// IM-2014-01-28: [[ HiDPI ]] Return the DPI scale factor of the main screen.
// This gives us the pixelscale for system-DPI-aware applications.
MCGFloat MCWin32GetLogicalToScreenScale(void)
{
// TODO - determine the correct value on Win8.1 - this may depend on the display in question
uint32_t t_x, t_y;
/* UNCHECKED */ MCWin32GetScreenDPI(t_x, t_y);
return (MCGFloat) MCMax(t_x, t_y) / NORMAL_DENSITY;
}
// IM-2014-01-28: [[ HiDPI ]] Return the DPI scale factor of the given monitor.
// For system-DPI-aware applications this will be the global system DPI value.
// For Per-Monitor-DPI-aware applications, this will be the effective DPI scale of the given monitor
bool MCWin32GetMonitorPixelScale(HMONITOR p_monitor, MCGFloat &r_pixel_scale)
{
uint32_t t_xdpi, t_ydpi;
// try to get per-monitor DPI setting
if (!MCWin32GetDPIForMonitor(p_monitor, t_xdpi, t_ydpi) &&
// fallback to the global system DPI setting
!MCWin32GetScreenDPI(t_xdpi, t_ydpi))
return false;
r_pixel_scale = (MCGFloat)MCMax(t_xdpi, t_ydpi) / NORMAL_DENSITY;
return true;
}
// IM-2014-01-28: [[ HiDPI ]] Return the DPI scale factor of the main screen.
// This gives us the pixelscale for system-DPI-aware applications.
MCGFloat MCWin32GetLogicalToScreenScale(void)
{
// TODO - determine the correct value on Win8.1 - this may depend on the display in question
// IM-2014-08-08: [[ Bug 12372 ]] If pixel scaling is disabled, then
// we don't need to scale from logical -> screen.
if (!MCResGetUsePixelScaling())
return 1.0;
uint32_t t_x, t_y;
/* UNCHECKED */ MCWin32GetScreenDPI(t_x, t_y);
return (MCGFloat) MCMax(t_x, t_y) / NORMAL_DENSITY;
}
// IM-2014-01-28: [[ HiDPI ]] Return the DPI scale factor of the given monitor.
// For system-DPI-aware applications this will be the global system DPI value.
// For Per-Monitor-DPI-aware applications, this will be the effective DPI scale of the given monitor
bool MCWin32GetMonitorPixelScale(HMONITOR p_monitor, MCGFloat &r_pixel_scale)
{
UINT t_xdpi, t_ydpi;
HRESULT t_result;
// try to get per-monitor DPI setting
if (!MCWin32GetDPIForMonitor(t_result, p_monitor, kMCWin32MDTDefault, &t_xdpi, &t_ydpi) ||
t_result != S_OK)
{
// fallback to the global system DPI setting
uint32_t t_screen_xdpi, t_screen_ydpi;
if (!MCWin32GetScreenDPI(t_screen_xdpi, t_screen_ydpi))
return false;
t_xdpi = t_screen_xdpi;
t_ydpi = t_screen_ydpi;
}
r_pixel_scale = (MCGFloat)MCMax(t_xdpi, t_ydpi) / NORMAL_DENSITY;
return true;
}
