Remove case sensitivity regarding preview file extensions

That means ".dds" and ".DDS" should be treated the same.

3 files changed, 4 insertions, 3 deletions

diff --git a/src/filetree.cpp b/src/filetree.cpp
index f46216b5..e0cda6b0 100644
--- a/src/filetree.cpp
+++ b/src/filetree.cpp
@@ -261,7 +261,7 @@ void FileTree::activate(FileTreeItem* item)
 
   if (tryPreview) {
     const QFileInfo fi(item->realPath());
-    if (m_plugins.previewGenerator().previewSupported(fi.suffix())) {
+    if (m_plugins.previewGenerator().previewSupported(fi.suffix().toLower())) {
       preview(item);
       return;
     }
diff --git a/src/modinfodialog.cpp b/src/modinfodialog.cpp
index f50d7024..fc83bf11 100644
--- a/src/modinfodialog.cpp
+++ b/src/modinfodialog.cpp
@@ -48,7 +48,7 @@ bool canPreviewFile(
     return false;
   }
 
-  const auto ext = QFileInfo(filename).suffix();
+  const auto ext = QFileInfo(filename).suffix().toLower();
   return pluginContainer.previewGenerator().previewSupported(ext);
 }
 
diff --git a/src/modinfodialogimages.cpp b/src/modinfodialogimages.cpp
index 8a22045e..f902cb7e 100644
--- a/src/modinfodialogimages.cpp
+++ b/src/modinfodialogimages.cpp
@@ -254,7 +254,8 @@ void ImagesTab::select(std::size_t i, Visibility v)
 
     ui->imagesPath->setText(QDir::toNativeSeparators(f->path()));
     ui->imagesExplore->setEnabled(true);
-    if (plugin().previewGenerator().previewSupported(QString::fromStdWString(std::filesystem::path(f->path().toStdWString()).extension().wstring()).remove(0,1)))
+    QString extension = QString::fromStdWString(std::filesystem::path(f->path().toStdWString()).extension().wstring()).remove(0,1).toLower();
+    if (plugin().previewGenerator().previewSupported(extension))
       ui->previewPluginButton->setEnabled(true);
     else
       ui->previewPluginButton->setEnabled(false);