ui/sdl2.c

   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-common.h"
  27 #include "ui/console.h"
  28 #include "ui/input.h"
  29 #include "ui/sdl2.h"
  30 #include "sysemu/sysemu.h"
  31
  32 static int sdl2_num_outputs;
  33 static struct sdl2_console *sdl2_console;
  34
  35 static SDL_Surface *guest_sprite_surface;
  36 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  37
  38 static int gui_saved_grab;
  39 static int gui_fullscreen;
  40 static int gui_noframe;
  41 static int gui_key_modifier_pressed;
  42 static int gui_keysym;
  43 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  44 static SDL_Cursor *sdl_cursor_normal;
  45 static SDL_Cursor *sdl_cursor_hidden;
  46 static int absolute_enabled;
  47 static int guest_cursor;
  48 static int guest_x, guest_y;
  49 static SDL_Cursor *guest_sprite;
  50 static Notifier mouse_mode_notifier;
  51
  52 static void sdl_update_caption(struct sdl2_console *scon);
  53
  54 static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  55 {
  56     int i;
  57     for (i = 0; i < sdl2_num_outputs; i++) {
  58         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  59             return &sdl2_console[i];
  60         }
  61     }
  62     return NULL;
  63 }
  64
  65 void sdl2_window_create(struct sdl2_console *scon)
  66 {
  67     int flags = 0;
  68
  69     if (!scon->surface) {
  70         return;
  71     }
  72     assert(!scon->real_window);
  73
  74     if (gui_fullscreen) {
  75         flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  76     } else {
  77         flags |= SDL_WINDOW_RESIZABLE;
  78     }
  79     if (scon->hidden) {
  80         flags |= SDL_WINDOW_HIDDEN;
  81     }
  82
  83     scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  84                                          SDL_WINDOWPOS_UNDEFINED,
  85                                          surface_width(scon->surface),
  86                                          surface_height(scon->surface),
  87                                          flags);
  88     scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  89     if (scon->opengl) {
  90         scon->winctx = SDL_GL_GetCurrentContext();
  91     }
  92     sdl_update_caption(scon);
  93 }
  94
  95 void sdl2_window_destroy(struct sdl2_console *scon)
  96 {
  97     if (!scon->real_window) {
  98         return;
  99     }
 100
 101     SDL_DestroyRenderer(scon->real_renderer);
 102     scon->real_renderer = NULL;
 103     SDL_DestroyWindow(scon->real_window);
 104     scon->real_window = NULL;
 105 }
 106
 107 void sdl2_window_resize(struct sdl2_console *scon)
 108 {
 109     if (!scon->real_window) {
 110         return;
 111     }
 112
 113     SDL_SetWindowSize(scon->real_window,
 114                       surface_width(scon->surface),
 115                       surface_height(scon->surface));
 116 }
 117
 118 static void sdl2_redraw(struct sdl2_console *scon)
 119 {
 120     if (scon->opengl) {
 121 #ifdef CONFIG_OPENGL
 122         sdl2_gl_redraw(scon);
 123 #endif
 124     } else {
 125         sdl2_2d_redraw(scon);
 126     }
 127 }
 128
 129 static void sdl_update_caption(struct sdl2_console *scon)
 130 {
 131     char win_title[1024];
 132     char icon_title[1024];
 133     const char *status = "";
 134
 135     if (!runstate_is_running()) {
 136         status = " [Stopped]";
 137     } else if (gui_grab) {
 138         if (alt_grab) {
 139             status = " - Press Ctrl-Alt-Shift to exit grab";
 140         } else if (ctrl_grab) {
 141             status = " - Press Right-Ctrl to exit grab";
 142         } else {
 143             status = " - Press Ctrl-Alt to exit grab";
 144         }
 145     }
 146
 147     if (qemu_name) {
 148         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 149                  scon->idx, status);
 150         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 151     } else {
 152         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 153         snprintf(icon_title, sizeof(icon_title), "QEMU");
 154     }
 155
 156     if (scon->real_window) {
 157         SDL_SetWindowTitle(scon->real_window, win_title);
 158     }
 159 }
 160
 161 static void sdl_hide_cursor(void)
 162 {
 163     if (!cursor_hide) {
 164         return;
 165     }
 166
 167     if (qemu_input_is_absolute()) {
 168         SDL_ShowCursor(1);
 169         SDL_SetCursor(sdl_cursor_hidden);
 170     } else {
 171         SDL_SetRelativeMouseMode(SDL_TRUE);
 172     }
 173 }
 174
 175 static void sdl_show_cursor(void)
 176 {
 177     if (!cursor_hide) {
 178         return;
 179     }
 180
 181     if (!qemu_input_is_absolute()) {
 182         SDL_SetRelativeMouseMode(SDL_FALSE);
 183         SDL_ShowCursor(1);
 184         if (guest_cursor &&
 185             (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 186             SDL_SetCursor(guest_sprite);
 187         } else {
 188             SDL_SetCursor(sdl_cursor_normal);
 189         }
 190     }
 191 }
 192
 193 static void sdl_grab_start(struct sdl2_console *scon)
 194 {
 195     QemuConsole *con = scon ? scon->dcl.con : NULL;
 196
 197     if (!con || !qemu_console_is_graphic(con)) {
 198         return;
 199     }
 200     /*
 201      * If the application is not active, do not try to enter grab state. This
 202      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 203      * application (SDL bug).
 204      */
 205     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 206         return;
 207     }
 208     if (guest_cursor) {
 209         SDL_SetCursor(guest_sprite);
 210         if (!qemu_input_is_absolute() && !absolute_enabled) {
 211             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 212         }
 213     } else {
 214         sdl_hide_cursor();
 215     }
 216     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 217     gui_grab = 1;
 218     sdl_update_caption(scon);
 219 }
 220
 221 static void sdl_grab_end(struct sdl2_console *scon)
 222 {
 223     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 224     gui_grab = 0;
 225     sdl_show_cursor();
 226     sdl_update_caption(scon);
 227 }
 228
 229 static void absolute_mouse_grab(struct sdl2_console *scon)
 230 {
 231     int mouse_x, mouse_y;
 232     int scr_w, scr_h;
 233     SDL_GetMouseState(&mouse_x, &mouse_y);
 234     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 235     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 236         mouse_y > 0 && mouse_y < scr_h - 1) {
 237         sdl_grab_start(scon);
 238     }
 239 }
 240
 241 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 242 {
 243     if (qemu_input_is_absolute()) {
 244         if (!absolute_enabled) {
 245             absolute_enabled = 1;
 246             absolute_mouse_grab(&sdl2_console[0]);
 247         }
 248     } else if (absolute_enabled) {
 249         if (!gui_fullscreen) {
 250             sdl_grab_end(&sdl2_console[0]);
 251         }
 252         absolute_enabled = 0;
 253     }
 254 }
 255
 256 static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 257                                  int x, int y, int state)
 258 {
 259     static uint32_t bmap[INPUT_BUTTON__MAX] = {
 260         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 261         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 262         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 263     };
 264     static uint32_t prev_state;
 265
 266     if (prev_state != state) {
 267         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 268         prev_state = state;
 269     }
 270
 271     if (qemu_input_is_absolute()) {
 272         int scr_w, scr_h;
 273         int max_w = 0, max_h = 0;
 274         int off_x = 0, off_y = 0;
 275         int cur_off_x = 0, cur_off_y = 0;
 276         int i;
 277
 278         for (i = 0; i < sdl2_num_outputs; i++) {
 279             struct sdl2_console *thiscon = &sdl2_console[i];
 280             if (thiscon->real_window && thiscon->surface) {
 281                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 282                 cur_off_x = thiscon->x;
 283                 cur_off_y = thiscon->y;
 284                 if (scr_w + cur_off_x > max_w) {
 285                     max_w = scr_w + cur_off_x;
 286                 }
 287                 if (scr_h + cur_off_y > max_h) {
 288                     max_h = scr_h + cur_off_y;
 289                 }
 290                 if (i == scon->idx) {
 291                     off_x = cur_off_x;
 292                     off_y = cur_off_y;
 293                 }
 294             }
 295         }
 296         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 297         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 298     } else {
 299         if (guest_cursor) {
 300             x -= guest_x;
 301             y -= guest_y;
 302             guest_x += x;
 303             guest_y += y;
 304             dx = x;
 305             dy = y;
 306         }
 307         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 308         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 309     }
 310     qemu_input_event_sync();
 311 }
 312
 313 static void toggle_full_screen(struct sdl2_console *scon)
 314 {
 315     gui_fullscreen = !gui_fullscreen;
 316     if (gui_fullscreen) {
 317         SDL_SetWindowFullscreen(scon->real_window,
 318                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 319         gui_saved_grab = gui_grab;
 320         sdl_grab_start(scon);
 321     } else {
 322         if (!gui_saved_grab) {
 323             sdl_grab_end(scon);
 324         }
 325         SDL_SetWindowFullscreen(scon->real_window, 0);
 326     }
 327     sdl2_redraw(scon);
 328 }
 329
 330 static void handle_keydown(SDL_Event *ev)
 331 {
 332     int mod_state, win;
 333     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 334
 335     if (alt_grab) {
 336         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 337             (gui_grab_code | KMOD_LSHIFT);
 338     } else if (ctrl_grab) {
 339         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 340     } else {
 341         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 342     }
 343     gui_key_modifier_pressed = mod_state;
 344
 345     if (gui_key_modifier_pressed) {
 346         switch (ev->key.keysym.scancode) {
 347         case SDL_SCANCODE_2:
 348         case SDL_SCANCODE_3:
 349         case SDL_SCANCODE_4:
 350         case SDL_SCANCODE_5:
 351         case SDL_SCANCODE_6:
 352         case SDL_SCANCODE_7:
 353         case SDL_SCANCODE_8:
 354         case SDL_SCANCODE_9:
 355             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 356             if (win < sdl2_num_outputs) {
 357                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 358                 if (sdl2_console[win].real_window) {
 359                     if (sdl2_console[win].hidden) {
 360                         SDL_HideWindow(sdl2_console[win].real_window);
 361                     } else {
 362                         SDL_ShowWindow(sdl2_console[win].real_window);
 363                     }
 364                 }
 365                 gui_keysym = 1;
 366             }
 367             break;
 368         case SDL_SCANCODE_F:
 369             toggle_full_screen(scon);
 370             gui_keysym = 1;
 371             break;
 372         case SDL_SCANCODE_U:
 373             sdl2_window_destroy(scon);
 374             sdl2_window_create(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     int mod_state;
 413     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 414
 415     if (!alt_grab) {
 416         mod_state = (ev->key.keysym.mod & gui_grab_code);
 417     } else {
 418         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 419     }
 420     if (!mod_state && gui_key_modifier_pressed) {
 421         gui_key_modifier_pressed = 0;
 422         if (gui_keysym == 0) {
 423             /* exit/enter grab if pressing Ctrl-Alt */
 424             if (!gui_grab) {
 425                 sdl_grab_start(scon);
 426             } else if (!gui_fullscreen) {
 427                 sdl_grab_end(scon);
 428             }
 429             /* SDL does not send back all the modifiers key, so we must
 430              * correct it. */
 431             sdl2_reset_keys(scon);
 432             return;
 433         }
 434         gui_keysym = 0;
 435     }
 436     if (!gui_keysym) {
 437         sdl2_process_key(scon, &ev->key);
 438     }
 439 }
 440
 441 static void handle_textinput(SDL_Event *ev)
 442 {
 443     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 444     QemuConsole *con = scon ? scon->dcl.con : NULL;
 445
 446     if (qemu_console_is_graphic(con)) {
 447         return;
 448     }
 449     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 450 }
 451
 452 static void handle_mousemotion(SDL_Event *ev)
 453 {
 454     int max_x, max_y;
 455     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 456
 457     if (qemu_input_is_absolute() || absolute_enabled) {
 458         int scr_w, scr_h;
 459         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 460         max_x = scr_w - 1;
 461         max_y = scr_h - 1;
 462         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 463                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 464             sdl_grab_end(scon);
 465         }
 466         if (!gui_grab &&
 467             (ev->motion.x > 0 && ev->motion.x < max_x &&
 468              ev->motion.y > 0 && ev->motion.y < max_y)) {
 469             sdl_grab_start(scon);
 470         }
 471     }
 472     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 473         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 474                              ev->motion.x, ev->motion.y, ev->motion.state);
 475     }
 476 }
 477
 478 static void handle_mousebutton(SDL_Event *ev)
 479 {
 480     int buttonstate = SDL_GetMouseState(NULL, NULL);
 481     SDL_MouseButtonEvent *bev;
 482     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 483
 484     bev = &ev->button;
 485     if (!gui_grab && !qemu_input_is_absolute()) {
 486         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 487             /* start grabbing all events */
 488             sdl_grab_start(scon);
 489         }
 490     } else {
 491         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 492             buttonstate |= SDL_BUTTON(bev->button);
 493         } else {
 494             buttonstate &= ~SDL_BUTTON(bev->button);
 495         }
 496         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 497     }
 498 }
 499
 500 static void handle_mousewheel(SDL_Event *ev)
 501 {
 502     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 503     SDL_MouseWheelEvent *wev = &ev->wheel;
 504     InputButton btn;
 505
 506     if (wev->y > 0) {
 507         btn = INPUT_BUTTON_WHEELUP;
 508     } else if (wev->y < 0) {
 509         btn = INPUT_BUTTON_WHEELDOWN;
 510     } else {
 511         return;
 512     }
 513
 514     qemu_input_queue_btn(scon->dcl.con, btn, true);
 515     qemu_input_event_sync();
 516     qemu_input_queue_btn(scon->dcl.con, btn, false);
 517     qemu_input_event_sync();
 518 }
 519
 520 static void handle_windowevent(SDL_Event *ev)
 521 {
 522     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 523
 524     if (!scon) {
 525         return;
 526     }
 527
 528     switch (ev->window.event) {
 529     case SDL_WINDOWEVENT_RESIZED:
 530         {
 531             QemuUIInfo info;
 532             memset(&info, 0, sizeof(info));
 533             info.width = ev->window.data1;
 534             info.height = ev->window.data2;
 535             dpy_set_ui_info(scon->dcl.con, &info);
 536         }
 537         sdl2_redraw(scon);
 538         break;
 539     case SDL_WINDOWEVENT_EXPOSED:
 540         sdl2_redraw(scon);
 541         break;
 542     case SDL_WINDOWEVENT_FOCUS_GAINED:
 543     case SDL_WINDOWEVENT_ENTER:
 544         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 545             absolute_mouse_grab(scon);
 546         }
 547         break;
 548     case SDL_WINDOWEVENT_FOCUS_LOST:
 549         if (gui_grab && !gui_fullscreen) {
 550             sdl_grab_end(scon);
 551         }
 552         break;
 553     case SDL_WINDOWEVENT_RESTORED:
 554         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 555         break;
 556     case SDL_WINDOWEVENT_MINIMIZED:
 557         update_displaychangelistener(&scon->dcl, 500);
 558         break;
 559     case SDL_WINDOWEVENT_CLOSE:
 560         if (!no_quit) {
 561             no_shutdown = 0;
 562             qemu_system_shutdown_request();
 563         }
 564         break;
 565     case SDL_WINDOWEVENT_SHOWN:
 566         if (scon->hidden) {
 567             SDL_HideWindow(scon->real_window);
 568         }
 569         break;
 570     case SDL_WINDOWEVENT_HIDDEN:
 571         if (!scon->hidden) {
 572             SDL_ShowWindow(scon->real_window);
 573         }
 574         break;
 575     }
 576 }
 577
 578 void sdl2_poll_events(struct sdl2_console *scon)
 579 {
 580     SDL_Event ev1, *ev = &ev1;
 581
 582     if (scon->last_vm_running != runstate_is_running()) {
 583         scon->last_vm_running = runstate_is_running();
 584         sdl_update_caption(scon);
 585     }
 586
 587     while (SDL_PollEvent(ev)) {
 588         switch (ev->type) {
 589         case SDL_KEYDOWN:
 590             handle_keydown(ev);
 591             break;
 592         case SDL_KEYUP:
 593             handle_keyup(ev);
 594             break;
 595         case SDL_TEXTINPUT:
 596             handle_textinput(ev);
 597             break;
 598         case SDL_QUIT:
 599             if (!no_quit) {
 600                 no_shutdown = 0;
 601                 qemu_system_shutdown_request();
 602             }
 603             break;
 604         case SDL_MOUSEMOTION:
 605             handle_mousemotion(ev);
 606             break;
 607         case SDL_MOUSEBUTTONDOWN:
 608         case SDL_MOUSEBUTTONUP:
 609             handle_mousebutton(ev);
 610             break;
 611         case SDL_MOUSEWHEEL:
 612             handle_mousewheel(ev);
 613             break;
 614         case SDL_WINDOWEVENT:
 615             handle_windowevent(ev);
 616             break;
 617         default:
 618             break;
 619         }
 620     }
 621 }
 622
 623 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 624                            int x, int y, int on)
 625 {
 626     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 627     if (on) {
 628         if (!guest_cursor) {
 629             sdl_show_cursor();
 630         }
 631         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 632             SDL_SetCursor(guest_sprite);
 633             if (!qemu_input_is_absolute() && !absolute_enabled) {
 634                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 635             }
 636         }
 637     } else if (gui_grab) {
 638         sdl_hide_cursor();
 639     }
 640     guest_cursor = on;
 641     guest_x = x, guest_y = y;
 642 }
 643
 644 static void sdl_mouse_define(DisplayChangeListener *dcl,
 645                              QEMUCursor *c)
 646 {
 647
 648     if (guest_sprite) {
 649         SDL_FreeCursor(guest_sprite);
 650     }
 651
 652     if (guest_sprite_surface) {
 653         SDL_FreeSurface(guest_sprite_surface);
 654     }
 655
 656     guest_sprite_surface =
 657         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 658                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 659
 660     if (!guest_sprite_surface) {
 661         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 662         return;
 663     }
 664     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 665                                          c->hot_x, c->hot_y);
 666     if (!guest_sprite) {
 667         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 668         return;
 669     }
 670     if (guest_cursor &&
 671         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 672         SDL_SetCursor(guest_sprite);
 673     }
 674 }
 675
 676 static void sdl_cleanup(void)
 677 {
 678     if (guest_sprite) {
 679         SDL_FreeCursor(guest_sprite);
 680     }
 681     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 682 }
 683
 684 static const DisplayChangeListenerOps dcl_2d_ops = {
 685     .dpy_name             = "sdl2-2d",
 686     .dpy_gfx_update       = sdl2_2d_update,
 687     .dpy_gfx_switch       = sdl2_2d_switch,
 688     .dpy_gfx_check_format = sdl2_2d_check_format,
 689     .dpy_refresh          = sdl2_2d_refresh,
 690     .dpy_mouse_set        = sdl_mouse_warp,
 691     .dpy_cursor_define    = sdl_mouse_define,
 692 };
 693
 694 #ifdef CONFIG_OPENGL
 695 static const DisplayChangeListenerOps dcl_gl_ops = {
 696     .dpy_name                = "sdl2-gl",
 697     .dpy_gfx_update          = sdl2_gl_update,
 698     .dpy_gfx_switch          = sdl2_gl_switch,
 699     .dpy_gfx_check_format    = console_gl_check_format,
 700     .dpy_refresh             = sdl2_gl_refresh,
 701     .dpy_mouse_set           = sdl_mouse_warp,
 702     .dpy_cursor_define       = sdl_mouse_define,
 703
 704     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 705     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 706     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 707     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 708     .dpy_gl_scanout          = sdl2_gl_scanout,
 709     .dpy_gl_update           = sdl2_gl_scanout_flush,
 710 };
 711 #endif
 712
 713 void sdl_display_early_init(int opengl)
 714 {
 715     switch (opengl) {
 716     case -1: /* default */
 717     case 0:  /* off */
 718         break;
 719     case 1: /* on */
 720 #ifdef CONFIG_OPENGL
 721         display_opengl = 1;
 722 #endif
 723         break;
 724     default:
 725         g_assert_not_reached();
 726         break;
 727     }
 728 }
 729
 730 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 731 {
 732     int flags;
 733     uint8_t data = 0;
 734     char *filename;
 735     int i;
 736
 737     if (no_frame) {
 738         gui_noframe = 1;
 739     }
 740
 741 #ifdef __linux__
 742     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 743      * accessible $DISPLAY to open X11 window.  This is often the case
 744      * when qemu is run using sudo.  But in this case, and when actually
 745      * run in X11 environment, SDL fights with X11 for the video card,
 746      * making current display unavailable, often until reboot.
 747      * So make x11 the default SDL video driver if this variable is unset.
 748      * This is a bit hackish but saves us from bigger problem.
 749      * Maybe it's a good idea to fix this in SDL instead.
 750      */
 751     setenv("SDL_VIDEODRIVER", "x11", 0);
 752 #endif
 753
 754     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 755     if (SDL_Init(flags)) {
 756         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 757                 SDL_GetError());
 758         exit(1);
 759     }
 760     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 761
 762     for (i = 0;; i++) {
 763         QemuConsole *con = qemu_console_lookup_by_index(i);
 764         if (!con) {
 765             break;
 766         }
 767     }
 768     sdl2_num_outputs = i;
 769     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 770     for (i = 0; i < sdl2_num_outputs; i++) {
 771         QemuConsole *con = qemu_console_lookup_by_index(i);
 772         if (!qemu_console_is_graphic(con)) {
 773             sdl2_console[i].hidden = true;
 774         }
 775         sdl2_console[i].idx = i;
 776 #ifdef CONFIG_OPENGL
 777         sdl2_console[i].opengl = display_opengl;
 778         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 779 #else
 780         sdl2_console[i].opengl = 0;
 781         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 782 #endif
 783         sdl2_console[i].dcl.con = con;
 784         register_displaychangelistener(&sdl2_console[i].dcl);
 785     }
 786
 787     /* Load a 32x32x4 image. White pixels are transparent. */
 788     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 789     if (filename) {
 790         SDL_Surface *image = SDL_LoadBMP(filename);
 791         if (image) {
 792             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 793             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 794             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 795         }
 796         g_free(filename);
 797     }
 798
 799     if (full_screen) {
 800         gui_fullscreen = 1;
 801         sdl_grab_start(0);
 802     }
 803
 804     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 805     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 806
 807     gui_grab = 0;
 808
 809     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 810     sdl_cursor_normal = SDL_GetCursor();
 811
 812     atexit(sdl_cleanup);
 813 }