1 files changed, 86 insertions, 0 deletions
diff --git a/plugins/shotwell-transitions/CirclesEffect.vala b/plugins/shotwell-transitions/CirclesEffect.vala
new file mode 100644
index 0000000..b01e06f
--- /dev/null
+++ b/plugins/shotwell-transitions/CirclesEffect.vala
@@ -0,0 +1,86 @@
+/* Copyright 2013 Jens Bav
+ * Copyright 2011-2014 Yorba Foundation
+ *
+ * This software is licensed under the GNU Lesser General Public License
+ * (version 2.1 or later).  See the COPYING file in this distribution.
+ */
+
+using Spit;
+
+private class CirclesEffectDescriptor : ShotwellTransitionDescriptor {
+    public CirclesEffectDescriptor(GLib.File resource_directory) {
+        base(resource_directory);
+    }
+
+    public override unowned string get_id() {
+        return "org.yorba.shotwell.transitions.circles";
+    }
+
+    public override unowned string get_pluggable_name() {
+        return _("Circles");
+    }
+
+    public override Transitions.Effect create(HostInterface host) {
+        return new CirclesEffect();
+    }
+}
+
+private class CirclesEffect : Object, Transitions.Effect {
+    private const int DESIRED_FPS = 25;
+    private const int MIN_FPS = 15;
+    private const double SPEED = 2.5;
+
+    public CirclesEffect() {
+    }
+
+    public void get_fps(out int desired_fps, out int min_fps) {
+        desired_fps = CirclesEffect.DESIRED_FPS;
+        min_fps = CirclesEffect.MIN_FPS;
+    }
+
+    public void start(Transitions.Visuals visuals, Transitions.Motion motion) {
+    }
+
+    public bool needs_clear_background() {
+        return true;
+    }
+
+    public void paint(Transitions.Visuals visuals, Transitions.Motion motion, Cairo.Context ctx,
+        int width, int height, int frame_number) {
+        double alpha = motion.get_alpha(frame_number);
+        int distance = 60, radius;
+        int circleCountX = width / (2 * distance);
+        int circleCountY = height / distance;
+        double maxRadius = SPEED * distance;
+        
+        if (visuals.from_pixbuf != null) {
+            Gdk.cairo_set_source_pixbuf(ctx, visuals.from_pixbuf, visuals.from_pos.x,
+                visuals.from_pos.y);
+            ctx.paint_with_alpha(1 - alpha);
+        }
+        
+        if (visuals.to_pixbuf != null) {
+            Gdk.cairo_set_source_pixbuf(ctx, visuals.to_pixbuf,visuals.to_pos.x, visuals.to_pos.y);
+            
+            for(int y = 0; y <= circleCountY; y++){
+                for(int x = 0; x <= circleCountX; x++){
+                    radius = (int) (Math.fmax(0,Math.fmin(1, alpha-((double) (x + y)/(double)
+                        ((circleCountY + circleCountX) * SPEED)))) * maxRadius);
+                    ctx.arc(2 * distance * x, 2 * distance * y, radius, 0, 2 * Math.PI);
+                    ctx.fill();
+                }
+            }
+            
+            ctx.clip();
+            ctx.paint_with_alpha(alpha);
+        }
+
+
+    }
+
+    public void advance(Transitions.Visuals visuals, Transitions.Motion motion, int frame_number) {
+    }
+
+    public void cancel() {
+    }
+}