135 lines
4.4 KiB
C#
135 lines
4.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using SharpGL.Version;
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namespace SharpGL.RenderContextProviders
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{
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public class NativeWindowRenderContextProvider : RenderContextProvider
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="NativeWindowRenderContextProvider"/> class.
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/// </summary>
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public NativeWindowRenderContextProvider()
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{
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// We cannot layer GDI drawing on top of open gl drawing.
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GDIDrawingEnabled = false;
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}
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/// <summary>
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/// Creates the render context provider. Must also create the OpenGL extensions.
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/// </summary>
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/// <param name="openGLVersion">The desired OpenGL version.</param>
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/// <param name="gl">The OpenGL context.</param>
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/// <param name="width">The width.</param>
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/// <param name="height">The height.</param>
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/// <param name="bitDepth">The bit depth.</param>
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/// <param name="parameter">The parameter.</param>
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/// <returns></returns>
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/// <exception cref="System.Exception">A valid Window Handle must be provided for the NativeWindowRenderContextProvider</exception>
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public override bool Create(OpenGLVersion openGLVersion, OpenGL gl, int width, int height, int bitDepth, object parameter)
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{
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// Call the base.
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base.Create(openGLVersion, gl, width, height, bitDepth, parameter);
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// Cast the parameter to the device context.
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try
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{
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windowHandle = (IntPtr)parameter;
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}
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catch
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{
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throw new Exception("A valid Window Handle must be provided for the NativeWindowRenderContextProvider");
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}
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// Get the window device context.
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deviceContextHandle = Win32.GetDC(windowHandle);
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// Setup a pixel format.
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Win32.PIXELFORMATDESCRIPTOR pfd = new Win32.PIXELFORMATDESCRIPTOR();
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pfd.Init();
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pfd.nVersion = 1;
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pfd.dwFlags = Win32.PFD_DRAW_TO_WINDOW | Win32.PFD_SUPPORT_OPENGL | Win32.PFD_DOUBLEBUFFER;
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pfd.iPixelType = Win32.PFD_TYPE_RGBA;
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pfd.cColorBits = (byte)bitDepth;
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pfd.cDepthBits = 16;
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pfd.cStencilBits = 8;
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pfd.iLayerType = Win32.PFD_MAIN_PLANE;
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// Match an appropriate pixel format
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int iPixelformat;
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if((iPixelformat = Win32.ChoosePixelFormat(deviceContextHandle, pfd)) == 0 )
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return false;
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// Sets the pixel format
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if (Win32.SetPixelFormat(deviceContextHandle, iPixelformat, pfd) == 0)
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{
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return false;
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}
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// Create the render context.
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renderContextHandle = Win32.wglCreateContext(deviceContextHandle);
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// Make the context current.
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MakeCurrent();
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// Update the render context if required.
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UpdateContextVersion(gl);
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// Return success.
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return true;
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}
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/// <summary>
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/// Destroys the render context provider instance.
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/// </summary>
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public override void Destroy()
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{
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// Release the device context.
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Win32.ReleaseDC(windowHandle, deviceContextHandle);
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// Call the base, which will delete the render context handle.
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base.Destroy();
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}
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/// <summary>
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/// Sets the dimensions of the render context provider.
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/// </summary>
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/// <param name="width">Width.</param>
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/// <param name="height">Height.</param>
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public override void SetDimensions(int width, int height)
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{
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// Call the base.
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base.SetDimensions(width, height);
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}
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/// <summary>
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/// Blit the rendered data to the supplied device context.
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/// </summary>
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/// <param name="hdc">The HDC.</param>
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public override void Blit(IntPtr hdc)
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{
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if(deviceContextHandle != IntPtr.Zero || windowHandle != IntPtr.Zero)
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{
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// Swap the buffers.
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Win32.SwapBuffers(deviceContextHandle);
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}
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}
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/// <summary>
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/// Makes the render context current.
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/// </summary>
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public override void MakeCurrent()
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{
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if(renderContextHandle != IntPtr.Zero)
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Win32.wglMakeCurrent(deviceContextHandle, renderContextHandle);
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}
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/// <summary>
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/// The window handle.
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/// </summary>
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protected IntPtr windowHandle = IntPtr.Zero;
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}
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}
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