xref: /openbmc/qemu/ui/sdl2.c (revision 7d37435bd5801bb49e1c4b550fedd1c5fe143131)
1  /*
2   * QEMU SDL display driver
3   *
4   * Copyright (c) 2003 Fabrice Bellard
5   *
6   * Permission is hereby granted, free of charge, to any person obtaining a copy
7   * of this software and associated documentation files (the "Software"), to deal
8   * in the Software without restriction, including without limitation the rights
9   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10   * copies of the Software, and to permit persons to whom the Software is
11   * furnished to do so, subject to the following conditions:
12   *
13   * The above copyright notice and this permission notice shall be included in
14   * all copies or substantial portions of the Software.
15   *
16   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22   * THE SOFTWARE.
23   */
24  /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
25  
26  #include "qemu/osdep.h"
27  #include "qemu-common.h"
28  #include "ui/console.h"
29  #include "ui/input.h"
30  #include "ui/sdl2.h"
31  #include "sysemu/sysemu.h"
32  
33  static int sdl2_num_outputs;
34  static struct sdl2_console *sdl2_console;
35  
36  static SDL_Surface *guest_sprite_surface;
37  static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
38  
39  static int gui_saved_grab;
40  static int gui_fullscreen;
41  static int gui_keysym;
42  static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
43  static SDL_Cursor *sdl_cursor_normal;
44  static SDL_Cursor *sdl_cursor_hidden;
45  static int absolute_enabled;
46  static int guest_cursor;
47  static int guest_x, guest_y;
48  static SDL_Cursor *guest_sprite;
49  static Notifier mouse_mode_notifier;
50  
51  #define SDL2_REFRESH_INTERVAL_BUSY 10
52  #define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
53                               / SDL2_REFRESH_INTERVAL_BUSY + 1)
54  
55  static void sdl_update_caption(struct sdl2_console *scon);
56  
57  static struct sdl2_console *get_scon_from_window(uint32_t window_id)
58  {
59      int i;
60      for (i = 0; i < sdl2_num_outputs; i++) {
61          if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
62              return &sdl2_console[i];
63          }
64      }
65      return NULL;
66  }
67  
68  void sdl2_window_create(struct sdl2_console *scon)
69  {
70      int flags = 0;
71  
72      if (!scon->surface) {
73          return;
74      }
75      assert(!scon->real_window);
76  
77      if (gui_fullscreen) {
78          flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
79      } else {
80          flags |= SDL_WINDOW_RESIZABLE;
81      }
82      if (scon->hidden) {
83          flags |= SDL_WINDOW_HIDDEN;
84      }
85  
86      scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
87                                           SDL_WINDOWPOS_UNDEFINED,
88                                           surface_width(scon->surface),
89                                           surface_height(scon->surface),
90                                           flags);
91      scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
92      if (scon->opengl) {
93          scon->winctx = SDL_GL_GetCurrentContext();
94      }
95      sdl_update_caption(scon);
96  }
97  
98  void sdl2_window_destroy(struct sdl2_console *scon)
99  {
100      if (!scon->real_window) {
101          return;
102      }
103  
104      SDL_DestroyRenderer(scon->real_renderer);
105      scon->real_renderer = NULL;
106      SDL_DestroyWindow(scon->real_window);
107      scon->real_window = NULL;
108  }
109  
110  void sdl2_window_resize(struct sdl2_console *scon)
111  {
112      if (!scon->real_window) {
113          return;
114      }
115  
116      SDL_SetWindowSize(scon->real_window,
117                        surface_width(scon->surface),
118                        surface_height(scon->surface));
119  }
120  
121  static void sdl2_redraw(struct sdl2_console *scon)
122  {
123      if (scon->opengl) {
124  #ifdef CONFIG_OPENGL
125          sdl2_gl_redraw(scon);
126  #endif
127      } else {
128          sdl2_2d_redraw(scon);
129      }
130  }
131  
132  static void sdl_update_caption(struct sdl2_console *scon)
133  {
134      char win_title[1024];
135      char icon_title[1024];
136      const char *status = "";
137  
138      if (!runstate_is_running()) {
139          status = " [Stopped]";
140      } else if (gui_grab) {
141          if (alt_grab) {
142              status = " - Press Ctrl-Alt-Shift-G to exit grab";
143          } else if (ctrl_grab) {
144              status = " - Press Right-Ctrl-G to exit grab";
145          } else {
146              status = " - Press Ctrl-Alt-G to exit grab";
147          }
148      }
149  
150      if (qemu_name) {
151          snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
152                   scon->idx, status);
153          snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
154      } else {
155          snprintf(win_title, sizeof(win_title), "QEMU%s", status);
156          snprintf(icon_title, sizeof(icon_title), "QEMU");
157      }
158  
159      if (scon->real_window) {
160          SDL_SetWindowTitle(scon->real_window, win_title);
161      }
162  }
163  
164  static void sdl_hide_cursor(void)
165  {
166      if (!cursor_hide) {
167          return;
168      }
169  
170      SDL_ShowCursor(SDL_DISABLE);
171      SDL_SetCursor(sdl_cursor_hidden);
172  
173      if (!qemu_input_is_absolute()) {
174          SDL_SetRelativeMouseMode(SDL_TRUE);
175      }
176  }
177  
178  static void sdl_show_cursor(void)
179  {
180      if (!cursor_hide) {
181          return;
182      }
183  
184      if (!qemu_input_is_absolute()) {
185          SDL_SetRelativeMouseMode(SDL_FALSE);
186      }
187  
188      if (guest_cursor &&
189          (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
190          SDL_SetCursor(guest_sprite);
191      } else {
192          SDL_SetCursor(sdl_cursor_normal);
193      }
194  
195      SDL_ShowCursor(SDL_ENABLE);
196  }
197  
198  static void sdl_grab_start(struct sdl2_console *scon)
199  {
200      QemuConsole *con = scon ? scon->dcl.con : NULL;
201  
202      if (!con || !qemu_console_is_graphic(con)) {
203          return;
204      }
205      /*
206       * If the application is not active, do not try to enter grab state. This
207       * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
208       * application (SDL bug).
209       */
210      if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
211          return;
212      }
213      if (guest_cursor) {
214          SDL_SetCursor(guest_sprite);
215          if (!qemu_input_is_absolute() && !absolute_enabled) {
216              SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
217          }
218      } else {
219          sdl_hide_cursor();
220      }
221      SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
222      gui_grab = 1;
223      sdl_update_caption(scon);
224  }
225  
226  static void sdl_grab_end(struct sdl2_console *scon)
227  {
228      SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
229      gui_grab = 0;
230      sdl_show_cursor();
231      sdl_update_caption(scon);
232  }
233  
234  static void absolute_mouse_grab(struct sdl2_console *scon)
235  {
236      int mouse_x, mouse_y;
237      int scr_w, scr_h;
238      SDL_GetMouseState(&mouse_x, &mouse_y);
239      SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
240      if (mouse_x > 0 && mouse_x < scr_w - 1 &&
241          mouse_y > 0 && mouse_y < scr_h - 1) {
242          sdl_grab_start(scon);
243      }
244  }
245  
246  static void sdl_mouse_mode_change(Notifier *notify, void *data)
247  {
248      if (qemu_input_is_absolute()) {
249          if (!absolute_enabled) {
250              absolute_enabled = 1;
251              SDL_SetRelativeMouseMode(SDL_FALSE);
252              absolute_mouse_grab(&sdl2_console[0]);
253          }
254      } else if (absolute_enabled) {
255          if (!gui_fullscreen) {
256              sdl_grab_end(&sdl2_console[0]);
257          }
258          absolute_enabled = 0;
259      }
260  }
261  
262  static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
263                                   int x, int y, int state)
264  {
265      static uint32_t bmap[INPUT_BUTTON__MAX] = {
266          [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
267          [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
268          [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
269      };
270      static uint32_t prev_state;
271  
272      if (prev_state != state) {
273          qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
274          prev_state = state;
275      }
276  
277      if (qemu_input_is_absolute()) {
278          qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
279                               x, 0, surface_width(scon->surface));
280          qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
281                               y, 0, surface_height(scon->surface));
282      } else {
283          if (guest_cursor) {
284              x -= guest_x;
285              y -= guest_y;
286              guest_x += x;
287              guest_y += y;
288              dx = x;
289              dy = y;
290          }
291          qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
292          qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
293      }
294      qemu_input_event_sync();
295  }
296  
297  static void toggle_full_screen(struct sdl2_console *scon)
298  {
299      gui_fullscreen = !gui_fullscreen;
300      if (gui_fullscreen) {
301          SDL_SetWindowFullscreen(scon->real_window,
302                                  SDL_WINDOW_FULLSCREEN_DESKTOP);
303          gui_saved_grab = gui_grab;
304          sdl_grab_start(scon);
305      } else {
306          if (!gui_saved_grab) {
307              sdl_grab_end(scon);
308          }
309          SDL_SetWindowFullscreen(scon->real_window, 0);
310      }
311      sdl2_redraw(scon);
312  }
313  
314  static int get_mod_state(void)
315  {
316      SDL_Keymod mod = SDL_GetModState();
317  
318      if (alt_grab) {
319          return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
320              (gui_grab_code | KMOD_LSHIFT);
321      } else if (ctrl_grab) {
322          return (mod & KMOD_RCTRL) == KMOD_RCTRL;
323      } else {
324          return (mod & gui_grab_code) == gui_grab_code;
325      }
326  }
327  
328  static void handle_keydown(SDL_Event *ev)
329  {
330      int win;
331      struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
332      int gui_key_modifier_pressed = get_mod_state();
333  
334      if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
335          switch (ev->key.keysym.scancode) {
336          case SDL_SCANCODE_2:
337          case SDL_SCANCODE_3:
338          case SDL_SCANCODE_4:
339          case SDL_SCANCODE_5:
340          case SDL_SCANCODE_6:
341          case SDL_SCANCODE_7:
342          case SDL_SCANCODE_8:
343          case SDL_SCANCODE_9:
344              if (gui_grab) {
345                  sdl_grab_end(scon);
346              }
347  
348              win = ev->key.keysym.scancode - SDL_SCANCODE_1;
349              if (win < sdl2_num_outputs) {
350                  sdl2_console[win].hidden = !sdl2_console[win].hidden;
351                  if (sdl2_console[win].real_window) {
352                      if (sdl2_console[win].hidden) {
353                          SDL_HideWindow(sdl2_console[win].real_window);
354                      } else {
355                          SDL_ShowWindow(sdl2_console[win].real_window);
356                      }
357                  }
358                  gui_keysym = 1;
359              }
360              break;
361          case SDL_SCANCODE_F:
362              toggle_full_screen(scon);
363              gui_keysym = 1;
364              break;
365          case SDL_SCANCODE_G:
366              gui_keysym = 1;
367              if (!gui_grab) {
368                  sdl_grab_start(scon);
369              } else if (!gui_fullscreen) {
370                  sdl_grab_end(scon);
371              }
372              break;
373          case SDL_SCANCODE_U:
374              sdl2_window_resize(scon);
375              if (!scon->opengl) {
376                  /* re-create scon->texture */
377                  sdl2_2d_switch(&scon->dcl, scon->surface);
378              }
379              gui_keysym = 1;
380              break;
381  #if 0
382          case SDL_SCANCODE_KP_PLUS:
383          case SDL_SCANCODE_KP_MINUS:
384              if (!gui_fullscreen) {
385                  int scr_w, scr_h;
386                  int width, height;
387                  SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
388  
389                  width = MAX(scr_w + (ev->key.keysym.scancode ==
390                                       SDL_SCANCODE_KP_PLUS ? 50 : -50),
391                              160);
392                  height = (surface_height(scon->surface) * width) /
393                      surface_width(scon->surface);
394                  fprintf(stderr, "%s: scale to %dx%d\n",
395                          __func__, width, height);
396                  sdl_scale(scon, width, height);
397                  sdl2_redraw(scon);
398                  gui_keysym = 1;
399              }
400  #endif
401          default:
402              break;
403          }
404      }
405      if (!gui_keysym) {
406          sdl2_process_key(scon, &ev->key);
407      }
408  }
409  
410  static void handle_keyup(SDL_Event *ev)
411  {
412      struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
413      int gui_key_modifier_pressed = get_mod_state();
414  
415      scon->ignore_hotkeys = false;
416  
417      if (!gui_key_modifier_pressed) {
418          gui_keysym = 0;
419      }
420      if (!gui_keysym) {
421          sdl2_process_key(scon, &ev->key);
422      }
423  }
424  
425  static void handle_textinput(SDL_Event *ev)
426  {
427      struct sdl2_console *scon = get_scon_from_window(ev->text.windowID);
428      QemuConsole *con = scon ? scon->dcl.con : NULL;
429  
430      if (qemu_console_is_graphic(con)) {
431          return;
432      }
433      kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
434  }
435  
436  static void handle_mousemotion(SDL_Event *ev)
437  {
438      int max_x, max_y;
439      struct sdl2_console *scon = get_scon_from_window(ev->motion.windowID);
440  
441      if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
442          return;
443      }
444  
445      if (qemu_input_is_absolute() || absolute_enabled) {
446          int scr_w, scr_h;
447          SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
448          max_x = scr_w - 1;
449          max_y = scr_h - 1;
450          if (gui_grab && !gui_fullscreen
451              && (ev->motion.x == 0 || ev->motion.y == 0 ||
452                  ev->motion.x == max_x || ev->motion.y == max_y)) {
453              sdl_grab_end(scon);
454          }
455          if (!gui_grab &&
456              (ev->motion.x > 0 && ev->motion.x < max_x &&
457               ev->motion.y > 0 && ev->motion.y < max_y)) {
458              sdl_grab_start(scon);
459          }
460      }
461      if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
462          sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
463                               ev->motion.x, ev->motion.y, ev->motion.state);
464      }
465  }
466  
467  static void handle_mousebutton(SDL_Event *ev)
468  {
469      int buttonstate = SDL_GetMouseState(NULL, NULL);
470      SDL_MouseButtonEvent *bev;
471      struct sdl2_console *scon = get_scon_from_window(ev->button.windowID);
472  
473      if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
474          return;
475      }
476  
477      bev = &ev->button;
478      if (!gui_grab && !qemu_input_is_absolute()) {
479          if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
480              /* start grabbing all events */
481              sdl_grab_start(scon);
482          }
483      } else {
484          if (ev->type == SDL_MOUSEBUTTONDOWN) {
485              buttonstate |= SDL_BUTTON(bev->button);
486          } else {
487              buttonstate &= ~SDL_BUTTON(bev->button);
488          }
489          sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
490      }
491  }
492  
493  static void handle_mousewheel(SDL_Event *ev)
494  {
495      struct sdl2_console *scon = get_scon_from_window(ev->wheel.windowID);
496      SDL_MouseWheelEvent *wev = &ev->wheel;
497      InputButton btn;
498  
499      if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
500          return;
501      }
502  
503      if (wev->y > 0) {
504          btn = INPUT_BUTTON_WHEEL_UP;
505      } else if (wev->y < 0) {
506          btn = INPUT_BUTTON_WHEEL_DOWN;
507      } else {
508          return;
509      }
510  
511      qemu_input_queue_btn(scon->dcl.con, btn, true);
512      qemu_input_event_sync();
513      qemu_input_queue_btn(scon->dcl.con, btn, false);
514      qemu_input_event_sync();
515  }
516  
517  static void handle_windowevent(SDL_Event *ev)
518  {
519      struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
520      bool allow_close = true;
521  
522      if (!scon) {
523          return;
524      }
525  
526      switch (ev->window.event) {
527      case SDL_WINDOWEVENT_RESIZED:
528          {
529              QemuUIInfo info;
530              memset(&info, 0, sizeof(info));
531              info.width = ev->window.data1;
532              info.height = ev->window.data2;
533              dpy_set_ui_info(scon->dcl.con, &info);
534          }
535          sdl2_redraw(scon);
536          break;
537      case SDL_WINDOWEVENT_EXPOSED:
538          sdl2_redraw(scon);
539          break;
540      case SDL_WINDOWEVENT_FOCUS_GAINED:
541      case SDL_WINDOWEVENT_ENTER:
542          if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
543              absolute_mouse_grab(scon);
544          }
545          /* If a new console window opened using a hotkey receives the
546           * focus, SDL sends another KEYDOWN event to the new window,
547           * closing the console window immediately after.
548           *
549           * Work around this by ignoring further hotkey events until a
550           * key is released.
551           */
552          scon->ignore_hotkeys = get_mod_state();
553          break;
554      case SDL_WINDOWEVENT_FOCUS_LOST:
555          if (gui_grab && !gui_fullscreen) {
556              sdl_grab_end(scon);
557          }
558          break;
559      case SDL_WINDOWEVENT_RESTORED:
560          update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
561          break;
562      case SDL_WINDOWEVENT_MINIMIZED:
563          update_displaychangelistener(&scon->dcl, 500);
564          break;
565      case SDL_WINDOWEVENT_CLOSE:
566          if (qemu_console_is_graphic(scon->dcl.con)) {
567              if (scon->opts->has_window_close && !scon->opts->window_close) {
568                  allow_close = false;
569              }
570              if (allow_close) {
571                  no_shutdown = 0;
572                  qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
573              }
574          } else {
575              SDL_HideWindow(scon->real_window);
576              scon->hidden = true;
577          }
578          break;
579      case SDL_WINDOWEVENT_SHOWN:
580          scon->hidden = false;
581          break;
582      case SDL_WINDOWEVENT_HIDDEN:
583          scon->hidden = true;
584          break;
585      }
586  }
587  
588  void sdl2_poll_events(struct sdl2_console *scon)
589  {
590      SDL_Event ev1, *ev = &ev1;
591      bool allow_close = true;
592      int idle = 1;
593  
594      if (scon->last_vm_running != runstate_is_running()) {
595          scon->last_vm_running = runstate_is_running();
596          sdl_update_caption(scon);
597      }
598  
599      while (SDL_PollEvent(ev)) {
600          switch (ev->type) {
601          case SDL_KEYDOWN:
602              idle = 0;
603              handle_keydown(ev);
604              break;
605          case SDL_KEYUP:
606              idle = 0;
607              handle_keyup(ev);
608              break;
609          case SDL_TEXTINPUT:
610              idle = 0;
611              handle_textinput(ev);
612              break;
613          case SDL_QUIT:
614              if (scon->opts->has_window_close && !scon->opts->window_close) {
615                  allow_close = false;
616              }
617              if (allow_close) {
618                  no_shutdown = 0;
619                  qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
620              }
621              break;
622          case SDL_MOUSEMOTION:
623              idle = 0;
624              handle_mousemotion(ev);
625              break;
626          case SDL_MOUSEBUTTONDOWN:
627          case SDL_MOUSEBUTTONUP:
628              idle = 0;
629              handle_mousebutton(ev);
630              break;
631          case SDL_MOUSEWHEEL:
632              idle = 0;
633              handle_mousewheel(ev);
634              break;
635          case SDL_WINDOWEVENT:
636              handle_windowevent(ev);
637              break;
638          default:
639              break;
640          }
641      }
642  
643      if (idle) {
644          if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
645              scon->idle_counter++;
646              if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
647                  scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
648              }
649          }
650      } else {
651          scon->idle_counter = 0;
652          scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
653      }
654  }
655  
656  static void sdl_mouse_warp(DisplayChangeListener *dcl,
657                             int x, int y, int on)
658  {
659      struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
660  
661      if (!qemu_console_is_graphic(scon->dcl.con)) {
662          return;
663      }
664  
665      if (on) {
666          if (!guest_cursor) {
667              sdl_show_cursor();
668          }
669          if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
670              SDL_SetCursor(guest_sprite);
671              if (!qemu_input_is_absolute() && !absolute_enabled) {
672                  SDL_WarpMouseInWindow(scon->real_window, x, y);
673              }
674          }
675      } else if (gui_grab) {
676          sdl_hide_cursor();
677      }
678      guest_cursor = on;
679      guest_x = x, guest_y = y;
680  }
681  
682  static void sdl_mouse_define(DisplayChangeListener *dcl,
683                               QEMUCursor *c)
684  {
685  
686      if (guest_sprite) {
687          SDL_FreeCursor(guest_sprite);
688      }
689  
690      if (guest_sprite_surface) {
691          SDL_FreeSurface(guest_sprite_surface);
692      }
693  
694      guest_sprite_surface =
695          SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
696                                   0xff0000, 0x00ff00, 0xff, 0xff000000);
697  
698      if (!guest_sprite_surface) {
699          fprintf(stderr, "Failed to make rgb surface from %p\n", c);
700          return;
701      }
702      guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
703                                           c->hot_x, c->hot_y);
704      if (!guest_sprite) {
705          fprintf(stderr, "Failed to make color cursor from %p\n", c);
706          return;
707      }
708      if (guest_cursor &&
709          (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
710          SDL_SetCursor(guest_sprite);
711      }
712  }
713  
714  static void sdl_cleanup(void)
715  {
716      if (guest_sprite) {
717          SDL_FreeCursor(guest_sprite);
718      }
719      SDL_QuitSubSystem(SDL_INIT_VIDEO);
720  }
721  
722  static const DisplayChangeListenerOps dcl_2d_ops = {
723      .dpy_name             = "sdl2-2d",
724      .dpy_gfx_update       = sdl2_2d_update,
725      .dpy_gfx_switch       = sdl2_2d_switch,
726      .dpy_gfx_check_format = sdl2_2d_check_format,
727      .dpy_refresh          = sdl2_2d_refresh,
728      .dpy_mouse_set        = sdl_mouse_warp,
729      .dpy_cursor_define    = sdl_mouse_define,
730  };
731  
732  #ifdef CONFIG_OPENGL
733  static const DisplayChangeListenerOps dcl_gl_ops = {
734      .dpy_name                = "sdl2-gl",
735      .dpy_gfx_update          = sdl2_gl_update,
736      .dpy_gfx_switch          = sdl2_gl_switch,
737      .dpy_gfx_check_format    = console_gl_check_format,
738      .dpy_refresh             = sdl2_gl_refresh,
739      .dpy_mouse_set           = sdl_mouse_warp,
740      .dpy_cursor_define       = sdl_mouse_define,
741  
742      .dpy_gl_ctx_create       = sdl2_gl_create_context,
743      .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
744      .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
745      .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
746      .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
747      .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
748      .dpy_gl_update           = sdl2_gl_scanout_flush,
749  };
750  #endif
751  
752  static void sdl2_display_early_init(DisplayOptions *o)
753  {
754      assert(o->type == DISPLAY_TYPE_SDL);
755      if (o->has_gl && o->gl) {
756  #ifdef CONFIG_OPENGL
757          display_opengl = 1;
758  #endif
759      }
760  }
761  
762  static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
763  {
764      uint8_t data = 0;
765      char *filename;
766      int i;
767      SDL_SysWMinfo info;
768  
769      assert(o->type == DISPLAY_TYPE_SDL);
770  
771  #ifdef __linux__
772      /* on Linux, SDL may use fbcon|directfb|svgalib when run without
773       * accessible $DISPLAY to open X11 window.  This is often the case
774       * when qemu is run using sudo.  But in this case, and when actually
775       * run in X11 environment, SDL fights with X11 for the video card,
776       * making current display unavailable, often until reboot.
777       * So make x11 the default SDL video driver if this variable is unset.
778       * This is a bit hackish but saves us from bigger problem.
779       * Maybe it's a good idea to fix this in SDL instead.
780       */
781      setenv("SDL_VIDEODRIVER", "x11", 0);
782  #endif
783  
784      if (SDL_Init(SDL_INIT_VIDEO)) {
785          fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
786                  SDL_GetError());
787          exit(1);
788      }
789  #ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR /* only available since SDL 2.0.8 */
790      SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
791  #endif
792      SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
793      memset(&info, 0, sizeof(info));
794      SDL_VERSION(&info.version);
795  
796      gui_fullscreen = o->has_full_screen && o->full_screen;
797  
798      for (i = 0;; i++) {
799          QemuConsole *con = qemu_console_lookup_by_index(i);
800          if (!con) {
801              break;
802          }
803      }
804      sdl2_num_outputs = i;
805      if (sdl2_num_outputs == 0) {
806          return;
807      }
808      sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
809      for (i = 0; i < sdl2_num_outputs; i++) {
810          QemuConsole *con = qemu_console_lookup_by_index(i);
811          assert(con != NULL);
812          if (!qemu_console_is_graphic(con) &&
813              qemu_console_get_index(con) != 0) {
814              sdl2_console[i].hidden = true;
815          }
816          sdl2_console[i].idx = i;
817          sdl2_console[i].opts = o;
818  #ifdef CONFIG_OPENGL
819          sdl2_console[i].opengl = display_opengl;
820          sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
821  #else
822          sdl2_console[i].opengl = 0;
823          sdl2_console[i].dcl.ops = &dcl_2d_ops;
824  #endif
825          sdl2_console[i].dcl.con = con;
826          register_displaychangelistener(&sdl2_console[i].dcl);
827  
828  #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
829          if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
830  #if defined(SDL_VIDEO_DRIVER_WINDOWS)
831              qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
832  #elif defined(SDL_VIDEO_DRIVER_X11)
833              qemu_console_set_window_id(con, info.info.x11.window);
834  #endif
835          }
836  #endif
837      }
838  
839      /* Load a 32x32x4 image. White pixels are transparent. */
840      filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
841      if (filename) {
842          SDL_Surface *image = SDL_LoadBMP(filename);
843          if (image) {
844              uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
845              SDL_SetColorKey(image, SDL_TRUE, colorkey);
846              SDL_SetWindowIcon(sdl2_console[0].real_window, image);
847          }
848          g_free(filename);
849      }
850  
851      gui_grab = 0;
852      if (gui_fullscreen) {
853          sdl_grab_start(0);
854      }
855  
856      mouse_mode_notifier.notify = sdl_mouse_mode_change;
857      qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
858  
859      sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
860      sdl_cursor_normal = SDL_GetCursor();
861  
862      atexit(sdl_cleanup);
863  }
864  
865  static QemuDisplay qemu_display_sdl2 = {
866      .type       = DISPLAY_TYPE_SDL,
867      .early_init = sdl2_display_early_init,
868      .init       = sdl2_display_init,
869  };
870  
871  static void register_sdl1(void)
872  {
873      qemu_display_register(&qemu_display_sdl2);
874  }
875  
876  type_init(register_sdl1);
877