private IntPtr GetAngleDisplay(IntPtr dc, GraphicsContextFlags flags, int major)
{
// default to D3D9 for ES2, but use D3D11 for ES3 as required by Angle.
var platform_type = major == 2
? Egl.PLATFORM_ANGLE_TYPE_D3D9_ANGLE
: Egl.PLATFORM_ANGLE_TYPE_D3D11_ANGLE;
if (FlagEnabled(flags, GraphicsContextFlags.AngleD3D11))
{
platform_type = Egl.PLATFORM_ANGLE_TYPE_D3D11_ANGLE;
}
else if (FlagEnabled(flags, GraphicsContextFlags.AngleD3D9))
{
platform_type = Egl.PLATFORM_ANGLE_TYPE_D3D9_ANGLE;
}
else if (FlagEnabled(flags, GraphicsContextFlags.AngleOpenGL))
{
platform_type = Egl.PLATFORM_ANGLE_TYPE_OPENGL_ANGLE;
}
else
{
// make sure the correct flag is set.
switch (platform_type)
{
case Egl.PLATFORM_ANGLE_TYPE_D3D9_ANGLE:
flags |= GraphicsContextFlags.AngleD3D9;
break;
case Egl.PLATFORM_ANGLE_TYPE_D3D11_ANGLE:
flags |= GraphicsContextFlags.AngleD3D11;
break;
case Egl.PLATFORM_ANGLE_TYPE_OPENGL_ANGLE:
flags |= GraphicsContextFlags.AngleOpenGL;
break;
}
}
var attribs = new[]
{
Egl.PLATFORM_ANGLE_TYPE_ANGLE, platform_type,
Egl.PLATFORM_ANGLE_MAX_VERSION_MAJOR_ANGLE, Egl.DONT_CARE,
Egl.PLATFORM_ANGLE_MAX_VERSION_MINOR_ANGLE, Egl.DONT_CARE,
Egl.PLATFORM_ANGLE_DEVICE_TYPE_ANGLE, Egl.PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE,
Egl.NONE
};
return(Egl.GetPlatformDisplay(
Egl.PLATFORM_ANGLE_ANGLE,
dc,
attribs
));
}
