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264 lines
11 KiB
C#
264 lines
11 KiB
C#
#region License
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//
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// The Open Toolkit Library License
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//
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// Copyright (c) 2006 - 2010 the Open Toolkit library.
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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 to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do
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// 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 all
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// 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,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using OpenTK.Input;
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namespace OpenTK.Platform.X11
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{
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// Todo: multi-mouse support. Right now we aggregate all data into a single mouse device.
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// This should be easy: just read the device id and route the data to the correct device.
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sealed class XI2Mouse : IMouseDriver2
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{
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List<MouseState> mice = new List<MouseState>();
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Dictionary<int, int> rawids = new Dictionary<int, int>(); // maps raw ids to mouse ids
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internal readonly X11WindowInfo window;
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static int XIOpCode;
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static readonly Functions.EventPredicate PredicateImpl = IsEventValid;
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readonly IntPtr Predicate = Marshal.GetFunctionPointerForDelegate(PredicateImpl);
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// Store information on a mouse warp event, so it can be ignored.
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struct MouseWarp : IEquatable<MouseWarp>
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{
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public MouseWarp(double x, double y) { X = x; Y = y; }
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double X, Y;
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public bool Equals(MouseWarp warp) { return X == warp.X && Y == warp.Y; }
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}
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MouseWarp? mouse_warp_event;
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int mouse_warp_event_count;
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public XI2Mouse()
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{
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Debug.WriteLine("Using XI2Mouse.");
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using (new XLock(API.DefaultDisplay))
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{
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window = new X11WindowInfo();
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window.Display = API.DefaultDisplay;
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window.Screen = Functions.XDefaultScreen(window.Display);
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window.RootWindow = Functions.XRootWindow(window.Display, window.Screen);
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window.WindowHandle = window.RootWindow;
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}
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if (!IsSupported(window.Display))
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throw new NotSupportedException("XInput2 not supported.");
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using (XIEventMask mask = new XIEventMask(1, XIEventMasks.RawButtonPressMask |
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XIEventMasks.RawButtonReleaseMask | XIEventMasks.RawMotionMask))
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{
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Functions.XISelectEvents(window.Display, window.WindowHandle, mask);
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Functions.XISelectEvents(window.Display, window.RootWindow, mask);
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}
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}
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// Checks whether XInput2 is supported on the specified display.
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// If a display is not specified, the default display is used.
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internal static bool IsSupported(IntPtr display)
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{
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if (display == IntPtr.Zero)
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display = API.DefaultDisplay;
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using (new XLock(display))
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{
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int major, ev, error;
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if (Functions.XQueryExtension(display, "XInputExtension", out major, out ev, out error) == 0)
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{
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return false;
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}
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XIOpCode = major;
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}
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return true;
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}
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#region IMouseDriver2 Members
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public MouseState GetState()
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{
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ProcessEvents();
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MouseState master = new MouseState();
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foreach (MouseState ms in mice)
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{
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master.MergeBits(ms);
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}
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return master;
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}
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public MouseState GetState(int index)
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{
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ProcessEvents();
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if (mice.Count > index)
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return mice[index];
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else
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return new MouseState();
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}
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public void SetPosition(double x, double y)
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{
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using (new XLock(window.Display))
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{
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Functions.XWarpPointer(window.Display,
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IntPtr.Zero, window.RootWindow, 0, 0, 0, 0, (int)x, (int)y);
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// Mark the expected warp-event so it can be ignored.
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if (mouse_warp_event == null)
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mouse_warp_event_count = 0;
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mouse_warp_event_count++;
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mouse_warp_event = new MouseWarp((int)x, (int)y);
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}
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ProcessEvents();
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}
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#endregion
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bool CheckMouseWarp(double x, double y)
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{
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// Check if a mouse warp with the specified destination exists.
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bool is_warp =
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mouse_warp_event.HasValue &&
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mouse_warp_event.Value.Equals(new MouseWarp((int)x, (int)y));
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if (is_warp && --mouse_warp_event_count <= 0)
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mouse_warp_event = null;
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return is_warp;
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}
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void ProcessEvents()
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{
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while (true)
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{
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XEvent e = new XEvent();
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XGenericEventCookie cookie;
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using (new XLock(window.Display))
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{
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if (!Functions.XCheckIfEvent(window.Display, ref e, Predicate, new IntPtr(XIOpCode)))
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return;
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cookie = e.GenericEventCookie;
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if (Functions.XGetEventData(window.Display, ref cookie) != 0)
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{
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XIRawEvent raw = (XIRawEvent)
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Marshal.PtrToStructure(cookie.data, typeof(XIRawEvent));
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if (!rawids.ContainsKey(raw.deviceid))
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{
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mice.Add(new MouseState());
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rawids.Add(raw.deviceid, mice.Count - 1);
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}
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MouseState state = mice[rawids[raw.deviceid]];
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switch (raw.evtype)
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{
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case XIEventType.RawMotion:
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double x = 0, y = 0;
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if (IsBitSet(raw.valuators.mask, 0))
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{
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x = BitConverter.Int64BitsToDouble(Marshal.ReadInt64(raw.raw_values, 0));
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}
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if (IsBitSet(raw.valuators.mask, 1))
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{
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y = BitConverter.Int64BitsToDouble(Marshal.ReadInt64(raw.raw_values, 8));
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}
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if (!CheckMouseWarp(x, y))
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{
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state.X += (int)x;
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state.Y += (int)y;
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}
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break;
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case XIEventType.RawButtonPress:
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switch (raw.detail)
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{
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case 1: state.EnableBit((int)MouseButton.Left); break;
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case 2: state.EnableBit((int)MouseButton.Middle); break;
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case 3: state.EnableBit((int)MouseButton.Right); break;
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case 4: state.WheelPrecise++; break;
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case 5: state.WheelPrecise--; break;
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case 6: state.EnableBit((int)MouseButton.Button1); break;
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case 7: state.EnableBit((int)MouseButton.Button2); break;
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case 8: state.EnableBit((int)MouseButton.Button3); break;
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case 9: state.EnableBit((int)MouseButton.Button4); break;
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case 10: state.EnableBit((int)MouseButton.Button5); break;
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case 11: state.EnableBit((int)MouseButton.Button6); break;
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case 12: state.EnableBit((int)MouseButton.Button7); break;
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case 13: state.EnableBit((int)MouseButton.Button8); break;
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case 14: state.EnableBit((int)MouseButton.Button9); break;
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}
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break;
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case XIEventType.RawButtonRelease:
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switch (raw.detail)
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{
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case 1: state.DisableBit((int)MouseButton.Left); break;
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case 2: state.DisableBit((int)MouseButton.Middle); break;
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case 3: state.DisableBit((int)MouseButton.Right); break;
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case 6: state.DisableBit((int)MouseButton.Button1); break;
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case 7: state.DisableBit((int)MouseButton.Button2); break;
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case 8: state.DisableBit((int)MouseButton.Button3); break;
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case 9: state.DisableBit((int)MouseButton.Button4); break;
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case 10: state.DisableBit((int)MouseButton.Button5); break;
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case 11: state.DisableBit((int)MouseButton.Button6); break;
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case 12: state.DisableBit((int)MouseButton.Button7); break;
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case 13: state.DisableBit((int)MouseButton.Button8); break;
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case 14: state.DisableBit((int)MouseButton.Button9); break;
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}
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break;
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}
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mice[rawids[raw.deviceid]] = state;
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}
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Functions.XFreeEventData(window.Display, ref cookie);
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}
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}
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}
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static bool IsEventValid(IntPtr display, ref XEvent e, IntPtr arg)
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{
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return e.GenericEventCookie.extension == arg.ToInt32() &&
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(e.GenericEventCookie.evtype == (int)XIEventType.RawMotion ||
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e.GenericEventCookie.evtype == (int)XIEventType.RawButtonPress ||
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e.GenericEventCookie.evtype == (int)XIEventType.RawButtonRelease);
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}
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static bool IsBitSet(IntPtr mask, int bit)
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{
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unsafe
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{
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return (*((byte*)mask + (bit >> 3)) & (1 << (bit & 7))) != 0;
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}
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}
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}
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}
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