layer move: blank tiles during & after drag

[mypaint-anime/master.git] / lib / layer.py

diff --git a/lib/layer.py b/lib/layer.py
index b839192..8c3a1f7 100644 (file)
--- a/lib/layer.py
+++ b/lib/layer.py
@@ -81,12 +81,12 @@ class Layer:
         self.strokes = [] # contains StrokeShape instances (not stroke.Stroke)
         self._surface.clear()
 
-    def load_from_pixbuf(self, pixbuf):
+    def load_from_surface(self, surface):
         self.strokes = []
-        self._surface.load_from_data(pixbuf)
+        self._surface.load_from_surface(surface)
 
     def render_as_pixbuf(self, *rect, **kwargs):
-        self._surface.render_as_pixbuf(*rect, **kwargs)
+        return self._surface.render_as_pixbuf(*rect, **kwargs)
 
     def save_snapshot(self):
         return (self.strokes[:], self._surface.save_snapshot(), self.opacity)
@@ -96,6 +96,22 @@ class Layer:
         self.strokes = strokes[:]
         self._surface.load_snapshot(data)
 
+
+    def translate(self, dx, dy):
+        """Translate a layer non-interactively.
+        """
+        move = self.get_move(0, 0)
+        move.update(dx, dy)
+        move.process(n=-1)
+        move.cleanup()
+
+
+    def get_move(self, x, y):
+        """Get a translation/move object for this layer.
+        """
+        return self._surface.get_move(x, y)
+
+
     def add_stroke(self, stroke, snapshot_before):
         before = snapshot_before[1] # extract surface snapshot
         after  = self._surface.save_snapshot()
@@ -104,6 +120,7 @@ class Layer:
         shape.brush_string = stroke.brush_settings
         self.strokes.append(shape)
 
+
     def save_strokemap_to_file(self, f, translate_x, translate_y):
         brush2id = {}
         for stroke in self.strokes: