1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22
23 #if SDL_VIDEO_DRIVER_WINDOWS
24
25 #include "SDL_windowsvideo.h"
26 #include "SDL_windowsshape.h"
27 #include "SDL_system.h"
28 #include "SDL_syswm.h"
29 #include "SDL_timer.h"
30 #include "SDL_vkeys.h"
31 #include "SDL_hints.h"
32 #include "../../events/SDL_events_c.h"
33 #include "../../events/SDL_touch_c.h"
34 #include "../../events/scancodes_windows.h"
35 #include "SDL_hints.h"
36
37 /* Dropfile support */
38 #include <shellapi.h>
39
40 /* For GET_X_LPARAM, GET_Y_LPARAM. */
41 #include <windowsx.h>
42
43 /* #define WMMSG_DEBUG */
44 #ifdef WMMSG_DEBUG
45 #include <stdio.h>
46 #include "wmmsg.h"
47 #endif
48
49 /* Masks for processing the windows KEYDOWN and KEYUP messages */
50 #define REPEATED_KEYMASK (1<<30)
51 #define EXTENDED_KEYMASK (1<<24)
52
53 #define VK_ENTER 10 /* Keypad Enter ... no VKEY defined? */
54 #ifndef VK_OEM_NEC_EQUAL
55 #define VK_OEM_NEC_EQUAL 0x92
56 #endif
57
58 /* Make sure XBUTTON stuff is defined that isn't in older Platform SDKs... */
59 #ifndef WM_XBUTTONDOWN
60 #define WM_XBUTTONDOWN 0x020B
61 #endif
62 #ifndef WM_XBUTTONUP
63 #define WM_XBUTTONUP 0x020C
64 #endif
65 #ifndef GET_XBUTTON_WPARAM
66 #define GET_XBUTTON_WPARAM(w) (HIWORD(w))
67 #endif
68 #ifndef WM_INPUT
69 #define WM_INPUT 0x00ff
70 #endif
71 #ifndef WM_TOUCH
72 #define WM_TOUCH 0x0240
73 #endif
74 #ifndef WM_MOUSEHWHEEL
75 #define WM_MOUSEHWHEEL 0x020E
76 #endif
77 #ifndef WM_POINTERUPDATE
78 #define WM_POINTERUPDATE 0x0245
79 #endif
80 #ifndef WM_UNICHAR
81 #define WM_UNICHAR 0x0109
82 #endif
83
84 #ifndef IS_HIGH_SURROGATE
85 #define IS_HIGH_SURROGATE(x) (((x) >= 0xd800) && ((x) <= 0xdbff))
86 #endif
87 #ifndef IS_LOW_SURROGATE
88 #define IS_LOW_SURROGATE(x) (((x) >= 0xdc00) && ((x) <= 0xdfff))
89 #endif
90 #ifndef IS_SURROGATE_PAIR
91 #define IS_SURROGATE_PAIR(h,l) (IS_HIGH_SURROGATE(h) && IS_LOW_SURROGATE(l))
92 #endif
93
94 static SDL_Scancode
VKeytoScancodeFallback(WPARAM vkey)95 VKeytoScancodeFallback(WPARAM vkey)
96 {
97 switch (vkey) {
98 case VK_LEFT: return SDL_SCANCODE_LEFT;
99 case VK_UP: return SDL_SCANCODE_UP;
100 case VK_RIGHT: return SDL_SCANCODE_RIGHT;
101 case VK_DOWN: return SDL_SCANCODE_DOWN;
102
103 default: return SDL_SCANCODE_UNKNOWN;
104 }
105 }
106
107 static SDL_Scancode
VKeytoScancode(WPARAM vkey)108 VKeytoScancode(WPARAM vkey)
109 {
110 switch (vkey) {
111 case VK_MODECHANGE: return SDL_SCANCODE_MODE;
112 case VK_SELECT: return SDL_SCANCODE_SELECT;
113 case VK_EXECUTE: return SDL_SCANCODE_EXECUTE;
114 case VK_HELP: return SDL_SCANCODE_HELP;
115 case VK_PAUSE: return SDL_SCANCODE_PAUSE;
116 case VK_NUMLOCK: return SDL_SCANCODE_NUMLOCKCLEAR;
117
118 case VK_F13: return SDL_SCANCODE_F13;
119 case VK_F14: return SDL_SCANCODE_F14;
120 case VK_F15: return SDL_SCANCODE_F15;
121 case VK_F16: return SDL_SCANCODE_F16;
122 case VK_F17: return SDL_SCANCODE_F17;
123 case VK_F18: return SDL_SCANCODE_F18;
124 case VK_F19: return SDL_SCANCODE_F19;
125 case VK_F20: return SDL_SCANCODE_F20;
126 case VK_F21: return SDL_SCANCODE_F21;
127 case VK_F22: return SDL_SCANCODE_F22;
128 case VK_F23: return SDL_SCANCODE_F23;
129 case VK_F24: return SDL_SCANCODE_F24;
130
131 case VK_OEM_NEC_EQUAL: return SDL_SCANCODE_KP_EQUALS;
132 case VK_BROWSER_BACK: return SDL_SCANCODE_AC_BACK;
133 case VK_BROWSER_FORWARD: return SDL_SCANCODE_AC_FORWARD;
134 case VK_BROWSER_REFRESH: return SDL_SCANCODE_AC_REFRESH;
135 case VK_BROWSER_STOP: return SDL_SCANCODE_AC_STOP;
136 case VK_BROWSER_SEARCH: return SDL_SCANCODE_AC_SEARCH;
137 case VK_BROWSER_FAVORITES: return SDL_SCANCODE_AC_BOOKMARKS;
138 case VK_BROWSER_HOME: return SDL_SCANCODE_AC_HOME;
139 case VK_VOLUME_MUTE: return SDL_SCANCODE_AUDIOMUTE;
140 case VK_VOLUME_DOWN: return SDL_SCANCODE_VOLUMEDOWN;
141 case VK_VOLUME_UP: return SDL_SCANCODE_VOLUMEUP;
142
143 case VK_MEDIA_NEXT_TRACK: return SDL_SCANCODE_AUDIONEXT;
144 case VK_MEDIA_PREV_TRACK: return SDL_SCANCODE_AUDIOPREV;
145 case VK_MEDIA_STOP: return SDL_SCANCODE_AUDIOSTOP;
146 case VK_MEDIA_PLAY_PAUSE: return SDL_SCANCODE_AUDIOPLAY;
147 case VK_LAUNCH_MAIL: return SDL_SCANCODE_MAIL;
148 case VK_LAUNCH_MEDIA_SELECT: return SDL_SCANCODE_MEDIASELECT;
149
150 case VK_OEM_102: return SDL_SCANCODE_NONUSBACKSLASH;
151
152 case VK_ATTN: return SDL_SCANCODE_SYSREQ;
153 case VK_CRSEL: return SDL_SCANCODE_CRSEL;
154 case VK_EXSEL: return SDL_SCANCODE_EXSEL;
155 case VK_OEM_CLEAR: return SDL_SCANCODE_CLEAR;
156
157 case VK_LAUNCH_APP1: return SDL_SCANCODE_APP1;
158 case VK_LAUNCH_APP2: return SDL_SCANCODE_APP2;
159
160 default: return SDL_SCANCODE_UNKNOWN;
161 }
162 }
163
164 static SDL_Scancode
WindowsScanCodeToSDLScanCode(LPARAM lParam,WPARAM wParam)165 WindowsScanCodeToSDLScanCode(LPARAM lParam, WPARAM wParam)
166 {
167 SDL_Scancode code;
168 int nScanCode = (lParam >> 16) & 0xFF;
169 SDL_bool bIsExtended = (lParam & (1 << 24)) != 0;
170
171 code = VKeytoScancode(wParam);
172
173 if (code == SDL_SCANCODE_UNKNOWN && nScanCode <= 127) {
174 code = windows_scancode_table[nScanCode];
175
176 if (bIsExtended) {
177 switch (code) {
178 case SDL_SCANCODE_RETURN:
179 code = SDL_SCANCODE_KP_ENTER;
180 break;
181 case SDL_SCANCODE_LALT:
182 code = SDL_SCANCODE_RALT;
183 break;
184 case SDL_SCANCODE_LCTRL:
185 code = SDL_SCANCODE_RCTRL;
186 break;
187 case SDL_SCANCODE_SLASH:
188 code = SDL_SCANCODE_KP_DIVIDE;
189 break;
190 case SDL_SCANCODE_CAPSLOCK:
191 code = SDL_SCANCODE_KP_PLUS;
192 break;
193 default:
194 break;
195 }
196 } else {
197 switch (code) {
198 case SDL_SCANCODE_HOME:
199 code = SDL_SCANCODE_KP_7;
200 break;
201 case SDL_SCANCODE_UP:
202 code = SDL_SCANCODE_KP_8;
203 break;
204 case SDL_SCANCODE_PAGEUP:
205 code = SDL_SCANCODE_KP_9;
206 break;
207 case SDL_SCANCODE_LEFT:
208 code = SDL_SCANCODE_KP_4;
209 break;
210 case SDL_SCANCODE_RIGHT:
211 code = SDL_SCANCODE_KP_6;
212 break;
213 case SDL_SCANCODE_END:
214 code = SDL_SCANCODE_KP_1;
215 break;
216 case SDL_SCANCODE_DOWN:
217 code = SDL_SCANCODE_KP_2;
218 break;
219 case SDL_SCANCODE_PAGEDOWN:
220 code = SDL_SCANCODE_KP_3;
221 break;
222 case SDL_SCANCODE_INSERT:
223 code = SDL_SCANCODE_KP_0;
224 break;
225 case SDL_SCANCODE_DELETE:
226 code = SDL_SCANCODE_KP_PERIOD;
227 break;
228 case SDL_SCANCODE_PRINTSCREEN:
229 code = SDL_SCANCODE_KP_MULTIPLY;
230 break;
231 default:
232 break;
233 }
234 }
235 }
236
237 /* The on-screen keyboard can generate VK_LEFT and VK_RIGHT events without a scancode
238 * value set, however we cannot simply map these in VKeytoScancode() or we will be
239 * incorrectly handling the arrow keys on the number pad when NumLock is disabled
240 * (which also generate VK_LEFT, VK_RIGHT, etc in that scenario). Instead, we'll only
241 * map them if none of the above special number pad mappings applied. */
242 if (code == SDL_SCANCODE_UNKNOWN) {
243 code = VKeytoScancodeFallback(wParam);
244 }
245
246 return code;
247 }
248
249 static SDL_bool
WIN_ShouldIgnoreFocusClick()250 WIN_ShouldIgnoreFocusClick()
251 {
252 return !SDL_GetHintBoolean(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, SDL_FALSE);
253 }
254
255 static void
WIN_CheckWParamMouseButton(SDL_bool bwParamMousePressed,Uint32 mouseFlags,SDL_bool bSwapButtons,SDL_WindowData * data,Uint8 button,SDL_MouseID mouseID)256 WIN_CheckWParamMouseButton(SDL_bool bwParamMousePressed, Uint32 mouseFlags, SDL_bool bSwapButtons, SDL_WindowData *data, Uint8 button, SDL_MouseID mouseID)
257 {
258 if (bSwapButtons) {
259 if (button == SDL_BUTTON_LEFT) {
260 button = SDL_BUTTON_RIGHT;
261 }
262 else if (button == SDL_BUTTON_RIGHT) {
263 button = SDL_BUTTON_LEFT;
264 }
265 }
266
267 if (data->focus_click_pending & SDL_BUTTON(button)) {
268 /* Ignore the button click for activation */
269 if (!bwParamMousePressed) {
270 data->focus_click_pending &= ~SDL_BUTTON(button);
271 WIN_UpdateClipCursor(data->window);
272 }
273 if (WIN_ShouldIgnoreFocusClick()) {
274 return;
275 }
276 }
277
278 if (bwParamMousePressed && !(mouseFlags & SDL_BUTTON(button))) {
279 SDL_SendMouseButton(data->window, mouseID, SDL_PRESSED, button);
280 } else if (!bwParamMousePressed && (mouseFlags & SDL_BUTTON(button))) {
281 SDL_SendMouseButton(data->window, mouseID, SDL_RELEASED, button);
282 }
283 }
284
285 /*
286 * Some windows systems fail to send a WM_LBUTTONDOWN sometimes, but each mouse move contains the current button state also
287 * so this function reconciles our view of the world with the current buttons reported by windows
288 */
289 static void
WIN_CheckWParamMouseButtons(WPARAM wParam,SDL_WindowData * data,SDL_MouseID mouseID)290 WIN_CheckWParamMouseButtons(WPARAM wParam, SDL_WindowData *data, SDL_MouseID mouseID)
291 {
292 if (wParam != data->mouse_button_flags) {
293 Uint32 mouseFlags = SDL_GetMouseState(NULL, NULL);
294
295 /* WM_LBUTTONDOWN and friends handle button swapping for us. No need to check SM_SWAPBUTTON here. */
296 WIN_CheckWParamMouseButton((wParam & MK_LBUTTON), mouseFlags, SDL_FALSE, data, SDL_BUTTON_LEFT, mouseID);
297 WIN_CheckWParamMouseButton((wParam & MK_MBUTTON), mouseFlags, SDL_FALSE, data, SDL_BUTTON_MIDDLE, mouseID);
298 WIN_CheckWParamMouseButton((wParam & MK_RBUTTON), mouseFlags, SDL_FALSE, data, SDL_BUTTON_RIGHT, mouseID);
299 WIN_CheckWParamMouseButton((wParam & MK_XBUTTON1), mouseFlags, SDL_FALSE, data, SDL_BUTTON_X1, mouseID);
300 WIN_CheckWParamMouseButton((wParam & MK_XBUTTON2), mouseFlags, SDL_FALSE, data, SDL_BUTTON_X2, mouseID);
301
302 data->mouse_button_flags = wParam;
303 }
304 }
305
306 static void
WIN_CheckRawMouseButtons(ULONG rawButtons,SDL_WindowData * data,SDL_MouseID mouseID)307 WIN_CheckRawMouseButtons(ULONG rawButtons, SDL_WindowData *data, SDL_MouseID mouseID)
308 {
309 if (rawButtons != data->mouse_button_flags) {
310 Uint32 mouseFlags = SDL_GetMouseState(NULL, NULL);
311 SDL_bool swapButtons = GetSystemMetrics(SM_SWAPBUTTON) != 0;
312 if ((rawButtons & RI_MOUSE_BUTTON_1_DOWN))
313 WIN_CheckWParamMouseButton((rawButtons & RI_MOUSE_BUTTON_1_DOWN), mouseFlags, swapButtons, data, SDL_BUTTON_LEFT, mouseID);
314 if ((rawButtons & RI_MOUSE_BUTTON_1_UP))
315 WIN_CheckWParamMouseButton(!(rawButtons & RI_MOUSE_BUTTON_1_UP), mouseFlags, swapButtons, data, SDL_BUTTON_LEFT, mouseID);
316 if ((rawButtons & RI_MOUSE_BUTTON_2_DOWN))
317 WIN_CheckWParamMouseButton((rawButtons & RI_MOUSE_BUTTON_2_DOWN), mouseFlags, swapButtons, data, SDL_BUTTON_RIGHT, mouseID);
318 if ((rawButtons & RI_MOUSE_BUTTON_2_UP))
319 WIN_CheckWParamMouseButton(!(rawButtons & RI_MOUSE_BUTTON_2_UP), mouseFlags, swapButtons, data, SDL_BUTTON_RIGHT, mouseID);
320 if ((rawButtons & RI_MOUSE_BUTTON_3_DOWN))
321 WIN_CheckWParamMouseButton((rawButtons & RI_MOUSE_BUTTON_3_DOWN), mouseFlags, swapButtons, data, SDL_BUTTON_MIDDLE, mouseID);
322 if ((rawButtons & RI_MOUSE_BUTTON_3_UP))
323 WIN_CheckWParamMouseButton(!(rawButtons & RI_MOUSE_BUTTON_3_UP), mouseFlags, swapButtons, data, SDL_BUTTON_MIDDLE, mouseID);
324 if ((rawButtons & RI_MOUSE_BUTTON_4_DOWN))
325 WIN_CheckWParamMouseButton((rawButtons & RI_MOUSE_BUTTON_4_DOWN), mouseFlags, swapButtons, data, SDL_BUTTON_X1, mouseID);
326 if ((rawButtons & RI_MOUSE_BUTTON_4_UP))
327 WIN_CheckWParamMouseButton(!(rawButtons & RI_MOUSE_BUTTON_4_UP), mouseFlags, swapButtons, data, SDL_BUTTON_X1, mouseID);
328 if ((rawButtons & RI_MOUSE_BUTTON_5_DOWN))
329 WIN_CheckWParamMouseButton((rawButtons & RI_MOUSE_BUTTON_5_DOWN), mouseFlags, swapButtons, data, SDL_BUTTON_X2, mouseID);
330 if ((rawButtons & RI_MOUSE_BUTTON_5_UP))
331 WIN_CheckWParamMouseButton(!(rawButtons & RI_MOUSE_BUTTON_5_UP), mouseFlags, swapButtons, data, SDL_BUTTON_X2, mouseID);
332 data->mouse_button_flags = rawButtons;
333 }
334 }
335
336 static void
WIN_CheckAsyncMouseRelease(SDL_WindowData * data)337 WIN_CheckAsyncMouseRelease(SDL_WindowData *data)
338 {
339 Uint32 mouseFlags;
340 SHORT keyState;
341 SDL_bool swapButtons;
342
343 /* mouse buttons may have changed state here, we need to resync them,
344 but we will get a WM_MOUSEMOVE right away which will fix things up if in non raw mode also
345 */
346 mouseFlags = SDL_GetMouseState(NULL, NULL);
347 swapButtons = GetSystemMetrics(SM_SWAPBUTTON) != 0;
348
349 keyState = GetAsyncKeyState(VK_LBUTTON);
350 if (!(keyState & 0x8000)) {
351 WIN_CheckWParamMouseButton(SDL_FALSE, mouseFlags, swapButtons, data, SDL_BUTTON_LEFT, 0);
352 }
353 keyState = GetAsyncKeyState(VK_RBUTTON);
354 if (!(keyState & 0x8000)) {
355 WIN_CheckWParamMouseButton(SDL_FALSE, mouseFlags, swapButtons, data, SDL_BUTTON_RIGHT, 0);
356 }
357 keyState = GetAsyncKeyState(VK_MBUTTON);
358 if (!(keyState & 0x8000)) {
359 WIN_CheckWParamMouseButton(SDL_FALSE, mouseFlags, swapButtons, data, SDL_BUTTON_MIDDLE, 0);
360 }
361 keyState = GetAsyncKeyState(VK_XBUTTON1);
362 if (!(keyState & 0x8000)) {
363 WIN_CheckWParamMouseButton(SDL_FALSE, mouseFlags, swapButtons, data, SDL_BUTTON_X1, 0);
364 }
365 keyState = GetAsyncKeyState(VK_XBUTTON2);
366 if (!(keyState & 0x8000)) {
367 WIN_CheckWParamMouseButton(SDL_FALSE, mouseFlags, swapButtons, data, SDL_BUTTON_X2, 0);
368 }
369 data->mouse_button_flags = 0;
370 }
371
372 static void
WIN_UpdateFocus(SDL_Window * window)373 WIN_UpdateFocus(SDL_Window *window)
374 {
375 SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
376 HWND hwnd = data->hwnd;
377 SDL_bool had_focus = (SDL_GetKeyboardFocus() == window) ? SDL_TRUE : SDL_FALSE;
378 SDL_bool has_focus = (GetForegroundWindow() == hwnd) ? SDL_TRUE : SDL_FALSE;
379
380 if (had_focus == has_focus) {
381 return;
382 }
383
384 if (has_focus) {
385 POINT cursorPos;
386
387 SDL_bool swapButtons = GetSystemMetrics(SM_SWAPBUTTON) != 0;
388 if (GetAsyncKeyState(VK_LBUTTON)) {
389 data->focus_click_pending |= !swapButtons ? SDL_BUTTON_LMASK : SDL_BUTTON_RMASK;
390 }
391 if (GetAsyncKeyState(VK_RBUTTON)) {
392 data->focus_click_pending |= !swapButtons ? SDL_BUTTON_RMASK : SDL_BUTTON_LMASK;
393 }
394 if (GetAsyncKeyState(VK_MBUTTON)) {
395 data->focus_click_pending |= SDL_BUTTON_MMASK;
396 }
397 if (GetAsyncKeyState(VK_XBUTTON1)) {
398 data->focus_click_pending |= SDL_BUTTON_X1MASK;
399 }
400 if (GetAsyncKeyState(VK_XBUTTON2)) {
401 data->focus_click_pending |= SDL_BUTTON_X2MASK;
402 }
403
404 SDL_SetKeyboardFocus(window);
405
406 /* In relative mode we are guaranteed to have mouse focus if we have keyboard focus */
407 if (!SDL_GetMouse()->relative_mode) {
408 GetCursorPos(&cursorPos);
409 ScreenToClient(hwnd, &cursorPos);
410 SDL_SendMouseMotion(window, 0, 0, cursorPos.x, cursorPos.y);
411 }
412
413 WIN_CheckAsyncMouseRelease(data);
414 WIN_UpdateClipCursor(window);
415
416 /*
417 * FIXME: Update keyboard state
418 */
419 WIN_CheckClipboardUpdate(data->videodata);
420
421 SDL_ToggleModState(KMOD_CAPS, (GetKeyState(VK_CAPITAL) & 0x0001) != 0);
422 SDL_ToggleModState(KMOD_NUM, (GetKeyState(VK_NUMLOCK) & 0x0001) != 0);
423 SDL_ToggleModState(KMOD_SCROLL, (GetKeyState(VK_SCROLL) & 0x0001) != 0);
424
425 } else {
426 RECT rect;
427
428 data->in_window_deactivation = SDL_TRUE;
429
430 SDL_SetKeyboardFocus(NULL);
431 WIN_ResetDeadKeys();
432
433 if (GetClipCursor(&rect) && SDL_memcmp(&rect, &data->cursor_clipped_rect, sizeof(rect)) == 0) {
434 ClipCursor(NULL);
435 SDL_zero(data->cursor_clipped_rect);
436 }
437
438 data->in_window_deactivation = SDL_FALSE;
439 }
440 }
441
442 static BOOL
WIN_ConvertUTF32toUTF8(UINT32 codepoint,char * text)443 WIN_ConvertUTF32toUTF8(UINT32 codepoint, char * text)
444 {
445 if (codepoint <= 0x7F) {
446 text[0] = (char) codepoint;
447 text[1] = '\0';
448 } else if (codepoint <= 0x7FF) {
449 text[0] = 0xC0 | (char) ((codepoint >> 6) & 0x1F);
450 text[1] = 0x80 | (char) (codepoint & 0x3F);
451 text[2] = '\0';
452 } else if (codepoint <= 0xFFFF) {
453 text[0] = 0xE0 | (char) ((codepoint >> 12) & 0x0F);
454 text[1] = 0x80 | (char) ((codepoint >> 6) & 0x3F);
455 text[2] = 0x80 | (char) (codepoint & 0x3F);
456 text[3] = '\0';
457 } else if (codepoint <= 0x10FFFF) {
458 text[0] = 0xF0 | (char) ((codepoint >> 18) & 0x0F);
459 text[1] = 0x80 | (char) ((codepoint >> 12) & 0x3F);
460 text[2] = 0x80 | (char) ((codepoint >> 6) & 0x3F);
461 text[3] = 0x80 | (char) (codepoint & 0x3F);
462 text[4] = '\0';
463 } else {
464 return SDL_FALSE;
465 }
466 return SDL_TRUE;
467 }
468
469 static BOOL
WIN_ConvertUTF16toUTF8(UINT32 high_surrogate,UINT32 low_surrogate,char * text)470 WIN_ConvertUTF16toUTF8(UINT32 high_surrogate, UINT32 low_surrogate, char * text)
471 {
472 const UINT32 SURROGATE_OFFSET = 0x10000 - (0xD800 << 10) - 0xDC00;
473 const UINT32 codepoint = (high_surrogate << 10) + low_surrogate + SURROGATE_OFFSET;
474 return WIN_ConvertUTF32toUTF8(codepoint, text);
475 }
476
477 static SDL_bool
ShouldGenerateWindowCloseOnAltF4(void)478 ShouldGenerateWindowCloseOnAltF4(void)
479 {
480 return !SDL_GetHintBoolean(SDL_HINT_WINDOWS_NO_CLOSE_ON_ALT_F4, SDL_FALSE);
481 }
482
483 /* We want to generate mouse events from mouse and pen, and touch events from touchscreens */
484 #define MI_WP_SIGNATURE 0xFF515700
485 #define MI_WP_SIGNATURE_MASK 0xFFFFFF00
486 #define IsTouchEvent(dw) ((dw) & MI_WP_SIGNATURE_MASK) == MI_WP_SIGNATURE
487
488 typedef enum
489 {
490 SDL_MOUSE_EVENT_SOURCE_UNKNOWN,
491 SDL_MOUSE_EVENT_SOURCE_MOUSE,
492 SDL_MOUSE_EVENT_SOURCE_TOUCH,
493 SDL_MOUSE_EVENT_SOURCE_PEN,
494 } SDL_MOUSE_EVENT_SOURCE;
495
GetMouseMessageSource()496 static SDL_MOUSE_EVENT_SOURCE GetMouseMessageSource()
497 {
498 LPARAM extrainfo = GetMessageExtraInfo();
499 /* Mouse data (ignoring synthetic mouse events generated for touchscreens) */
500 /* Versions below Vista will set the low 7 bits to the Mouse ID and don't use bit 7:
501 Check bits 8-32 for the signature (which will indicate a Tablet PC Pen or Touch Device).
502 Only check bit 7 when Vista and up(Cleared=Pen, Set=Touch(which we need to filter out)),
503 when the signature is set. The Mouse ID will be zero for an actual mouse. */
504 if (IsTouchEvent(extrainfo)) {
505 if (extrainfo & 0x80) {
506 return SDL_MOUSE_EVENT_SOURCE_TOUCH;
507 } else {
508 return SDL_MOUSE_EVENT_SOURCE_PEN;
509 }
510 }
511 return SDL_MOUSE_EVENT_SOURCE_MOUSE;
512 }
513
514 static SDL_WindowData *
WIN_GetWindowDataFromHWND(HWND hwnd)515 WIN_GetWindowDataFromHWND(HWND hwnd)
516 {
517 SDL_VideoDevice *_this = SDL_GetVideoDevice();
518 SDL_Window *window;
519
520 if (_this) {
521 for (window = _this->windows; window; window = window->next) {
522 SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
523 if (data && data->hwnd == hwnd) {
524 return data;
525 }
526 }
527 }
528 return NULL;
529 }
530
531 LRESULT CALLBACK
WIN_KeyboardHookProc(int nCode,WPARAM wParam,LPARAM lParam)532 WIN_KeyboardHookProc(int nCode, WPARAM wParam, LPARAM lParam)
533 {
534 KBDLLHOOKSTRUCT* hookData = (KBDLLHOOKSTRUCT*)lParam;
535 SDL_VideoData* data = SDL_GetVideoDevice()->driverdata;
536 SDL_Scancode scanCode;
537
538 if (nCode < 0 || nCode != HC_ACTION) {
539 return CallNextHookEx(NULL, nCode, wParam, lParam);
540 }
541
542 switch (hookData->vkCode) {
543 case VK_LWIN:
544 scanCode = SDL_SCANCODE_LGUI;
545 break;
546 case VK_RWIN:
547 scanCode = SDL_SCANCODE_RGUI;
548 break;
549 case VK_LMENU:
550 scanCode = SDL_SCANCODE_LALT;
551 break;
552 case VK_RMENU:
553 scanCode = SDL_SCANCODE_RALT;
554 break;
555 case VK_LCONTROL:
556 scanCode = SDL_SCANCODE_LCTRL;
557 break;
558 case VK_RCONTROL:
559 scanCode = SDL_SCANCODE_RCTRL;
560 break;
561
562 /* These are required to intercept Alt+Tab and Alt+Esc on Windows 7 */
563 case VK_TAB:
564 scanCode = SDL_SCANCODE_TAB;
565 break;
566 case VK_ESCAPE:
567 scanCode = SDL_SCANCODE_ESCAPE;
568 break;
569
570 default:
571 return CallNextHookEx(NULL, nCode, wParam, lParam);
572 }
573
574 if (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN) {
575 SDL_SendKeyboardKey(SDL_PRESSED, scanCode);
576 } else {
577 SDL_SendKeyboardKey(SDL_RELEASED, scanCode);
578
579 /* If the key was down prior to our hook being installed, allow the
580 key up message to pass normally the first time. This ensures other
581 windows have a consistent view of the key state, and avoids keys
582 being stuck down in those windows if they are down when the grab
583 happens and raised while grabbed. */
584 if (hookData->vkCode <= 0xFF && data->pre_hook_key_state[hookData->vkCode]) {
585 data->pre_hook_key_state[hookData->vkCode] = 0;
586 return CallNextHookEx(NULL, nCode, wParam, lParam);
587 }
588 }
589
590 return 1;
591 }
592
WIN_CheckICMProfileChanged(SDL_Window * window)593 static void WIN_CheckICMProfileChanged(SDL_Window* window)
594 {
595 SDL_VideoDisplay* display = SDL_GetDisplayForWindow(window);
596 SDL_DisplayData* data = (SDL_DisplayData*)display->driverdata;
597 static WCHAR currentIcmFileName[MAX_PATH] = { '\0' };
598 WCHAR icmFileName[MAX_PATH];
599 HDC hdc;
600 SDL_bool succeeded;
601 DWORD fileNameSize = MAX_PATH;
602
603 hdc = CreateDCW(data->DeviceName, NULL, NULL, NULL);
604 if (hdc) {
605 succeeded = GetICMProfileW(hdc, &fileNameSize, icmFileName);
606 DeleteDC(hdc);
607 if (succeeded) {
608
609 if (SDL_wcsncmp(currentIcmFileName, icmFileName, fileNameSize)) {
610 SDL_wcslcpy(currentIcmFileName, icmFileName, fileNameSize);
611 SDL_SendWindowEvent(window, SDL_WINDOWEVENT_ICCPROF_CHANGED, 0, 0);
612 }
613 }
614 }
615 }
616
617 LRESULT CALLBACK
WIN_WindowProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)618 WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
619 {
620 SDL_WindowData *data;
621 LRESULT returnCode = -1;
622
623 /* Send a SDL_SYSWMEVENT if the application wants them */
624 if (SDL_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) {
625 SDL_SysWMmsg wmmsg;
626
627 SDL_VERSION(&wmmsg.version);
628 wmmsg.subsystem = SDL_SYSWM_WINDOWS;
629 wmmsg.msg.win.hwnd = hwnd;
630 wmmsg.msg.win.msg = msg;
631 wmmsg.msg.win.wParam = wParam;
632 wmmsg.msg.win.lParam = lParam;
633 SDL_SendSysWMEvent(&wmmsg);
634 }
635
636 /* Get the window data for the window */
637 data = WIN_GetWindowDataFromHWND(hwnd);
638 if (!data) {
639 /* Fallback */
640 data = (SDL_WindowData *) GetProp(hwnd, TEXT("SDL_WindowData"));
641 }
642 if (!data) {
643 return CallWindowProc(DefWindowProc, hwnd, msg, wParam, lParam);
644 }
645
646 #ifdef WMMSG_DEBUG
647 {
648 char message[1024];
649 if (msg > MAX_WMMSG) {
650 SDL_snprintf(message, sizeof(message), "Received windows message: %p UNKNOWN (%d) -- 0x%X, 0x%X\n", hwnd, msg, wParam, lParam);
651 } else {
652 SDL_snprintf(message, sizeof(message), "Received windows message: %p %s -- 0x%X, 0x%X\n", hwnd, wmtab[msg], wParam, lParam);
653 }
654 OutputDebugStringA(message);
655 }
656 #endif /* WMMSG_DEBUG */
657
658 if (IME_HandleMessage(hwnd, msg, wParam, &lParam, data->videodata))
659 return 0;
660
661 switch (msg) {
662
663 case WM_SHOWWINDOW:
664 {
665 if (wParam) {
666 SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_SHOWN, 0, 0);
667 } else {
668 SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_HIDDEN, 0, 0);
669 }
670 }
671 break;
672
673 case WM_NCACTIVATE:
674 {
675 /* Don't immediately clip the cursor in case we're clicking minimize/maximize buttons */
676 data->skip_update_clipcursor = SDL_TRUE;
677
678 /* Update the focus here, since it's possible to get WM_ACTIVATE and WM_SETFOCUS without
679 actually being the foreground window, but this appears to get called in all cases where
680 the global foreground window changes to and from this window. */
681 WIN_UpdateFocus(data->window);
682 WIN_CheckICMProfileChanged(data->window);
683 }
684 break;
685
686 case WM_ACTIVATE:
687 {
688 /* Update the focus in case we changed focus to a child window and then away from the application */
689 WIN_UpdateFocus(data->window);
690 }
691 break;
692
693 case WM_SETFOCUS:
694 case WM_KILLFOCUS:
695 {
696 /* Update the focus in case it's changing between top-level windows in the same application */
697 WIN_UpdateFocus(data->window);
698 }
699 break;
700
701 case WM_POINTERUPDATE:
702 {
703 data->last_pointer_update = lParam;
704 break;
705 }
706
707 case WM_MOUSEMOVE:
708 {
709 SDL_Mouse *mouse = SDL_GetMouse();
710
711 if (!data->mouse_tracked) {
712 TRACKMOUSEEVENT trackMouseEvent;
713
714 trackMouseEvent.cbSize = sizeof(TRACKMOUSEEVENT);
715 trackMouseEvent.dwFlags = TME_LEAVE;
716 trackMouseEvent.hwndTrack = data->hwnd;
717
718 if (TrackMouseEvent(&trackMouseEvent)) {
719 data->mouse_tracked = SDL_TRUE;
720 }
721 }
722
723 if (!mouse->relative_mode || mouse->relative_mode_warp) {
724 /* Only generate mouse events for real mouse */
725 if (GetMouseMessageSource() != SDL_MOUSE_EVENT_SOURCE_TOUCH &&
726 lParam != data->last_pointer_update) {
727 SDL_SendMouseMotion(data->window, 0, 0, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
728 }
729 }
730 }
731 /* don't break here, fall through to check the wParam like the button presses */
732 SDL_FALLTHROUGH;
733 case WM_LBUTTONUP:
734 case WM_RBUTTONUP:
735 case WM_MBUTTONUP:
736 case WM_XBUTTONUP:
737 case WM_LBUTTONDOWN:
738 case WM_LBUTTONDBLCLK:
739 case WM_RBUTTONDOWN:
740 case WM_RBUTTONDBLCLK:
741 case WM_MBUTTONDOWN:
742 case WM_MBUTTONDBLCLK:
743 case WM_XBUTTONDOWN:
744 case WM_XBUTTONDBLCLK:
745 {
746 SDL_Mouse *mouse = SDL_GetMouse();
747 if (!mouse->relative_mode || mouse->relative_mode_warp) {
748 if (GetMouseMessageSource() != SDL_MOUSE_EVENT_SOURCE_TOUCH &&
749 lParam != data->last_pointer_update) {
750 WIN_CheckWParamMouseButtons(wParam, data, 0);
751 }
752 }
753 }
754 break;
755
756 case WM_INPUT:
757 {
758 SDL_Mouse *mouse = SDL_GetMouse();
759 HRAWINPUT hRawInput = (HRAWINPUT)lParam;
760 RAWINPUT inp;
761 UINT size = sizeof(inp);
762
763 /* We only use raw mouse input in relative mode */
764 if (!mouse->relative_mode || mouse->relative_mode_warp) {
765 break;
766 }
767
768 /* Relative mouse motion is delivered to the window with keyboard focus */
769 if (data->window != SDL_GetKeyboardFocus()) {
770 break;
771 }
772
773 GetRawInputData(hRawInput, RID_INPUT, &inp, &size, sizeof(RAWINPUTHEADER));
774
775 /* Mouse data (ignoring synthetic mouse events generated for touchscreens) */
776 if (inp.header.dwType == RIM_TYPEMOUSE) {
777 SDL_MouseID mouseID;
778 RAWMOUSE* rawmouse;
779 if (SDL_GetNumTouchDevices() > 0 &&
780 (GetMouseMessageSource() == SDL_MOUSE_EVENT_SOURCE_TOUCH || (GetMessageExtraInfo() & 0x82) == 0x82)) {
781 break;
782 }
783 /* We do all of our mouse state checking against mouse ID 0
784 * We would only use the actual hDevice if we were tracking
785 * all mouse motion independently, and never using mouse ID 0.
786 */
787 mouseID = 0; /* (SDL_MouseID)(uintptr_t)inp.header.hDevice; */
788 rawmouse = &inp.data.mouse;
789
790 if ((rawmouse->usFlags & 0x01) == MOUSE_MOVE_RELATIVE) {
791 SDL_SendMouseMotion(data->window, mouseID, 1, (int)rawmouse->lLastX, (int)rawmouse->lLastY);
792 } else if (rawmouse->lLastX || rawmouse->lLastY) {
793 /* This is absolute motion, either using a tablet or mouse over RDP
794
795 Notes on how RDP appears to work, as of Windows 10 2004:
796 - SetCursorPos() calls are cached, with multiple calls coalesced into a single call that's sent to the RDP client. If the last call to SetCursorPos() has the same value as the last one that was sent to the client, it appears to be ignored and not sent. This means that we need to jitter the SetCursorPos() position slightly in order for the recentering to work correctly.
797 - User mouse motion is coalesced with SetCursorPos(), so the WM_INPUT positions we see will not necessarily match the positon we requested with SetCursorPos().
798 - SetCursorPos() outside of the bounds of the focus window appears not to do anything.
799 - SetCursorPos() while the cursor is NULL doesn't do anything
800
801 We handle this by creating a safe area within the application window, and when the mouse leaves that safe area, we warp back to the opposite side. Any single motion > 50% of the safe area is assumed to be a warp and ignored.
802 */
803 SDL_bool remote_desktop = GetSystemMetrics(SM_REMOTESESSION) ? SDL_TRUE : SDL_FALSE;
804 SDL_bool virtual_desktop = (rawmouse->usFlags & MOUSE_VIRTUAL_DESKTOP) ? SDL_TRUE : SDL_FALSE;
805 SDL_bool normalized_coordinates = ((rawmouse->usFlags & 0x40) == 0) ? SDL_TRUE : SDL_FALSE;
806 int w = GetSystemMetrics(virtual_desktop ? SM_CXVIRTUALSCREEN : SM_CXSCREEN);
807 int h = GetSystemMetrics(virtual_desktop ? SM_CYVIRTUALSCREEN : SM_CYSCREEN);
808 int x = normalized_coordinates ? (int)(((float)rawmouse->lLastX / 65535.0f) * w) : (int)rawmouse->lLastX;
809 int y = normalized_coordinates ? (int)(((float)rawmouse->lLastY / 65535.0f) * h) : (int)rawmouse->lLastY;
810 int relX, relY;
811
812 /* Calculate relative motion */
813 if (data->last_raw_mouse_position.x == 0 && data->last_raw_mouse_position.y == 0) {
814 data->last_raw_mouse_position.x = x;
815 data->last_raw_mouse_position.y = y;
816 }
817 relX = (int)(x - data->last_raw_mouse_position.x);
818 relY = (int)(y - data->last_raw_mouse_position.y);
819
820 if (remote_desktop) {
821 if (!data->in_title_click && !data->focus_click_pending) {
822 static int wobble;
823 float floatX = (float)x / w;
824 float floatY = (float)y / h;
825
826 /* See if the mouse is at the edge of the screen, or in the RDP title bar area */
827 if (floatX <= 0.01f || floatX >= 0.99f || floatY <= 0.01f || floatY >= 0.99f || y < 32) {
828 /* Wobble the cursor position so it's not ignored if the last warp didn't have any effect */
829 RECT rect = data->cursor_clipped_rect;
830 int warpX = rect.left + ((rect.right - rect.left) / 2) + wobble;
831 int warpY = rect.top + ((rect.bottom - rect.top) / 2);
832
833 WIN_SetCursorPos(warpX, warpY);
834
835 ++wobble;
836 if (wobble > 1) {
837 wobble = -1;
838 }
839 } else {
840 /* Send relative motion if we didn't warp last frame (had good position data)
841 We also sometimes get large deltas due to coalesced mouse motion and warping,
842 so ignore those.
843 */
844 const int MAX_RELATIVE_MOTION = (h / 6);
845 if (SDL_abs(relX) < MAX_RELATIVE_MOTION &&
846 SDL_abs(relY) < MAX_RELATIVE_MOTION) {
847 SDL_SendMouseMotion(data->window, mouseID, 1, relX, relY);
848 }
849 }
850 }
851 } else {
852 const int MAXIMUM_TABLET_RELATIVE_MOTION = 32;
853 if (SDL_abs(relX) > MAXIMUM_TABLET_RELATIVE_MOTION ||
854 SDL_abs(relY) > MAXIMUM_TABLET_RELATIVE_MOTION) {
855 /* Ignore this motion, probably a pen lift and drop */
856 } else {
857 SDL_SendMouseMotion(data->window, mouseID, 1, relX, relY);
858 }
859 }
860
861 data->last_raw_mouse_position.x = x;
862 data->last_raw_mouse_position.y = y;
863 }
864 WIN_CheckRawMouseButtons(rawmouse->usButtonFlags, data, mouseID);
865 }
866 }
867 break;
868
869 case WM_MOUSEWHEEL:
870 case WM_MOUSEHWHEEL:
871 {
872 short amount = GET_WHEEL_DELTA_WPARAM(wParam);
873 float fAmount = (float) amount / WHEEL_DELTA;
874 if (msg == WM_MOUSEWHEEL)
875 SDL_SendMouseWheel(data->window, 0, 0.0f, fAmount, SDL_MOUSEWHEEL_NORMAL);
876 else
877 SDL_SendMouseWheel(data->window, 0, fAmount, 0.0f, SDL_MOUSEWHEEL_NORMAL);
878 }
879 break;
880
881 case WM_MOUSELEAVE:
882 if (!(data->window->flags & SDL_WINDOW_MOUSE_CAPTURE)) {
883 if (SDL_GetMouseFocus() == data->window && !SDL_GetMouse()->relative_mode && !IsIconic(hwnd)) {
884 SDL_Mouse *mouse;
885 POINT cursorPos;
886 GetCursorPos(&cursorPos);
887 ScreenToClient(hwnd, &cursorPos);
888 mouse = SDL_GetMouse();
889 if (!mouse->was_touch_mouse_events) { /* we're not a touch handler causing a mouse leave? */
890 SDL_SendMouseMotion(data->window, 0, 0, cursorPos.x, cursorPos.y);
891 } else { /* touch handling? */
892 mouse->was_touch_mouse_events = SDL_FALSE; /* not anymore */
893 if (mouse->touch_mouse_events) { /* convert touch to mouse events */
894 SDL_SendMouseMotion(data->window, SDL_TOUCH_MOUSEID, 0, cursorPos.x, cursorPos.y);
895 } else { /* normal handling */
896 SDL_SendMouseMotion(data->window, 0, 0, cursorPos.x, cursorPos.y);
897 }
898 }
899 }
900
901 /* When WM_MOUSELEAVE is fired we can be assured that the cursor has left the window */
902 SDL_SetMouseFocus(NULL);
903 }
904
905 /* Once we get WM_MOUSELEAVE we're guaranteed that the window is no longer tracked */
906 data->mouse_tracked = SDL_FALSE;
907
908 returnCode = 0;
909 break;
910
911 case WM_KEYDOWN:
912 case WM_SYSKEYDOWN:
913 {
914 SDL_Scancode code = WindowsScanCodeToSDLScanCode(lParam, wParam);
915 const Uint8 *keyboardState = SDL_GetKeyboardState(NULL);
916
917 /* Detect relevant keyboard shortcuts */
918 if (keyboardState[SDL_SCANCODE_LALT] == SDL_PRESSED || keyboardState[SDL_SCANCODE_RALT] == SDL_PRESSED) {
919 /* ALT+F4: Close window */
920 if (code == SDL_SCANCODE_F4 && ShouldGenerateWindowCloseOnAltF4()) {
921 SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_CLOSE, 0, 0);
922 }
923 }
924
925 if (code != SDL_SCANCODE_UNKNOWN) {
926 SDL_SendKeyboardKey(SDL_PRESSED, code);
927 }
928 }
929
930 returnCode = 0;
931 break;
932
933 case WM_SYSKEYUP:
934 case WM_KEYUP:
935 {
936 SDL_Scancode code = WindowsScanCodeToSDLScanCode(lParam, wParam);
937 const Uint8 *keyboardState = SDL_GetKeyboardState(NULL);
938
939 if (code != SDL_SCANCODE_UNKNOWN) {
940 if (code == SDL_SCANCODE_PRINTSCREEN &&
941 keyboardState[code] == SDL_RELEASED) {
942 SDL_SendKeyboardKey(SDL_PRESSED, code);
943 }
944 SDL_SendKeyboardKey(SDL_RELEASED, code);
945 }
946 }
947 returnCode = 0;
948 break;
949
950 case WM_UNICHAR:
951 if (wParam == UNICODE_NOCHAR) {
952 returnCode = 1;
953 } else {
954 char text[5];
955 if (WIN_ConvertUTF32toUTF8((UINT32)wParam, text)) {
956 SDL_SendKeyboardText(text);
957 }
958 returnCode = 0;
959 }
960 break;
961
962 case WM_CHAR:
963 /* When a user enters a Unicode code point defined in the Basic Multilingual Plane, Windows sends a WM_CHAR
964 message with the code point encoded as UTF-16. When a user enters a Unicode code point from a Supplementary
965 Plane, Windows sends the code point in two separate WM_CHAR messages: The first message includes the UTF-16
966 High Surrogate and the second the UTF-16 Low Surrogate. The High and Low Surrogates cannot be individually
967 converted to valid UTF-8, therefore, we must save the High Surrogate from the first WM_CHAR message and
968 concatenate it with the Low Surrogate from the second WM_CHAR message. At that point, we have a valid
969 UTF-16 surrogate pair ready to re-encode as UTF-8. */
970 if (IS_HIGH_SURROGATE(wParam)) {
971 data->high_surrogate = (WCHAR)wParam;
972 } else if (IS_SURROGATE_PAIR(data->high_surrogate, wParam)) {
973 /* The code point is in a Supplementary Plane.
974 Here wParam is the Low Surrogate. */
975 char text[5];
976 if (WIN_ConvertUTF16toUTF8((UINT32)data->high_surrogate, (UINT32)wParam, text)) {
977 SDL_SendKeyboardText(text);
978 }
979 data->high_surrogate = 0;
980 } else {
981 /* The code point is in the Basic Multilingual Plane.
982 It's numerically equal to UTF-32. */
983 char text[5];
984 if (WIN_ConvertUTF32toUTF8((UINT32)wParam, text)) {
985 SDL_SendKeyboardText(text);
986 }
987 }
988 returnCode = 0;
989 break;
990
991 #ifdef WM_INPUTLANGCHANGE
992 case WM_INPUTLANGCHANGE:
993 {
994 WIN_UpdateKeymap();
995 SDL_SendKeymapChangedEvent();
996 }
997 returnCode = 1;
998 break;
999 #endif /* WM_INPUTLANGCHANGE */
1000
1001 case WM_NCLBUTTONDOWN:
1002 {
1003 data->in_title_click = SDL_TRUE;
1004 }
1005 break;
1006
1007 case WM_CAPTURECHANGED:
1008 {
1009 data->in_title_click = SDL_FALSE;
1010
1011 /* The mouse may have been released during a modal loop */
1012 WIN_CheckAsyncMouseRelease(data);
1013 }
1014 break;
1015
1016 #ifdef WM_GETMINMAXINFO
1017 case WM_GETMINMAXINFO:
1018 {
1019 MINMAXINFO *info;
1020 RECT size;
1021 int x, y;
1022 int w, h;
1023 int min_w, min_h;
1024 int max_w, max_h;
1025 BOOL constrain_max_size;
1026
1027 if (SDL_IsShapedWindow(data->window)) {
1028 Win32_ResizeWindowShape(data->window);
1029 }
1030
1031 /* If this is an expected size change, allow it */
1032 if (data->expected_resize) {
1033 break;
1034 }
1035
1036 /* Get the current position of our window */
1037 GetWindowRect(hwnd, &size);
1038 x = size.left;
1039 y = size.top;
1040
1041 /* Calculate current size of our window */
1042 SDL_GetWindowSize(data->window, &w, &h);
1043 SDL_GetWindowMinimumSize(data->window, &min_w, &min_h);
1044 SDL_GetWindowMaximumSize(data->window, &max_w, &max_h);
1045
1046 /* Store in min_w and min_h difference between current size and minimal
1047 size so we don't need to call AdjustWindowRectEx twice */
1048 min_w -= w;
1049 min_h -= h;
1050 if (max_w && max_h) {
1051 max_w -= w;
1052 max_h -= h;
1053 constrain_max_size = TRUE;
1054 } else {
1055 constrain_max_size = FALSE;
1056 }
1057
1058 if (!(SDL_GetWindowFlags(data->window) & SDL_WINDOW_BORDERLESS)) {
1059 LONG style = GetWindowLong(hwnd, GWL_STYLE);
1060 /* DJM - according to the docs for GetMenu(), the
1061 return value is undefined if hwnd is a child window.
1062 Apparently it's too difficult for MS to check
1063 inside their function, so I have to do it here.
1064 */
1065 BOOL menu = (style & WS_CHILDWINDOW) ? FALSE : (GetMenu(hwnd) != NULL);
1066 size.top = 0;
1067 size.left = 0;
1068 size.bottom = h;
1069 size.right = w;
1070
1071 AdjustWindowRectEx(&size, style, menu, 0);
1072 w = size.right - size.left;
1073 h = size.bottom - size.top;
1074 }
1075
1076 /* Fix our size to the current size */
1077 info = (MINMAXINFO *) lParam;
1078 if (SDL_GetWindowFlags(data->window) & SDL_WINDOW_RESIZABLE) {
1079 if (SDL_GetWindowFlags(data->window) & SDL_WINDOW_BORDERLESS) {
1080 int screenW = GetSystemMetrics(SM_CXSCREEN);
1081 int screenH = GetSystemMetrics(SM_CYSCREEN);
1082 info->ptMaxSize.x = SDL_max(w, screenW);
1083 info->ptMaxSize.y = SDL_max(h, screenH);
1084 info->ptMaxPosition.x = SDL_min(0, ((screenW - w) / 2));
1085 info->ptMaxPosition.y = SDL_min(0, ((screenH - h) / 2));
1086 }
1087 info->ptMinTrackSize.x = w + min_w;
1088 info->ptMinTrackSize.y = h + min_h;
1089 if (constrain_max_size) {
1090 info->ptMaxTrackSize.x = w + max_w;
1091 info->ptMaxTrackSize.y = h + max_h;
1092 }
1093 } else {
1094 info->ptMaxSize.x = w;
1095 info->ptMaxSize.y = h;
1096 info->ptMaxPosition.x = x;
1097 info->ptMaxPosition.y = y;
1098 info->ptMinTrackSize.x = w;
1099 info->ptMinTrackSize.y = h;
1100 info->ptMaxTrackSize.x = w;
1101 info->ptMaxTrackSize.y = h;
1102 }
1103 }
1104 returnCode = 0;
1105 break;
1106 #endif /* WM_GETMINMAXINFO */
1107
1108 case WM_WINDOWPOSCHANGING:
1109
1110 if (data->expected_resize) {
1111 returnCode = 0;
1112 }
1113 break;
1114
1115 case WM_WINDOWPOSCHANGED:
1116 {
1117 RECT rect;
1118 int x, y;
1119 int w, h;
1120
1121 if (data->initializing || data->in_border_change) {
1122 break;
1123 }
1124
1125 if (!GetClientRect(hwnd, &rect) || IsRectEmpty(&rect)) {
1126 break;
1127 }
1128 ClientToScreen(hwnd, (LPPOINT) & rect);
1129 ClientToScreen(hwnd, (LPPOINT) & rect + 1);
1130
1131 WIN_UpdateClipCursor(data->window);
1132
1133 x = rect.left;
1134 y = rect.top;
1135 SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_MOVED, x, y);
1136
1137 w = rect.right - rect.left;
1138 h = rect.bottom - rect.top;
1139 SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_RESIZED, w, h);
1140
1141 /* Forces a WM_PAINT event */
1142 InvalidateRect(hwnd, NULL, FALSE);
1143
1144 WIN_CheckICMProfileChanged(data->window);
1145 }
1146 break;
1147
1148 case WM_SIZE:
1149 {
1150 switch (wParam) {
1151 case SIZE_MAXIMIZED:
1152 SDL_SendWindowEvent(data->window,
1153 SDL_WINDOWEVENT_RESTORED, 0, 0);
1154 SDL_SendWindowEvent(data->window,
1155 SDL_WINDOWEVENT_MAXIMIZED, 0, 0);
1156 break;
1157 case SIZE_MINIMIZED:
1158 SDL_SendWindowEvent(data->window,
1159 SDL_WINDOWEVENT_MINIMIZED, 0, 0);
1160 break;
1161 default:
1162 SDL_SendWindowEvent(data->window,
1163 SDL_WINDOWEVENT_RESTORED, 0, 0);
1164 break;
1165 }
1166 }
1167 break;
1168
1169 case WM_SETCURSOR:
1170 {
1171 Uint16 hittest;
1172
1173 hittest = LOWORD(lParam);
1174 if (hittest == HTCLIENT) {
1175 SetCursor(SDL_cursor);
1176 returnCode = TRUE;
1177 } else if (!g_WindowFrameUsableWhileCursorHidden && !SDL_cursor) {
1178 SetCursor(NULL);
1179 returnCode = TRUE;
1180 }
1181 }
1182 break;
1183
1184 /* We were occluded, refresh our display */
1185 case WM_PAINT:
1186 {
1187 RECT rect;
1188 if (GetUpdateRect(hwnd, &rect, FALSE)) {
1189 ValidateRect(hwnd, NULL);
1190 SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_EXPOSED, 0, 0);
1191 }
1192 }
1193 returnCode = 0;
1194 break;
1195
1196 /* We'll do our own drawing, prevent flicker */
1197 case WM_ERASEBKGND:
1198 {
1199 }
1200 return (1);
1201
1202 case WM_SYSCOMMAND:
1203 {
1204 if ((wParam & 0xFFF0) == SC_KEYMENU) {
1205 return (0);
1206 }
1207
1208 #if defined(SC_SCREENSAVE) || defined(SC_MONITORPOWER)
1209 /* Don't start the screensaver or blank the monitor in fullscreen apps */
1210 if ((wParam & 0xFFF0) == SC_SCREENSAVE ||
1211 (wParam & 0xFFF0) == SC_MONITORPOWER) {
1212 if (SDL_GetVideoDevice()->suspend_screensaver) {
1213 return (0);
1214 }
1215 }
1216 #endif /* System has screensaver support */
1217 }
1218 break;
1219
1220 case WM_CLOSE:
1221 {
1222 SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_CLOSE, 0, 0);
1223 }
1224 returnCode = 0;
1225 break;
1226
1227 case WM_TOUCH:
1228 if (data->videodata->GetTouchInputInfo && data->videodata->CloseTouchInputHandle) {
1229 UINT i, num_inputs = LOWORD(wParam);
1230 SDL_bool isstack;
1231 PTOUCHINPUT inputs = SDL_small_alloc(TOUCHINPUT, num_inputs, &isstack);
1232 if (data->videodata->GetTouchInputInfo((HTOUCHINPUT)lParam, num_inputs, inputs, sizeof(TOUCHINPUT))) {
1233 RECT rect;
1234 float x, y;
1235
1236 if (!GetClientRect(hwnd, &rect) ||
1237 (rect.right == rect.left && rect.bottom == rect.top)) {
1238 if (inputs) {
1239 SDL_small_free(inputs, isstack);
1240 }
1241 break;
1242 }
1243 ClientToScreen(hwnd, (LPPOINT) & rect);
1244 ClientToScreen(hwnd, (LPPOINT) & rect + 1);
1245 rect.top *= 100;
1246 rect.left *= 100;
1247 rect.bottom *= 100;
1248 rect.right *= 100;
1249
1250 for (i = 0; i < num_inputs; ++i) {
1251 PTOUCHINPUT input = &inputs[i];
1252
1253 const SDL_TouchID touchId = (SDL_TouchID)((size_t)input->hSource);
1254
1255 /* TODO: Can we use GetRawInputDeviceInfo and HID info to
1256 determine if this is a direct or indirect touch device?
1257 */
1258 if (SDL_AddTouch(touchId, SDL_TOUCH_DEVICE_DIRECT, "") < 0) {
1259 continue;
1260 }
1261
1262 /* Get the normalized coordinates for the window */
1263 x = (float)(input->x - rect.left)/(rect.right - rect.left);
1264 y = (float)(input->y - rect.top)/(rect.bottom - rect.top);
1265
1266 if (input->dwFlags & TOUCHEVENTF_DOWN) {
1267 SDL_SendTouch(touchId, input->dwID, data->window, SDL_TRUE, x, y, 1.0f);
1268 }
1269 if (input->dwFlags & TOUCHEVENTF_MOVE) {
1270 SDL_SendTouchMotion(touchId, input->dwID, data->window, x, y, 1.0f);
1271 }
1272 if (input->dwFlags & TOUCHEVENTF_UP) {
1273 SDL_SendTouch(touchId, input->dwID, data->window, SDL_FALSE, x, y, 1.0f);
1274 }
1275 }
1276 }
1277 SDL_small_free(inputs, isstack);
1278
1279 data->videodata->CloseTouchInputHandle((HTOUCHINPUT)lParam);
1280 return 0;
1281 }
1282 break;
1283
1284 case WM_DROPFILES:
1285 {
1286 UINT i;
1287 HDROP drop = (HDROP) wParam;
1288 UINT count = DragQueryFile(drop, 0xFFFFFFFF, NULL, 0);
1289 for (i = 0; i < count; ++i) {
1290 SDL_bool isstack;
1291 UINT size = DragQueryFile(drop, i, NULL, 0) + 1;
1292 LPTSTR buffer = SDL_small_alloc(TCHAR, size, &isstack);
1293 if (buffer) {
1294 if (DragQueryFile(drop, i, buffer, size)) {
1295 char *file = WIN_StringToUTF8(buffer);
1296 SDL_SendDropFile(data->window, file);
1297 SDL_free(file);
1298 }
1299 SDL_small_free(buffer, isstack);
1300 }
1301 }
1302 SDL_SendDropComplete(data->window);
1303 DragFinish(drop);
1304 return 0;
1305 }
1306 break;
1307
1308 case WM_DISPLAYCHANGE:
1309 {
1310 // Reacquire displays if any were added or removed
1311 WIN_RefreshDisplays(SDL_GetVideoDevice());
1312 }
1313 break;
1314
1315 case WM_NCCALCSIZE:
1316 {
1317 Uint32 window_flags = SDL_GetWindowFlags(data->window);
1318 if (wParam == TRUE && (window_flags & SDL_WINDOW_BORDERLESS) && !(window_flags & SDL_WINDOW_FULLSCREEN)) {
1319 /* When borderless, need to tell windows that the size of the non-client area is 0 */
1320 if (!(window_flags & SDL_WINDOW_RESIZABLE)) {
1321 int w, h;
1322 NCCALCSIZE_PARAMS *params = (NCCALCSIZE_PARAMS *)lParam;
1323 w = data->window->windowed.w;
1324 h = data->window->windowed.h;
1325 params->rgrc[0].right = params->rgrc[0].left + w;
1326 params->rgrc[0].bottom = params->rgrc[0].top + h;
1327 }
1328 return 0;
1329 }
1330 }
1331 break;
1332
1333 case WM_NCHITTEST:
1334 {
1335 SDL_Window *window = data->window;
1336 if (window->hit_test) {
1337 POINT winpoint = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
1338 if (ScreenToClient(hwnd, &winpoint)) {
1339 const SDL_Point point = { (int) winpoint.x, (int) winpoint.y };
1340 const SDL_HitTestResult rc = window->hit_test(window, &point, window->hit_test_data);
1341 switch (rc) {
1342 #define POST_HIT_TEST(ret) { SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_HIT_TEST, 0, 0); return ret; }
1343 case SDL_HITTEST_DRAGGABLE: POST_HIT_TEST(HTCAPTION);
1344 case SDL_HITTEST_RESIZE_TOPLEFT: POST_HIT_TEST(HTTOPLEFT);
1345 case SDL_HITTEST_RESIZE_TOP: POST_HIT_TEST(HTTOP);
1346 case SDL_HITTEST_RESIZE_TOPRIGHT: POST_HIT_TEST(HTTOPRIGHT);
1347 case SDL_HITTEST_RESIZE_RIGHT: POST_HIT_TEST(HTRIGHT);
1348 case SDL_HITTEST_RESIZE_BOTTOMRIGHT: POST_HIT_TEST(HTBOTTOMRIGHT);
1349 case SDL_HITTEST_RESIZE_BOTTOM: POST_HIT_TEST(HTBOTTOM);
1350 case SDL_HITTEST_RESIZE_BOTTOMLEFT: POST_HIT_TEST(HTBOTTOMLEFT);
1351 case SDL_HITTEST_RESIZE_LEFT: POST_HIT_TEST(HTLEFT);
1352 #undef POST_HIT_TEST
1353 case SDL_HITTEST_NORMAL: return HTCLIENT;
1354 }
1355 }
1356 /* If we didn't return, this will call DefWindowProc below. */
1357 }
1358 }
1359 break;
1360 }
1361
1362 /* If there's a window proc, assume it's going to handle messages */
1363 if (data->wndproc) {
1364 return CallWindowProc(data->wndproc, hwnd, msg, wParam, lParam);
1365 } else if (returnCode >= 0) {
1366 return returnCode;
1367 } else {
1368 return CallWindowProc(DefWindowProc, hwnd, msg, wParam, lParam);
1369 }
1370 }
1371
WIN_UpdateClipCursorForWindows()1372 static void WIN_UpdateClipCursorForWindows()
1373 {
1374 SDL_VideoDevice *_this = SDL_GetVideoDevice();
1375 SDL_Window *window;
1376 Uint32 now = SDL_GetTicks();
1377 const Uint32 CLIPCURSOR_UPDATE_INTERVAL_MS = 3000;
1378
1379 if (_this) {
1380 for (window = _this->windows; window; window = window->next) {
1381 SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
1382 if (data) {
1383 if (data->skip_update_clipcursor) {
1384 data->skip_update_clipcursor = SDL_FALSE;
1385 WIN_UpdateClipCursor(window);
1386 } else if ((now - data->last_updated_clipcursor) >= CLIPCURSOR_UPDATE_INTERVAL_MS) {
1387 WIN_UpdateClipCursor(window);
1388 }
1389 }
1390 }
1391 }
1392 }
1393
WIN_UpdateMouseCapture()1394 static void WIN_UpdateMouseCapture()
1395 {
1396 SDL_Window* focusWindow = SDL_GetKeyboardFocus();
1397
1398 if (focusWindow && (focusWindow->flags & SDL_WINDOW_MOUSE_CAPTURE)) {
1399 SDL_WindowData *data = (SDL_WindowData *) focusWindow->driverdata;
1400
1401 if (!data->mouse_tracked) {
1402 POINT pt;
1403
1404 if (GetCursorPos(&pt) && ScreenToClient(data->hwnd, &pt)) {
1405 SDL_bool swapButtons = GetSystemMetrics(SM_SWAPBUTTON) != 0;
1406 SDL_MouseID mouseID = SDL_GetMouse()->mouseID;
1407
1408 SDL_SendMouseMotion(data->window, mouseID, 0, (int)pt.x, (int)pt.y);
1409 SDL_SendMouseButton(data->window, mouseID, GetAsyncKeyState(VK_LBUTTON) & 0x8000 ? SDL_PRESSED : SDL_RELEASED, !swapButtons ? SDL_BUTTON_LEFT : SDL_BUTTON_RIGHT);
1410 SDL_SendMouseButton(data->window, mouseID, GetAsyncKeyState(VK_RBUTTON) & 0x8000 ? SDL_PRESSED : SDL_RELEASED, !swapButtons ? SDL_BUTTON_RIGHT : SDL_BUTTON_LEFT);
1411 SDL_SendMouseButton(data->window, mouseID, GetAsyncKeyState(VK_MBUTTON) & 0x8000 ? SDL_PRESSED : SDL_RELEASED, SDL_BUTTON_MIDDLE);
1412 SDL_SendMouseButton(data->window, mouseID, GetAsyncKeyState(VK_XBUTTON1) & 0x8000 ? SDL_PRESSED : SDL_RELEASED, SDL_BUTTON_X1);
1413 SDL_SendMouseButton(data->window, mouseID, GetAsyncKeyState(VK_XBUTTON2) & 0x8000 ? SDL_PRESSED : SDL_RELEASED, SDL_BUTTON_X2);
1414 }
1415 }
1416 }
1417 }
1418
1419 /* A message hook called before TranslateMessage() */
1420 static SDL_WindowsMessageHook g_WindowsMessageHook = NULL;
1421 static void *g_WindowsMessageHookData = NULL;
1422
SDL_SetWindowsMessageHook(SDL_WindowsMessageHook callback,void * userdata)1423 void SDL_SetWindowsMessageHook(SDL_WindowsMessageHook callback, void *userdata)
1424 {
1425 g_WindowsMessageHook = callback;
1426 g_WindowsMessageHookData = userdata;
1427 }
1428
1429 int
WIN_WaitEventTimeout(_THIS,int timeout)1430 WIN_WaitEventTimeout(_THIS, int timeout)
1431 {
1432 MSG msg;
1433 if (g_WindowsEnableMessageLoop) {
1434 BOOL message_result;
1435 UINT_PTR timer_id = 0;
1436 if (timeout > 0) {
1437 timer_id = SetTimer(NULL, 0, timeout, NULL);
1438 message_result = GetMessage(&msg, 0, 0, 0);
1439 KillTimer(NULL, timer_id);
1440 } else if (timeout == 0) {
1441 message_result = PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
1442 } else {
1443 message_result = GetMessage(&msg, 0, 0, 0);
1444 }
1445 if (message_result) {
1446 if (msg.message == WM_TIMER && msg.hwnd == NULL && msg.wParam == timer_id) {
1447 return 0;
1448 }
1449 if (g_WindowsMessageHook) {
1450 g_WindowsMessageHook(g_WindowsMessageHookData, msg.hwnd, msg.message, msg.wParam, msg.lParam);
1451 }
1452 /* Always translate the message in case it's a non-SDL window (e.g. with Qt integration) */
1453 TranslateMessage(&msg);
1454 DispatchMessage(&msg);
1455 return 1;
1456 } else {
1457 return 0;
1458 }
1459 } else {
1460 /* Fail the wait so the caller falls back to polling */
1461 return -1;
1462 }
1463 }
1464
1465 void
WIN_SendWakeupEvent(_THIS,SDL_Window * window)1466 WIN_SendWakeupEvent(_THIS, SDL_Window *window)
1467 {
1468 SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
1469 PostMessage(data->hwnd, data->videodata->_SDL_WAKEUP, 0, 0);
1470 }
1471
1472 void
WIN_PumpEvents(_THIS)1473 WIN_PumpEvents(_THIS)
1474 {
1475 const Uint8 *keystate;
1476 MSG msg;
1477 DWORD end_ticks = GetTickCount() + 1;
1478 int new_messages = 0;
1479 SDL_Window *focusWindow;
1480
1481 if (g_WindowsEnableMessageLoop) {
1482 while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
1483 if (g_WindowsMessageHook) {
1484 g_WindowsMessageHook(g_WindowsMessageHookData, msg.hwnd, msg.message, msg.wParam, msg.lParam);
1485 }
1486
1487 /* Don't dispatch any mouse motion queued prior to or including the last mouse warp */
1488 if (msg.message == WM_MOUSEMOVE && SDL_last_warp_time) {
1489 if (!SDL_TICKS_PASSED(msg.time, (SDL_last_warp_time + 1))) {
1490 continue;
1491 }
1492
1493 /* This mouse message happened after the warp */
1494 SDL_last_warp_time = 0;
1495 }
1496
1497 /* Always translate the message in case it's a non-SDL window (e.g. with Qt integration) */
1498 TranslateMessage(&msg);
1499 DispatchMessage(&msg);
1500
1501 /* Make sure we don't busy loop here forever if there are lots of events coming in */
1502 if (SDL_TICKS_PASSED(msg.time, end_ticks)) {
1503 /* We might get a few new messages generated by the Steam overlay or other application hooks
1504 In this case those messages will be processed before any pending input, so we want to continue after those messages.
1505 (thanks to Peter Deayton for his investigation here)
1506 */
1507 const int MAX_NEW_MESSAGES = 3;
1508 ++new_messages;
1509 if (new_messages > MAX_NEW_MESSAGES) {
1510 break;
1511 }
1512 }
1513 }
1514 }
1515
1516 /* Windows loses a shift KEYUP event when you have both pressed at once and let go of one.
1517 You won't get a KEYUP until both are released, and that keyup will only be for the second
1518 key you released. Take heroic measures and check the keystate as of the last handled event,
1519 and if we think a key is pressed when Windows doesn't, unstick it in SDL's state. */
1520 keystate = SDL_GetKeyboardState(NULL);
1521 if ((keystate[SDL_SCANCODE_LSHIFT] == SDL_PRESSED) && !(GetKeyState(VK_LSHIFT) & 0x8000)) {
1522 SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_LSHIFT);
1523 }
1524 if ((keystate[SDL_SCANCODE_RSHIFT] == SDL_PRESSED) && !(GetKeyState(VK_RSHIFT) & 0x8000)) {
1525 SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_RSHIFT);
1526 }
1527
1528 /* The Windows key state gets lost when using Windows+Space or Windows+G shortcuts and
1529 not grabbing the keyboard. Note: If we *are* grabbing the keyboard, GetKeyState()
1530 will return inaccurate results for VK_LWIN and VK_RWIN but we don't need it anyway. */
1531 focusWindow = SDL_GetKeyboardFocus();
1532 if (!focusWindow || !(focusWindow->flags & SDL_WINDOW_KEYBOARD_GRABBED)) {
1533 if ((keystate[SDL_SCANCODE_LGUI] == SDL_PRESSED) && !(GetKeyState(VK_LWIN) & 0x8000)) {
1534 SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_LGUI);
1535 }
1536 if ((keystate[SDL_SCANCODE_RGUI] == SDL_PRESSED) && !(GetKeyState(VK_RWIN) & 0x8000)) {
1537 SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_RGUI);
1538 }
1539 }
1540
1541 /* Update the clipping rect in case someone else has stolen it */
1542 WIN_UpdateClipCursorForWindows();
1543
1544 /* Update mouse capture */
1545 WIN_UpdateMouseCapture();
1546 }
1547
1548
1549 static int app_registered = 0;
1550 LPTSTR SDL_Appname = NULL;
1551 Uint32 SDL_Appstyle = 0;
1552 HINSTANCE SDL_Instance = NULL;
1553
1554 /* Register the class for this application */
1555 int
SDL_RegisterApp(const char * name,Uint32 style,void * hInst)1556 SDL_RegisterApp(const char *name, Uint32 style, void *hInst)
1557 {
1558 const char *hint;
1559 WNDCLASSEX wcex;
1560 TCHAR path[MAX_PATH];
1561
1562 /* Only do this once... */
1563 if (app_registered) {
1564 ++app_registered;
1565 return (0);
1566 }
1567 if (!name && !SDL_Appname) {
1568 name = "SDL_app";
1569 #if defined(CS_BYTEALIGNCLIENT) || defined(CS_OWNDC)
1570 SDL_Appstyle = (CS_BYTEALIGNCLIENT | CS_OWNDC);
1571 #endif
1572 SDL_Instance = hInst ? hInst : GetModuleHandle(NULL);
1573 }
1574
1575 if (name) {
1576 SDL_Appname = WIN_UTF8ToString(name);
1577 SDL_Appstyle = style;
1578 SDL_Instance = hInst ? hInst : GetModuleHandle(NULL);
1579 }
1580
1581 /* Register the application class */
1582 wcex.cbSize = sizeof(WNDCLASSEX);
1583 wcex.hCursor = NULL;
1584 wcex.hIcon = NULL;
1585 wcex.hIconSm = NULL;
1586 wcex.lpszMenuName = NULL;
1587 wcex.lpszClassName = SDL_Appname;
1588 wcex.style = SDL_Appstyle;
1589 wcex.hbrBackground = NULL;
1590 wcex.lpfnWndProc = WIN_WindowProc;
1591 wcex.hInstance = SDL_Instance;
1592 wcex.cbClsExtra = 0;
1593 wcex.cbWndExtra = 0;
1594
1595 hint = SDL_GetHint(SDL_HINT_WINDOWS_INTRESOURCE_ICON);
1596 if (hint && *hint) {
1597 wcex.hIcon = LoadIcon(SDL_Instance, MAKEINTRESOURCE(SDL_atoi(hint)));
1598
1599 hint = SDL_GetHint(SDL_HINT_WINDOWS_INTRESOURCE_ICON_SMALL);
1600 if (hint && *hint) {
1601 wcex.hIconSm = LoadIcon(SDL_Instance, MAKEINTRESOURCE(SDL_atoi(hint)));
1602 }
1603 } else {
1604 /* Use the first icon as a default icon, like in the Explorer */
1605 GetModuleFileName(SDL_Instance, path, MAX_PATH);
1606 ExtractIconEx(path, 0, &wcex.hIcon, &wcex.hIconSm, 1);
1607 }
1608
1609 if (!RegisterClassEx(&wcex)) {
1610 return SDL_SetError("Couldn't register application class");
1611 }
1612
1613 app_registered = 1;
1614 return 0;
1615 }
1616
1617 /* Unregisters the windowclass registered in SDL_RegisterApp above. */
1618 void
SDL_UnregisterApp()1619 SDL_UnregisterApp()
1620 {
1621 WNDCLASSEX wcex;
1622
1623 /* SDL_RegisterApp might not have been called before */
1624 if (!app_registered) {
1625 return;
1626 }
1627 --app_registered;
1628 if (app_registered == 0) {
1629 /* Check for any registered window classes. */
1630 if (GetClassInfoEx(SDL_Instance, SDL_Appname, &wcex)) {
1631 UnregisterClass(SDL_Appname, SDL_Instance);
1632 if (wcex.hIcon) DestroyIcon(wcex.hIcon);
1633 if (wcex.hIconSm) DestroyIcon(wcex.hIconSm);
1634 }
1635 SDL_free(SDL_Appname);
1636 SDL_Appname = NULL;
1637 }
1638 }
1639
1640 #endif /* SDL_VIDEO_DRIVER_WINDOWS */
1641
1642 /* vi: set ts=4 sw=4 expandtab: */
1643