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-rw-r--r--video/out/w32_common.c152
1 files changed, 117 insertions, 35 deletions
diff --git a/video/out/w32_common.c b/video/out/w32_common.c
index b1c95f78d1..dea0061b71 100644
--- a/video/out/w32_common.c
+++ b/video/out/w32_common.c
@@ -48,8 +48,6 @@
EXTERN_C IMAGE_DOS_HEADER __ImageBase;
#define HINST_THISCOMPONENT ((HINSTANCE)&__ImageBase)
-static const wchar_t classname[] = L"mpv";
-
static __thread struct vo_w32_state *w32_thread_context;
struct vo_w32_state {
@@ -64,6 +62,8 @@ struct vo_w32_state {
HWND window;
HWND parent; // 0 normally, set in embedding mode
+ HHOOK parent_win_hook;
+ HWINEVENTHOOK parent_evt_hook;
HMONITOR monitor; // Handle of the current screen
struct mp_rect screenrc; // Size and virtual position of the current screen
@@ -747,11 +747,19 @@ static LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam,
// is that will make us lose WM_USER wakeups.
mp_input_put_key(w32->input_ctx, MP_KEY_CLOSE_WIN);
return 0;
+ case WM_NCDESTROY: // Sometimes only WM_NCDESTROY is received in --wid mode
case WM_DESTROY:
+ if (w32->destroyed)
+ break;
+ // If terminate is not set, something else destroyed the window. This
+ // can also happen in --wid mode when the parent window is destroyed.
+ if (!w32->terminate)
+ mp_input_put_key(w32->input_ctx, MP_KEY_CLOSE_WIN);
+ RevokeDragDrop(w32->window);
w32->destroyed = true;
w32->window = NULL;
PostQuitMessage(0);
- return 0;
+ break;
case WM_SYSCOMMAND:
switch (wParam) {
case SC_SCREENSAVE:
@@ -901,27 +909,109 @@ static LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam,
return DefWindowProcW(hWnd, message, wParam, lParam);
}
+static pthread_once_t window_class_init_once = PTHREAD_ONCE_INIT;
+static ATOM window_class;
+static void register_window_class(void)
+{
+ window_class = RegisterClassExW(&(WNDCLASSEXW) {
+ .cbSize = sizeof(WNDCLASSEXW),
+ .style = CS_HREDRAW | CS_VREDRAW,
+ .lpfnWndProc = WndProc,
+ .hInstance = HINST_THISCOMPONENT,
+ .hIcon = LoadIconW(HINST_THISCOMPONENT, L"IDI_ICON1"),
+ .hCursor = LoadCursor(NULL, IDC_ARROW),
+ .lpszClassName = L"mpv",
+ });
+}
+
+static ATOM get_window_class(void)
+{
+ pthread_once(&window_class_init_once, register_window_class);
+ return window_class;
+}
+
+static void resize_child_win(HWND parent)
+{
+ // Check if an mpv window is a child of this window. This will not
+ // necessarily be the case because the hook functions will run for all
+ // windows on the parent window's thread.
+ ATOM cls = get_window_class();
+ HWND child = FindWindowExW(parent, NULL, (LPWSTR)MAKEINTATOM(cls), NULL);
+ if (!child)
+ return;
+ // Make sure the window was created by this instance
+ if (GetWindowLongPtrW(child, GWLP_HINSTANCE) != (LONG_PTR)HINST_THISCOMPONENT)
+ return;
+
+ // Resize the mpv window to match its parent window's size
+ RECT rm, rp;
+ if (!GetClientRect(child, &rm))
+ return;
+ if (!GetClientRect(parent, &rp))
+ return;
+ if (EqualRect(&rm, &rp))
+ return;
+ SetWindowPos(child, NULL, 0, 0, rp.right, rp.bottom, SWP_ASYNCWINDOWPOS |
+ SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOOWNERZORDER);
+}
+
+static LRESULT CALLBACK parent_win_hook(int nCode, WPARAM wParam, LPARAM lParam)
+{
+ if (nCode != HC_ACTION)
+ goto done;
+ CWPSTRUCT *cwp = (CWPSTRUCT*)lParam;
+ if (cwp->message != WM_WINDOWPOSCHANGED)
+ goto done;
+ resize_child_win(cwp->hwnd);
+done:
+ return CallNextHookEx(NULL, nCode, wParam, lParam);
+}
+
+static void CALLBACK parent_evt_hook(HWINEVENTHOOK hWinEventHook, DWORD event,
+ HWND hwnd, LONG idObject, LONG idChild, DWORD dwEventThread,
+ DWORD dwmsEventTime)
+{
+ if (event != EVENT_OBJECT_LOCATIONCHANGE)
+ return;
+ if (!hwnd || idObject != OBJID_WINDOW || idChild != CHILDID_SELF)
+ return;
+ resize_child_win(hwnd);
+}
+
+static void install_parent_hook(struct vo_w32_state *w32)
+{
+ DWORD pid;
+ DWORD tid = GetWindowThreadProcessId(w32->parent, &pid);
+
+ // If the parent lives inside the current process, install a Windows hook
+ if (pid == GetCurrentProcessId()) {
+ w32->parent_win_hook = SetWindowsHookExW(WH_CALLWNDPROC,
+ parent_win_hook, NULL, tid);
+ } else {
+ // Otherwise, use a WinEvent hook. These don't seem to be as smooth as
+ // Windows hooks, but they can be delivered across process boundaries.
+ w32->parent_evt_hook = SetWinEventHook(
+ EVENT_OBJECT_LOCATIONCHANGE, EVENT_OBJECT_LOCATIONCHANGE,
+ NULL, parent_evt_hook, pid, tid, WINEVENT_OUTOFCONTEXT);
+ }
+}
+
+static void remove_parent_hook(struct vo_w32_state *w32)
+{
+ if (w32->parent_win_hook)
+ UnhookWindowsHookEx(w32->parent_win_hook);
+ if (w32->parent_evt_hook)
+ UnhookWinEvent(w32->parent_evt_hook);
+}
+
// Dispatch incoming window events and handle them.
// This returns only when the thread is asked to terminate.
static void run_message_loop(struct vo_w32_state *w32)
{
MSG msg;
- while (GetMessageW(&msg, 0, 0, 0) > 0) {
+ while (GetMessageW(&msg, 0, 0, 0) > 0)
DispatchMessageW(&msg);
- if (w32->parent) {
- RECT r, rp;
- BOOL res = GetClientRect(w32->window, &r);
- res = res && GetClientRect(w32->parent, &rp);
- if (res && (r.right != rp.right || r.bottom != rp.bottom))
- MoveWindow(w32->window, 0, 0, rp.right, rp.bottom, FALSE);
-
- // Window has probably been closed, e.g. due to parent program crash
- if (!IsWindow(w32->parent))
- mp_input_put_key(w32->input_ctx, MP_KEY_CLOSE_WIN);
- }
- }
-
// Even if the message loop somehow exits, we still have to respond to
// external requests until termination is requested.
while (!w32->terminate)
@@ -1222,33 +1312,26 @@ static void *gui_thread(void *ptr)
thread_disable_ime();
- WNDCLASSEXW wcex = {
- .cbSize = sizeof wcex,
- .style = CS_HREDRAW | CS_VREDRAW,
- .lpfnWndProc = WndProc,
- .hInstance = HINST_THISCOMPONENT,
- .hIcon = LoadIconW(HINST_THISCOMPONENT, L"IDI_ICON1"),
- .hCursor = LoadCursor(NULL, IDC_ARROW),
- .lpszClassName = classname,
- };
- RegisterClassExW(&wcex);
-
w32_thread_context = w32;
if (w32->opts->WinID >= 0)
w32->parent = (HWND)(intptr_t)(w32->opts->WinID);
+ ATOM cls = get_window_class();
if (w32->parent) {
RECT r;
GetClientRect(w32->parent, &r);
- w32->window = CreateWindowExW(WS_EX_NOPARENTNOTIFY, classname,
- classname,
+ w32->window = CreateWindowExW(WS_EX_NOPARENTNOTIFY,
+ (LPWSTR)MAKEINTATOM(cls), L"mpv",
WS_CHILD | WS_VISIBLE,
0, 0, r.right, r.bottom,
w32->parent, 0, HINST_THISCOMPONENT, NULL);
+
+ // Install a hook to get notifications when the parent changes size
+ if (w32->window)
+ install_parent_hook(w32);
} else {
- w32->window = CreateWindowExW(0, classname,
- classname,
+ w32->window = CreateWindowExW(0, (LPWSTR)MAKEINTATOM(cls), L"mpv",
update_style(w32, 0),
CW_USEDEFAULT, SW_HIDE, 100, 100,
0, 0, HINST_THISCOMPONENT, NULL);
@@ -1323,10 +1406,9 @@ done:
MP_VERBOSE(w32, "uninit\n");
- if (w32->window) {
- RevokeDragDrop(w32->window);
+ remove_parent_hook(w32);
+ if (w32->window && !w32->destroyed)
DestroyWindow(w32->window);
- }
if (w32->taskbar_list)
ITaskbarList2_Release(w32->taskbar_list);
if (w32->taskbar_list3)
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 07:30:06 +0000