From 9f35e45b17f88e7e59c6645e68be45441b46c38c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Barnab=C3=A1s=20P=C5=91cze?=
 <barnabas.pocze@ideasonboard.com>
Date: Mon, 16 Feb 2026 15:47:07 +0100
Subject: [PATCH] apps: qcam: Show `QImageWriter` errors
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When saving the current iamge, `QImageWriter::write()` may fail for various
reasons. However, this is currently not reported in any way.

Use a simple `QMessageBox` to report the issues.

Link: https://gitlab.freedesktop.org/camera/libcamera/-/issues/313
Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 src/apps/qcam/main_window.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/apps/qcam/main_window.cpp b/src/apps/qcam/main_window.cpp
index 96a2d509..5a88c5aa 100644
--- a/src/apps/qcam/main_window.cpp
+++ b/src/apps/qcam/main_window.cpp
@@ -18,6 +18,7 @@
 #include <QFileDialog>
 #include <QImage>
 #include <QImageWriter>
+#include <QMessageBox>
 #include <QMutexLocker>
 #include <QStandardPaths>
 #include <QStringList>
@@ -637,7 +638,8 @@ void MainWindow::saveImageAs()
 
 	QImageWriter writer(filename);
 	writer.setQuality(95);
-	writer.write(image);
+	if (!writer.write(image))
+		QMessageBox::warning(this, "Failed to save image", writer.errorString());
 }
 
 void MainWindow::captureRaw()