diff options
| author | Gonzalo Odiard <godiard@gmail.com> | 2012-10-01 20:15:35 (GMT) |
|---|---|---|
| committer | Agustin Zubiaga <aguz@sugarlabs.org> | 2012-10-02 03:24:05 (GMT) |
| commit | ecb1f86526376bd8ddad004c50a157b1d0d2fb5b (patch) | |
| tree | 5043dd7554417cb6a57906f0695275d914008f2e /ImageView.py | |
| parent | e7f0e684a48ce1a7ad076e31ab3c7a068dbb50c1 (diff) | |
Use similar surface to improve performance
Signed-off-by: Gonzalo Odiard <gonzalo@laptop.org>
Signed-off-by: Agustin Zubiaga <aguz@sugarlabs.org>
Diffstat (limited to 'ImageView.py')
| -rw-r--r-- | ImageView.py | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/ImageView.py b/ImageView.py index d73965d..cbfa560 100644 --- a/ImageView.py +++ b/ImageView.py @@ -100,7 +100,16 @@ class ImageViewer(Gtk.DrawingArea): logging.debug('ImageViewer.draw start') if self.surface is None: - return + if self.file_location is None: + return + + # http://cairographics.org/gdkpixbufpycairo/ + pixbuf = GdkPixbuf.Pixbuf.new_from_file(self.file_location) + self.surface = ctx.get_target().create_similar( + cairo.CONTENT_COLOR_ALPHA, pixbuf.get_width(), + pixbuf.get_height()) + ctx_surface = cairo.Context(self.surface) + self._pixbuf_to_context(pixbuf, ctx_surface) if self.zoom is None: self.zoom = self._calc_optimal_zoom() @@ -176,14 +185,6 @@ class ImageViewer(Gtk.DrawingArea): def set_file_location(self, file_location): logging.debug('Loading image from: %s', file_location) - # http://cairographics.org/gdkpixbufpycairo/ - pixbuf = GdkPixbuf.Pixbuf.new_from_file(file_location) - - self.surface = cairo.ImageSurface( - cairo.FORMAT_ARGB32, pixbuf.get_width(), pixbuf.get_height()) - ctx = cairo.Context(self.surface) - self._pixbuf_to_context(pixbuf, ctx) - self.file_location = file_location self.zoom = None self.queue_draw() |