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 "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_grab_code = KMOD_LALT | KMOD_LCTRL;
  42static SDL_Cursor *sdl_cursor_normal;
  43static SDL_Cursor *sdl_cursor_hidden;
  44static int absolute_enabled;
  45static int guest_cursor;
  46static int guest_x, guest_y;
  47static SDL_Cursor *guest_sprite;
  48static Notifier mouse_mode_notifier;
  49
  50#define SDL2_REFRESH_INTERVAL_BUSY 10
  51#define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  52                             / SDL2_REFRESH_INTERVAL_BUSY + 1)
  53
  54static void sdl_update_caption(struct sdl2_console *scon);
  55
  56static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  57{
  58    int i;
  59    for (i = 0; i < sdl2_num_outputs; i++) {
  60        if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  61            return &sdl2_console[i];
  62        }
  63    }
  64    return NULL;
  65}
  66
  67void sdl2_window_create(struct sdl2_console *scon)
  68{
  69    int flags = 0;
  70
  71    if (!scon->surface) {
  72        return;
  73    }
  74    assert(!scon->real_window);
  75
  76    if (gui_fullscreen) {
  77        flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  78    } else {
  79        flags |= SDL_WINDOW_RESIZABLE;
  80    }
  81    if (scon->hidden) {
  82        flags |= SDL_WINDOW_HIDDEN;
  83    }
  84
  85    scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  86                                         SDL_WINDOWPOS_UNDEFINED,
  87                                         surface_width(scon->surface),
  88                                         surface_height(scon->surface),
  89                                         flags);
  90    scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  91    if (scon->opengl) {
  92        scon->winctx = SDL_GL_GetCurrentContext();
  93    }
  94    sdl_update_caption(scon);
  95}
  96
  97void sdl2_window_destroy(struct sdl2_console *scon)
  98{
  99    if (!scon->real_window) {
 100        return;
 101    }
 102
 103    SDL_DestroyRenderer(scon->real_renderer);
 104    scon->real_renderer = NULL;
 105    SDL_DestroyWindow(scon->real_window);
 106    scon->real_window = NULL;
 107}
 108
 109void sdl2_window_resize(struct sdl2_console *scon)
 110{
 111    if (!scon->real_window) {
 112        return;
 113    }
 114
 115    SDL_SetWindowSize(scon->real_window,
 116                      surface_width(scon->surface),
 117                      surface_height(scon->surface));
 118}
 119
 120static void sdl2_redraw(struct sdl2_console *scon)
 121{
 122    if (scon->opengl) {
 123#ifdef CONFIG_OPENGL
 124        sdl2_gl_redraw(scon);
 125#endif
 126    } else {
 127        sdl2_2d_redraw(scon);
 128    }
 129}
 130
 131static void sdl_update_caption(struct sdl2_console *scon)
 132{
 133    char win_title[1024];
 134    char icon_title[1024];
 135    const char *status = "";
 136
 137    if (!runstate_is_running()) {
 138        status = " [Stopped]";
 139    } else if (gui_grab) {
 140        if (alt_grab) {
 141            status = " - Press Ctrl-Alt-Shift-G to exit grab";
 142        } else if (ctrl_grab) {
 143            status = " - Press Right-Ctrl-G to exit grab";
 144        } else {
 145            status = " - Press Ctrl-Alt-G to exit grab";
 146        }
 147    }
 148
 149    if (qemu_name) {
 150        snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 151                 scon->idx, status);
 152        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 153    } else {
 154        snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 155        snprintf(icon_title, sizeof(icon_title), "QEMU");
 156    }
 157
 158    if (scon->real_window) {
 159        SDL_SetWindowTitle(scon->real_window, win_title);
 160    }
 161}
 162
 163static void sdl_hide_cursor(void)
 164{
 165    if (!cursor_hide) {
 166        return;
 167    }
 168
 169    SDL_ShowCursor(SDL_DISABLE);
 170    SDL_SetCursor(sdl_cursor_hidden);
 171
 172    if (!qemu_input_is_absolute()) {
 173        SDL_SetRelativeMouseMode(SDL_TRUE);
 174    }
 175}
 176
 177static void sdl_show_cursor(void)
 178{
 179    if (!cursor_hide) {
 180        return;
 181    }
 182
 183    if (!qemu_input_is_absolute()) {
 184        SDL_SetRelativeMouseMode(SDL_FALSE);
 185    }
 186
 187    if (guest_cursor &&
 188        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 189        SDL_SetCursor(guest_sprite);
 190    } else {
 191        SDL_SetCursor(sdl_cursor_normal);
 192    }
 193
 194    SDL_ShowCursor(SDL_ENABLE);
 195}
 196
 197static void sdl_grab_start(struct sdl2_console *scon)
 198{
 199    QemuConsole *con = scon ? scon->dcl.con : NULL;
 200
 201    if (!con || !qemu_console_is_graphic(con)) {
 202        return;
 203    }
 204    /*
 205     * If the application is not active, do not try to enter grab state. This
 206     * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 207     * application (SDL bug).
 208     */
 209    if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 210        return;
 211    }
 212    if (guest_cursor) {
 213        SDL_SetCursor(guest_sprite);
 214        if (!qemu_input_is_absolute() && !absolute_enabled) {
 215            SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 216        }
 217    } else {
 218        sdl_hide_cursor();
 219    }
 220    SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 221    gui_grab = 1;
 222    sdl_update_caption(scon);
 223}
 224
 225static void sdl_grab_end(struct sdl2_console *scon)
 226{
 227    SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 228    gui_grab = 0;
 229    sdl_show_cursor();
 230    sdl_update_caption(scon);
 231}
 232
 233static void absolute_mouse_grab(struct sdl2_console *scon)
 234{
 235    int mouse_x, mouse_y;
 236    int scr_w, scr_h;
 237    SDL_GetMouseState(&mouse_x, &mouse_y);
 238    SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 239    if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 240        mouse_y > 0 && mouse_y < scr_h - 1) {
 241        sdl_grab_start(scon);
 242    }
 243}
 244
 245static void sdl_mouse_mode_change(Notifier *notify, void *data)
 246{
 247    if (qemu_input_is_absolute()) {
 248        if (!absolute_enabled) {
 249            absolute_enabled = 1;
 250            SDL_SetRelativeMouseMode(SDL_FALSE);
 251            absolute_mouse_grab(&sdl2_console[0]);
 252        }
 253    } else if (absolute_enabled) {
 254        if (!gui_fullscreen) {
 255            sdl_grab_end(&sdl2_console[0]);
 256        }
 257        absolute_enabled = 0;
 258    }
 259}
 260
 261static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 262                                 int x, int y, int state)
 263{
 264    static uint32_t bmap[INPUT_BUTTON__MAX] = {
 265        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 266        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 267        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 268    };
 269    static uint32_t prev_state;
 270
 271    if (prev_state != state) {
 272        qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 273        prev_state = state;
 274    }
 275
 276    if (qemu_input_is_absolute()) {
 277        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
 278                             x, 0, surface_width(scon->surface));
 279        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
 280                             y, 0, surface_height(scon->surface));
 281    } else {
 282        if (guest_cursor) {
 283            x -= guest_x;
 284            y -= guest_y;
 285            guest_x += x;
 286            guest_y += y;
 287            dx = x;
 288            dy = y;
 289        }
 290        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 291        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 292    }
 293    qemu_input_event_sync();
 294}
 295
 296static void toggle_full_screen(struct sdl2_console *scon)
 297{
 298    gui_fullscreen = !gui_fullscreen;
 299    if (gui_fullscreen) {
 300        SDL_SetWindowFullscreen(scon->real_window,
 301                                SDL_WINDOW_FULLSCREEN_DESKTOP);
 302        gui_saved_grab = gui_grab;
 303        sdl_grab_start(scon);
 304    } else {
 305        if (!gui_saved_grab) {
 306            sdl_grab_end(scon);
 307        }
 308        SDL_SetWindowFullscreen(scon->real_window, 0);
 309    }
 310    sdl2_redraw(scon);
 311}
 312
 313static int get_mod_state(void)
 314{
 315    SDL_Keymod mod = SDL_GetModState();
 316
 317    if (alt_grab) {
 318        return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
 319            (gui_grab_code | KMOD_LSHIFT);
 320    } else if (ctrl_grab) {
 321        return (mod & KMOD_RCTRL) == KMOD_RCTRL;
 322    } else {
 323        return (mod & gui_grab_code) == gui_grab_code;
 324    }
 325}
 326
 327static void handle_keydown(SDL_Event *ev)
 328{
 329    int win;
 330    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 331    int gui_key_modifier_pressed = get_mod_state();
 332    int gui_keysym = 0;
 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
 414    scon->ignore_hotkeys = false;
 415    sdl2_process_key(scon, &ev->key);
 416}
 417
 418static void handle_textinput(SDL_Event *ev)
 419{
 420    struct sdl2_console *scon = get_scon_from_window(ev->text.windowID);
 421    QemuConsole *con = scon ? scon->dcl.con : NULL;
 422
 423    if (qemu_console_is_graphic(con)) {
 424        return;
 425    }
 426    kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 427}
 428
 429static void handle_mousemotion(SDL_Event *ev)
 430{
 431    int max_x, max_y;
 432    struct sdl2_console *scon = get_scon_from_window(ev->motion.windowID);
 433
 434    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 435        return;
 436    }
 437
 438    if (qemu_input_is_absolute() || absolute_enabled) {
 439        int scr_w, scr_h;
 440        SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 441        max_x = scr_w - 1;
 442        max_y = scr_h - 1;
 443        if (gui_grab && !gui_fullscreen
 444            && (ev->motion.x == 0 || ev->motion.y == 0 ||
 445                ev->motion.x == max_x || ev->motion.y == max_y)) {
 446            sdl_grab_end(scon);
 447        }
 448        if (!gui_grab &&
 449            (ev->motion.x > 0 && ev->motion.x < max_x &&
 450             ev->motion.y > 0 && ev->motion.y < max_y)) {
 451            sdl_grab_start(scon);
 452        }
 453    }
 454    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 455        sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 456                             ev->motion.x, ev->motion.y, ev->motion.state);
 457    }
 458}
 459
 460static void handle_mousebutton(SDL_Event *ev)
 461{
 462    int buttonstate = SDL_GetMouseState(NULL, NULL);
 463    SDL_MouseButtonEvent *bev;
 464    struct sdl2_console *scon = get_scon_from_window(ev->button.windowID);
 465
 466    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 467        return;
 468    }
 469
 470    bev = &ev->button;
 471    if (!gui_grab && !qemu_input_is_absolute()) {
 472        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 473            /* start grabbing all events */
 474            sdl_grab_start(scon);
 475        }
 476    } else {
 477        if (ev->type == SDL_MOUSEBUTTONDOWN) {
 478            buttonstate |= SDL_BUTTON(bev->button);
 479        } else {
 480            buttonstate &= ~SDL_BUTTON(bev->button);
 481        }
 482        sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 483    }
 484}
 485
 486static void handle_mousewheel(SDL_Event *ev)
 487{
 488    struct sdl2_console *scon = get_scon_from_window(ev->wheel.windowID);
 489    SDL_MouseWheelEvent *wev = &ev->wheel;
 490    InputButton btn;
 491
 492    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 493        return;
 494    }
 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
 510static void handle_windowevent(SDL_Event *ev)
 511{
 512    struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 513    bool allow_close = true;
 514
 515    if (!scon) {
 516        return;
 517    }
 518
 519    switch (ev->window.event) {
 520    case SDL_WINDOWEVENT_RESIZED:
 521        {
 522            QemuUIInfo info;
 523            memset(&info, 0, sizeof(info));
 524            info.width = ev->window.data1;
 525            info.height = ev->window.data2;
 526            dpy_set_ui_info(scon->dcl.con, &info);
 527        }
 528        sdl2_redraw(scon);
 529        break;
 530    case SDL_WINDOWEVENT_EXPOSED:
 531        sdl2_redraw(scon);
 532        break;
 533    case SDL_WINDOWEVENT_FOCUS_GAINED:
 534    case SDL_WINDOWEVENT_ENTER:
 535        if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 536            absolute_mouse_grab(scon);
 537        }
 538        /* If a new console window opened using a hotkey receives the
 539         * focus, SDL sends another KEYDOWN event to the new window,
 540         * closing the console window immediately after.
 541         *
 542         * Work around this by ignoring further hotkey events until a
 543         * key is released.
 544         */
 545        scon->ignore_hotkeys = get_mod_state();
 546        break;
 547    case SDL_WINDOWEVENT_FOCUS_LOST:
 548        if (gui_grab && !gui_fullscreen) {
 549            sdl_grab_end(scon);
 550        }
 551        break;
 552    case SDL_WINDOWEVENT_RESTORED:
 553        update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 554        break;
 555    case SDL_WINDOWEVENT_MINIMIZED:
 556        update_displaychangelistener(&scon->dcl, 500);
 557        break;
 558    case SDL_WINDOWEVENT_CLOSE:
 559        if (qemu_console_is_graphic(scon->dcl.con)) {
 560            if (scon->opts->has_window_close && !scon->opts->window_close) {
 561                allow_close = false;
 562            }
 563            if (allow_close) {
 564                no_shutdown = 0;
 565                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 566            }
 567        } else {
 568            SDL_HideWindow(scon->real_window);
 569            scon->hidden = true;
 570        }
 571        break;
 572    case SDL_WINDOWEVENT_SHOWN:
 573        scon->hidden = false;
 574        break;
 575    case SDL_WINDOWEVENT_HIDDEN:
 576        scon->hidden = true;
 577        break;
 578    }
 579}
 580
 581void sdl2_poll_events(struct sdl2_console *scon)
 582{
 583    SDL_Event ev1, *ev = &ev1;
 584    bool allow_close = true;
 585    int idle = 1;
 586
 587    if (scon->last_vm_running != runstate_is_running()) {
 588        scon->last_vm_running = runstate_is_running();
 589        sdl_update_caption(scon);
 590    }
 591
 592    while (SDL_PollEvent(ev)) {
 593        switch (ev->type) {
 594        case SDL_KEYDOWN:
 595            idle = 0;
 596            handle_keydown(ev);
 597            break;
 598        case SDL_KEYUP:
 599            idle = 0;
 600            handle_keyup(ev);
 601            break;
 602        case SDL_TEXTINPUT:
 603            idle = 0;
 604            handle_textinput(ev);
 605            break;
 606        case SDL_QUIT:
 607            if (scon->opts->has_window_close && !scon->opts->window_close) {
 608                allow_close = false;
 609            }
 610            if (allow_close) {
 611                no_shutdown = 0;
 612                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 613            }
 614            break;
 615        case SDL_MOUSEMOTION:
 616            idle = 0;
 617            handle_mousemotion(ev);
 618            break;
 619        case SDL_MOUSEBUTTONDOWN:
 620        case SDL_MOUSEBUTTONUP:
 621            idle = 0;
 622            handle_mousebutton(ev);
 623            break;
 624        case SDL_MOUSEWHEEL:
 625            idle = 0;
 626            handle_mousewheel(ev);
 627            break;
 628        case SDL_WINDOWEVENT:
 629            handle_windowevent(ev);
 630            break;
 631        default:
 632            break;
 633        }
 634    }
 635
 636    if (idle) {
 637        if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 638            scon->idle_counter++;
 639            if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 640                scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 641            }
 642        }
 643    } else {
 644        scon->idle_counter = 0;
 645        scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 646    }
 647}
 648
 649static void sdl_mouse_warp(DisplayChangeListener *dcl,
 650                           int x, int y, int on)
 651{
 652    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 653
 654    if (!qemu_console_is_graphic(scon->dcl.con)) {
 655        return;
 656    }
 657
 658    if (on) {
 659        if (!guest_cursor) {
 660            sdl_show_cursor();
 661        }
 662        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 663            SDL_SetCursor(guest_sprite);
 664            if (!qemu_input_is_absolute() && !absolute_enabled) {
 665                SDL_WarpMouseInWindow(scon->real_window, x, y);
 666            }
 667        }
 668    } else if (gui_grab) {
 669        sdl_hide_cursor();
 670    }
 671    guest_cursor = on;
 672    guest_x = x, guest_y = y;
 673}
 674
 675static void sdl_mouse_define(DisplayChangeListener *dcl,
 676                             QEMUCursor *c)
 677{
 678
 679    if (guest_sprite) {
 680        SDL_FreeCursor(guest_sprite);
 681    }
 682
 683    if (guest_sprite_surface) {
 684        SDL_FreeSurface(guest_sprite_surface);
 685    }
 686
 687    guest_sprite_surface =
 688        SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 689                                 0xff0000, 0x00ff00, 0xff, 0xff000000);
 690
 691    if (!guest_sprite_surface) {
 692        fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 693        return;
 694    }
 695    guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 696                                         c->hot_x, c->hot_y);
 697    if (!guest_sprite) {
 698        fprintf(stderr, "Failed to make color cursor from %p\n", c);
 699        return;
 700    }
 701    if (guest_cursor &&
 702        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 703        SDL_SetCursor(guest_sprite);
 704    }
 705}
 706
 707static void sdl_cleanup(void)
 708{
 709    if (guest_sprite) {
 710        SDL_FreeCursor(guest_sprite);
 711    }
 712    SDL_QuitSubSystem(SDL_INIT_VIDEO);
 713}
 714
 715static const DisplayChangeListenerOps dcl_2d_ops = {
 716    .dpy_name             = "sdl2-2d",
 717    .dpy_gfx_update       = sdl2_2d_update,
 718    .dpy_gfx_switch       = sdl2_2d_switch,
 719    .dpy_gfx_check_format = sdl2_2d_check_format,
 720    .dpy_refresh          = sdl2_2d_refresh,
 721    .dpy_mouse_set        = sdl_mouse_warp,
 722    .dpy_cursor_define    = sdl_mouse_define,
 723};
 724
 725#ifdef CONFIG_OPENGL
 726static const DisplayChangeListenerOps dcl_gl_ops = {
 727    .dpy_name                = "sdl2-gl",
 728    .dpy_gfx_update          = sdl2_gl_update,
 729    .dpy_gfx_switch          = sdl2_gl_switch,
 730    .dpy_gfx_check_format    = console_gl_check_format,
 731    .dpy_refresh             = sdl2_gl_refresh,
 732    .dpy_mouse_set           = sdl_mouse_warp,
 733    .dpy_cursor_define       = sdl_mouse_define,
 734
 735    .dpy_gl_ctx_create       = sdl2_gl_create_context,
 736    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 737    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 738    .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 739    .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 740    .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 741    .dpy_gl_update           = sdl2_gl_scanout_flush,
 742};
 743#endif
 744
 745static void sdl2_display_early_init(DisplayOptions *o)
 746{
 747    assert(o->type == DISPLAY_TYPE_SDL);
 748    if (o->has_gl && o->gl) {
 749#ifdef CONFIG_OPENGL
 750        display_opengl = 1;
 751#endif
 752    }
 753}
 754
 755static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 756{
 757    uint8_t data = 0;
 758    int i;
 759    SDL_SysWMinfo info;
 760    SDL_Surface *icon = NULL;
 761
 762    assert(o->type == DISPLAY_TYPE_SDL);
 763
 764#ifdef __linux__
 765    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 766     * accessible $DISPLAY to open X11 window.  This is often the case
 767     * when qemu is run using sudo.  But in this case, and when actually
 768     * run in X11 environment, SDL fights with X11 for the video card,
 769     * making current display unavailable, often until reboot.
 770     * So make x11 the default SDL video driver if this variable is unset.
 771     * This is a bit hackish but saves us from bigger problem.
 772     * Maybe it's a good idea to fix this in SDL instead.
 773     */
 774    setenv("SDL_VIDEODRIVER", "x11", 0);
 775#endif
 776
 777    if (SDL_Init(SDL_INIT_VIDEO)) {
 778        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 779                SDL_GetError());
 780        exit(1);
 781    }
 782#ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR /* only available since SDL 2.0.8 */
 783    SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
 784#endif
 785    SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 786    memset(&info, 0, sizeof(info));
 787    SDL_VERSION(&info.version);
 788
 789    gui_fullscreen = o->has_full_screen && o->full_screen;
 790
 791    for (i = 0;; i++) {
 792        QemuConsole *con = qemu_console_lookup_by_index(i);
 793        if (!con) {
 794            break;
 795        }
 796    }
 797    sdl2_num_outputs = i;
 798    if (sdl2_num_outputs == 0) {
 799        return;
 800    }
 801    sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 802    for (i = 0; i < sdl2_num_outputs; i++) {
 803        QemuConsole *con = qemu_console_lookup_by_index(i);
 804        assert(con != NULL);
 805        if (!qemu_console_is_graphic(con) &&
 806            qemu_console_get_index(con) != 0) {
 807            sdl2_console[i].hidden = true;
 808        }
 809        sdl2_console[i].idx = i;
 810        sdl2_console[i].opts = o;
 811#ifdef CONFIG_OPENGL
 812        sdl2_console[i].opengl = display_opengl;
 813        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 814#else
 815        sdl2_console[i].opengl = 0;
 816        sdl2_console[i].dcl.ops = &dcl_2d_ops;
 817#endif
 818        sdl2_console[i].dcl.con = con;
 819        sdl2_console[i].kbd = qkbd_state_init(con);
 820        register_displaychangelistener(&sdl2_console[i].dcl);
 821
 822#if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 823        if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 824#if defined(SDL_VIDEO_DRIVER_WINDOWS)
 825            qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 826#elif defined(SDL_VIDEO_DRIVER_X11)
 827            qemu_console_set_window_id(con, info.info.x11.window);
 828#endif
 829        }
 830#endif
 831    }
 832
 833#ifdef CONFIG_SDL_IMAGE
 834    icon = IMG_Load(CONFIG_QEMU_ICONDIR "/hicolor/128x128/apps/qemu.png");
 835#else
 836    /* Load a 32x32x4 image. White pixels are transparent. */
 837    icon = SDL_LoadBMP(CONFIG_QEMU_ICONDIR "/hicolor/32x32/apps/qemu.bmp");
 838    if (icon) {
 839        uint32_t colorkey = SDL_MapRGB(icon->format, 255, 255, 255);
 840        SDL_SetColorKey(icon, SDL_TRUE, colorkey);
 841    }
 842#endif
 843    if (icon) {
 844        SDL_SetWindowIcon(sdl2_console[0].real_window, icon);
 845    }
 846
 847    gui_grab = 0;
 848    if (gui_fullscreen) {
 849        sdl_grab_start(0);
 850    }
 851
 852    mouse_mode_notifier.notify = sdl_mouse_mode_change;
 853    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 854
 855    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 856    sdl_cursor_normal = SDL_GetCursor();
 857
 858    atexit(sdl_cleanup);
 859}
 860
 861static QemuDisplay qemu_display_sdl2 = {
 862    .type       = DISPLAY_TYPE_SDL,
 863    .early_init = sdl2_display_early_init,
 864    .init       = sdl2_display_init,
 865};
 866
 867static void register_sdl1(void)
 868{
 869    qemu_display_register(&qemu_display_sdl2);
 870}
 871
 872type_init(register_sdl1);
 873