From 99ffe09b63e0d906cc1f502c24f4d2325e6cc09d Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sat, 14 Sep 2024 17:08:21 +0900
Subject: [PATCH] internal/ui: bug fix: skip focus check for the first update

---
 internal/ui/ui_glfw.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/internal/ui/ui_glfw.go b/internal/ui/ui_glfw.go
index 1b253618f..b3a47e03e 100644
--- a/internal/ui/ui_glfw.go
+++ b/internal/ui/ui_glfw.go
@@ -83,6 +83,7 @@ type userInterfaceImpl struct {
 
 	// bufferOnceSwapped must be accessed from the main thread.
 	bufferOnceSwapped bool
+	updateOnceCalled  bool
 
 	origWindowPosX        int
 	origWindowPosY        int
@@ -1276,6 +1277,10 @@ func (u *UserInterface) setFPSMode(fpsMode FPSModeType) error {
 
 // update must be called from the main thread.
 func (u *UserInterface) update() (float64, float64, error) {
+	defer func() {
+		u.updateOnceCalled = true
+	}()
+
 	if err := u.error(); err != nil {
 		return 0, 0, err
 	}
@@ -1383,7 +1388,9 @@ func (u *UserInterface) update() (float64, float64, error) {
 		}
 	}
 
-	for !u.isRunnableOnUnfocused() {
+	// If isRunnableOnUnfocused is false and the window is not focused, wait here.
+	// For the first update, skip this check as the window might not be seen yet in some environments like ChromeOS (#3091).
+	for !u.isRunnableOnUnfocused() && u.updateOnceCalled {
 		// In the initial state on macOS, the window is not shown (#2620).
 		visible, err := u.window.GetAttrib(glfw.Visible)
 		if err != nil {