public int Write(byte[] data)
{
unsafe
{
fixed(byte *pdata = data)
{
return(Gbm.BOWrite(buffer, (IntPtr)pdata, (IntPtr)data.Length));
}
}
}
private static void HandleDestroyFB(BufferObject bo, IntPtr data)
{
IntPtr gbm = bo.Device;
int fb = data.ToInt32();
Debug.Print("[KMS] Destroying framebuffer {0}", fb);
if (fb != 0)
{
Drm.ModeRmFB(Gbm.DeviceGetFD(gbm), fb);
}
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
Debug.Print("[KMS] Destroying window {0}.", window.Handle);
window.Dispose();
Gbm.DestroySurface(window.Handle);
}
else
{
Debug.Print("[KMS] {0} leaked. Did you forget to call Dispose()?", GetType().FullName);
}
}
private void WaitFlip(bool block)
{
PollFD fds = new PollFD();
fds.fd = fd;
fds.events = PollFlags.In;
EventContext evctx = new EventContext();
evctx.version = EventContext.Version;
evctx.page_flip_handler = PageFlipPtr;
int timeout = block ? -1 : 0;
while (is_flip_queued)
{
fds.revents = 0;
if (Libc.poll(ref fds, 1, timeout) < 0)
{
break;
}
if ((fds.revents & (PollFlags.Hup | PollFlags.Error)) != 0)
{
break;
}
if ((fds.revents & PollFlags.In) != 0)
{
Drm.HandleEvent(fd, ref evctx);
}
else
{
break;
}
}
// Page flip has taken place, update buffer objects
if (!is_flip_queued)
{
IntPtr gbm_surface = WindowInfo.Handle;
Gbm.ReleaseBuffer(gbm_surface, bo);
bo = bo_next;
}
}
private static int SetupDisplay(string gpu, out IntPtr gbm_device, out IntPtr egl_display)
{
Debug.Print("[KMS] Attempting to use gpu '{0}'.", gpu);
gbm_device = IntPtr.Zero;
egl_display = IntPtr.Zero;
var fd = Libc.open(gpu, OpenFlags.ReadWrite | OpenFlags.CloseOnExec);
if (fd < 0)
{
Debug.Print("[KMS] Failed to open gpu");
return(fd);
}
Debug.Print("[KMS] GPU '{0}' opened as fd:{1}", gpu, fd);
gbm_device = Gbm.CreateDevice(fd);
if (gbm_device == IntPtr.Zero)
{
throw new NotSupportedException("[KMS] Failed to create GBM device");
}
Debug.Print("[KMS] GBM {0:x} created successfully; ", gbm_device);
egl_display = Egl.Egl.GetDisplay(gbm_device);
if (egl_display == IntPtr.Zero)
{
throw new NotSupportedException("[KMS] Failed to create EGL display");
}
Debug.Print("[KMS] EGL display {0:x} created successfully", egl_display);
int major, minor;
if (!Egl.Egl.Initialize(egl_display, out major, out minor))
{
var error = Egl.Egl.GetError();
throw new NotSupportedException("[KMS] Failed to initialize EGL display. Error code: " + error);
}
Debug.Print("[KMS] EGL {0}.{1} initialized successfully on display {2:x}", major, minor, egl_display);
return(fd);
}
static BufferObject CreateCursor(IntPtr gbm, MouseCursor cursor)
{
if (cursor.Width > 64 || cursor.Height > 64)
{
Debug.Print("[KMS] Cursor size {0}x{1} unsupported. Maximum is 64x64.",
cursor.Width, cursor.Height);
return(default(BufferObject));
}
int width = 64;
int height = 64;
SurfaceFormat format = SurfaceFormat.ARGB8888;
SurfaceFlags usage = SurfaceFlags.Cursor64x64 | SurfaceFlags.Write;
Debug.Print("[KMS] Gbm.CreateBuffer({0:X}, {1}, {2}, {3}, {4}).",
gbm, width, height, format, usage);
BufferObject bo = Gbm.CreateBuffer(
gbm, width, height, format, usage);
if (bo == BufferObject.Zero)
{
Debug.Print("[KMS] Failed to create buffer.");
return(bo);
}
// Copy cursor.Data into a new buffer of the correct size
byte[] cursor_data = new byte[width * height * 4];
for (int y = 0; y < cursor.Height; y++)
{
int dst_offset = y * width * 4;
int src_offset = y * cursor.Width * 4;
int src_length = cursor.Width * 4;
Array.Copy(
cursor.Data, src_offset,
cursor_data, dst_offset,
src_length);
}
bo.Write(cursor_data);
return(bo);
}
protected override void Dispose(bool manual)
{
if (egl_display != IntPtr.Zero)
{
Debug.Print("[KMS] Terminating EGL.");
Egl.Terminate(egl_display);
egl_display = IntPtr.Zero;
}
if (gbm_device != IntPtr.Zero)
{
Debug.Print("[KMS] Destroying GBM device.");
Gbm.DestroyDevice(gbm_device);
gbm_device = IntPtr.Zero;
}
if (_fd >= 0)
{
Debug.Print("[KMS] Closing GPU fd.");
Libc.close(_fd);
}
base.Dispose(manual);
}
private BufferObject LockSurface()
{
IntPtr gbm_surface = WindowInfo.Handle;
return(Gbm.LockFrontBuffer(gbm_surface));
}
public LinuxNativeWindow(IntPtr display, IntPtr gbm, int fd,
int x, int y, int width, int height, string title,
GraphicsMode mode, GameWindowFlags options,
DisplayDevice display_device)
{
Debug.Print("[KMS] Creating window on display {0:x}", display);
Title = title;
display_device = display_device ?? DisplayDevice.Default;
if (display_device == null)
{
throw new NotSupportedException("[KMS] Driver does not currently support headless systems");
}
window = new LinuxWindowInfo(display, fd, gbm, display_device.Id as LinuxDisplay);
// Note: we only support fullscreen windows on KMS.
// We implicitly override the requested width and height
// by the width and height of the DisplayDevice, if any.
width = display_device.Width;
height = display_device.Height;
bounds = new Rectangle(0, 0, width, height);
client_size = bounds.Size;
if (!mode.Index.HasValue)
{
mode = new EglGraphicsMode().SelectGraphicsMode(window, mode, 0);
}
Debug.Print("[KMS] Selected EGL mode {0}", mode);
SurfaceFormat format = GetSurfaceFormat(display, mode);
SurfaceFlags usage = SurfaceFlags.Rendering | SurfaceFlags.Scanout;
if (!Gbm.IsFormatSupported(gbm, format, usage))
{
Debug.Print("[KMS] Failed to find suitable surface format, using XRGB8888");
format = SurfaceFormat.XRGB8888;
}
Debug.Print("[KMS] Creating GBM surface on {0:x} with {1}x{2} {3} [{4}]",
gbm, width, height, format, usage);
IntPtr gbm_surface = Gbm.CreateSurface(gbm,
width, height, format, usage);
if (gbm_surface == IntPtr.Zero)
{
throw new NotSupportedException("[KMS] Failed to create GBM surface for rendering");
}
window.Handle = gbm_surface;
Debug.Print("[KMS] Created GBM surface {0:x}", window.Handle);
window.CreateWindowSurface(mode.Index.Value);
Debug.Print("[KMS] Created EGL surface {0:x}", window.Surface);
cursor_default = CreateCursor(gbm, Cursors.Default);
cursor_empty = CreateCursor(gbm, Cursors.Empty);
Cursor = MouseCursor.Default;
exists = true;
}
public void Dispose()
{
Gbm.DestroyBuffer(this);
buffer = IntPtr.Zero;
}
public void SetUserData(IntPtr data, DestroyUserDataCallback destroyFB)
{
Gbm.BOSetUserData(buffer, data, destroyFB);
}