (module REPRESENTABLE with type t = 's) -> 's -> Brr_canvas.C2d.t -> printer -> unit + = fun (type s) (module R:REPRESENTABLE with type t = s) path ctx -> function + | `Fill -> + R.repr + path + (module FillCanvaRepr) + (FillCanvaRepr.create_path (fun p -> Brr_canvas.C2d.fill ctx p; p)) + |> FillCanvaRepr.get + |> Brr_canvas.C2d.stroke ctx + | `Line -> + R.repr + path + (module LineCanvaRepr) + (LineCanvaRepr.create_path (fun p -> Brr_canvas.C2d.fill ctx p; p)) + |> LineCanvaRepr.get + |> Brr_canvas.C2d.stroke ctx + | `Wire -> + R.repr + path + (module WireCanvaRepr) + (WireCanvaRepr.create_path (fun p -> Brr_canvas.C2d.fill ctx p; p)) + |> WireCanvaRepr.get + |> Brr_canvas.C2d.stroke ctx + + +(** Draw a path and represent it as SVG *) +let to_svg + : (module REPRESENTABLE with type t = 's) -> color:Jstr.t -> 's -> printer -> Brr.El.t + = fun (type s) (module R:REPRESENTABLE with type t = s) ~color path -> function + | `Fill -> + + (* In order to deal with over crossing path, I cut the path in as + many segment as there is curve, and fill them all. Then, all of theme + are grouped inside a single element *) + let paths = ref [] in + let _ = R.repr + path + (module FillSVGRepr) + (FillSVGRepr.create_path + (fun p -> + let repr = Layer.Svg.path + ~at:Brr.At.[ v (Jstr.v "d") p ] + [] in + + paths := repr::!paths; + Jstr.empty)) in + + Brr.El.v (Jstr.v "g") + ~at:Brr.At.[ + v (Jstr.v "fill") color + ; v (Jstr.v "stroke") color] + !paths + + | `Line -> + let svg_path = R.repr + path + (module LineSVGRepr) + (LineSVGRepr.create_path (fun _ -> ())) + |> LineSVGRepr.get in + Layer.Svg.path + ~at:Brr.At.[ + v (Jstr.v "fill") color + ; v (Jstr.v "stroke") color + ; v (Jstr.v "d") svg_path ] + [] + | `Wire -> + let svg_path = R.repr + path + (module WireSVGRepr) + (WireSVGRepr.create_path (fun _ -> ())) + |> WireSVGRepr.get in + Layer.Svg.path + ~at:Brr.At.[ + v (Jstr.v "fill") color + ; v (Jstr.v "stroke") color + ; v (Jstr.v "d") svg_path ] + [] -- cgit v1.2.3