mirror of
https://github.com/Ryujinx/Opentk.git
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397 lines
13 KiB
C#
397 lines
13 KiB
C#
#region --- License ---
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/* Copyright (c) 2006, 2007 Stefanos Apostolopoulos
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* Contributions from Erik Ylvisaker
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* See license.txt for license info
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*/
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#endregion
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#region --- Using Directives ---
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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.Runtime.InteropServices;
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using System.Diagnostics;
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using OpenTK.OpenGL;
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#endregion
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namespace OpenTK.Platform.Windows
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{
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/// <summary>
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/// Provides methods to create and control an opengl context on the Windows platform.
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/// This class supports OpenTK, and is not intended for use by OpenTK programs.
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/// </summary>
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internal sealed class WinGLContext : OpenTK.Platform.IGLContext, IDisposable
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{
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private IntPtr deviceContext;
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private IntPtr renderContext;
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static private IntPtr opengl32Handle;
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private const string opengl32Name = "OPENGL32.DLL";
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private WindowInfo windowInfo = new WindowInfo();
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private DisplayMode mode;
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private bool disposed;
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#region --- Contructors ---
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internal WinGLContext()
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: this(new DisplayMode(640, 480))
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{
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}
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internal WinGLContext(DisplayMode mode)
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{
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//Trace.WriteLine(String.Format("Creating opengl context (driver: {0})", this.ToString()));
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this.mode = mode;
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}
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public WinGLContext(DisplayMode mode, IWindowInfo info)
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{
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this.windowInfo = info as WindowInfo;
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this.mode = mode;
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}
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#endregion
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#region private void PrepareContext()
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private void PrepareContext()
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{
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if (this.windowInfo.Handle == IntPtr.Zero)
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throw new ApplicationException("No Window Handle specified for opengl context.");
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Debug.WriteLine(String.Format("OpenGL context is bound to handle: {0}", this.windowInfo.Handle));
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// Dynamically load the OpenGL32.dll in order to use the extension loading capabilities of Wgl.
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if (opengl32Handle == IntPtr.Zero)
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{
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opengl32Handle = Functions.LoadLibrary(opengl32Name);
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if (opengl32Handle == IntPtr.Zero)
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{
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//System.Diagnostics.Debug.WriteLine("LoadLibrary({0}) set error code: {1}. Will not load extensions.", _dll_name, error_code);
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throw new ApplicationException(
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String.Format(
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"LoadLibrary(\"{0}\") call failed with code {1}",
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opengl32Name,
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Marshal.GetLastWin32Error()
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)
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);
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}
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Debug.WriteLine(String.Format("Loaded opengl32.dll: {0}", opengl32Handle));
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}
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deviceContext = Functions.GetDC(this.windowInfo.Handle);
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Debug.WriteLine(String.Format("Device context: {0}", deviceContext));
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Debug.Write("Setting pixel format... ");
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PixelFormatDescriptor pixelFormat = new PixelFormatDescriptor();
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pixelFormat.Size = API.PixelFormatDescriptorSize;
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pixelFormat.Version = API.PixelFormatDescriptorVersion;
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pixelFormat.Flags =
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PixelFormatDescriptorFlags.SUPPORT_OPENGL |
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PixelFormatDescriptorFlags.DRAW_TO_WINDOW;
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pixelFormat.ColorBits = (byte)(mode.Color.Red + mode.Color.Green + mode.Color.Blue);
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if (mode.Color.IsIndexed)
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{
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pixelFormat.PixelType = PixelType.INDEXED;
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}
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else
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{
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pixelFormat.PixelType = PixelType.RGBA;
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pixelFormat.RedBits = (byte)mode.Color.Red;
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pixelFormat.GreenBits = (byte)mode.Color.Green;
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pixelFormat.BlueBits = (byte)mode.Color.Blue;
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pixelFormat.AlphaBits = (byte)mode.Color.Alpha;
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}
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/*
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if (accum != null)
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{
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pixelFormat.AccumBits = (byte)(accum.Red + accum.Green + accum.Blue);
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pixelFormat.AccumRedBits = (byte)accum.Red;
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pixelFormat.AccumGreenBits = (byte)accum.Green;
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pixelFormat.AccumBlueBits = (byte)accum.Blue;
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pixelFormat.AccumAlphaBits = (byte)accum.Alpha;
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}
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*/
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pixelFormat.DepthBits = (byte)mode.DepthBits;
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pixelFormat.StencilBits = (byte)mode.StencilBits;
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if (mode.DepthBits <= 0)
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{
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pixelFormat.Flags |= PixelFormatDescriptorFlags.DEPTH_DONTCARE;
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}
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if (mode.Stereo)
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{
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pixelFormat.Flags |= PixelFormatDescriptorFlags.STEREO;
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}
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if (mode.Buffers > 1)
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{
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pixelFormat.Flags |= PixelFormatDescriptorFlags.DOUBLEBUFFER;
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}
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// TODO: More elaborate mode setting, using DescribePixelFormat.
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/*
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unsafe
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{
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int pixel = Wgl.Imports.ChoosePixelFormat(deviceContext, &pixelFormat);
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if (pixel == 0)
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{
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throw new ApplicationException("The requested pixel format is not supported by the hardware configuration.");
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}
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Wgl.Imports.SetPixelFormat(deviceContext, pixel, &pixelFormat);
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Debug.WriteLine(String.Format("done! (format: {0})", pixel));
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}
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*/
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int pixel = Functions.ChoosePixelFormat(deviceContext, ref pixelFormat);
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if (pixel == 0)
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{
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throw new ApplicationException("The requested pixel format is not supported by the hardware configuration.");
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}
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Functions.SetPixelFormat(deviceContext, pixel, ref pixelFormat);
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Debug.Print("done! (format: {0})", pixel);
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}
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#endregion
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#region --- IGLContext Members ---
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#region public IntPtr Context
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public IntPtr Context
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{
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get { return renderContext; }
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private set { renderContext = value; }
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}
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#endregion
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#region public IWindowInfo Info
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public IWindowInfo Info
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{
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get { return windowInfo; }
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}
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#endregion
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#region public DisplayMode Mode
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public DisplayMode Mode
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{
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get { return new DisplayMode(mode); }
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}
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#endregion
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#region public void CreateContext()
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public void CreateContext()
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{
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this.CreateContext(true, null);
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}
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#endregion
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#region public void CreateContext(bool direct)
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public void CreateContext(bool direct)
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{
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this.CreateContext(direct, null);
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}
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#endregion
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#region public void CreateContext(bool direct, IGLContext source)
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public void CreateContext(bool direct, IGLContext source)
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{
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this.PrepareContext();
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Debug.Write("Creating render context... ");
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// Do not rely on OpenTK.Platform.Windows.Wgl - the context is not ready yet,
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// and Wgl extensions will fail to load.
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renderContext = Wgl.Imports.CreateContext(deviceContext);
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if (renderContext != IntPtr.Zero)
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{
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Debug.WriteLine(String.Format("done! (id: {0})", renderContext));
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}
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else
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{
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throw new ApplicationException("Could not create OpenGL render context (Wgl.CreateContext() return 0).");
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}
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Wgl.Imports.MakeCurrent(deviceContext, renderContext);
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Wgl.LoadAll();
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if (source != null)
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{
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Debug.Print("Sharing state with context {0}", (source as WinGLContext).Context);
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Wgl.Imports.ShareLists(renderContext, (source as WinGLContext).Context);
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}
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}
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#endregion
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#region public void SwapBuffers()
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public void SwapBuffers()
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{
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Functions.SwapBuffers(deviceContext);
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}
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#endregion
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#region public IntPtr GetAddress(string function_string)
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public IntPtr GetAddress(string function_string)
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{
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return Wgl.Imports.GetProcAddress(function_string);
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}
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#endregion
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#region public void MakeCurrent()
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public void MakeCurrent()
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{
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if (!Wgl.Imports.MakeCurrent(deviceContext, renderContext))
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{
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Debug.Print("WinGLContext.MakeCurrent() call failed. Error: {0}", Marshal.GetLastWin32Error());
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}
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}
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#endregion
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#region public DisplayMode[] GetDisplayModes()
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public IEnumerable<DisplayMode> GetDisplayModes()
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{
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List<DisplayMode> modes = new List<DisplayMode>();
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bool done = false;
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int index = 0;
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while (!done)
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{
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DeviceMode currentMode = new DeviceMode();
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IntPtr handle = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(DeviceMode)));
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Marshal.StructureToPtr(currentMode, handle, true);
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done = (Functions.EnumDisplaySettings(null, index++, handle) != 0) ? false : true;
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int error = Marshal.GetLastWin32Error();
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Marshal.PtrToStructure(handle, currentMode);
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Marshal.FreeHGlobal(handle);
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if (error != 0)
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{
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Console.WriteLine("Error: {0}", error);
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continue;
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}
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if (done)
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break;
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//DisplayMode mode = new DisplayMode(currentMode.PelsWidth, currentMode.PelsHeight);
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DisplayMode mode = new DisplayMode(
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currentMode.PelsWidth,
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currentMode.PelsHeight,
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new ColorMode(currentMode.BitsPerPel),
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0,
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0,
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0,
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0,
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false,
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false,
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false,
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currentMode.DisplayFrequency
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);
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modes.Add(mode);
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}
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return modes.ToArray();
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}
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#endregion
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#endregion
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#region --- IDisposable Members ---
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public void Dispose()
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{
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//Debug.Print("Manually disposing WinGLContext {0}.", this.renderContext);
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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private void Dispose(bool calledManually)
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{
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if (!disposed)
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{
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// Clean unmanaged resources here
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// The following call uses the Debug and Wgl classes, making it unsafe?
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ReleaseResources();
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if (calledManually)
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{
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// Safe to clean managed resources
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}
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disposed = true;
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}
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}
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~WinGLContext()
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{
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Dispose(false);
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}
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#region private void ReleaseResources()
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private void ReleaseResources()
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{
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if (renderContext != IntPtr.Zero)
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{
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Wgl.Imports.MakeCurrent(IntPtr.Zero, IntPtr.Zero);
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if (!Wgl.Imports.DeleteContext(renderContext))
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{
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//throw new ApplicationException("Could not destroy the OpenGL render context. Error: " + Marshal.GetLastWin32Error());
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//Debug.Print("Could not destroy the OpenGL render context. Error: {0}", Marshal.GetLastWin32Error());
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}
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renderContext = IntPtr.Zero;
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}
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if (deviceContext != IntPtr.Zero)
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{
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if (!Functions.ReleaseDC(this.windowInfo.Handle, deviceContext))
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{
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//throw new ApplicationException("Could not release device context. Error: " + Marshal.GetLastWin32Error());
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//Debug.Print("Could not destroy the device context. Error: {0}", Marshal.GetLastWin32Error());
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}
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}
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if (opengl32Handle != IntPtr.Zero)
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{
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if (!Functions.FreeLibrary(opengl32Handle))
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{
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//throw new ApplicationException("FreeLibray call failed ('opengl32.dll'), Error: " + Marshal.GetLastWin32Error());
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//Debug.Print("Could not release {0}. Error: {1}", opengl32Name, Marshal.GetLastWin32Error());
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}
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opengl32Handle = IntPtr.Zero;
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}
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}
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#endregion
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#endregion
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}
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}
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