Position background rect at 0,0

This is important when terminal is a child of a Container node and we
set the margin properties, otherwise the background rect is drawn with
an offset.

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Changed
 - Updated build script (`addons/godot_xterm/native/build.sh`). Git submodules will now be initialized if they haven't already. Moved nix-shell related stuff to a seperate shell.nix file so the same build command can be used on all Linux based OSes.
+- Positioned background rect at 0,0 so it is no longer offset if a margin is added when Terminal is a child of a Container node.
 
 ## [1.0.0] - 2020-10-05
 ### Added

addons/godot_xterm/native/src/terminal.cpp

@@ -371,7 +371,7 @@ void Terminal::_draw()
 		return;
 
 	/* Draw the full terminal rect background */
-	draw_rect(get_rect(), get_color("Background", "Terminal"));
+	draw_rect(Rect2(Vector2(0, 0), get_rect().size), get_color("Background", "Terminal"));
 
 	for (int row = 0; row < rows; row++)
 	{
@@ -597,4 +597,4 @@ void Terminal::write(Variant data)
 
 	tsm_vte_input(vte, u8, len);
 	framebuffer_age = tsm_screen_draw(screen, text_draw_cb, this);
-}
+}