From f2e582622e25b4959e8df4d1dad017faabdd4c90 Mon Sep 17 00:00:00 2001
From: David Vogel <Dadido3@aol.com>
Date: Sat, 23 Jul 2022 22:36:14 +0200
Subject: [PATCH] Add LuaNXML library

- Change VSCode lua addon to not ignore submodules
- Add function to read resolutions from Noita config file
---
 .gitmodules                     |  3 +++
 .vscode/settings.json           |  3 ++-
 README.md                       |  4 ++++
 files/libraries/coordinates.lua | 20 ++++++++++++++++++++
 files/libraries/luanxml         |  1 +
 init.lua                        | 10 ++++++++++
 6 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 .gitmodules
 create mode 160000 files/libraries/luanxml

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..3977915
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "files/libraries/luanxml"]
+	path = files/libraries/luanxml
+	url = https://github.com/zatherz/luanxml
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 4c8b7f8..9cc708f 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -35,5 +35,6 @@
     "Lua.runtime.version": "LuaJIT",
     "Lua.format.defaultConfig": {
         "max_line_length": "512"
-    }
+    },
+    "Lua.workspace.ignoreSubmodules": false
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index f1464eb..7f11081 100644
--- a/README.md
+++ b/README.md
@@ -112,6 +112,10 @@ The rectangles for the different capture modes are defined in `.../Noita/mods/no
 
 As the resulting stitched image is really big, you can read [this comment](https://github.com/Dadido3/noita-mapcap/issues/7#issuecomment-723591552) that addresses how you can view, convert or even self-host your images.
 
+## Acknowledgements
+
+This addon uses the [LuaNXML](https://github.com/zatherz/luanxml) library by [Zatherz](https://github.com/zatherz).
+
 ## License
 
 [MIT](LICENSE)
diff --git a/files/libraries/coordinates.lua b/files/libraries/coordinates.lua
index e17d78e..159c810 100644
--- a/files/libraries/coordinates.lua
+++ b/files/libraries/coordinates.lua
@@ -10,6 +10,8 @@
 --------------------------
 
 local CameraAPI = require("noita-api.camera")
+local NXML = require("luanxml.nxml")
+local Utils = require("noita-api.utils")
 local Vec2 = require("noita-api.vec2")
 
 ----------
@@ -26,6 +28,24 @@ local Coords = {
 	VirtualResolution = Vec2(0, 0),
 }
 
+---Reads and updates the internal, window and virtual resolutions from Noita's config files and API.
+---@return any error
+function Coords:ReadResolutions()
+	local filename = Utils.GetSpecialDirectory("save-shared") .. "config.xml"
+
+	local f, err = io.open(filename, "r")
+	if not f then return err end
+
+	local xml = NXML.parse(f:read("*a"))
+
+	self.WindowResolution = Vec2(tonumber(xml.attr["window_w"]), tonumber(xml.attr["window_h"]))
+	self.InternalResolution = Vec2(tonumber(xml.attr["internal_size_w"]), tonumber(xml.attr["internal_size_h"]))
+	self.VirtualResolution = Vec2(tonumber(MagicNumbersGetValue("VIRTUAL_RESOLUTION_X")), tonumber(MagicNumbersGetValue("VIRTUAL_RESOLUTION_Y")))
+
+	f:close()
+	return nil
+end
+
 ---Returns the size of the internal rectangle in window/screen coordinates.
 ---The internal rect is always uniformly scaled to fit inside the window rectangle.
 ---@return Vec2
diff --git a/files/libraries/luanxml b/files/libraries/luanxml
new file mode 160000
index 0000000..03d2890
--- /dev/null
+++ b/files/libraries/luanxml
@@ -0,0 +1 @@
+Subproject commit 03d28907ccced296e5b2f8b16303a312ab4eaa3b
diff --git a/init.lua b/init.lua
index 1ebf62a..8317619 100644
--- a/init.lua
+++ b/init.lua
@@ -16,6 +16,12 @@ if not async then
 	require("coroutines") -- Loads Noita's coroutines library from `data/scripts/lib/coroutines.lua`.
 end
 
+--------------------------
+-- Load library modules --
+--------------------------
+
+local Coords = require("coordinates")
+
 -------------------------------
 -- Load and run script files --
 -------------------------------
@@ -23,6 +29,7 @@ end
 dofile("mods/noita-mapcap/files/external.lua")
 dofile("mods/noita-mapcap/files/capture.lua")
 dofile("mods/noita-mapcap/files/ui.lua")
+--dofile("mods/noita-mapcap/files/blablabla.lua")
 
 --------------------
 -- Hook callbacks --
@@ -78,6 +85,9 @@ end
 ---The last point where the Mod API is available.
 ---After this materials.xml will be loaded.
 function OnMagicNumbersAndWorldSeedInitialized()
+	-- Get resolutions for correct coordinate transformations.
+	-- This needs to be done once all magic numbers are set.
+	Coords:ReadResolutions()
 end
 
 ---Called when the game is paused or unpaused.