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/module.h"
  28#include "qemu/cutils.h"
  29#include "ui/console.h"
  30#include "ui/input.h"
  31#include "ui/sdl2.h"
  32#include "sysemu/runstate.h"
  33#include "sysemu/runstate-action.h"
  34#include "sysemu/sysemu.h"
  35#include "ui/win32-kbd-hook.h"
  36#include "qemu/log.h"
  37
  38static int sdl2_num_outputs;
  39static struct sdl2_console *sdl2_console;
  40
  41static SDL_Surface *guest_sprite_surface;
  42static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  43static bool alt_grab;
  44static bool ctrl_grab;
  45
  46static int gui_saved_grab;
  47static int gui_fullscreen;
  48static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  49static SDL_Cursor *sdl_cursor_normal;
  50static SDL_Cursor *sdl_cursor_hidden;
  51static int absolute_enabled;
  52static int guest_cursor;
  53static int guest_x, guest_y;
  54static SDL_Cursor *guest_sprite;
  55static Notifier mouse_mode_notifier;
  56
  57#define SDL2_REFRESH_INTERVAL_BUSY 10
  58#define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  59                             / SDL2_REFRESH_INTERVAL_BUSY + 1)
  60
  61static void sdl_update_caption(struct sdl2_console *scon);
  62
  63static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  64{
  65    int i;
  66    for (i = 0; i < sdl2_num_outputs; i++) {
  67        if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  68            return &sdl2_console[i];
  69        }
  70    }
  71    return NULL;
  72}
  73
  74void sdl2_window_create(struct sdl2_console *scon)
  75{
  76    int flags = 0;
  77
  78    if (!scon->surface) {
  79        return;
  80    }
  81    assert(!scon->real_window);
  82
  83    if (gui_fullscreen) {
  84        flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  85    } else {
  86        flags |= SDL_WINDOW_RESIZABLE;
  87    }
  88    if (scon->hidden) {
  89        flags |= SDL_WINDOW_HIDDEN;
  90    }
  91#ifdef CONFIG_OPENGL
  92    if (scon->opengl) {
  93        flags |= SDL_WINDOW_OPENGL;
  94    }
  95#endif
  96
  97    scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  98                                         SDL_WINDOWPOS_UNDEFINED,
  99                                         surface_width(scon->surface),
 100                                         surface_height(scon->surface),
 101                                         flags);
 102    scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
 103    if (scon->opengl) {
 104        scon->winctx = SDL_GL_GetCurrentContext();
 105    }
 106    sdl_update_caption(scon);
 107}
 108
 109void sdl2_window_destroy(struct sdl2_console *scon)
 110{
 111    if (!scon->real_window) {
 112        return;
 113    }
 114
 115    SDL_DestroyRenderer(scon->real_renderer);
 116    scon->real_renderer = NULL;
 117    SDL_DestroyWindow(scon->real_window);
 118    scon->real_window = NULL;
 119}
 120
 121void sdl2_window_resize(struct sdl2_console *scon)
 122{
 123    if (!scon->real_window) {
 124        return;
 125    }
 126
 127    SDL_SetWindowSize(scon->real_window,
 128                      surface_width(scon->surface),
 129                      surface_height(scon->surface));
 130}
 131
 132static void sdl2_redraw(struct sdl2_console *scon)
 133{
 134    if (scon->opengl) {
 135#ifdef CONFIG_OPENGL
 136        sdl2_gl_redraw(scon);
 137#endif
 138    } else {
 139        sdl2_2d_redraw(scon);
 140    }
 141}
 142
 143static void sdl_update_caption(struct sdl2_console *scon)
 144{
 145    char win_title[1024];
 146    char icon_title[1024];
 147    const char *status = "";
 148
 149    if (!runstate_is_running()) {
 150        status = " [Stopped]";
 151    } else if (gui_grab) {
 152        if (alt_grab) {
 153            status = " - Press Ctrl-Alt-Shift-G to exit grab";
 154        } else if (ctrl_grab) {
 155            status = " - Press Right-Ctrl-G to exit grab";
 156        } else {
 157            status = " - Press Ctrl-Alt-G to exit grab";
 158        }
 159    }
 160
 161    if (qemu_name) {
 162        snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 163                 scon->idx, status);
 164        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 165    } else {
 166        snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 167        snprintf(icon_title, sizeof(icon_title), "QEMU");
 168    }
 169
 170    if (scon->real_window) {
 171        SDL_SetWindowTitle(scon->real_window, win_title);
 172    }
 173}
 174
 175static void sdl_hide_cursor(struct sdl2_console *scon)
 176{
 177    if (scon->opts->has_show_cursor && scon->opts->show_cursor) {
 178        return;
 179    }
 180
 181    SDL_ShowCursor(SDL_DISABLE);
 182    SDL_SetCursor(sdl_cursor_hidden);
 183
 184    if (!qemu_input_is_absolute()) {
 185        SDL_SetRelativeMouseMode(SDL_TRUE);
 186    }
 187}
 188
 189static void sdl_show_cursor(struct sdl2_console *scon)
 190{
 191    if (scon->opts->has_show_cursor && scon->opts->show_cursor) {
 192        return;
 193    }
 194
 195    if (!qemu_input_is_absolute()) {
 196        SDL_SetRelativeMouseMode(SDL_FALSE);
 197    }
 198
 199    if (guest_cursor &&
 200        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 201        SDL_SetCursor(guest_sprite);
 202    } else {
 203        SDL_SetCursor(sdl_cursor_normal);
 204    }
 205
 206    SDL_ShowCursor(SDL_ENABLE);
 207}
 208
 209static void sdl_grab_start(struct sdl2_console *scon)
 210{
 211    QemuConsole *con = scon ? scon->dcl.con : NULL;
 212
 213    if (!con || !qemu_console_is_graphic(con)) {
 214        return;
 215    }
 216    /*
 217     * If the application is not active, do not try to enter grab state. This
 218     * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 219     * application (SDL bug).
 220     */
 221    if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 222        return;
 223    }
 224    if (guest_cursor) {
 225        SDL_SetCursor(guest_sprite);
 226        if (!qemu_input_is_absolute() && !absolute_enabled) {
 227            SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 228        }
 229    } else {
 230        sdl_hide_cursor(scon);
 231    }
 232    SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 233    gui_grab = 1;
 234    win32_kbd_set_grab(true);
 235    sdl_update_caption(scon);
 236}
 237
 238static void sdl_grab_end(struct sdl2_console *scon)
 239{
 240    SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 241    gui_grab = 0;
 242    win32_kbd_set_grab(false);
 243    sdl_show_cursor(scon);
 244    sdl_update_caption(scon);
 245}
 246
 247static void absolute_mouse_grab(struct sdl2_console *scon)
 248{
 249    int mouse_x, mouse_y;
 250    int scr_w, scr_h;
 251    SDL_GetMouseState(&mouse_x, &mouse_y);
 252    SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 253    if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 254        mouse_y > 0 && mouse_y < scr_h - 1) {
 255        sdl_grab_start(scon);
 256    }
 257}
 258
 259static void sdl_mouse_mode_change(Notifier *notify, void *data)
 260{
 261    if (qemu_input_is_absolute()) {
 262        if (!absolute_enabled) {
 263            absolute_enabled = 1;
 264            SDL_SetRelativeMouseMode(SDL_FALSE);
 265            absolute_mouse_grab(&sdl2_console[0]);
 266        }
 267    } else if (absolute_enabled) {
 268        if (!gui_fullscreen) {
 269            sdl_grab_end(&sdl2_console[0]);
 270        }
 271        absolute_enabled = 0;
 272    }
 273}
 274
 275static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 276                                 int x, int y, int state)
 277{
 278    static uint32_t bmap[INPUT_BUTTON__MAX] = {
 279        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 280        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 281        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 282        [INPUT_BUTTON_SIDE]       = SDL_BUTTON(SDL_BUTTON_X1),
 283        [INPUT_BUTTON_EXTRA]      = SDL_BUTTON(SDL_BUTTON_X2)
 284    };
 285    static uint32_t prev_state;
 286
 287    if (prev_state != state) {
 288        qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 289        prev_state = state;
 290    }
 291
 292    if (qemu_input_is_absolute()) {
 293        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
 294                             x, 0, surface_width(scon->surface));
 295        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
 296                             y, 0, surface_height(scon->surface));
 297    } else {
 298        if (guest_cursor) {
 299            x -= guest_x;
 300            y -= guest_y;
 301            guest_x += x;
 302            guest_y += y;
 303            dx = x;
 304            dy = y;
 305        }
 306        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 307        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 308    }
 309    qemu_input_event_sync();
 310}
 311
 312static void toggle_full_screen(struct sdl2_console *scon)
 313{
 314    gui_fullscreen = !gui_fullscreen;
 315    if (gui_fullscreen) {
 316        SDL_SetWindowFullscreen(scon->real_window,
 317                                SDL_WINDOW_FULLSCREEN_DESKTOP);
 318        gui_saved_grab = gui_grab;
 319        sdl_grab_start(scon);
 320    } else {
 321        if (!gui_saved_grab) {
 322            sdl_grab_end(scon);
 323        }
 324        SDL_SetWindowFullscreen(scon->real_window, 0);
 325    }
 326    sdl2_redraw(scon);
 327}
 328
 329static int get_mod_state(void)
 330{
 331    SDL_Keymod mod = SDL_GetModState();
 332
 333    if (alt_grab) {
 334        return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
 335            (gui_grab_code | KMOD_LSHIFT);
 336    } else if (ctrl_grab) {
 337        return (mod & KMOD_RCTRL) == KMOD_RCTRL;
 338    } else {
 339        return (mod & gui_grab_code) == gui_grab_code;
 340    }
 341}
 342
 343static void *sdl2_win32_get_hwnd(struct sdl2_console *scon)
 344{
 345#ifdef CONFIG_WIN32
 346    SDL_SysWMinfo info;
 347
 348    SDL_VERSION(&info.version);
 349    if (SDL_GetWindowWMInfo(scon->real_window, &info)) {
 350        return info.info.win.window;
 351    }
 352#endif
 353    return NULL;
 354}
 355
 356static void handle_keydown(SDL_Event *ev)
 357{
 358    int win;
 359    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 360    int gui_key_modifier_pressed = get_mod_state();
 361    int gui_keysym = 0;
 362
 363    if (!scon) {
 364        return;
 365    }
 366
 367    if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
 368        switch (ev->key.keysym.scancode) {
 369        case SDL_SCANCODE_2:
 370        case SDL_SCANCODE_3:
 371        case SDL_SCANCODE_4:
 372        case SDL_SCANCODE_5:
 373        case SDL_SCANCODE_6:
 374        case SDL_SCANCODE_7:
 375        case SDL_SCANCODE_8:
 376        case SDL_SCANCODE_9:
 377            if (gui_grab) {
 378                sdl_grab_end(scon);
 379            }
 380
 381            win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 382            if (win < sdl2_num_outputs) {
 383                sdl2_console[win].hidden = !sdl2_console[win].hidden;
 384                if (sdl2_console[win].real_window) {
 385                    if (sdl2_console[win].hidden) {
 386                        SDL_HideWindow(sdl2_console[win].real_window);
 387                    } else {
 388                        SDL_ShowWindow(sdl2_console[win].real_window);
 389                    }
 390                }
 391                gui_keysym = 1;
 392            }
 393            break;
 394        case SDL_SCANCODE_F:
 395            toggle_full_screen(scon);
 396            gui_keysym = 1;
 397            break;
 398        case SDL_SCANCODE_G:
 399            gui_keysym = 1;
 400            if (!gui_grab) {
 401                sdl_grab_start(scon);
 402            } else if (!gui_fullscreen) {
 403                sdl_grab_end(scon);
 404            }
 405            break;
 406        case SDL_SCANCODE_U:
 407            sdl2_window_resize(scon);
 408            if (!scon->opengl) {
 409                /* re-create scon->texture */
 410                sdl2_2d_switch(&scon->dcl, scon->surface);
 411            }
 412            gui_keysym = 1;
 413            break;
 414#if 0
 415        case SDL_SCANCODE_KP_PLUS:
 416        case SDL_SCANCODE_KP_MINUS:
 417            if (!gui_fullscreen) {
 418                int scr_w, scr_h;
 419                int width, height;
 420                SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 421
 422                width = MAX(scr_w + (ev->key.keysym.scancode ==
 423                                     SDL_SCANCODE_KP_PLUS ? 50 : -50),
 424                            160);
 425                height = (surface_height(scon->surface) * width) /
 426                    surface_width(scon->surface);
 427                fprintf(stderr, "%s: scale to %dx%d\n",
 428                        __func__, width, height);
 429                sdl_scale(scon, width, height);
 430                sdl2_redraw(scon);
 431                gui_keysym = 1;
 432            }
 433#endif
 434        default:
 435            break;
 436        }
 437    }
 438    if (!gui_keysym) {
 439        sdl2_process_key(scon, &ev->key);
 440    }
 441}
 442
 443static void handle_keyup(SDL_Event *ev)
 444{
 445    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 446
 447    if (!scon) {
 448        return;
 449    }
 450
 451    scon->ignore_hotkeys = false;
 452    sdl2_process_key(scon, &ev->key);
 453}
 454
 455static void handle_textinput(SDL_Event *ev)
 456{
 457    struct sdl2_console *scon = get_scon_from_window(ev->text.windowID);
 458    QemuConsole *con = scon ? scon->dcl.con : NULL;
 459
 460    if (!con) {
 461        return;
 462    }
 463
 464    if (qemu_console_is_graphic(con)) {
 465        return;
 466    }
 467    kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 468}
 469
 470static void handle_mousemotion(SDL_Event *ev)
 471{
 472    int max_x, max_y;
 473    struct sdl2_console *scon = get_scon_from_window(ev->motion.windowID);
 474
 475    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 476        return;
 477    }
 478
 479    if (qemu_input_is_absolute() || absolute_enabled) {
 480        int scr_w, scr_h;
 481        SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 482        max_x = scr_w - 1;
 483        max_y = scr_h - 1;
 484        if (gui_grab && !gui_fullscreen
 485            && (ev->motion.x == 0 || ev->motion.y == 0 ||
 486                ev->motion.x == max_x || ev->motion.y == max_y)) {
 487            sdl_grab_end(scon);
 488        }
 489        if (!gui_grab &&
 490            (ev->motion.x > 0 && ev->motion.x < max_x &&
 491             ev->motion.y > 0 && ev->motion.y < max_y)) {
 492            sdl_grab_start(scon);
 493        }
 494    }
 495    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 496        sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 497                             ev->motion.x, ev->motion.y, ev->motion.state);
 498    }
 499}
 500
 501static void handle_mousebutton(SDL_Event *ev)
 502{
 503    int buttonstate = SDL_GetMouseState(NULL, NULL);
 504    SDL_MouseButtonEvent *bev;
 505    struct sdl2_console *scon = get_scon_from_window(ev->button.windowID);
 506
 507    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 508        return;
 509    }
 510
 511    bev = &ev->button;
 512    if (!gui_grab && !qemu_input_is_absolute()) {
 513        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 514            /* start grabbing all events */
 515            sdl_grab_start(scon);
 516        }
 517    } else {
 518        if (ev->type == SDL_MOUSEBUTTONDOWN) {
 519            buttonstate |= SDL_BUTTON(bev->button);
 520        } else {
 521            buttonstate &= ~SDL_BUTTON(bev->button);
 522        }
 523        sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 524    }
 525}
 526
 527static void handle_mousewheel(SDL_Event *ev)
 528{
 529    struct sdl2_console *scon = get_scon_from_window(ev->wheel.windowID);
 530    SDL_MouseWheelEvent *wev = &ev->wheel;
 531    InputButton btn;
 532
 533    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 534        return;
 535    }
 536
 537    if (wev->y > 0) {
 538        btn = INPUT_BUTTON_WHEEL_UP;
 539    } else if (wev->y < 0) {
 540        btn = INPUT_BUTTON_WHEEL_DOWN;
 541    } else if (wev->x < 0) {
 542        btn = INPUT_BUTTON_WHEEL_RIGHT;
 543    } else if (wev->x > 0) {
 544        btn = INPUT_BUTTON_WHEEL_LEFT;
 545    } else {
 546        return;
 547    }
 548
 549    qemu_input_queue_btn(scon->dcl.con, btn, true);
 550    qemu_input_event_sync();
 551    qemu_input_queue_btn(scon->dcl.con, btn, false);
 552    qemu_input_event_sync();
 553}
 554
 555static void handle_windowevent(SDL_Event *ev)
 556{
 557    struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 558    bool allow_close = true;
 559
 560    if (!scon) {
 561        return;
 562    }
 563
 564    switch (ev->window.event) {
 565    case SDL_WINDOWEVENT_RESIZED:
 566        {
 567            QemuUIInfo info;
 568            memset(&info, 0, sizeof(info));
 569            info.width = ev->window.data1;
 570            info.height = ev->window.data2;
 571            dpy_set_ui_info(scon->dcl.con, &info, true);
 572        }
 573        sdl2_redraw(scon);
 574        break;
 575    case SDL_WINDOWEVENT_EXPOSED:
 576        sdl2_redraw(scon);
 577        break;
 578    case SDL_WINDOWEVENT_FOCUS_GAINED:
 579        win32_kbd_set_grab(gui_grab);
 580        if (qemu_console_is_graphic(scon->dcl.con)) {
 581            win32_kbd_set_window(sdl2_win32_get_hwnd(scon));
 582        }
 583        /* fall through */
 584    case SDL_WINDOWEVENT_ENTER:
 585        if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 586            absolute_mouse_grab(scon);
 587        }
 588        /* If a new console window opened using a hotkey receives the
 589         * focus, SDL sends another KEYDOWN event to the new window,
 590         * closing the console window immediately after.
 591         *
 592         * Work around this by ignoring further hotkey events until a
 593         * key is released.
 594         */
 595        scon->ignore_hotkeys = get_mod_state();
 596        break;
 597    case SDL_WINDOWEVENT_FOCUS_LOST:
 598        if (qemu_console_is_graphic(scon->dcl.con)) {
 599            win32_kbd_set_window(NULL);
 600        }
 601        if (gui_grab && !gui_fullscreen) {
 602            sdl_grab_end(scon);
 603        }
 604        break;
 605    case SDL_WINDOWEVENT_RESTORED:
 606        update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 607        break;
 608    case SDL_WINDOWEVENT_MINIMIZED:
 609        update_displaychangelistener(&scon->dcl, 500);
 610        break;
 611    case SDL_WINDOWEVENT_CLOSE:
 612        if (qemu_console_is_graphic(scon->dcl.con)) {
 613            if (scon->opts->has_window_close && !scon->opts->window_close) {
 614                allow_close = false;
 615            }
 616            if (allow_close) {
 617                shutdown_action = SHUTDOWN_ACTION_POWEROFF;
 618                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 619            }
 620        } else {
 621            SDL_HideWindow(scon->real_window);
 622            scon->hidden = true;
 623        }
 624        break;
 625    case SDL_WINDOWEVENT_SHOWN:
 626        scon->hidden = false;
 627        break;
 628    case SDL_WINDOWEVENT_HIDDEN:
 629        scon->hidden = true;
 630        break;
 631    }
 632}
 633
 634void sdl2_poll_events(struct sdl2_console *scon)
 635{
 636    SDL_Event ev1, *ev = &ev1;
 637    bool allow_close = true;
 638    int idle = 1;
 639
 640    if (scon->last_vm_running != runstate_is_running()) {
 641        scon->last_vm_running = runstate_is_running();
 642        sdl_update_caption(scon);
 643    }
 644
 645    while (SDL_PollEvent(ev)) {
 646        switch (ev->type) {
 647        case SDL_KEYDOWN:
 648            idle = 0;
 649            handle_keydown(ev);
 650            break;
 651        case SDL_KEYUP:
 652            idle = 0;
 653            handle_keyup(ev);
 654            break;
 655        case SDL_TEXTINPUT:
 656            idle = 0;
 657            handle_textinput(ev);
 658            break;
 659        case SDL_QUIT:
 660            if (scon->opts->has_window_close && !scon->opts->window_close) {
 661                allow_close = false;
 662            }
 663            if (allow_close) {
 664                shutdown_action = SHUTDOWN_ACTION_POWEROFF;
 665                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 666            }
 667            break;
 668        case SDL_MOUSEMOTION:
 669            idle = 0;
 670            handle_mousemotion(ev);
 671            break;
 672        case SDL_MOUSEBUTTONDOWN:
 673        case SDL_MOUSEBUTTONUP:
 674            idle = 0;
 675            handle_mousebutton(ev);
 676            break;
 677        case SDL_MOUSEWHEEL:
 678            idle = 0;
 679            handle_mousewheel(ev);
 680            break;
 681        case SDL_WINDOWEVENT:
 682            handle_windowevent(ev);
 683            break;
 684        default:
 685            break;
 686        }
 687    }
 688
 689    if (idle) {
 690        if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 691            scon->idle_counter++;
 692            if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 693                scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 694            }
 695        }
 696    } else {
 697        scon->idle_counter = 0;
 698        scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 699    }
 700}
 701
 702static void sdl_mouse_warp(DisplayChangeListener *dcl,
 703                           int x, int y, int on)
 704{
 705    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 706
 707    if (!qemu_console_is_graphic(scon->dcl.con)) {
 708        return;
 709    }
 710
 711    if (on) {
 712        if (!guest_cursor) {
 713            sdl_show_cursor(scon);
 714        }
 715        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 716            SDL_SetCursor(guest_sprite);
 717            if (!qemu_input_is_absolute() && !absolute_enabled) {
 718                SDL_WarpMouseInWindow(scon->real_window, x, y);
 719            }
 720        }
 721    } else if (gui_grab) {
 722        sdl_hide_cursor(scon);
 723    }
 724    guest_cursor = on;
 725    guest_x = x, guest_y = y;
 726}
 727
 728static void sdl_mouse_define(DisplayChangeListener *dcl,
 729                             QEMUCursor *c)
 730{
 731
 732    if (guest_sprite) {
 733        SDL_FreeCursor(guest_sprite);
 734    }
 735
 736    if (guest_sprite_surface) {
 737        SDL_FreeSurface(guest_sprite_surface);
 738    }
 739
 740    guest_sprite_surface =
 741        SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 742                                 0xff0000, 0x00ff00, 0xff, 0xff000000);
 743
 744    if (!guest_sprite_surface) {
 745        fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 746        return;
 747    }
 748    guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 749                                         c->hot_x, c->hot_y);
 750    if (!guest_sprite) {
 751        fprintf(stderr, "Failed to make color cursor from %p\n", c);
 752        return;
 753    }
 754    if (guest_cursor &&
 755        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 756        SDL_SetCursor(guest_sprite);
 757    }
 758}
 759
 760static void sdl_cleanup(void)
 761{
 762    if (guest_sprite) {
 763        SDL_FreeCursor(guest_sprite);
 764    }
 765    SDL_QuitSubSystem(SDL_INIT_VIDEO);
 766}
 767
 768static const DisplayChangeListenerOps dcl_2d_ops = {
 769    .dpy_name             = "sdl2-2d",
 770    .dpy_gfx_update       = sdl2_2d_update,
 771    .dpy_gfx_switch       = sdl2_2d_switch,
 772    .dpy_gfx_check_format = sdl2_2d_check_format,
 773    .dpy_refresh          = sdl2_2d_refresh,
 774    .dpy_mouse_set        = sdl_mouse_warp,
 775    .dpy_cursor_define    = sdl_mouse_define,
 776};
 777
 778#ifdef CONFIG_OPENGL
 779static const DisplayChangeListenerOps dcl_gl_ops = {
 780    .dpy_name                = "sdl2-gl",
 781    .dpy_gfx_update          = sdl2_gl_update,
 782    .dpy_gfx_switch          = sdl2_gl_switch,
 783    .dpy_gfx_check_format    = console_gl_check_format,
 784    .dpy_refresh             = sdl2_gl_refresh,
 785    .dpy_mouse_set           = sdl_mouse_warp,
 786    .dpy_cursor_define       = sdl_mouse_define,
 787
 788    .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 789    .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 790    .dpy_gl_update           = sdl2_gl_scanout_flush,
 791};
 792
 793static bool
 794sdl2_gl_is_compatible_dcl(DisplayGLCtx *dgc,
 795                          DisplayChangeListener *dcl)
 796{
 797    return dcl->ops == &dcl_gl_ops;
 798}
 799
 800static const DisplayGLCtxOps gl_ctx_ops = {
 801    .dpy_gl_ctx_is_compatible_dcl = sdl2_gl_is_compatible_dcl,
 802    .dpy_gl_ctx_create       = sdl2_gl_create_context,
 803    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 804    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 805};
 806#endif
 807
 808static void sdl2_display_early_init(DisplayOptions *o)
 809{
 810    assert(o->type == DISPLAY_TYPE_SDL);
 811    if (o->has_gl && o->gl) {
 812#ifdef CONFIG_OPENGL
 813        display_opengl = 1;
 814#endif
 815    }
 816}
 817
 818static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 819{
 820    uint8_t data = 0;
 821    int i;
 822    SDL_SysWMinfo info;
 823    SDL_Surface *icon = NULL;
 824    char *dir;
 825
 826    assert(o->type == DISPLAY_TYPE_SDL);
 827
 828#ifdef __linux__
 829    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 830     * accessible $DISPLAY to open X11 window.  This is often the case
 831     * when qemu is run using sudo.  But in this case, and when actually
 832     * run in X11 environment, SDL fights with X11 for the video card,
 833     * making current display unavailable, often until reboot.
 834     * So make x11 the default SDL video driver if this variable is unset.
 835     * This is a bit hackish but saves us from bigger problem.
 836     * Maybe it's a good idea to fix this in SDL instead.
 837     */
 838    if (!g_setenv("SDL_VIDEODRIVER", "x11", 0)) {
 839        fprintf(stderr, "Could not set SDL_VIDEODRIVER environment variable\n");
 840        exit(1);
 841    }
 842#endif
 843
 844    if (SDL_Init(SDL_INIT_VIDEO)) {
 845        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 846                SDL_GetError());
 847        exit(1);
 848    }
 849#ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR /* only available since SDL 2.0.8 */
 850    SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
 851#endif
 852#ifndef CONFIG_WIN32
 853    /* QEMU uses its own low level keyboard hook procecure on Windows */
 854    SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 855#endif
 856#ifdef SDL_HINT_ALLOW_ALT_TAB_WHILE_GRABBED
 857    SDL_SetHint(SDL_HINT_ALLOW_ALT_TAB_WHILE_GRABBED, "0");
 858#endif
 859    SDL_SetHint(SDL_HINT_WINDOWS_NO_CLOSE_ON_ALT_F4, "1");
 860    memset(&info, 0, sizeof(info));
 861    SDL_VERSION(&info.version);
 862
 863    gui_fullscreen = o->has_full_screen && o->full_screen;
 864
 865    if (o->u.sdl.has_grab_mod) {
 866        if (o->u.sdl.grab_mod == HOT_KEY_MOD_LSHIFT_LCTRL_LALT) {
 867            alt_grab = true;
 868        } else if (o->u.sdl.grab_mod == HOT_KEY_MOD_RCTRL) {
 869            ctrl_grab = true;
 870        }
 871    }
 872
 873    for (i = 0;; i++) {
 874        QemuConsole *con = qemu_console_lookup_by_index(i);
 875        if (!con) {
 876            break;
 877        }
 878    }
 879    sdl2_num_outputs = i;
 880    if (sdl2_num_outputs == 0) {
 881        return;
 882    }
 883    sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 884    for (i = 0; i < sdl2_num_outputs; i++) {
 885        QemuConsole *con = qemu_console_lookup_by_index(i);
 886        assert(con != NULL);
 887        if (!qemu_console_is_graphic(con) &&
 888            qemu_console_get_index(con) != 0) {
 889            sdl2_console[i].hidden = true;
 890        }
 891        sdl2_console[i].idx = i;
 892        sdl2_console[i].opts = o;
 893#ifdef CONFIG_OPENGL
 894        sdl2_console[i].opengl = display_opengl;
 895        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 896        sdl2_console[i].dgc.ops = display_opengl ? &gl_ctx_ops : NULL;
 897#else
 898        sdl2_console[i].opengl = 0;
 899        sdl2_console[i].dcl.ops = &dcl_2d_ops;
 900#endif
 901        sdl2_console[i].dcl.con = con;
 902        sdl2_console[i].kbd = qkbd_state_init(con);
 903        if (display_opengl) {
 904            qemu_console_set_display_gl_ctx(con, &sdl2_console[i].dgc);
 905        }
 906        register_displaychangelistener(&sdl2_console[i].dcl);
 907
 908#if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 909        if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 910#if defined(SDL_VIDEO_DRIVER_WINDOWS)
 911            qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 912#elif defined(SDL_VIDEO_DRIVER_X11)
 913            qemu_console_set_window_id(con, info.info.x11.window);
 914#endif
 915        }
 916#endif
 917    }
 918
 919#ifdef CONFIG_SDL_IMAGE
 920    dir = get_relocated_path(CONFIG_QEMU_ICONDIR "/hicolor/128x128/apps/qemu.png");
 921    icon = IMG_Load(dir);
 922#else
 923    /* Load a 32x32x4 image. White pixels are transparent. */
 924    dir = get_relocated_path(CONFIG_QEMU_ICONDIR "/hicolor/32x32/apps/qemu.bmp");
 925    icon = SDL_LoadBMP(dir);
 926    if (icon) {
 927        uint32_t colorkey = SDL_MapRGB(icon->format, 255, 255, 255);
 928        SDL_SetColorKey(icon, SDL_TRUE, colorkey);
 929    }
 930#endif
 931    g_free(dir);
 932    if (icon) {
 933        SDL_SetWindowIcon(sdl2_console[0].real_window, icon);
 934    }
 935
 936    mouse_mode_notifier.notify = sdl_mouse_mode_change;
 937    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 938
 939    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 940    sdl_cursor_normal = SDL_GetCursor();
 941
 942    if (gui_fullscreen) {
 943        sdl_grab_start(&sdl2_console[0]);
 944    }
 945
 946    atexit(sdl_cleanup);
 947}
 948
 949static QemuDisplay qemu_display_sdl2 = {
 950    .type       = DISPLAY_TYPE_SDL,
 951    .early_init = sdl2_display_early_init,
 952    .init       = sdl2_display_init,
 953};
 954
 955static void register_sdl1(void)
 956{
 957    qemu_display_register(&qemu_display_sdl2);
 958}
 959
 960type_init(register_sdl1);
 961
 962#ifdef CONFIG_OPENGL
 963module_dep("ui-opengl");
 964#endif
 965