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/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_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 #define SDL2_REFRESH_INTERVAL_BUSY 10
  53 #define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  54                              / SDL2_REFRESH_INTERVAL_BUSY + 1)
  55
  56 static void sdl_update_caption(struct sdl2_console *scon);
  57
  58 static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  59 {
  60     int i;
  61     for (i = 0; i < sdl2_num_outputs; i++) {
  62         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  63             return &sdl2_console[i];
  64         }
  65     }
  66     return NULL;
  67 }
  68
  69 void sdl2_window_create(struct sdl2_console *scon)
  70 {
  71     int flags = 0;
  72
  73     if (!scon->surface) {
  74         return;
  75     }
  76     assert(!scon->real_window);
  77
  78     if (gui_fullscreen) {
  79         flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  80     } else {
  81         flags |= SDL_WINDOW_RESIZABLE;
  82     }
  83     if (scon->hidden) {
  84         flags |= SDL_WINDOW_HIDDEN;
  85     }
  86
  87     scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  88                                          SDL_WINDOWPOS_UNDEFINED,
  89                                          surface_width(scon->surface),
  90                                          surface_height(scon->surface),
  91                                          flags);
  92     scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  93     if (scon->opengl) {
  94         scon->winctx = SDL_GL_GetCurrentContext();
  95     }
  96     sdl_update_caption(scon);
  97 }
  98
  99 void sdl2_window_destroy(struct sdl2_console *scon)
 100 {
 101     if (!scon->real_window) {
 102         return;
 103     }
 104
 105     SDL_DestroyRenderer(scon->real_renderer);
 106     scon->real_renderer = NULL;
 107     SDL_DestroyWindow(scon->real_window);
 108     scon->real_window = NULL;
 109 }
 110
 111 void sdl2_window_resize(struct sdl2_console *scon)
 112 {
 113     if (!scon->real_window) {
 114         return;
 115     }
 116
 117     SDL_SetWindowSize(scon->real_window,
 118                       surface_width(scon->surface),
 119                       surface_height(scon->surface));
 120 }
 121
 122 static void sdl2_redraw(struct sdl2_console *scon)
 123 {
 124     if (scon->opengl) {
 125 #ifdef CONFIG_OPENGL
 126         sdl2_gl_redraw(scon);
 127 #endif
 128     } else {
 129         sdl2_2d_redraw(scon);
 130     }
 131 }
 132
 133 static void sdl_update_caption(struct sdl2_console *scon)
 134 {
 135     char win_title[1024];
 136     char icon_title[1024];
 137     const char *status = "";
 138
 139     if (!runstate_is_running()) {
 140         status = " [Stopped]";
 141     } else if (gui_grab) {
 142         if (alt_grab) {
 143             status = " - Press Ctrl-Alt-Shift-G to exit grab";
 144         } else if (ctrl_grab) {
 145             status = " - Press Right-Ctrl-G to exit grab";
 146         } else {
 147             status = " - Press Ctrl-Alt-G to exit grab";
 148         }
 149     }
 150
 151     if (qemu_name) {
 152         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 153                  scon->idx, status);
 154         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 155     } else {
 156         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 157         snprintf(icon_title, sizeof(icon_title), "QEMU");
 158     }
 159
 160     if (scon->real_window) {
 161         SDL_SetWindowTitle(scon->real_window, win_title);
 162     }
 163 }
 164
 165 static void sdl_hide_cursor(void)
 166 {
 167     if (!cursor_hide) {
 168         return;
 169     }
 170
 171     SDL_ShowCursor(SDL_DISABLE);
 172     SDL_SetCursor(sdl_cursor_hidden);
 173
 174     if (!qemu_input_is_absolute()) {
 175         SDL_SetRelativeMouseMode(SDL_TRUE);
 176     }
 177 }
 178
 179 static void sdl_show_cursor(void)
 180 {
 181     if (!cursor_hide) {
 182         return;
 183     }
 184
 185     if (!qemu_input_is_absolute()) {
 186         SDL_SetRelativeMouseMode(SDL_FALSE);
 187     }
 188
 189     if (guest_cursor &&
 190         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 191         SDL_SetCursor(guest_sprite);
 192     } else {
 193         SDL_SetCursor(sdl_cursor_normal);
 194     }
 195
 196     SDL_ShowCursor(SDL_ENABLE);
 197 }
 198
 199 static void sdl_grab_start(struct sdl2_console *scon)
 200 {
 201     QemuConsole *con = scon ? scon->dcl.con : NULL;
 202
 203     if (!con || !qemu_console_is_graphic(con)) {
 204         return;
 205     }
 206     /*
 207      * If the application is not active, do not try to enter grab state. This
 208      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 209      * application (SDL bug).
 210      */
 211     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 212         return;
 213     }
 214     if (guest_cursor) {
 215         SDL_SetCursor(guest_sprite);
 216         if (!qemu_input_is_absolute() && !absolute_enabled) {
 217             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 218         }
 219     } else {
 220         sdl_hide_cursor();
 221     }
 222     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 223     gui_grab = 1;
 224     sdl_update_caption(scon);
 225 }
 226
 227 static void sdl_grab_end(struct sdl2_console *scon)
 228 {
 229     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 230     gui_grab = 0;
 231     sdl_show_cursor();
 232     sdl_update_caption(scon);
 233 }
 234
 235 static void absolute_mouse_grab(struct sdl2_console *scon)
 236 {
 237     int mouse_x, mouse_y;
 238     int scr_w, scr_h;
 239     SDL_GetMouseState(&mouse_x, &mouse_y);
 240     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 241     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 242         mouse_y > 0 && mouse_y < scr_h - 1) {
 243         sdl_grab_start(scon);
 244     }
 245 }
 246
 247 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 248 {
 249     if (qemu_input_is_absolute()) {
 250         if (!absolute_enabled) {
 251             absolute_enabled = 1;
 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
 333     gui_key_modifier_pressed = get_mod_state();
 334
 335     if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
 336         switch (ev->key.keysym.scancode) {
 337         case SDL_SCANCODE_2:
 338         case SDL_SCANCODE_3:
 339         case SDL_SCANCODE_4:
 340         case SDL_SCANCODE_5:
 341         case SDL_SCANCODE_6:
 342         case SDL_SCANCODE_7:
 343         case SDL_SCANCODE_8:
 344         case SDL_SCANCODE_9:
 345             if (gui_grab) {
 346                 sdl_grab_end(scon);
 347             }
 348
 349             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 350             if (win < sdl2_num_outputs) {
 351                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 352                 if (sdl2_console[win].real_window) {
 353                     if (sdl2_console[win].hidden) {
 354                         SDL_HideWindow(sdl2_console[win].real_window);
 355                     } else {
 356                         SDL_ShowWindow(sdl2_console[win].real_window);
 357                     }
 358                 }
 359                 gui_keysym = 1;
 360             }
 361             break;
 362         case SDL_SCANCODE_F:
 363             toggle_full_screen(scon);
 364             gui_keysym = 1;
 365             break;
 366         case SDL_SCANCODE_G:
 367             gui_keysym = 1;
 368             if (!gui_grab) {
 369                 sdl_grab_start(scon);
 370             } else if (!gui_fullscreen) {
 371                 sdl_grab_end(scon);
 372             }
 373             break;
 374         case SDL_SCANCODE_U:
 375             sdl2_window_destroy(scon);
 376             sdl2_window_create(scon);
 377             if (!scon->opengl) {
 378                 /* re-create scon->texture */
 379                 sdl2_2d_switch(&scon->dcl, scon->surface);
 380             }
 381             gui_keysym = 1;
 382             break;
 383 #if 0
 384         case SDL_SCANCODE_KP_PLUS:
 385         case SDL_SCANCODE_KP_MINUS:
 386             if (!gui_fullscreen) {
 387                 int scr_w, scr_h;
 388                 int width, height;
 389                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 390
 391                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 392                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 393                             160);
 394                 height = (surface_height(scon->surface) * width) /
 395                     surface_width(scon->surface);
 396                 fprintf(stderr, "%s: scale to %dx%d\n",
 397                         __func__, width, height);
 398                 sdl_scale(scon, width, height);
 399                 sdl2_redraw(scon);
 400                 gui_keysym = 1;
 401             }
 402 #endif
 403         default:
 404             break;
 405         }
 406     }
 407     if (!gui_keysym) {
 408         sdl2_process_key(scon, &ev->key);
 409     }
 410 }
 411
 412 static void handle_keyup(SDL_Event *ev)
 413 {
 414     int mod_state;
 415     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 416
 417     scon->ignore_hotkeys = false;
 418
 419     if (!alt_grab) {
 420         mod_state = (ev->key.keysym.mod & gui_grab_code);
 421     } else {
 422         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 423     }
 424     if (!mod_state && gui_key_modifier_pressed) {
 425         gui_key_modifier_pressed = 0;
 426         gui_keysym = 0;
 427     }
 428     if (!gui_keysym) {
 429         sdl2_process_key(scon, &ev->key);
 430     }
 431 }
 432
 433 static void handle_textinput(SDL_Event *ev)
 434 {
 435     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 436     QemuConsole *con = scon ? scon->dcl.con : NULL;
 437
 438     if (qemu_console_is_graphic(con)) {
 439         return;
 440     }
 441     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 442 }
 443
 444 static void handle_mousemotion(SDL_Event *ev)
 445 {
 446     int max_x, max_y;
 447     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 448
 449     if (!qemu_console_is_graphic(scon->dcl.con)) {
 450         return;
 451     }
 452
 453     if (qemu_input_is_absolute() || absolute_enabled) {
 454         int scr_w, scr_h;
 455         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 456         max_x = scr_w - 1;
 457         max_y = scr_h - 1;
 458         if (gui_grab && !gui_fullscreen
 459             && (ev->motion.x == 0 || ev->motion.y == 0 ||
 460                 ev->motion.x == max_x || ev->motion.y == max_y)) {
 461             sdl_grab_end(scon);
 462         }
 463         if (!gui_grab &&
 464             (ev->motion.x > 0 && ev->motion.x < max_x &&
 465              ev->motion.y > 0 && ev->motion.y < max_y)) {
 466             sdl_grab_start(scon);
 467         }
 468     }
 469     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 470         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 471                              ev->motion.x, ev->motion.y, ev->motion.state);
 472     }
 473 }
 474
 475 static void handle_mousebutton(SDL_Event *ev)
 476 {
 477     int buttonstate = SDL_GetMouseState(NULL, NULL);
 478     SDL_MouseButtonEvent *bev;
 479     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 480
 481     if (!qemu_console_is_graphic(scon->dcl.con)) {
 482         return;
 483     }
 484
 485     bev = &ev->button;
 486     if (!gui_grab && !qemu_input_is_absolute()) {
 487         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 488             /* start grabbing all events */
 489             sdl_grab_start(scon);
 490         }
 491     } else {
 492         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 493             buttonstate |= SDL_BUTTON(bev->button);
 494         } else {
 495             buttonstate &= ~SDL_BUTTON(bev->button);
 496         }
 497         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 498     }
 499 }
 500
 501 static void handle_mousewheel(SDL_Event *ev)
 502 {
 503     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 504     SDL_MouseWheelEvent *wev = &ev->wheel;
 505     InputButton btn;
 506
 507     if (!qemu_console_is_graphic(scon->dcl.con)) {
 508         return;
 509     }
 510
 511     if (wev->y > 0) {
 512         btn = INPUT_BUTTON_WHEEL_UP;
 513     } else if (wev->y < 0) {
 514         btn = INPUT_BUTTON_WHEEL_DOWN;
 515     } else {
 516         return;
 517     }
 518
 519     qemu_input_queue_btn(scon->dcl.con, btn, true);
 520     qemu_input_event_sync();
 521     qemu_input_queue_btn(scon->dcl.con, btn, false);
 522     qemu_input_event_sync();
 523 }
 524
 525 static void handle_windowevent(SDL_Event *ev)
 526 {
 527     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 528
 529     if (!scon) {
 530         return;
 531     }
 532
 533     switch (ev->window.event) {
 534     case SDL_WINDOWEVENT_RESIZED:
 535         {
 536             QemuUIInfo info;
 537             memset(&info, 0, sizeof(info));
 538             info.width = ev->window.data1;
 539             info.height = ev->window.data2;
 540             dpy_set_ui_info(scon->dcl.con, &info);
 541         }
 542         sdl2_redraw(scon);
 543         break;
 544     case SDL_WINDOWEVENT_EXPOSED:
 545         sdl2_redraw(scon);
 546         break;
 547     case SDL_WINDOWEVENT_FOCUS_GAINED:
 548     case SDL_WINDOWEVENT_ENTER:
 549         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 550             absolute_mouse_grab(scon);
 551         }
 552         /* If a new console window opened using a hotkey receives the
 553          * focus, SDL sends another KEYDOWN event to the new window,
 554          * closing the console window immediately after.
 555          *
 556          * Work around this by ignoring further hotkey events until a
 557          * key is released.
 558          */
 559         scon->ignore_hotkeys = get_mod_state();
 560         break;
 561     case SDL_WINDOWEVENT_FOCUS_LOST:
 562         if (gui_grab && !gui_fullscreen) {
 563             sdl_grab_end(scon);
 564         }
 565         break;
 566     case SDL_WINDOWEVENT_RESTORED:
 567         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 568         break;
 569     case SDL_WINDOWEVENT_MINIMIZED:
 570         update_displaychangelistener(&scon->dcl, 500);
 571         break;
 572     case SDL_WINDOWEVENT_CLOSE:
 573         if (qemu_console_is_graphic(scon->dcl.con)) {
 574             if (!no_quit) {
 575                 no_shutdown = 0;
 576                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 577             }
 578         } else {
 579             SDL_HideWindow(scon->real_window);
 580             scon->hidden = true;
 581         }
 582         break;
 583     case SDL_WINDOWEVENT_SHOWN:
 584         scon->hidden = false;
 585         break;
 586     case SDL_WINDOWEVENT_HIDDEN:
 587         scon->hidden = true;
 588         break;
 589     }
 590 }
 591
 592 void sdl2_poll_events(struct sdl2_console *scon)
 593 {
 594     SDL_Event ev1, *ev = &ev1;
 595     int idle = 1;
 596
 597     if (scon->last_vm_running != runstate_is_running()) {
 598         scon->last_vm_running = runstate_is_running();
 599         sdl_update_caption(scon);
 600     }
 601
 602     while (SDL_PollEvent(ev)) {
 603         switch (ev->type) {
 604         case SDL_KEYDOWN:
 605             idle = 0;
 606             handle_keydown(ev);
 607             break;
 608         case SDL_KEYUP:
 609             idle = 0;
 610             handle_keyup(ev);
 611             break;
 612         case SDL_TEXTINPUT:
 613             idle = 0;
 614             handle_textinput(ev);
 615             break;
 616         case SDL_QUIT:
 617             if (!no_quit) {
 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 void sdl_display_early_init(int opengl)
 753 {
 754     switch (opengl) {
 755     case -1: /* default */
 756     case 0:  /* off */
 757         break;
 758     case 1: /* on */
 759 #ifdef CONFIG_OPENGL
 760         display_opengl = 1;
 761 #endif
 762         break;
 763     default:
 764         g_assert_not_reached();
 765         break;
 766     }
 767 }
 768
 769 void sdl_display_init(DisplayState *ds, int full_screen)
 770 {
 771     int flags;
 772     uint8_t data = 0;
 773     char *filename;
 774     int i;
 775     SDL_SysWMinfo info;
 776
 777 #ifdef __linux__
 778     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 779      * accessible $DISPLAY to open X11 window.  This is often the case
 780      * when qemu is run using sudo.  But in this case, and when actually
 781      * run in X11 environment, SDL fights with X11 for the video card,
 782      * making current display unavailable, often until reboot.
 783      * So make x11 the default SDL video driver if this variable is unset.
 784      * This is a bit hackish but saves us from bigger problem.
 785      * Maybe it's a good idea to fix this in SDL instead.
 786      */
 787     setenv("SDL_VIDEODRIVER", "x11", 0);
 788 #endif
 789
 790     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 791     if (SDL_Init(flags)) {
 792         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 793                 SDL_GetError());
 794         exit(1);
 795     }
 796     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 797     memset(&info, 0, sizeof(info));
 798     SDL_VERSION(&info.version);
 799
 800     for (i = 0;; i++) {
 801         QemuConsole *con = qemu_console_lookup_by_index(i);
 802         if (!con) {
 803             break;
 804         }
 805     }
 806     sdl2_num_outputs = i;
 807     if (sdl2_num_outputs == 0) {
 808         return;
 809     }
 810     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 811     for (i = 0; i < sdl2_num_outputs; i++) {
 812         QemuConsole *con = qemu_console_lookup_by_index(i);
 813         assert(con != NULL);
 814         if (!qemu_console_is_graphic(con)) {
 815             sdl2_console[i].hidden = true;
 816         }
 817         sdl2_console[i].idx = i;
 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     if (full_screen) {
 852         gui_fullscreen = 1;
 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     gui_grab = 0;
 860
 861     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 862     sdl_cursor_normal = SDL_GetCursor();
 863
 864     atexit(sdl_cleanup);
 865 }