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SoftFocusEditor.cs

/*
 * SoftFocusEditor.cs
 *
 * Author(s)
 *    Ruben Vermeersch <ruben@savanne.be>
 *    Stephane Delcroix <stephane@delcroix.org>
 *
 * Copyright (c) 2009 Stephane Delcroix
 *
 * This is open source software. See COPYING for details.
 */

using System;
using Mono.Unix;
using Cairo;
using Gdk;
using Gtk;

using FSpot.Widgets;




namespace FSpot.Editors
{
      // TODO: This had a keybinding e. Maybe we should add it back, but did people even knew it?
      class SoftFocusEditor : Editor
      {
            double radius;
            Scale scale;

            public SoftFocusEditor () : base (Catalog.GetString ("Soft Focus"), "filter-soft-focus")
            {
                  // FIXME: need tooltip Catalog.GetString ("Create a soft focus visual effect")
                  HasSettings = true;
            }

            public override Widget ConfigurationWidget ()
            {
                  scale = new HScale (0, 1, .01);
                  scale.Value = 0.5;
                  scale.ValueChanged += HandleValueChanged;
                  return scale;
            }


            protected override Pixbuf Process (Pixbuf input, Cms.Profile input_profile) {
                  return ProcessImpl (input, input_profile, false);
            }

            protected override Pixbuf ProcessFast (Pixbuf input, Cms.Profile input_profile)
            {
                  return ProcessImpl (input, input_profile, true);
            }


            private Pixbuf ProcessImpl (Pixbuf input, Cms.Profile input_profile, bool fast) {
                  Pixbuf result;
                  using (ImageInfo info = new ImageInfo (input)) {
                        using (Widgets.SoftFocus soft = new Widgets.SoftFocus (info)) {
                              soft.Radius = radius;
      
                              using (MemorySurface surface = new MemorySurface (Format.Argb32,
                                                               input.Width,
                                                               input.Height)) {
      
                                    using (Context ctx = new Context (surface)) {
                                          soft.Apply (ctx, info.Bounds);
                                    }

                                    result = MemorySurface.CreatePixbuf (surface);
                                    surface.Flush ();
                              }
                        }
                  }
                  return result;
            }

            private void HandleValueChanged (object sender, System.EventArgs args)
            {
                  radius = scale.Value;
                  UpdatePreview ();
            }
      }
}

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