仿真平台内核初版 -tlib库 包含<sparc arm riscv powerPC>

lib/termsharp/xwt/Xwt.Gtk.Mac/GtkMacDesktopBackend.cs

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+//
+// GtkMacDesktopBackend.cs
+//
+// Author:
+//       Lluis Sanchez Gual <lluis@xamarin.com>
+//
+// Copyright (c) 2014 Xamarin, Inc (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using Xwt.GtkBackend;
+using AppKit;
+using System.Drawing;
+using System.IO;
+using GTK = global::Gtk;
+using CoreGraphics;
+
+namespace Xwt.Gtk.Mac
+{
+	public class GtkMacDesktopBackend: GtkDesktopBackend
+	{
+		public static Gdk.Pixbuf GetPixbufFromNSImage (NSImage icon, int width, int height)
+		{
+			var rect = new CGRect (0, 0, width, height);
+
+			var rep = icon.BestRepresentation (rect, null, null);
+			var bitmap = rep as NSBitmapImageRep;
+			try {
+				if (bitmap == null) {
+					if (rep != null)
+						rep.Dispose ();
+					using (var cgi = icon.AsCGImage (ref rect, null, null)) {
+						if (cgi == null)
+							return null;
+						bitmap = new NSBitmapImageRep (cgi);
+					}
+				}
+				return GetPixbufFromNSBitmapImageRep (bitmap, width, height);
+			} finally {
+				if (bitmap != null)
+					bitmap.Dispose ();
+			}
+		}
+
+		static Gdk.Pixbuf GetPixbufFromNSBitmapImageRep (NSBitmapImageRep bitmap, int width, int height)
+		{
+			byte[] data;
+			using (var tiff = bitmap.TiffRepresentation) {
+				data = new byte[tiff.Length];
+				System.Runtime.InteropServices.Marshal.Copy (tiff.Bytes, data, 0, data.Length);
+			}
+
+			int pw = (int)bitmap.PixelsWide, ph = (int)bitmap.PixelsHigh;
+			var pixbuf = new Gdk.Pixbuf (data, pw, ph);
+
+			// if one dimension matches, and the other is same or smaller, use as-is
+			if ((pw == width && ph <= height) || (ph == height && pw <= width))
+				return pixbuf;
+
+			// otherwise scale proportionally such that the largest dimension matches the desired size
+			if (pw == ph) {
+				pw = width;
+				ph = height;
+			} else if (pw > ph) {
+				ph = (int) (width * ((float) ph / pw));
+				pw = width;
+			} else {
+				pw = (int) (height * ((float) pw / ph));
+				ph = height;
+			}
+
+			var scaled = pixbuf.ScaleSimple (pw, ph, Gdk.InterpType.Bilinear);
+			pixbuf.Dispose ();
+
+			return scaled;
+		}
+
+		public override object GetFileIcon (string filename)
+		{
+			NSImage icon = null;
+
+			if (Path.IsPathRooted (filename) && File.Exists (filename)) {
+				icon = NSWorkspace.SharedWorkspace.IconForFile (filename);
+			} else {
+				string extension = Path.GetExtension (filename);
+				if (!string.IsNullOrEmpty (extension))
+					icon = NSWorkspace.SharedWorkspace.IconForFileType (extension);
+			}
+
+			if (icon == null) {
+				return base.GetFileIcon (filename);
+			}
+
+			int w, h;
+			if (!GTK.Icon.SizeLookup (GTK.IconSize.Menu, out w, out h)) {
+				w = h = 22;
+			}
+
+			var res = GetPixbufFromNSImage (icon, w, h);
+			return res != null ? new GtkImage (res) : base.GetFileIcon (filename);
+		}
+	}
+}
+