Mirrored slave monitors don't get enumerated by EnumDisplayMonitors. For example, if two monitors are in mirrored mode, only one of them is reported by EnumDisplayMonitors.
Signed-off-by: Zhiyi Zhang zzhang@codeweavers.com --- dlls/user32/sysparams.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/dlls/user32/sysparams.c b/dlls/user32/sysparams.c index 09cebc2f62..b407b51811 100644 --- a/dlls/user32/sysparams.c +++ b/dlls/user32/sysparams.c @@ -3750,7 +3750,8 @@ static BOOL update_monitor_cache(void) HANDLE mutex = NULL; DWORD state_flags; BOOL ret = FALSE; - DWORD i = 0; + BOOL mirrored_slave; + DWORD i = 0, j; DWORD type;
/* Update monitor cache from SetupAPI if it's outdated */ @@ -3794,6 +3795,20 @@ static BOOL update_monitor_cache(void) if (!SetupDiGetDevicePropertyW( devinfo, &device_data, &WINE_DEVPROPKEY_MONITOR_RCMONITOR, &type, (BYTE *)&monitors[monitor_count].rcMonitor, sizeof(RECT), NULL, 0 )) goto fail; + + /* Mirrored slave monitors also don't get enumerated */ + mirrored_slave = FALSE; + for (j = 0; j < monitor_count; j++) + { + if (EqualRect(&monitors[j].rcMonitor, &monitors[monitor_count].rcMonitor)) + { + mirrored_slave = TRUE; + break; + } + } + if (mirrored_slave) + continue; + if (!SetupDiGetDevicePropertyW( devinfo, &device_data, &WINE_DEVPROPKEY_MONITOR_RCWORK, &type, (BYTE *)&monitors[monitor_count].rcWork, sizeof(RECT), NULL, 0 )) goto fail;