mirror of
https://github.com/italicsjenga/winit-sonoma-fix.git
synced 2024-12-24 06:11:30 +11:00
On Windows, fix new DPI API not setting window size properly (#1130)
* First attempt * Second attempt * Maintain cursor horizontal ratio * Fix DPI change handling when maximized * Revert window example * Make new DPI code more understandable * Format
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@ -36,7 +36,7 @@ use winapi::{
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},
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um::{
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commctrl, libloaderapi, ole2, processthreadsapi, winbase,
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winnt::{HANDLE, LPCSTR, SHORT},
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winnt::{HANDLE, LONG, LPCSTR, SHORT},
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winuser,
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},
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};
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@ -1430,7 +1430,12 @@ unsafe extern "system" fn public_window_callback<T: 'static>(
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old_dpi_factor = window_state.dpi_factor;
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window_state.dpi_factor = new_dpi_factor;
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new_dpi_factor != old_dpi_factor && window_state.fullscreen.is_none()
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if new_dpi_factor == old_dpi_factor {
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return 0;
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}
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window_state.fullscreen.is_none()
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&& !window_state.window_flags().contains(WindowFlags::MAXIMIZED)
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};
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let style = winuser::GetWindowLongW(window, winuser::GWL_STYLE) as _;
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@ -1438,16 +1443,18 @@ unsafe extern "system" fn public_window_callback<T: 'static>(
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let b_menu = !winuser::GetMenu(window).is_null() as BOOL;
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// New size as suggested by Windows.
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let rect = *(lparam as *const RECT);
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let suggested_rect = *(lparam as *const RECT);
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// The window rect provided is the window's outer size, not it's inner size. However,
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// win32 doesn't provide an `UnadjustWindowRectEx` function to get the client rect from
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// the outer rect, so we instead adjust the window rect to get the decoration margins
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// and remove them from the outer size.
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let margins_horizontal: u32;
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let margins_vertical: u32;
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let margin_left: i32;
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let margin_top: i32;
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// let margin_right: i32;
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// let margin_bottom: i32;
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{
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let mut adjusted_rect = rect;
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let mut adjusted_rect = suggested_rect;
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winuser::AdjustWindowRectExForDpi(
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&mut adjusted_rect,
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style,
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@ -1455,60 +1462,171 @@ unsafe extern "system" fn public_window_callback<T: 'static>(
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style_ex,
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new_dpi_x,
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);
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let margin_left = rect.left - adjusted_rect.left;
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let margin_right = adjusted_rect.right - rect.right;
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let margin_top = rect.top - adjusted_rect.top;
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let margin_bottom = adjusted_rect.bottom - rect.bottom;
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margins_horizontal = (margin_left + margin_right) as u32;
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margins_vertical = (margin_bottom + margin_top) as u32;
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margin_left = suggested_rect.left - adjusted_rect.left;
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margin_top = suggested_rect.top - adjusted_rect.top;
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// margin_right = adjusted_rect.right - suggested_rect.right;
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// margin_bottom = adjusted_rect.bottom - suggested_rect.bottom;
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}
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// Use the rect suggested by Windows
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// let physical_inner_rect = PhysicalSize::new(
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// (rect.right - rect.left) as u32 - margins_horizontal,
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// (rect.bottom - rect.top) as u32 - margins_vertical,
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// );
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let old_physical_inner_rect = {
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let mut old_physical_inner_rect = mem::zeroed();
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winuser::GetClientRect(window, &mut old_physical_inner_rect);
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let mut origin = mem::zeroed();
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winuser::ClientToScreen(window, &mut origin);
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// We calculate our own rect because the default suggested rect doesn't do a great job
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// of preserving the window's logical size.
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let physical_inner_rect = {
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let mut current_rect = mem::zeroed();
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winuser::GetClientRect(window, &mut current_rect);
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old_physical_inner_rect.left += origin.x;
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old_physical_inner_rect.right += origin.x;
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old_physical_inner_rect.top += origin.y;
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old_physical_inner_rect.bottom += origin.y;
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let client_rect = PhysicalSize::new(
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(current_rect.right - current_rect.left) as u32,
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(current_rect.bottom - current_rect.top) as u32,
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);
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client_rect
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.to_logical(old_dpi_factor)
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.to_physical(new_dpi_factor)
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old_physical_inner_rect
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};
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let old_physical_inner_size = PhysicalSize::new(
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(old_physical_inner_rect.right - old_physical_inner_rect.left) as u32,
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(old_physical_inner_rect.bottom - old_physical_inner_rect.top) as u32,
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);
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// We calculate our own size because the default suggested rect doesn't do a great job
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// of preserving the window's logical size.
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let suggested_physical_inner_size = old_physical_inner_size
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.to_logical(old_dpi_factor)
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.to_physical(new_dpi_factor);
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// `allow_resize` prevents us from re-applying DPI adjustment to the restored size after
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// exiting fullscreen (the restored size is already DPI adjusted).
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let mut new_inner_rect_opt = Some(physical_inner_rect).filter(|_| allow_resize);
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let mut new_inner_size_opt =
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Some(suggested_physical_inner_size).filter(|_| allow_resize);
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let _ = subclass_input.send_event_unbuffered(Event::WindowEvent {
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window_id: RootWindowId(WindowId(window)),
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event: HiDpiFactorChanged {
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hidpi_factor: new_dpi_factor,
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new_inner_size: &mut new_inner_rect_opt,
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new_inner_size: &mut new_inner_size_opt,
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},
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});
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if let Some(new_inner_rect) = new_inner_rect_opt {
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winuser::SetWindowPos(
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window,
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ptr::null_mut(),
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rect.left,
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rect.top,
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(new_inner_rect.width + margins_horizontal) as _,
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(new_inner_rect.height + margins_vertical) as _,
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winuser::SWP_NOZORDER | winuser::SWP_NOACTIVATE,
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);
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let new_physical_inner_size = new_inner_size_opt.unwrap_or(old_physical_inner_size);
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// Unset maximized if we're changing the window's size.
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if new_physical_inner_size != old_physical_inner_size {
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WindowState::set_window_flags(subclass_input.window_state.lock(), window, |f| {
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f.set(WindowFlags::MAXIMIZED, false)
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});
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}
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let new_outer_rect: RECT;
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{
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let suggested_ul = (
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suggested_rect.left + margin_left,
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suggested_rect.top + margin_top,
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);
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let mut conservative_rect = RECT {
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left: suggested_ul.0,
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top: suggested_ul.1,
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right: suggested_ul.0 + new_physical_inner_size.width as LONG,
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bottom: suggested_ul.1 + new_physical_inner_size.height as LONG,
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};
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winuser::AdjustWindowRectExForDpi(
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&mut conservative_rect,
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style,
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b_menu,
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style_ex,
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new_dpi_x,
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);
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// If we're not dragging the window, offset the window so that the cursor's
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// relative horizontal position in the title bar is preserved.
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let dragging_window = subclass_input.event_loop_runner.in_modal_loop();
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if dragging_window {
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let bias = {
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let cursor_pos = {
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let mut pos = mem::zeroed();
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winuser::GetCursorPos(&mut pos);
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pos
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};
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let suggested_cursor_horizontal_ratio = (cursor_pos.x - suggested_rect.left)
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as f64
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/ (suggested_rect.right - suggested_rect.left) as f64;
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(cursor_pos.x
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- (suggested_cursor_horizontal_ratio
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* (conservative_rect.right - conservative_rect.left) as f64)
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as LONG)
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- conservative_rect.left
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};
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conservative_rect.left += bias;
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conservative_rect.right += bias;
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}
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// Check to see if the new window rect is on the monitor with the new DPI factor.
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// If it isn't, offset the window so that it is.
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let new_dpi_monitor = winuser::MonitorFromWindow(window, 0);
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let conservative_rect_monitor = winuser::MonitorFromRect(&conservative_rect, 0);
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new_outer_rect = if conservative_rect_monitor == new_dpi_monitor {
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conservative_rect
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} else {
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let get_monitor_rect = |monitor| {
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let mut monitor_info = winuser::MONITORINFO {
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cbSize: mem::size_of::<winuser::MONITORINFO>() as _,
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..mem::zeroed()
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};
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winuser::GetMonitorInfoW(monitor, &mut monitor_info);
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monitor_info.rcMonitor
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};
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let wrong_monitor = conservative_rect_monitor;
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let wrong_monitor_rect = get_monitor_rect(wrong_monitor);
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let new_monitor_rect = get_monitor_rect(new_dpi_monitor);
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// The direction to nudge the window in to get the window onto the monitor with
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// the new DPI factor. We calculate this by seeing which monitor edges are
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// shared and nudging away from the wrong monitor based on those.
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let delta_nudge_to_dpi_monitor = (
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if wrong_monitor_rect.left == new_monitor_rect.right {
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-1
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} else if wrong_monitor_rect.right == new_monitor_rect.left {
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1
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} else {
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0
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},
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if wrong_monitor_rect.bottom == new_monitor_rect.top {
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1
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} else if wrong_monitor_rect.top == new_monitor_rect.bottom {
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-1
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} else {
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0
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},
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);
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let abort_after_iterations = new_monitor_rect.right - new_monitor_rect.left
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+ new_monitor_rect.bottom
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- new_monitor_rect.top;
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for _ in 0..abort_after_iterations {
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conservative_rect.left += delta_nudge_to_dpi_monitor.0;
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conservative_rect.right += delta_nudge_to_dpi_monitor.0;
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conservative_rect.top += delta_nudge_to_dpi_monitor.1;
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conservative_rect.bottom += delta_nudge_to_dpi_monitor.1;
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if winuser::MonitorFromRect(&conservative_rect, 0) == new_dpi_monitor {
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break;
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}
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}
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conservative_rect
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};
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}
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winuser::SetWindowPos(
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window,
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ptr::null_mut(),
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new_outer_rect.left,
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new_outer_rect.top,
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new_outer_rect.right - new_outer_rect.left,
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new_outer_rect.bottom - new_outer_rect.top,
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winuser::SWP_NOZORDER | winuser::SWP_NOACTIVATE,
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);
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0
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}
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