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9c90c902c1
mpv/video/out/w32_common.c
pavelxdd 9c90c902c1 win32: snap to screen edges 
Disabled by default. The snap sensitivity value depends on
the screen DPI. The default value is 16px on a 96 DPI screen.

Fixes #2248
2017-01-27 12:00:32 +01:00

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <limits.h>
#include <pthread.h>
#include <assert.h>
#include <windows.h>
#include <windowsx.h>
#include <dwmapi.h>
#include <ole2.h>
#include <shobjidl.h>
#include <avrt.h>
#include "options/options.h"
#include "input/keycodes.h"
#include "input/input.h"
#include "input/event.h"
#include "stream/stream.h"
#include "common/msg.h"
#include "common/common.h"
#include "vo.h"
#include "win_state.h"
#include "w32_common.h"
#include "win32/displayconfig.h"
#include "osdep/io.h"
#include "osdep/threads.h"
#include "osdep/w32_keyboard.h"
#include "osdep/atomic.h"
#include "misc/dispatch.h"
#include "misc/rendezvous.h"
#include "mpv_talloc.h"
EXTERN_C IMAGE_DOS_HEADER __ImageBase;
#define HINST_THISCOMPONENT ((HINSTANCE)&__ImageBase)
#ifndef WM_DPICHANGED
#define WM_DPICHANGED (0x02E0)
#endif
#ifndef DPI_ENUMS_DECLARED
typedef enum MONITOR_DPI_TYPE {
MDT_EFFECTIVE_DPI = 0,
MDT_ANGULAR_DPI = 1,
MDT_RAW_DPI = 2,
MDT_DEFAULT = MDT_EFFECTIVE_DPI
} MONITOR_DPI_TYPE;
#endif
static __thread struct vo_w32_state *w32_thread_context;
struct w32_api {
HRESULT (WINAPI *pGetDpiForMonitor)(HMONITOR, MONITOR_DPI_TYPE, UINT*, UINT*);
};
struct vo_w32_state {
struct mp_log *log;
struct vo *vo;
struct mp_vo_opts *opts;
struct input_ctx *input_ctx;
pthread_t thread;
bool terminate;
struct mp_dispatch_queue *dispatch; // used to run stuff on the GUI thread
struct w32_api api; // stores functions from dynamically loaded DLLs
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
char *color_profile; // Path of the current screen's color profile
// last non-fullscreen extends (updated only on fullscreen or on initialization)
int prev_width;
int prev_height;
int prev_x;
int prev_y;
// Has the window seen a WM_DESTROY? If so, don't call DestroyWindow again.
bool destroyed;
// whether the window position and size were intialized
bool window_bounds_initialized;
bool current_fs;
// currently known window state
int window_x;
int window_y;
int dw;
int dh;
// video size
uint32_t o_dwidth;
uint32_t o_dheight;
int dpi;
bool disable_screensaver;
bool cursor_visible;
atomic_uint event_flags;
BOOL tracking;
TRACKMOUSEEVENT trackEvent;
int mouse_x;
int mouse_y;
// Should SetCursor be called when handling VOCTRL_SET_CURSOR_VISIBILITY?
bool can_set_cursor;
// UTF-16 decoding state for WM_CHAR and VK_PACKET
int high_surrogate;
ITaskbarList2 *taskbar_list;
ITaskbarList3 *taskbar_list3;
UINT tbtnCreatedMsg;
bool tbtnCreated;
struct voctrl_playback_state current_pstate;
// updates on move/resize/displaychange
double display_fps;
bool snapped;
int snap_dx;
int snap_dy;
HANDLE avrt_handle;
};
typedef struct tagDropTarget {
IDropTarget iface;
atomic_int refCnt;
DWORD lastEffect;
IDataObject* dataObj;
struct vo_w32_state *w32;
} DropTarget;
static FORMATETC fmtetc_file = { CF_HDROP, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
static FORMATETC fmtetc_url = { 0, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
static void DropTarget_Destroy(DropTarget* This)
{
if (This->dataObj != NULL) {
This->dataObj->lpVtbl->Release(This->dataObj);
This->dataObj->lpVtbl = NULL;
}
talloc_free(This);
}
static HRESULT STDMETHODCALLTYPE DropTarget_QueryInterface(IDropTarget* This,
REFIID riid,
void** ppvObject)
{
if (!IsEqualGUID(riid, &IID_IUnknown) ||
!IsEqualGUID(riid, &IID_IDataObject)) {
*ppvObject = NULL;
return E_NOINTERFACE;
}
*ppvObject = This;
This->lpVtbl->AddRef(This);
return S_OK;
}
static ULONG STDMETHODCALLTYPE DropTarget_AddRef(IDropTarget* This)
{
DropTarget* t = (DropTarget*)This;
return atomic_fetch_add(&t->refCnt, 1) + 1;
}
static ULONG STDMETHODCALLTYPE DropTarget_Release(IDropTarget* This)
{
DropTarget* t = (DropTarget*)This;
ULONG cRef = atomic_fetch_add(&t->refCnt, -1) - 1;
if (cRef == 0) {
DropTarget_Destroy(t);
}
return cRef;
}
static HRESULT STDMETHODCALLTYPE DropTarget_DragEnter(IDropTarget* This,
IDataObject* pDataObj,
DWORD grfKeyState,
POINTL pt,
DWORD* pdwEffect)
{
DropTarget* t = (DropTarget*)This;
pDataObj->lpVtbl->AddRef(pDataObj);
if (pDataObj->lpVtbl->QueryGetData(pDataObj, &fmtetc_file) != S_OK &&
pDataObj->lpVtbl->QueryGetData(pDataObj, &fmtetc_url) != S_OK) {
*pdwEffect = DROPEFFECT_NONE;
}
if (t->dataObj != NULL) {
t->dataObj->lpVtbl->Release(t->dataObj);
}
t->dataObj = pDataObj;
t->lastEffect = *pdwEffect;
return S_OK;
}
static HRESULT STDMETHODCALLTYPE DropTarget_DragOver(IDropTarget* This,
DWORD grfKeyState,
POINTL pt,
DWORD* pdwEffect)
{
DropTarget* t = (DropTarget*)This;
*pdwEffect = t->lastEffect;
return S_OK;
}
static HRESULT STDMETHODCALLTYPE DropTarget_DragLeave(IDropTarget* This)
{
DropTarget* t = (DropTarget*)This;
if (t->dataObj != NULL) {
t->dataObj->lpVtbl->Release(t->dataObj);
t->dataObj = NULL;
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE DropTarget_Drop(IDropTarget* This,
IDataObject* pDataObj,
DWORD grfKeyState, POINTL pt,
DWORD* pdwEffect)
{
DropTarget* t = (DropTarget*)This;
STGMEDIUM medium;
if (t->dataObj != NULL) {
t->dataObj->lpVtbl->Release(t->dataObj);
t->dataObj = NULL;
}
enum mp_dnd_action action = (grfKeyState & MK_SHIFT) ? DND_APPEND : DND_REPLACE;
pDataObj->lpVtbl->AddRef(pDataObj);
if (pDataObj->lpVtbl->GetData(pDataObj, &fmtetc_file, &medium) == S_OK) {
if (GlobalLock(medium.hGlobal) != NULL) {
HDROP hDrop = (HDROP)medium.hGlobal;
UINT numFiles = DragQueryFileW(hDrop, 0xFFFFFFFF, NULL, 0);
char** files = talloc_zero_array(NULL, char*, numFiles);
UINT nrecvd_files = 0;
for (UINT i = 0; i < numFiles; i++) {
UINT len = DragQueryFileW(hDrop, i, NULL, 0);
wchar_t* buf = talloc_array(NULL, wchar_t, len + 1);
if (DragQueryFileW(hDrop, i, buf, len + 1) == len) {
char* fname = mp_to_utf8(files, buf);
files[nrecvd_files++] = fname;
MP_VERBOSE(t->w32, "received dropped file: %s\n",
fname);
} else {
MP_ERR(t->w32, "error getting dropped file name\n");
}
talloc_free(buf);
}
GlobalUnlock(medium.hGlobal);
mp_event_drop_files(t->w32->input_ctx, nrecvd_files, files,
action);
talloc_free(files);
}
ReleaseStgMedium(&medium);
} else if (pDataObj->lpVtbl->GetData(pDataObj,
&fmtetc_url, &medium) == S_OK) {
// get the URL encoded in US-ASCII
wchar_t* wurl = GlobalLock(medium.hGlobal);
if (wurl != NULL) {
char *url = mp_to_utf8(NULL, wurl);
if (mp_event_drop_mime_data(t->w32->input_ctx, "text/uri-list",
bstr0(url), action) > 0) {
MP_VERBOSE(t->w32, "received dropped URL: %s\n", url);
} else {
MP_ERR(t->w32, "error getting dropped URL\n");
}
talloc_free(url);
GlobalUnlock(medium.hGlobal);
}
ReleaseStgMedium(&medium);
}
else {
t->lastEffect = DROPEFFECT_NONE;
}
pDataObj->lpVtbl->Release(pDataObj);
*pdwEffect = t->lastEffect;
return S_OK;
}
static void DropTarget_Init(DropTarget* This, struct vo_w32_state *w32)
{
IDropTargetVtbl* vtbl = talloc(This, IDropTargetVtbl);
*vtbl = (IDropTargetVtbl){
DropTarget_QueryInterface, DropTarget_AddRef, DropTarget_Release,
DropTarget_DragEnter, DropTarget_DragOver, DropTarget_DragLeave,
DropTarget_Drop
};
This->iface.lpVtbl = vtbl;
atomic_store(&This->refCnt, 0);
This->lastEffect = 0;
This->dataObj = NULL;
This->w32 = w32;
}
static void add_window_borders(HWND hwnd, RECT *rc)
{
AdjustWindowRect(rc, GetWindowLongPtrW(hwnd, GWL_STYLE), 0);
}
// basically a reverse AdjustWindowRect (win32 doesn't appear to have this)
static void subtract_window_borders(HWND hwnd, RECT *rc)
{
RECT b = { 0, 0, 0, 0 };
add_window_borders(hwnd, &b);
rc->left -= b.left;
rc->top -= b.top;
rc->right -= b.right;
rc->bottom -= b.bottom;
}
static LRESULT borderless_nchittest(struct vo_w32_state *w32, int x, int y)
{
if (IsMaximized(w32->window))
return HTCLIENT;
POINT mouse = { x, y };
ScreenToClient(w32->window, &mouse);
// The horizontal frame should be the same size as the vertical frame,
// since the NONCLIENTMETRICS structure does not distinguish between them
int frame_size = GetSystemMetrics(SM_CXFRAME) +
GetSystemMetrics(SM_CXPADDEDBORDER);
// The diagonal size handles are slightly wider than the side borders
int diagonal_width = frame_size * 2 + GetSystemMetrics(SM_CXBORDER);
// Hit-test top border
if (mouse.y < frame_size) {
if (mouse.x < diagonal_width)
return HTTOPLEFT;
if (mouse.x >= w32->dw - diagonal_width)
return HTTOPRIGHT;
return HTTOP;
}
// Hit-test bottom border
if (mouse.y >= w32->dh - frame_size) {
if (mouse.x < diagonal_width)
return HTBOTTOMLEFT;
if (mouse.x >= w32->dw - diagonal_width)
return HTBOTTOMRIGHT;
return HTBOTTOM;
}
// Hit-test side borders
if (mouse.x < frame_size)
return HTLEFT;
if (mouse.x >= w32->dw - frame_size)
return HTRIGHT;
return HTCLIENT;
}
// turn a WMSZ_* input value in v into the border that should be resized
// returns: 0=left, 1=top, 2=right, 3=bottom, -1=undefined
static int get_resize_border(int v)
{
switch (v) {
case WMSZ_LEFT: return 3;
case WMSZ_TOP: return 2;
case WMSZ_RIGHT: return 3;
case WMSZ_BOTTOM: return 2;
case WMSZ_TOPLEFT: return 1;
case WMSZ_TOPRIGHT: return 1;
case WMSZ_BOTTOMLEFT: return 3;
case WMSZ_BOTTOMRIGHT: return 3;
default: return -1;
}
}
static bool key_state(int vk)
{
return GetKeyState(vk) & 0x8000;
}
static int mod_state(struct vo_w32_state *w32)
{
int res = 0;
// AltGr is represented as LCONTROL+RMENU on Windows
bool alt_gr = mp_input_use_alt_gr(w32->input_ctx) &&
key_state(VK_RMENU) && key_state(VK_LCONTROL);
if (key_state(VK_RCONTROL) || (key_state(VK_LCONTROL) && !alt_gr))
res |= MP_KEY_MODIFIER_CTRL;
if (key_state(VK_SHIFT))
res |= MP_KEY_MODIFIER_SHIFT;
if (key_state(VK_LMENU) || (key_state(VK_RMENU) && !alt_gr))
res |= MP_KEY_MODIFIER_ALT;
return res;
}
static int decode_surrogate_pair(wchar_t lead, wchar_t trail)
{
return 0x10000 + (((lead & 0x3ff) << 10) | (trail & 0x3ff));
}
static int decode_utf16(struct vo_w32_state *w32, wchar_t c)
{
// Decode UTF-16, keeping state in w32->high_surrogate
if (IS_HIGH_SURROGATE(c)) {
w32->high_surrogate = c;
return 0;
}
if (IS_LOW_SURROGATE(c)) {
if (!w32->high_surrogate) {
MP_ERR(w32, "Invalid UTF-16 input\n");
return 0;
}
int codepoint = decode_surrogate_pair(w32->high_surrogate, c);
w32->high_surrogate = 0;
return codepoint;
}
if (w32->high_surrogate != 0) {
w32->high_surrogate = 0;
MP_ERR(w32, "Invalid UTF-16 input\n");
return 0;
}
return c;
}
static void clear_keyboard_buffer(void)
{
static const UINT vkey = VK_DECIMAL;
static const BYTE keys[256] = { 0 };
UINT scancode = MapVirtualKey(vkey, MAPVK_VK_TO_VSC);
wchar_t buf[10];
int ret = 0;
// Use the method suggested by Michael Kaplan to clear any pending dead
// keys from the current keyboard layout. See:
// https://web.archive.org/web/20101004154432/http://blogs.msdn.com/b/michkap/archive/2006/04/06/569632.aspx
// https://web.archive.org/web/20100820152419/http://blogs.msdn.com/b/michkap/archive/2007/10/27/5717859.aspx
do {
ret = ToUnicode(vkey, scancode, keys, buf, MP_ARRAY_SIZE(buf), 0);
} while (ret < 0);
}
static int to_unicode(UINT vkey, UINT scancode, const BYTE keys[256])
{
// This wraps ToUnicode to be stateless and to return only one character
// Make the buffer 10 code units long to be safe, same as here:
// https://web.archive.org/web/20101013215215/http://blogs.msdn.com/b/michkap/archive/2006/03/24/559169.aspx
wchar_t buf[10] = { 0 };
// Dead keys aren't useful for key shortcuts, so clear the keyboard state
clear_keyboard_buffer();
int len = ToUnicode(vkey, scancode, keys, buf, MP_ARRAY_SIZE(buf), 0);
// Return the last complete UTF-16 code point. A negative return value
// indicates a dead key, however there should still be a non-combining
// version of the key in the buffer.
if (len < 0)
len = -len;
if (len >= 2 && IS_SURROGATE_PAIR(buf[len - 2], buf[len - 1]))
return decode_surrogate_pair(buf[len - 2], buf[len - 1]);
if (len >= 1)
return buf[len - 1];
return 0;
}
static int decode_key(struct vo_w32_state *w32, UINT vkey, UINT scancode)
{
BYTE keys[256];
GetKeyboardState(keys);
// If mp_input_use_alt_gr is false, detect and remove AltGr so normal
// characters are generated. Note that AltGr is represented as
// LCONTROL+RMENU on Windows.
if ((keys[VK_RMENU] & 0x80) && (keys[VK_LCONTROL] & 0x80) &&
!mp_input_use_alt_gr(w32->input_ctx))
{
keys[VK_RMENU] = keys[VK_LCONTROL] = 0;
keys[VK_MENU] = keys[VK_LMENU];
keys[VK_CONTROL] = keys[VK_RCONTROL];
}
int c = to_unicode(vkey, scancode, keys);
// Some shift states prevent ToUnicode from working or cause it to produce
// control characters. If this is detected, remove modifiers until it
// starts producing normal characters.
if (c < 0x20 && (keys[VK_MENU] & 0x80)) {
keys[VK_LMENU] = keys[VK_RMENU] = keys[VK_MENU] = 0;
c = to_unicode(vkey, scancode, keys);
}
if (c < 0x20 && (keys[VK_CONTROL] & 0x80)) {
keys[VK_LCONTROL] = keys[VK_RCONTROL] = keys[VK_CONTROL] = 0;
c = to_unicode(vkey, scancode, keys);
}
if (c < 0x20)
return 0;
// Decode lone UTF-16 surrogates (VK_PACKET can generate these)
if (c < 0x10000)
return decode_utf16(w32, c);
return c;
}
static void handle_key_down(struct vo_w32_state *w32, UINT vkey, UINT scancode)
{
// Ignore key repeat
if (scancode & KF_REPEAT)
return;
int mpkey = mp_w32_vkey_to_mpkey(vkey, scancode & KF_EXTENDED);
if (!mpkey) {
mpkey = decode_key(w32, vkey, scancode & (0xff | KF_EXTENDED));
if (!mpkey)
return;
}
mp_input_put_key(w32->input_ctx, mpkey | mod_state(w32) | MP_KEY_STATE_DOWN);
}
static void handle_key_up(struct vo_w32_state *w32, UINT vkey, UINT scancode)
{
switch (vkey) {
case VK_MENU:
case VK_CONTROL:
case VK_SHIFT:
break;
default:
// Releasing all keys on key-up is simpler and ensures no keys can be
// get "stuck." This matches the behaviour of other VOs.
mp_input_put_key(w32->input_ctx, MP_INPUT_RELEASE_ALL);
}
}
static bool handle_char(struct vo_w32_state *w32, wchar_t wc)
{
int c = decode_utf16(w32, wc);
if (c == 0)
return true;
if (c < 0x20)
return false;
mp_input_put_key(w32->input_ctx, c | mod_state(w32));
return true;
}
static void signal_events(struct vo_w32_state *w32, int events)
{
atomic_fetch_or(&w32->event_flags, events);
vo_wakeup(w32->vo);
}
static void wakeup_gui_thread(void *ctx)
{
struct vo_w32_state *w32 = ctx;
PostMessage(w32->window, WM_USER, 0, 0);
}
static double get_refresh_rate_from_gdi(const wchar_t *device)
{
DEVMODEW dm = { .dmSize = sizeof dm };
if (!EnumDisplaySettingsW(device, ENUM_CURRENT_SETTINGS, &dm))
return 0.0;
// May return 0 or 1 which "represent the display hardware's default refresh rate"
// https://msdn.microsoft.com/en-us/library/windows/desktop/dd183565%28v=vs.85%29.aspx
// mpv validates this value with a threshold of 1, so don't return exactly 1
if (dm.dmDisplayFrequency == 1)
return 0.0;
// dm.dmDisplayFrequency is an integer which is rounded down, so it's
// highly likely that 23 represents 24/1.001, 59 represents 60/1.001, etc.
// A caller can always reproduce the original value by using floor.
double rv = dm.dmDisplayFrequency;
switch (dm.dmDisplayFrequency) {
case 23:
case 29:
case 47:
case 59:
case 71:
case 89:
case 95:
case 119:
case 143:
rv = (rv + 1) / 1.001;
}
return rv;
}
static char *get_color_profile(void *ctx, const wchar_t *device)
{
char *name = NULL;
HDC ic = CreateICW(device, NULL, NULL, NULL);
if (!ic)
goto done;
wchar_t wname[MAX_PATH + 1];
if (!GetICMProfileW(ic, &(DWORD){ MAX_PATH }, wname))
goto done;
name = mp_to_utf8(ctx, wname);
done:
if (ic)
DeleteDC(ic);
return name;
}
static void update_dpi(struct vo_w32_state *w32)
{
UINT dpiX, dpiY;
if (w32->api.pGetDpiForMonitor && w32->api.pGetDpiForMonitor(w32->monitor,
MDT_EFFECTIVE_DPI, &dpiX, &dpiY) == S_OK) {
w32->dpi = (int)dpiX;
MP_VERBOSE(w32, "DPI detected from the new API: %d\n", w32->dpi);
return;
}
HDC hdc = GetDC(NULL);
if (hdc) {
w32->dpi = GetDeviceCaps(hdc, LOGPIXELSX);
ReleaseDC(NULL, hdc);
MP_VERBOSE(w32, "DPI detected from the old API: %d\n", w32->dpi);
} else {
w32->dpi = 96;
MP_VERBOSE(w32, "Couldn't determine DPI, falling back to %d\n", w32->dpi);
}
}
static void update_display_info(struct vo_w32_state *w32)
{
HMONITOR monitor = MonitorFromWindow(w32->window, MONITOR_DEFAULTTOPRIMARY);
if (w32->monitor == monitor)
return;
w32->monitor = monitor;
update_dpi(w32);
MONITORINFOEXW mi = { .cbSize = sizeof mi };
GetMonitorInfoW(monitor, (MONITORINFO*)&mi);
// Try to get the monitor refresh rate.
double freq = 0.0;
if (freq == 0.0)
freq = mp_w32_displayconfig_get_refresh_rate(mi.szDevice);
if (freq == 0.0)
freq = get_refresh_rate_from_gdi(mi.szDevice);
if (freq != w32->display_fps) {
MP_VERBOSE(w32, "display-fps: %f\n", freq);
if (freq == 0.0)
MP_WARN(w32, "Couldn't determine monitor refresh rate\n");
w32->display_fps = freq;
signal_events(w32, VO_EVENT_WIN_STATE);
}
char *color_profile = get_color_profile(w32, mi.szDevice);
if ((color_profile == NULL) != (w32->color_profile == NULL) ||
(color_profile && strcmp(color_profile, w32->color_profile)))
{
if (color_profile)
MP_VERBOSE(w32, "color-profile: %s\n", color_profile);
talloc_free(w32->color_profile);
w32->color_profile = color_profile;
color_profile = NULL;
signal_events(w32, VO_EVENT_ICC_PROFILE_CHANGED);
}
talloc_free(color_profile);
}
static void force_update_display_info(struct vo_w32_state *w32)
{
w32->monitor = 0;
update_display_info(w32);
}
static void update_playback_state(struct vo_w32_state *w32)
{
struct voctrl_playback_state *pstate = &w32->current_pstate;
if (!w32->taskbar_list3 || !w32->tbtnCreated)
return;
if (!pstate->playing || !pstate->taskbar_progress) {
ITaskbarList3_SetProgressState(w32->taskbar_list3, w32->window,
TBPF_NOPROGRESS);
return;
}
ITaskbarList3_SetProgressValue(w32->taskbar_list3, w32->window,
pstate->percent_pos, 100);
ITaskbarList3_SetProgressState(w32->taskbar_list3, w32->window,
pstate->paused ? TBPF_PAUSED :
TBPF_NORMAL);
}
static bool snap_to_screen_edges(struct vo_w32_state *w32, RECT *rc)
{
if (!w32->opts->snap_window) {
w32->snapped = false;
return false;
}
RECT rect;
POINT cursor;
if (!GetWindowRect(w32->window, &rect) || !GetCursorPos(&cursor))
return false;
// Check for aero snapping
if ((rc->right - rc->left != rect.right - rect.left) ||
(rc->bottom - rc->top != rect.bottom - rect.top))
return false;
MONITORINFO mi = { .cbSize = sizeof(mi) };
if (!GetMonitorInfoW(w32->monitor, &mi))
return false;
// Get the work area to let the window snap to taskbar
RECT wr = mi.rcWork;
// Check for invisible borders and adjust the work area size
RECT frame = {0};
if (DwmGetWindowAttribute(w32->window, DWMWA_EXTENDED_FRAME_BOUNDS,
&frame, sizeof(RECT)) == S_OK) {
wr.left -= frame.left - rect.left;
wr.top -= frame.top - rect.top;
wr.right += rect.right - frame.right;
wr.bottom += rect.bottom - frame.bottom;
}
// Let the window to unsnap by changing its position,
// otherwise it will stick to the screen edges forever
rect = *rc;
if (w32->snapped) {
OffsetRect(&rect, cursor.x - rect.left - w32->snap_dx,
cursor.y - rect.top - w32->snap_dy);
}
int threshold = (w32->dpi * 16) / 96;
bool snapped = false;
// Adjust X position
if (abs(rect.left - wr.left) < threshold) {
snapped = true;
OffsetRect(&rect, wr.left - rect.left, 0);
} else if (abs(rect.right - wr.right) < threshold) {
snapped = true;
OffsetRect(&rect, wr.right - rect.right, 0);
}
// Adjust Y position
if (abs(rect.top - wr.top) < threshold) {
snapped = true;
OffsetRect(&rect, 0, wr.top - rect.top);
} else if (abs(rect.bottom - wr.bottom) < threshold) {
snapped = true;
OffsetRect(&rect, 0, wr.bottom - rect.bottom);
}
if (!w32->snapped && snapped) {
w32->snap_dx = cursor.x - rc->left;
w32->snap_dy = cursor.y - rc->top;
}
w32->snapped = snapped;
*rc = rect;
return true;
}
static LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam)
{
assert(w32_thread_context);
struct vo_w32_state *w32 = w32_thread_context;
if (!w32->window)
w32->window = hWnd; // can happen during CreateWindow*!
assert(w32->window == hWnd);
int mouse_button = 0;
switch (message) {
case WM_USER:
// This message is used to wakeup the GUI thread, see wakeup_gui_thread.
mp_dispatch_queue_process(w32->dispatch, 0);
break;
case WM_ERASEBKGND: // no need to erase background separately
return 1;
case WM_PAINT:
signal_events(w32, VO_EVENT_EXPOSE);
break;
case WM_MOVE: {
POINT p = {0};
ClientToScreen(w32->window, &p);
w32->window_x = p.x;
w32->window_y = p.y;
// Window may intersect with new monitors (see VOCTRL_GET_DISPLAY_NAMES)
signal_events(w32, VO_EVENT_WIN_STATE);
update_display_info(w32); // if we moved between monitors
MP_DBG(w32, "move window: %d:%d\n", w32->window_x, w32->window_y);
break;
}
case WM_MOVING: {
RECT *rc = (RECT*)lParam;
if (snap_to_screen_edges(w32, rc))
return TRUE;
break;
}
case WM_ENTERSIZEMOVE:
if (w32->snapped) {
// Save the cursor offset from the window borders,
// so the player window can be unsnapped later
RECT rc;
POINT cursor;
if (GetWindowRect(w32->window, &rc) && GetCursorPos(&cursor)) {
w32->snap_dx = cursor.x - rc.left;
w32->snap_dy = cursor.y - rc.top;
}
}
break;
case WM_SIZE: {
RECT r;
if (GetClientRect(w32->window, &r) && r.right > 0 && r.bottom > 0) {
w32->dw = r.right;
w32->dh = r.bottom;
signal_events(w32, VO_EVENT_RESIZE);
MP_VERBOSE(w32, "resize window: %d:%d\n", w32->dw, w32->dh);
}
// Window may have been minimized or restored
signal_events(w32, VO_EVENT_WIN_STATE);
update_display_info(w32);
break;
}
case WM_SIZING:
if (w32->opts->keepaspect && w32->opts->keepaspect_window &&
!w32->current_fs && !w32->parent)
{
RECT *rc = (RECT*)lParam;
// get client area of the windows if it had the rect rc
// (subtracting the window borders)
RECT r = *rc;
subtract_window_borders(w32->window, &r);
int c_w = r.right - r.left, c_h = r.bottom - r.top;
float aspect = w32->o_dwidth / (float) MPMAX(w32->o_dheight, 1);
int d_w = c_h * aspect - c_w;
int d_h = c_w / aspect - c_h;
int d_corners[4] = { d_w, d_h, -d_w, -d_h };
int corners[4] = { rc->left, rc->top, rc->right, rc->bottom };
int corner = get_resize_border(wParam);
if (corner >= 0)
corners[corner] -= d_corners[corner];
*rc = (RECT) { corners[0], corners[1], corners[2], corners[3] };
return TRUE;
}
break;
case WM_DPICHANGED:
update_display_info(w32);
break;
case WM_CLOSE:
// Don't actually allow it to destroy the window, or whatever else it
// 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);
break;
case WM_SYSCOMMAND:
switch (wParam & 0xFFF0) {
case SC_SCREENSAVE:
case SC_MONITORPOWER:
if (w32->disable_screensaver) {
MP_VERBOSE(w32, "killing screensaver\n");
return 0;
}
break;
}
break;
case WM_NCHITTEST:
// Provide sizing handles for borderless windows
if (!w32->opts->border && !w32->current_fs) {
return borderless_nchittest(w32, GET_X_LPARAM(lParam),
GET_Y_LPARAM(lParam));
}
break;
case WM_SYSKEYDOWN:
// Open the window menu on Alt+Space. Normally DefWindowProc opens the
// window menu in response to WM_SYSCHAR, but since mpv translates its
// own keyboard input, WM_SYSCHAR isn't generated, so the window menu
// must be opened manually.
if (wParam == VK_SPACE) {
SendMessage(w32->window, WM_SYSCOMMAND, SC_KEYMENU, ' ');
return 0;
}
// Handle all other WM_SYSKEYDOWN messages as WM_KEYDOWN
case WM_KEYDOWN:
handle_key_down(w32, wParam, HIWORD(lParam));
if (wParam == VK_F10)
return 0;
break;
case WM_SYSKEYUP:
case WM_KEYUP:
handle_key_up(w32, wParam, HIWORD(lParam));
if (wParam == VK_F10)
return 0;
break;
case WM_CHAR:
case WM_SYSCHAR:
if (handle_char(w32, wParam))
return 0;
break;
case WM_KILLFOCUS:
mp_input_put_key(w32->input_ctx, MP_INPUT_RELEASE_ALL);
break;
case WM_SETCURSOR:
// The cursor should only be hidden if the mouse is in the client area
// and if the window isn't in menu mode (HIWORD(lParam) is non-zero)
w32->can_set_cursor = LOWORD(lParam) == HTCLIENT && HIWORD(lParam);
if (w32->can_set_cursor && !w32->cursor_visible) {
SetCursor(NULL);
return TRUE;
}
break;
case WM_MOUSELEAVE:
w32->tracking = FALSE;
mp_input_put_key(w32->input_ctx, MP_KEY_MOUSE_LEAVE);
break;
case WM_MOUSEMOVE: {
if (!w32->tracking) {
w32->tracking = TrackMouseEvent(&w32->trackEvent);
mp_input_put_key(w32->input_ctx, MP_KEY_MOUSE_ENTER);
}
// Windows can send spurious mouse events, which would make the mpv
// core unhide the mouse cursor on completely unrelated events. See:
// https://blogs.msdn.com/b/oldnewthing/archive/2003/10/01/55108.aspx
int x = GET_X_LPARAM(lParam);
int y = GET_Y_LPARAM(lParam);
if (x != w32->mouse_x || y != w32->mouse_y) {
w32->mouse_x = x;
w32->mouse_y = y;
mp_input_set_mouse_pos(w32->input_ctx, x, y);
}
break;
}
case WM_LBUTTONDOWN:
mouse_button = MP_MOUSE_BTN0 | MP_KEY_STATE_DOWN;
break;
case WM_LBUTTONUP:
mouse_button = MP_MOUSE_BTN0 | MP_KEY_STATE_UP;
break;
case WM_MBUTTONDOWN:
mouse_button = MP_MOUSE_BTN1 | MP_KEY_STATE_DOWN;
break;
case WM_MBUTTONUP:
mouse_button = MP_MOUSE_BTN1 | MP_KEY_STATE_UP;
break;
case WM_RBUTTONDOWN:
mouse_button = MP_MOUSE_BTN2 | MP_KEY_STATE_DOWN;
break;
case WM_RBUTTONUP:
mouse_button = MP_MOUSE_BTN2 | MP_KEY_STATE_UP;
break;
case WM_MOUSEWHEEL: {
int x = GET_WHEEL_DELTA_WPARAM(wParam);
mouse_button = x > 0 ? MP_MOUSE_BTN3 : MP_MOUSE_BTN4;
break;
}
case WM_XBUTTONDOWN:
mouse_button = HIWORD(wParam) == 1 ? MP_MOUSE_BTN5 : MP_MOUSE_BTN6;
mouse_button |= MP_KEY_STATE_DOWN;
break;
case WM_XBUTTONUP:
mouse_button = HIWORD(wParam) == 1 ? MP_MOUSE_BTN5 : MP_MOUSE_BTN6;
mouse_button |= MP_KEY_STATE_UP;
break;
case WM_DISPLAYCHANGE:
force_update_display_info(w32);
break;
}
if (message == w32->tbtnCreatedMsg) {
w32->tbtnCreated = true;
update_playback_state(w32);
return 0;
}
if (mouse_button) {
mouse_button |= mod_state(w32);
mp_input_put_key(w32->input_ctx, mouse_button);
if (mp_input_mouse_enabled(w32->input_ctx)) {
int x = GET_X_LPARAM(lParam);
int y = GET_Y_LPARAM(lParam);
if (mouse_button == (MP_MOUSE_BTN0 | MP_KEY_STATE_DOWN) &&
!w32->current_fs &&
!mp_input_test_dragging(w32->input_ctx, x, y))
{
// Window dragging hack
ReleaseCapture();
SendMessage(hWnd, WM_NCLBUTTONDOWN, HTCAPTION, 0);
mp_input_put_key(w32->input_ctx, MP_MOUSE_BTN0 |
MP_KEY_STATE_UP);
return 0;
}
}
if (mouse_button & MP_KEY_STATE_DOWN)
SetCapture(w32->window);
else
ReleaseCapture();
}
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)
DispatchMessageW(&msg);
// Even if the message loop somehow exits, we still have to respond to
// external requests until termination is requested.
while (!w32->terminate)
mp_dispatch_queue_process(w32->dispatch, 1000);
}
struct get_monitor_data {
int i;
int target;
HMONITOR mon;
};
static BOOL CALLBACK get_monitor_proc(HMONITOR mon, HDC dc, LPRECT r, LPARAM p)
{
struct get_monitor_data *data = (struct get_monitor_data*)p;
if (data->i == data->target) {
data->mon = mon;
return FALSE;
}
data->i++;
return TRUE;
}
static HMONITOR get_monitor(int id)
{
struct get_monitor_data data = { .target = id };
EnumDisplayMonitors(NULL, NULL, get_monitor_proc, (LPARAM)&data);
return data.mon;
}
static void update_screen_rect(struct vo_w32_state *w32)
{
struct mp_vo_opts *opts = w32->opts;
int screen = w32->current_fs ? opts->fsscreen_id : opts->screen_id;
// Handle --fs-screen=all
if (w32->current_fs && screen == -2) {
struct mp_rect rc = {
GetSystemMetrics(SM_XVIRTUALSCREEN),
GetSystemMetrics(SM_YVIRTUALSCREEN),
GetSystemMetrics(SM_CXVIRTUALSCREEN),
GetSystemMetrics(SM_CYVIRTUALSCREEN),
};
rc.x1 += rc.x0;
rc.y1 += rc.y0;
w32->screenrc = rc;
return;
}
// When not using --fs-screen=all, mpv belongs to a specific HMONITOR
HMONITOR mon;
if (screen == -1) {
// Handle --fs-screen=current and --screen=default
mon = MonitorFromWindow(w32->window, MONITOR_DEFAULTTOPRIMARY);
} else {
mon = get_monitor(screen);
if (!mon) {
MP_INFO(w32, "Screen %d does not exist, falling back to primary\n",
screen);
mon = MonitorFromPoint((POINT){0, 0}, MONITOR_DEFAULTTOPRIMARY);
}
}
MONITORINFO mi = { .cbSize = sizeof(mi) };
GetMonitorInfoW(mon, &mi);
w32->screenrc = (struct mp_rect){
mi.rcMonitor.left, mi.rcMonitor.top,
mi.rcMonitor.right, mi.rcMonitor.bottom,
};
}
static DWORD update_style(struct vo_w32_state *w32, DWORD style)
{
const DWORD NO_FRAME = WS_OVERLAPPED | WS_MINIMIZEBOX;
const DWORD FRAME = WS_OVERLAPPEDWINDOW;
const DWORD FULLSCREEN = NO_FRAME | WS_SYSMENU;
style &= ~(NO_FRAME | FRAME | FULLSCREEN);
if (w32->current_fs) {
style |= FULLSCREEN;
} else {
style |= w32->opts->border ? FRAME : NO_FRAME;
}
return style;
}
// Update the window title, position, size, and border style.
static void reinit_window_state(struct vo_w32_state *w32)
{
HWND layer = HWND_NOTOPMOST;
RECT r;
if (w32->parent)
return;
bool new_fs = w32->opts->fullscreen;
bool toggle_fs = w32->current_fs != new_fs;
w32->current_fs = new_fs;
if (w32->taskbar_list) {
ITaskbarList2_MarkFullscreenWindow(w32->taskbar_list,
w32->window, w32->current_fs);
}
DWORD style = update_style(w32, GetWindowLongPtrW(w32->window, GWL_STYLE));
if (w32->opts->ontop)
layer = HWND_TOPMOST;
// xxx not sure if this can trigger any unwanted messages (WM_MOVE/WM_SIZE)
update_screen_rect(w32);
int screen_w = w32->screenrc.x1 - w32->screenrc.x0;
int screen_h = w32->screenrc.y1 - w32->screenrc.y0;
if (w32->current_fs) {
// Save window position and size when switching to fullscreen.
if (toggle_fs) {
w32->prev_width = w32->dw;
w32->prev_height = w32->dh;
w32->prev_x = w32->window_x;
w32->prev_y = w32->window_y;
MP_VERBOSE(w32, "save window bounds: %d:%d:%d:%d\n",
w32->prev_x, w32->prev_y, w32->prev_width, w32->prev_height);
}
w32->window_x = w32->screenrc.x0;
w32->window_y = w32->screenrc.y0;
w32->dw = screen_w;
w32->dh = screen_h;
} else {
if (toggle_fs) {
// Restore window position and size when switching from fullscreen.
MP_VERBOSE(w32, "restore window bounds: %d:%d:%d:%d\n",
w32->prev_x, w32->prev_y, w32->prev_width, w32->prev_height);
w32->dw = w32->prev_width;
w32->dh = w32->prev_height;
w32->window_x = w32->prev_x;
w32->window_y = w32->prev_y;
}
}
r.left = w32->window_x;
r.right = r.left + w32->dw;
r.top = w32->window_y;
r.bottom = r.top + w32->dh;
SetWindowLongPtrW(w32->window, GWL_STYLE, style);
RECT cr = r;
add_window_borders(w32->window, &r);
// Check on client area size instead of window size on --fit-border=no
long o_w;
long o_h;
if( w32->opts->fit_border ) {
o_w = r.right - r.left;
o_h = r.bottom - r.top;
} else {
o_w = cr.right - cr.left;
o_h = cr.bottom - cr.top;
}
if ( !w32->current_fs && ( o_w > screen_w || o_h > screen_h ) )
{
MP_VERBOSE(w32, "requested window size larger than the screen\n");
// Use the aspect of the client area, not the full window size.
// Basically, try to compute the maximum window size.
long n_w;
long n_h;
if( w32->opts->fit_border ) {
n_w = screen_w - (r.right - cr.right) - (cr.left - r.left);
n_h = screen_h - (r.bottom - cr.bottom) - (cr.top - r.top);
} else {
n_w = screen_w;
n_h = screen_h;
}
// Letterbox
double asp = (cr.right - cr.left) / (double)(cr.bottom - cr.top);
double s_asp = n_w / (double)n_h;
if (asp > s_asp) {
n_h = n_w / asp;
} else {
n_w = n_h * asp;
}
// Save new size
w32->dw = n_w;
w32->dh = n_h;
// Get old window center
long o_cx = r.left + (r.right - r.left) / 2;
long o_cy = r.top + (r.bottom - r.top) / 2;
// Add window borders to the new window size
r = (RECT){.right = n_w, .bottom = n_h};
add_window_borders(w32->window, &r);
// Get top and left border size for client area position calculation
long b_top = -r.top;
long b_left = -r.left;
// Center the final window around the old window center
n_w = r.right - r.left;
n_h = r.bottom - r.top;
r.left = o_cx - n_w / 2;
r.top = o_cy - n_h / 2;
r.right = r.left + n_w;
r.bottom = r.top + n_h;
// Save new client area position
w32->window_x = r.left + b_left;
w32->window_y = r.top + b_top;
}
MP_VERBOSE(w32, "reset window bounds: %d:%d:%d:%d\n",
(int) r.left, (int) r.top, (int)(r.right - r.left),
(int)(r.bottom - r.top));
SetWindowPos(w32->window, layer, r.left, r.top, r.right - r.left,
r.bottom - r.top, SWP_FRAMECHANGED | SWP_SHOWWINDOW);
signal_events(w32, VO_EVENT_RESIZE);
}
static void gui_thread_reconfig(void *ptr)
{
struct vo_w32_state *w32 = ptr;
struct vo *vo = w32->vo;
struct vo_win_geometry geo;
vo_calc_window_geometry(vo, &w32->screenrc, &geo);
vo_apply_window_geometry(vo, &geo);
bool reset_size = w32->o_dwidth != vo->dwidth || w32->o_dheight != vo->dheight;
bool pos_init = false;
w32->o_dwidth = vo->dwidth;
w32->o_dheight = vo->dheight;
// the desired size is ignored in wid mode, it always matches the window size.
if (!w32->parent) {
if (w32->window_bounds_initialized) {
// restore vo_dwidth/vo_dheight, which are reset against our will
// in vo_config()
RECT r;
GetClientRect(w32->window, &r);
vo->dwidth = r.right;
vo->dheight = r.bottom;
} else {
w32->window_bounds_initialized = true;
reset_size = true;
pos_init = true;
w32->window_x = w32->prev_x = geo.win.x0;
w32->window_y = w32->prev_y = geo.win.y0;
}
if (reset_size) {
w32->prev_width = vo->dwidth = w32->o_dwidth;
w32->prev_height = vo->dheight = w32->o_dheight;
}
} else {
RECT r;
GetClientRect(w32->window, &r);
vo->dwidth = r.right;
vo->dheight = r.bottom;
}
// Recenter window around old position on new video size
// excluding the case when initial position handled by win_state.
if (!pos_init) {
w32->window_x += w32->dw / 2 - vo->dwidth / 2;
w32->window_y += w32->dh / 2 - vo->dheight / 2;
}
w32->dw = vo->dwidth;
w32->dh = vo->dheight;
reinit_window_state(w32);
}
// Resize the window. On the first call, it's also made visible.
void vo_w32_config(struct vo *vo)
{
struct vo_w32_state *w32 = vo->w32;
mp_dispatch_run(w32->dispatch, gui_thread_reconfig, w32);
}
static void thread_disable_ime(void)
{
// Disables the IME for windows on this thread. imm32.dll must be loaded
// dynamically to account for machines without East Asian language support.
HMODULE imm32 = LoadLibraryW(L"imm32.dll");
if (!imm32)
return;
BOOL (WINAPI *pImmDisableIME)(DWORD) = (BOOL (WINAPI*)(DWORD))
GetProcAddress(imm32, "ImmDisableIME");
if (pImmDisableIME)
pImmDisableIME(0);
FreeLibrary(imm32);
}
static void w32_api_load(struct vo_w32_state *w32)
{
HMODULE shcore_dll = LoadLibraryW(L"shcore.dll");
w32->api.pGetDpiForMonitor = !shcore_dll ? NULL :
(void *)GetProcAddress(shcore_dll, "GetDpiForMonitor");
}
static void *gui_thread(void *ptr)
{
struct vo_w32_state *w32 = ptr;
bool ole_ok = false;
int res = 0;
mpthread_set_name("win32 window");
w32_api_load(w32);
thread_disable_ime();
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,
(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, (LPWSTR)MAKEINTATOM(cls), L"mpv",
update_style(w32, 0),
CW_USEDEFAULT, SW_HIDE, 100, 100,
0, 0, HINST_THISCOMPONENT, NULL);
}
if (!w32->window) {
MP_ERR(w32, "unable to create window!\n");
goto done;
}
if (SUCCEEDED(OleInitialize(NULL))) {
ole_ok = true;
fmtetc_url.cfFormat = (CLIPFORMAT)RegisterClipboardFormat(TEXT("UniformResourceLocatorW"));
DropTarget* dropTarget = talloc(NULL, DropTarget);
DropTarget_Init(dropTarget, w32);
RegisterDragDrop(w32->window, &dropTarget->iface);
// ITaskbarList2 has the MarkFullscreenWindow method, which is used to
// make sure the taskbar is hidden when mpv goes fullscreen
if (SUCCEEDED(CoCreateInstance(&CLSID_TaskbarList, NULL,
CLSCTX_INPROC_SERVER, &IID_ITaskbarList2,
(void**)&w32->taskbar_list)))
{
if (FAILED(ITaskbarList2_HrInit(w32->taskbar_list))) {
ITaskbarList2_Release(w32->taskbar_list);
w32->taskbar_list = NULL;
}
}
// ITaskbarList3 has methods for status indication on taskbar buttons,
// however that interface is only available on Win7/2008 R2 or newer
if (SUCCEEDED(CoCreateInstance(&CLSID_TaskbarList, NULL,
CLSCTX_INPROC_SERVER, &IID_ITaskbarList3,
(void**)&w32->taskbar_list3)))
{
if (FAILED(ITaskbarList3_HrInit(w32->taskbar_list3))) {
ITaskbarList3_Release(w32->taskbar_list3);
w32->taskbar_list3 = NULL;
} else {
w32->tbtnCreatedMsg = RegisterWindowMessage(L"TaskbarButtonCreated");
}
}
} else {
MP_ERR(w32, "Failed to initialize OLE/COM\n");
}
w32->tracking = FALSE;
w32->trackEvent = (TRACKMOUSEEVENT){
.cbSize = sizeof(TRACKMOUSEEVENT),
.dwFlags = TME_LEAVE,
.hwndTrack = w32->window,
};
if (w32->parent)
EnableWindow(w32->window, 0);
w32->cursor_visible = true;
update_screen_rect(w32);
mp_dispatch_set_wakeup_fn(w32->dispatch, wakeup_gui_thread, w32);
res = 1;
done:
mp_rendezvous(w32, res); // init barrier
// This blocks until the GUI thread is to be exited.
if (res)
run_message_loop(w32);
MP_VERBOSE(w32, "uninit\n");
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)
ITaskbarList3_Release(w32->taskbar_list3);
if (ole_ok)
OleUninitialize();
SetThreadExecutionState(ES_CONTINUOUS);
w32_thread_context = NULL;
return NULL;
}
// Returns: 1 = Success, 0 = Failure
int vo_w32_init(struct vo *vo)
{
assert(!vo->w32);
struct vo_w32_state *w32 = talloc_ptrtype(vo, w32);
*w32 = (struct vo_w32_state){
.log = mp_log_new(w32, vo->log, "win32"),
.vo = vo,
.opts = vo->opts,
.input_ctx = vo->input_ctx,
.dispatch = mp_dispatch_create(w32),
};
vo->w32 = w32;
if (pthread_create(&w32->thread, NULL, gui_thread, w32))
goto fail;
if (!mp_rendezvous(w32, 0)) { // init barrier
pthread_join(w32->thread, NULL);
goto fail;
}
// While the UI runs in its own thread, the thread in which this function
// runs in will be the renderer thread. Apply magic MMCSS cargo-cult,
// which might stop Windows from throttling clock rate and so on.
if (vo->opts->mmcss_profile[0]) {
wchar_t *profile = mp_from_utf8(NULL, vo->opts->mmcss_profile);
w32->avrt_handle = AvSetMmThreadCharacteristicsW(profile, &(DWORD){0});
talloc_free(profile);
}
return 1;
fail:
talloc_free(w32);
vo->w32 = NULL;
return 0;
}
struct disp_names_data {
HMONITOR assoc;
int count;
char **names;
};
static BOOL CALLBACK disp_names_proc(HMONITOR mon, HDC dc, LPRECT r, LPARAM p)
{
struct disp_names_data *data = (struct disp_names_data*)p;
// get_disp_names() adds data->assoc to the list, so skip it here
if (mon == data->assoc)
return TRUE;
MONITORINFOEXW mi = { .cbSize = sizeof mi };
if (GetMonitorInfoW(mon, (MONITORINFO*)&mi)) {
MP_TARRAY_APPEND(NULL, data->names, data->count,
mp_to_utf8(NULL, mi.szDevice));
}
return TRUE;
}
static char **get_disp_names(struct vo_w32_state *w32)
{
// Get the client area of the window in screen space
RECT rect = { 0 };
GetClientRect(w32->window, &rect);
MapWindowPoints(w32->window, NULL, (POINT*)&rect, 2);
struct disp_names_data data = { .assoc = w32->monitor };
// Make sure the monitor that Windows considers to be associated with the
// window is first in the list
MONITORINFOEXW mi = { .cbSize = sizeof mi };
if (GetMonitorInfoW(data.assoc, (MONITORINFO*)&mi)) {
MP_TARRAY_APPEND(NULL, data.names, data.count,
mp_to_utf8(NULL, mi.szDevice));
}
// Get the names of the other monitors that intersect the client rect
EnumDisplayMonitors(NULL, &rect, disp_names_proc, (LPARAM)&data);
MP_TARRAY_APPEND(NULL, data.names, data.count, NULL);
return data.names;
}
static int gui_thread_control(struct vo_w32_state *w32, int request, void *arg)
{
switch (request) {
case VOCTRL_FULLSCREEN:
if (w32->opts->fullscreen != w32->current_fs)
reinit_window_state(w32);
return VO_TRUE;
case VOCTRL_ONTOP:
reinit_window_state(w32);
return VO_TRUE;
case VOCTRL_BORDER:
reinit_window_state(w32);
return VO_TRUE;
case VOCTRL_GET_UNFS_WINDOW_SIZE: {
int *s = arg;
if (!w32->window_bounds_initialized)
return VO_FALSE;
s[0] = w32->current_fs ? w32->prev_width : w32->dw;
s[1] = w32->current_fs ? w32->prev_height : w32->dh;
return VO_TRUE;
}
case VOCTRL_SET_UNFS_WINDOW_SIZE: {
int *s = arg;
if (!w32->window_bounds_initialized)
return VO_FALSE;
if (w32->current_fs) {
w32->prev_x += w32->prev_width / 2 - s[0] / 2;
w32->prev_y += w32->prev_height / 2 - s[1] / 2;
w32->prev_width = s[0];
w32->prev_height = s[1];
} else {
w32->window_x += w32->dw / 2 - s[0] / 2;
w32->window_y += w32->dh / 2 - s[1] / 2;
w32->dw = s[0];
w32->dh = s[1];
}
reinit_window_state(w32);
return VO_TRUE;
}
case VOCTRL_GET_WIN_STATE:
*(int *)arg = IsIconic(w32->window) ? VO_WIN_STATE_MINIMIZED : 0;
return VO_TRUE;
case VOCTRL_SET_CURSOR_VISIBILITY:
w32->cursor_visible = *(bool *)arg;
if (w32->can_set_cursor && w32->tracking) {
if (w32->cursor_visible)
SetCursor(LoadCursor(NULL, IDC_ARROW));
else
SetCursor(NULL);
}
return VO_TRUE;
case VOCTRL_KILL_SCREENSAVER:
w32->disable_screensaver = true;
SetThreadExecutionState(ES_CONTINUOUS | ES_SYSTEM_REQUIRED |
ES_DISPLAY_REQUIRED);
return VO_TRUE;
case VOCTRL_RESTORE_SCREENSAVER:
w32->disable_screensaver = false;
SetThreadExecutionState(ES_CONTINUOUS);
return VO_TRUE;
case VOCTRL_UPDATE_WINDOW_TITLE: {
wchar_t *title = mp_from_utf8(NULL, (char *)arg);
SetWindowTextW(w32->window, title);
talloc_free(title);
return VO_TRUE;
}
case VOCTRL_UPDATE_PLAYBACK_STATE: {
w32->current_pstate = *(struct voctrl_playback_state *)arg;
update_playback_state(w32);
return VO_TRUE;
}
case VOCTRL_GET_DISPLAY_FPS:
update_display_info(w32);
*(double*) arg = w32->display_fps;
return VO_TRUE;
case VOCTRL_GET_DISPLAY_NAMES:
*(char ***)arg = get_disp_names(w32);
return VO_TRUE;
case VOCTRL_GET_ICC_PROFILE:
update_display_info(w32);
if (w32->color_profile) {
bstr *p = arg;
*p = stream_read_file(w32->color_profile, NULL,
w32->vo->global, 100000000); // 100 MB
return p->len ? VO_TRUE : VO_FALSE;
}
return VO_FALSE;
}
return VO_NOTIMPL;
}
static void do_control(void *ptr)
{
void **p = ptr;
struct vo_w32_state *w32 = p[0];
int *events = p[1];
int request = *(int *)p[2];
void *arg = p[3];
int *ret = p[4];
*ret = gui_thread_control(w32, request, arg);
*events |= atomic_fetch_and(&w32->event_flags, 0);
// Safe access, since caller (owner of vo) is blocked.
if (*events & VO_EVENT_RESIZE) {
w32->vo->dwidth = w32->dw;
w32->vo->dheight = w32->dh;
}
}
int vo_w32_control(struct vo *vo, int *events, int request, void *arg)
{
struct vo_w32_state *w32 = vo->w32;
if (request == VOCTRL_CHECK_EVENTS) {
*events |= atomic_fetch_and(&w32->event_flags, 0);
if (*events & VO_EVENT_RESIZE) {
mp_dispatch_lock(w32->dispatch);
vo->dwidth = w32->dw;
vo->dheight = w32->dh;
mp_dispatch_unlock(w32->dispatch);
}
return VO_TRUE;
} else {
int r;
void *p[] = {w32, events, &request, arg, &r};
mp_dispatch_run(w32->dispatch, do_control, p);
return r;
}
}
static void do_terminate(void *ptr)
{
struct vo_w32_state *w32 = ptr;
w32->terminate = true;
if (!w32->destroyed)
DestroyWindow(w32->window);
mp_dispatch_interrupt(w32->dispatch);
}
void vo_w32_uninit(struct vo *vo)
{
struct vo_w32_state *w32 = vo->w32;
if (!w32)
return;
mp_dispatch_run(w32->dispatch, do_terminate, w32);
pthread_join(w32->thread, NULL);
AvRevertMmThreadCharacteristics(w32->avrt_handle);
talloc_free(w32);
vo->w32 = NULL;
}
HWND vo_w32_hwnd(struct vo *vo)
{
struct vo_w32_state *w32 = vo->w32;
return w32->window; // immutable, so no synchronization needed
}
void vo_w32_run_on_thread(struct vo *vo, void (*cb)(void *ctx), void *ctx)
{
struct vo_w32_state *w32 = vo->w32;
mp_dispatch_run(w32->dispatch, cb, ctx);
}
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