Setting Cursor Position Inaccurate

[tomaka]

Original: rust-windowing/glutin#663

[paulirotta]

This may be the same issue I'm seeing with Windows 10 DPI awareness settings. I think the solution is something along the lines of SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE) to get Windows to give 1:1 on virtual pixels and real pixels. Some APIs use scaled pixels, some not...
https://msdn.microsoft.com/en-us/library/windows/desktop/dn469266(v=vs.85).aspx
https://msdn.microsoft.com/en-us/library/windows/desktop/dn302122(v=vs.85).aspx

(Related?) app-level hack, Vulkano on Windows with 250% scaling (high DPI laptop):
// Hack to make Vulkano window the same size as the screen when scaling is 250%
let monitor_id: winit::MonitorId = {
//TODO Find the most appropriate monitor, for example the one selected last time
for (num, monitor) in winit::get_available_monitors().enumerate() {
println!("Monitor #{}: {:?} {:?}", num, monitor.get_name(), monitor.get_dimensions());
}
let num = 0;
let monitor = winit::get_available_monitors().nth(num).expect("Invalid monitor ID");
monitor
};
let monitor_dimensions = monitor_id.get_dimensions();
let k = (10, 25); // 2.5 safe integer division
*** let window_dimensions = (monitor_dimensions.0 k.0/k.1, monitor_dimensions.1k.0/k.1); ***
let window = winit::WindowBuilder::new()
.with_title("Slice")
.with_multitouch()
.with_dimensions(window_dimensions.0, window_dimensions.1)
.with_decorations(true)
.build_vk_surface(&instance)
.expect("Could not build Vulkan window");

[LPGhatguy]

I'm going to give this issue a try, as I hit the hidpi inaccuracy the other day.

To be backwards compatible with Windows Vista and 7, you can pass TRUE to SetProcessDpiAwareness to be per-monitor DPI aware on 8.1+ and system API aware on 8-. EDIT: Shcore.dll isn't present on Windows 8 and older, need to dynamically link against it