public void Update(IWindowInfo window)
{
SetDrawable(window);
SetBufferRect(window);
Agl.aglUpdateContext(Handle.Handle);
}
GraphicsMode GetGraphicsModeFromPixelFormat(IntPtr pixelformat)
{
int r, g, b, a;
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_RED_SIZE, out r);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_GREEN_SIZE, out g);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_BLUE_SIZE, out b);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_ALPHA_SIZE, out a);
int ar, ag, ab, aa;
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_ACCUM_ALPHA_SIZE, out aa);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_ACCUM_RED_SIZE, out ar);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_ACCUM_GREEN_SIZE, out ag);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_ACCUM_BLUE_SIZE, out ab);
int depth, stencil, samples, buffers, stereo;
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_DEPTH_SIZE, out depth);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_STENCIL_SIZE, out stencil);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_SAMPLES_ARB, out samples);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_DOUBLEBUFFER, out buffers);
Agl.aglDescribePixelFormat(pixelformat, Agl.PixelFormatAttribute.AGL_STEREO, out stereo);
return(new GraphicsMode(new ColorFormat(r, g, b, a),
depth, stencil, samples, new ColorFormat(ar, ag, ab, aa), buffers + 1, stereo != 0));
}
public void MakeCurrent(IWindowInfo window)
{
if (Agl.aglSetCurrentContext(Handle.Handle) == false)
{
MyAGLReportError("aglSetCurrentContext");
}
}
void SetBufferRect(IWindowInfo carbonWindow)
{
Rect rect = API.GetControlBounds(carbonWindow.Handle);
Debug.Print("Setting buffer_rect for control.");
Debug.Print("MacOS Coordinate Rect: {0}", rect);
int[] glrect = new int[4];
if (XOffset != null)
{
glrect[0] = rect.X + XOffset();
}
else
{
glrect[0] = rect.X;
}
if (YOffset != null)
{
glrect[1] = rect.Y + YOffset();
}
else
{
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");
}
void SetDrawable(IWindowInfo 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");
}
void MyAGLReportError(string function)
{
Agl.AglError err = Agl.GetError();
if (err != Agl.AglError.NoError)
{
throw new Exception(String.Format(
"AGL Error from function {0}: {1} {2}",
function, err, Agl.ErrorString(err)));
}
}
public void SwapBuffers()
{
// this is part of the hack to avoid dropping the first frame when
// using multiple GLControls.
if (firstSwap)
{
Debug.WriteLine("--> Resetting drawable. <--");
firstSwap = false;
SetDrawable(carbonWindow);
Update(carbonWindow);
}
Agl.aglSwapBuffers(Handle.Handle);
MyAGLReportError("aglSwapBuffers");
}
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.
// Actually, it seems to crash the mono runtime. -AMK 2013
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 Exception(Agl.ErrorString(Agl.GetError()));
}
disposed = true;
}
void CreateContext(GraphicsMode mode, IWindowInfo carbonWindow, IntPtr shareContextRef, bool fullscreen)
{
Debug.Print("AGL pixel format attributes:");
// Choose a pixel format with the attributes we specified.
AGLPixelFormat pixelformat;
AglGraphicsMode selector = new AglGraphicsMode();
Mode = selector.SelectGraphicsMode(
mode.ColorFormat, mode.Depth, mode.Stencil, mode.Samples,
mode.AccumulatorFormat, mode.Buffers, mode.Stereo,
out pixelformat);
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(pixelformat, shareContextRef));
MyAGLReportError("aglCreateContext");
// Free the pixel format from memory.
Agl.aglDestroyPixelFormat(pixelformat);
MyAGLReportError("aglDestroyPixelFormat");
SetDrawable(carbonWindow);
SetBufferRect(carbonWindow);
Update(carbonWindow);
MakeCurrent(carbonWindow);
Debug.Print("context: {0}", Handle.Handle);
dummyContext = new GraphicsContext(Handle,
GetAddress,
delegate()
{
return(new ContextHandle(Agl.aglGetCurrentContext()));
});
}
public GraphicsMode SelectGraphicsMode(ColorFormat color, int depth, int stencil,
int samples, ColorFormat accum, int buffers, bool stereo, out IntPtr pixelformat)
{
do
{
pixelformat = SelectPixelFormat(
color, depth, stencil, samples, accum, buffers, stereo);
if (pixelformat == IntPtr.Zero)
{
if (!RelaxGraphicsMode(
ref color, ref depth, ref stencil, ref samples, ref accum,
ref buffers, ref stereo))
{
throw new GraphicsModeException("Requested GraphicsMode not available, error: " + Agl.GetError());
}
}
}while (pixelformat == IntPtr.Zero);
return(GetGraphicsModeFromPixelFormat(pixelformat));
}
IntPtr SelectPixelFormat(ColorFormat color, int depth, int stencil, int samples,
ColorFormat accum, int buffers, bool stereo)
{
List <int> attribs = new List <int>();
Debug.Print("Bits per pixel: {0}", color.BitsPerPixel);
if (color.BitsPerPixel > 0)
{
if (!color.IsIndexed)
{
attribs.Add((int)Agl.PixelFormatAttribute.AGL_RGBA);
}
attribs.Add((int)Agl.PixelFormatAttribute.AGL_RED_SIZE);
attribs.Add(color.Red);
attribs.Add((int)Agl.PixelFormatAttribute.AGL_GREEN_SIZE);
attribs.Add(color.Green);
attribs.Add((int)Agl.PixelFormatAttribute.AGL_BLUE_SIZE);
attribs.Add(color.Blue);
attribs.Add((int)Agl.PixelFormatAttribute.AGL_ALPHA_SIZE);
attribs.Add(color.Alpha);
}
Debug.Print("Depth: {0}", depth);
if (depth > 0)
{
attribs.Add((int)Agl.PixelFormatAttribute.AGL_DEPTH_SIZE);
attribs.Add(depth);
}
if (buffers > 1)
{
attribs.Add((int)Agl.PixelFormatAttribute.AGL_DOUBLEBUFFER);
}
if (stencil > 0)
{
attribs.Add((int)Agl.PixelFormatAttribute.AGL_STENCIL_SIZE);
attribs.Add(stencil);
}
if (accum.BitsPerPixel > 0)
{
attribs.Add((int)Agl.PixelFormatAttribute.AGL_ACCUM_ALPHA_SIZE);
attribs.Add(accum.Alpha);
attribs.Add((int)Agl.PixelFormatAttribute.AGL_ACCUM_BLUE_SIZE);
attribs.Add(accum.Blue);
attribs.Add((int)Agl.PixelFormatAttribute.AGL_ACCUM_GREEN_SIZE);
attribs.Add(accum.Green);
attribs.Add((int)Agl.PixelFormatAttribute.AGL_ACCUM_RED_SIZE);
attribs.Add(accum.Red);
}
if (samples > 0)
{
attribs.Add((int)Agl.PixelFormatAttribute.AGL_SAMPLE_BUFFERS_ARB);
attribs.Add(1);
attribs.Add((int)Agl.PixelFormatAttribute.AGL_SAMPLES_ARB);
attribs.Add(samples);
}
if (stereo)
{
attribs.Add((int)Agl.PixelFormatAttribute.AGL_STEREO);
}
attribs.Add(0);
attribs.Add(0);
IntPtr pixelformat = Agl.aglChoosePixelFormat(IntPtr.Zero, 0, attribs.ToArray());
return(pixelformat);
}