Add borderless windows for Windows and Linux X11

src/conf.rs

@@ -162,6 +162,10 @@ pub struct Conf {
     ///
     /// Default: false
     pub fullscreen: bool,
+    /// Whether the window should be created without borders, ignored on wasm/android.
+    ///
+    /// Default: false
+    pub borderless: bool,
     /// MSAA sample count
     ///
     /// Default: 1
@@ -221,6 +225,7 @@ impl Default for Conf {
             window_height: 600,
             high_dpi: false,
             fullscreen: false,
+            borderless: false,
             sample_count: 1,
             window_resizable: true,
             icon: Some(Icon::miniquad_logo()),
@@ -238,6 +243,7 @@ impl Default for Conf {
             window_height: 600,
             high_dpi: true,
             fullscreen: true,
+            borderless: false,
             sample_count: 1,
             window_resizable: false,
             icon: Some(Icon::miniquad_logo()),

src/lib.rs

@@ -266,6 +266,13 @@ pub mod window {
             .unwrap();
     }
 
+    pub fn set_borderless(borderless: bool) {
+        let d = native_display().lock().unwrap();
+        d.native_requests
+            .send(native::Request::SetBorderless(borderless))
+            .unwrap();
+    }
+
     /// Get current OS clipboard value
     pub fn clipboard_get() -> Option<String> {
         let mut d = native_display().lock().unwrap();

src/native.rs

@@ -70,6 +70,7 @@ pub(crate) enum Request {
     SetWindowSize { new_width: u32, new_height: u32 },
     SetWindowPosition { new_x: u32, new_y: u32 },
     SetFullscreen(bool),
+    SetBorderless(bool),
     ShowKeyboard(bool),
 }
 

src/native/linux_x11.rs

@@ -16,7 +16,7 @@ use crate::{
 
 use libx11::*;
 
-use std::collections::HashMap;
+use std::{collections::HashMap, mem};
 
 #[derive(Debug, PartialEq, Eq, Clone)]
 pub enum X11Error {
@@ -261,6 +261,31 @@ impl X11Display {
         }
     }
 
+    unsafe fn set_borderless(&mut self, window: Window, borderless: bool) {
+        let hints_atom = (self.libx11.XInternAtom)(
+            self.display,
+            b"_MOTIF_WM_HINTS\x00" as *const u8 as *const _,
+            false as _,
+        );
+
+        let mut hints: MWMHints = mem::zeroed();
+
+        hints.flags = 2; // MWM_HINTS_DECORATIONS
+        hints.decorations = if borderless { 0 } else { 1 };
+
+        (self.libx11.XChangeProperty)(
+            self.display,
+            window,
+            hints_atom as _,
+            hints_atom as _,
+            32,
+            PropModeReplace,
+            &mut hints as *mut _ as *mut _,
+            5,
+        );
+        (self.libx11.XFlush)(self.display);
+    }
+
     unsafe fn set_window_size(&mut self, window: Window, new_width: i32, new_height: i32) {
         (self.libx11.XResizeWindow)(self.display, window, new_width, new_height);
         (self.libx11.XFlush)(self.display);
@@ -359,6 +384,7 @@ impl X11Display {
                     self.set_window_position(self.window, new_x as _, new_y as _)
                 }
                 SetFullscreen(fullscreen) => self.set_fullscreen(self.window, fullscreen),
+                SetBorderless(borderless) => self.set_borderless(self.window, borderless),
                 ShowKeyboard(..) => {
                     eprintln!("Not implemented for X11")
                 }
@@ -419,6 +445,9 @@ where
     if conf.fullscreen {
         display.set_fullscreen(display.window, true);
     }
+    if conf.borderless {
+        display.set_borderless(display.window, true);
+    }
 
     let mut event_handler = (f.take().unwrap())();
 

src/native/linux_x11/libx11.rs

@@ -722,6 +722,15 @@ pub mod Xutil_h {
     }
     #[derive(Copy, Clone)]
     #[repr(C)]
+    pub struct MWMHints {
+        pub flags: libc::c_ulong,
+        pub functions: libc::c_ulong,
+        pub decorations: libc::c_ulong,
+        pub input_mode: libc::c_long,
+        pub status: libc::c_ulong,
+    }
+    #[derive(Copy, Clone)]
+    #[repr(C)]
     pub struct XWMHints {
         pub flags: libc::c_long,
         pub input: libc::c_int,

src/native/windows.rs

@@ -30,6 +30,7 @@
 
 pub(crate) struct WindowsDisplay {
     fullscreen: bool,
+    borderless: bool,
     dpi_aware: bool,
     window_resizable: bool,
     cursor_grabbed: bool,
@@ -104,7 +105,7 @@
         rect.right = (rect.left + new_width as i32) as _;
         rect.top = (rect.bottom - new_height as i32) as _;
 
-        let win_style = get_win_style(self.fullscreen, self.window_resizable);
+        let win_style = get_win_style(self.fullscreen, self.borderless, self.window_resizable);
         let win_style_ex: DWORD = unsafe { GetWindowLongA(self.wnd, GWL_EXSTYLE) as _ };
         if unsafe {
             AdjustWindowRectEx(
@@ -155,12 +156,13 @@
     fn set_fullscreen(&mut self, fullscreen: bool) {
         self.fullscreen = fullscreen as _;
 
-        let win_style: DWORD = get_win_style(self.fullscreen, self.window_resizable);
+        let win_style: DWORD =
+            get_win_style(self.fullscreen, self.borderless, self.window_resizable);
 
         unsafe {
             #[cfg(target_arch = "x86_64")]
             SetWindowLongPtrA(self.wnd, GWL_STYLE, win_style as _);
             #[cfg(target_arch = "i686")]
             SetWindowLong(self.wnd, GWL_STYLE, win_style as _);
 
             if self.fullscreen {
@@ -194,14 +196,35 @@
             ShowWindow(self.wnd, SW_SHOW);
         };
     }
+
+    fn set_borderless(&mut self, borderless: bool) {
+        self.borderless = borderless as _;
+
+        let win_style: DWORD =
+            get_win_style(self.fullscreen, self.borderless, self.window_resizable);
+
+        unsafe {
+            #[cfg(target_arch = "x86_64")]
+            SetWindowLongPtrA(self.wnd, GWL_STYLE, win_style as _);
+            #[cfg(target_arch = "i686")]
+            SetWindowLong(self.wnd, GWL_STYLE, win_style as _);
+
+            ShowWindow(self.wnd, SW_SHOW);
+        };
+    }
 }
 
-fn get_win_style(is_fullscreen: bool, is_resizable: bool) -> DWORD {
+fn get_win_style(is_fullscreen: bool, is_borderless: bool, is_resizable: bool) -> DWORD {
     if is_fullscreen {
         WS_POPUP | WS_SYSMENU | WS_VISIBLE
     } else {
-        let mut win_style: DWORD =
-            WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX;
+        let mut win_style: DWORD = WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_SYSMENU | WS_MINIMIZEBOX;
+
+        if !is_borderless {
+            win_style |= WS_CAPTION;
+        } else {
+            win_style |= WS_POPUP;
+        }
 
         if is_resizable {
             win_style |= WS_MAXIMIZEBOX | WS_SIZEBOX;
@@ -606,6 +629,7 @@
 unsafe fn create_window(
     window_title: &str,
     fullscreen: bool,
+    borderless: bool,
     resizable: bool,
     width: i32,
     height: i32,
@@ -623,7 +647,7 @@
     wndclassw.cbWndExtra = std::mem::size_of::<*mut std::ffi::c_void>() as i32;
     RegisterClassW(&wndclassw);
 
-    let win_style: DWORD;
+    let win_style: DWORD = get_win_style(fullscreen, borderless, resizable);
     let win_ex_style: DWORD = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
     let mut rect = RECT {
         left: 0,
@@ -633,22 +657,9 @@
     };
 
     if fullscreen {
-        win_style = WS_POPUP | WS_SYSMENU | WS_VISIBLE;
         rect.right = GetSystemMetrics(SM_CXSCREEN);
         rect.bottom = GetSystemMetrics(SM_CYSCREEN);
     } else {
-        win_style = if resizable {
-            WS_CLIPSIBLINGS
-                | WS_CLIPCHILDREN
-                | WS_CAPTION
-                | WS_SYSMENU
-                | WS_MINIMIZEBOX
-                | WS_MAXIMIZEBOX
-                | WS_SIZEBOX
-        } else {
-            WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX
-        };
-
         rect.right = width;
         rect.bottom = height;
     }
@@ -824,7 +835,7 @@
 
     fn process_request(&mut self, request: Request) {
         use Request::*;
         unsafe {
             match request {
                 ScheduleUpdate => {
                     self.update_requested = true;
@@ -838,7 +849,8 @@
                 } => self.set_window_size(new_width as _, new_height as _),
                 SetWindowPosition { new_x, new_y } => self.set_window_position(new_x, new_y),
                 SetFullscreen(fullscreen) => self.set_fullscreen(fullscreen),
+                SetBorderless(borderless) => self.set_borderless(borderless),
                 ShowKeyboard(show) => {
                     eprintln!("Not implemented for windows")
                 }
             }
@@ -857,6 +869,7 @@
         let (wnd, dc) = create_window(
             &conf.window_title,
             conf.fullscreen,
+            conf.borderless,
             conf.window_resizable,
             conf.window_width as _,
             conf.window_height as _,
@@ -870,6 +883,7 @@
         let (msg_wnd, msg_dc) = create_msg_window();
         let mut display = WindowsDisplay {
             fullscreen: false,
+            borderless: false,
             dpi_aware: false,
             window_resizable: conf.window_resizable,
             cursor_grabbed: false,
@@ -917,7 +931,7 @@
 
         #[cfg(target_arch = "x86_64")]
         SetWindowLongPtrA(wnd, GWLP_USERDATA, &mut display as *mut _ as isize);
         #[cfg(target_arch = "i686")]
         SetWindowLong(wnd, GWLP_USERDATA, &mut display as *mut _ as isize);
 
         let mut done = false;