From 7a9135c8e5687d74e4418f42c1601424ebc963af Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 17 May 2010 11:18:31 -0600
Subject: [PATCH] Support loading of device images from paths instead of
 keeping them in memory

---
 src/calibre/devices/interface.py | 4 +++-
 src/calibre/gui2/library.py      | 7 +++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/calibre/devices/interface.py b/src/calibre/devices/interface.py
index 356ebfc876..40cac4d615 100644
--- a/src/calibre/devices/interface.py
+++ b/src/calibre/devices/interface.py
@@ -380,7 +380,9 @@ class BookList(list):
       3. size (file size of the book)
       4. datetime (a UTC time tuple)
       5. path (path on the device to the book)
-      6. thumbnail (can be None)
+      6. thumbnail (can be None) thumbnail is either a str/bytes object with the
+         image data or it should have an attribute image_path that stores an
+         absolute (platform native) path to the image
       7. tags (a list of strings, can be empty).
     '''
 
diff --git a/src/calibre/gui2/library.py b/src/calibre/gui2/library.py
index d08c7d50c8..0c6f7566bd 100644
--- a/src/calibre/gui2/library.py
+++ b/src/calibre/gui2/library.py
@@ -1418,9 +1418,12 @@ class DeviceBooksModel(BooksModel):
         data = {}
         item = self.db[self.map[current.row()]]
         cdata = item.thumbnail
-        if cdata:
+        if cdata is not None:
             img = QImage()
-            img.loadFromData(cdata)
+            if hasattr(cdata, 'image_path'):
+                img.load(cdata.image_path)
+            else:
+                img.loadFromData(cdata)
             if img.isNull():
                 img = self.default_image
             data['cover'] = img