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         int scr_w, scr_h;
 280         int max_w = 0, max_h = 0;
 281         int off_x = 0, off_y = 0;
 282         int cur_off_x = 0, cur_off_y = 0;
 283         int i;
 284
 285         for (i = 0; i < sdl2_num_outputs; i++) {
 286             struct sdl2_console *thiscon = &sdl2_console[i];
 287             if (thiscon->real_window && thiscon->surface) {
 288                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 289                 cur_off_x = thiscon->x;
 290                 cur_off_y = thiscon->y;
 291                 if (scr_w + cur_off_x > max_w) {
 292                     max_w = scr_w + cur_off_x;
 293                 }
 294                 if (scr_h + cur_off_y > max_h) {
 295                     max_h = scr_h + cur_off_y;
 296                 }
 297                 if (i == scon->idx) {
 298                     off_x = cur_off_x;
 299                     off_y = cur_off_y;
 300                 }
 301             }
 302         }
 303         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, 0, max_w);
 304         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, 0, max_h);
 305     } else {
 306         if (guest_cursor) {
 307             x -= guest_x;
 308             y -= guest_y;
 309             guest_x += x;
 310             guest_y += y;
 311             dx = x;
 312             dy = y;
 313         }
 314         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 315         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 316     }
 317     qemu_input_event_sync();
 318 }
 319
 320 static void toggle_full_screen(struct sdl2_console *scon)
 321 {
 322     gui_fullscreen = !gui_fullscreen;
 323     if (gui_fullscreen) {
 324         SDL_SetWindowFullscreen(scon->real_window,
 325                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 326         gui_saved_grab = gui_grab;
 327         sdl_grab_start(scon);
 328     } else {
 329         if (!gui_saved_grab) {
 330             sdl_grab_end(scon);
 331         }
 332         SDL_SetWindowFullscreen(scon->real_window, 0);
 333     }
 334     sdl2_redraw(scon);
 335 }
 336
 337 static void handle_keydown(SDL_Event *ev)
 338 {
 339     int mod_state, win;
 340     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 341
 342     if (alt_grab) {
 343         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 344             (gui_grab_code | KMOD_LSHIFT);
 345     } else if (ctrl_grab) {
 346         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 347     } else {
 348         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 349     }
 350     gui_key_modifier_pressed = mod_state;
 351
 352     if (gui_key_modifier_pressed) {
 353         switch (ev->key.keysym.scancode) {
 354         case SDL_SCANCODE_2:
 355         case SDL_SCANCODE_3:
 356         case SDL_SCANCODE_4:
 357         case SDL_SCANCODE_5:
 358         case SDL_SCANCODE_6:
 359         case SDL_SCANCODE_7:
 360         case SDL_SCANCODE_8:
 361         case SDL_SCANCODE_9:
 362             if (gui_grab) {
 363                 sdl_grab_end(scon);
 364             }
 365
 366             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 367             if (win < sdl2_num_outputs) {
 368                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 369                 if (sdl2_console[win].real_window) {
 370                     if (sdl2_console[win].hidden) {
 371                         SDL_HideWindow(sdl2_console[win].real_window);
 372                     } else {
 373                         SDL_ShowWindow(sdl2_console[win].real_window);
 374                     }
 375                 }
 376                 gui_keysym = 1;
 377             }
 378             break;
 379         case SDL_SCANCODE_F:
 380             toggle_full_screen(scon);
 381             gui_keysym = 1;
 382             break;
 383         case SDL_SCANCODE_U:
 384             sdl2_window_destroy(scon);
 385             sdl2_window_create(scon);
 386             if (!scon->opengl) {
 387                 /* re-create scon->texture */
 388                 sdl2_2d_switch(&scon->dcl, scon->surface);
 389             }
 390             gui_keysym = 1;
 391             break;
 392 #if 0
 393         case SDL_SCANCODE_KP_PLUS:
 394         case SDL_SCANCODE_KP_MINUS:
 395             if (!gui_fullscreen) {
 396                 int scr_w, scr_h;
 397                 int width, height;
 398                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 399
 400                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 401                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 402                             160);
 403                 height = (surface_height(scon->surface) * width) /
 404                     surface_width(scon->surface);
 405                 fprintf(stderr, "%s: scale to %dx%d\n",
 406                         __func__, width, height);
 407                 sdl_scale(scon, width, height);
 408                 sdl2_redraw(scon);
 409                 gui_keysym = 1;
 410             }
 411 #endif
 412         default:
 413             break;
 414         }
 415     }
 416     if (!gui_keysym) {
 417         sdl2_process_key(scon, &ev->key);
 418     }
 419 }
 420
 421 static void handle_keyup(SDL_Event *ev)
 422 {
 423     int mod_state;
 424     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 425
 426     if (!alt_grab) {
 427         mod_state = (ev->key.keysym.mod & gui_grab_code);
 428     } else {
 429         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 430     }
 431     if (!mod_state && gui_key_modifier_pressed) {
 432         gui_key_modifier_pressed = 0;
 433         if (gui_keysym == 0) {
 434             /* exit/enter grab if pressing Ctrl-Alt */
 435             if (!gui_grab) {
 436                 sdl_grab_start(scon);
 437             } else if (!gui_fullscreen) {
 438                 sdl_grab_end(scon);
 439             }
 440             /* SDL does not send back all the modifiers key, so we must
 441              * correct it. */
 442             sdl2_reset_keys(scon);
 443             return;
 444         }
 445         sdl2_reset_keys(scon);
 446         gui_keysym = 0;
 447     }
 448     if (!gui_keysym) {
 449         sdl2_process_key(scon, &ev->key);
 450     }
 451 }
 452
 453 static void handle_textinput(SDL_Event *ev)
 454 {
 455     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 456     QemuConsole *con = scon ? scon->dcl.con : NULL;
 457
 458     if (qemu_console_is_graphic(con)) {
 459         return;
 460     }
 461     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 462 }
 463
 464 static void handle_mousemotion(SDL_Event *ev)
 465 {
 466     int max_x, max_y;
 467     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 468
 469     if (qemu_input_is_absolute() || absolute_enabled) {
 470         int scr_w, scr_h;
 471         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 472         max_x = scr_w - 1;
 473         max_y = scr_h - 1;
 474         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 475                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 476             sdl_grab_end(scon);
 477         }
 478         if (!gui_grab &&
 479             (ev->motion.x > 0 && ev->motion.x < max_x &&
 480              ev->motion.y > 0 && ev->motion.y < max_y)) {
 481             sdl_grab_start(scon);
 482         }
 483     }
 484     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 485         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 486                              ev->motion.x, ev->motion.y, ev->motion.state);
 487     }
 488 }
 489
 490 static void handle_mousebutton(SDL_Event *ev)
 491 {
 492     int buttonstate = SDL_GetMouseState(NULL, NULL);
 493     SDL_MouseButtonEvent *bev;
 494     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 495
 496     bev = &ev->button;
 497     if (!gui_grab && !qemu_input_is_absolute()) {
 498         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 499             /* start grabbing all events */
 500             sdl_grab_start(scon);
 501         }
 502     } else {
 503         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 504             buttonstate |= SDL_BUTTON(bev->button);
 505         } else {
 506             buttonstate &= ~SDL_BUTTON(bev->button);
 507         }
 508         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 509     }
 510 }
 511
 512 static void handle_mousewheel(SDL_Event *ev)
 513 {
 514     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 515     SDL_MouseWheelEvent *wev = &ev->wheel;
 516     InputButton btn;
 517
 518     if (wev->y > 0) {
 519         btn = INPUT_BUTTON_WHEEL_UP;
 520     } else if (wev->y < 0) {
 521         btn = INPUT_BUTTON_WHEEL_DOWN;
 522     } else {
 523         return;
 524     }
 525
 526     qemu_input_queue_btn(scon->dcl.con, btn, true);
 527     qemu_input_event_sync();
 528     qemu_input_queue_btn(scon->dcl.con, btn, false);
 529     qemu_input_event_sync();
 530 }
 531
 532 static void handle_windowevent(SDL_Event *ev)
 533 {
 534     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 535
 536     if (!scon) {
 537         return;
 538     }
 539
 540     switch (ev->window.event) {
 541     case SDL_WINDOWEVENT_RESIZED:
 542         {
 543             QemuUIInfo info;
 544             memset(&info, 0, sizeof(info));
 545             info.width = ev->window.data1;
 546             info.height = ev->window.data2;
 547             dpy_set_ui_info(scon->dcl.con, &info);
 548         }
 549         sdl2_redraw(scon);
 550         break;
 551     case SDL_WINDOWEVENT_EXPOSED:
 552         sdl2_redraw(scon);
 553         break;
 554     case SDL_WINDOWEVENT_FOCUS_GAINED:
 555     case SDL_WINDOWEVENT_ENTER:
 556         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 557             absolute_mouse_grab(scon);
 558         }
 559         break;
 560     case SDL_WINDOWEVENT_FOCUS_LOST:
 561         if (gui_grab && !gui_fullscreen) {
 562             sdl_grab_end(scon);
 563         }
 564         break;
 565     case SDL_WINDOWEVENT_RESTORED:
 566         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 567         break;
 568     case SDL_WINDOWEVENT_MINIMIZED:
 569         update_displaychangelistener(&scon->dcl, 500);
 570         break;
 571     case SDL_WINDOWEVENT_CLOSE:
 572         if (qemu_console_is_graphic(scon->dcl.con)) {
 573             if (!no_quit) {
 574                 no_shutdown = 0;
 575                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 576             }
 577         } else {
 578             SDL_HideWindow(scon->real_window);
 579             scon->hidden = true;
 580         }
 581         break;
 582     case SDL_WINDOWEVENT_SHOWN:
 583         if (scon->hidden) {
 584             SDL_HideWindow(scon->real_window);
 585         }
 586         break;
 587     case SDL_WINDOWEVENT_HIDDEN:
 588         if (!scon->hidden) {
 589             SDL_ShowWindow(scon->real_window);
 590         }
 591         break;
 592     }
 593 }
 594
 595 void sdl2_poll_events(struct sdl2_console *scon)
 596 {
 597     SDL_Event ev1, *ev = &ev1;
 598     int idle = 1;
 599
 600     if (scon->last_vm_running != runstate_is_running()) {
 601         scon->last_vm_running = runstate_is_running();
 602         sdl_update_caption(scon);
 603     }
 604
 605     while (SDL_PollEvent(ev)) {
 606         switch (ev->type) {
 607         case SDL_KEYDOWN:
 608             idle = 0;
 609             handle_keydown(ev);
 610             break;
 611         case SDL_KEYUP:
 612             idle = 0;
 613             handle_keyup(ev);
 614             break;
 615         case SDL_TEXTINPUT:
 616             idle = 0;
 617             handle_textinput(ev);
 618             break;
 619         case SDL_QUIT:
 620             if (!no_quit) {
 621                 no_shutdown = 0;
 622                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 623             }
 624             break;
 625         case SDL_MOUSEMOTION:
 626             idle = 0;
 627             handle_mousemotion(ev);
 628             break;
 629         case SDL_MOUSEBUTTONDOWN:
 630         case SDL_MOUSEBUTTONUP:
 631             idle = 0;
 632             handle_mousebutton(ev);
 633             break;
 634         case SDL_MOUSEWHEEL:
 635             idle = 0;
 636             handle_mousewheel(ev);
 637             break;
 638         case SDL_WINDOWEVENT:
 639             handle_windowevent(ev);
 640             break;
 641         default:
 642             break;
 643         }
 644     }
 645
 646     if (idle) {
 647         if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 648             scon->idle_counter++;
 649             if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 650                 scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 651             }
 652         }
 653     } else {
 654         scon->idle_counter = 0;
 655         scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 656     }
 657 }
 658
 659 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 660                            int x, int y, int on)
 661 {
 662     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 663     if (on) {
 664         if (!guest_cursor) {
 665             sdl_show_cursor();
 666         }
 667         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 668             SDL_SetCursor(guest_sprite);
 669             if (!qemu_input_is_absolute() && !absolute_enabled) {
 670                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 671             }
 672         }
 673     } else if (gui_grab) {
 674         sdl_hide_cursor();
 675     }
 676     guest_cursor = on;
 677     guest_x = x, guest_y = y;
 678 }
 679
 680 static void sdl_mouse_define(DisplayChangeListener *dcl,
 681                              QEMUCursor *c)
 682 {
 683
 684     if (guest_sprite) {
 685         SDL_FreeCursor(guest_sprite);
 686     }
 687
 688     if (guest_sprite_surface) {
 689         SDL_FreeSurface(guest_sprite_surface);
 690     }
 691
 692     guest_sprite_surface =
 693         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 694                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 695
 696     if (!guest_sprite_surface) {
 697         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 698         return;
 699     }
 700     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 701                                          c->hot_x, c->hot_y);
 702     if (!guest_sprite) {
 703         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 704         return;
 705     }
 706     if (guest_cursor &&
 707         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 708         SDL_SetCursor(guest_sprite);
 709     }
 710 }
 711
 712 static void sdl_cleanup(void)
 713 {
 714     if (guest_sprite) {
 715         SDL_FreeCursor(guest_sprite);
 716     }
 717     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 718 }
 719
 720 static const DisplayChangeListenerOps dcl_2d_ops = {
 721     .dpy_name             = "sdl2-2d",
 722     .dpy_gfx_update       = sdl2_2d_update,
 723     .dpy_gfx_switch       = sdl2_2d_switch,
 724     .dpy_gfx_check_format = sdl2_2d_check_format,
 725     .dpy_refresh          = sdl2_2d_refresh,
 726     .dpy_mouse_set        = sdl_mouse_warp,
 727     .dpy_cursor_define    = sdl_mouse_define,
 728 };
 729
 730 #ifdef CONFIG_OPENGL
 731 static const DisplayChangeListenerOps dcl_gl_ops = {
 732     .dpy_name                = "sdl2-gl",
 733     .dpy_gfx_update          = sdl2_gl_update,
 734     .dpy_gfx_switch          = sdl2_gl_switch,
 735     .dpy_gfx_check_format    = console_gl_check_format,
 736     .dpy_refresh             = sdl2_gl_refresh,
 737     .dpy_mouse_set           = sdl_mouse_warp,
 738     .dpy_cursor_define       = sdl_mouse_define,
 739
 740     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 741     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 742     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 743     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 744     .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 745     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 746     .dpy_gl_update           = sdl2_gl_scanout_flush,
 747 };
 748 #endif
 749
 750 void sdl_display_early_init(int opengl)
 751 {
 752     switch (opengl) {
 753     case -1: /* default */
 754     case 0:  /* off */
 755         break;
 756     case 1: /* on */
 757 #ifdef CONFIG_OPENGL
 758         display_opengl = 1;
 759 #endif
 760         break;
 761     default:
 762         g_assert_not_reached();
 763         break;
 764     }
 765 }
 766
 767 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 768 {
 769     int flags;
 770     uint8_t data = 0;
 771     char *filename;
 772     int i;
 773     SDL_SysWMinfo info;
 774
 775     if (no_frame) {
 776         gui_noframe = 1;
 777     }
 778
 779 #ifdef __linux__
 780     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 781      * accessible $DISPLAY to open X11 window.  This is often the case
 782      * when qemu is run using sudo.  But in this case, and when actually
 783      * run in X11 environment, SDL fights with X11 for the video card,
 784      * making current display unavailable, often until reboot.
 785      * So make x11 the default SDL video driver if this variable is unset.
 786      * This is a bit hackish but saves us from bigger problem.
 787      * Maybe it's a good idea to fix this in SDL instead.
 788      */
 789     setenv("SDL_VIDEODRIVER", "x11", 0);
 790 #endif
 791
 792     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 793     if (SDL_Init(flags)) {
 794         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 795                 SDL_GetError());
 796         exit(1);
 797     }
 798     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 799     memset(&info, 0, sizeof(info));
 800     SDL_VERSION(&info.version);
 801
 802     for (i = 0;; i++) {
 803         QemuConsole *con = qemu_console_lookup_by_index(i);
 804         if (!con) {
 805             break;
 806         }
 807     }
 808     sdl2_num_outputs = i;
 809     if (sdl2_num_outputs == 0) {
 810         return;
 811     }
 812     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 813     for (i = 0; i < sdl2_num_outputs; i++) {
 814         QemuConsole *con = qemu_console_lookup_by_index(i);
 815         assert(con != NULL);
 816         if (!qemu_console_is_graphic(con)) {
 817             sdl2_console[i].hidden = true;
 818         }
 819         sdl2_console[i].idx = i;
 820 #ifdef CONFIG_OPENGL
 821         sdl2_console[i].opengl = display_opengl;
 822         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 823 #else
 824         sdl2_console[i].opengl = 0;
 825         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 826 #endif
 827         sdl2_console[i].dcl.con = con;
 828         register_displaychangelistener(&sdl2_console[i].dcl);
 829
 830 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 831         if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 832 #if defined(SDL_VIDEO_DRIVER_WINDOWS)
 833             qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 834 #elif defined(SDL_VIDEO_DRIVER_X11)
 835             qemu_console_set_window_id(con, info.info.x11.window);
 836 #endif
 837         }
 838 #endif
 839     }
 840
 841     /* Load a 32x32x4 image. White pixels are transparent. */
 842     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 843     if (filename) {
 844         SDL_Surface *image = SDL_LoadBMP(filename);
 845         if (image) {
 846             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 847             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 848             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 849         }
 850         g_free(filename);
 851     }
 852
 853     if (full_screen) {
 854         gui_fullscreen = 1;
 855         sdl_grab_start(0);
 856     }
 857
 858     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 859     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 860
 861     gui_grab = 0;
 862
 863     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 864     sdl_cursor_normal = SDL_GetCursor();
 865
 866     atexit(sdl_cleanup);
 867 }