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_grab_code = KMOD_LALT | KMOD_LCTRL;
  42 static SDL_Cursor *sdl_cursor_normal;
  43 static SDL_Cursor *sdl_cursor_hidden;
  44 static int absolute_enabled;
  45 static int guest_cursor;
  46 static int guest_x, guest_y;
  47 static SDL_Cursor *guest_sprite;
  48 static Notifier mouse_mode_notifier;
  49
  50 #define SDL2_REFRESH_INTERVAL_BUSY 10
  51 #define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  52                              / SDL2_REFRESH_INTERVAL_BUSY + 1)
  53
  54 static void sdl_update_caption(struct sdl2_console *scon);
  55
  56 static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  57 {
  58     int i;
  59     for (i = 0; i < sdl2_num_outputs; i++) {
  60         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  61             return &sdl2_console[i];
  62         }
  63     }
  64     return NULL;
  65 }
  66
  67 void sdl2_window_create(struct sdl2_console *scon)
  68 {
  69     int flags = 0;
  70
  71     if (!scon->surface) {
  72         return;
  73     }
  74     assert(!scon->real_window);
  75
  76     if (gui_fullscreen) {
  77         flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  78     } else {
  79         flags |= SDL_WINDOW_RESIZABLE;
  80     }
  81     if (scon->hidden) {
  82         flags |= SDL_WINDOW_HIDDEN;
  83     }
  84
  85     scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  86                                          SDL_WINDOWPOS_UNDEFINED,
  87                                          surface_width(scon->surface),
  88                                          surface_height(scon->surface),
  89                                          flags);
  90     scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  91     if (scon->opengl) {
  92         scon->winctx = SDL_GL_GetCurrentContext();
  93     }
  94     sdl_update_caption(scon);
  95 }
  96
  97 void sdl2_window_destroy(struct sdl2_console *scon)
  98 {
  99     if (!scon->real_window) {
 100         return;
 101     }
 102
 103     SDL_DestroyRenderer(scon->real_renderer);
 104     scon->real_renderer = NULL;
 105     SDL_DestroyWindow(scon->real_window);
 106     scon->real_window = NULL;
 107 }
 108
 109 void sdl2_window_resize(struct sdl2_console *scon)
 110 {
 111     if (!scon->real_window) {
 112         return;
 113     }
 114
 115     SDL_SetWindowSize(scon->real_window,
 116                       surface_width(scon->surface),
 117                       surface_height(scon->surface));
 118 }
 119
 120 static void sdl2_redraw(struct sdl2_console *scon)
 121 {
 122     if (scon->opengl) {
 123 #ifdef CONFIG_OPENGL
 124         sdl2_gl_redraw(scon);
 125 #endif
 126     } else {
 127         sdl2_2d_redraw(scon);
 128     }
 129 }
 130
 131 static void sdl_update_caption(struct sdl2_console *scon)
 132 {
 133     char win_title[1024];
 134     char icon_title[1024];
 135     const char *status = "";
 136
 137     if (!runstate_is_running()) {
 138         status = " [Stopped]";
 139     } else if (gui_grab) {
 140         if (alt_grab) {
 141             status = " - Press Ctrl-Alt-Shift-G to exit grab";
 142         } else if (ctrl_grab) {
 143             status = " - Press Right-Ctrl-G to exit grab";
 144         } else {
 145             status = " - Press Ctrl-Alt-G to exit grab";
 146         }
 147     }
 148
 149     if (qemu_name) {
 150         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 151                  scon->idx, status);
 152         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 153     } else {
 154         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 155         snprintf(icon_title, sizeof(icon_title), "QEMU");
 156     }
 157
 158     if (scon->real_window) {
 159         SDL_SetWindowTitle(scon->real_window, win_title);
 160     }
 161 }
 162
 163 static void sdl_hide_cursor(void)
 164 {
 165     if (!cursor_hide) {
 166         return;
 167     }
 168
 169     SDL_ShowCursor(SDL_DISABLE);
 170     SDL_SetCursor(sdl_cursor_hidden);
 171
 172     if (!qemu_input_is_absolute()) {
 173         SDL_SetRelativeMouseMode(SDL_TRUE);
 174     }
 175 }
 176
 177 static void sdl_show_cursor(void)
 178 {
 179     if (!cursor_hide) {
 180         return;
 181     }
 182
 183     if (!qemu_input_is_absolute()) {
 184         SDL_SetRelativeMouseMode(SDL_FALSE);
 185     }
 186
 187     if (guest_cursor &&
 188         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 189         SDL_SetCursor(guest_sprite);
 190     } else {
 191         SDL_SetCursor(sdl_cursor_normal);
 192     }
 193
 194     SDL_ShowCursor(SDL_ENABLE);
 195 }
 196
 197 static void sdl_grab_start(struct sdl2_console *scon)
 198 {
 199     QemuConsole *con = scon ? scon->dcl.con : NULL;
 200
 201     if (!con || !qemu_console_is_graphic(con)) {
 202         return;
 203     }
 204     /*
 205      * If the application is not active, do not try to enter grab state. This
 206      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 207      * application (SDL bug).
 208      */
 209     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 210         return;
 211     }
 212     if (guest_cursor) {
 213         SDL_SetCursor(guest_sprite);
 214         if (!qemu_input_is_absolute() && !absolute_enabled) {
 215             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 216         }
 217     } else {
 218         sdl_hide_cursor();
 219     }
 220     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 221     gui_grab = 1;
 222     sdl_update_caption(scon);
 223 }
 224
 225 static void sdl_grab_end(struct sdl2_console *scon)
 226 {
 227     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 228     gui_grab = 0;
 229     sdl_show_cursor();
 230     sdl_update_caption(scon);
 231 }
 232
 233 static void absolute_mouse_grab(struct sdl2_console *scon)
 234 {
 235     int mouse_x, mouse_y;
 236     int scr_w, scr_h;
 237     SDL_GetMouseState(&mouse_x, &mouse_y);
 238     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 239     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 240         mouse_y > 0 && mouse_y < scr_h - 1) {
 241         sdl_grab_start(scon);
 242     }
 243 }
 244
 245 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 246 {
 247     if (qemu_input_is_absolute()) {
 248         if (!absolute_enabled) {
 249             absolute_enabled = 1;
 250             SDL_SetRelativeMouseMode(SDL_FALSE);
 251             absolute_mouse_grab(&sdl2_console[0]);
 252         }
 253     } else if (absolute_enabled) {
 254         if (!gui_fullscreen) {
 255             sdl_grab_end(&sdl2_console[0]);
 256         }
 257         absolute_enabled = 0;
 258     }
 259 }
 260
 261 static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 262                                  int x, int y, int state)
 263 {
 264     static uint32_t bmap[INPUT_BUTTON__MAX] = {
 265         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 266         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 267         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 268     };
 269     static uint32_t prev_state;
 270
 271     if (prev_state != state) {
 272         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 273         prev_state = state;
 274     }
 275
 276     if (qemu_input_is_absolute()) {
 277         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
 278                              x, 0, surface_width(scon->surface));
 279         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
 280                              y, 0, surface_height(scon->surface));
 281     } else {
 282         if (guest_cursor) {
 283             x -= guest_x;
 284             y -= guest_y;
 285             guest_x += x;
 286             guest_y += y;
 287             dx = x;
 288             dy = y;
 289         }
 290         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 291         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 292     }
 293     qemu_input_event_sync();
 294 }
 295
 296 static void toggle_full_screen(struct sdl2_console *scon)
 297 {
 298     gui_fullscreen = !gui_fullscreen;
 299     if (gui_fullscreen) {
 300         SDL_SetWindowFullscreen(scon->real_window,
 301                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 302         gui_saved_grab = gui_grab;
 303         sdl_grab_start(scon);
 304     } else {
 305         if (!gui_saved_grab) {
 306             sdl_grab_end(scon);
 307         }
 308         SDL_SetWindowFullscreen(scon->real_window, 0);
 309     }
 310     sdl2_redraw(scon);
 311 }
 312
 313 static int get_mod_state(void)
 314 {
 315     SDL_Keymod mod = SDL_GetModState();
 316
 317     if (alt_grab) {
 318         return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
 319             (gui_grab_code | KMOD_LSHIFT);
 320     } else if (ctrl_grab) {
 321         return (mod & KMOD_RCTRL) == KMOD_RCTRL;
 322     } else {
 323         return (mod & gui_grab_code) == gui_grab_code;
 324     }
 325 }
 326
 327 static void handle_keydown(SDL_Event *ev)
 328 {
 329     int win;
 330     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 331     int gui_key_modifier_pressed = get_mod_state();
 332     int gui_keysym = 0;
 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
 414     scon->ignore_hotkeys = false;
 415     sdl2_process_key(scon, &ev->key);
 416 }
 417
 418 static void handle_textinput(SDL_Event *ev)
 419 {
 420     struct sdl2_console *scon = get_scon_from_window(ev->text.windowID);
 421     QemuConsole *con = scon ? scon->dcl.con : NULL;
 422
 423     if (qemu_console_is_graphic(con)) {
 424         return;
 425     }
 426     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 427 }
 428
 429 static void handle_mousemotion(SDL_Event *ev)
 430 {
 431     int max_x, max_y;
 432     struct sdl2_console *scon = get_scon_from_window(ev->motion.windowID);
 433
 434     if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 435         return;
 436     }
 437
 438     if (qemu_input_is_absolute() || absolute_enabled) {
 439         int scr_w, scr_h;
 440         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 441         max_x = scr_w - 1;
 442         max_y = scr_h - 1;
 443         if (gui_grab && !gui_fullscreen
 444             && (ev->motion.x == 0 || ev->motion.y == 0 ||
 445                 ev->motion.x == max_x || ev->motion.y == max_y)) {
 446             sdl_grab_end(scon);
 447         }
 448         if (!gui_grab &&
 449             (ev->motion.x > 0 && ev->motion.x < max_x &&
 450              ev->motion.y > 0 && ev->motion.y < max_y)) {
 451             sdl_grab_start(scon);
 452         }
 453     }
 454     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 455         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 456                              ev->motion.x, ev->motion.y, ev->motion.state);
 457     }
 458 }
 459
 460 static void handle_mousebutton(SDL_Event *ev)
 461 {
 462     int buttonstate = SDL_GetMouseState(NULL, NULL);
 463     SDL_MouseButtonEvent *bev;
 464     struct sdl2_console *scon = get_scon_from_window(ev->button.windowID);
 465
 466     if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 467         return;
 468     }
 469
 470     bev = &ev->button;
 471     if (!gui_grab && !qemu_input_is_absolute()) {
 472         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 473             /* start grabbing all events */
 474             sdl_grab_start(scon);
 475         }
 476     } else {
 477         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 478             buttonstate |= SDL_BUTTON(bev->button);
 479         } else {
 480             buttonstate &= ~SDL_BUTTON(bev->button);
 481         }
 482         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 483     }
 484 }
 485
 486 static void handle_mousewheel(SDL_Event *ev)
 487 {
 488     struct sdl2_console *scon = get_scon_from_window(ev->wheel.windowID);
 489     SDL_MouseWheelEvent *wev = &ev->wheel;
 490     InputButton btn;
 491
 492     if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 493         return;
 494     }
 495
 496     if (wev->y > 0) {
 497         btn = INPUT_BUTTON_WHEEL_UP;
 498     } else if (wev->y < 0) {
 499         btn = INPUT_BUTTON_WHEEL_DOWN;
 500     } else {
 501         return;
 502     }
 503
 504     qemu_input_queue_btn(scon->dcl.con, btn, true);
 505     qemu_input_event_sync();
 506     qemu_input_queue_btn(scon->dcl.con, btn, false);
 507     qemu_input_event_sync();
 508 }
 509
 510 static void handle_windowevent(SDL_Event *ev)
 511 {
 512     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 513     bool allow_close = true;
 514
 515     if (!scon) {
 516         return;
 517     }
 518
 519     switch (ev->window.event) {
 520     case SDL_WINDOWEVENT_RESIZED:
 521         {
 522             QemuUIInfo info;
 523             memset(&info, 0, sizeof(info));
 524             info.width = ev->window.data1;
 525             info.height = ev->window.data2;
 526             dpy_set_ui_info(scon->dcl.con, &info);
 527         }
 528         sdl2_redraw(scon);
 529         break;
 530     case SDL_WINDOWEVENT_EXPOSED:
 531         sdl2_redraw(scon);
 532         break;
 533     case SDL_WINDOWEVENT_FOCUS_GAINED:
 534     case SDL_WINDOWEVENT_ENTER:
 535         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 536             absolute_mouse_grab(scon);
 537         }
 538         /* If a new console window opened using a hotkey receives the
 539          * focus, SDL sends another KEYDOWN event to the new window,
 540          * closing the console window immediately after.
 541          *
 542          * Work around this by ignoring further hotkey events until a
 543          * key is released.
 544          */
 545         scon->ignore_hotkeys = get_mod_state();
 546         break;
 547     case SDL_WINDOWEVENT_FOCUS_LOST:
 548         if (gui_grab && !gui_fullscreen) {
 549             sdl_grab_end(scon);
 550         }
 551         break;
 552     case SDL_WINDOWEVENT_RESTORED:
 553         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 554         break;
 555     case SDL_WINDOWEVENT_MINIMIZED:
 556         update_displaychangelistener(&scon->dcl, 500);
 557         break;
 558     case SDL_WINDOWEVENT_CLOSE:
 559         if (qemu_console_is_graphic(scon->dcl.con)) {
 560             if (scon->opts->has_window_close && !scon->opts->window_close) {
 561                 allow_close = false;
 562             }
 563             if (allow_close) {
 564                 no_shutdown = 0;
 565                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 566             }
 567         } else {
 568             SDL_HideWindow(scon->real_window);
 569             scon->hidden = true;
 570         }
 571         break;
 572     case SDL_WINDOWEVENT_SHOWN:
 573         scon->hidden = false;
 574         break;
 575     case SDL_WINDOWEVENT_HIDDEN:
 576         scon->hidden = true;
 577         break;
 578     }
 579 }
 580
 581 void sdl2_poll_events(struct sdl2_console *scon)
 582 {
 583     SDL_Event ev1, *ev = &ev1;
 584     bool allow_close = true;
 585     int idle = 1;
 586
 587     if (scon->last_vm_running != runstate_is_running()) {
 588         scon->last_vm_running = runstate_is_running();
 589         sdl_update_caption(scon);
 590     }
 591
 592     while (SDL_PollEvent(ev)) {
 593         switch (ev->type) {
 594         case SDL_KEYDOWN:
 595             idle = 0;
 596             handle_keydown(ev);
 597             break;
 598         case SDL_KEYUP:
 599             idle = 0;
 600             handle_keyup(ev);
 601             break;
 602         case SDL_TEXTINPUT:
 603             idle = 0;
 604             handle_textinput(ev);
 605             break;
 606         case SDL_QUIT:
 607             if (scon->opts->has_window_close && !scon->opts->window_close) {
 608                 allow_close = false;
 609             }
 610             if (allow_close) {
 611                 no_shutdown = 0;
 612                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 613             }
 614             break;
 615         case SDL_MOUSEMOTION:
 616             idle = 0;
 617             handle_mousemotion(ev);
 618             break;
 619         case SDL_MOUSEBUTTONDOWN:
 620         case SDL_MOUSEBUTTONUP:
 621             idle = 0;
 622             handle_mousebutton(ev);
 623             break;
 624         case SDL_MOUSEWHEEL:
 625             idle = 0;
 626             handle_mousewheel(ev);
 627             break;
 628         case SDL_WINDOWEVENT:
 629             handle_windowevent(ev);
 630             break;
 631         default:
 632             break;
 633         }
 634     }
 635
 636     if (idle) {
 637         if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 638             scon->idle_counter++;
 639             if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 640                 scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 641             }
 642         }
 643     } else {
 644         scon->idle_counter = 0;
 645         scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 646     }
 647 }
 648
 649 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 650                            int x, int y, int on)
 651 {
 652     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 653
 654     if (!qemu_console_is_graphic(scon->dcl.con)) {
 655         return;
 656     }
 657
 658     if (on) {
 659         if (!guest_cursor) {
 660             sdl_show_cursor();
 661         }
 662         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 663             SDL_SetCursor(guest_sprite);
 664             if (!qemu_input_is_absolute() && !absolute_enabled) {
 665                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 666             }
 667         }
 668     } else if (gui_grab) {
 669         sdl_hide_cursor();
 670     }
 671     guest_cursor = on;
 672     guest_x = x, guest_y = y;
 673 }
 674
 675 static void sdl_mouse_define(DisplayChangeListener *dcl,
 676                              QEMUCursor *c)
 677 {
 678
 679     if (guest_sprite) {
 680         SDL_FreeCursor(guest_sprite);
 681     }
 682
 683     if (guest_sprite_surface) {
 684         SDL_FreeSurface(guest_sprite_surface);
 685     }
 686
 687     guest_sprite_surface =
 688         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 689                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 690
 691     if (!guest_sprite_surface) {
 692         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 693         return;
 694     }
 695     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 696                                          c->hot_x, c->hot_y);
 697     if (!guest_sprite) {
 698         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 699         return;
 700     }
 701     if (guest_cursor &&
 702         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 703         SDL_SetCursor(guest_sprite);
 704     }
 705 }
 706
 707 static void sdl_cleanup(void)
 708 {
 709     if (guest_sprite) {
 710         SDL_FreeCursor(guest_sprite);
 711     }
 712     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 713 }
 714
 715 static const DisplayChangeListenerOps dcl_2d_ops = {
 716     .dpy_name             = "sdl2-2d",
 717     .dpy_gfx_update       = sdl2_2d_update,
 718     .dpy_gfx_switch       = sdl2_2d_switch,
 719     .dpy_gfx_check_format = sdl2_2d_check_format,
 720     .dpy_refresh          = sdl2_2d_refresh,
 721     .dpy_mouse_set        = sdl_mouse_warp,
 722     .dpy_cursor_define    = sdl_mouse_define,
 723 };
 724
 725 #ifdef CONFIG_OPENGL
 726 static const DisplayChangeListenerOps dcl_gl_ops = {
 727     .dpy_name                = "sdl2-gl",
 728     .dpy_gfx_update          = sdl2_gl_update,
 729     .dpy_gfx_switch          = sdl2_gl_switch,
 730     .dpy_gfx_check_format    = console_gl_check_format,
 731     .dpy_refresh             = sdl2_gl_refresh,
 732     .dpy_mouse_set           = sdl_mouse_warp,
 733     .dpy_cursor_define       = sdl_mouse_define,
 734
 735     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 736     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 737     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 738     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 739     .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 740     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 741     .dpy_gl_update           = sdl2_gl_scanout_flush,
 742 };
 743 #endif
 744
 745 static void sdl2_display_early_init(DisplayOptions *o)
 746 {
 747     assert(o->type == DISPLAY_TYPE_SDL);
 748     if (o->has_gl && o->gl) {
 749 #ifdef CONFIG_OPENGL
 750         display_opengl = 1;
 751 #endif
 752     }
 753 }
 754
 755 static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 756 {
 757     uint8_t data = 0;
 758     int i;
 759     SDL_SysWMinfo info;
 760     SDL_Surface *icon = NULL;
 761
 762     assert(o->type == DISPLAY_TYPE_SDL);
 763
 764 #ifdef __linux__
 765     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 766      * accessible $DISPLAY to open X11 window.  This is often the case
 767      * when qemu is run using sudo.  But in this case, and when actually
 768      * run in X11 environment, SDL fights with X11 for the video card,
 769      * making current display unavailable, often until reboot.
 770      * So make x11 the default SDL video driver if this variable is unset.
 771      * This is a bit hackish but saves us from bigger problem.
 772      * Maybe it's a good idea to fix this in SDL instead.
 773      */
 774     setenv("SDL_VIDEODRIVER", "x11", 0);
 775 #endif
 776
 777     if (SDL_Init(SDL_INIT_VIDEO)) {
 778         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 779                 SDL_GetError());
 780         exit(1);
 781     }
 782 #ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR /* only available since SDL 2.0.8 */
 783     SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
 784 #endif
 785     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 786     memset(&info, 0, sizeof(info));
 787     SDL_VERSION(&info.version);
 788
 789     gui_fullscreen = o->has_full_screen && o->full_screen;
 790
 791     for (i = 0;; i++) {
 792         QemuConsole *con = qemu_console_lookup_by_index(i);
 793         if (!con) {
 794             break;
 795         }
 796     }
 797     sdl2_num_outputs = i;
 798     if (sdl2_num_outputs == 0) {
 799         return;
 800     }
 801     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 802     for (i = 0; i < sdl2_num_outputs; i++) {
 803         QemuConsole *con = qemu_console_lookup_by_index(i);
 804         assert(con != NULL);
 805         if (!qemu_console_is_graphic(con) &&
 806             qemu_console_get_index(con) != 0) {
 807             sdl2_console[i].hidden = true;
 808         }
 809         sdl2_console[i].idx = i;
 810         sdl2_console[i].opts = o;
 811 #ifdef CONFIG_OPENGL
 812         sdl2_console[i].opengl = display_opengl;
 813         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 814 #else
 815         sdl2_console[i].opengl = 0;
 816         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 817 #endif
 818         sdl2_console[i].dcl.con = con;
 819         sdl2_console[i].kbd = qkbd_state_init(con);
 820         register_displaychangelistener(&sdl2_console[i].dcl);
 821
 822 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 823         if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 824 #if defined(SDL_VIDEO_DRIVER_WINDOWS)
 825             qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 826 #elif defined(SDL_VIDEO_DRIVER_X11)
 827             qemu_console_set_window_id(con, info.info.x11.window);
 828 #endif
 829         }
 830 #endif
 831     }
 832
 833 #ifdef CONFIG_SDL_IMAGE
 834     icon = IMG_Load(CONFIG_QEMU_ICONDIR "/hicolor/128x128/apps/qemu.png");
 835 #else
 836     /* Load a 32x32x4 image. White pixels are transparent. */
 837     icon = SDL_LoadBMP(CONFIG_QEMU_ICONDIR "/hicolor/32x32/apps/qemu.bmp");
 838     if (icon) {
 839         uint32_t colorkey = SDL_MapRGB(icon->format, 255, 255, 255);
 840         SDL_SetColorKey(icon, SDL_TRUE, colorkey);
 841     }
 842 #endif
 843     if (icon) {
 844         SDL_SetWindowIcon(sdl2_console[0].real_window, icon);
 845     }
 846
 847     gui_grab = 0;
 848     if (gui_fullscreen) {
 849         sdl_grab_start(0);
 850     }
 851
 852     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 853     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 854
 855     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 856     sdl_cursor_normal = SDL_GetCursor();
 857
 858     atexit(sdl_cleanup);
 859 }
 860
 861 static QemuDisplay qemu_display_sdl2 = {
 862     .type       = DISPLAY_TYPE_SDL,
 863     .early_init = sdl2_display_early_init,
 864     .init       = sdl2_display_init,
 865 };
 866
 867 static void register_sdl1(void)
 868 {
 869     qemu_display_register(&qemu_display_sdl2);
 870 }
 871
 872 type_init(register_sdl1);