Better handle thumbnail generation of extreme aspect ratio images (fixes #3794)

* Backport fix taken from ART * Enforce minimal thumbnail size of 1x1 px in two places, prevents divison by zero and empty image generation
2020-10-25 18:24:30 +01:00
parent b4f68adb64
commit 1318935a87
11 changed files with 82 additions and 57 deletions
--- a/rtgui/thumbbrowserentrybase.h
+++ b/rtgui/thumbbrowserentrybase.h
@@ -59,7 +59,7 @@ protected:

    MyRWMutex lockRW;  // Locks access to all image thumb changing actions

-    guint8* preview;  // holds the preview image. used in updateBackBuffer. TODO Olli: Make a cache to reduce mem significantly
+    std::vector<guint8> preview;  // holds the preview image. used in updateBackBuffer.

    Glib::ustring dispname;