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Viewing changes to external/xwt/Xwt.Gtk/Xwt.GtkBackend/ImageHandler.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/xwt/Xwt.Gtk/Xwt.GtkBackend/ImageHandler.cs
 
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// 
 
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// ImageHandler.cs
 
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//  
 
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// Author:
 
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//       Lluis Sanchez <lluis@xamarin.com>
 
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// 
 
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// Copyright (c) 2011 Xamarin Inc
 
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// 
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy
 
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// of this software and associated documentation files (the "Software"), to deal
 
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// in the Software without restriction, including without limitation the rights
 
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 
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// copies of the Software, and to permit persons to whom the Software is
 
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// furnished to do so, subject to the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be included in
 
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// all copies or substantial portions of the Software.
 
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// 
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 
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// THE SOFTWARE.
 
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using System;
 
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using Xwt.Backends;
 
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namespace Xwt.GtkBackend
 
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{
 
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        public class ImageHandler: ImageBackendHandler
 
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        {
 
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                public override object LoadFromStream (System.IO.Stream stream)
 
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                {
 
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                        using (Gdk.PixbufLoader loader = new Gdk.PixbufLoader (stream))
 
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                                return loader.Pixbuf;
 
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                }
 
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                public override object LoadFromIcon (string id, IconSize size)
 
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                {
 
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                        string stockId = Util.ToGtkStock (id);
 
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                        var gsize = Util.ToGtkSize (size);
 
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                        Gtk.IconSet iconset = Gtk.IconFactory.LookupDefault (stockId);
 
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                        if (iconset != null) 
 
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                                return iconset.RenderIcon (Gtk.Widget.DefaultStyle, Gtk.TextDirection.Ltr, Gtk.StateType.Normal, gsize, null, null);
 
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                        if (Gtk.IconTheme.Default.HasIcon (stockId)) {
 
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                                int w, h;
 
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                                Gtk.Icon.SizeLookup (gsize, out w, out h);
 
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                                Gdk.Pixbuf result = Gtk.IconTheme.Default.LoadIcon (stockId, h, (Gtk.IconLookupFlags)0);
 
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                                return result;
 
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                        }
 
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                        return null;
 
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                }
 
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                public override void SetPixel (object handle, int x, int y, Xwt.Drawing.Color color)
 
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                {
 
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                        var pix = (Gdk.Pixbuf)handle;
 
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                        unsafe {
 
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                                byte* p = (byte*) pix.Pixels;
 
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                                p += y * pix.Rowstride + x * pix.NChannels;
 
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                                p[0] = (byte)(color.Red * 255);
 
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                                p[1] = (byte)(color.Green * 255);
 
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                                p[2] = (byte)(color.Blue * 255);
 
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                                p[3] = (byte)(color.Alpha * 255);
 
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                        }
 
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                }
 
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                public override Xwt.Drawing.Color GetPixel (object handle, int x, int y)
 
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                {
 
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                        var pix = (Gdk.Pixbuf)handle;
 
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                        unsafe {
 
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                                byte* p = (byte*) pix.Pixels;
 
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                                p += y * pix.Rowstride + x * pix.NChannels;
 
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                                return Xwt.Drawing.Color.FromBytes (p[0], p[1], p[2], p[3]);
 
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                        }
 
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                }
 
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                public override void Dispose (object backend)
 
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                {
 
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                        ((Gdk.Pixbuf)backend).Dispose ();
 
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                }
 
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                public override Size GetSize (object handle)
 
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                {
 
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                        var pix = (Gdk.Pixbuf)handle;
 
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                        return new Size (pix.Width, pix.Height);
 
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                }
 
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                public override object Resize (object handle, double width, double height)
 
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                {
 
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                        var pix = (Gdk.Pixbuf)handle;
 
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                        return pix.ScaleSimple ((int)width, (int)height, Gdk.InterpType.Bilinear);
 
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                }
 
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                public override object Copy (object handle)
 
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                {
 
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                        var pix = (Gdk.Pixbuf)handle;
 
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                        return pix.Copy ();
 
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                }
 
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                public override void CopyArea (object srcHandle, int srcX, int srcY, int width, int height, object destHandle, int destX, int destY)
 
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                {
 
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                        var pixSrc = (Gdk.Pixbuf)srcHandle;
 
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                        var pixDst = (Gdk.Pixbuf)destHandle;
 
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                        pixSrc.CopyArea (srcX, srcY, width, height, pixDst, destX, destY);
 
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                }
 
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                public override object Crop (object handle, int srcX, int srcY, int width, int height)
 
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                {
 
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                        var pix = (Gdk.Pixbuf)handle;
 
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                        Gdk.Pixbuf res = new Gdk.Pixbuf (pix.Colorspace, pix.HasAlpha, pix.BitsPerSample, width, height);
 
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                        res.Fill (0);
 
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                        pix.CopyArea (srcX, srcY, width, height, res, 0, 0);
 
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                        return res;
 
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                }
 
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                public override object ChangeOpacity (object backend, double opacity)
 
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                {
 
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                        Gdk.Pixbuf image = (Gdk.Pixbuf) backend;
 
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                        Gdk.Pixbuf result = image.Copy ();
 
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                        result.Fill (0);
 
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                        result = result.AddAlpha (true, 0, 0, 0);
 
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                        image.Composite (result, 0, 0, image.Width, image.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, (int)(255 * opacity));
 
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                        return result;
 
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                }
 
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        }
 
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}
 
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