From eb648e31122f40482f0a3da377e0b18d233cf964 Mon Sep 17 00:00:00 2001
From: Gary Wang <wzc782970009@gmail.com>
Date: Tue, 3 Mar 2020 09:53:23 +0800
Subject: [PATCH] fix: use format() to check if we support such format

---
 graphicsview.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/graphicsview.cpp b/graphicsview.cpp
index 65c477c..adbe5d7 100644
--- a/graphicsview.cpp
+++ b/graphicsview.cpp
@@ -39,8 +39,10 @@ void GraphicsView::showFileFromUrl(const QUrl &url, bool doRequestGallery)
         QImageReader imageReader(filePath);
         imageReader.setAutoTransform(true);
         imageReader.setDecideFormatFromContent(true);
-        QImage::Format imageFormat = imageReader.imageFormat();
-        if (imageFormat == QImage::Format_Invalid) {
+        // Since if the image format / plugin does not support this feature, imageFormat() will returns an invalid format.
+        // So we cannot use imageFormat() and check if it returns QImage::Format_Invalid to detect if we support the file.
+        // QImage::Format imageFormat = imageReader.imageFormat();
+        if (imageReader.format().isEmpty()) {
             showText(tr("File is not a valid image"));
         } else {
             showImage(QPixmap::fromImageReader(&imageReader));