Opentk/Source/OpenTK/Platform/MacOS/AglContext.cs

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//
//
// AglContext.cs
//
// Created by Erik Ylvisaker on 3/17/08.
// Copyright 2008. All rights reserved.
//
//
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace OpenTK.Platform.MacOS
{
using Carbon;
using Graphics;
using AGLRendererInfo = IntPtr;
using AGLPixelFormat = IntPtr;
using AGLContext = IntPtr;
using AGLPbuffer = IntPtr;
class AglContext : DesktopGraphicsContext
{
bool mVSync = false;
// Todo: keep track of which display adapter was specified when the context was created.
// IntPtr displayID;
GraphicsMode graphics_mode;
CarbonWindowInfo carbonWindow;
IntPtr shareContextRef;
DisplayDevice device;
bool mIsFullscreen = false;
public AglContext(GraphicsMode mode, IWindowInfo window, IGraphicsContext shareContext)
{
Debug.Print("Context Type: {0}", shareContext);
Debug.Print("Window info: {0}", window);
this.graphics_mode = mode;
this.carbonWindow = (CarbonWindowInfo)window;
if (shareContext is AglContext)
shareContextRef = ((AglContext)shareContext).Handle.Handle;
if (shareContext is GraphicsContext)
{
ContextHandle shareHandle = shareContext != null ? (shareContext as IGraphicsContextInternal).Context : (ContextHandle)IntPtr.Zero;
shareContextRef = shareHandle.Handle;
}
if (shareContextRef == IntPtr.Zero)
{
Debug.Print("No context sharing will take place.");
}
CreateContext(mode, carbonWindow, shareContextRef, true);
}
public AglContext(ContextHandle handle, IWindowInfo window, IGraphicsContext shareContext)
{
if (handle == ContextHandle.Zero)
throw new ArgumentException("handle");
if (window == null)
throw new ArgumentNullException("window");
Handle = handle;
carbonWindow = (CarbonWindowInfo)window;
}
private void AddPixelAttrib(List<int> aglAttributes, Agl.PixelFormatAttribute pixelFormatAttribute)
{
Debug.Print(pixelFormatAttribute.ToString());
aglAttributes.Add((int)pixelFormatAttribute);
}
private void AddPixelAttrib(List<int> aglAttributes, Agl.PixelFormatAttribute pixelFormatAttribute, int value)
{
Debug.Print("{0} : {1}", pixelFormatAttribute, value);
aglAttributes.Add((int)pixelFormatAttribute);
aglAttributes.Add(value);
}
void CreateContext(GraphicsMode mode, CarbonWindowInfo carbonWindow, IntPtr shareContextRef, bool fullscreen)
{
List<int> aglAttributes = new List<int>();
Debug.Print("AGL pixel format attributes:");
Debug.Indent();
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_RGBA);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_DOUBLEBUFFER);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_RED_SIZE, mode.ColorFormat.Red);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_GREEN_SIZE, mode.ColorFormat.Green);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_BLUE_SIZE, mode.ColorFormat.Blue);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ALPHA_SIZE, mode.ColorFormat.Alpha);
if (mode.Depth > 0)
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_DEPTH_SIZE, mode.Depth);
if (mode.Stencil > 0)
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_STENCIL_SIZE, mode.Stencil);
if (mode.AccumulatorFormat.BitsPerPixel > 0)
{
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ACCUM_RED_SIZE, mode.AccumulatorFormat.Red);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ACCUM_GREEN_SIZE, mode.AccumulatorFormat.Green);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ACCUM_BLUE_SIZE, mode.AccumulatorFormat.Blue);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_ACCUM_ALPHA_SIZE, mode.AccumulatorFormat.Alpha);
}
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if (mode.Samples > 1)
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{
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_SAMPLE_BUFFERS_ARB, 1);
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_SAMPLES_ARB, mode.Samples);
}
if (fullscreen)
{
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_FULLSCREEN);
}
AddPixelAttrib(aglAttributes, Agl.PixelFormatAttribute.AGL_NONE);
Debug.Unindent();
Debug.Write("Attribute array: ");
for (int i = 0; i < aglAttributes.Count; i++)
Debug.Write(aglAttributes[i].ToString() + " ");
Debug.WriteLine("");
AGLPixelFormat myAGLPixelFormat;
// Choose a pixel format with the attributes we specified.
if (fullscreen)
{
IntPtr gdevice;
IntPtr cgdevice = GetQuartzDevice(carbonWindow);
if (cgdevice == IntPtr.Zero)
cgdevice = QuartzDisplayDeviceDriver.MainDisplay;
OSStatus status = Carbon.API.DMGetGDeviceByDisplayID(cgdevice, out gdevice, false);
if (status != OSStatus.NoError)
throw new MacOSException(status, "DMGetGDeviceByDisplayID failed.");
myAGLPixelFormat = Agl.aglChoosePixelFormat(ref gdevice, 1, aglAttributes.ToArray());
Agl.AglError err = Agl.GetError();
if (err == Agl.AglError.BadPixelFormat)
{
Debug.Print("Failed to create full screen pixel format.");
Debug.Print("Trying again to create a non-fullscreen pixel format.");
CreateContext(mode, carbonWindow, shareContextRef, false);
return;
}
}
else
{
myAGLPixelFormat = Agl.aglChoosePixelFormat(IntPtr.Zero, 0, aglAttributes.ToArray());
MyAGLReportError("aglChoosePixelFormat");
}
Debug.Print("Creating AGL context. Sharing with {0}", shareContextRef);
// create the context and share it with the share reference.
Handle = new ContextHandle(Agl.aglCreateContext(myAGLPixelFormat, shareContextRef));
MyAGLReportError("aglCreateContext");
// Free the pixel format from memory.
Agl.aglDestroyPixelFormat(myAGLPixelFormat);
MyAGLReportError("aglDestroyPixelFormat");
Debug.Print("IsControl: {0}", carbonWindow.IsControl);
SetDrawable(carbonWindow);
SetBufferRect(carbonWindow);
Update(carbonWindow);
MakeCurrent(carbonWindow);
Debug.Print("context: {0}", Handle.Handle);
}
private IntPtr GetQuartzDevice(CarbonWindowInfo carbonWindow)
{
IntPtr windowRef = carbonWindow.WindowRef;
if (CarbonGLNative.WindowRefMap.ContainsKey(windowRef) == false)
return IntPtr.Zero;
WeakReference nativeRef = CarbonGLNative.WindowRefMap[windowRef];
if (nativeRef.IsAlive == false)
return IntPtr.Zero;
CarbonGLNative window = nativeRef.Target as CarbonGLNative;
if (window == null)
return IntPtr.Zero;
return QuartzDisplayDeviceDriver.HandleTo(window.TargetDisplayDevice);
}
void SetBufferRect(CarbonWindowInfo carbonWindow)
{
if (carbonWindow.IsControl == false)
return;
// Todo: See if there is a way around using WinForms.
throw new NotImplementedException();
#if false
System.Windows.Forms.Control ctrl = Control.FromHandle(carbonWindow.WindowRef);
if (ctrl.TopLevelControl == null)
return;
Rect rect = API.GetControlBounds(carbonWindow.WindowRef);
System.Windows.Forms.Form frm = (System.Windows.Forms.Form)ctrl.TopLevelControl;
System.Drawing.Point loc = frm.PointToClient(ctrl.PointToScreen(System.Drawing.Point.Empty));
rect.X = (short)loc.X;
rect.Y = (short)loc.Y;
Debug.Print("Setting buffer_rect for control.");
Debug.Print("MacOS Coordinate Rect: {0}", rect);
rect.Y = (short)(ctrl.TopLevelControl.ClientSize.Height - rect.Y - rect.Height);
Debug.Print(" AGL Coordinate Rect: {0}", rect);
int[] glrect = new int[4];
glrect[0] = rect.X;
glrect[1] = rect.Y;
glrect[2] = rect.Width;
glrect[3] = rect.Height;
Agl.aglSetInteger(Handle.Handle, Agl.ParameterNames.AGL_BUFFER_RECT, glrect);
MyAGLReportError("aglSetInteger");
Agl.aglEnable(Handle.Handle, Agl.ParameterNames.AGL_BUFFER_RECT);
MyAGLReportError("aglEnable");
#endif
}
void SetDrawable(CarbonWindowInfo carbonWindow)
{
IntPtr windowPort = GetWindowPortForWindowInfo(carbonWindow);
//Debug.Print("Setting drawable for context {0} to window port: {1}", Handle.Handle, windowPort);
Agl.aglSetDrawable(Handle.Handle, windowPort);
MyAGLReportError("aglSetDrawable");
}
private static IntPtr GetWindowPortForWindowInfo(CarbonWindowInfo carbonWindow)
{
IntPtr windowPort;
if (carbonWindow.IsControl)
{
IntPtr controlOwner = API.GetControlOwner(carbonWindow.WindowRef);
windowPort = API.GetWindowPort(controlOwner);
}
else
windowPort = API.GetWindowPort(carbonWindow.WindowRef);
return windowPort;
}
public override void Update(IWindowInfo window)
{
CarbonWindowInfo carbonWindow = (CarbonWindowInfo)window;
if (carbonWindow.GoFullScreenHack)
{
carbonWindow.GoFullScreenHack = false;
CarbonGLNative wind = GetCarbonWindow(carbonWindow);
if (wind != null)
wind.SetFullscreen(this);
else
Debug.Print("Could not find window!");
return;
}
else if (carbonWindow.GoWindowedHack)
{
carbonWindow.GoWindowedHack = false;
CarbonGLNative wind = GetCarbonWindow(carbonWindow);
if (wind != null)
wind.UnsetFullscreen(this);
else
Debug.Print("Could not find window!");
}
if (mIsFullscreen)
return;
SetDrawable(carbonWindow);
SetBufferRect(carbonWindow);
Agl.aglUpdateContext(Handle.Handle);
}
private CarbonGLNative GetCarbonWindow(CarbonWindowInfo carbonWindow)
{
WeakReference r = CarbonGLNative.WindowRefMap[carbonWindow.WindowRef];
if (r.IsAlive)
{
return (CarbonGLNative)r.Target;
}
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else
return null;
}
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void MyAGLReportError(string function)
{
Agl.AglError err = Agl.GetError();
if (err != Agl.AglError.NoError)
throw new MacOSException((OSStatus)err, string.Format("AGL Error from function {0}: {1} {2}", function, err, Agl.ErrorString(err)));
}
bool firstFullScreen = false;
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internal void SetFullScreen(CarbonWindowInfo info, out int width, out int height)
{
CarbonGLNative wind = GetCarbonWindow(info);
Debug.Print("Switching to full screen {0}x{1} on context {2}", wind.TargetDisplayDevice.Width, wind.TargetDisplayDevice.Height, Handle.Handle);
CG.DisplayCapture(GetQuartzDevice(info));
Agl.aglSetFullScreen(Handle.Handle, wind.TargetDisplayDevice.Width, wind.TargetDisplayDevice.Height, 0, 0);
MakeCurrent(info);
width = wind.TargetDisplayDevice.Width;
height = wind.TargetDisplayDevice.Height;
// This is a weird hack to workaround a bug where the first time a context
// is made fullscreen, we just end up with a blank screen. So we undo it as fullscreen
// and redo it as fullscreen.
if (firstFullScreen == false)
{
firstFullScreen = true;
UnsetFullScreen(info);
SetFullScreen(info, out width, out height);
}
mIsFullscreen = true;
}
internal void UnsetFullScreen(CarbonWindowInfo windowInfo)
{
Debug.Print("Unsetting AGL fullscreen.");
Agl.aglSetDrawable(Handle.Handle, IntPtr.Zero);
Agl.aglUpdateContext(Handle.Handle);
CG.DisplayRelease(GetQuartzDevice(windowInfo));
Debug.Print("Resetting drawable.");
SetDrawable(windowInfo);
mIsFullscreen = false;
}
#region IGraphicsContext Members
bool firstSwap = false;
public override void SwapBuffers()
{
// this is part of the hack to avoid dropping the first frame when
// using multiple GLControls.
if (firstSwap == false && carbonWindow.IsControl)
{
Debug.WriteLine("--> Resetting drawable. <--");
firstSwap = true;
SetDrawable(carbonWindow);
Update(carbonWindow);
}
Agl.aglSwapBuffers(Handle.Handle);
MyAGLReportError("aglSwapBuffers");
}
public override void MakeCurrent(IWindowInfo window)
{
if (Agl.aglSetCurrentContext(Handle.Handle) == false)
MyAGLReportError("aglSetCurrentContext");
}
public override bool IsCurrent
{
get { return (Handle.Handle == Agl.aglGetCurrentContext()); }
}
public override bool VSync
{
get { return mVSync; }
set
{
int intVal = value ? 1 : 0;
Agl.aglSetInteger(Handle.Handle, Agl.ParameterNames.AGL_SWAP_INTERVAL, ref intVal);
mVSync = value;
}
}
#endregion
#region IDisposable Members
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~AglContext()
{
Dispose(false);
}
public override void Dispose()
{
Dispose(true);
}
void Dispose(bool disposing)
{
if (IsDisposed || Handle.Handle == IntPtr.Zero)
return;
Debug.Print("Disposing of AGL context.");
Agl.aglSetCurrentContext(IntPtr.Zero);
//Debug.Print("Setting drawable to null for context {0}.", Handle.Handle);
//Agl.aglSetDrawable(Handle.Handle, IntPtr.Zero);
// I do not know MacOS allows us to destroy a context from a separate thread,
// like the finalizer thread. It's untested, but worst case is probably
// an exception on application exit, which would be logged to the console.
Debug.Print("Destroying context");
if (Agl.aglDestroyContext(Handle.Handle) == true)
{
Debug.Print("Context destruction completed successfully.");
Handle = ContextHandle.Zero;
return;
}
// failed to destroy context.
Debug.WriteLine("Failed to destroy context.");
Debug.WriteLine(Agl.ErrorString(Agl.GetError()));
// don't throw an exception from the finalizer thread.
if (disposing)
{
throw new MacOSException((OSStatus)Agl.GetError(), Agl.ErrorString(Agl.GetError()));
}
IsDisposed = true;
}
#endregion
#region IGraphicsContextInternal Members
private const string Library = "libdl.dylib";
[DllImport(Library, EntryPoint = "NSIsSymbolNameDefined")]
private static extern bool NSIsSymbolNameDefined(string s);
[DllImport(Library, EntryPoint = "NSLookupAndBindSymbol")]
private static extern IntPtr NSLookupAndBindSymbol(string s);
[DllImport(Library, EntryPoint = "NSAddressOfSymbol")]
private static extern IntPtr NSAddressOfSymbol(IntPtr symbol);
public override IntPtr GetAddress(string function)
{
string fname = "_" + function;
if (!NSIsSymbolNameDefined(fname))
return IntPtr.Zero;
IntPtr symbol = NSLookupAndBindSymbol(fname);
if (symbol != IntPtr.Zero)
symbol = NSAddressOfSymbol(symbol);
return symbol;
}
#endregion
}
}