public static EvDevDevice Open(string device)
{
var fd = NativeUnsafeMethods.open(device, 2048, 0);
if (fd <= 0)
{
throw new Exception($"Unable to open {device} code {Marshal.GetLastWin32Error()}");
}
IntPtr dev;
var rc = NativeUnsafeMethods.libevdev_new_from_fd(fd, out dev);
if (rc < 0)
{
NativeUnsafeMethods.close(fd);
throw new Exception($"Unable to initialize evdev for {device} code {Marshal.GetLastWin32Error()}");
}
return(new EvDevDevice(fd, dev));
}
/// <summary>
/// Create a Linux frame buffer device output
/// </summary>
/// <param name="fileName">The frame buffer device name.
/// Defaults to the value in environment variable FRAMEBUFFER or /dev/fb0 when FRAMEBUFFER is not set</param>
/// <param name="format">The required pixel format for the frame buffer.
/// A null value will leave the frame buffer in the current pixel format.
/// Otherwise sets the frame buffer to the required format</param>
public FbdevOutput(string fileName, PixelFormat?format)
{
fileName ??= Environment.GetEnvironmentVariable("FRAMEBUFFER") ?? "/dev/fb0";
_fd = NativeUnsafeMethods.open(fileName, 2, 0);
if (_fd <= 0)
{
throw new Exception("Error: " + Marshal.GetLastWin32Error());
}
try
{
Init(format);
}
catch
{
Dispose();
throw;
}
}
public LinuxFramebuffer(string fileName = null, Vector?dpi = null)
{
_dpi = dpi ?? new Vector(96, 96);
fileName = fileName ?? Environment.GetEnvironmentVariable("FRAMEBUFFER") ?? "/dev/fb0";
_fd = NativeUnsafeMethods.open(fileName, 2, 0);
if (_fd <= 0)
{
throw new Exception("Error: " + Marshal.GetLastWin32Error());
}
try
{
Init();
}
catch
{
Dispose();
throw;
}
}