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user32: Optimize getting monitor count with GetSystemMetrics(). 

This saves calls to GetMonitorInfo().

Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zhiyi Zhang 2021-05-18 17:11:02 +08:00 committed by Alexandre Julliard
parent 573d451b80
commit d7cd5587df
1 changed files with 17 additions and 2 deletions
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19
dlls/user32/sysparams.c
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@ -371,6 +371,22 @@ RECT get_virtual_screen_rect(void)
return info.virtual_rect;
}
static BOOL CALLBACK get_monitor_count_proc( HMONITOR monitor, HDC hdc, LPRECT rect, LPARAM lp )
{
INT *count = (INT *)lp;
++(*count);
return TRUE;
}
static INT get_monitor_count(void)
{
INT count = 0;
EnumDisplayMonitors( 0, NULL, get_monitor_count_proc, (LPARAM)&count );
return count;
}
static BOOL get_primary_adapter(WCHAR *name)
{
DISPLAY_DEVICEW dd;
@ -2717,8 +2733,7 @@ INT WINAPI GetSystemMetrics( INT index )
get_monitors_info( &info );
return info.virtual_rect.bottom - info.virtual_rect.top;
case SM_CMONITORS:
get_monitors_info( &info );
return info.count;
return get_monitor_count();
case SM_SAMEDISPLAYFORMAT:
return 1;
case SM_IMMENABLED: