public void Dispose()
{
VSync();
NativeUnsafeMethods.memcpy(_address, Address, new IntPtr(RowBytes * Size.Height));
Marshal.FreeHGlobal(Address);
Address = IntPtr.Zero;
}
private void ReleaseUnmanagedResources()
{
if (_mappedAddress != IntPtr.Zero)
{
NativeUnsafeMethods.munmap(_mappedAddress, _mappedLength);
_mappedAddress = IntPtr.Zero;
}
if (_fd == 0)
return; }
public input_event?NextEvent()
{
input_event ev;
if (NativeUnsafeMethods.libevdev_next_event(_dev, 2, out ev) == 0)
{
return(ev);
}
return(null);
}
private static List <EvDevDevice> OpenMouseDevices()
{
var rv = new List <EvDevDevice>();
foreach (var dev in Directory.GetFiles("/dev/input", "event*").Select(Open))
{
if (!dev.IsMouse)
{
NativeUnsafeMethods.close(dev.Fd);
}
else
{
rv.Add(dev);
}
}
return(rv);
}
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;
}
}
public EvDevDevice(int fd, IntPtr dev)
{
Fd = fd;
_dev = dev;
Name = Marshal.PtrToStringAnsi(NativeUnsafeMethods.libevdev_get_name(_dev));
foreach (EvType type in Enum.GetValues(typeof(EvType)))
{
if (NativeUnsafeMethods.libevdev_has_event_type(dev, type) != 0)
{
EventTypes.Add(type);
}
}
var ptr = NativeUnsafeMethods.libevdev_get_abs_info(dev, (int)AbsAxis.ABS_X);
if (ptr != null)
{
AbsX = *ptr;
}
ptr = NativeUnsafeMethods.libevdev_get_abs_info(dev, (int)AbsAxis.ABS_Y);
if (ptr != null)
{
AbsY = *ptr;
}
}
void Init()
{
fixed(void *pnfo = &_varInfo)
{
if (-1 == NativeUnsafeMethods.ioctl(_fd, FbIoCtl.FBIOGET_VSCREENINFO, pnfo))
{
throw new Exception("FBIOGET_VSCREENINFO error: " + Marshal.GetLastWin32Error());
}
SetBpp();
_varInfo.yoffset = 100;
if (-1 == NativeUnsafeMethods.ioctl(_fd, FbIoCtl.FBIOPUT_VSCREENINFO, pnfo))
{
_varInfo.transp = new fb_bitfield();
}
if (-1 == NativeUnsafeMethods.ioctl(_fd, FbIoCtl.FBIOPUT_VSCREENINFO, pnfo))
{
throw new Exception("FBIOPUT_VSCREENINFO error: " + Marshal.GetLastWin32Error());
}
if (-1 == NativeUnsafeMethods.ioctl(_fd, FbIoCtl.FBIOGET_VSCREENINFO, pnfo))
{
throw new Exception("FBIOGET_VSCREENINFO error: " + Marshal.GetLastWin32Error());
}
if (_varInfo.bits_per_pixel != 32)
{
throw new Exception("Unable to set 32-bit display mode");
}
}
fixed(void *pnfo = &_fixedInfo)
if (-1 == NativeUnsafeMethods.ioctl(_fd, FbIoCtl.FBIOGET_FSCREENINFO, pnfo))
{
throw new Exception("FBIOGET_FSCREENINFO error: " + Marshal.GetLastWin32Error());
}
_mappedLength = new IntPtr(_fixedInfo.line_length * _varInfo.yres);
_mappedAddress = NativeUnsafeMethods.mmap(IntPtr.Zero, _mappedLength, 3, 1, _fd, IntPtr.Zero);
if (_mappedAddress == new IntPtr(-1))
{
throw new Exception($"Unable to mmap {_mappedLength} bytes, error {Marshal.GetLastWin32Error()}");
fixed(fb_fix_screeninfo *pnfo = &_fixedInfo)
{
int idlen;
for (idlen = 0; idlen < 16 && pnfo->id[idlen] != 0; idlen++)
{
;
}
Id = Encoding.ASCII.GetString(pnfo->id, idlen);
}
}
void SetBpp()
{
_varInfo.bits_per_pixel = 32;
_varInfo.grayscale = 0;
_varInfo.red = _varInfo.blue = _varInfo.green = _varInfo.transp = new fb_bitfield
{
length = 8
};
_varInfo.green.offset = 8;
_varInfo.blue.offset = 16;
_varInfo.transp.offset = 24;
}
void VSync()
{
NativeUnsafeMethods.ioctl(_fb, FbIoCtl.FBIO_WAITFORVSYNC, null);
}
