private void SetScanoutRegion(int buffer)
{
LinuxWindowInfo wnd = WindowInfo as LinuxWindowInfo;
if (wnd == null)
{
throw new InvalidOperationException();
}
unsafe
{
ModeInfo *mode = wnd.DisplayDevice.pConnector->modes;
int connector_id = wnd.DisplayDevice.pConnector->connector_id;
int crtc_id = wnd.DisplayDevice.Id;
int x = 0;
int y = 0;
int connector_count = 1;
int ret = Drm.ModeSetCrtc(fd, crtc_id, buffer, x, y,
&connector_id, connector_count, mode);
if (ret != 0)
{
Debug.Print("[KMS] Drm.ModeSetCrtc{0}, {1}, {2}, {3}, {4:x}, {5}, {6:x}) failed. Error: {7}",
fd, crtc_id, buffer, x, y, (IntPtr)connector_id, connector_count, (IntPtr)mode, ret);
}
}
}
private unsafe static void GetModes(LinuxDisplay display, DisplayResolution[] modes, out DisplayResolution current)
{
int mode_count = display.pConnector->count_modes;
Debug.Print("[KMS] Display supports {0} mode(s)", mode_count);
for (int i = 0; i < mode_count; i++)
{
ModeInfo *mode = display.pConnector->modes + i;
if (mode != null)
{
Debug.Print("Mode {0}: {1}x{2} @{3}", i,
mode->hdisplay, mode->vdisplay, mode->vrefresh);
DisplayResolution res = GetDisplayResolution(mode);
modes[i] = res;
}
}
if (display.pCrtc->mode_valid != 0)
{
ModeInfo cmode = display.pCrtc->mode;
current = GetDisplayResolution(&cmode);
}
else
{
current = GetDisplayResolution(display.pConnector->modes);
}
Debug.Print("Current mode: {0}", current.ToString());
}
private unsafe static DisplayResolution GetDisplayResolution(ModeInfo *mode)
{
return(new DisplayResolution(
0, 0,
mode->hdisplay, mode->vdisplay,
32, // This is actually part of the framebuffer, not the DisplayResolution
mode->vrefresh));
}
private unsafe static ModeInfo *GetModeInfo(LinuxDisplay display, DisplayResolution resolution)
{
for (int i = 0; i < display.pConnector->count_modes; i++)
{
ModeInfo *mode = display.pConnector->modes + i;
if (mode != null &&
mode->hdisplay == resolution.Width &&
mode->vdisplay == resolution.Height)
{
return(mode);
}
}
return(null);
}
public override bool TryChangeResolution(DisplayDevice device, DisplayResolution resolution)
{
unsafe
{
LinuxDisplay display = (LinuxDisplay)device.Id;
ModeInfo * mode = GetModeInfo(display, resolution);
int connector_id = display.pConnector->connector_id;
if (mode != null)
{
return(Drm.ModeSetCrtc(FD, display.Id, 0, 0, 0,
&connector_id, 1, mode) == 0);
}
return(false);
}
}
unsafe public static extern int ModeSetCrtc(int fd, int crtcId, int bufferId,
int x, int y, int *connectors, int count, ModeInfo *mode);