qemu/ui/sdl.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
  25/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
  26#undef WIN32_LEAN_AND_MEAN
  27
  28#include "qemu/osdep.h"
  29#include <SDL.h>
  30#include <SDL_syswm.h>
  31
  32#include "qemu-common.h"
  33#include "qemu/cutils.h"
  34#include "ui/console.h"
  35#include "ui/input.h"
  36#include "sysemu/sysemu.h"
  37#include "x_keymap.h"
  38#include "sdl_zoom.h"
  39
  40static DisplayChangeListener *dcl;
  41static DisplaySurface *surface;
  42static SDL_Surface *real_screen;
  43static SDL_Surface *guest_screen = NULL;
  44static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  45static int last_vm_running;
  46static bool gui_saved_scaling;
  47static int gui_saved_width;
  48static int gui_saved_height;
  49static int gui_saved_grab;
  50static int gui_fullscreen;
  51static int gui_noframe;
  52static int gui_key_modifier_pressed;
  53static int gui_keysym;
  54static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  55static uint8_t modifiers_state[256];
  56static SDL_Cursor *sdl_cursor_normal;
  57static SDL_Cursor *sdl_cursor_hidden;
  58static int absolute_enabled = 0;
  59static int guest_cursor = 0;
  60static int guest_x, guest_y;
  61static SDL_Cursor *guest_sprite = NULL;
  62static SDL_PixelFormat host_format;
  63static int scaling_active = 0;
  64static Notifier mouse_mode_notifier;
  65static int idle_counter;
  66
  67#define SDL_REFRESH_INTERVAL_BUSY 10
  68#define SDL_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  69                            / SDL_REFRESH_INTERVAL_BUSY + 1)
  70
  71#if 0
  72#define DEBUG_SDL
  73#endif
  74
  75static void sdl_update(DisplayChangeListener *dcl,
  76                       int x, int y, int w, int h)
  77{
  78    SDL_Rect rec;
  79    rec.x = x;
  80    rec.y = y;
  81    rec.w = w;
  82    rec.h = h;
  83
  84#ifdef DEBUG_SDL
  85    printf("SDL: Updating x=%d y=%d w=%d h=%d (scaling: %d)\n",
  86           x, y, w, h, scaling_active);
  87#endif
  88
  89    if (guest_screen) {
  90        if (!scaling_active) {
  91            SDL_BlitSurface(guest_screen, &rec, real_screen, &rec);
  92        } else {
  93            if (sdl_zoom_blit(guest_screen, real_screen, SMOOTHING_ON, &rec) < 0) {
  94                fprintf(stderr, "Zoom blit failed\n");
  95                exit(1);
  96            }
  97        }
  98    } 
  99    SDL_UpdateRect(real_screen, rec.x, rec.y, rec.w, rec.h);
 100}
 101
 102static void do_sdl_resize(int width, int height, int bpp)
 103{
 104    int flags;
 105    SDL_Surface *tmp_screen;
 106
 107#ifdef DEBUG_SDL
 108    printf("SDL: Resizing to %dx%d bpp %d\n", width, height, bpp);
 109#endif
 110
 111    flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
 112    if (gui_fullscreen) {
 113        flags |= SDL_FULLSCREEN;
 114    } else {
 115        flags |= SDL_RESIZABLE;
 116    }
 117    if (gui_noframe)
 118        flags |= SDL_NOFRAME;
 119
 120    tmp_screen = SDL_SetVideoMode(width, height, bpp, flags);
 121    if (!real_screen) {
 122        if (!tmp_screen) {
 123            fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n",
 124                    width, height, bpp, SDL_GetError());
 125            exit(1);
 126        }
 127    } else {
 128        /*
 129         * Revert to the previous video mode if the change of resizing or
 130         * resolution failed.
 131         */
 132        if (!tmp_screen) {
 133            fprintf(stderr, "Failed to set SDL display (%dx%dx%d): %s\n",
 134                    width, height, bpp, SDL_GetError());
 135            return;
 136        }
 137    }
 138
 139    real_screen = tmp_screen;
 140}
 141
 142static void sdl_switch(DisplayChangeListener *dcl,
 143                       DisplaySurface *new_surface)
 144{
 145    PixelFormat pf;
 146
 147    /* temporary hack: allows to call sdl_switch to handle scaling changes */
 148    if (new_surface) {
 149        surface = new_surface;
 150    }
 151    pf = qemu_pixelformat_from_pixman(surface->format);
 152
 153    if (!scaling_active) {
 154        do_sdl_resize(surface_width(surface), surface_height(surface), 0);
 155    } else if (real_screen->format->BitsPerPixel !=
 156               surface_bits_per_pixel(surface)) {
 157        do_sdl_resize(real_screen->w, real_screen->h,
 158                      surface_bits_per_pixel(surface));
 159    }
 160
 161    if (guest_screen != NULL) {
 162        SDL_FreeSurface(guest_screen);
 163    }
 164
 165#ifdef DEBUG_SDL
 166    printf("SDL: Creating surface with masks: %08x %08x %08x %08x\n",
 167           pf.rmask, pf.gmask, pf.bmask, pf.amask);
 168#endif
 169
 170    guest_screen = SDL_CreateRGBSurfaceFrom
 171        (surface_data(surface),
 172         surface_width(surface), surface_height(surface),
 173         surface_bits_per_pixel(surface), surface_stride(surface),
 174         pf.rmask, pf.gmask,
 175         pf.bmask, pf.amask);
 176}
 177
 178static bool sdl_check_format(DisplayChangeListener *dcl,
 179                             pixman_format_code_t format)
 180{
 181    /*
 182     * We let SDL convert for us a few more formats than,
 183     * the native ones. Thes are the ones I have tested.
 184     */
 185    return (format == PIXMAN_x8r8g8b8 ||
 186            format == PIXMAN_b8g8r8x8 ||
 187            format == PIXMAN_x1r5g5b5 ||
 188            format == PIXMAN_r5g6b5);
 189}
 190
 191/* generic keyboard conversion */
 192
 193#include "sdl_keysym.h"
 194
 195static kbd_layout_t *kbd_layout = NULL;
 196
 197static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 198{
 199    int keysym;
 200    /* workaround for X11+SDL bug with AltGR */
 201    keysym = ev->keysym.sym;
 202    if (keysym == 0 && ev->keysym.scancode == 113)
 203        keysym = SDLK_MODE;
 204    /* For Japanese key '\' and '|' */
 205    if (keysym == 92 && ev->keysym.scancode == 133) {
 206        keysym = 0xa5;
 207    }
 208    return keysym2scancode(kbd_layout, keysym) & SCANCODE_KEYMASK;
 209}
 210
 211/* specific keyboard conversions from scan codes */
 212
 213#if defined(_WIN32)
 214
 215static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 216{
 217    return ev->keysym.scancode;
 218}
 219
 220#else
 221
 222#if defined(SDL_VIDEO_DRIVER_X11)
 223#include <X11/XKBlib.h>
 224
 225static int check_for_evdev(void)
 226{
 227    SDL_SysWMinfo info;
 228    XkbDescPtr desc = NULL;
 229    int has_evdev = 0;
 230    char *keycodes = NULL;
 231
 232    SDL_VERSION(&info.version);
 233    if (!SDL_GetWMInfo(&info)) {
 234        return 0;
 235    }
 236    desc = XkbGetMap(info.info.x11.display,
 237                     XkbGBN_AllComponentsMask,
 238                     XkbUseCoreKbd);
 239    if (desc &&
 240        (XkbGetNames(info.info.x11.display,
 241                     XkbKeycodesNameMask, desc) == Success)) {
 242        keycodes = XGetAtomName(info.info.x11.display, desc->names->keycodes);
 243        if (keycodes == NULL) {
 244            fprintf(stderr, "could not lookup keycode name\n");
 245        } else if (strstart(keycodes, "evdev", NULL)) {
 246            has_evdev = 1;
 247        } else if (!strstart(keycodes, "xfree86", NULL)) {
 248            fprintf(stderr, "unknown keycodes `%s', please report to "
 249                    "qemu-devel@nongnu.org\n", keycodes);
 250        }
 251    }
 252
 253    if (desc) {
 254        XkbFreeKeyboard(desc, XkbGBN_AllComponentsMask, True);
 255    }
 256    if (keycodes) {
 257        XFree(keycodes);
 258    }
 259    return has_evdev;
 260}
 261#else
 262static int check_for_evdev(void)
 263{
 264        return 0;
 265}
 266#endif
 267
 268static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 269{
 270    int keycode;
 271    static int has_evdev = -1;
 272
 273    if (has_evdev == -1)
 274        has_evdev = check_for_evdev();
 275
 276    keycode = ev->keysym.scancode;
 277
 278    if (keycode < 9) {
 279        keycode = 0;
 280    } else if (keycode < 97) {
 281        keycode -= 8; /* just an offset */
 282    } else if (keycode < 158) {
 283        /* use conversion table */
 284        if (has_evdev)
 285            keycode = translate_evdev_keycode(keycode - 97);
 286        else
 287            keycode = translate_xfree86_keycode(keycode - 97);
 288    } else if (keycode == 208) { /* Hiragana_Katakana */
 289        keycode = 0x70;
 290    } else if (keycode == 211) { /* backslash */
 291        keycode = 0x73;
 292    } else {
 293        keycode = 0;
 294    }
 295    return keycode;
 296}
 297
 298#endif
 299
 300static void reset_keys(void)
 301{
 302    int i;
 303    for(i = 0; i < 256; i++) {
 304        if (modifiers_state[i]) {
 305            qemu_input_event_send_key_number(dcl->con, i, false);
 306            modifiers_state[i] = 0;
 307        }
 308    }
 309}
 310
 311static void sdl_process_key(SDL_KeyboardEvent *ev)
 312{
 313    int keycode;
 314
 315    if (ev->keysym.sym == SDLK_PAUSE) {
 316        /* specific case */
 317        qemu_input_event_send_key_qcode(dcl->con, Q_KEY_CODE_PAUSE,
 318                                        ev->type == SDL_KEYDOWN);
 319        return;
 320    }
 321
 322    if (kbd_layout) {
 323        keycode = sdl_keyevent_to_keycode_generic(ev);
 324    } else {
 325        keycode = sdl_keyevent_to_keycode(ev);
 326    }
 327
 328    switch(keycode) {
 329    case 0x00:
 330        /* sent when leaving window: reset the modifiers state */
 331        reset_keys();
 332        return;
 333    case 0x2a:                          /* Left Shift */
 334    case 0x36:                          /* Right Shift */
 335    case 0x1d:                          /* Left CTRL */
 336    case 0x9d:                          /* Right CTRL */
 337    case 0x38:                          /* Left ALT */
 338    case 0xb8:                         /* Right ALT */
 339        if (ev->type == SDL_KEYUP)
 340            modifiers_state[keycode] = 0;
 341        else
 342            modifiers_state[keycode] = 1;
 343        break;
 344#define QEMU_SDL_VERSION ((SDL_MAJOR_VERSION << 8) + SDL_MINOR_VERSION)
 345#if QEMU_SDL_VERSION < 0x102 || QEMU_SDL_VERSION == 0x102 && SDL_PATCHLEVEL < 14
 346        /* SDL versions before 1.2.14 don't support key up for caps/num lock. */
 347    case 0x45: /* num lock */
 348    case 0x3a: /* caps lock */
 349        /* SDL does not send the key up event, so we generate it */
 350        qemu_input_event_send_key_number(dcl->con, keycode, true);
 351        qemu_input_event_send_key_number(dcl->con, keycode, false);
 352        return;
 353#endif
 354    }
 355
 356    /* now send the key code */
 357    qemu_input_event_send_key_number(dcl->con, keycode,
 358                                     ev->type == SDL_KEYDOWN);
 359}
 360
 361static void sdl_update_caption(void)
 362{
 363    char win_title[1024];
 364    char icon_title[1024];
 365    const char *status = "";
 366
 367    if (!runstate_is_running())
 368        status = " [Stopped]";
 369    else if (gui_grab) {
 370        if (alt_grab)
 371            status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 372        else if (ctrl_grab)
 373            status = " - Press Right-Ctrl to exit mouse grab";
 374        else
 375            status = " - Press Ctrl-Alt to exit mouse grab";
 376    }
 377
 378    if (qemu_name) {
 379        snprintf(win_title, sizeof(win_title), "QEMU (%s)%s", qemu_name, status);
 380        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 381    } else {
 382        snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 383        snprintf(icon_title, sizeof(icon_title), "QEMU");
 384    }
 385
 386    SDL_WM_SetCaption(win_title, icon_title);
 387}
 388
 389static void sdl_hide_cursor(void)
 390{
 391    if (!cursor_hide)
 392        return;
 393
 394    if (qemu_input_is_absolute()) {
 395        SDL_ShowCursor(1);
 396        SDL_SetCursor(sdl_cursor_hidden);
 397    } else {
 398        SDL_ShowCursor(0);
 399    }
 400}
 401
 402static void sdl_show_cursor(void)
 403{
 404    if (!cursor_hide)
 405        return;
 406
 407    if (!qemu_input_is_absolute() || !qemu_console_is_graphic(NULL)) {
 408        SDL_ShowCursor(1);
 409        if (guest_cursor &&
 410                (gui_grab || qemu_input_is_absolute() || absolute_enabled))
 411            SDL_SetCursor(guest_sprite);
 412        else
 413            SDL_SetCursor(sdl_cursor_normal);
 414    }
 415}
 416
 417static void sdl_grab_start(void)
 418{
 419    /*
 420     * If the application is not active, do not try to enter grab state. This
 421     * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 422     * application (SDL bug).
 423     */
 424    if (!(SDL_GetAppState() & SDL_APPINPUTFOCUS)) {
 425        return;
 426    }
 427    if (guest_cursor) {
 428        SDL_SetCursor(guest_sprite);
 429        if (!qemu_input_is_absolute() && !absolute_enabled) {
 430            SDL_WarpMouse(guest_x, guest_y);
 431        }
 432    } else
 433        sdl_hide_cursor();
 434    SDL_WM_GrabInput(SDL_GRAB_ON);
 435    gui_grab = 1;
 436    sdl_update_caption();
 437}
 438
 439static void sdl_grab_end(void)
 440{
 441    SDL_WM_GrabInput(SDL_GRAB_OFF);
 442    gui_grab = 0;
 443    sdl_show_cursor();
 444    sdl_update_caption();
 445}
 446
 447static void absolute_mouse_grab(void)
 448{
 449    int mouse_x, mouse_y;
 450
 451    SDL_GetMouseState(&mouse_x, &mouse_y);
 452    if (mouse_x > 0 && mouse_x < real_screen->w - 1 &&
 453        mouse_y > 0 && mouse_y < real_screen->h - 1) {
 454        sdl_grab_start();
 455    }
 456}
 457
 458static void sdl_mouse_mode_change(Notifier *notify, void *data)
 459{
 460    if (qemu_input_is_absolute()) {
 461        if (!absolute_enabled) {
 462            absolute_enabled = 1;
 463            if (qemu_console_is_graphic(NULL)) {
 464                absolute_mouse_grab();
 465            }
 466        }
 467    } else if (absolute_enabled) {
 468        if (!gui_fullscreen) {
 469            sdl_grab_end();
 470        }
 471        absolute_enabled = 0;
 472    }
 473}
 474
 475static void sdl_send_mouse_event(int dx, int dy, int x, int y, int state)
 476{
 477    static uint32_t bmap[INPUT_BUTTON__MAX] = {
 478        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 479        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 480        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 481        [INPUT_BUTTON_WHEEL_UP]   = SDL_BUTTON(SDL_BUTTON_WHEELUP),
 482        [INPUT_BUTTON_WHEEL_DOWN] = SDL_BUTTON(SDL_BUTTON_WHEELDOWN),
 483    };
 484    static uint32_t prev_state;
 485
 486    if (prev_state != state) {
 487        qemu_input_update_buttons(dcl->con, bmap, prev_state, state);
 488        prev_state = state;
 489    }
 490
 491    if (qemu_input_is_absolute()) {
 492        qemu_input_queue_abs(dcl->con, INPUT_AXIS_X, x,
 493                             0, real_screen->w);
 494        qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, y,
 495                             0, real_screen->h);
 496    } else {
 497        if (guest_cursor) {
 498            x -= guest_x;
 499            y -= guest_y;
 500            guest_x += x;
 501            guest_y += y;
 502            dx = x;
 503            dy = y;
 504        }
 505        qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, dx);
 506        qemu_input_queue_rel(dcl->con, INPUT_AXIS_Y, dy);
 507    }
 508    qemu_input_event_sync();
 509}
 510
 511static void sdl_scale(int width, int height)
 512{
 513    int bpp = real_screen->format->BitsPerPixel;
 514
 515#ifdef DEBUG_SDL
 516    printf("SDL: Scaling to %dx%d bpp %d\n", width, height, bpp);
 517#endif
 518
 519    if (bpp != 16 && bpp != 32) {
 520        bpp = 32;
 521    }
 522    do_sdl_resize(width, height, bpp);
 523    scaling_active = 1;
 524}
 525
 526static void toggle_full_screen(void)
 527{
 528    int width = surface_width(surface);
 529    int height = surface_height(surface);
 530    int bpp = surface_bits_per_pixel(surface);
 531
 532    gui_fullscreen = !gui_fullscreen;
 533    if (gui_fullscreen) {
 534        gui_saved_width = real_screen->w;
 535        gui_saved_height = real_screen->h;
 536        gui_saved_scaling = scaling_active;
 537
 538        do_sdl_resize(width, height, bpp);
 539        scaling_active = 0;
 540
 541        gui_saved_grab = gui_grab;
 542        sdl_grab_start();
 543    } else {
 544        if (gui_saved_scaling) {
 545            sdl_scale(gui_saved_width, gui_saved_height);
 546        } else {
 547            do_sdl_resize(width, height, 0);
 548        }
 549        if (!gui_saved_grab || !qemu_console_is_graphic(NULL)) {
 550            sdl_grab_end();
 551        }
 552    }
 553    graphic_hw_invalidate(NULL);
 554    graphic_hw_update(NULL);
 555}
 556
 557static void handle_keydown(SDL_Event *ev)
 558{
 559    int mod_state;
 560    int keycode;
 561
 562    if (alt_grab) {
 563        mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 564                    (gui_grab_code | KMOD_LSHIFT);
 565    } else if (ctrl_grab) {
 566        mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 567    } else {
 568        mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 569    }
 570    gui_key_modifier_pressed = mod_state;
 571
 572    if (gui_key_modifier_pressed) {
 573        keycode = sdl_keyevent_to_keycode(&ev->key);
 574        switch (keycode) {
 575        case 0x21: /* 'f' key on US keyboard */
 576            toggle_full_screen();
 577            gui_keysym = 1;
 578            break;
 579        case 0x16: /* 'u' key on US keyboard */
 580            if (scaling_active) {
 581                scaling_active = 0;
 582                sdl_switch(dcl, NULL);
 583                graphic_hw_invalidate(NULL);
 584                graphic_hw_update(NULL);
 585            }
 586            gui_keysym = 1;
 587            break;
 588        case 0x02 ... 0x0a: /* '1' to '9' keys */
 589            /* Reset the modifiers sent to the current console */
 590            reset_keys();
 591            console_select(keycode - 0x02);
 592            gui_keysym = 1;
 593            if (gui_fullscreen) {
 594                break;
 595            }
 596            if (!qemu_console_is_graphic(NULL)) {
 597                /* release grab if going to a text console */
 598                if (gui_grab) {
 599                    sdl_grab_end();
 600                } else if (absolute_enabled) {
 601                    sdl_show_cursor();
 602                }
 603            } else if (absolute_enabled) {
 604                sdl_hide_cursor();
 605                absolute_mouse_grab();
 606            }
 607            break;
 608        case 0x1b: /* '+' */
 609        case 0x35: /* '-' */
 610            if (!gui_fullscreen) {
 611                int width = MAX(real_screen->w + (keycode == 0x1b ? 50 : -50),
 612                                160);
 613                int height = (surface_height(surface) * width) /
 614                    surface_width(surface);
 615
 616                sdl_scale(width, height);
 617                graphic_hw_invalidate(NULL);
 618                graphic_hw_update(NULL);
 619                gui_keysym = 1;
 620            }
 621        default:
 622            break;
 623        }
 624    } else if (!qemu_console_is_graphic(NULL)) {
 625        int keysym = 0;
 626
 627        if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 628            switch (ev->key.keysym.sym) {
 629            case SDLK_UP:
 630                keysym = QEMU_KEY_CTRL_UP;
 631                break;
 632            case SDLK_DOWN:
 633                keysym = QEMU_KEY_CTRL_DOWN;
 634                break;
 635            case SDLK_LEFT:
 636                keysym = QEMU_KEY_CTRL_LEFT;
 637                break;
 638            case SDLK_RIGHT:
 639                keysym = QEMU_KEY_CTRL_RIGHT;
 640                break;
 641            case SDLK_HOME:
 642                keysym = QEMU_KEY_CTRL_HOME;
 643                break;
 644            case SDLK_END:
 645                keysym = QEMU_KEY_CTRL_END;
 646                break;
 647            case SDLK_PAGEUP:
 648                keysym = QEMU_KEY_CTRL_PAGEUP;
 649                break;
 650            case SDLK_PAGEDOWN:
 651                keysym = QEMU_KEY_CTRL_PAGEDOWN;
 652                break;
 653            default:
 654                break;
 655            }
 656        } else {
 657            switch (ev->key.keysym.sym) {
 658            case SDLK_UP:
 659                keysym = QEMU_KEY_UP;
 660                break;
 661            case SDLK_DOWN:
 662                keysym = QEMU_KEY_DOWN;
 663                break;
 664            case SDLK_LEFT:
 665                keysym = QEMU_KEY_LEFT;
 666                break;
 667            case SDLK_RIGHT:
 668                keysym = QEMU_KEY_RIGHT;
 669                break;
 670            case SDLK_HOME:
 671                keysym = QEMU_KEY_HOME;
 672                break;
 673            case SDLK_END:
 674                keysym = QEMU_KEY_END;
 675                break;
 676            case SDLK_PAGEUP:
 677                keysym = QEMU_KEY_PAGEUP;
 678                break;
 679            case SDLK_PAGEDOWN:
 680                keysym = QEMU_KEY_PAGEDOWN;
 681                break;
 682            case SDLK_BACKSPACE:
 683                keysym = QEMU_KEY_BACKSPACE;
 684                break;
 685            case SDLK_DELETE:
 686                keysym = QEMU_KEY_DELETE;
 687                break;
 688            default:
 689                break;
 690            }
 691        }
 692        if (keysym) {
 693            kbd_put_keysym(keysym);
 694        } else if (ev->key.keysym.unicode != 0) {
 695            kbd_put_keysym(ev->key.keysym.unicode);
 696        }
 697    }
 698    if (qemu_console_is_graphic(NULL) && !gui_keysym) {
 699        sdl_process_key(&ev->key);
 700    }
 701}
 702
 703static void handle_keyup(SDL_Event *ev)
 704{
 705    int mod_state;
 706
 707    if (!alt_grab) {
 708        mod_state = (ev->key.keysym.mod & gui_grab_code);
 709    } else {
 710        mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 711    }
 712    if (!mod_state && gui_key_modifier_pressed) {
 713        gui_key_modifier_pressed = 0;
 714        if (gui_keysym == 0) {
 715            /* exit/enter grab if pressing Ctrl-Alt */
 716            if (!gui_grab) {
 717                if (qemu_console_is_graphic(NULL)) {
 718                    sdl_grab_start();
 719                }
 720            } else if (!gui_fullscreen) {
 721                sdl_grab_end();
 722            }
 723            /* SDL does not send back all the modifiers key, so we must
 724             * correct it. */
 725            reset_keys();
 726            return;
 727        }
 728        gui_keysym = 0;
 729    }
 730    if (qemu_console_is_graphic(NULL) && !gui_keysym) {
 731        sdl_process_key(&ev->key);
 732    }
 733}
 734
 735static void handle_mousemotion(SDL_Event *ev)
 736{
 737    int max_x, max_y;
 738
 739    if (qemu_console_is_graphic(NULL) &&
 740        (qemu_input_is_absolute() || absolute_enabled)) {
 741        max_x = real_screen->w - 1;
 742        max_y = real_screen->h - 1;
 743        if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 744            ev->motion.x == max_x || ev->motion.y == max_y)) {
 745            sdl_grab_end();
 746        }
 747        if (!gui_grab &&
 748            (ev->motion.x > 0 && ev->motion.x < max_x &&
 749            ev->motion.y > 0 && ev->motion.y < max_y)) {
 750            sdl_grab_start();
 751        }
 752    }
 753    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 754        sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel,
 755                             ev->motion.x, ev->motion.y, ev->motion.state);
 756    }
 757}
 758
 759static void handle_mousebutton(SDL_Event *ev)
 760{
 761    int buttonstate = SDL_GetMouseState(NULL, NULL);
 762    SDL_MouseButtonEvent *bev;
 763
 764    if (!qemu_console_is_graphic(NULL)) {
 765        return;
 766    }
 767
 768    bev = &ev->button;
 769    if (!gui_grab && !qemu_input_is_absolute()) {
 770        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 771            /* start grabbing all events */
 772            sdl_grab_start();
 773        }
 774    } else {
 775        if (ev->type == SDL_MOUSEBUTTONDOWN) {
 776            buttonstate |= SDL_BUTTON(bev->button);
 777        } else {
 778            buttonstate &= ~SDL_BUTTON(bev->button);
 779        }
 780        sdl_send_mouse_event(0, 0, bev->x, bev->y, buttonstate);
 781    }
 782}
 783
 784static void handle_activation(SDL_Event *ev)
 785{
 786#ifdef _WIN32
 787    /* Disable grab if the window no longer has the focus
 788     * (Windows-only workaround) */
 789    if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 790        !ev->active.gain && !gui_fullscreen) {
 791        sdl_grab_end();
 792    }
 793#endif
 794    if (!gui_grab && ev->active.gain && qemu_console_is_graphic(NULL) &&
 795        (qemu_input_is_absolute() || absolute_enabled)) {
 796        absolute_mouse_grab();
 797    }
 798    if (ev->active.state & SDL_APPACTIVE) {
 799        if (ev->active.gain) {
 800            /* Back to default interval */
 801            update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 802        } else {
 803            /* Sleeping interval.  Not using the long default here as
 804             * sdl_refresh does not only update the guest screen, but
 805             * also checks for gui events. */
 806            update_displaychangelistener(dcl, 500);
 807        }
 808    }
 809}
 810
 811static void sdl_refresh(DisplayChangeListener *dcl)
 812{
 813    SDL_Event ev1, *ev = &ev1;
 814    int idle = 1;
 815
 816    if (last_vm_running != runstate_is_running()) {
 817        last_vm_running = runstate_is_running();
 818        sdl_update_caption();
 819    }
 820
 821    graphic_hw_update(NULL);
 822    SDL_EnableUNICODE(!qemu_console_is_graphic(NULL));
 823
 824    while (SDL_PollEvent(ev)) {
 825        switch (ev->type) {
 826        case SDL_VIDEOEXPOSE:
 827            sdl_update(dcl, 0, 0, real_screen->w, real_screen->h);
 828            break;
 829        case SDL_KEYDOWN:
 830            idle = 0;
 831            handle_keydown(ev);
 832            break;
 833        case SDL_KEYUP:
 834            idle = 0;
 835            handle_keyup(ev);
 836            break;
 837        case SDL_QUIT:
 838            if (!no_quit) {
 839                no_shutdown = 0;
 840                qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 841            }
 842            break;
 843        case SDL_MOUSEMOTION:
 844            idle = 0;
 845            handle_mousemotion(ev);
 846            break;
 847        case SDL_MOUSEBUTTONDOWN:
 848        case SDL_MOUSEBUTTONUP:
 849            idle = 0;
 850            handle_mousebutton(ev);
 851            break;
 852        case SDL_ACTIVEEVENT:
 853            handle_activation(ev);
 854            break;
 855        case SDL_VIDEORESIZE:
 856            sdl_scale(ev->resize.w, ev->resize.h);
 857            graphic_hw_invalidate(NULL);
 858            graphic_hw_update(NULL);
 859            break;
 860        default:
 861            break;
 862        }
 863    }
 864
 865    if (idle) {
 866        if (idle_counter < SDL_MAX_IDLE_COUNT) {
 867            idle_counter++;
 868            if (idle_counter >= SDL_MAX_IDLE_COUNT) {
 869                dcl->update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 870            }
 871        }
 872    } else {
 873        idle_counter = 0;
 874        dcl->update_interval = SDL_REFRESH_INTERVAL_BUSY;
 875    }
 876}
 877
 878static void sdl_mouse_warp(DisplayChangeListener *dcl,
 879                           int x, int y, int on)
 880{
 881    if (on) {
 882        if (!guest_cursor)
 883            sdl_show_cursor();
 884        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 885            SDL_SetCursor(guest_sprite);
 886            if (!qemu_input_is_absolute() && !absolute_enabled) {
 887                SDL_WarpMouse(x, y);
 888            }
 889        }
 890    } else if (gui_grab)
 891        sdl_hide_cursor();
 892    guest_cursor = on;
 893    guest_x = x, guest_y = y;
 894}
 895
 896static void sdl_mouse_define(DisplayChangeListener *dcl,
 897                             QEMUCursor *c)
 898{
 899    uint8_t *image, *mask;
 900    int bpl;
 901
 902    if (guest_sprite)
 903        SDL_FreeCursor(guest_sprite);
 904
 905    bpl = cursor_get_mono_bpl(c);
 906    image = g_malloc0(bpl * c->height);
 907    mask  = g_malloc0(bpl * c->height);
 908    cursor_get_mono_image(c, 0x000000, image);
 909    cursor_get_mono_mask(c, 0, mask);
 910    guest_sprite = SDL_CreateCursor(image, mask, c->width, c->height,
 911                                    c->hot_x, c->hot_y);
 912    g_free(image);
 913    g_free(mask);
 914
 915    if (guest_cursor &&
 916            (gui_grab || qemu_input_is_absolute() || absolute_enabled))
 917        SDL_SetCursor(guest_sprite);
 918}
 919
 920static void sdl_cleanup(void)
 921{
 922    if (guest_sprite)
 923        SDL_FreeCursor(guest_sprite);
 924    SDL_QuitSubSystem(SDL_INIT_VIDEO);
 925}
 926
 927static const DisplayChangeListenerOps dcl_ops = {
 928    .dpy_name             = "sdl",
 929    .dpy_gfx_update       = sdl_update,
 930    .dpy_gfx_switch       = sdl_switch,
 931    .dpy_gfx_check_format = sdl_check_format,
 932    .dpy_refresh          = sdl_refresh,
 933    .dpy_mouse_set        = sdl_mouse_warp,
 934    .dpy_cursor_define    = sdl_mouse_define,
 935};
 936
 937void sdl_display_early_init(int opengl)
 938{
 939    if (opengl == 1 /* on */) {
 940        fprintf(stderr,
 941                "SDL1 display code has no opengl support.\n"
 942                "Please recompile qemu with SDL2, using\n"
 943                "./configure --enable-sdl --with-sdlabi=2.0\n");
 944    }
 945}
 946
 947void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 948{
 949    int flags;
 950    uint8_t data = 0;
 951    const SDL_VideoInfo *vi;
 952    SDL_SysWMinfo info;
 953    char *filename;
 954
 955#if defined(__APPLE__)
 956    /* always use generic keymaps */
 957    if (!keyboard_layout)
 958        keyboard_layout = "en-us";
 959#endif
 960    if(keyboard_layout) {
 961        kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 962        if (!kbd_layout)
 963            exit(1);
 964    }
 965
 966    if (no_frame)
 967        gui_noframe = 1;
 968
 969    if (!full_screen) {
 970        setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0);
 971    }
 972#ifdef __linux__
 973    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 974     * accessible $DISPLAY to open X11 window.  This is often the case
 975     * when qemu is run using sudo.  But in this case, and when actually
 976     * run in X11 environment, SDL fights with X11 for the video card,
 977     * making current display unavailable, often until reboot.
 978     * So make x11 the default SDL video driver if this variable is unset.
 979     * This is a bit hackish but saves us from bigger problem.
 980     * Maybe it's a good idea to fix this in SDL instead.
 981     */
 982    setenv("SDL_VIDEODRIVER", "x11", 0);
 983#endif
 984
 985    /* Enable normal up/down events for Caps-Lock and Num-Lock keys.
 986     * This requires SDL >= 1.2.14. */
 987    setenv("SDL_DISABLE_LOCK_KEYS", "1", 1);
 988
 989    flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 990    if (SDL_Init (flags)) {
 991        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 992                SDL_GetError());
 993        exit(1);
 994    }
 995    vi = SDL_GetVideoInfo();
 996    host_format = *(vi->vfmt);
 997
 998    /* Load a 32x32x4 image. White pixels are transparent. */
 999    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
1000    if (filename) {
1001        SDL_Surface *image = SDL_LoadBMP(filename);
1002        if (image) {
1003            uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
1004            SDL_SetColorKey(image, SDL_SRCCOLORKEY, colorkey);
1005            SDL_WM_SetIcon(image, NULL);
1006        }
1007        g_free(filename);
1008    }
1009
1010    if (full_screen) {
1011        gui_fullscreen = 1;
1012        sdl_grab_start();
1013    }
1014
1015    dcl = g_new0(DisplayChangeListener, 1);
1016    dcl->ops = &dcl_ops;
1017    register_displaychangelistener(dcl);
1018
1019    mouse_mode_notifier.notify = sdl_mouse_mode_change;
1020    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
1021
1022    sdl_update_caption();
1023    SDL_EnableKeyRepeat(250, 50);
1024    gui_grab = 0;
1025
1026    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
1027    sdl_cursor_normal = SDL_GetCursor();
1028
1029    memset(&info, 0, sizeof(info));
1030    SDL_VERSION(&info.version);
1031    if (SDL_GetWMInfo(&info)) {
1032        int i;
1033        for (i = 0; ; i++) {
1034            /* All consoles share the same window */
1035            QemuConsole *con = qemu_console_lookup_by_index(i);
1036            if (con) {
1037#if defined(SDL_VIDEO_DRIVER_X11)
1038                qemu_console_set_window_id(con, info.info.x11.wmwindow);
1039#elif defined(SDL_VIDEO_DRIVER_NANOX) || \
1040      defined(SDL_VIDEO_DRIVER_WINDIB) || defined(SDL_VIDEO_DRIVER_DDRAW) || \
1041      defined(SDL_VIDEO_DRIVER_GAPI) || \
1042      defined(SDL_VIDEO_DRIVER_RISCOS)
1043                qemu_console_set_window_id(con, (int) (uintptr_t) info.window);
1044#else
1045                qemu_console_set_window_id(con, info.data);
1046#endif
1047            } else {
1048                break;
1049            }
1050        }
1051    }
1052
1053    atexit(sdl_cleanup);
1054}
1055