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/runstate.h"
  32#include "sysemu/sysemu.h"
  33
  34static int sdl2_num_outputs;
  35static struct sdl2_console *sdl2_console;
  36
  37static SDL_Surface *guest_sprite_surface;
  38static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  39
  40static int gui_saved_grab;
  41static int gui_fullscreen;
  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    int gui_keysym = 0;
 334
 335    if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
 336        switch (ev->key.keysym.scancode) {
 337        case SDL_SCANCODE_2:
 338        case SDL_SCANCODE_3:
 339        case SDL_SCANCODE_4:
 340        case SDL_SCANCODE_5:
 341        case SDL_SCANCODE_6:
 342        case SDL_SCANCODE_7:
 343        case SDL_SCANCODE_8:
 344        case SDL_SCANCODE_9:
 345            if (gui_grab) {
 346                sdl_grab_end(scon);
 347            }
 348
 349            win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 350            if (win < sdl2_num_outputs) {
 351                sdl2_console[win].hidden = !sdl2_console[win].hidden;
 352                if (sdl2_console[win].real_window) {
 353                    if (sdl2_console[win].hidden) {
 354                        SDL_HideWindow(sdl2_console[win].real_window);
 355                    } else {
 356                        SDL_ShowWindow(sdl2_console[win].real_window);
 357                    }
 358                }
 359                gui_keysym = 1;
 360            }
 361            break;
 362        case SDL_SCANCODE_F:
 363            toggle_full_screen(scon);
 364            gui_keysym = 1;
 365            break;
 366        case SDL_SCANCODE_G:
 367            gui_keysym = 1;
 368            if (!gui_grab) {
 369                sdl_grab_start(scon);
 370            } else if (!gui_fullscreen) {
 371                sdl_grab_end(scon);
 372            }
 373            break;
 374        case SDL_SCANCODE_U:
 375            sdl2_window_resize(scon);
 376            if (!scon->opengl) {
 377                /* re-create scon->texture */
 378                sdl2_2d_switch(&scon->dcl, scon->surface);
 379            }
 380            gui_keysym = 1;
 381            break;
 382#if 0
 383        case SDL_SCANCODE_KP_PLUS:
 384        case SDL_SCANCODE_KP_MINUS:
 385            if (!gui_fullscreen) {
 386                int scr_w, scr_h;
 387                int width, height;
 388                SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 389
 390                width = MAX(scr_w + (ev->key.keysym.scancode ==
 391                                     SDL_SCANCODE_KP_PLUS ? 50 : -50),
 392                            160);
 393                height = (surface_height(scon->surface) * width) /
 394                    surface_width(scon->surface);
 395                fprintf(stderr, "%s: scale to %dx%d\n",
 396                        __func__, width, height);
 397                sdl_scale(scon, width, height);
 398                sdl2_redraw(scon);
 399                gui_keysym = 1;
 400            }
 401#endif
 402        default:
 403            break;
 404        }
 405    }
 406    if (!gui_keysym) {
 407        sdl2_process_key(scon, &ev->key);
 408    }
 409}
 410
 411static void handle_keyup(SDL_Event *ev)
 412{
 413    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 414
 415    scon->ignore_hotkeys = false;
 416    sdl2_process_key(scon, &ev->key);
 417}
 418
 419static void handle_textinput(SDL_Event *ev)
 420{
 421    struct sdl2_console *scon = get_scon_from_window(ev->text.windowID);
 422    QemuConsole *con = scon ? scon->dcl.con : NULL;
 423
 424    if (qemu_console_is_graphic(con)) {
 425        return;
 426    }
 427    kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 428}
 429
 430static void handle_mousemotion(SDL_Event *ev)
 431{
 432    int max_x, max_y;
 433    struct sdl2_console *scon = get_scon_from_window(ev->motion.windowID);
 434
 435    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 436        return;
 437    }
 438
 439    if (qemu_input_is_absolute() || absolute_enabled) {
 440        int scr_w, scr_h;
 441        SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 442        max_x = scr_w - 1;
 443        max_y = scr_h - 1;
 444        if (gui_grab && !gui_fullscreen
 445            && (ev->motion.x == 0 || ev->motion.y == 0 ||
 446                ev->motion.x == max_x || ev->motion.y == max_y)) {
 447            sdl_grab_end(scon);
 448        }
 449        if (!gui_grab &&
 450            (ev->motion.x > 0 && ev->motion.x < max_x &&
 451             ev->motion.y > 0 && ev->motion.y < max_y)) {
 452            sdl_grab_start(scon);
 453        }
 454    }
 455    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 456        sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 457                             ev->motion.x, ev->motion.y, ev->motion.state);
 458    }
 459}
 460
 461static void handle_mousebutton(SDL_Event *ev)
 462{
 463    int buttonstate = SDL_GetMouseState(NULL, NULL);
 464    SDL_MouseButtonEvent *bev;
 465    struct sdl2_console *scon = get_scon_from_window(ev->button.windowID);
 466
 467    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 468        return;
 469    }
 470
 471    bev = &ev->button;
 472    if (!gui_grab && !qemu_input_is_absolute()) {
 473        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 474            /* start grabbing all events */
 475            sdl_grab_start(scon);
 476        }
 477    } else {
 478        if (ev->type == SDL_MOUSEBUTTONDOWN) {
 479            buttonstate |= SDL_BUTTON(bev->button);
 480        } else {
 481            buttonstate &= ~SDL_BUTTON(bev->button);
 482        }
 483        sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 484    }
 485}
 486
 487static void handle_mousewheel(SDL_Event *ev)
 488{
 489    struct sdl2_console *scon = get_scon_from_window(ev->wheel.windowID);
 490    SDL_MouseWheelEvent *wev = &ev->wheel;
 491    InputButton btn;
 492
 493    if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 494        return;
 495    }
 496
 497    if (wev->y > 0) {
 498        btn = INPUT_BUTTON_WHEEL_UP;
 499    } else if (wev->y < 0) {
 500        btn = INPUT_BUTTON_WHEEL_DOWN;
 501    } else {
 502        return;
 503    }
 504
 505    qemu_input_queue_btn(scon->dcl.con, btn, true);
 506    qemu_input_event_sync();
 507    qemu_input_queue_btn(scon->dcl.con, btn, false);
 508    qemu_input_event_sync();
 509}
 510
 511static void handle_windowevent(SDL_Event *ev)
 512{
 513    struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 514    bool allow_close = true;
 515
 516    if (!scon) {
 517        return;
 518    }
 519
 520    switch (ev->window.event) {
 521    case SDL_WINDOWEVENT_RESIZED:
 522        {
 523            QemuUIInfo info;
 524            memset(&info, 0, sizeof(info));
 525            info.width = ev->window.data1;
 526            info.height = ev->window.data2;
 527            dpy_set_ui_info(scon->dcl.con, &info);
 528        }
 529        sdl2_redraw(scon);
 530        break;
 531    case SDL_WINDOWEVENT_EXPOSED:
 532        sdl2_redraw(scon);
 533        break;
 534    case SDL_WINDOWEVENT_FOCUS_GAINED:
 535    case SDL_WINDOWEVENT_ENTER:
 536        if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 537            absolute_mouse_grab(scon);
 538        }
 539        /* If a new console window opened using a hotkey receives the
 540         * focus, SDL sends another KEYDOWN event to the new window,
 541         * closing the console window immediately after.
 542         *
 543         * Work around this by ignoring further hotkey events until a
 544         * key is released.
 545         */
 546        scon->ignore_hotkeys = get_mod_state();
 547        break;
 548    case SDL_WINDOWEVENT_FOCUS_LOST:
 549        if (gui_grab && !gui_fullscreen) {
 550            sdl_grab_end(scon);
 551        }
 552        break;
 553    case SDL_WINDOWEVENT_RESTORED:
 554        update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 555        break;
 556    case SDL_WINDOWEVENT_MINIMIZED:
 557        update_displaychangelistener(&scon->dcl, 500);
 558        break;
 559    case SDL_WINDOWEVENT_CLOSE:
 560        if (qemu_console_is_graphic(scon->dcl.con)) {
 561            if (scon->opts->has_window_close && !scon->opts->window_close) {
 562                allow_close = false;
 563            }
 564            if (allow_close) {
 565                no_shutdown = 0;
 566                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 567            }
 568        } else {
 569            SDL_HideWindow(scon->real_window);
 570            scon->hidden = true;
 571        }
 572        break;
 573    case SDL_WINDOWEVENT_SHOWN:
 574        scon->hidden = false;
 575        break;
 576    case SDL_WINDOWEVENT_HIDDEN:
 577        scon->hidden = true;
 578        break;
 579    }
 580}
 581
 582void sdl2_poll_events(struct sdl2_console *scon)
 583{
 584    SDL_Event ev1, *ev = &ev1;
 585    bool allow_close = true;
 586    int idle = 1;
 587
 588    if (scon->last_vm_running != runstate_is_running()) {
 589        scon->last_vm_running = runstate_is_running();
 590        sdl_update_caption(scon);
 591    }
 592
 593    while (SDL_PollEvent(ev)) {
 594        switch (ev->type) {
 595        case SDL_KEYDOWN:
 596            idle = 0;
 597            handle_keydown(ev);
 598            break;
 599        case SDL_KEYUP:
 600            idle = 0;
 601            handle_keyup(ev);
 602            break;
 603        case SDL_TEXTINPUT:
 604            idle = 0;
 605            handle_textinput(ev);
 606            break;
 607        case SDL_QUIT:
 608            if (scon->opts->has_window_close && !scon->opts->window_close) {
 609                allow_close = false;
 610            }
 611            if (allow_close) {
 612                no_shutdown = 0;
 613                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 614            }
 615            break;
 616        case SDL_MOUSEMOTION:
 617            idle = 0;
 618            handle_mousemotion(ev);
 619            break;
 620        case SDL_MOUSEBUTTONDOWN:
 621        case SDL_MOUSEBUTTONUP:
 622            idle = 0;
 623            handle_mousebutton(ev);
 624            break;
 625        case SDL_MOUSEWHEEL:
 626            idle = 0;
 627            handle_mousewheel(ev);
 628            break;
 629        case SDL_WINDOWEVENT:
 630            handle_windowevent(ev);
 631            break;
 632        default:
 633            break;
 634        }
 635    }
 636
 637    if (idle) {
 638        if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 639            scon->idle_counter++;
 640            if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 641                scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 642            }
 643        }
 644    } else {
 645        scon->idle_counter = 0;
 646        scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 647    }
 648}
 649
 650static void sdl_mouse_warp(DisplayChangeListener *dcl,
 651                           int x, int y, int on)
 652{
 653    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 654
 655    if (!qemu_console_is_graphic(scon->dcl.con)) {
 656        return;
 657    }
 658
 659    if (on) {
 660        if (!guest_cursor) {
 661            sdl_show_cursor();
 662        }
 663        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 664            SDL_SetCursor(guest_sprite);
 665            if (!qemu_input_is_absolute() && !absolute_enabled) {
 666                SDL_WarpMouseInWindow(scon->real_window, x, y);
 667            }
 668        }
 669    } else if (gui_grab) {
 670        sdl_hide_cursor();
 671    }
 672    guest_cursor = on;
 673    guest_x = x, guest_y = y;
 674}
 675
 676static void sdl_mouse_define(DisplayChangeListener *dcl,
 677                             QEMUCursor *c)
 678{
 679
 680    if (guest_sprite) {
 681        SDL_FreeCursor(guest_sprite);
 682    }
 683
 684    if (guest_sprite_surface) {
 685        SDL_FreeSurface(guest_sprite_surface);
 686    }
 687
 688    guest_sprite_surface =
 689        SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 690                                 0xff0000, 0x00ff00, 0xff, 0xff000000);
 691
 692    if (!guest_sprite_surface) {
 693        fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 694        return;
 695    }
 696    guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 697                                         c->hot_x, c->hot_y);
 698    if (!guest_sprite) {
 699        fprintf(stderr, "Failed to make color cursor from %p\n", c);
 700        return;
 701    }
 702    if (guest_cursor &&
 703        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 704        SDL_SetCursor(guest_sprite);
 705    }
 706}
 707
 708static void sdl_cleanup(void)
 709{
 710    if (guest_sprite) {
 711        SDL_FreeCursor(guest_sprite);
 712    }
 713    SDL_QuitSubSystem(SDL_INIT_VIDEO);
 714}
 715
 716static const DisplayChangeListenerOps dcl_2d_ops = {
 717    .dpy_name             = "sdl2-2d",
 718    .dpy_gfx_update       = sdl2_2d_update,
 719    .dpy_gfx_switch       = sdl2_2d_switch,
 720    .dpy_gfx_check_format = sdl2_2d_check_format,
 721    .dpy_refresh          = sdl2_2d_refresh,
 722    .dpy_mouse_set        = sdl_mouse_warp,
 723    .dpy_cursor_define    = sdl_mouse_define,
 724};
 725
 726#ifdef CONFIG_OPENGL
 727static const DisplayChangeListenerOps dcl_gl_ops = {
 728    .dpy_name                = "sdl2-gl",
 729    .dpy_gfx_update          = sdl2_gl_update,
 730    .dpy_gfx_switch          = sdl2_gl_switch,
 731    .dpy_gfx_check_format    = console_gl_check_format,
 732    .dpy_refresh             = sdl2_gl_refresh,
 733    .dpy_mouse_set           = sdl_mouse_warp,
 734    .dpy_cursor_define       = sdl_mouse_define,
 735
 736    .dpy_gl_ctx_create       = sdl2_gl_create_context,
 737    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 738    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 739    .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 740    .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 741    .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 742    .dpy_gl_update           = sdl2_gl_scanout_flush,
 743};
 744#endif
 745
 746static void sdl2_display_early_init(DisplayOptions *o)
 747{
 748    assert(o->type == DISPLAY_TYPE_SDL);
 749    if (o->has_gl && o->gl) {
 750#ifdef CONFIG_OPENGL
 751        display_opengl = 1;
 752#endif
 753    }
 754}
 755
 756static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 757{
 758    uint8_t data = 0;
 759    int i;
 760    SDL_SysWMinfo info;
 761    SDL_Surface *icon = NULL;
 762
 763    assert(o->type == DISPLAY_TYPE_SDL);
 764
 765#ifdef __linux__
 766    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 767     * accessible $DISPLAY to open X11 window.  This is often the case
 768     * when qemu is run using sudo.  But in this case, and when actually
 769     * run in X11 environment, SDL fights with X11 for the video card,
 770     * making current display unavailable, often until reboot.
 771     * So make x11 the default SDL video driver if this variable is unset.
 772     * This is a bit hackish but saves us from bigger problem.
 773     * Maybe it's a good idea to fix this in SDL instead.
 774     */
 775    setenv("SDL_VIDEODRIVER", "x11", 0);
 776#endif
 777
 778    if (SDL_Init(SDL_INIT_VIDEO)) {
 779        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 780                SDL_GetError());
 781        exit(1);
 782    }
 783#ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR /* only available since SDL 2.0.8 */
 784    SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
 785#endif
 786    SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 787    memset(&info, 0, sizeof(info));
 788    SDL_VERSION(&info.version);
 789
 790    gui_fullscreen = o->has_full_screen && o->full_screen;
 791
 792    for (i = 0;; i++) {
 793        QemuConsole *con = qemu_console_lookup_by_index(i);
 794        if (!con) {
 795            break;
 796        }
 797    }
 798    sdl2_num_outputs = i;
 799    if (sdl2_num_outputs == 0) {
 800        return;
 801    }
 802    sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 803    for (i = 0; i < sdl2_num_outputs; i++) {
 804        QemuConsole *con = qemu_console_lookup_by_index(i);
 805        assert(con != NULL);
 806        if (!qemu_console_is_graphic(con) &&
 807            qemu_console_get_index(con) != 0) {
 808            sdl2_console[i].hidden = true;
 809        }
 810        sdl2_console[i].idx = i;
 811        sdl2_console[i].opts = o;
 812#ifdef CONFIG_OPENGL
 813        sdl2_console[i].opengl = display_opengl;
 814        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 815#else
 816        sdl2_console[i].opengl = 0;
 817        sdl2_console[i].dcl.ops = &dcl_2d_ops;
 818#endif
 819        sdl2_console[i].dcl.con = con;
 820        sdl2_console[i].kbd = qkbd_state_init(con);
 821        register_displaychangelistener(&sdl2_console[i].dcl);
 822
 823#if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 824        if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 825#if defined(SDL_VIDEO_DRIVER_WINDOWS)
 826            qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 827#elif defined(SDL_VIDEO_DRIVER_X11)
 828            qemu_console_set_window_id(con, info.info.x11.window);
 829#endif
 830        }
 831#endif
 832    }
 833
 834#ifdef CONFIG_SDL_IMAGE
 835    icon = IMG_Load(CONFIG_QEMU_ICONDIR "/hicolor/128x128/apps/qemu.png");
 836#else
 837    /* Load a 32x32x4 image. White pixels are transparent. */
 838    icon = SDL_LoadBMP(CONFIG_QEMU_ICONDIR "/hicolor/32x32/apps/qemu.bmp");
 839    if (icon) {
 840        uint32_t colorkey = SDL_MapRGB(icon->format, 255, 255, 255);
 841        SDL_SetColorKey(icon, SDL_TRUE, colorkey);
 842    }
 843#endif
 844    if (icon) {
 845        SDL_SetWindowIcon(sdl2_console[0].real_window, icon);
 846    }
 847
 848    gui_grab = 0;
 849    if (gui_fullscreen) {
 850        sdl_grab_start(0);
 851    }
 852
 853    mouse_mode_notifier.notify = sdl_mouse_mode_change;
 854    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 855
 856    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 857    sdl_cursor_normal = SDL_GetCursor();
 858
 859    atexit(sdl_cleanup);
 860}
 861
 862static QemuDisplay qemu_display_sdl2 = {
 863    .type       = DISPLAY_TYPE_SDL,
 864    .early_init = sdl2_display_early_init,
 865    .init       = sdl2_display_init,
 866};
 867
 868static void register_sdl1(void)
 869{
 870    qemu_display_register(&qemu_display_sdl2);
 871}
 872
 873type_init(register_sdl1);
 874