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