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     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             absolute_mouse_grab(&sdl2_console[0]);
 254         }
 255     } else if (absolute_enabled) {
 256         if (!gui_fullscreen) {
 257             sdl_grab_end(&sdl2_console[0]);
 258         }
 259         absolute_enabled = 0;
 260     }
 261 }
 262
 263 static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 264                                  int x, int y, int state)
 265 {
 266     static uint32_t bmap[INPUT_BUTTON__MAX] = {
 267         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 268         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 269         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 270     };
 271     static uint32_t prev_state;
 272
 273     if (prev_state != state) {
 274         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 275         prev_state = state;
 276     }
 277
 278     if (qemu_input_is_absolute()) {
 279         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
 280                              x, 0, surface_width(scon->surface));
 281         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
 282                              y, 0, surface_height(scon->surface));
 283     } else {
 284         if (guest_cursor) {
 285             x -= guest_x;
 286             y -= guest_y;
 287             guest_x += x;
 288             guest_y += y;
 289             dx = x;
 290             dy = y;
 291         }
 292         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 293         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 294     }
 295     qemu_input_event_sync();
 296 }
 297
 298 static void toggle_full_screen(struct sdl2_console *scon)
 299 {
 300     gui_fullscreen = !gui_fullscreen;
 301     if (gui_fullscreen) {
 302         SDL_SetWindowFullscreen(scon->real_window,
 303                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 304         gui_saved_grab = gui_grab;
 305         sdl_grab_start(scon);
 306     } else {
 307         if (!gui_saved_grab) {
 308             sdl_grab_end(scon);
 309         }
 310         SDL_SetWindowFullscreen(scon->real_window, 0);
 311     }
 312     sdl2_redraw(scon);
 313 }
 314
 315 static int get_mod_state(void)
 316 {
 317     SDL_Keymod mod = SDL_GetModState();
 318
 319     if (alt_grab) {
 320         return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
 321             (gui_grab_code | KMOD_LSHIFT);
 322     } else if (ctrl_grab) {
 323         return (mod & KMOD_RCTRL) == KMOD_RCTRL;
 324     } else {
 325         return (mod & gui_grab_code) == gui_grab_code;
 326     }
 327 }
 328
 329 static void handle_keydown(SDL_Event *ev)
 330 {
 331     int win;
 332     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 333
 334     gui_key_modifier_pressed = get_mod_state();
 335
 336     if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
 337         switch (ev->key.keysym.scancode) {
 338         case SDL_SCANCODE_2:
 339         case SDL_SCANCODE_3:
 340         case SDL_SCANCODE_4:
 341         case SDL_SCANCODE_5:
 342         case SDL_SCANCODE_6:
 343         case SDL_SCANCODE_7:
 344         case SDL_SCANCODE_8:
 345         case SDL_SCANCODE_9:
 346             if (gui_grab) {
 347                 sdl_grab_end(scon);
 348             }
 349
 350             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 351             if (win < sdl2_num_outputs) {
 352                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 353                 if (sdl2_console[win].real_window) {
 354                     if (sdl2_console[win].hidden) {
 355                         SDL_HideWindow(sdl2_console[win].real_window);
 356                     } else {
 357                         SDL_ShowWindow(sdl2_console[win].real_window);
 358                     }
 359                 }
 360                 gui_keysym = 1;
 361             }
 362             break;
 363         case SDL_SCANCODE_F:
 364             toggle_full_screen(scon);
 365             gui_keysym = 1;
 366             break;
 367         case SDL_SCANCODE_U:
 368             sdl2_window_destroy(scon);
 369             sdl2_window_create(scon);
 370             if (!scon->opengl) {
 371                 /* re-create scon->texture */
 372                 sdl2_2d_switch(&scon->dcl, scon->surface);
 373             }
 374             gui_keysym = 1;
 375             break;
 376 #if 0
 377         case SDL_SCANCODE_KP_PLUS:
 378         case SDL_SCANCODE_KP_MINUS:
 379             if (!gui_fullscreen) {
 380                 int scr_w, scr_h;
 381                 int width, height;
 382                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 383
 384                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 385                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 386                             160);
 387                 height = (surface_height(scon->surface) * width) /
 388                     surface_width(scon->surface);
 389                 fprintf(stderr, "%s: scale to %dx%d\n",
 390                         __func__, width, height);
 391                 sdl_scale(scon, width, height);
 392                 sdl2_redraw(scon);
 393                 gui_keysym = 1;
 394             }
 395 #endif
 396         default:
 397             break;
 398         }
 399     }
 400     if (!gui_keysym) {
 401         sdl2_process_key(scon, &ev->key);
 402     }
 403 }
 404
 405 static void handle_keyup(SDL_Event *ev)
 406 {
 407     int mod_state;
 408     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 409
 410     scon->ignore_hotkeys = false;
 411
 412     if (!alt_grab) {
 413         mod_state = (ev->key.keysym.mod & gui_grab_code);
 414     } else {
 415         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 416     }
 417     if (!mod_state && gui_key_modifier_pressed) {
 418         gui_key_modifier_pressed = 0;
 419         if (gui_keysym == 0) {
 420             /* exit/enter grab if pressing Ctrl-Alt */
 421             if (!gui_grab) {
 422                 sdl_grab_start(scon);
 423             } else if (!gui_fullscreen) {
 424                 sdl_grab_end(scon);
 425             }
 426             /* SDL does not send back all the modifiers key, so we must
 427              * correct it. */
 428             sdl2_reset_keys(scon);
 429             return;
 430         }
 431         sdl2_reset_keys(scon);
 432         gui_keysym = 0;
 433     }
 434     if (!gui_keysym) {
 435         sdl2_process_key(scon, &ev->key);
 436     }
 437 }
 438
 439 static void handle_textinput(SDL_Event *ev)
 440 {
 441     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 442     QemuConsole *con = scon ? scon->dcl.con : NULL;
 443
 444     if (qemu_console_is_graphic(con)) {
 445         return;
 446     }
 447     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 448 }
 449
 450 static void handle_mousemotion(SDL_Event *ev)
 451 {
 452     int max_x, max_y;
 453     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 454
 455     if (!qemu_console_is_graphic(scon->dcl.con)) {
 456         return;
 457     }
 458
 459     if (qemu_input_is_absolute() || absolute_enabled) {
 460         int scr_w, scr_h;
 461         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 462         max_x = scr_w - 1;
 463         max_y = scr_h - 1;
 464         if (gui_grab && !gui_fullscreen
 465             && (ev->motion.x == 0 || ev->motion.y == 0 ||
 466                 ev->motion.x == max_x || ev->motion.y == max_y)) {
 467             sdl_grab_end(scon);
 468         }
 469         if (!gui_grab &&
 470             (ev->motion.x > 0 && ev->motion.x < max_x &&
 471              ev->motion.y > 0 && ev->motion.y < max_y)) {
 472             sdl_grab_start(scon);
 473         }
 474     }
 475     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 476         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 477                              ev->motion.x, ev->motion.y, ev->motion.state);
 478     }
 479 }
 480
 481 static void handle_mousebutton(SDL_Event *ev)
 482 {
 483     int buttonstate = SDL_GetMouseState(NULL, NULL);
 484     SDL_MouseButtonEvent *bev;
 485     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 486
 487     if (!qemu_console_is_graphic(scon->dcl.con)) {
 488         return;
 489     }
 490
 491     bev = &ev->button;
 492     if (!gui_grab && !qemu_input_is_absolute()) {
 493         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 494             /* start grabbing all events */
 495             sdl_grab_start(scon);
 496         }
 497     } else {
 498         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 499             buttonstate |= SDL_BUTTON(bev->button);
 500         } else {
 501             buttonstate &= ~SDL_BUTTON(bev->button);
 502         }
 503         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 504     }
 505 }
 506
 507 static void handle_mousewheel(SDL_Event *ev)
 508 {
 509     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 510     SDL_MouseWheelEvent *wev = &ev->wheel;
 511     InputButton btn;
 512
 513     if (!qemu_console_is_graphic(scon->dcl.con)) {
 514         return;
 515     }
 516
 517     if (wev->y > 0) {
 518         btn = INPUT_BUTTON_WHEEL_UP;
 519     } else if (wev->y < 0) {
 520         btn = INPUT_BUTTON_WHEEL_DOWN;
 521     } else {
 522         return;
 523     }
 524
 525     qemu_input_queue_btn(scon->dcl.con, btn, true);
 526     qemu_input_event_sync();
 527     qemu_input_queue_btn(scon->dcl.con, btn, false);
 528     qemu_input_event_sync();
 529 }
 530
 531 static void handle_windowevent(SDL_Event *ev)
 532 {
 533     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 534
 535     if (!scon) {
 536         return;
 537     }
 538
 539     switch (ev->window.event) {
 540     case SDL_WINDOWEVENT_RESIZED:
 541         {
 542             QemuUIInfo info;
 543             memset(&info, 0, sizeof(info));
 544             info.width = ev->window.data1;
 545             info.height = ev->window.data2;
 546             dpy_set_ui_info(scon->dcl.con, &info);
 547         }
 548         sdl2_redraw(scon);
 549         break;
 550     case SDL_WINDOWEVENT_EXPOSED:
 551         sdl2_redraw(scon);
 552         break;
 553     case SDL_WINDOWEVENT_FOCUS_GAINED:
 554     case SDL_WINDOWEVENT_ENTER:
 555         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 556             absolute_mouse_grab(scon);
 557         }
 558         /* If a new console window opened using a hotkey receives the
 559          * focus, SDL sends another KEYDOWN event to the new window,
 560          * closing the console window immediately after.
 561          *
 562          * Work around this by ignoring further hotkey events until a
 563          * key is released.
 564          */
 565         scon->ignore_hotkeys = get_mod_state();
 566         break;
 567     case SDL_WINDOWEVENT_FOCUS_LOST:
 568         if (gui_grab && !gui_fullscreen) {
 569             sdl_grab_end(scon);
 570         }
 571         break;
 572     case SDL_WINDOWEVENT_RESTORED:
 573         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 574         break;
 575     case SDL_WINDOWEVENT_MINIMIZED:
 576         update_displaychangelistener(&scon->dcl, 500);
 577         break;
 578     case SDL_WINDOWEVENT_CLOSE:
 579         if (qemu_console_is_graphic(scon->dcl.con)) {
 580             if (!no_quit) {
 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     int idle = 1;
 602
 603     if (scon->last_vm_running != runstate_is_running()) {
 604         scon->last_vm_running = runstate_is_running();
 605         sdl_update_caption(scon);
 606     }
 607
 608     while (SDL_PollEvent(ev)) {
 609         switch (ev->type) {
 610         case SDL_KEYDOWN:
 611             idle = 0;
 612             handle_keydown(ev);
 613             break;
 614         case SDL_KEYUP:
 615             idle = 0;
 616             handle_keyup(ev);
 617             break;
 618         case SDL_TEXTINPUT:
 619             idle = 0;
 620             handle_textinput(ev);
 621             break;
 622         case SDL_QUIT:
 623             if (!no_quit) {
 624                 no_shutdown = 0;
 625                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 626             }
 627             break;
 628         case SDL_MOUSEMOTION:
 629             idle = 0;
 630             handle_mousemotion(ev);
 631             break;
 632         case SDL_MOUSEBUTTONDOWN:
 633         case SDL_MOUSEBUTTONUP:
 634             idle = 0;
 635             handle_mousebutton(ev);
 636             break;
 637         case SDL_MOUSEWHEEL:
 638             idle = 0;
 639             handle_mousewheel(ev);
 640             break;
 641         case SDL_WINDOWEVENT:
 642             handle_windowevent(ev);
 643             break;
 644         default:
 645             break;
 646         }
 647     }
 648
 649     if (idle) {
 650         if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 651             scon->idle_counter++;
 652             if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 653                 scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 654             }
 655         }
 656     } else {
 657         scon->idle_counter = 0;
 658         scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 659     }
 660 }
 661
 662 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 663                            int x, int y, int on)
 664 {
 665     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 666
 667     if (!qemu_console_is_graphic(scon->dcl.con)) {
 668         return;
 669     }
 670
 671     if (on) {
 672         if (!guest_cursor) {
 673             sdl_show_cursor();
 674         }
 675         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 676             SDL_SetCursor(guest_sprite);
 677             if (!qemu_input_is_absolute() && !absolute_enabled) {
 678                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 679             }
 680         }
 681     } else if (gui_grab) {
 682         sdl_hide_cursor();
 683     }
 684     guest_cursor = on;
 685     guest_x = x, guest_y = y;
 686 }
 687
 688 static void sdl_mouse_define(DisplayChangeListener *dcl,
 689                              QEMUCursor *c)
 690 {
 691
 692     if (guest_sprite) {
 693         SDL_FreeCursor(guest_sprite);
 694     }
 695
 696     if (guest_sprite_surface) {
 697         SDL_FreeSurface(guest_sprite_surface);
 698     }
 699
 700     guest_sprite_surface =
 701         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 702                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 703
 704     if (!guest_sprite_surface) {
 705         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 706         return;
 707     }
 708     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 709                                          c->hot_x, c->hot_y);
 710     if (!guest_sprite) {
 711         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 712         return;
 713     }
 714     if (guest_cursor &&
 715         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 716         SDL_SetCursor(guest_sprite);
 717     }
 718 }
 719
 720 static void sdl_cleanup(void)
 721 {
 722     if (guest_sprite) {
 723         SDL_FreeCursor(guest_sprite);
 724     }
 725     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 726 }
 727
 728 static const DisplayChangeListenerOps dcl_2d_ops = {
 729     .dpy_name             = "sdl2-2d",
 730     .dpy_gfx_update       = sdl2_2d_update,
 731     .dpy_gfx_switch       = sdl2_2d_switch,
 732     .dpy_gfx_check_format = sdl2_2d_check_format,
 733     .dpy_refresh          = sdl2_2d_refresh,
 734     .dpy_mouse_set        = sdl_mouse_warp,
 735     .dpy_cursor_define    = sdl_mouse_define,
 736 };
 737
 738 #ifdef CONFIG_OPENGL
 739 static const DisplayChangeListenerOps dcl_gl_ops = {
 740     .dpy_name                = "sdl2-gl",
 741     .dpy_gfx_update          = sdl2_gl_update,
 742     .dpy_gfx_switch          = sdl2_gl_switch,
 743     .dpy_gfx_check_format    = console_gl_check_format,
 744     .dpy_refresh             = sdl2_gl_refresh,
 745     .dpy_mouse_set           = sdl_mouse_warp,
 746     .dpy_cursor_define       = sdl_mouse_define,
 747
 748     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 749     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 750     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 751     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 752     .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 753     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 754     .dpy_gl_update           = sdl2_gl_scanout_flush,
 755 };
 756 #endif
 757
 758 void sdl_display_early_init(int opengl)
 759 {
 760     switch (opengl) {
 761     case -1: /* default */
 762     case 0:  /* off */
 763         break;
 764     case 1: /* on */
 765 #ifdef CONFIG_OPENGL
 766         display_opengl = 1;
 767 #endif
 768         break;
 769     default:
 770         g_assert_not_reached();
 771         break;
 772     }
 773 }
 774
 775 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 776 {
 777     int flags;
 778     uint8_t data = 0;
 779     char *filename;
 780     int i;
 781     SDL_SysWMinfo info;
 782
 783     if (no_frame) {
 784         gui_noframe = 1;
 785     }
 786
 787 #ifdef __linux__
 788     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 789      * accessible $DISPLAY to open X11 window.  This is often the case
 790      * when qemu is run using sudo.  But in this case, and when actually
 791      * run in X11 environment, SDL fights with X11 for the video card,
 792      * making current display unavailable, often until reboot.
 793      * So make x11 the default SDL video driver if this variable is unset.
 794      * This is a bit hackish but saves us from bigger problem.
 795      * Maybe it's a good idea to fix this in SDL instead.
 796      */
 797     setenv("SDL_VIDEODRIVER", "x11", 0);
 798 #endif
 799
 800     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 801     if (SDL_Init(flags)) {
 802         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 803                 SDL_GetError());
 804         exit(1);
 805     }
 806     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 807     memset(&info, 0, sizeof(info));
 808     SDL_VERSION(&info.version);
 809
 810     for (i = 0;; i++) {
 811         QemuConsole *con = qemu_console_lookup_by_index(i);
 812         if (!con) {
 813             break;
 814         }
 815     }
 816     sdl2_num_outputs = i;
 817     if (sdl2_num_outputs == 0) {
 818         return;
 819     }
 820     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 821     for (i = 0; i < sdl2_num_outputs; i++) {
 822         QemuConsole *con = qemu_console_lookup_by_index(i);
 823         assert(con != NULL);
 824         if (!qemu_console_is_graphic(con)) {
 825             sdl2_console[i].hidden = true;
 826         }
 827         sdl2_console[i].idx = i;
 828 #ifdef CONFIG_OPENGL
 829         sdl2_console[i].opengl = display_opengl;
 830         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 831 #else
 832         sdl2_console[i].opengl = 0;
 833         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 834 #endif
 835         sdl2_console[i].dcl.con = con;
 836         register_displaychangelistener(&sdl2_console[i].dcl);
 837
 838 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 839         if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 840 #if defined(SDL_VIDEO_DRIVER_WINDOWS)
 841             qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 842 #elif defined(SDL_VIDEO_DRIVER_X11)
 843             qemu_console_set_window_id(con, info.info.x11.window);
 844 #endif
 845         }
 846 #endif
 847     }
 848
 849     /* Load a 32x32x4 image. White pixels are transparent. */
 850     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 851     if (filename) {
 852         SDL_Surface *image = SDL_LoadBMP(filename);
 853         if (image) {
 854             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 855             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 856             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 857         }
 858         g_free(filename);
 859     }
 860
 861     if (full_screen) {
 862         gui_fullscreen = 1;
 863         sdl_grab_start(0);
 864     }
 865
 866     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 867     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 868
 869     gui_grab = 0;
 870
 871     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 872     sdl_cursor_normal = SDL_GetCursor();
 873
 874     atexit(sdl_cleanup);
 875 }