static IntPtr CreateDisplay(EglInterface egl, int platformType, IntPtr platformDisplay, int[] attrs)
{
var display = IntPtr.Zero;
if (platformType == -1 && platformDisplay == IntPtr.Zero)
{
if (display == IntPtr.Zero)
{
display = egl.GetDisplay(IntPtr.Zero);
}
}
else
{
if (egl.GetPlatformDisplayEXT == null)
{
throw new OpenGlException("eglGetPlatformDisplayEXT is not supported by libegl");
}
display = egl.GetPlatformDisplayEXT(platformType, platformDisplay, attrs);
}
if (display == IntPtr.Zero)
{
throw OpenGlException.GetFormattedException("eglGetDisplay", egl);
}
return(display);
}
public IDisposable MakeCurrent(EglSurface surface)
{
Monitor.Enter(_lock);
var success = false;
try
{
var old = new RestoreContext(_egl, _disp.Handle, _lock);
var surf = surface ?? OffscreenSurface;
_egl.MakeCurrent(_disp.Handle, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
if (!_egl.MakeCurrent(_disp.Handle, surf?.DangerousGetHandle() ?? IntPtr.Zero,
surf?.DangerousGetHandle() ?? IntPtr.Zero, Context))
{
throw OpenGlException.GetFormattedException("eglMakeCurrent", _egl);
}
success = true;
return(old);
}
finally
{
if (!success)
{
Monitor.Enter(_lock);
}
}
}
public EglContext CreateContext(IGlContext share)
{
if (share != null && !SupportsSharing)
{
throw new NotSupportedException("Context sharing is not supported by this display");
}
if ((_surfaceType | EGL_PBUFFER_BIT) == 0)
{
throw new InvalidOperationException("Platform doesn't support PBUFFER surfaces");
}
var shareCtx = (EglContext)share;
var ctx = _egl.CreateContext(_display, _config, shareCtx?.Context ?? IntPtr.Zero, _contextAttributes);
if (ctx == IntPtr.Zero)
{
throw OpenGlException.GetFormattedException("eglCreateContext", _egl);
}
var surf = _egl.CreatePBufferSurface(_display, _config, new[]
{
EGL_WIDTH, 1,
EGL_HEIGHT, 1,
EGL_NONE
});
if (surf == IntPtr.Zero)
{
throw OpenGlException.GetFormattedException("eglCreatePBufferSurface", _egl);
}
var rv = new EglContext(this, _egl, shareCtx, ctx, context => new EglSurface(this, context, surf),
_version, _sampleCount, _stencilSize);
return(rv);
}
public EglSurface CreateWindowSurface(IntPtr window)
{
using (PrimaryContext.MakeCurrent())
{
var s = Display.EglInterface.CreateWindowSurface(Display.Handle, Display.Config, window,
new[] { EGL_NONE, EGL_NONE });
if (s == IntPtr.Zero)
{
throw OpenGlException.GetFormattedException("eglCreateWindowSurface", Display.EglInterface);
}
return(new EglSurface(Display, PrimaryEglContext, s));
}
}
public EglSurface CreatePBufferFromClientBuffer(int bufferType, IntPtr handle, int[] attribs)
{
using (PrimaryContext.MakeCurrent())
{
var s = Display.EglInterface.CreatePbufferFromClientBuffer(Display.Handle, bufferType, handle,
Display.Config, attribs);
if (s == IntPtr.Zero)
{
throw OpenGlException.GetFormattedException("eglCreatePbufferFromClientBuffer", Display.EglInterface);
}
return(new EglSurface(Display, PrimaryEglContext, s));
}
}
public EglContext CreateContext(EglContext share, EglSurface offscreenSurface)
{
if (share != null && !SupportsSharing)
{
throw new NotSupportedException("Context sharing is not supported by this display");
}
var ctx = _egl.CreateContext(_display, _config, share?.Context ?? IntPtr.Zero, _contextAttributes);
if (ctx == IntPtr.Zero)
{
throw OpenGlException.GetFormattedException("eglCreateContext", _egl);
}
var rv = new EglContext(this, _egl, share, ctx, _ => offscreenSurface, _version, _sampleCount, _stencilSize);
rv.MakeCurrent(null);
return(rv);
}
public EglDisplay(EglInterface egl, bool supportsSharing, IntPtr display)
{
_egl = egl;
SupportsSharing = supportsSharing;
_display = display;
if (_display == IntPtr.Zero)
{
throw new ArgumentException();
}
if (!_egl.Initialize(_display, out var major, out var minor))
{
throw OpenGlException.GetFormattedException("eglInitialize", _egl);
}
var glProfiles = AvaloniaLocator.Current.GetService <AngleOptions>()?.GlProfiles
?? new[]
{
new GlVersion(GlProfileType.OpenGLES, 3, 0),
new GlVersion(GlProfileType.OpenGLES, 2, 0)
};
var cfgs = glProfiles.Select(x =>
{
var typeBit = EGL_OPENGL_ES3_BIT;
switch (x.Major)
{
case 2:
typeBit = EGL_OPENGL_ES2_BIT;
break;
case 1:
typeBit = EGL_OPENGL_ES_BIT;
break;
}
return(new
{
Attributes = new[]
{
EGL_CONTEXT_MAJOR_VERSION, x.Major,
EGL_CONTEXT_MINOR_VERSION, x.Minor,
EGL_NONE
},
Api = EGL_OPENGL_ES_API,
RenderableTypeBit = typeBit,
Version = x
});
});
foreach (var cfg in cfgs)
{
if (!_egl.BindApi(cfg.Api))
{
continue;
}
foreach (var surfaceType in new[] { EGL_PBUFFER_BIT | EGL_WINDOW_BIT, EGL_WINDOW_BIT })
{
foreach (var stencilSize in new[] { 8, 1, 0 })
{
foreach (var depthSize in new [] { 8, 1, 0 })
{
var attribs = new[]
{
EGL_SURFACE_TYPE, surfaceType,
EGL_RENDERABLE_TYPE, cfg.RenderableTypeBit,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_STENCIL_SIZE, stencilSize,
EGL_DEPTH_SIZE, depthSize,
EGL_NONE
};
if (!_egl.ChooseConfig(_display, attribs, out _config, 1, out int numConfigs))
{
continue;
}
if (numConfigs == 0)
{
continue;
}
_contextAttributes = cfg.Attributes;
_surfaceType = surfaceType;
_version = cfg.Version;
_egl.GetConfigAttrib(_display, _config, EGL_SAMPLES, out _sampleCount);
_egl.GetConfigAttrib(_display, _config, EGL_STENCIL_SIZE, out _stencilSize);
goto Found;
}
}
}
}
Found:
if (_contextAttributes == null)
{
throw new OpenGlException("No suitable EGL config was found");
}
}
