1 files changed, 55 insertions, 0 deletions
diff --git a/game/addons/zylann.hterrain/native/factory.gd b/game/addons/zylann.hterrain/native/factory.gd
new file mode 100644
index 0000000..d2dfe56
--- /dev/null
+++ b/game/addons/zylann.hterrain/native/factory.gd
@@ -0,0 +1,55 @@
+@tool
+
+const NATIVE_PATH = "res://addons/zylann.hterrain/native/"
+
+const HT_ImageUtilsGeneric = preload("./image_utils_generic.gd")
+const HT_QuadTreeLodGeneric = preload("./quad_tree_lod_generic.gd")
+
+# No native code was ported when moving to Godot 4.
+# It may be changed too using GDExtension.
+
+# See https://docs.godotengine.org/en/stable/classes/class_os.html#class-os-method-get-name
+const _supported_os = {
+	# "Windows": true,
+	# "X11": true,
+	# "OSX": true
+}
+# See https://docs.godotengine.org/en/stable/tutorials/export/feature_tags.html
+const _supported_archs = ["x86_64"]
+
+
+static func _supports_current_arch() -> bool:
+	for arch in _supported_archs:
+		# This is misleading, we are querying features of the ENGINE, not the OS
+		if OS.has_feature(arch):
+			return true
+	return false
+
+
+static func is_native_available() -> bool:
+	if not _supports_current_arch():
+		return false
+	var os = OS.get_name()
+	if not _supported_os.has(os):
+		return false
+	# API changes can cause binary incompatibility
+	var v = Engine.get_version_info()
+	return v.major == 4 and v.minor == 0
+
+
+static func get_image_utils():
+	if is_native_available():
+		var HT_ImageUtilsNative = load(NATIVE_PATH + "image_utils.gdns")
+		# TODO Godot doesn't always return `null` when it fails so that `if` doesn't always help...
+		# See https://github.com/Zylann/godot_heightmap_plugin/issues/331
+		if HT_ImageUtilsNative != null:
+			return HT_ImageUtilsNative.new()
+	return HT_ImageUtilsGeneric.new()
+
+
+static func get_quad_tree_lod():
+	if is_native_available():
+		var HT_QuadTreeLod = load(NATIVE_PATH + "quad_tree_lod.gdns")
+		if HT_QuadTreeLod != null:
+			return HT_QuadTreeLod.new()
+	return HT_QuadTreeLodGeneric.new()