From f02a040d48bc53ce8d90085b809db9a66c6ff2de Mon Sep 17 00:00:00 2001
From: Hugo Locurcio <hugo.locurcio@hugo.pro>
Date: Mon, 23 Mar 2020 22:09:22 +0100
Subject: [PATCH] Define a default minimum window size to workaround rendering
 issues

The minimum window size can still be set to `Vector2(0, 0)` in a script
if needed.

This closes #37242.
---
 doc/classes/DisplayServer.xml | 2 ++
 main/main.cpp                 | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/doc/classes/DisplayServer.xml b/doc/classes/DisplayServer.xml
index abb715b34e..4f495eaec9 100644
--- a/doc/classes/DisplayServer.xml
+++ b/doc/classes/DisplayServer.xml
@@ -649,6 +649,8 @@
 			<argument index="0" name="min_size" type="Vector2i" />
 			<argument index="1" name="window_id" type="int" default="0" />
 			<description>
+				Sets the minimum size for the given window to [code]min_size[/code] (in pixels).
+				[b]Note:[/b] By default, the main window has a minimum size of [code]Vector2i(64, 64)[/code]. This prevents issues that can arise when the window is resized to a near-zero size.
 			</description>
 		</method>
 		<method name="window_set_mode">
diff --git a/main/main.cpp b/main/main.cpp
index 6764332f16..1ab0f7e0d7 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -2242,6 +2242,10 @@ bool Main::start() {
 			DisplayServer::get_singleton()->window_set_title(appname);
 #endif
 
+			// Define a very small minimum window size to prevent bugs such as GH-37242.
+			// It can still be overridden by the user in a script.
+			DisplayServer::get_singleton()->window_set_min_size(Size2i(64, 64));
+
 			bool snap_controls = GLOBAL_DEF("gui/common/snap_controls_to_pixels", true);
 			sml->get_root()->set_snap_controls_to_pixels(snap_controls);