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_noframe;
  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 to exit grab";
 145         } else if (ctrl_grab) {
 146             status = " - Press Right-Ctrl to exit grab";
 147         } else {
 148             status = " - Press Ctrl-Alt 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     if (qemu_input_is_absolute()) {
 173         SDL_ShowCursor(1);
 174         SDL_SetCursor(sdl_cursor_hidden);
 175     } else {
 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         SDL_ShowCursor(1);
 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 }
 197
 198 static void sdl_grab_start(struct sdl2_console *scon)
 199 {
 200     QemuConsole *con = scon ? scon->dcl.con : NULL;
 201
 202     if (!con || !qemu_console_is_graphic(con)) {
 203         return;
 204     }
 205     /*
 206      * If the application is not active, do not try to enter grab state. This
 207      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 208      * application (SDL bug).
 209      */
 210     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 211         return;
 212     }
 213     if (guest_cursor) {
 214         SDL_SetCursor(guest_sprite);
 215         if (!qemu_input_is_absolute() && !absolute_enabled) {
 216             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 217         }
 218     } else {
 219         sdl_hide_cursor();
 220     }
 221     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 222     gui_grab = 1;
 223     sdl_update_caption(scon);
 224 }
 225
 226 static void sdl_grab_end(struct sdl2_console *scon)
 227 {
 228     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 229     gui_grab = 0;
 230     sdl_show_cursor();
 231     sdl_update_caption(scon);
 232 }
 233
 234 static void absolute_mouse_grab(struct sdl2_console *scon)
 235 {
 236     int mouse_x, mouse_y;
 237     int scr_w, scr_h;
 238     SDL_GetMouseState(&mouse_x, &mouse_y);
 239     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 240     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 241         mouse_y > 0 && mouse_y < scr_h - 1) {
 242         sdl_grab_start(scon);
 243     }
 244 }
 245
 246 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 247 {
 248     if (qemu_input_is_absolute()) {
 249         if (!absolute_enabled) {
 250             absolute_enabled = 1;
 251             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         int scr_w, scr_h;
 278         int max_w = 0, max_h = 0;
 279         int off_x = 0, off_y = 0;
 280         int cur_off_x = 0, cur_off_y = 0;
 281         int i;
 282
 283         for (i = 0; i < sdl2_num_outputs; i++) {
 284             struct sdl2_console *thiscon = &sdl2_console[i];
 285             if (thiscon->real_window && thiscon->surface) {
 286                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 287                 cur_off_x = thiscon->x;
 288                 cur_off_y = thiscon->y;
 289                 if (scr_w + cur_off_x > max_w) {
 290                     max_w = scr_w + cur_off_x;
 291                 }
 292                 if (scr_h + cur_off_y > max_h) {
 293                     max_h = scr_h + cur_off_y;
 294                 }
 295                 if (i == scon->idx) {
 296                     off_x = cur_off_x;
 297                     off_y = cur_off_y;
 298                 }
 299             }
 300         }
 301         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 302         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 303     } else {
 304         if (guest_cursor) {
 305             x -= guest_x;
 306             y -= guest_y;
 307             guest_x += x;
 308             guest_y += y;
 309             dx = x;
 310             dy = y;
 311         }
 312         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 313         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 314     }
 315     qemu_input_event_sync();
 316 }
 317
 318 static void toggle_full_screen(struct sdl2_console *scon)
 319 {
 320     gui_fullscreen = !gui_fullscreen;
 321     if (gui_fullscreen) {
 322         SDL_SetWindowFullscreen(scon->real_window,
 323                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 324         gui_saved_grab = gui_grab;
 325         sdl_grab_start(scon);
 326     } else {
 327         if (!gui_saved_grab) {
 328             sdl_grab_end(scon);
 329         }
 330         SDL_SetWindowFullscreen(scon->real_window, 0);
 331     }
 332     sdl2_redraw(scon);
 333 }
 334
 335 static void handle_keydown(SDL_Event *ev)
 336 {
 337     int mod_state, win;
 338     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 339
 340     if (alt_grab) {
 341         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 342             (gui_grab_code | KMOD_LSHIFT);
 343     } else if (ctrl_grab) {
 344         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 345     } else {
 346         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 347     }
 348     gui_key_modifier_pressed = mod_state;
 349
 350     if (gui_key_modifier_pressed) {
 351         switch (ev->key.keysym.scancode) {
 352         case SDL_SCANCODE_2:
 353         case SDL_SCANCODE_3:
 354         case SDL_SCANCODE_4:
 355         case SDL_SCANCODE_5:
 356         case SDL_SCANCODE_6:
 357         case SDL_SCANCODE_7:
 358         case SDL_SCANCODE_8:
 359         case SDL_SCANCODE_9:
 360             if (gui_grab) {
 361                 sdl_grab_end(scon);
 362             }
 363
 364             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 365             if (win < sdl2_num_outputs) {
 366                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 367                 if (sdl2_console[win].real_window) {
 368                     if (sdl2_console[win].hidden) {
 369                         SDL_HideWindow(sdl2_console[win].real_window);
 370                     } else {
 371                         SDL_ShowWindow(sdl2_console[win].real_window);
 372                     }
 373                 }
 374                 gui_keysym = 1;
 375             }
 376             break;
 377         case SDL_SCANCODE_F:
 378             toggle_full_screen(scon);
 379             gui_keysym = 1;
 380             break;
 381         case SDL_SCANCODE_U:
 382             sdl2_window_destroy(scon);
 383             sdl2_window_create(scon);
 384             if (!scon->opengl) {
 385                 /* re-create scon->texture */
 386                 sdl2_2d_switch(&scon->dcl, scon->surface);
 387             }
 388             gui_keysym = 1;
 389             break;
 390 #if 0
 391         case SDL_SCANCODE_KP_PLUS:
 392         case SDL_SCANCODE_KP_MINUS:
 393             if (!gui_fullscreen) {
 394                 int scr_w, scr_h;
 395                 int width, height;
 396                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 397
 398                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 399                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 400                             160);
 401                 height = (surface_height(scon->surface) * width) /
 402                     surface_width(scon->surface);
 403                 fprintf(stderr, "%s: scale to %dx%d\n",
 404                         __func__, width, height);
 405                 sdl_scale(scon, width, height);
 406                 sdl2_redraw(scon);
 407                 gui_keysym = 1;
 408             }
 409 #endif
 410         default:
 411             break;
 412         }
 413     }
 414     if (!gui_keysym) {
 415         sdl2_process_key(scon, &ev->key);
 416     }
 417 }
 418
 419 static void handle_keyup(SDL_Event *ev)
 420 {
 421     int mod_state;
 422     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 423
 424     if (!alt_grab) {
 425         mod_state = (ev->key.keysym.mod & gui_grab_code);
 426     } else {
 427         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 428     }
 429     if (!mod_state && gui_key_modifier_pressed) {
 430         gui_key_modifier_pressed = 0;
 431         if (gui_keysym == 0) {
 432             /* exit/enter grab if pressing Ctrl-Alt */
 433             if (!gui_grab) {
 434                 sdl_grab_start(scon);
 435             } else if (!gui_fullscreen) {
 436                 sdl_grab_end(scon);
 437             }
 438             /* SDL does not send back all the modifiers key, so we must
 439              * correct it. */
 440             sdl2_reset_keys(scon);
 441             return;
 442         }
 443         gui_keysym = 0;
 444     }
 445     if (!gui_keysym) {
 446         sdl2_process_key(scon, &ev->key);
 447     }
 448 }
 449
 450 static void handle_textinput(SDL_Event *ev)
 451 {
 452     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 453     QemuConsole *con = scon ? scon->dcl.con : NULL;
 454
 455     if (qemu_console_is_graphic(con)) {
 456         return;
 457     }
 458     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 459 }
 460
 461 static void handle_mousemotion(SDL_Event *ev)
 462 {
 463     int max_x, max_y;
 464     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 465
 466     if (qemu_input_is_absolute() || absolute_enabled) {
 467         int scr_w, scr_h;
 468         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 469         max_x = scr_w - 1;
 470         max_y = scr_h - 1;
 471         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 472                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 473             sdl_grab_end(scon);
 474         }
 475         if (!gui_grab &&
 476             (ev->motion.x > 0 && ev->motion.x < max_x &&
 477              ev->motion.y > 0 && ev->motion.y < max_y)) {
 478             sdl_grab_start(scon);
 479         }
 480     }
 481     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 482         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 483                              ev->motion.x, ev->motion.y, ev->motion.state);
 484     }
 485 }
 486
 487 static void handle_mousebutton(SDL_Event *ev)
 488 {
 489     int buttonstate = SDL_GetMouseState(NULL, NULL);
 490     SDL_MouseButtonEvent *bev;
 491     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 492
 493     bev = &ev->button;
 494     if (!gui_grab && !qemu_input_is_absolute()) {
 495         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 496             /* start grabbing all events */
 497             sdl_grab_start(scon);
 498         }
 499     } else {
 500         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 501             buttonstate |= SDL_BUTTON(bev->button);
 502         } else {
 503             buttonstate &= ~SDL_BUTTON(bev->button);
 504         }
 505         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 506     }
 507 }
 508
 509 static void handle_mousewheel(SDL_Event *ev)
 510 {
 511     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 512     SDL_MouseWheelEvent *wev = &ev->wheel;
 513     InputButton btn;
 514
 515     if (wev->y > 0) {
 516         btn = INPUT_BUTTON_WHEEL_UP;
 517     } else if (wev->y < 0) {
 518         btn = INPUT_BUTTON_WHEEL_DOWN;
 519     } else {
 520         return;
 521     }
 522
 523     qemu_input_queue_btn(scon->dcl.con, btn, true);
 524     qemu_input_event_sync();
 525     qemu_input_queue_btn(scon->dcl.con, btn, false);
 526     qemu_input_event_sync();
 527 }
 528
 529 static void handle_windowevent(SDL_Event *ev)
 530 {
 531     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 532
 533     if (!scon) {
 534         return;
 535     }
 536
 537     switch (ev->window.event) {
 538     case SDL_WINDOWEVENT_RESIZED:
 539         {
 540             QemuUIInfo info;
 541             memset(&info, 0, sizeof(info));
 542             info.width = ev->window.data1;
 543             info.height = ev->window.data2;
 544             dpy_set_ui_info(scon->dcl.con, &info);
 545         }
 546         sdl2_redraw(scon);
 547         break;
 548     case SDL_WINDOWEVENT_EXPOSED:
 549         sdl2_redraw(scon);
 550         break;
 551     case SDL_WINDOWEVENT_FOCUS_GAINED:
 552     case SDL_WINDOWEVENT_ENTER:
 553         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 554             absolute_mouse_grab(scon);
 555         }
 556         break;
 557     case SDL_WINDOWEVENT_FOCUS_LOST:
 558         if (gui_grab && !gui_fullscreen) {
 559             sdl_grab_end(scon);
 560         }
 561         break;
 562     case SDL_WINDOWEVENT_RESTORED:
 563         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 564         break;
 565     case SDL_WINDOWEVENT_MINIMIZED:
 566         update_displaychangelistener(&scon->dcl, 500);
 567         break;
 568     case SDL_WINDOWEVENT_CLOSE:
 569         if (!no_quit) {
 570             no_shutdown = 0;
 571             qemu_system_shutdown_request();
 572         }
 573         break;
 574     case SDL_WINDOWEVENT_SHOWN:
 575         if (scon->hidden) {
 576             SDL_HideWindow(scon->real_window);
 577         }
 578         break;
 579     case SDL_WINDOWEVENT_HIDDEN:
 580         if (!scon->hidden) {
 581             SDL_ShowWindow(scon->real_window);
 582         }
 583         break;
 584     }
 585 }
 586
 587 void sdl2_poll_events(struct sdl2_console *scon)
 588 {
 589     SDL_Event ev1, *ev = &ev1;
 590     int idle = 1;
 591
 592     if (scon->last_vm_running != runstate_is_running()) {
 593         scon->last_vm_running = runstate_is_running();
 594         sdl_update_caption(scon);
 595     }
 596
 597     while (SDL_PollEvent(ev)) {
 598         switch (ev->type) {
 599         case SDL_KEYDOWN:
 600             idle = 0;
 601             handle_keydown(ev);
 602             break;
 603         case SDL_KEYUP:
 604             idle = 0;
 605             handle_keyup(ev);
 606             break;
 607         case SDL_TEXTINPUT:
 608             idle = 0;
 609             handle_textinput(ev);
 610             break;
 611         case SDL_QUIT:
 612             if (!no_quit) {
 613                 no_shutdown = 0;
 614                 qemu_system_shutdown_request();
 615             }
 616             break;
 617         case SDL_MOUSEMOTION:
 618             idle = 0;
 619             handle_mousemotion(ev);
 620             break;
 621         case SDL_MOUSEBUTTONDOWN:
 622         case SDL_MOUSEBUTTONUP:
 623             idle = 0;
 624             handle_mousebutton(ev);
 625             break;
 626         case SDL_MOUSEWHEEL:
 627             idle = 0;
 628             handle_mousewheel(ev);
 629             break;
 630         case SDL_WINDOWEVENT:
 631             handle_windowevent(ev);
 632             break;
 633         default:
 634             break;
 635         }
 636     }
 637
 638     if (idle) {
 639         if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 640             scon->idle_counter++;
 641             if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 642                 scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 643             }
 644         }
 645     } else {
 646         scon->idle_counter = 0;
 647         scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 648     }
 649 }
 650
 651 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 652                            int x, int y, int on)
 653 {
 654     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 655     if (on) {
 656         if (!guest_cursor) {
 657             sdl_show_cursor();
 658         }
 659         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 660             SDL_SetCursor(guest_sprite);
 661             if (!qemu_input_is_absolute() && !absolute_enabled) {
 662                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 663             }
 664         }
 665     } else if (gui_grab) {
 666         sdl_hide_cursor();
 667     }
 668     guest_cursor = on;
 669     guest_x = x, guest_y = y;
 670 }
 671
 672 static void sdl_mouse_define(DisplayChangeListener *dcl,
 673                              QEMUCursor *c)
 674 {
 675
 676     if (guest_sprite) {
 677         SDL_FreeCursor(guest_sprite);
 678     }
 679
 680     if (guest_sprite_surface) {
 681         SDL_FreeSurface(guest_sprite_surface);
 682     }
 683
 684     guest_sprite_surface =
 685         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 686                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 687
 688     if (!guest_sprite_surface) {
 689         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 690         return;
 691     }
 692     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 693                                          c->hot_x, c->hot_y);
 694     if (!guest_sprite) {
 695         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 696         return;
 697     }
 698     if (guest_cursor &&
 699         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 700         SDL_SetCursor(guest_sprite);
 701     }
 702 }
 703
 704 static void sdl_cleanup(void)
 705 {
 706     if (guest_sprite) {
 707         SDL_FreeCursor(guest_sprite);
 708     }
 709     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 710 }
 711
 712 static const DisplayChangeListenerOps dcl_2d_ops = {
 713     .dpy_name             = "sdl2-2d",
 714     .dpy_gfx_update       = sdl2_2d_update,
 715     .dpy_gfx_switch       = sdl2_2d_switch,
 716     .dpy_gfx_check_format = sdl2_2d_check_format,
 717     .dpy_refresh          = sdl2_2d_refresh,
 718     .dpy_mouse_set        = sdl_mouse_warp,
 719     .dpy_cursor_define    = sdl_mouse_define,
 720 };
 721
 722 #ifdef CONFIG_OPENGL
 723 static const DisplayChangeListenerOps dcl_gl_ops = {
 724     .dpy_name                = "sdl2-gl",
 725     .dpy_gfx_update          = sdl2_gl_update,
 726     .dpy_gfx_switch          = sdl2_gl_switch,
 727     .dpy_gfx_check_format    = console_gl_check_format,
 728     .dpy_refresh             = sdl2_gl_refresh,
 729     .dpy_mouse_set           = sdl_mouse_warp,
 730     .dpy_cursor_define       = sdl_mouse_define,
 731
 732     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 733     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 734     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 735     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 736     .dpy_gl_scanout          = sdl2_gl_scanout,
 737     .dpy_gl_update           = sdl2_gl_scanout_flush,
 738 };
 739 #endif
 740
 741 void sdl_display_early_init(int opengl)
 742 {
 743     switch (opengl) {
 744     case -1: /* default */
 745     case 0:  /* off */
 746         break;
 747     case 1: /* on */
 748 #ifdef CONFIG_OPENGL
 749         display_opengl = 1;
 750 #endif
 751         break;
 752     default:
 753         g_assert_not_reached();
 754         break;
 755     }
 756 }
 757
 758 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 759 {
 760     int flags;
 761     uint8_t data = 0;
 762     char *filename;
 763     int i;
 764
 765     if (no_frame) {
 766         gui_noframe = 1;
 767     }
 768
 769 #ifdef __linux__
 770     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 771      * accessible $DISPLAY to open X11 window.  This is often the case
 772      * when qemu is run using sudo.  But in this case, and when actually
 773      * run in X11 environment, SDL fights with X11 for the video card,
 774      * making current display unavailable, often until reboot.
 775      * So make x11 the default SDL video driver if this variable is unset.
 776      * This is a bit hackish but saves us from bigger problem.
 777      * Maybe it's a good idea to fix this in SDL instead.
 778      */
 779     setenv("SDL_VIDEODRIVER", "x11", 0);
 780 #endif
 781
 782     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 783     if (SDL_Init(flags)) {
 784         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 785                 SDL_GetError());
 786         exit(1);
 787     }
 788     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 789
 790     for (i = 0;; i++) {
 791         QemuConsole *con = qemu_console_lookup_by_index(i);
 792         if (!con) {
 793             break;
 794         }
 795     }
 796     sdl2_num_outputs = i;
 797     if (sdl2_num_outputs == 0) {
 798         return;
 799     }
 800     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 801     for (i = 0; i < sdl2_num_outputs; i++) {
 802         QemuConsole *con = qemu_console_lookup_by_index(i);
 803         if (!qemu_console_is_graphic(con)) {
 804             sdl2_console[i].hidden = true;
 805         }
 806         sdl2_console[i].idx = i;
 807 #ifdef CONFIG_OPENGL
 808         sdl2_console[i].opengl = display_opengl;
 809         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 810 #else
 811         sdl2_console[i].opengl = 0;
 812         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 813 #endif
 814         sdl2_console[i].dcl.con = con;
 815         register_displaychangelistener(&sdl2_console[i].dcl);
 816     }
 817
 818     /* Load a 32x32x4 image. White pixels are transparent. */
 819     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 820     if (filename) {
 821         SDL_Surface *image = SDL_LoadBMP(filename);
 822         if (image) {
 823             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 824             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 825             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 826         }
 827         g_free(filename);
 828     }
 829
 830     if (full_screen) {
 831         gui_fullscreen = 1;
 832         sdl_grab_start(0);
 833     }
 834
 835     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 836     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 837
 838     gui_grab = 0;
 839
 840     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 841     sdl_cursor_normal = SDL_GetCursor();
 842
 843     atexit(sdl_cleanup);
 844 }