[Cin] Interesting confusion on X screens vs displays

[Andrew Randrianasulu]

вс, 8 янв. 2023 г., 09:15 Андрей Спицын via Cin <cin at lists.cinelerra-gg.org
>:

> >also, 3 or more displays will not work?
>
> I used Cinelerra with 5 displays and it's works ok. I didn't try Cinelerra
> with second xserver.
>


4 displays for each cin window and one separately for  scope? :-)



> Best regards,
> Andrey
>
> вс, 8 янв. 2023 г., 07:41 Andrew Randrianasulu via Cin <
> cin at lists.cinelerra-gg.org>:
>
>> 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?
>> --
>> Cin mailing list
>> Cin at lists.cinelerra-gg.org
>> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>>
> --
> Cin mailing list
> Cin at lists.cinelerra-gg.org
> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>
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