Opentk/Source/OpenTK/Platform/X11/X11GraphicsMode.cs

148 lines
6.5 KiB
C#

#region --- License ---
/* Licensed under the MIT/X11 license.
* Copyright (c) 2006-2008 the OpenTK Team.
* This notice may not be removed from any source distribution.
* See license.txt for licensing detailed licensing details.
*/
#endregion
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;
using OpenTK.Graphics;
namespace OpenTK.Platform.X11
{
class X11GraphicsMode : IGraphicsMode
{
internal X11GraphicsMode()
{
}
public GraphicsMode SelectGraphicsMode(ColorFormat color, int depth, int stencil, int samples, ColorFormat accum,
int buffers, bool stereo)
{
GraphicsMode gfx; // The actual GraphicsMode that will be selected.
List<int> visualAttributes = new List<int>();
IntPtr visual;
Debug.Print("Bits per pixel: {0}", color.BitsPerPixel);
if (color.BitsPerPixel > 0)
{
if (!color.IsIndexed)
visualAttributes.Add((int)GLXAttribute.RGBA);
visualAttributes.Add((int)GLXAttribute.RED_SIZE);
visualAttributes.Add(color.Red);
visualAttributes.Add((int)GLXAttribute.GREEN_SIZE);
visualAttributes.Add(color.Green);
visualAttributes.Add((int)GLXAttribute.BLUE_SIZE);
visualAttributes.Add(color.Blue);
visualAttributes.Add((int)GLXAttribute.ALPHA_SIZE);
visualAttributes.Add(color.Alpha);
}
Debug.Print("Depth: {0}", depth);
if (depth > 0)
{
visualAttributes.Add((int)GLXAttribute.DEPTH_SIZE);
visualAttributes.Add(depth);
}
if (buffers > 1)
visualAttributes.Add((int)GLXAttribute.DOUBLEBUFFER);
if (stencil > 1)
{
visualAttributes.Add((int)GLXAttribute.STENCIL_SIZE);
visualAttributes.Add(stencil);
}
if (accum.BitsPerPixel > 0)
{
visualAttributes.Add((int)GLXAttribute.ACCUM_ALPHA_SIZE);
visualAttributes.Add(accum.Alpha);
visualAttributes.Add((int)GLXAttribute.ACCUM_BLUE_SIZE);
visualAttributes.Add(accum.Blue);
visualAttributes.Add((int)GLXAttribute.ACCUM_GREEN_SIZE);
visualAttributes.Add(accum.Green);
visualAttributes.Add((int)GLXAttribute.ACCUM_RED_SIZE);
visualAttributes.Add(accum.Red);
}
if (stereo)
visualAttributes.Add((int)GLXAttribute.STEREO);
visualAttributes.Add((int)0);
// Select a visual that matches the parameters set by the user.
lock (API.Lock)
{
IntPtr display = API.DefaultDisplay; //Functions.XOpenDisplay(IntPtr.Zero);
int screen = Functions.XDefaultScreen(display);
IntPtr root = Functions.XRootWindow(display, screen);
Debug.Print("Display: {0}, Screen: {1}, RootWindow: {2}", display, screen, root);
visual = Glx.ChooseVisual(display, screen, visualAttributes.ToArray());
if (visual == IntPtr.Zero)
throw new GraphicsContextException("Requested GraphicsMode not available.");
XVisualInfo info = (XVisualInfo)Marshal.PtrToStructure(visual, typeof(XVisualInfo));
// See what we *really* got:
int r, g, b, a;
Glx.GetConfig(display, ref info, GLXAttribute.ALPHA_SIZE, out a);
Glx.GetConfig(display, ref info, GLXAttribute.RED_SIZE, out r);
Glx.GetConfig(display, ref info, GLXAttribute.GREEN_SIZE, out g);
Glx.GetConfig(display, ref info, GLXAttribute.BLUE_SIZE, out b);
int ar, ag, ab, aa;
Glx.GetConfig(display, ref info, GLXAttribute.ACCUM_ALPHA_SIZE, out aa);
Glx.GetConfig(display, ref info, GLXAttribute.ACCUM_RED_SIZE, out ar);
Glx.GetConfig(display, ref info, GLXAttribute.ACCUM_GREEN_SIZE, out ag);
Glx.GetConfig(display, ref info, GLXAttribute.ACCUM_BLUE_SIZE, out ab);
Glx.GetConfig(display, ref info, GLXAttribute.DEPTH_SIZE, out depth);
Glx.GetConfig(display, ref info, GLXAttribute.STENCIL_SIZE, out stencil);
Glx.GetConfig(display, ref info, GLXAttribute.SAMPLES, out samples);
Glx.GetConfig(display, ref info, GLXAttribute.DOUBLEBUFFER, out buffers);
++buffers; // the above lines returns 0 - false and 1 - true.
int st;
Glx.GetConfig(display, ref info, GLXAttribute.STEREO, out st);
stereo = st != 0;
gfx = new GraphicsMode(info.visualid, new ColorFormat(r, g, b, a), depth, stencil, samples,
new ColorFormat(ar, ag, ab, aa), buffers, stereo);
//Functions.XCloseDisplay(display);
}
// Prepare Windows.Forms for creating OpenGL drawables.
lock (API.Lock)
{
Type xplatui = Type.GetType("System.Windows.Forms.XplatUIX11, System.Windows.Forms");
IntPtr display = (IntPtr)xplatui.GetField("DisplayHandle",
System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic).GetValue(null);
IntPtr root = (IntPtr)xplatui.GetField("RootWindow",
System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic).GetValue(null);
int screen = (int)xplatui.GetField("ScreenNo",
System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic).GetValue(null);
xplatui.GetField("CustomVisual", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic)
.SetValue(null, visual);
xplatui.GetField("CustomColormap", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic)
.SetValue(null, Functions.XCreateColormap(display, root, visual, 0));
}
Functions.XFree(visual);
return gfx;
}
}
}