initHEADmain

1 files changed, 48 insertions, 0 deletions

diff --git a/lib/graphviz.lua b/lib/graphviz.lua
new file mode 100644
index 0000000..173612d
--- /dev/null
+++ b/lib/graphviz.lua
@@ -0,0 +1,48 @@
+--
+-- melisma - extensible and scriptable audio engine
+-- Copyright (C) 2026  Ludvig Gunne Lindström
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <https://www.gnu.org/licenses/>.
+--
+
+local module = {}
+
+function module.render(layout)
+  local lines = {}
+
+  local function append(format,...)
+    local line = string.format(format,...)
+    table.insert(lines,line)
+  end
+
+  append('digraph {')
+  append('rankdir=BT')
+  append('node [shape=rect]')
+
+  for id,node in pairs(layout) do
+    append('"%s" [label="%s"]',id,node.label or '?')
+  end
+
+  for id,node in pairs(layout) do
+    for _,input in ipairs(node.inputs) do
+      append('"%s" -> "%s"',input,id)
+    end
+  end
+
+  append('}')
+
+  return table.concat(lines,'\n')
+end
+
+return module