Add different background image modes

stretch_and_fill, scale_and_fit, scale_and_crop, tiling

terminatorlib/config.py

@@ -216,6 +216,7 @@ DEFAULTS = {
                 'background_darkness'   : 0.5,
                 'background_type'       : 'solid',
                 'background_image'      : '',
+                'background_image_mode' : 'stretch_and_fill',
                 'backspace_binding'     : 'ascii-del',
                 'delete_binding'        : 'escape-sequence',
                 'color_scheme'          : 'grey_on_black',

terminatorlib/terminal.py

@@ -1135,17 +1135,35 @@ class Terminal(Gtk.VBox):
 
         # save cairo context
         cr.save()
+
         # draw background image
+        image_mode = self.config['background_image_mode']
+
         rect = self.vte.get_allocation()
         xratio = float(rect.width) / float(self.background_image.get_width())
         yratio = float(rect.height) / float(self.background_image.get_height())
+        if image_mode == 'stretch_and_fill':
             cr.scale(xratio, yratio)
+        elif image_mode == 'scale_and_fit':
+            ratio = min(xratio, yratio)
+            cr.scale(ratio, ratio)
+        elif image_mode == 'scale_and_crop':
+            ratio = max(xratio, yratio)
+            cr.scale(ratio, ratio)
+
+        # TODO add image alignment
+
         cr.set_source_surface(self.background_image)
         cr.get_source().set_filter(cairo.Filter.FAST)
+        if image_mode == 'tiling':
+            cr.get_source().set_extend(cairo.Extend.REPEAT)
+
         cr.paint()
+
         # draw transparent monochrome layer
         Gdk.cairo_set_source_rgba(cr, self.bgcolor)
         cr.paint()
+
         # restore cairo context
         cr.restore()