1 files changed, 44 insertions, 0 deletions
diff --git a/src/addons/GifMaker/GifDecoder.gd b/src/addons/GifMaker/GifDecoder.gd
new file mode 100644
index 0000000..08ccaa9
--- /dev/null
+++ b/src/addons/GifMaker/GifDecoder.gd
@@ -0,0 +1,44 @@
+extends Node
+class_name GifDecoder
+
+func decode_file(path):
+	var file = File.new()
+	file.open(path, File.READ)
+	var bytes = file.get_buffer(file.get_len())
+	file.close()
+
+	return decode_data(bytes)
+
+func decode_block(block: PoolByteArray, start, end):
+	var string = block.subarray(start, end).get_string_from_utf8()
+	if string.begins_with('GIF_MAKER::'):
+		return str2var(string.substr('GIF_MAKER::'.length(), string.length()))
+	return string
+
+func decode_data(bytes: PoolByteArray):
+	var index = 0
+	var start = -1
+	var end = -1
+	var data = []
+
+	for byte in bytes:
+		if start != -1 \
+				and byte == 0x21:
+			end = index - 1
+
+			data.append(decode_block(bytes, start, end))
+			start = -1
+			end = -1
+
+		if byte == 0x21 \
+				and index < bytes.size() \
+				and bytes[index + 1] == 0xFE:
+			start = index + 2
+
+		index += 1
+
+	if end == -1 and start != -1:
+		end = bytes.size() - 1
+		data.append(decode_block(bytes, start, end))
+
+	return data