I tried to test multi-monitor support by firing another, nested X server
Xephyr :1 -screen 1024x768
then Cin displays her windows on either DISPLAY :0 or :1 depend on
preferences but I can\t set compositor to just one ...xserver.
I looked into code :)
in cwindowgui.C
CWindowGUI::CWindowGUI(MWindow *mwindow, CWindow *cwindow)
: BC_Window(_(PROGRAM_NAME ": Compositor"),
mwindow->session->cwindow_x,
mwindow->session->cwindow_y,
mwindow->session->cwindow_w,
mwindow->session->cwindow_h,
xS(100), yS(100), 1, 1, 1,
BC_WindowBase::get_resources()->bg_color,
mwindow->get_cwindow_display())
in mwindow.C
char *MWindow::get_cwindow_display()
{
char *x11_host = screens < 2 || session->window_config == 0 ?
session->a_x11_host : session->b_x11_host;
return *x11_host ? x11_host : 0;
}
and screens set in
void MWindow::init_preferences()
{
preferences = new Preferences;
preferences->load_defaults(defaults);
File::setenv_path("LV2_PATH",preferences->lv2_path, 1);
session = new MainSession(this);
session->load_defaults(defaults);
// set x11_host, screens, window_config
screens = session->set_default_x11_host();
so into mainsession.C
// set default x11 host, window_config, return screens
int MainSession::set_default_x11_host(int win_config)
{
if( win_config < 0 ) win_config = window_config;
const char *x11_host = win_config!=1 ? a_x11_host : b_x11_host;
BC_DisplayInfo display_info(x11_host,0);
int screen = display_info.get_screen();
if( screen < 0 && strcmp(a_x11_host, b_x11_host) ) {
win_config = win_config==1 ? 0 : 1;
x11_host = win_config!=1 ? a_x11_host : b_x11_host;
display_info.init_window(x11_host,0);
screen = display_info.get_screen();
}
if( screen < 0 ) {
x11_host = "";
display_info.init_window(x11_host,1);
}
int screens = 1;
if( display_info.get_screen_count() > 1 )
screens = strcmp(a_x11_host, b_x11_host) != 0 ? 2 : 1;
window_config = win_config;
BC_Window::set_default_x11_host(x11_host);
return screens;
}
and display_info lives in
guicast/bcdisplayinfo.C and h
in our case in h file
int get_screen() { return scrnum; }
and scrnum set to
scrnum = DefaultScreen(display);
in void BC_DisplayInfo::init_window(const char *display_name, int show_error)
so, it seems having two 'x11 hosts" as separate X servers to send
Compositor to actually not supported... ? we query number of screens
on specific display/host ...
so :0.0 and :0.1 works, while :1.0 and :0.0 not ?
also, 3 or more displays will not work?
