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460 lines
15 KiB
C#
460 lines
15 KiB
C#
#region --- License ---
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/* Licensed under the MIT/X11 license.
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* Copyright (c) 2006-2008 the OpenTK team.
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* This notice may not be removed.
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* See license.txt for licensing detailed licensing details.
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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.Text;
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using System.Diagnostics;
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using System.Threading;
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using System.Drawing;
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namespace OpenTK
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{
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/// <summary>
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/// Defines a display device on the underlying system, and provides
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/// methods to query and change its display parameters.
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/// </summary>
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public class DisplayDevice
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{
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// TODO: Add support for refresh rate queries and switches.
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// TODO: Check whether bits_per_pixel works correctly under Mono/X11.
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// TODO: Add properties that describe the 'usable' size of the Display, i.e. the maximized size without the taskbar etc.
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// TODO: Does not detect changes to primary device.
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// TODO: Mono does not support System.Windows.Forms.Screen.BitsPerPixel -- find workaround!
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#region --- Fields ---
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DisplayResolution current_resolution, original_resolution;
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List<DisplayResolution> available_resolutions = new List<DisplayResolution>();
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bool primary;
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static List<DisplayDevice> available_displays = new List<DisplayDevice>();
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static object display_lock = new object();
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static DisplayDevice primary_display;
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//static FadeEffect effect = new FadeEffect();
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static Platform.IDisplayDeviceDriver implementation;
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#endregion
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#region --- Constructors ---
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static DisplayDevice()
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{
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implementation = Platform.Factory.Default.CreateDisplayDeviceDriver();
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}
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internal DisplayDevice(DisplayResolution currentResolution, bool primary,
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IEnumerable<DisplayResolution> availableResolutions)
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{
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this.current_resolution = currentResolution;
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this.primary = primary;
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this.available_resolutions.AddRange(availableResolutions);
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Debug.Print("DisplayDevice {0} ({1}) supports {2} resolutions.",
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available_displays.Count, primary ? "primary" : "secondary", available_resolutions.Count);
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lock (display_lock)
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{
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available_displays.Add(this);
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if (primary)
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primary_display = this;
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}
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}
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#endregion
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#region --- Public Methods ---
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#region public Rectangle Bounds
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/// <summary>
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/// Gets a System.Drawing.Rectangle that contains the current bounds of this DisplayDevice.
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/// </summary>
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public Rectangle Bounds
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{
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get { return current_resolution.Bounds; }
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}
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#endregion
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#region public int Width
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/// <summary>Gets a System.Int32 that contains the width of this display in pixels.</summary>
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public int Width { get { return current_resolution.Width; } }
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#endregion
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#region public int Height
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/// <summary>Gets a System.Int32 that contains the height of this display in pixels.</summary>
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public int Height { get { return current_resolution.Height; } }
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#endregion
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#region public int BitsPerPixel
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/// <summary>Gets a System.Int32 that contains number of bits per pixel of this display. Typical values include 8, 16, 24 and 32.</summary>
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public int BitsPerPixel { get { return current_resolution.BitsPerPixel; } }
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#endregion
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#region public float RefreshRate
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/// <summary>
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/// Gets a System.Single representing the vertical refresh rate of this display.
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/// </summary>
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public float RefreshRate
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{
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get { return current_resolution.RefreshRate; }
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}
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#endregion
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#region public bool IsPrimary
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/// <summary>Gets a System.Boolean that indicates whether this Display is the primary Display in systems with multiple Displays.</summary>
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public bool IsPrimary { get { return primary; } }
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#endregion
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#region public DisplayResolution SelectResolution(int width, int height, int bitsPerPixel, float refreshRate)
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/// <summary>
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/// Selects an available resolution that matches the specified parameters.
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/// </summary>
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/// <param name="width">The width of the requested resolution in pixels.</param>
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/// <param name="height">The height of the requested resolution in pixels.</param>
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/// <param name="bitsPerPixel">The bits per pixel of the requested resolution.</param>
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/// <param name="refreshRate">The refresh rate of the requested resolution in Herz.</param>
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/// <returns>The requested DisplayResolution or null if the parameters cannot be met.</returns>
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/// <remarks>
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/// <para>If a matching resolution is not found, this function will retry ignoring the specified refresh rate,
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/// bits per pixel and resolution, in this order. If a matching resolution still doesn't exist, this function will
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/// return the current resolution.</para>
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/// <para>A parameter set to 0 or negative numbers will not be used in the search (e.g. if refreshRate is 0,
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/// any refresh rate will be considered valid).</para>
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/// <para>This function allocates memory.</para>
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/// </remarks>
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public DisplayResolution SelectResolution(int width, int height, int bitsPerPixel, float refreshRate)
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{
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DisplayResolution resolution = FindResolution(width, height, bitsPerPixel, refreshRate);
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if (resolution == null)
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resolution = FindResolution(width, height, bitsPerPixel, 0);
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if (resolution == null)
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resolution = FindResolution(width, height, 0, 0);
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if (resolution == null)
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return current_resolution;
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return resolution;
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}
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#endregion
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#region public DisplayResolution[] AvailableResolutions
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/// <summary>
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/// Gets an array of OpenTK.DisplayResolution objects, which describe all available resolutions
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/// for this device.
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/// </summary>
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public DisplayResolution[] AvailableResolutions
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{
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get
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{
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lock (display_lock)
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{
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return available_resolutions.ToArray();
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}
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}
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}
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#endregion
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#region public void ChangeResolution(DisplayResolution resolution)
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/// <summary>Changes the resolution of the DisplayDevice.</summary>
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/// <param name="resolution">The resolution to set. <see cref="DisplayDevice.SelectResolution"/></param>
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/// <exception cref="Graphics.GraphicsModeException">Thrown if the requested resolution could not be set.</exception>
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/// <remarks>If the specified resolution is null, this function will restore the original DisplayResolution.</remarks>
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public void ChangeResolution(DisplayResolution resolution)
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{
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if (resolution == null)
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this.RestoreResolution();
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if (resolution == current_resolution)
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return;
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//effect.FadeOut();
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if (implementation.TryChangeResolution(this, resolution))
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{
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if (original_resolution == null)
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original_resolution = current_resolution;
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current_resolution = resolution;
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}
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else throw new Graphics.GraphicsModeException(String.Format("Device {0}: Failed to change resolution to {1}.",
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this, resolution));
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//effect.FadeIn();
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}
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#endregion
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#region public void ChangeResolution(int width, int height, int bitsPerPixel, float refreshRate)
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/// <summary>Changes the resolution of the DisplayDevice.</summary>
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/// <param name="width">The new width of the DisplayDevice.</param>
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/// <param name="height">The new height of the DisplayDevice.</param>
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/// <param name="bitsPerPixel">The new bits per pixel of the DisplayDevice.</param>
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/// <param name="refreshRate">The new refresh rate of the DisplayDevice.</param>
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/// <exception cref="GraphicsModeException">Thrown if the requested resolution could not be set.</exception>
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public void ChangeResolution(int width, int height, int bitsPerPixel, float refreshRate)
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{
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this.ChangeResolution(this.SelectResolution(width, height, bitsPerPixel, refreshRate));
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}
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#endregion
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#region public void RestoreResolution()
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/// <summary>Restores the original resolution of the DisplayDevice.</summary>
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/// <exception cref="GraphicsModeException">Thrown if the original resolution could not be restored.</exception>
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public void RestoreResolution()
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{
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if (original_resolution != null)
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{
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//effect.FadeOut();
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if (implementation.TryRestoreResolution(this))
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{
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current_resolution = original_resolution;
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original_resolution = null;
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}
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else throw new Graphics.GraphicsModeException(String.Format("Device {0}: Failed to restore resolution.", this));
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//effect.FadeIn();
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}
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}
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#endregion
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#region public static DisplayDevice[] AvailableDisplays
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/// <summary>
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/// Gets an array of OpenTK.DisplayDevice objects, which describe all available display devices.
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/// </summary>
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public static DisplayDevice[] AvailableDisplays
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{
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get
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{
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lock (display_lock)
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{
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return available_displays.ToArray();
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}
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}
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}
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#endregion
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#region public static DisplayDevice Default
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/// <summary>Gets the default (primary) display of this system.</summary>
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public static DisplayDevice Default { get { return primary_display; } }
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#endregion
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#endregion
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#region --- Private Methods ---
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#region DisplayResolution FindResolution(int width, int height, int bitsPerPixel, float refreshRate)
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DisplayResolution FindResolution(int width, int height, int bitsPerPixel, float refreshRate)
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{
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return available_resolutions.Find(delegate(DisplayResolution test)
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{
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return
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((width > 0 && width == test.Width) || width == 0) &&
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((height > 0 && height == test.Height) || height == 0) &&
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((bitsPerPixel > 0 && bitsPerPixel == test.BitsPerPixel) || bitsPerPixel == 0) &&
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((refreshRate > 0 && System.Math.Abs(refreshRate - test.RefreshRate) < 1.0) || refreshRate == 0);
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});
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}
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#endregion
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#endregion
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#region --- Overrides ---
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#region public override string ToString()
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/// <summary>
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/// Returns a System.String representing this DisplayDevice.
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/// </summary>
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/// <returns>A System.String representing this DisplayDevice.</returns>
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public override string ToString()
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{
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return String.Format("{0}: {1} ({2} modes available)", IsPrimary ? "Primary" : "Secondary",
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current_resolution.ToString(), available_resolutions.Count);
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}
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#endregion
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#region public override bool Equals(object obj)
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///// <summary>Determines whether the specified DisplayDevices are equal.</summary>
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///// <param name="obj">The System.Object to check against.</param>
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///// <returns>True if the System.Object is an equal DisplayDevice; false otherwise.</returns>
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//public override bool Equals(object obj)
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//{
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// if (obj is DisplayDevice)
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// {
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// DisplayDevice dev = (DisplayDevice)obj;
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// return
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// IsPrimary == dev.IsPrimary &&
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// current_resolution == dev.current_resolution &&
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// available_resolutions.Count == dev.available_resolutions.Count;
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// }
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// return false;
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//}
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#endregion
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#region public override int GetHashCode()
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///// <summary>Returns a unique hash representing this DisplayDevice.</summary>
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///// <returns>A System.Int32 that may serve as a hash code for this DisplayDevice.</returns>
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////public override int GetHashCode()
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//{
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// return current_resolution.GetHashCode() ^ IsPrimary.GetHashCode() ^ available_resolutions.Count;
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//}
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#endregion
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#endregion
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}
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#region --- FadeEffect ---
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#if false
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class FadeEffect : IDisposable
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{
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List<Form> forms = new List<Form>();
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double opacity_step = 0.04;
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int sleep_step;
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internal FadeEffect()
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{
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foreach (Screen s in Screen.AllScreens)
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{
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Form form = new Form();
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form.ShowInTaskbar = false;
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form.StartPosition = FormStartPosition.Manual;
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form.WindowState = FormWindowState.Maximized;
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form.FormBorderStyle = FormBorderStyle.None;
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form.TopMost = true;
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form.BackColor = System.Drawing.Color.Black;
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forms.Add(form);
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}
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sleep_step = 10 / forms.Count;
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MoveToStartPositions();
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}
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void MoveToStartPositions()
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{
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int count = 0;
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foreach (Screen s in Screen.AllScreens)
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{
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// forms[count++].Location = new System.Drawing.Point(s.Bounds.X, s.Bounds.Y);
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//forms[count].Size = new System.Drawing.Size(4096, 4096);
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count++;
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}
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}
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bool FadedOut
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{
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get
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{
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bool ready = true;
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foreach (Form form in forms)
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ready = ready && form.Opacity >= 1.0;
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return ready;
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}
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}
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bool FadedIn
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{
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get
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{
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bool ready = true;
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foreach (Form form in forms)
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ready = ready && form.Opacity <= 0.0;
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return ready;
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}
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}
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internal void FadeOut()
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{
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MoveToStartPositions();
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foreach (Form form in forms)
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{
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form.Opacity = 0.0;
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form.Visible = true;
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}
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while (!FadedOut)
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{
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foreach (Form form in forms)
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{
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form.Opacity += opacity_step;
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form.Refresh();
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}
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Thread.Sleep(sleep_step);
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}
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}
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internal void FadeIn()
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{
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MoveToStartPositions();
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foreach (Form form in forms)
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form.Opacity = 1.0;
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while (!FadedIn)
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{
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foreach (Form form in forms)
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{
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form.Opacity -= opacity_step;
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form.Refresh();
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}
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Thread.Sleep(sleep_step);
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}
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foreach (Form form in forms)
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form.Visible = false;
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}
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#region IDisposable Members
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public void Dispose()
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{
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foreach (Form form in forms)
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form.Dispose();
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}
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#endregion
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}
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#endif
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#endregion
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}
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