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 /* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
  27 #undef WIN32_LEAN_AND_MEAN
  28
  29 #include <SDL.h>
  30 #include <SDL_syswm.h>
  31
  32 #include "qemu-common.h"
  33 #include "ui/console.h"
  34 #include "ui/input.h"
  35 #include "ui/sdl2.h"
  36 #include "sysemu/sysemu.h"
  37
  38 static int sdl2_num_outputs;
  39 static struct sdl2_console *sdl2_console;
  40
  41 static SDL_Surface *guest_sprite_surface;
  42 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  43
  44 static int gui_saved_grab;
  45 static int gui_fullscreen;
  46 static int gui_noframe;
  47 static int gui_key_modifier_pressed;
  48 static int gui_keysym;
  49 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  50 static SDL_Cursor *sdl_cursor_normal;
  51 static SDL_Cursor *sdl_cursor_hidden;
  52 static int absolute_enabled;
  53 static int guest_cursor;
  54 static int guest_x, guest_y;
  55 static SDL_Cursor *guest_sprite;
  56 static Notifier mouse_mode_notifier;
  57
  58 static void sdl_update_caption(struct sdl2_console *scon);
  59
  60 static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  61 {
  62     int i;
  63     for (i = 0; i < sdl2_num_outputs; i++) {
  64         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  65             return &sdl2_console[i];
  66         }
  67     }
  68     return NULL;
  69 }
  70
  71 void sdl2_window_create(struct sdl2_console *scon)
  72 {
  73     int flags = 0;
  74
  75     if (!scon->surface) {
  76         return;
  77     }
  78     assert(!scon->real_window);
  79
  80     if (gui_fullscreen) {
  81         flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  82     } else {
  83         flags |= SDL_WINDOW_RESIZABLE;
  84     }
  85     if (scon->hidden) {
  86         flags |= SDL_WINDOW_HIDDEN;
  87     }
  88
  89     scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  90                                          SDL_WINDOWPOS_UNDEFINED,
  91                                          surface_width(scon->surface),
  92                                          surface_height(scon->surface),
  93                                          flags);
  94     scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  95     sdl_update_caption(scon);
  96 }
  97
  98 void sdl2_window_destroy(struct sdl2_console *scon)
  99 {
 100     if (!scon->real_window) {
 101         return;
 102     }
 103
 104     SDL_DestroyRenderer(scon->real_renderer);
 105     scon->real_renderer = NULL;
 106     SDL_DestroyWindow(scon->real_window);
 107     scon->real_window = NULL;
 108 }
 109
 110 void sdl2_window_resize(struct sdl2_console *scon)
 111 {
 112     if (!scon->real_window) {
 113         return;
 114     }
 115
 116     SDL_SetWindowSize(scon->real_window,
 117                       surface_width(scon->surface),
 118                       surface_height(scon->surface));
 119 }
 120
 121 static void sdl_update_caption(struct sdl2_console *scon)
 122 {
 123     char win_title[1024];
 124     char icon_title[1024];
 125     const char *status = "";
 126
 127     if (!runstate_is_running()) {
 128         status = " [Stopped]";
 129     } else if (gui_grab) {
 130         if (alt_grab) {
 131             status = " - Press Ctrl-Alt-Shift to exit grab";
 132         } else if (ctrl_grab) {
 133             status = " - Press Right-Ctrl to exit grab";
 134         } else {
 135             status = " - Press Ctrl-Alt to exit grab";
 136         }
 137     }
 138
 139     if (qemu_name) {
 140         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 141                  scon->idx, status);
 142         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 143     } else {
 144         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 145         snprintf(icon_title, sizeof(icon_title), "QEMU");
 146     }
 147
 148     if (scon->real_window) {
 149         SDL_SetWindowTitle(scon->real_window, win_title);
 150     }
 151 }
 152
 153 static void sdl_hide_cursor(void)
 154 {
 155     if (!cursor_hide) {
 156         return;
 157     }
 158
 159     if (qemu_input_is_absolute()) {
 160         SDL_ShowCursor(1);
 161         SDL_SetCursor(sdl_cursor_hidden);
 162     } else {
 163         SDL_SetRelativeMouseMode(SDL_TRUE);
 164     }
 165 }
 166
 167 static void sdl_show_cursor(void)
 168 {
 169     if (!cursor_hide) {
 170         return;
 171     }
 172
 173     if (!qemu_input_is_absolute()) {
 174         SDL_SetRelativeMouseMode(SDL_FALSE);
 175         SDL_ShowCursor(1);
 176         if (guest_cursor &&
 177             (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 178             SDL_SetCursor(guest_sprite);
 179         } else {
 180             SDL_SetCursor(sdl_cursor_normal);
 181         }
 182     }
 183 }
 184
 185 static void sdl_grab_start(struct sdl2_console *scon)
 186 {
 187     QemuConsole *con = scon ? scon->dcl.con : NULL;
 188
 189     if (!con || !qemu_console_is_graphic(con)) {
 190         return;
 191     }
 192     /*
 193      * If the application is not active, do not try to enter grab state. This
 194      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 195      * application (SDL bug).
 196      */
 197     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 198         return;
 199     }
 200     if (guest_cursor) {
 201         SDL_SetCursor(guest_sprite);
 202         if (!qemu_input_is_absolute() && !absolute_enabled) {
 203             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 204         }
 205     } else {
 206         sdl_hide_cursor();
 207     }
 208     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 209     gui_grab = 1;
 210     sdl_update_caption(scon);
 211 }
 212
 213 static void sdl_grab_end(struct sdl2_console *scon)
 214 {
 215     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 216     gui_grab = 0;
 217     sdl_show_cursor();
 218     sdl_update_caption(scon);
 219 }
 220
 221 static void absolute_mouse_grab(struct sdl2_console *scon)
 222 {
 223     int mouse_x, mouse_y;
 224     int scr_w, scr_h;
 225     SDL_GetMouseState(&mouse_x, &mouse_y);
 226     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 227     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 228         mouse_y > 0 && mouse_y < scr_h - 1) {
 229         sdl_grab_start(scon);
 230     }
 231 }
 232
 233 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 234 {
 235     if (qemu_input_is_absolute()) {
 236         if (!absolute_enabled) {
 237             absolute_enabled = 1;
 238             absolute_mouse_grab(&sdl2_console[0]);
 239         }
 240     } else if (absolute_enabled) {
 241         if (!gui_fullscreen) {
 242             sdl_grab_end(&sdl2_console[0]);
 243         }
 244         absolute_enabled = 0;
 245     }
 246 }
 247
 248 static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 249                                  int x, int y, int state)
 250 {
 251     static uint32_t bmap[INPUT_BUTTON_MAX] = {
 252         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 253         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 254         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 255     };
 256     static uint32_t prev_state;
 257
 258     if (prev_state != state) {
 259         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 260         prev_state = state;
 261     }
 262
 263     if (qemu_input_is_absolute()) {
 264         int scr_w, scr_h;
 265         int max_w = 0, max_h = 0;
 266         int off_x = 0, off_y = 0;
 267         int cur_off_x = 0, cur_off_y = 0;
 268         int i;
 269
 270         for (i = 0; i < sdl2_num_outputs; i++) {
 271             struct sdl2_console *thiscon = &sdl2_console[i];
 272             if (thiscon->real_window && thiscon->surface) {
 273                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 274                 cur_off_x = thiscon->x;
 275                 cur_off_y = thiscon->y;
 276                 if (scr_w + cur_off_x > max_w) {
 277                     max_w = scr_w + cur_off_x;
 278                 }
 279                 if (scr_h + cur_off_y > max_h) {
 280                     max_h = scr_h + cur_off_y;
 281                 }
 282                 if (i == scon->idx) {
 283                     off_x = cur_off_x;
 284                     off_y = cur_off_y;
 285                 }
 286             }
 287         }
 288         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 289         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 290     } else {
 291         if (guest_cursor) {
 292             x -= guest_x;
 293             y -= guest_y;
 294             guest_x += x;
 295             guest_y += y;
 296             dx = x;
 297             dy = y;
 298         }
 299         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 300         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 301     }
 302     qemu_input_event_sync();
 303 }
 304
 305 static void toggle_full_screen(struct sdl2_console *scon)
 306 {
 307     gui_fullscreen = !gui_fullscreen;
 308     if (gui_fullscreen) {
 309         SDL_SetWindowFullscreen(scon->real_window,
 310                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 311         gui_saved_grab = gui_grab;
 312         sdl_grab_start(scon);
 313     } else {
 314         if (!gui_saved_grab) {
 315             sdl_grab_end(scon);
 316         }
 317         SDL_SetWindowFullscreen(scon->real_window, 0);
 318     }
 319     sdl2_2d_redraw(scon);
 320 }
 321
 322 static void handle_keydown(SDL_Event *ev)
 323 {
 324     int mod_state, win;
 325     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 326
 327     if (alt_grab) {
 328         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 329             (gui_grab_code | KMOD_LSHIFT);
 330     } else if (ctrl_grab) {
 331         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 332     } else {
 333         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 334     }
 335     gui_key_modifier_pressed = mod_state;
 336
 337     if (gui_key_modifier_pressed) {
 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             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 348             if (win < sdl2_num_outputs) {
 349                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 350                 if (sdl2_console[win].real_window) {
 351                     if (sdl2_console[win].hidden) {
 352                         SDL_HideWindow(sdl2_console[win].real_window);
 353                     } else {
 354                         SDL_ShowWindow(sdl2_console[win].real_window);
 355                     }
 356                 }
 357                 gui_keysym = 1;
 358             }
 359             break;
 360         case SDL_SCANCODE_F:
 361             toggle_full_screen(scon);
 362             gui_keysym = 1;
 363             break;
 364         case SDL_SCANCODE_U:
 365             sdl2_window_destroy(scon);
 366             sdl2_window_create(scon);
 367             /* re-create texture */
 368             sdl2_2d_switch(&scon->dcl, scon->surface);
 369             gui_keysym = 1;
 370             break;
 371 #if 0
 372         case SDL_SCANCODE_KP_PLUS:
 373         case SDL_SCANCODE_KP_MINUS:
 374             if (!gui_fullscreen) {
 375                 int scr_w, scr_h;
 376                 int width, height;
 377                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 378
 379                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 380                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 381                             160);
 382                 height = (surface_height(scon->surface) * width) /
 383                     surface_width(scon->surface);
 384                 fprintf(stderr, "%s: scale to %dx%d\n",
 385                         __func__, width, height);
 386                 sdl_scale(scon, width, height);
 387                 sdl2_2d_redraw(scon);
 388                 gui_keysym = 1;
 389             }
 390 #endif
 391         default:
 392             break;
 393         }
 394     }
 395     if (!gui_keysym) {
 396         sdl2_process_key(scon, &ev->key);
 397     }
 398 }
 399
 400 static void handle_keyup(SDL_Event *ev)
 401 {
 402     int mod_state;
 403     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 404
 405     if (!alt_grab) {
 406         mod_state = (ev->key.keysym.mod & gui_grab_code);
 407     } else {
 408         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 409     }
 410     if (!mod_state && gui_key_modifier_pressed) {
 411         gui_key_modifier_pressed = 0;
 412         if (gui_keysym == 0) {
 413             /* exit/enter grab if pressing Ctrl-Alt */
 414             if (!gui_grab) {
 415                 sdl_grab_start(scon);
 416             } else if (!gui_fullscreen) {
 417                 sdl_grab_end(scon);
 418             }
 419             /* SDL does not send back all the modifiers key, so we must
 420              * correct it. */
 421             sdl2_reset_keys(scon);
 422             return;
 423         }
 424         gui_keysym = 0;
 425     }
 426     if (!gui_keysym) {
 427         sdl2_process_key(scon, &ev->key);
 428     }
 429 }
 430
 431 static void handle_textinput(SDL_Event *ev)
 432 {
 433     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 434     QemuConsole *con = scon ? scon->dcl.con : NULL;
 435
 436     if (qemu_console_is_graphic(con)) {
 437         return;
 438     }
 439     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 440 }
 441
 442 static void handle_mousemotion(SDL_Event *ev)
 443 {
 444     int max_x, max_y;
 445     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 446
 447     if (qemu_input_is_absolute() || absolute_enabled) {
 448         int scr_w, scr_h;
 449         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 450         max_x = scr_w - 1;
 451         max_y = scr_h - 1;
 452         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 453                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 454             sdl_grab_end(scon);
 455         }
 456         if (!gui_grab &&
 457             (ev->motion.x > 0 && ev->motion.x < max_x &&
 458              ev->motion.y > 0 && ev->motion.y < max_y)) {
 459             sdl_grab_start(scon);
 460         }
 461     }
 462     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 463         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 464                              ev->motion.x, ev->motion.y, ev->motion.state);
 465     }
 466 }
 467
 468 static void handle_mousebutton(SDL_Event *ev)
 469 {
 470     int buttonstate = SDL_GetMouseState(NULL, NULL);
 471     SDL_MouseButtonEvent *bev;
 472     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 473
 474     bev = &ev->button;
 475     if (!gui_grab && !qemu_input_is_absolute()) {
 476         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 477             /* start grabbing all events */
 478             sdl_grab_start(scon);
 479         }
 480     } else {
 481         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 482             buttonstate |= SDL_BUTTON(bev->button);
 483         } else {
 484             buttonstate &= ~SDL_BUTTON(bev->button);
 485         }
 486         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 487     }
 488 }
 489
 490 static void handle_mousewheel(SDL_Event *ev)
 491 {
 492     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 493     SDL_MouseWheelEvent *wev = &ev->wheel;
 494     InputButton btn;
 495
 496     if (wev->y > 0) {
 497         btn = INPUT_BUTTON_WHEEL_UP;
 498     } else if (wev->y < 0) {
 499         btn = INPUT_BUTTON_WHEEL_DOWN;
 500     } else {
 501         return;
 502     }
 503
 504     qemu_input_queue_btn(scon->dcl.con, btn, true);
 505     qemu_input_event_sync();
 506     qemu_input_queue_btn(scon->dcl.con, btn, false);
 507     qemu_input_event_sync();
 508 }
 509
 510 static void handle_windowevent(SDL_Event *ev)
 511 {
 512     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 513
 514     switch (ev->window.event) {
 515     case SDL_WINDOWEVENT_RESIZED:
 516         {
 517             QemuUIInfo info;
 518             memset(&info, 0, sizeof(info));
 519             info.width = ev->window.data1;
 520             info.height = ev->window.data2;
 521             dpy_set_ui_info(scon->dcl.con, &info);
 522         }
 523         sdl2_2d_redraw(scon);
 524         break;
 525     case SDL_WINDOWEVENT_EXPOSED:
 526         sdl2_2d_redraw(scon);
 527         break;
 528     case SDL_WINDOWEVENT_FOCUS_GAINED:
 529     case SDL_WINDOWEVENT_ENTER:
 530         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 531             absolute_mouse_grab(scon);
 532         }
 533         break;
 534     case SDL_WINDOWEVENT_FOCUS_LOST:
 535         if (gui_grab && !gui_fullscreen) {
 536             sdl_grab_end(scon);
 537         }
 538         break;
 539     case SDL_WINDOWEVENT_RESTORED:
 540         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 541         break;
 542     case SDL_WINDOWEVENT_MINIMIZED:
 543         update_displaychangelistener(&scon->dcl, 500);
 544         break;
 545     case SDL_WINDOWEVENT_CLOSE:
 546         if (!no_quit) {
 547             no_shutdown = 0;
 548             qemu_system_shutdown_request();
 549         }
 550         break;
 551     case SDL_WINDOWEVENT_SHOWN:
 552         if (scon->hidden) {
 553             SDL_HideWindow(scon->real_window);
 554         }
 555         break;
 556     case SDL_WINDOWEVENT_HIDDEN:
 557         if (!scon->hidden) {
 558             SDL_ShowWindow(scon->real_window);
 559         }
 560         break;
 561     }
 562 }
 563
 564 void sdl2_poll_events(struct sdl2_console *scon)
 565 {
 566     SDL_Event ev1, *ev = &ev1;
 567
 568     if (scon->last_vm_running != runstate_is_running()) {
 569         scon->last_vm_running = runstate_is_running();
 570         sdl_update_caption(scon);
 571     }
 572
 573     while (SDL_PollEvent(ev)) {
 574         switch (ev->type) {
 575         case SDL_KEYDOWN:
 576             handle_keydown(ev);
 577             break;
 578         case SDL_KEYUP:
 579             handle_keyup(ev);
 580             break;
 581         case SDL_TEXTINPUT:
 582             handle_textinput(ev);
 583             break;
 584         case SDL_QUIT:
 585             if (!no_quit) {
 586                 no_shutdown = 0;
 587                 qemu_system_shutdown_request();
 588             }
 589             break;
 590         case SDL_MOUSEMOTION:
 591             handle_mousemotion(ev);
 592             break;
 593         case SDL_MOUSEBUTTONDOWN:
 594         case SDL_MOUSEBUTTONUP:
 595             handle_mousebutton(ev);
 596             break;
 597         case SDL_MOUSEWHEEL:
 598             handle_mousewheel(ev);
 599             break;
 600         case SDL_WINDOWEVENT:
 601             handle_windowevent(ev);
 602             break;
 603         default:
 604             break;
 605         }
 606     }
 607 }
 608
 609 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 610                            int x, int y, int on)
 611 {
 612     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 613     if (on) {
 614         if (!guest_cursor) {
 615             sdl_show_cursor();
 616         }
 617         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 618             SDL_SetCursor(guest_sprite);
 619             if (!qemu_input_is_absolute() && !absolute_enabled) {
 620                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 621             }
 622         }
 623     } else if (gui_grab) {
 624         sdl_hide_cursor();
 625     }
 626     guest_cursor = on;
 627     guest_x = x, guest_y = y;
 628 }
 629
 630 static void sdl_mouse_define(DisplayChangeListener *dcl,
 631                              QEMUCursor *c)
 632 {
 633
 634     if (guest_sprite) {
 635         SDL_FreeCursor(guest_sprite);
 636     }
 637
 638     if (guest_sprite_surface) {
 639         SDL_FreeSurface(guest_sprite_surface);
 640     }
 641
 642     guest_sprite_surface =
 643         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 644                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 645
 646     if (!guest_sprite_surface) {
 647         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 648         return;
 649     }
 650     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 651                                          c->hot_x, c->hot_y);
 652     if (!guest_sprite) {
 653         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 654         return;
 655     }
 656     if (guest_cursor &&
 657         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 658         SDL_SetCursor(guest_sprite);
 659     }
 660 }
 661
 662 static void sdl_cleanup(void)
 663 {
 664     if (guest_sprite) {
 665         SDL_FreeCursor(guest_sprite);
 666     }
 667     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 668 }
 669
 670 static const DisplayChangeListenerOps dcl_2d_ops = {
 671     .dpy_name             = "sdl2-2d",
 672     .dpy_gfx_update       = sdl2_2d_update,
 673     .dpy_gfx_switch       = sdl2_2d_switch,
 674     .dpy_gfx_check_format = sdl2_2d_check_format,
 675     .dpy_refresh          = sdl2_2d_refresh,
 676     .dpy_mouse_set        = sdl_mouse_warp,
 677     .dpy_cursor_define    = sdl_mouse_define,
 678 };
 679
 680 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 681 {
 682     int flags;
 683     uint8_t data = 0;
 684     char *filename;
 685     int i;
 686
 687     if (no_frame) {
 688         gui_noframe = 1;
 689     }
 690
 691 #ifdef __linux__
 692     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 693      * accessible $DISPLAY to open X11 window.  This is often the case
 694      * when qemu is run using sudo.  But in this case, and when actually
 695      * run in X11 environment, SDL fights with X11 for the video card,
 696      * making current display unavailable, often until reboot.
 697      * So make x11 the default SDL video driver if this variable is unset.
 698      * This is a bit hackish but saves us from bigger problem.
 699      * Maybe it's a good idea to fix this in SDL instead.
 700      */
 701     setenv("SDL_VIDEODRIVER", "x11", 0);
 702 #endif
 703
 704     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 705     if (SDL_Init(flags)) {
 706         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 707                 SDL_GetError());
 708         exit(1);
 709     }
 710     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 711
 712     for (i = 0;; i++) {
 713         QemuConsole *con = qemu_console_lookup_by_index(i);
 714         if (!con) {
 715             break;
 716         }
 717     }
 718     sdl2_num_outputs = i;
 719     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 720     for (i = 0; i < sdl2_num_outputs; i++) {
 721         QemuConsole *con = qemu_console_lookup_by_index(i);
 722         if (!qemu_console_is_graphic(con)) {
 723             sdl2_console[i].hidden = true;
 724         }
 725         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 726         sdl2_console[i].dcl.con = con;
 727         register_displaychangelistener(&sdl2_console[i].dcl);
 728         sdl2_console[i].idx = i;
 729     }
 730
 731     /* Load a 32x32x4 image. White pixels are transparent. */
 732     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 733     if (filename) {
 734         SDL_Surface *image = SDL_LoadBMP(filename);
 735         if (image) {
 736             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 737             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 738             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 739         }
 740         g_free(filename);
 741     }
 742
 743     if (full_screen) {
 744         gui_fullscreen = 1;
 745         sdl_grab_start(0);
 746     }
 747
 748     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 749     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 750
 751     gui_grab = 0;
 752
 753     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 754     sdl_cursor_normal = SDL_GetCursor();
 755
 756     atexit(sdl_cleanup);
 757 }