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/* Copyright 2013 Jens Bav
* Copyright 2011-2015 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 SquaresEffectDescriptor : ShotwellTransitionDescriptor {
public SquaresEffectDescriptor(GLib.File resource_directory) {
base(resource_directory);
}
public override unowned string get_id() {
return "org.yorba.shotwell.transitions.squares";
}
public override unowned string get_pluggable_name() {
return _("Squares");
}
public override Transitions.Effect create(HostInterface host) {
return new SquaresEffect();
}
}
private class SquaresEffect : Object, Transitions.Effect {
private const int DESIRED_FPS = 25;
private const int MIN_FPS = 10;
private const int SQUARE_SIZE = 100;
private double square_count_x;
private double square_count_y;
public SquaresEffect() {
}
public void get_fps(out int desired_fps, out int min_fps) {
desired_fps = SquaresEffect.DESIRED_FPS;
min_fps = SquaresEffect.MIN_FPS;
}
public void start(Transitions.Visuals visuals, Transitions.Motion motion) {
square_count_x = visuals.to_pos.width/SQUARE_SIZE + 1;
square_count_y = visuals.to_pos.height/SQUARE_SIZE + 1;
}
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);
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 (double y = 0; y<=square_count_y; y++) {
for (double x = 0; x <=square_count_x; x++) {
double size = SQUARE_SIZE * (Math.fmin(1, alpha + ((square_count_x - x)
/ square_count_x + (square_count_y - y)/square_count_y)/2.5));
ctx.rectangle(visuals.to_pos.x + x * SQUARE_SIZE, visuals.to_pos.y + y
* SQUARE_SIZE, size, size);
ctx.fill();
}
}
ctx.clip();
ctx.paint_with_alpha(alpha);
}
}
public void advance(Transitions.Visuals visuals, Transitions.Motion motion, int frame_number) {
}
public void cancel() {
}
}
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