[SNBOutput] Improve handling of comics, read screen size from profile.

src/calibre/customize/profiles.py

@@ -655,6 +655,7 @@ class BambookOutput(OutputProfile):
 
     # Screen size is a best guess
     screen_size               = (800, 600)
+    comic_screen_size         = (700, 540)
     dpi                       = 168.451
     fbase                     = 12
     fsizes                    = [10, 12, 14, 16]

src/calibre/ebooks/snb/output.py

@@ -50,6 +50,7 @@ class SNBOutput(OutputFormatPlugin):
      ])
 
     def convert(self, oeb_book, output_path, input_plugin, opts, log):
+        self.opts = opts
         # Create temp dir
         with TemporaryDirectory('_snb_output') as tdir:
             # Create stub directories
@@ -224,7 +225,10 @@ class SNBOutput(OutputFormatPlugin):
         img = Image()
         img.load(imageData)
         (x,y) = img.size
-        # TODO use the data from device profile
+        if self.opts:
+            SCREEN_Y, SCREEN_X = self.opts.output_profile.comic_screen_size
+            print SCREEN_Y, SCREEN_X
+        else:
             SCREEN_X = 540
             SCREEN_Y = 700
         # Handle big image only