From ec812521b31471ce9ac3d9bdf1288b1569defbc8 Mon Sep 17 00:00:00 2001
From: Sébastien Dailly <sebastien@chimrod.com>
Date: Wed, 23 Dec 2020 19:11:31 +0100
Subject: Add svg output

---
 layer/svg.ml | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100755 layer/svg.ml

(limited to 'layer/svg.ml')

diff --git a/layer/svg.ml b/layer/svg.ml
new file mode 100755
index 0000000..f174acc
--- /dev/null
+++ b/layer/svg.ml
@@ -0,0 +1,68 @@
+(** SVG representation *)
+
+open Brr
+
+module Path = Brr_canvas.C2d.Path
+module V2 = Gg.V2
+
+
+let svg : El.cons
+  = fun ?d ?at childs ->
+    El.v ?d ?at (Jstr.v "svg") childs
+
+let path: El.cons
+  = fun ?d ?at childs ->
+    El.v ?d ?at (Jstr.v "path") childs
+
+type 'a t = Jstr.t
+
+let create
+  : unit -> 'a t
+  = fun () -> Jstr.empty
+
+(* Start a new path. *)
+let move_to
+  : Gg.v2 -> 'a t -> 'a t
+  = fun point path ->
+    let x, y = V2.to_tuple point in
+
+    Jstr.append path @@
+    Jstr.concat ~sep:(Jstr.v " ")
+      [ Jstr.v " M"
+      ; Jstr.of_float x
+      ; Jstr.of_float y ]
+
+
+let line_to
+  : Gg.v2 -> 'a t -> 'a t
+  = fun  point path ->
+    let x, y = V2.to_tuple point in
+    Jstr.append path @@
+    Jstr.concat ~sep:(Jstr.v " ")
+      [ (Jstr.v " L")
+      ; (Jstr.of_float x)
+      ; (Jstr.of_float y) ]
+
+let quadratic_to
+  : Gg.v2 -> Gg.v2 -> Gg.v2 -> 'a t -> 'a t
+  = fun  ctrl0 ctrl1 p1 path ->
+    let cx, cy = V2.to_tuple ctrl0
+    and cx', cy' = V2.to_tuple ctrl1
+    and x, y = V2.to_tuple p1 in
+    Jstr.append path @@
+    Jstr.concat ~sep:(Jstr.v " ")
+      [ (Jstr.v " C")
+      ; (Jstr.of_float cx)
+      ; (Jstr.of_float cy)
+      ; (Jstr.v ",")
+      ; (Jstr.of_float cx')
+      ; (Jstr.of_float cy')
+      ; (Jstr.v ",")
+      ; (Jstr.of_float x)
+      ; (Jstr.of_float y) ]
+
+let close
+  : 'a t -> 'a t
+  = fun path ->
+    Jstr.append path (Jstr.v " Z")
+
-- 
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