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user32: Get the system DPI from the registry instead of from GDI. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2018-04-12 13:24:36 +02:00
parent edb7f51209
commit 74a9c91964
1 changed files with 26 additions and 6 deletions
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32
dlls/user32/sysparams.c
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@ -612,6 +612,31 @@ static BOOL init_entry_string( struct sysparam_entry *entry, const WCHAR *str )
return init_entry( entry, str, (strlenW(str) + 1) * sizeof(WCHAR), REG_SZ );
}
static DWORD get_reg_dword( HKEY base, const WCHAR *key_name, const WCHAR *value_name )
{
HKEY key;
DWORD type, ret = 0, size = sizeof(ret);
if (RegOpenKeyW( base, key_name, &key )) return 0;
if (RegQueryValueExW( key, value_name, NULL, &type, (void *)&ret, &size ) || type != REG_DWORD)
ret = 0;
RegCloseKey( key );
return ret;
}
/* get the system dpi from the registry */
static UINT get_system_dpi(void)
{
static const WCHAR dpi_key_name[] = {'C','o','n','t','r','o','l',' ','P','a','n','e','l','\\','D','e','s','k','t','o','p','\0'};
static const WCHAR def_dpi_key_name[] = {'S','o','f','t','w','a','r','e','\\','F','o','n','t','s','\0'};
static const WCHAR dpi_value_name[] = {'L','o','g','P','i','x','e','l','s','\0'};
DWORD dpi;
if ((dpi = get_reg_dword( HKEY_CURRENT_USER, dpi_key_name, dpi_value_name ))) return dpi;
if ((dpi = get_reg_dword( HKEY_CURRENT_CONFIG, def_dpi_key_name, dpi_value_name ))) return dpi;
return USER_DEFAULT_SCREEN_DPI;
}
HDC get_display_dc(void)
{
static const WCHAR DISPLAY[] = {'D','I','S','P','L','A','Y',0};
@ -3065,12 +3090,7 @@ UINT WINAPI GetDpiForSystem(void)
if (!IsProcessDPIAware()) return USER_DEFAULT_SCREEN_DPI;
if (!display_dpi)
{
HDC hdc = get_display_dc();
display_dpi = GetDeviceCaps( hdc, LOGPIXELSY );
release_display_dc( hdc );
}
if (!display_dpi) display_dpi = get_system_dpi();
return display_dpi;
}