Windows: Refactor: move register window class into its own function
This commit is contained in:
Mirko Covizzi
parent
c54a2b3fb3
commit
f35f97c73e
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@ -4,8 +4,8 @@ use std::ffi::CString;
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use std::ptr::null_mut;
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use self::winapi::shared::guiddef::GUID;
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use self::winapi::shared::minwindef::{LPARAM, LRESULT, UINT, WPARAM};
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use self::winapi::shared::windef::{HDC, HGLRC, HWND};
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use self::winapi::shared::minwindef::{ATOM, FALSE, LPARAM, LRESULT, UINT, WPARAM};
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use self::winapi::shared::windef::{HDC, HGLRC, HWND, RECT};
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use self::winapi::um::combaseapi::CoCreateGuid;
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use self::winapi::um::libloaderapi::{GetProcAddress, LoadLibraryA};
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use self::winapi::um::wingdi::{
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@ -14,11 +14,11 @@ use self::winapi::um::wingdi::{
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PFD_TYPE_RGBA, PIXELFORMATDESCRIPTOR,
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};
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use self::winapi::um::winuser::{
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CreateWindowExA, DefWindowProcA, DestroyWindow, DispatchMessageA, GetDC, MessageBoxA,
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PeekMessageA, PostQuitMessage, RegisterClassA, ReleaseDC, TranslateMessage, UnregisterClassA,
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CS_HREDRAW, CS_OWNDC, CS_VREDRAW, MB_ICONERROR, MB_OK, MB_TOPMOST, MSG, PM_REMOVE, WM_CLOSE,
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WM_QUIT, WNDCLASSA, WS_CAPTION, WS_CHILD, WS_CLIPSIBLINGS, WS_MAXIMIZEBOX, WS_MINIMIZEBOX,
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WS_POPUPWINDOW, WS_SIZEBOX, WS_VISIBLE,
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AdjustWindowRectEx, CreateWindowExA, DefWindowProcA, DestroyWindow, DispatchMessageA, GetDC,
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MessageBoxA, PeekMessageA, PostQuitMessage, RegisterClassA, ReleaseDC, TranslateMessage,
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UnregisterClassA, CS_OWNDC, MB_ICONERROR, MB_OK, MB_TOPMOST, MSG,
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PM_REMOVE, WM_CLOSE, WM_QUIT, WNDCLASSA, WS_CAPTION, WS_CHILD, WS_CLIPSIBLINGS, WS_MAXIMIZEBOX,
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WS_MINIMIZEBOX, WS_POPUPWINDOW, WS_SIZEBOX, WS_VISIBLE,
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};
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use crate::Parent::WithParent;
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@ -49,151 +49,6 @@ unsafe fn generate_guid() -> String {
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)
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}
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pub struct Window {
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hwnd: HWND,
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hdc: HDC,
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gl_context: HGLRC,
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class_name: *const i8,
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}
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impl Window {
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// todo: we should decide this interface
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pub fn open(options: WindowOpenOptions) -> Self {
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unsafe {
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let mut hwnd = null_mut();
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let mut hdc = null_mut();
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let mut gl_context = null_mut();
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// We generate a unique name for the new window class to prevent name collisions
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let class_name = format!("Baseview-{}", generate_guid()).as_ptr() as *const i8;
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let window = Window {
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hwnd,
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hdc,
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gl_context,
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class_name,
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};
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let wnd_class = WNDCLASSA {
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style: CS_OWNDC | CS_HREDRAW | CS_VREDRAW,
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lpfnWndProc: Some(wnd_proc),
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hInstance: null_mut(),
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lpszClassName: class_name,
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cbClsExtra: 0,
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cbWndExtra: 0,
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hIcon: null_mut(),
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hCursor: null_mut(),
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hbrBackground: null_mut(),
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lpszMenuName: std::ptr::null::<i8>(),
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};
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RegisterClassA(&wnd_class);
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let mut flags = WS_POPUPWINDOW
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| WS_CAPTION
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| WS_VISIBLE
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| WS_SIZEBOX
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| WS_MINIMIZEBOX
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| WS_MAXIMIZEBOX
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| WS_CLIPSIBLINGS;
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let mut parent = null_mut();
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if let WithParent(p) = options.parent {
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parent = p;
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flags = WS_CHILD | WS_VISIBLE;
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}
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hwnd = CreateWindowExA(
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0,
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class_name,
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(options.title.to_owned() + "\0").as_ptr() as *const i8,
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flags,
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0,
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0,
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// todo: check if usize fits into i32
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options.width as i32,
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options.height as i32,
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parent as *mut _,
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null_mut(),
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null_mut(),
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null_mut(),
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);
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hdc = GetDC(hwnd);
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let mut pfd: PIXELFORMATDESCRIPTOR = std::mem::zeroed();
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pfd.nSize = std::mem::size_of::<PIXELFORMATDESCRIPTOR>() as u16;
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pfd.nVersion = 1;
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pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.cColorBits = 32;
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// todo: ask wrl why 24 instead of 32?
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pfd.cDepthBits = 24;
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pfd.cStencilBits = 8;
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pfd.iLayerType = PFD_MAIN_PLANE;
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let pf_id: i32 = ChoosePixelFormat(hdc, &pfd);
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if pf_id == 0 {
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// todo: use a more useful return like an Option
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// todo: also launch error message boxes
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return window;
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}
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if SetPixelFormat(hdc, pf_id, &pfd) == 0 {
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// todo: use a more useful return like an Option
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// todo: also launch error message boxes
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return window;
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}
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gl_context = wglCreateContext(hdc);
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if gl_context == 0 as HGLRC {
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// todo: use a more useful return like an Option
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// todo: also launch error message boxes
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return window;
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}
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if wglMakeCurrent(hdc, gl_context) == 0 {
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// todo: use a more useful return like an Option
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// todo: also launch error message boxes
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return window;
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}
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let h = LoadLibraryA("opengl32.dll\0".as_ptr() as *const i8);
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gl::load_with(|symbol| {
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let symbol = CString::new(symbol.as_bytes()).unwrap();
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let symbol = symbol.as_ptr();
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GetProcAddress(h, symbol) as *const _
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});
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// todo: decide what to do with the message pump
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if parent.is_null() {
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loop {
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if !handle_msg(null_mut()) {
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break;
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}
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// todo: pass callback rendering function instead
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gl::ClearColor(0.3, 0.8, 0.3, 1.0);
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gl::Clear(gl::COLOR_BUFFER_BIT);
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SwapBuffers(hdc);
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}
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}
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window
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}
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}
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pub fn close(&self) {
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// todo: see https://github.com/wrl/rutabaga/blob/f30ff67e157375cafdbafe5fb549f1790443a3a8/src/platform/win/window.c#L402
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unsafe {
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wglMakeCurrent(null_mut(), null_mut());
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wglDeleteContext(self.gl_context);
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ReleaseDC(self.hwnd, self.hdc);
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DestroyWindow(self.hwnd);
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UnregisterClassA(self.class_name, null_mut());
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}
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}
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}
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fn handle_msg(_window: HWND) -> bool {
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unsafe {
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let mut msg: MSG = std::mem::zeroed();
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@ -224,3 +79,170 @@ unsafe extern "system" fn wnd_proc(
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}
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0
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}
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unsafe fn register_wnd_class() -> ATOM {
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// We generate a unique name for the new window class to prevent name collisions
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let class_name = format!("Baseview-{}", generate_guid()).as_ptr() as *const i8;
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let wnd_class = WNDCLASSA {
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style: CS_OWNDC,
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lpfnWndProc: Some(wnd_proc),
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hInstance: null_mut(),
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lpszClassName: class_name,
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cbClsExtra: 0,
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cbWndExtra: 0,
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hIcon: null_mut(),
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hCursor: null_mut(),
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hbrBackground: null_mut(),
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lpszMenuName: null_mut(),
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};
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RegisterClassA(&wnd_class)
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}
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unsafe fn unregister_wnd_class(wnd_class: ATOM) {
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UnregisterClassA(wnd_class as _, null_mut());
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}
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unsafe fn init_gl_context() {}
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pub struct Window {
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hwnd: HWND,
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hdc: HDC,
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gl_context: HGLRC,
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window_class: ATOM,
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}
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impl Window {
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pub fn open(options: WindowOpenOptions) -> Self {
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unsafe {
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let mut window = Window {
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hwnd: null_mut(),
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hdc: null_mut(),
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gl_context: null_mut(),
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window_class: 0,
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};
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let title = (options.title.to_owned() + "\0").as_ptr() as *const i8;
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window.window_class = register_wnd_class();
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// todo: manage error ^
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let mut flags = WS_POPUPWINDOW
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| WS_CAPTION
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| WS_VISIBLE
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| WS_SIZEBOX
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| WS_MINIMIZEBOX
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| WS_MAXIMIZEBOX
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| WS_CLIPSIBLINGS;
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let mut rect = RECT {
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left: 0,
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top: 0,
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// todo: check if usize fits into i32
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right: options.width as i32,
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bottom: options.height as i32,
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};
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// todo: add check flags https://github.com/wrl/rutabaga/blob/f30ff67e157375cafdbafe5fb549f1790443a3a8/src/platform/win/window.c#L351
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let mut parent = null_mut();
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if let WithParent(p) = options.parent {
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parent = p;
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flags = WS_CHILD | WS_VISIBLE;
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} else {
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AdjustWindowRectEx(&mut rect, flags, FALSE, 0);
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}
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window.hwnd = CreateWindowExA(
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0,
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window.window_class as _,
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title,
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flags,
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0,
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0,
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rect.right - rect.left,
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rect.bottom - rect.top,
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parent as *mut _,
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null_mut(),
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null_mut(),
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null_mut(),
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);
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// todo: manage error ^
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window.hdc = GetDC(window.hwnd);
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//init_gl_context(&window, title);
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let mut pfd: PIXELFORMATDESCRIPTOR = std::mem::zeroed();
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pfd.nSize = std::mem::size_of::<PIXELFORMATDESCRIPTOR>() as u16;
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pfd.nVersion = 1;
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pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.cColorBits = 32;
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// todo: ask wrl why 24 instead of 32?
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pfd.cDepthBits = 24;
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pfd.cStencilBits = 8;
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pfd.iLayerType = PFD_MAIN_PLANE;
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let pf_id: i32 = ChoosePixelFormat(window.hdc, &pfd);
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if pf_id == 0 {
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// todo: use a more useful return like an Option
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// todo: also launch error message boxes
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return window;
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}
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if SetPixelFormat(window.hdc, pf_id, &pfd) == 0 {
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// todo: use a more useful return like an Option
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// todo: also launch error message boxes
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return window;
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}
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window.gl_context = wglCreateContext(window.hdc);
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if window.gl_context == 0 as HGLRC {
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// todo: use a more useful return like an Option
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// todo: also launch error message boxes
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return window;
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}
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if wglMakeCurrent(window.hdc, window.gl_context) == 0 {
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// todo: use a more useful return like an Option
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// todo: also launch error message boxes
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return window;
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}
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let h = LoadLibraryA("opengl32.dll\0".as_ptr() as *const i8);
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gl::load_with(|symbol| {
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let symbol = CString::new(symbol.as_bytes()).unwrap();
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let symbol = symbol.as_ptr();
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GetProcAddress(h, symbol) as *const _
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});
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// todo: decide what to do with the message pump
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if parent.is_null() {
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loop {
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if !handle_msg(null_mut()) {
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break;
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}
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// todo: pass callback rendering function instead
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gl::ClearColor(0.3, 0.8, 0.3, 1.0);
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gl::Clear(gl::COLOR_BUFFER_BIT);
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SwapBuffers(window.hdc);
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}
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}
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window
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}
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}
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pub fn close(&self) {
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// todo: see https://github.com/wrl/rutabaga/blob/f30ff67e157375cafdbafe5fb549f1790443a3a8/src/platform/win/window.c#L402
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unsafe {
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wglMakeCurrent(null_mut(), null_mut());
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wglDeleteContext(self.gl_context);
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ReleaseDC(self.hwnd, self.hdc);
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DestroyWindow(self.hwnd);
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unregister_wnd_class(self.window_class);
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}
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}
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}
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