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;
  35static DisplayOptions *opts;
  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_keysym;
  43static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  44static SDL_Cursor *sdl_cursor_normal;
  45static SDL_Cursor *sdl_cursor_hidden;
  46static int absolute_enabled;
  47static int guest_cursor;
  48static int guest_x, guest_y;
  49static SDL_Cursor *guest_sprite;
  50static Notifier mouse_mode_notifier;
  51
  52#define SDL2_REFRESH_INTERVAL_BUSY 10
  53#define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  54                             / SDL2_REFRESH_INTERVAL_BUSY + 1)
  55
  56static void sdl_update_caption(struct sdl2_console *scon);
  57
  58static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  59{
  60    int i;
  61    for (i = 0; i < sdl2_num_outputs; i++) {
  62        if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  63            return &sdl2_console[i];
  64        }
  65    }
  66    return NULL;
  67}
  68
  69void sdl2_window_create(struct sdl2_console *scon)
  70{
  71    int flags = 0;
  72
  73    if (!scon->surface) {
  74        return;
  75    }
  76    assert(!scon->real_window);
  77
  78    if (gui_fullscreen) {
  79        flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  80    } else {
  81        flags |= SDL_WINDOW_RESIZABLE;
  82    }
  83    if (scon->hidden) {
  84        flags |= SDL_WINDOW_HIDDEN;
  85    }
  86
  87    scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  88                                         SDL_WINDOWPOS_UNDEFINED,
  89                                         surface_width(scon->surface),
  90                                         surface_height(scon->surface),
  91                                         flags);
  92    scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  93    if (scon->opengl) {
  94        scon->winctx = SDL_GL_GetCurrentContext();
  95    }
  96    sdl_update_caption(scon);
  97}
  98
  99void sdl2_window_destroy(struct sdl2_console *scon)
 100{
 101    if (!scon->real_window) {
 102        return;
 103    }
 104
 105    SDL_DestroyRenderer(scon->real_renderer);
 106    scon->real_renderer = NULL;
 107    SDL_DestroyWindow(scon->real_window);
 108    scon->real_window = NULL;
 109}
 110
 111void sdl2_window_resize(struct sdl2_console *scon)
 112{
 113    if (!scon->real_window) {
 114        return;
 115    }
 116
 117    SDL_SetWindowSize(scon->real_window,
 118                      surface_width(scon->surface),
 119                      surface_height(scon->surface));
 120}
 121
 122static void sdl2_redraw(struct sdl2_console *scon)
 123{
 124    if (scon->opengl) {
 125#ifdef CONFIG_OPENGL
 126        sdl2_gl_redraw(scon);
 127#endif
 128    } else {
 129        sdl2_2d_redraw(scon);
 130    }
 131}
 132
 133static void sdl_update_caption(struct sdl2_console *scon)
 134{
 135    char win_title[1024];
 136    char icon_title[1024];
 137    const char *status = "";
 138
 139    if (!runstate_is_running()) {
 140        status = " [Stopped]";
 141    } else if (gui_grab) {
 142        if (alt_grab) {
 143            status = " - Press Ctrl-Alt-Shift-G to exit grab";
 144        } else if (ctrl_grab) {
 145            status = " - Press Right-Ctrl-G to exit grab";
 146        } else {
 147            status = " - Press Ctrl-Alt-G to exit grab";
 148        }
 149    }
 150
 151    if (qemu_name) {
 152        snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 153                 scon->idx, status);
 154        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 155    } else {
 156        snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 157        snprintf(icon_title, sizeof(icon_title), "QEMU");
 158    }
 159
 160    if (scon->real_window) {
 161        SDL_SetWindowTitle(scon->real_window, win_title);
 162    }
 163}
 164
 165static void sdl_hide_cursor(void)
 166{
 167    if (!cursor_hide) {
 168        return;
 169    }
 170
 171    SDL_ShowCursor(SDL_DISABLE);
 172    SDL_SetCursor(sdl_cursor_hidden);
 173
 174    if (!qemu_input_is_absolute()) {
 175        SDL_SetRelativeMouseMode(SDL_TRUE);
 176    }
 177}
 178
 179static void sdl_show_cursor(void)
 180{
 181    if (!cursor_hide) {
 182        return;
 183    }
 184
 185    if (!qemu_input_is_absolute()) {
 186        SDL_SetRelativeMouseMode(SDL_FALSE);
 187    }
 188
 189    if (guest_cursor &&
 190        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 191        SDL_SetCursor(guest_sprite);
 192    } else {
 193        SDL_SetCursor(sdl_cursor_normal);
 194    }
 195
 196    SDL_ShowCursor(SDL_ENABLE);
 197}
 198
 199static void sdl_grab_start(struct sdl2_console *scon)
 200{
 201    QemuConsole *con = scon ? scon->dcl.con : NULL;
 202
 203    if (!con || !qemu_console_is_graphic(con)) {
 204        return;
 205    }
 206    /*
 207     * If the application is not active, do not try to enter grab state. This
 208     * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 209     * application (SDL bug).
 210     */
 211    if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 212        return;
 213    }
 214    if (guest_cursor) {
 215        SDL_SetCursor(guest_sprite);
 216        if (!qemu_input_is_absolute() && !absolute_enabled) {
 217            SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 218        }
 219    } else {
 220        sdl_hide_cursor();
 221    }
 222    SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 223    gui_grab = 1;
 224    sdl_update_caption(scon);
 225}
 226
 227static void sdl_grab_end(struct sdl2_console *scon)
 228{
 229    SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 230    gui_grab = 0;
 231    sdl_show_cursor();
 232    sdl_update_caption(scon);
 233}
 234
 235static void absolute_mouse_grab(struct sdl2_console *scon)
 236{
 237    int mouse_x, mouse_y;
 238    int scr_w, scr_h;
 239    SDL_GetMouseState(&mouse_x, &mouse_y);
 240    SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 241    if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 242        mouse_y > 0 && mouse_y < scr_h - 1) {
 243        sdl_grab_start(scon);
 244    }
 245}
 246
 247static void sdl_mouse_mode_change(Notifier *notify, void *data)
 248{
 249    if (qemu_input_is_absolute()) {
 250        if (!absolute_enabled) {
 251            absolute_enabled = 1;
 252            SDL_SetRelativeMouseMode(SDL_FALSE);
 253            absolute_mouse_grab(&sdl2_console[0]);
 254        }
 255    } else if (absolute_enabled) {
 256        if (!gui_fullscreen) {
 257            sdl_grab_end(&sdl2_console[0]);
 258        }
 259        absolute_enabled = 0;
 260    }
 261}
 262
 263static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 264                                 int x, int y, int state)
 265{
 266    static uint32_t bmap[INPUT_BUTTON__MAX] = {
 267        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 268        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 269        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 270    };
 271    static uint32_t prev_state;
 272
 273    if (prev_state != state) {
 274        qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 275        prev_state = state;
 276    }
 277
 278    if (qemu_input_is_absolute()) {
 279        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
 280                             x, 0, surface_width(scon->surface));
 281        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
 282                             y, 0, surface_height(scon->surface));
 283    } else {
 284        if (guest_cursor) {
 285            x -= guest_x;
 286            y -= guest_y;
 287            guest_x += x;
 288            guest_y += y;
 289            dx = x;
 290            dy = y;
 291        }
 292        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 293        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 294    }
 295    qemu_input_event_sync();
 296}
 297
 298static void toggle_full_screen(struct sdl2_console *scon)
 299{
 300    gui_fullscreen = !gui_fullscreen;
 301    if (gui_fullscreen) {
 302        SDL_SetWindowFullscreen(scon->real_window,
 303                                SDL_WINDOW_FULLSCREEN_DESKTOP);
 304        gui_saved_grab = gui_grab;
 305        sdl_grab_start(scon);
 306    } else {
 307        if (!gui_saved_grab) {
 308            sdl_grab_end(scon);
 309        }
 310        SDL_SetWindowFullscreen(scon->real_window, 0);
 311    }
 312    sdl2_redraw(scon);
 313}
 314
 315static int get_mod_state(void)
 316{
 317    SDL_Keymod mod = SDL_GetModState();
 318
 319    if (alt_grab) {
 320        return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
 321            (gui_grab_code | KMOD_LSHIFT);
 322    } else if (ctrl_grab) {
 323        return (mod & KMOD_RCTRL) == KMOD_RCTRL;
 324    } else {
 325        return (mod & gui_grab_code) == gui_grab_code;
 326    }
 327}
 328
 329static void handle_keydown(SDL_Event *ev)
 330{
 331    int win;
 332    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 333    int gui_key_modifier_pressed = get_mod_state();
 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_destroy(scon);
 376            sdl2_window_create(scon);
 377            if (!scon->opengl) {
 378                /* re-create scon->texture */
 379                sdl2_2d_switch(&scon->dcl, scon->surface);
 380            }
 381            gui_keysym = 1;
 382            break;
 383#if 0
 384        case SDL_SCANCODE_KP_PLUS:
 385        case SDL_SCANCODE_KP_MINUS:
 386            if (!gui_fullscreen) {
 387                int scr_w, scr_h;
 388                int width, height;
 389                SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 390
 391                width = MAX(scr_w + (ev->key.keysym.scancode ==
 392                                     SDL_SCANCODE_KP_PLUS ? 50 : -50),
 393                            160);
 394                height = (surface_height(scon->surface) * width) /
 395                    surface_width(scon->surface);
 396                fprintf(stderr, "%s: scale to %dx%d\n",
 397                        __func__, width, height);
 398                sdl_scale(scon, width, height);
 399                sdl2_redraw(scon);
 400                gui_keysym = 1;
 401            }
 402#endif
 403        default:
 404            break;
 405        }
 406    }
 407    if (!gui_keysym) {
 408        sdl2_process_key(scon, &ev->key);
 409    }
 410}
 411
 412static void handle_keyup(SDL_Event *ev)
 413{
 414    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 415    int gui_key_modifier_pressed = get_mod_state();
 416
 417    scon->ignore_hotkeys = false;
 418
 419    if (!gui_key_modifier_pressed) {
 420        gui_keysym = 0;
 421    }
 422    if (!gui_keysym) {
 423        sdl2_process_key(scon, &ev->key);
 424    }
 425}
 426
 427static void handle_textinput(SDL_Event *ev)
 428{
 429    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 430    QemuConsole *con = scon ? scon->dcl.con : NULL;
 431
 432    if (qemu_console_is_graphic(con)) {
 433        return;
 434    }
 435    kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 436}
 437
 438static void handle_mousemotion(SDL_Event *ev)
 439{
 440    int max_x, max_y;
 441    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 442
 443    if (!qemu_console_is_graphic(scon->dcl.con)) {
 444        return;
 445    }
 446
 447    if (qemu_input_is_absolute() || absolute_enabled) {
 448        int scr_w, scr_h;
 449        SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 450        max_x = scr_w - 1;
 451        max_y = scr_h - 1;
 452        if (gui_grab && !gui_fullscreen
 453            && (ev->motion.x == 0 || ev->motion.y == 0 ||
 454                ev->motion.x == max_x || ev->motion.y == max_y)) {
 455            sdl_grab_end(scon);
 456        }
 457        if (!gui_grab &&
 458            (ev->motion.x > 0 && ev->motion.x < max_x &&
 459             ev->motion.y > 0 && ev->motion.y < max_y)) {
 460            sdl_grab_start(scon);
 461        }
 462    }
 463    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 464        sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 465                             ev->motion.x, ev->motion.y, ev->motion.state);
 466    }
 467}
 468
 469static void handle_mousebutton(SDL_Event *ev)
 470{
 471    int buttonstate = SDL_GetMouseState(NULL, NULL);
 472    SDL_MouseButtonEvent *bev;
 473    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 474
 475    if (!qemu_console_is_graphic(scon->dcl.con)) {
 476        return;
 477    }
 478
 479    bev = &ev->button;
 480    if (!gui_grab && !qemu_input_is_absolute()) {
 481        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 482            /* start grabbing all events */
 483            sdl_grab_start(scon);
 484        }
 485    } else {
 486        if (ev->type == SDL_MOUSEBUTTONDOWN) {
 487            buttonstate |= SDL_BUTTON(bev->button);
 488        } else {
 489            buttonstate &= ~SDL_BUTTON(bev->button);
 490        }
 491        sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 492    }
 493}
 494
 495static void handle_mousewheel(SDL_Event *ev)
 496{
 497    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 498    SDL_MouseWheelEvent *wev = &ev->wheel;
 499    InputButton btn;
 500
 501    if (!qemu_console_is_graphic(scon->dcl.con)) {
 502        return;
 503    }
 504
 505    if (wev->y > 0) {
 506        btn = INPUT_BUTTON_WHEEL_UP;
 507    } else if (wev->y < 0) {
 508        btn = INPUT_BUTTON_WHEEL_DOWN;
 509    } else {
 510        return;
 511    }
 512
 513    qemu_input_queue_btn(scon->dcl.con, btn, true);
 514    qemu_input_event_sync();
 515    qemu_input_queue_btn(scon->dcl.con, btn, false);
 516    qemu_input_event_sync();
 517}
 518
 519static void handle_windowevent(SDL_Event *ev)
 520{
 521    struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 522    bool allow_close = true;
 523
 524    if (!scon) {
 525        return;
 526    }
 527
 528    switch (ev->window.event) {
 529    case SDL_WINDOWEVENT_RESIZED:
 530        {
 531            QemuUIInfo info;
 532            memset(&info, 0, sizeof(info));
 533            info.width = ev->window.data1;
 534            info.height = ev->window.data2;
 535            dpy_set_ui_info(scon->dcl.con, &info);
 536        }
 537        sdl2_redraw(scon);
 538        break;
 539    case SDL_WINDOWEVENT_EXPOSED:
 540        sdl2_redraw(scon);
 541        break;
 542    case SDL_WINDOWEVENT_FOCUS_GAINED:
 543    case SDL_WINDOWEVENT_ENTER:
 544        if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 545            absolute_mouse_grab(scon);
 546        }
 547        /* If a new console window opened using a hotkey receives the
 548         * focus, SDL sends another KEYDOWN event to the new window,
 549         * closing the console window immediately after.
 550         *
 551         * Work around this by ignoring further hotkey events until a
 552         * key is released.
 553         */
 554        scon->ignore_hotkeys = get_mod_state();
 555        break;
 556    case SDL_WINDOWEVENT_FOCUS_LOST:
 557        if (gui_grab && !gui_fullscreen) {
 558            sdl_grab_end(scon);
 559        }
 560        break;
 561    case SDL_WINDOWEVENT_RESTORED:
 562        update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 563        break;
 564    case SDL_WINDOWEVENT_MINIMIZED:
 565        update_displaychangelistener(&scon->dcl, 500);
 566        break;
 567    case SDL_WINDOWEVENT_CLOSE:
 568        if (qemu_console_is_graphic(scon->dcl.con)) {
 569            if (opts->has_window_close && !opts->window_close) {
 570                allow_close = false;
 571            }
 572            if (allow_close) {
 573                no_shutdown = 0;
 574                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 575            }
 576        } else {
 577            SDL_HideWindow(scon->real_window);
 578            scon->hidden = true;
 579        }
 580        break;
 581    case SDL_WINDOWEVENT_SHOWN:
 582        scon->hidden = false;
 583        break;
 584    case SDL_WINDOWEVENT_HIDDEN:
 585        scon->hidden = true;
 586        break;
 587    }
 588}
 589
 590void sdl2_poll_events(struct sdl2_console *scon)
 591{
 592    SDL_Event ev1, *ev = &ev1;
 593    bool allow_close = true;
 594    int idle = 1;
 595
 596    if (scon->last_vm_running != runstate_is_running()) {
 597        scon->last_vm_running = runstate_is_running();
 598        sdl_update_caption(scon);
 599    }
 600
 601    while (SDL_PollEvent(ev)) {
 602        switch (ev->type) {
 603        case SDL_KEYDOWN:
 604            idle = 0;
 605            handle_keydown(ev);
 606            break;
 607        case SDL_KEYUP:
 608            idle = 0;
 609            handle_keyup(ev);
 610            break;
 611        case SDL_TEXTINPUT:
 612            idle = 0;
 613            handle_textinput(ev);
 614            break;
 615        case SDL_QUIT:
 616            if (opts->has_window_close && !opts->window_close) {
 617                allow_close = false;
 618            }
 619            if (allow_close) {
 620                no_shutdown = 0;
 621                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 622            }
 623            break;
 624        case SDL_MOUSEMOTION:
 625            idle = 0;
 626            handle_mousemotion(ev);
 627            break;
 628        case SDL_MOUSEBUTTONDOWN:
 629        case SDL_MOUSEBUTTONUP:
 630            idle = 0;
 631            handle_mousebutton(ev);
 632            break;
 633        case SDL_MOUSEWHEEL:
 634            idle = 0;
 635            handle_mousewheel(ev);
 636            break;
 637        case SDL_WINDOWEVENT:
 638            handle_windowevent(ev);
 639            break;
 640        default:
 641            break;
 642        }
 643    }
 644
 645    if (idle) {
 646        if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 647            scon->idle_counter++;
 648            if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 649                scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 650            }
 651        }
 652    } else {
 653        scon->idle_counter = 0;
 654        scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 655    }
 656}
 657
 658static void sdl_mouse_warp(DisplayChangeListener *dcl,
 659                           int x, int y, int on)
 660{
 661    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 662
 663    if (!qemu_console_is_graphic(scon->dcl.con)) {
 664        return;
 665    }
 666
 667    if (on) {
 668        if (!guest_cursor) {
 669            sdl_show_cursor();
 670        }
 671        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 672            SDL_SetCursor(guest_sprite);
 673            if (!qemu_input_is_absolute() && !absolute_enabled) {
 674                SDL_WarpMouseInWindow(scon->real_window, x, y);
 675            }
 676        }
 677    } else if (gui_grab) {
 678        sdl_hide_cursor();
 679    }
 680    guest_cursor = on;
 681    guest_x = x, guest_y = y;
 682}
 683
 684static void sdl_mouse_define(DisplayChangeListener *dcl,
 685                             QEMUCursor *c)
 686{
 687
 688    if (guest_sprite) {
 689        SDL_FreeCursor(guest_sprite);
 690    }
 691
 692    if (guest_sprite_surface) {
 693        SDL_FreeSurface(guest_sprite_surface);
 694    }
 695
 696    guest_sprite_surface =
 697        SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 698                                 0xff0000, 0x00ff00, 0xff, 0xff000000);
 699
 700    if (!guest_sprite_surface) {
 701        fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 702        return;
 703    }
 704    guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 705                                         c->hot_x, c->hot_y);
 706    if (!guest_sprite) {
 707        fprintf(stderr, "Failed to make color cursor from %p\n", c);
 708        return;
 709    }
 710    if (guest_cursor &&
 711        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 712        SDL_SetCursor(guest_sprite);
 713    }
 714}
 715
 716static void sdl_cleanup(void)
 717{
 718    if (guest_sprite) {
 719        SDL_FreeCursor(guest_sprite);
 720    }
 721    SDL_QuitSubSystem(SDL_INIT_VIDEO);
 722}
 723
 724static const DisplayChangeListenerOps dcl_2d_ops = {
 725    .dpy_name             = "sdl2-2d",
 726    .dpy_gfx_update       = sdl2_2d_update,
 727    .dpy_gfx_switch       = sdl2_2d_switch,
 728    .dpy_gfx_check_format = sdl2_2d_check_format,
 729    .dpy_refresh          = sdl2_2d_refresh,
 730    .dpy_mouse_set        = sdl_mouse_warp,
 731    .dpy_cursor_define    = sdl_mouse_define,
 732};
 733
 734#ifdef CONFIG_OPENGL
 735static const DisplayChangeListenerOps dcl_gl_ops = {
 736    .dpy_name                = "sdl2-gl",
 737    .dpy_gfx_update          = sdl2_gl_update,
 738    .dpy_gfx_switch          = sdl2_gl_switch,
 739    .dpy_gfx_check_format    = console_gl_check_format,
 740    .dpy_refresh             = sdl2_gl_refresh,
 741    .dpy_mouse_set           = sdl_mouse_warp,
 742    .dpy_cursor_define       = sdl_mouse_define,
 743
 744    .dpy_gl_ctx_create       = sdl2_gl_create_context,
 745    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 746    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 747    .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 748    .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 749    .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 750    .dpy_gl_update           = sdl2_gl_scanout_flush,
 751};
 752#endif
 753
 754static void sdl2_display_early_init(DisplayOptions *o)
 755{
 756    assert(o->type == DISPLAY_TYPE_SDL);
 757    if (o->has_gl && o->gl) {
 758#ifdef CONFIG_OPENGL
 759        display_opengl = 1;
 760#endif
 761    }
 762}
 763
 764static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 765{
 766    int flags;
 767    uint8_t data = 0;
 768    char *filename;
 769    int i;
 770    SDL_SysWMinfo info;
 771
 772    assert(o->type == DISPLAY_TYPE_SDL);
 773    opts = o;
 774
 775#ifdef __linux__
 776    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 777     * accessible $DISPLAY to open X11 window.  This is often the case
 778     * when qemu is run using sudo.  But in this case, and when actually
 779     * run in X11 environment, SDL fights with X11 for the video card,
 780     * making current display unavailable, often until reboot.
 781     * So make x11 the default SDL video driver if this variable is unset.
 782     * This is a bit hackish but saves us from bigger problem.
 783     * Maybe it's a good idea to fix this in SDL instead.
 784     */
 785    setenv("SDL_VIDEODRIVER", "x11", 0);
 786#endif
 787
 788    flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 789    if (SDL_Init(flags)) {
 790        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 791                SDL_GetError());
 792        exit(1);
 793    }
 794    SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 795    memset(&info, 0, sizeof(info));
 796    SDL_VERSION(&info.version);
 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            sdl2_console[i].hidden = true;
 814        }
 815        sdl2_console[i].idx = i;
 816#ifdef CONFIG_OPENGL
 817        sdl2_console[i].opengl = display_opengl;
 818        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 819#else
 820        sdl2_console[i].opengl = 0;
 821        sdl2_console[i].dcl.ops = &dcl_2d_ops;
 822#endif
 823        sdl2_console[i].dcl.con = con;
 824        register_displaychangelistener(&sdl2_console[i].dcl);
 825
 826#if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 827        if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 828#if defined(SDL_VIDEO_DRIVER_WINDOWS)
 829            qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 830#elif defined(SDL_VIDEO_DRIVER_X11)
 831            qemu_console_set_window_id(con, info.info.x11.window);
 832#endif
 833        }
 834#endif
 835    }
 836
 837    /* Load a 32x32x4 image. White pixels are transparent. */
 838    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 839    if (filename) {
 840        SDL_Surface *image = SDL_LoadBMP(filename);
 841        if (image) {
 842            uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 843            SDL_SetColorKey(image, SDL_TRUE, colorkey);
 844            SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 845        }
 846        g_free(filename);
 847    }
 848
 849    if (opts->has_full_screen && opts->full_screen) {
 850        gui_fullscreen = 1;
 851        sdl_grab_start(0);
 852    }
 853
 854    mouse_mode_notifier.notify = sdl_mouse_mode_change;
 855    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 856
 857    gui_grab = 0;
 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