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409 lines
14 KiB
C#
409 lines
14 KiB
C#
//
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//
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// AglContext.cs
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//
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// Created by Erik Ylvisaker on 3/17/08.
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// Copyright 2008. All rights reserved.
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//
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//
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using Control = System.Windows.Forms.Control;
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namespace OpenTK.Platform.MacOS
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{
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using Carbon;
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using Graphics;
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using AGLRendererInfo = IntPtr;
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using AGLPixelFormat = IntPtr;
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using AGLContext = IntPtr;
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using AGLPbuffer = IntPtr;
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class AglContext : DesktopGraphicsContext
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{
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bool mVSync = false;
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// Todo: keep track of which display adapter was specified when the context was created.
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// IntPtr displayID;
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GraphicsMode graphics_mode;
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CarbonWindowInfo carbonWindow;
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IntPtr shareContextRef;
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public AglContext(GraphicsMode mode, IWindowInfo window, IGraphicsContext shareContext)
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{
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Debug.Print("Context Type: {0}", shareContext);
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Debug.Print("Window info: {0}", window);
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this.graphics_mode = mode;
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this.carbonWindow = (CarbonWindowInfo)window;
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if (shareContext is AglContext)
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shareContextRef = ((AglContext)shareContext).Handle.Handle;
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CreateContext(mode, carbonWindow, shareContextRef, true);
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}
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private void AddPixelAttrib(List<int> aglAttributes, Agl.PixelFormatAttribute pixelFormatAttribute)
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{
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Debug.Print(pixelFormatAttribute.ToString());
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aglAttributes.Add((int)pixelFormatAttribute);
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}
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private void AddPixelAttrib(List<int> aglAttributes, Agl.PixelFormatAttribute pixelFormatAttribute, int value)
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{
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Debug.Print("{0} : {1}", pixelFormatAttribute, value);
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aglAttributes.Add((int)pixelFormatAttribute);
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aglAttributes.Add(value);
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}
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void CreateContext(GraphicsMode mode, CarbonWindowInfo carbonWindow,
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IntPtr shareContextRef, bool fullscreen)
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{
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List<int> aglAttributes = new List<int>();
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Debug.Print("AGL pixel format attributes:");
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Debug.Indent();
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_RGBA);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_DOUBLEBUFFER);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_RED_SIZE, mode.ColorFormat.Red);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_GREEN_SIZE, mode.ColorFormat.Green);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_BLUE_SIZE, mode.ColorFormat.Blue);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ALPHA_SIZE, mode.ColorFormat.Alpha);
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if (mode.Depth > 0)
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_DEPTH_SIZE, mode.Depth);
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if (mode.Stencil > 0)
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_STENCIL_SIZE, mode.Stencil);
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if (mode.AccumulatorFormat.BitsPerPixel > 0)
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{
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ACCUM_RED_SIZE, mode.AccumulatorFormat.Red);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ACCUM_GREEN_SIZE, mode.AccumulatorFormat.Green);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ACCUM_BLUE_SIZE, mode.AccumulatorFormat.Blue);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ACCUM_ALPHA_SIZE, mode.AccumulatorFormat.Alpha);
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}
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if (mode.Samples > 0)
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{
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_SAMPLE_BUFFERS_ARB, 1);
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_SAMPLES_ARB, mode.Samples);
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}
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if (fullscreen)
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{
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_FULLSCREEN);
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}
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AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_NONE);
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Debug.Unindent();
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Debug.Write("Attribute array: ");
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for (int i = 0; i < aglAttributes.Count; i++)
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Debug.Write(aglAttributes[i].ToString() + " ");
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Debug.WriteLine("");
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AGLPixelFormat myAGLPixelFormat;
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// Choose a pixel format with the attributes we specified.
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if (fullscreen)
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{
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IntPtr gdevice;
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OSStatus status = Carbon.API.DMGetGDeviceByDisplayID(
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QuartzDisplayDeviceDriver.MainDisplay, out gdevice, false);
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if (status != OSStatus.NoError)
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throw new MacOSException(status, "DMGetGDeviceByDisplayID failed.");
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myAGLPixelFormat = Agl.aglChoosePixelFormat(
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ref gdevice, 1,
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aglAttributes.ToArray());
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Agl.AglError err = Agl.GetError();
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if (err == Agl.AglError.BadPixelFormat)
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{
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Debug.Print("Failed to create full screen pixel format.");
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Debug.Print("Trying again to create a non-fullscreen pixel format.");
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CreateContext(mode, carbonWindow, shareContextRef, false);
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return;
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}
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}
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else
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{
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myAGLPixelFormat = Agl.aglChoosePixelFormat(
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IntPtr.Zero, 0,
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aglAttributes.ToArray());
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MyAGLReportError("aglChoosePixelFormat");
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}
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// create the context and share it with the share reference.
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Handle = new ContextHandle( Agl.aglCreateContext(myAGLPixelFormat, shareContextRef));
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MyAGLReportError("aglCreateContext");
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// Free the pixel format from memory.
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Agl.aglDestroyPixelFormat(myAGLPixelFormat);
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MyAGLReportError("aglDestroyPixelFormat");
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Debug.Print("IsControl: {0}", carbonWindow.IsControl);
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SetDrawable(carbonWindow);
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SetBufferRect(carbonWindow);
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Update(carbonWindow);
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MakeCurrent(carbonWindow);
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Debug.Print("context: {0}", Handle.Handle);
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}
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void SetBufferRect(CarbonWindowInfo carbonWindow)
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{
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if (carbonWindow.IsControl == false)
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return;
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System.Windows.Forms.Control ctrl = Control.FromHandle(carbonWindow.WindowRef);
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if (ctrl.TopLevelControl == null)
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return;
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Rect rect = API.GetControlBounds(carbonWindow.WindowRef);
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System.Windows.Forms.Form frm = (System.Windows.Forms.Form) ctrl.TopLevelControl;
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System.Drawing.Point loc =
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frm.PointToClient(ctrl.PointToScreen(System.Drawing.Point.Empty));
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rect.X = (short)loc.X;
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rect.Y = (short)loc.Y;
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Debug.Print("Setting buffer_rect for control.");
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Debug.Print("MacOS Coordinate Rect: {0}", rect);
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rect.Y = (short)(ctrl.TopLevelControl.ClientSize.Height - rect.Y - rect.Height);
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Debug.Print(" AGL Coordinate Rect: {0}", rect);
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int[] glrect = new int[4];
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glrect[0] = rect.X;
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glrect[1] = rect.Y;
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glrect[2] = rect.Width;
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glrect[3] = rect.Height;
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Agl.aglSetInteger(Handle.Handle, Agl.ParameterNames.AGL_BUFFER_RECT, glrect);
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MyAGLReportError("aglSetInteger");
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Agl.aglEnable(Handle.Handle, Agl.ParameterNames.AGL_BUFFER_RECT);
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MyAGLReportError("aglEnable");
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}
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void SetDrawable(CarbonWindowInfo carbonWindow)
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{
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IntPtr windowPort = GetWindowPortForWindowInfo(carbonWindow);
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Agl.aglSetDrawable(Handle.Handle, windowPort);
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MyAGLReportError("aglSetDrawable");
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}
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private static IntPtr GetWindowPortForWindowInfo(CarbonWindowInfo carbonWindow)
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{
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IntPtr windowPort;
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if (carbonWindow.IsControl)
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{
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IntPtr controlOwner = API.GetControlOwner(carbonWindow.WindowRef);
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windowPort = API.GetWindowPort(controlOwner);
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}
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else
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windowPort = API.GetWindowPort(carbonWindow.WindowRef);
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return windowPort;
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}
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public override void Update(IWindowInfo window)
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{
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CarbonWindowInfo carbonWindow = (CarbonWindowInfo)window;
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SetDrawable(carbonWindow);
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SetBufferRect(carbonWindow);
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Agl.aglUpdateContext(Handle.Handle);
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}
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void MyAGLReportError(string function)
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{
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Agl.AglError err = Agl.GetError();
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if (err != Agl.AglError.NoError)
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throw new MacOSException((OSStatus)err, string.Format(
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"AGL Error from function {0}: {1} {2}",
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function, err, Agl.ErrorString(err)));
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}
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bool firstFullScreen = false;
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internal void SetFullScreen(CarbonWindowInfo info)
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{
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Agl.aglSetFullScreen(Handle.Handle, 0, 0, 0, 0);
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// This is a weird hack to workaround a bug where the first time a context
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// is made fullscreen, we just end up with a blank screen. So we undo it as fullscreen
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// and redo it as fullscreen.
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if (firstFullScreen == false)
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{
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firstFullScreen = true;
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UnsetFullScreen(info);
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SetFullScreen(info);
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}
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}
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internal void UnsetFullScreen(CarbonWindowInfo windowInfo)
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{
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Agl.aglSetDrawable(Handle.Handle, IntPtr.Zero);
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SetDrawable(windowInfo);
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}
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#region IGraphicsContext Members
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bool firstSwap = false;
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public override void SwapBuffers()
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{
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// this is part of the hack to avoid dropping the first frame when
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// using multiple GLControls.
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if (firstSwap == false && carbonWindow.IsControl)
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{
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Debug.WriteLine("--> Resetting drawable. <--");
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firstSwap = true;
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SetDrawable(carbonWindow);
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Update(carbonWindow);
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}
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Agl.aglSwapBuffers(Handle.Handle);
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MyAGLReportError("aglSwapBuffers");
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}
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public override void MakeCurrent(IWindowInfo window)
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{
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if (Agl.aglSetCurrentContext(Handle.Handle) == false)
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MyAGLReportError("aglSetCurrentContext");
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}
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public override bool IsCurrent
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{
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get
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{
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return (Handle.Handle == Agl.aglGetCurrentContext());
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}
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}
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public override bool VSync
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{
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get
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{
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return mVSync;
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}
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set
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{
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int intVal = value ? 1 : 0;
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Agl.aglSetInteger(Handle.Handle, Agl.ParameterNames.AGL_SWAP_INTERVAL, ref intVal);
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mVSync = value;
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}
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}
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#endregion
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#region IDisposable Members
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~AglContext()
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{
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Dispose(false);
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}
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public override void Dispose()
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{
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Dispose(true);
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}
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void Dispose(bool disposing)
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{
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if (Handle.Handle == IntPtr.Zero)
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return;
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Debug.Print("Disposing of AGL context.");
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try
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{
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throw new Exception();
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}
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catch (Exception e)
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{
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Debug.WriteLine(e.StackTrace);
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}
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Agl.aglSetCurrentContext(IntPtr.Zero);
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Agl.aglSetDrawable(Handle.Handle, IntPtr.Zero);
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Debug.Print("Set drawable to null for context {0}.", Handle.Handle);
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if (Agl.aglDestroyContext(Handle.Handle) == true)
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{
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Handle = ContextHandle.Zero;
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return;
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}
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// failed to destroy context.
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Debug.WriteLine("Failed to destroy context.");
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Debug.WriteLine(Agl.ErrorString(Agl.GetError()));
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// don't throw an exception from the finalizer thread.
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if (disposing)
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{
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throw new MacOSException((OSStatus)Agl.GetError(), Agl.ErrorString(Agl.GetError()));
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}
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}
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#endregion
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#region IGraphicsContextInternal Members
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public override void LoadAll()
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{
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new OpenTK.Graphics.OpenGL.GL().LoadAll();
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}
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private const string Library = "libdl.dylib";
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[DllImport(Library, EntryPoint = "NSIsSymbolNameDefined")]
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private static extern bool NSIsSymbolNameDefined(string s);
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[DllImport(Library, EntryPoint = "NSLookupAndBindSymbol")]
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private static extern IntPtr NSLookupAndBindSymbol(string s);
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[DllImport(Library, EntryPoint = "NSAddressOfSymbol")]
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private static extern IntPtr NSAddressOfSymbol(IntPtr symbol);
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public override IntPtr GetAddress(string function)
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{
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string fname = "_" + function;
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if (!NSIsSymbolNameDefined(fname))
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return IntPtr.Zero;
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IntPtr symbol = NSLookupAndBindSymbol(fname);
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if (symbol != IntPtr.Zero)
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symbol = NSAddressOfSymbol(symbol);
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return symbol;
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}
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#endregion
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}
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}
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