114 lines
2.8 KiB
C#
114 lines
2.8 KiB
C#
using System;
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using BizHawk.Bizware.BizwareGL;
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namespace BizHawk.Client.EmuHawk
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{
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/// <summary>
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/// This singleton class manages OpenGL contexts, in an effort to minimize context changes.
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/// </summary>
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public class GLManager : IDisposable
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{
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private GLManager()
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{
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}
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public void Dispose()
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{
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}
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public static GLManager Instance { get; private set; }
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Bizware.BizwareGL.Drivers.OpenTK.IGL_TK MainContext;
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public static void CreateInstance(Bizware.BizwareGL.Drivers.OpenTK.IGL_TK mainContext)
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{
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if (Instance != null) throw new InvalidOperationException($"Attempted to create more than one {nameof(GLManager)}");
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Instance = new GLManager();
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Instance.MainContext = mainContext;
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}
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public void ReleaseGLContext(object o)
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{
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ContextRef cr = (ContextRef)o;
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cr.gl.Dispose();
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}
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//[System.Runtime.InteropServices.DllImport("opengl32.dll")]
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//bool wglShareLists(IntPtr hglrc1, IntPtr hglrc2);
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public ContextRef CreateGLContext(int major_version, int minor_version, bool forward_compatible)
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{
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var gl = new Bizware.BizwareGL.Drivers.OpenTK.IGL_TK(major_version, minor_version, forward_compatible);
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var ret = new ContextRef { gl = gl };
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return ret;
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}
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public ContextRef GetContextForGraphicsControl(GraphicsControl gc)
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{
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return new ContextRef
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{
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gc = gc,
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gl = gc.IGL
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};
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}
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/// <summary>
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/// This might not be a GL implementation. If it isnt GL, then setting it as active context is just NOP
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/// </summary>
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public ContextRef GetContextForIGL(IGL gl)
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{
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return new ContextRef
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{
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gl = gl
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};
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}
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ContextRef ActiveContext;
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public void Invalidate()
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{
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ActiveContext = null;
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}
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public void Activate(ContextRef cr)
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{
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bool begun = false;
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//this needs a begin signal to set the swap chain to the next backbuffer
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if (cr.gl is BizHawk.Bizware.BizwareGL.Drivers.SlimDX.IGL_SlimDX9)
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{
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cr.gc.Begin();
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begun = true;
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}
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if (cr == ActiveContext)
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return;
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ActiveContext = cr;
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if (cr.gc != null)
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{
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//TODO - this is checking the current context inside to avoid an extra NOP context change. make this optional or remove it, since we're tracking it here
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if(!begun)
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cr.gc.Begin();
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}
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else if (cr.gl != null)
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{
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if(cr.gl is BizHawk.Bizware.BizwareGL.Drivers.OpenTK.IGL_TK)
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((BizHawk.Bizware.BizwareGL.Drivers.OpenTK.IGL_TK)cr.gl).MakeDefaultCurrent();
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}
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}
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public void Deactivate()
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{
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//this is here for future use and tracking purposes.. however.. instead of relying on this, we should just make sure we always activate what we need before we use it
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}
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public class ContextRef
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{
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public IGL gl;
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public GraphicsControl gc;
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}
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}
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} |