qemu/ui/sdl2.c
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   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
  33static int sdl2_num_outputs;
  34static struct sdl2_console *sdl2_console;
  35
  36static SDL_Surface *guest_sprite_surface;
  37static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  38
  39static int gui_saved_grab;
  40static int gui_fullscreen;
  41static int gui_keysym;
  42static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  43static SDL_Cursor *sdl_cursor_normal;
  44static SDL_Cursor *sdl_cursor_hidden;
  45static int absolute_enabled;
  46static int guest_cursor;
  47static int guest_x, guest_y;
  48static SDL_Cursor *guest_sprite;
  49static Notifier mouse_mode_notifier;
  50
  51#define SDL2_REFRESH_INTERVAL_BUSY 10
  52#define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  53                             / SDL2_REFRESH_INTERVAL_BUSY + 1)
  54
  55static void sdl_update_caption(struct sdl2_console *scon);
  56
  57static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  58{
  59    int i;
  60    for (i = 0; i < sdl2_num_outputs; i++) {
  61        if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  62            return &sdl2_console[i];
  63        }
  64    }
  65    return NULL;
  66}
  67
  68void sdl2_window_create(struct sdl2_console *scon)
  69{
  70    int flags = 0;
  71
  72    if (!scon->surface) {
  73        return;
  74    }
  75    assert(!scon->real_window);
  76
  77    if (gui_fullscreen) {
  78        flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  79    } else {
  80        flags |= SDL_WINDOW_RESIZABLE;
  81    }
  82    if (scon->hidden) {
  83        flags |= SDL_WINDOW_HIDDEN;
  84    }
  85
  86    scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  87                                         SDL_WINDOWPOS_UNDEFINED,
  88                                         surface_width(scon->surface),
  89                                         surface_height(scon->surface),
  90                                         flags);
  91    scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  92    if (scon->opengl) {
  93        scon->winctx = SDL_GL_GetCurrentContext();
  94    }
  95    sdl_update_caption(scon);
  96}
  97
  98void 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
 110void 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
 121static void sdl2_redraw(struct sdl2_console *scon)
 122{
 123    if (scon->opengl) {
 124#ifdef CONFIG_OPENGL
 125        sdl2_gl_redraw(scon);
 126#endif
 127    } else {
 128        sdl2_2d_redraw(scon);
 129    }
 130}
 131
 132static void sdl_update_caption(struct sdl2_console *scon)
 133{
 134    char win_title[1024];
 135    char icon_title[1024];
 136    const char *status = "";
 137
 138    if (!runstate_is_running()) {
 139        status = " [Stopped]";
 140    } else if (gui_grab) {
 141        if (alt_grab) {
 142            status = " - Press Ctrl-Alt-Shift-G to exit grab";
 143        } else if (ctrl_grab) {
 144            status = " - Press Right-Ctrl-G to exit grab";
 145        } else {
 146            status = " - Press Ctrl-Alt-G to exit grab";
 147        }
 148    }
 149
 150    if (qemu_name) {
 151        snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 152                 scon->idx, status);
 153        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 154    } else {
 155        snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 156        snprintf(icon_title, sizeof(icon_title), "QEMU");
 157    }
 158
 159    if (scon->real_window) {
 160        SDL_SetWindowTitle(scon->real_window, win_title);
 161    }
 162}
 163
 164static void sdl_hide_cursor(void)
 165{
 166    if (!cursor_hide) {
 167        return;
 168    }
 169
 170    SDL_ShowCursor(SDL_DISABLE);
 171    SDL_SetCursor(sdl_cursor_hidden);
 172
 173    if (!qemu_input_is_absolute()) {
 174        SDL_SetRelativeMouseMode(SDL_TRUE);
 175    }
 176}
 177
 178static void sdl_show_cursor(void)
 179{
 180    if (!cursor_hide) {
 181        return;
 182    }
 183
 184    if (!qemu_input_is_absolute()) {
 185        SDL_SetRelativeMouseMode(SDL_FALSE);
 186    }
 187
 188    if (guest_cursor &&
 189        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 190        SDL_SetCursor(guest_sprite);
 191    } else {
 192        SDL_SetCursor(sdl_cursor_normal);
 193    }
 194
 195    SDL_ShowCursor(SDL_ENABLE);
 196}
 197
 198static 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
 226static 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
 234static 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
 246static 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            SDL_SetRelativeMouseMode(SDL_FALSE);
 252            absolute_mouse_grab(&sdl2_console[0]);
 253        }
 254    } else if (absolute_enabled) {
 255        if (!gui_fullscreen) {
 256            sdl_grab_end(&sdl2_console[0]);
 257        }
 258        absolute_enabled = 0;
 259    }
 260}
 261
 262static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 263                                 int x, int y, int state)
 264{
 265    static uint32_t bmap[INPUT_BUTTON__MAX] = {
 266        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 267        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 268        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 269    };
 270    static uint32_t prev_state;
 271
 272    if (prev_state != state) {
 273        qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 274        prev_state = state;
 275    }
 276
 277    if (qemu_input_is_absolute()) {
 278        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
 279                             x, 0, surface_width(scon->surface));
 280        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
 281                             y, 0, surface_height(scon->surface));
 282    } else {
 283        if (guest_cursor) {
 284            x -= guest_x;
 285            y -= guest_y;
 286            guest_x += x;
 287            guest_y += y;
 288            dx = x;
 289            dy = y;
 290        }
 291        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 292        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 293    }
 294    qemu_input_event_sync();
 295}
 296
 297static void toggle_full_screen(struct sdl2_console *scon)
 298{
 299    gui_fullscreen = !gui_fullscreen;
 300    if (gui_fullscreen) {
 301        SDL_SetWindowFullscreen(scon->real_window,
 302                                SDL_WINDOW_FULLSCREEN_DESKTOP);
 303        gui_saved_grab = gui_grab;
 304        sdl_grab_start(scon);
 305    } else {
 306        if (!gui_saved_grab) {
 307            sdl_grab_end(scon);
 308        }
 309        SDL_SetWindowFullscreen(scon->real_window, 0);
 310    }
 311    sdl2_redraw(scon);
 312}
 313
 314static int get_mod_state(void)
 315{
 316    SDL_Keymod mod = SDL_GetModState();
 317
 318    if (alt_grab) {
 319        return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
 320            (gui_grab_code | KMOD_LSHIFT);
 321    } else if (ctrl_grab) {
 322        return (mod & KMOD_RCTRL) == KMOD_RCTRL;
 323    } else {
 324        return (mod & gui_grab_code) == gui_grab_code;
 325    }
 326}
 327
 328static void handle_keydown(SDL_Event *ev)
 329{
 330    int win;
 331    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 332    int gui_key_modifier_pressed = get_mod_state();
 333
 334    if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
 335        switch (ev->key.keysym.scancode) {
 336        case SDL_SCANCODE_2:
 337        case SDL_SCANCODE_3:
 338        case SDL_SCANCODE_4:
 339        case SDL_SCANCODE_5:
 340        case SDL_SCANCODE_6:
 341        case SDL_SCANCODE_7:
 342        case SDL_SCANCODE_8:
 343        case SDL_SCANCODE_9:
 344            if (gui_grab) {
 345                sdl_grab_end(scon);
 346            }
 347
 348            win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 349            if (win < sdl2_num_outputs) {
 350                sdl2_console[win].hidden = !sdl2_console[win].hidden;
 351                if (sdl2_console[win].real_window) {
 352                    if (sdl2_console[win].hidden) {
 353                        SDL_HideWindow(sdl2_console[win].real_window);
 354                    } else {
 355                        SDL_ShowWindow(sdl2_console[win].real_window);
 356                    }
 357                }
 358                gui_keysym = 1;
 359            }
 360            break;
 361        case SDL_SCANCODE_F:
 362            toggle_full_screen(scon);
 363            gui_keysym = 1;
 364            break;
 365        case SDL_SCANCODE_G:
 366            gui_keysym = 1;
 367            if (!gui_grab) {
 368                sdl_grab_start(scon);
 369            } else if (!gui_fullscreen) {
 370                sdl_grab_end(scon);
 371            }
 372            break;
 373        case SDL_SCANCODE_U:
 374            sdl2_window_resize(scon);
 375            if (!scon->opengl) {
 376                /* re-create scon->texture */
 377                sdl2_2d_switch(&scon->dcl, scon->surface);
 378            }
 379            gui_keysym = 1;
 380            break;
 381#if 0
 382        case SDL_SCANCODE_KP_PLUS:
 383        case SDL_SCANCODE_KP_MINUS:
 384            if (!gui_fullscreen) {
 385                int scr_w, scr_h;
 386                int width, height;
 387                SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 388
 389                width = MAX(scr_w + (ev->key.keysym.scancode ==
 390                                     SDL_SCANCODE_KP_PLUS ? 50 : -50),
 391                            160);
 392                height = (surface_height(scon->surface) * width) /
 393                    surface_width(scon->surface);
 394                fprintf(stderr, "%s: scale to %dx%d\n",
 395                        __func__, width, height);
 396                sdl_scale(scon, width, height);
 397                sdl2_redraw(scon);
 398                gui_keysym = 1;
 399            }
 400#endif
 401        default:
 402            break;
 403        }
 404    }
 405    if (!gui_keysym) {
 406        sdl2_process_key(scon, &ev->key);
 407    }
 408}
 409
 410static void handle_keyup(SDL_Event *ev)
 411{
 412    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 413    int gui_key_modifier_pressed = get_mod_state();
 414
 415    scon->ignore_hotkeys = false;
 416
 417    if (!gui_key_modifier_pressed) {
 418        gui_keysym = 0;
 419    }
 420    if (!gui_keysym) {
 421        sdl2_process_key(scon, &ev->key);
 422    }
 423}
 424
 425static void handle_textinput(SDL_Event *ev)
 426{
 427    struct sdl2_console *scon = get_scon_from_window(ev->text.windowID);
 428    QemuConsole *con = scon ? scon->dcl.con : NULL;
 429
 430    if (qemu_console_is_graphic(con)) {
 431        return;
 432    }
 433    kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 434}
 435
 436static void handle_mousemotion(SDL_Event *ev)
 437{
 438    int max_x, max_y;
 439    struct sdl2_console *scon = get_scon_from_window(ev->motion.windowID);
 440
 441    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 442        return;
 443    }
 444
 445    if (qemu_input_is_absolute() || absolute_enabled) {
 446        int scr_w, scr_h;
 447        SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 448        max_x = scr_w - 1;
 449        max_y = scr_h - 1;
 450        if (gui_grab && !gui_fullscreen
 451            && (ev->motion.x == 0 || ev->motion.y == 0 ||
 452                ev->motion.x == max_x || ev->motion.y == max_y)) {
 453            sdl_grab_end(scon);
 454        }
 455        if (!gui_grab &&
 456            (ev->motion.x > 0 && ev->motion.x < max_x &&
 457             ev->motion.y > 0 && ev->motion.y < max_y)) {
 458            sdl_grab_start(scon);
 459        }
 460    }
 461    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 462        sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 463                             ev->motion.x, ev->motion.y, ev->motion.state);
 464    }
 465}
 466
 467static void handle_mousebutton(SDL_Event *ev)
 468{
 469    int buttonstate = SDL_GetMouseState(NULL, NULL);
 470    SDL_MouseButtonEvent *bev;
 471    struct sdl2_console *scon = get_scon_from_window(ev->button.windowID);
 472
 473    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 474        return;
 475    }
 476
 477    bev = &ev->button;
 478    if (!gui_grab && !qemu_input_is_absolute()) {
 479        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 480            /* start grabbing all events */
 481            sdl_grab_start(scon);
 482        }
 483    } else {
 484        if (ev->type == SDL_MOUSEBUTTONDOWN) {
 485            buttonstate |= SDL_BUTTON(bev->button);
 486        } else {
 487            buttonstate &= ~SDL_BUTTON(bev->button);
 488        }
 489        sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 490    }
 491}
 492
 493static void handle_mousewheel(SDL_Event *ev)
 494{
 495    struct sdl2_console *scon = get_scon_from_window(ev->wheel.windowID);
 496    SDL_MouseWheelEvent *wev = &ev->wheel;
 497    InputButton btn;
 498
 499    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 500        return;
 501    }
 502
 503    if (wev->y > 0) {
 504        btn = INPUT_BUTTON_WHEEL_UP;
 505    } else if (wev->y < 0) {
 506        btn = INPUT_BUTTON_WHEEL_DOWN;
 507    } else {
 508        return;
 509    }
 510
 511    qemu_input_queue_btn(scon->dcl.con, btn, true);
 512    qemu_input_event_sync();
 513    qemu_input_queue_btn(scon->dcl.con, btn, false);
 514    qemu_input_event_sync();
 515}
 516
 517static void handle_windowevent(SDL_Event *ev)
 518{
 519    struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 520    bool allow_close = true;
 521
 522    if (!scon) {
 523        return;
 524    }
 525
 526    switch (ev->window.event) {
 527    case SDL_WINDOWEVENT_RESIZED:
 528        {
 529            QemuUIInfo info;
 530            memset(&info, 0, sizeof(info));
 531            info.width = ev->window.data1;
 532            info.height = ev->window.data2;
 533            dpy_set_ui_info(scon->dcl.con, &info);
 534        }
 535        sdl2_redraw(scon);
 536        break;
 537    case SDL_WINDOWEVENT_EXPOSED:
 538        sdl2_redraw(scon);
 539        break;
 540    case SDL_WINDOWEVENT_FOCUS_GAINED:
 541    case SDL_WINDOWEVENT_ENTER:
 542        if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 543            absolute_mouse_grab(scon);
 544        }
 545        /* If a new console window opened using a hotkey receives the
 546         * focus, SDL sends another KEYDOWN event to the new window,
 547         * closing the console window immediately after.
 548         *
 549         * Work around this by ignoring further hotkey events until a
 550         * key is released.
 551         */
 552        scon->ignore_hotkeys = get_mod_state();
 553        break;
 554    case SDL_WINDOWEVENT_FOCUS_LOST:
 555        if (gui_grab && !gui_fullscreen) {
 556            sdl_grab_end(scon);
 557        }
 558        break;
 559    case SDL_WINDOWEVENT_RESTORED:
 560        update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 561        break;
 562    case SDL_WINDOWEVENT_MINIMIZED:
 563        update_displaychangelistener(&scon->dcl, 500);
 564        break;
 565    case SDL_WINDOWEVENT_CLOSE:
 566        if (qemu_console_is_graphic(scon->dcl.con)) {
 567            if (scon->opts->has_window_close && !scon->opts->window_close) {
 568                allow_close = false;
 569            }
 570            if (allow_close) {
 571                no_shutdown = 0;
 572                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 573            }
 574        } else {
 575            SDL_HideWindow(scon->real_window);
 576            scon->hidden = true;
 577        }
 578        break;
 579    case SDL_WINDOWEVENT_SHOWN:
 580        scon->hidden = false;
 581        break;
 582    case SDL_WINDOWEVENT_HIDDEN:
 583        scon->hidden = true;
 584        break;
 585    }
 586}
 587
 588void sdl2_poll_events(struct sdl2_console *scon)
 589{
 590    SDL_Event ev1, *ev = &ev1;
 591    bool allow_close = true;
 592    int idle = 1;
 593
 594    if (scon->last_vm_running != runstate_is_running()) {
 595        scon->last_vm_running = runstate_is_running();
 596        sdl_update_caption(scon);
 597    }
 598
 599    while (SDL_PollEvent(ev)) {
 600        switch (ev->type) {
 601        case SDL_KEYDOWN:
 602            idle = 0;
 603            handle_keydown(ev);
 604            break;
 605        case SDL_KEYUP:
 606            idle = 0;
 607            handle_keyup(ev);
 608            break;
 609        case SDL_TEXTINPUT:
 610            idle = 0;
 611            handle_textinput(ev);
 612            break;
 613        case SDL_QUIT:
 614            if (scon->opts->has_window_close && !scon->opts->window_close) {
 615                allow_close = false;
 616            }
 617            if (allow_close) {
 618                no_shutdown = 0;
 619                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 620            }
 621            break;
 622        case SDL_MOUSEMOTION:
 623            idle = 0;
 624            handle_mousemotion(ev);
 625            break;
 626        case SDL_MOUSEBUTTONDOWN:
 627        case SDL_MOUSEBUTTONUP:
 628            idle = 0;
 629            handle_mousebutton(ev);
 630            break;
 631        case SDL_MOUSEWHEEL:
 632            idle = 0;
 633            handle_mousewheel(ev);
 634            break;
 635        case SDL_WINDOWEVENT:
 636            handle_windowevent(ev);
 637            break;
 638        default:
 639            break;
 640        }
 641    }
 642
 643    if (idle) {
 644        if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 645            scon->idle_counter++;
 646            if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 647                scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 648            }
 649        }
 650    } else {
 651        scon->idle_counter = 0;
 652        scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 653    }
 654}
 655
 656static void sdl_mouse_warp(DisplayChangeListener *dcl,
 657                           int x, int y, int on)
 658{
 659    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 660
 661    if (!qemu_console_is_graphic(scon->dcl.con)) {
 662        return;
 663    }
 664
 665    if (on) {
 666        if (!guest_cursor) {
 667            sdl_show_cursor();
 668        }
 669        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 670            SDL_SetCursor(guest_sprite);
 671            if (!qemu_input_is_absolute() && !absolute_enabled) {
 672                SDL_WarpMouseInWindow(scon->real_window, x, y);
 673            }
 674        }
 675    } else if (gui_grab) {
 676        sdl_hide_cursor();
 677    }
 678    guest_cursor = on;
 679    guest_x = x, guest_y = y;
 680}
 681
 682static void sdl_mouse_define(DisplayChangeListener *dcl,
 683                             QEMUCursor *c)
 684{
 685
 686    if (guest_sprite) {
 687        SDL_FreeCursor(guest_sprite);
 688    }
 689
 690    if (guest_sprite_surface) {
 691        SDL_FreeSurface(guest_sprite_surface);
 692    }
 693
 694    guest_sprite_surface =
 695        SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 696                                 0xff0000, 0x00ff00, 0xff, 0xff000000);
 697
 698    if (!guest_sprite_surface) {
 699        fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 700        return;
 701    }
 702    guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 703                                         c->hot_x, c->hot_y);
 704    if (!guest_sprite) {
 705        fprintf(stderr, "Failed to make color cursor from %p\n", c);
 706        return;
 707    }
 708    if (guest_cursor &&
 709        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 710        SDL_SetCursor(guest_sprite);
 711    }
 712}
 713
 714static void sdl_cleanup(void)
 715{
 716    if (guest_sprite) {
 717        SDL_FreeCursor(guest_sprite);
 718    }
 719    SDL_QuitSubSystem(SDL_INIT_VIDEO);
 720}
 721
 722static const DisplayChangeListenerOps dcl_2d_ops = {
 723    .dpy_name             = "sdl2-2d",
 724    .dpy_gfx_update       = sdl2_2d_update,
 725    .dpy_gfx_switch       = sdl2_2d_switch,
 726    .dpy_gfx_check_format = sdl2_2d_check_format,
 727    .dpy_refresh          = sdl2_2d_refresh,
 728    .dpy_mouse_set        = sdl_mouse_warp,
 729    .dpy_cursor_define    = sdl_mouse_define,
 730};
 731
 732#ifdef CONFIG_OPENGL
 733static const DisplayChangeListenerOps dcl_gl_ops = {
 734    .dpy_name                = "sdl2-gl",
 735    .dpy_gfx_update          = sdl2_gl_update,
 736    .dpy_gfx_switch          = sdl2_gl_switch,
 737    .dpy_gfx_check_format    = console_gl_check_format,
 738    .dpy_refresh             = sdl2_gl_refresh,
 739    .dpy_mouse_set           = sdl_mouse_warp,
 740    .dpy_cursor_define       = sdl_mouse_define,
 741
 742    .dpy_gl_ctx_create       = sdl2_gl_create_context,
 743    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 744    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 745    .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 746    .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 747    .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 748    .dpy_gl_update           = sdl2_gl_scanout_flush,
 749};
 750#endif
 751
 752static void sdl2_display_early_init(DisplayOptions *o)
 753{
 754    assert(o->type == DISPLAY_TYPE_SDL);
 755    if (o->has_gl && o->gl) {
 756#ifdef CONFIG_OPENGL
 757        display_opengl = 1;
 758#endif
 759    }
 760}
 761
 762static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 763{
 764    uint8_t data = 0;
 765    char *filename;
 766    int i;
 767    SDL_SysWMinfo info;
 768
 769    assert(o->type == DISPLAY_TYPE_SDL);
 770
 771#ifdef __linux__
 772    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 773     * accessible $DISPLAY to open X11 window.  This is often the case
 774     * when qemu is run using sudo.  But in this case, and when actually
 775     * run in X11 environment, SDL fights with X11 for the video card,
 776     * making current display unavailable, often until reboot.
 777     * So make x11 the default SDL video driver if this variable is unset.
 778     * This is a bit hackish but saves us from bigger problem.
 779     * Maybe it's a good idea to fix this in SDL instead.
 780     */
 781    setenv("SDL_VIDEODRIVER", "x11", 0);
 782#endif
 783
 784    if (SDL_Init(SDL_INIT_VIDEO)) {
 785        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 786                SDL_GetError());
 787        exit(1);
 788    }
 789#ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR /* only available since SDL 2.0.8 */
 790    SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
 791#endif
 792    SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 793    memset(&info, 0, sizeof(info));
 794    SDL_VERSION(&info.version);
 795
 796    gui_fullscreen = o->has_full_screen && o->full_screen;
 797
 798    for (i = 0;; i++) {
 799        QemuConsole *con = qemu_console_lookup_by_index(i);
 800        if (!con) {
 801            break;
 802        }
 803    }
 804    sdl2_num_outputs = i;
 805    if (sdl2_num_outputs == 0) {
 806        return;
 807    }
 808    sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 809    for (i = 0; i < sdl2_num_outputs; i++) {
 810        QemuConsole *con = qemu_console_lookup_by_index(i);
 811        assert(con != NULL);
 812        if (!qemu_console_is_graphic(con) &&
 813            qemu_console_get_index(con) != 0) {
 814            sdl2_console[i].hidden = true;
 815        }
 816        sdl2_console[i].idx = i;
 817        sdl2_console[i].opts = o;
 818#ifdef CONFIG_OPENGL
 819        sdl2_console[i].opengl = display_opengl;
 820        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 821#else
 822        sdl2_console[i].opengl = 0;
 823        sdl2_console[i].dcl.ops = &dcl_2d_ops;
 824#endif
 825        sdl2_console[i].dcl.con = con;
 826        register_displaychangelistener(&sdl2_console[i].dcl);
 827
 828#if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 829        if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 830#if defined(SDL_VIDEO_DRIVER_WINDOWS)
 831            qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 832#elif defined(SDL_VIDEO_DRIVER_X11)
 833            qemu_console_set_window_id(con, info.info.x11.window);
 834#endif
 835        }
 836#endif
 837    }
 838
 839    /* Load a 32x32x4 image. White pixels are transparent. */
 840    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 841    if (filename) {
 842        SDL_Surface *image = SDL_LoadBMP(filename);
 843        if (image) {
 844            uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 845            SDL_SetColorKey(image, SDL_TRUE, colorkey);
 846            SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 847        }
 848        g_free(filename);
 849    }
 850
 851    gui_grab = 0;
 852    if (gui_fullscreen) {
 853        sdl_grab_start(0);
 854    }
 855
 856    mouse_mode_notifier.notify = sdl_mouse_mode_change;
 857    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 858
 859    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 860    sdl_cursor_normal = SDL_GetCursor();
 861
 862    atexit(sdl_cleanup);
 863}
 864
 865static QemuDisplay qemu_display_sdl2 = {
 866    .type       = DISPLAY_TYPE_SDL,
 867    .early_init = sdl2_display_early_init,
 868    .init       = sdl2_display_init,
 869};
 870
 871static void register_sdl1(void)
 872{
 873    qemu_display_register(&qemu_display_sdl2);
 874}
 875
 876type_init(register_sdl1);
 877