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DisplayDevice.cs
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DisplayDevice.cs
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#region License
//
// The Open Toolkit Library License
//
// Copyright (c) 2006 - 2010 the Open Toolkit library.
//
// 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.
//
#endregion
using System;
using System.Collections.Generic;
using System.Diagnostics;
#if !MINIMAL
using System.Drawing;
#endif
namespace OpenTK
{
/// <summary>
/// Defines a display device on the underlying system, and provides
/// methods to query and change its display parameters.
/// </summary>
public class DisplayDevice
{
// TODO: Add properties that describe the 'usable' size of the Display, i.e. the maximized size without the taskbar etc.
// TODO: Does not detect changes to primary device.
#region Fields
bool primary;
Rectangle bounds;
DisplayResolution current_resolution = new DisplayResolution();
internal DisplayResolution original_resolution;
List<DisplayResolution> available_resolutions = new List<DisplayResolution>();
IList<DisplayResolution> available_resolutions_readonly;
internal object Id; // A platform-specific id for this monitor
static readonly object display_lock = new object();
static DisplayDevice primary_display;
static Platform.IDisplayDeviceDriver implementation;
#endregion
#region Constructors
static DisplayDevice()
{
implementation = Platform.Factory.Default.CreateDisplayDeviceDriver();
}
internal DisplayDevice()
{
available_resolutions_readonly = available_resolutions.AsReadOnly();
}
internal DisplayDevice(DisplayResolution currentResolution, bool primary,
IEnumerable<DisplayResolution> availableResolutions, Rectangle bounds,
object id)
: this()
{
#warning "Consolidate current resolution with bounds? Can they fall out of sync right now?"
this.current_resolution = currentResolution;
IsPrimary = primary;
this.available_resolutions.AddRange(availableResolutions);
this.bounds = bounds == Rectangle.Empty ? currentResolution.Bounds : bounds;
this.Id = id;
}
#endregion
#region --- Public Methods ---
#region public Rectangle Bounds
/// <summary>
/// Gets the bounds of this instance in pixel coordinates..
/// </summary>
public Rectangle Bounds
{
get { return bounds; }
internal set
{
bounds = value;
current_resolution.Height = bounds.Height;
current_resolution.Width = bounds.Width;
}
}
#endregion
#region public int Width
/// <summary>Gets a System.Int32 that contains the width of this display in pixels.</summary>
public int Width { get { return current_resolution.Width; } }
#endregion
#region public int Height
/// <summary>Gets a System.Int32 that contains the height of this display in pixels.</summary>
public int Height { get { return current_resolution.Height; } }
#endregion
#region public int BitsPerPixel
/// <summary>Gets a System.Int32 that contains number of bits per pixel of this display. Typical values include 8, 16, 24 and 32.</summary>
public int BitsPerPixel
{
get { return current_resolution.BitsPerPixel; }
internal set { current_resolution.BitsPerPixel = value; }
}
#endregion
#region public float RefreshRate
/// <summary>
/// Gets a System.Single representing the vertical refresh rate of this display.
/// </summary>
public float RefreshRate
{
get { return current_resolution.RefreshRate; }
internal set { current_resolution.RefreshRate = value; }
}
#endregion
#region public bool IsPrimary
/// <summary>Gets a System.Boolean that indicates whether this Display is the primary Display in systems with multiple Displays.</summary>
public bool IsPrimary
{
get { return primary; }
internal set
{
if (value && primary_display != null && primary_display != this)
primary_display.IsPrimary = false;
lock (display_lock)
{
primary = value;
if (value)
primary_display = this;
}
}
}
#endregion
#region public DisplayResolution SelectResolution(int width, int height, int bitsPerPixel, float refreshRate)
/// <summary>
/// Selects an available resolution that matches the specified parameters.
/// </summary>
/// <param name="width">The width of the requested resolution in pixels.</param>
/// <param name="height">The height of the requested resolution in pixels.</param>
/// <param name="bitsPerPixel">The bits per pixel of the requested resolution.</param>
/// <param name="refreshRate">The refresh rate of the requested resolution in hertz.</param>
/// <returns>The requested DisplayResolution or null if the parameters cannot be met.</returns>
/// <remarks>
/// <para>If a matching resolution is not found, this function will retry ignoring the specified refresh rate,
/// bits per pixel and resolution, in this order. If a matching resolution still doesn't exist, this function will
/// return the current resolution.</para>
/// <para>A parameter set to 0 or negative numbers will not be used in the search (e.g. if refreshRate is 0,
/// any refresh rate will be considered valid).</para>
/// <para>This function allocates memory.</para>
/// </remarks>
public DisplayResolution SelectResolution(int width, int height, int bitsPerPixel, float refreshRate)
{
DisplayResolution resolution = FindResolution(width, height, bitsPerPixel, refreshRate);
if (resolution == null)
resolution = FindResolution(width, height, bitsPerPixel, 0);
if (resolution == null)
resolution = FindResolution(width, height, 0, 0);
if (resolution == null)
return current_resolution;
return resolution;
}
#endregion
#region public IList<DisplayResolution> AvailableResolutions
/// <summary>
/// Gets the list of <see cref="DisplayResolution"/> objects available on this device.
/// </summary>
public IList<DisplayResolution> AvailableResolutions
{
get { return available_resolutions_readonly; }
internal set
{
available_resolutions = (List<DisplayResolution>)value;
available_resolutions_readonly = available_resolutions.AsReadOnly();
}
}
#endregion
#region public void ChangeResolution(DisplayResolution resolution)
/// <summary>Changes the resolution of the DisplayDevice.</summary>
/// <param name="resolution">The resolution to set. <see cref="DisplayDevice.SelectResolution"/></param>
/// <exception cref="Graphics.GraphicsModeException">Thrown if the requested resolution could not be set.</exception>
/// <remarks>If the specified resolution is null, this function will restore the original DisplayResolution.</remarks>
public void ChangeResolution(DisplayResolution resolution)
{
if (resolution == null)
this.RestoreResolution();
if (resolution == current_resolution)
return;
//effect.FadeOut();
if (implementation.TryChangeResolution(this, resolution))
{
if (original_resolution == null)
original_resolution = current_resolution;
current_resolution = resolution;
}
else throw new Graphics.GraphicsModeException(String.Format("Device {0}: Failed to change resolution to {1}.",
this, resolution));
//effect.FadeIn();
}
#endregion
#region public void ChangeResolution(int width, int height, int bitsPerPixel, float refreshRate)
/// <summary>Changes the resolution of the DisplayDevice.</summary>
/// <param name="width">The new width of the DisplayDevice.</param>
/// <param name="height">The new height of the DisplayDevice.</param>
/// <param name="bitsPerPixel">The new bits per pixel of the DisplayDevice.</param>
/// <param name="refreshRate">The new refresh rate of the DisplayDevice.</param>
/// <exception cref="Graphics.GraphicsModeException">Thrown if the requested resolution could not be set.</exception>
public void ChangeResolution(int width, int height, int bitsPerPixel, float refreshRate)
{
this.ChangeResolution(this.SelectResolution(width, height, bitsPerPixel, refreshRate));
}
#endregion
#region public void RestoreResolution()
/// <summary>Restores the original resolution of the DisplayDevice.</summary>
/// <exception cref="Graphics.GraphicsModeException">Thrown if the original resolution could not be restored.</exception>
public void RestoreResolution()
{
if (original_resolution != null)
{
//effect.FadeOut();
if (implementation.TryRestoreResolution(this))
{
current_resolution = original_resolution;
original_resolution = null;
}
else throw new Graphics.GraphicsModeException(String.Format("Device {0}: Failed to restore resolution.", this));
//effect.FadeIn();
}
}
#endregion
#region public static IList<DisplayDevice> AvailableDisplays
/// <summary>
/// Gets the list of available <see cref="DisplayDevice"/> objects.
/// This function allocates memory.
/// </summary>
[Obsolete("Use GetDisplay(DisplayIndex) instead.")]
public static IList<DisplayDevice> AvailableDisplays
{
get
{
List<DisplayDevice> displays = new List<DisplayDevice>();
for (int i = 0; i < 6; i++)
{
DisplayDevice dev = GetDisplay(DisplayIndex.First + i);
if (dev != null)
displays.Add(dev);
}
return displays.AsReadOnly();
}
}
#endregion
#region public static DisplayDevice Default
/// <summary>Gets the default (primary) display of this system.</summary>
public static DisplayDevice Default
{
get { return implementation.GetDisplay(DisplayIndex.Primary); }
}
#endregion
#region GetDisplay
/// <summary>
/// Gets the <see cref="DisplayDevice"/> for the specified <see cref="DisplayIndex"/>.
/// </summary>
/// <param name="index">The <see cref="DisplayIndex"/> that defines the desired display.</param>
/// <returns>A <see cref="DisplayDevice"/> or null, if no device corresponds to the specified index.</returns>
public static DisplayDevice GetDisplay(DisplayIndex index)
{
return implementation.GetDisplay(index);
}
#endregion
#endregion
#region --- Private Methods ---
#region DisplayResolution FindResolution(int width, int height, int bitsPerPixel, float refreshRate)
DisplayResolution FindResolution(int width, int height, int bitsPerPixel, float refreshRate)
{
return available_resolutions.Find(delegate(DisplayResolution test)
{
return
((width > 0 && width == test.Width) || width == 0) &&
((height > 0 && height == test.Height) || height == 0) &&
((bitsPerPixel > 0 && bitsPerPixel == test.BitsPerPixel) || bitsPerPixel == 0) &&
((refreshRate > 0 && System.Math.Abs(refreshRate - test.RefreshRate) < 1.0) || refreshRate == 0);
});
}
#endregion
#endregion
#region --- Overrides ---
#region public override string ToString()
/// <summary>
/// Returns a System.String representing this DisplayDevice.
/// </summary>
/// <returns>A System.String representing this DisplayDevice.</returns>
public override string ToString()
{
return String.Format("{0}: {1} ({2} modes available)", IsPrimary ? "Primary" : "Secondary",
Bounds.ToString(), available_resolutions.Count);
}
#endregion
#region public override bool Equals(object obj)
///// <summary>Determines whether the specified DisplayDevices are equal.</summary>
///// <param name="obj">The System.Object to check against.</param>
///// <returns>True if the System.Object is an equal DisplayDevice; false otherwise.</returns>
//public override bool Equals(object obj)
//{
// if (obj is DisplayDevice)
// {
// DisplayDevice dev = (DisplayDevice)obj;
// return
// IsPrimary == dev.IsPrimary &&
// current_resolution == dev.current_resolution &&
// available_resolutions.Count == dev.available_resolutions.Count;
// }
// return false;
//}
#endregion
#region public override int GetHashCode()
///// <summary>Returns a unique hash representing this DisplayDevice.</summary>
///// <returns>A System.Int32 that may serve as a hash code for this DisplayDevice.</returns>
////public override int GetHashCode()
//{
// return current_resolution.GetHashCode() ^ IsPrimary.GetHashCode() ^ available_resolutions.Count;
//}
#endregion
#endregion
}
#region --- FadeEffect ---
#if false
class FadeEffect : IDisposable
{
List<Form> forms = new List<Form>();
double opacity_step = 0.04;
int sleep_step;
internal FadeEffect()
{
foreach (Screen s in Screen.AllScreens)
{
Form form = new Form();
form.ShowInTaskbar = false;
form.StartPosition = FormStartPosition.Manual;
form.WindowState = FormWindowState.Maximized;
form.FormBorderStyle = FormBorderStyle.None;
form.TopMost = true;
form.BackColor = System.Drawing.Color.Black;
forms.Add(form);
}
sleep_step = 10 / forms.Count;
MoveToStartPositions();
}
void MoveToStartPositions()
{
int count = 0;
foreach (Screen s in Screen.AllScreens)
{
// forms[count++].Location = new System.Drawing.Point(s.Bounds.X, s.Bounds.Y);
//forms[count].Size = new System.Drawing.Size(4096, 4096);
count++;
}
}
bool FadedOut
{
get
{
bool ready = true;
foreach (Form form in forms)
ready = ready && form.Opacity >= 1.0;
return ready;
}
}
bool FadedIn
{
get
{
bool ready = true;
foreach (Form form in forms)
ready = ready && form.Opacity <= 0.0;
return ready;
}
}
internal void FadeOut()
{
MoveToStartPositions();
foreach (Form form in forms)
{
form.Opacity = 0.0;
form.Visible = true;
}
while (!FadedOut)
{
foreach (Form form in forms)
{
form.Opacity += opacity_step;
form.Refresh();
}
Thread.Sleep(sleep_step);
}
}
internal void FadeIn()
{
MoveToStartPositions();
foreach (Form form in forms)
form.Opacity = 1.0;
while (!FadedIn)
{
foreach (Form form in forms)
{
form.Opacity -= opacity_step;
form.Refresh();
}
Thread.Sleep(sleep_step);
}
foreach (Form form in forms)
form.Visible = false;
}
#region IDisposable Members
public void Dispose()
{
foreach (Form form in forms)
form.Dispose();
}
#endregion
}
#endif
#endregion
}