public void PageFlip()
{
if (_bo != IntPtr.Zero)
{
Gbm.SurfaceReleaseBuffer(_gbmSurface, _bo);
}
SetCrtc();
}
public override void EnterMessageLoop(bool runInBackground)
{
bool running = true;
SizeChanged?.Invoke(this, _width, _height);
Activated?.Invoke(this);
IntPtr bo = Gbm.SurfaceLockFrontBuffer(_gbmSurface);
uint fb = GetFbForBo(bo);
IntPtr connectors = System.Runtime.InteropServices.Marshal.AllocHGlobal(sizeof(uint));
System.Runtime.InteropServices.Marshal.WriteInt32(connectors, (int)_drmConnectorId);
int rc = Drm.ModeSetCrtc(_drmFd, _drmEncoderCrtcId, fb, 0, 0, connectors, 1, ref _drmMode);
System.Runtime.InteropServices.Marshal.FreeHGlobal(connectors);
if (rc != 0)
{
throw new Exception("Failed to create DRM Mode");
}
while (running)
{
LibEvdev.HandleEvents();
Render?.Invoke(this);
IntPtr prevBo = bo;
bo = Gbm.SurfaceLockFrontBuffer(_gbmSurface);
fb = GetFbForBo(bo);
Drm.ModePageFlip(_drmFd, _drmEncoderCrtcId, fb, Drm.MODE_PAGE_FLIP_EVENT, IntPtr.Zero);
LibC.PollFd fd = new LibC.PollFd();
fd.fd = _drmFd;
fd.events = LibC.POLLIN | LibC.POLLPRI;
LibC.PollFd[] fds = new LibC.PollFd[] { fd };
LibC.Poll(fds, -1);
Drm.EventContext evctx = new Drm.EventContext();
evctx.version = 2;
Drm.HandleEvent(_drmFd, ref evctx);
if (prevBo != IntPtr.Zero)
{
Gbm.SurfaceReleaseBuffer(_gbmSurface, prevBo);
}
}
}