diff --git a/app/advancedconfigpage.ui b/app/advancedconfigpage.ui
--- a/app/advancedconfigpage.ui
+++ b/app/advancedconfigpage.ui
@@ -26,7 +26,7 @@
-
- Delete thumbnail cache folder on exit
+ Low resource usage mode
@@ -48,7 +48,7 @@
-
- Enable this option if you do not have a lot of disk space.<br/><br/><em>Be careful:</em> this will delete the folder named <filename>.thumbnails</filename> in your home folder, deleting all thumbnails previously generated by Gwenview and other applications.
+ Enable this option if you do not have a lot of disk space. This will avoid storing thumbnails on disk and will prefer embedded thumbnails of lower quality that are faster to load, if available.<br/><br/><em>Be careful:</em> this will delete the folder named <filename>.thumbnails</filename> in your home folder, deleting all thumbnails previously generated by Gwenview and other applications.
true
diff --git a/doc/index.docbook b/doc/index.docbook
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -846,7 +846,7 @@
Cache
- Enable the Delete thumbnail cache folder on exit option if you do not have a lot of disk space.
+ Enable the Low resource usage mode option if you do not have a lot of disk space. This will avoid storing thumbnails on disk and will prefer embedded thumbnails of lower quality that are faster to load, if available.
Be careful: This will delete the folder named .thumbnails in your home folder, deleting all thumbnails previously generated by &gwenview; and other applications.
diff --git a/lib/thumbnailprovider/thumbnailgenerator.cpp b/lib/thumbnailprovider/thumbnailgenerator.cpp
--- a/lib/thumbnailprovider/thumbnailgenerator.cpp
+++ b/lib/thumbnailprovider/thumbnailgenerator.cpp
@@ -119,7 +119,11 @@
if (!content.rawData().isEmpty()) {
QImage thumbnail = content.thumbnail();
- if (qMax(thumbnail.width(), thumbnail.height()) >= pixelSize) {
+ // If the user does not care about the generated thumbnails (by deleting them on exit), use ANY
+ // embedded thumnail, even if it's too small.
+ if (!thumbnail.isNull() &&
+ (GwenviewConfig::deleteThumbnailCacheOnExit() || qMax(thumbnail.width(), thumbnail.height()) >= pixelSize)
+ ) {
mImage = std::move(thumbnail);
mOriginalWidth = content.size().width();
mOriginalHeight = content.size().height();