public EglContext(EglDisplay display, EglInterface egl, EglContext sharedWith, IntPtr ctx, Func <EglContext, EglSurface> offscreenSurface,
GlVersion version, int sampleCount, int stencilSize)
{
_disp = display;
_egl = egl;
_sharedWith = sharedWith;
Context = ctx;
OffscreenSurface = offscreenSurface(this);
Version = version;
SampleCount = sampleCount;
StencilSize = stencilSize;
using (MakeCurrent())
GlInterface = GlInterface.FromNativeUtf8GetProcAddress(version, b => _egl.GetProcAddress(b));
}
public GlxDisplay(X11Info x11)
{
_x11 = x11;
var baseAttribs = new[]
{
GLX_X_RENDERABLE, 1,
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_DOUBLEBUFFER, 1,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_ALPHA_SIZE, 8,
GLX_DEPTH_SIZE, 1,
GLX_STENCIL_SIZE, 8,
};
foreach (var attribs in new[]
{
//baseAttribs.Concat(multiattribs),
baseAttribs,
})
{
var ptr = GlxChooseFBConfig(_x11.Display, x11.DefaultScreen,
attribs, out var count);
for (var c = 0; c < count; c++)
{
var visual = GlxGetVisualFromFBConfig(_x11.Display, ptr[c]);
// We prefer 32 bit visuals
if (_fbconfig == IntPtr.Zero || visual->depth == 32)
{
_fbconfig = ptr[c];
_visual = visual;
if (visual->depth == 32)
{
break;
}
}
}
if (_fbconfig != IntPtr.Zero)
{
break;
}
}
if (_fbconfig == IntPtr.Zero)
{
throw new OpenGlException("Unable to choose FBConfig");
}
if (_visual == null)
{
throw new OpenGlException("Unable to get visual info from FBConfig");
}
if (GlxGetFBConfigAttrib(_x11.Display, _fbconfig, GLX_SAMPLES, out var samples) == 0)
{
SampleCount = samples;
}
if (GlxGetFBConfigAttrib(_x11.Display, _fbconfig, GLX_STENCIL_SIZE, out var stencil) == 0)
{
StencilSize = stencil;
}
ImmediateContext = CreateContext(null);
DeferredContext = CreateContext(ImmediateContext);
ImmediateContext.MakeCurrent();
GlInterface = GlInterface.FromNativeUtf8GetProcAddress(p => GlxGetProcAddress(p));
}