Archipelago » qemu

/*

 * QEMU SDL display driver

 *

 * Copyright (c) 2003 Fabrice Bellard

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */

#undef WIN32_LEAN_AND_MEAN

#include <SDL.h>

#include <SDL_syswm.h>

#include "qemu-common.h"

#include "ui/console.h"

#include "sysemu/sysemu.h"

#include "x_keymap.h"

#include "sdl_zoom.h"

static DisplayChangeListener *dcl;

static DisplaySurface *surface;

static SDL_Surface *real_screen;

static SDL_Surface *guest_screen = NULL;

static int gui_grab; /* if true, all keyboard/mouse events are grabbed */

static int last_vm_running;

static bool gui_saved_scaling;

static int gui_saved_width;

static int gui_saved_height;

static int gui_saved_grab;

static int gui_fullscreen;

static int gui_noframe;

static int gui_key_modifier_pressed;

static int gui_keysym;

static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;

static uint8_t modifiers_state[256];

static SDL_Cursor *sdl_cursor_normal;

static SDL_Cursor *sdl_cursor_hidden;

static int absolute_enabled = 0;

static int guest_cursor = 0;

static int guest_x, guest_y;

static SDL_Cursor *guest_sprite = NULL;

static SDL_PixelFormat host_format;

static int scaling_active = 0;

static Notifier mouse_mode_notifier;

static void sdl_update(DisplayChangeListener *dcl,

                       int x, int y, int w, int h)

{

    //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);

    SDL_Rect rec;

    rec.x = x;

    rec.y = y;

    rec.w = w;

    rec.h = h;

    if (guest_screen) {

        if (!scaling_active) {

            SDL_BlitSurface(guest_screen, &rec, real_screen, &rec);

        } else {

            if (sdl_zoom_blit(guest_screen, real_screen, SMOOTHING_ON, &rec) < 0) {

                fprintf(stderr, "Zoom blit failed\n");

                exit(1);

            }

        }

    } 

    SDL_UpdateRect(real_screen, rec.x, rec.y, rec.w, rec.h);

}

static void do_sdl_resize(int width, int height, int bpp)

{

    int flags;

    //    printf("resizing to %d %d\n", w, h);

    flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;

    if (gui_fullscreen) {

        flags |= SDL_FULLSCREEN;

    } else {

        flags |= SDL_RESIZABLE;

    }

    if (gui_noframe)

        flags |= SDL_NOFRAME;

    real_screen = SDL_SetVideoMode(width, height, bpp, flags);

    if (!real_screen) {

        fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n", width, 

                height, bpp, SDL_GetError());

        exit(1);

    }

}

static void sdl_switch(DisplayChangeListener *dcl,

                       DisplaySurface *new_surface)

{

    /* temporary hack: allows to call sdl_switch to handle scaling changes */

    if (new_surface) {

        surface = new_surface;

    }

    if (!scaling_active) {

        do_sdl_resize(surface_width(surface), surface_height(surface), 0);

    } else if (real_screen->format->BitsPerPixel !=

               surface_bits_per_pixel(surface)) {

        do_sdl_resize(real_screen->w, real_screen->h,

                      surface_bits_per_pixel(surface));

    }

    if (guest_screen != NULL) {

        SDL_FreeSurface(guest_screen);

    }

    guest_screen = SDL_CreateRGBSurfaceFrom

        (surface_data(surface),

         surface_width(surface), surface_height(surface),

         surface_bits_per_pixel(surface), surface_stride(surface),

         surface->pf.rmask, surface->pf.gmask,

         surface->pf.bmask, surface->pf.amask);

}

/* generic keyboard conversion */

#include "sdl_keysym.h"

static kbd_layout_t *kbd_layout = NULL;

static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)

{

    int keysym;

    /* workaround for X11+SDL bug with AltGR */

    keysym = ev->keysym.sym;

    if (keysym == 0 && ev->keysym.scancode == 113)

        keysym = SDLK_MODE;

    /* For Japanese key '\' and '|' */

    if (keysym == 92 && ev->keysym.scancode == 133) {

        keysym = 0xa5;

    }

    return keysym2scancode(kbd_layout, keysym) & SCANCODE_KEYMASK;

}

/* specific keyboard conversions from scan codes */

#if defined(_WIN32)

static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)

{

    return ev->keysym.scancode;

}

#else

#if defined(SDL_VIDEO_DRIVER_X11)

#include <X11/XKBlib.h>

static int check_for_evdev(void)

{

    SDL_SysWMinfo info;

    XkbDescPtr desc = NULL;

    int has_evdev = 0;

    char *keycodes = NULL;

    SDL_VERSION(&info.version);

    if (!SDL_GetWMInfo(&info)) {

        return 0;

    }

    desc = XkbGetKeyboard(info.info.x11.display,

                          XkbGBN_AllComponentsMask,

                          XkbUseCoreKbd);

    if (desc && desc->names) {

        keycodes = XGetAtomName(info.info.x11.display, desc->names->keycodes);

        if (keycodes == NULL) {

            fprintf(stderr, "could not lookup keycode name\n");

        } else if (strstart(keycodes, "evdev", NULL)) {

            has_evdev = 1;

        } else if (!strstart(keycodes, "xfree86", NULL)) {

            fprintf(stderr, "unknown keycodes `%s', please report to "

                    "qemu-devel@nongnu.org\n", keycodes);

        }

    }

    if (desc) {

        XkbFreeKeyboard(desc, XkbGBN_AllComponentsMask, True);

    }

    if (keycodes) {

        XFree(keycodes);

    }

    return has_evdev;

}

#else

static int check_for_evdev(void)

{

        return 0;

}

#endif

static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)

{

    int keycode;

    static int has_evdev = -1;

    if (has_evdev == -1)

        has_evdev = check_for_evdev();

    keycode = ev->keysym.scancode;

    if (keycode < 9) {

        keycode = 0;

    } else if (keycode < 97) {

        keycode -= 8; /* just an offset */

    } else if (keycode < 158) {

        /* use conversion table */

        if (has_evdev)

            keycode = translate_evdev_keycode(keycode - 97);

        else

            keycode = translate_xfree86_keycode(keycode - 97);

    } else if (keycode == 208) { /* Hiragana_Katakana */

        keycode = 0x70;

    } else if (keycode == 211) { /* backslash */

        keycode = 0x73;

    } else {

        keycode = 0;

    }

    return keycode;

}

#endif

static void reset_keys(void)

{

    int i;

    for(i = 0; i < 256; i++) {

        if (modifiers_state[i]) {

            if (i & SCANCODE_GREY)

                kbd_put_keycode(SCANCODE_EMUL0);

            kbd_put_keycode(i | SCANCODE_UP);

            modifiers_state[i] = 0;

        }

    }

}

static void sdl_process_key(SDL_KeyboardEvent *ev)

{

    int keycode, v;

    if (ev->keysym.sym == SDLK_PAUSE) {

        /* specific case */

        v = 0;

        if (ev->type == SDL_KEYUP)

            v |= SCANCODE_UP;

        kbd_put_keycode(0xe1);

        kbd_put_keycode(0x1d | v);

        kbd_put_keycode(0x45 | v);

        return;

    }

    if (kbd_layout) {

        keycode = sdl_keyevent_to_keycode_generic(ev);

    } else {

        keycode = sdl_keyevent_to_keycode(ev);

    }

    switch(keycode) {

    case 0x00:

        /* sent when leaving window: reset the modifiers state */

        reset_keys();

        return;

    case 0x2a:                          /* Left Shift */

    case 0x36:                          /* Right Shift */

    case 0x1d:                          /* Left CTRL */

    case 0x9d:                          /* Right CTRL */

    case 0x38:                          /* Left ALT */

    case 0xb8:                         /* Right ALT */

        if (ev->type == SDL_KEYUP)

            modifiers_state[keycode] = 0;

        else

            modifiers_state[keycode] = 1;

        break;

#define QEMU_SDL_VERSION ((SDL_MAJOR_VERSION << 8) + SDL_MINOR_VERSION)

#if QEMU_SDL_VERSION < 0x102 || QEMU_SDL_VERSION == 0x102 && SDL_PATCHLEVEL < 14

        /* SDL versions before 1.2.14 don't support key up for caps/num lock. */

    case 0x45: /* num lock */

    case 0x3a: /* caps lock */

        /* SDL does not send the key up event, so we generate it */

        kbd_put_keycode(keycode);

        kbd_put_keycode(keycode | SCANCODE_UP);

        return;

#endif

    }

    /* now send the key code */

    if (keycode & SCANCODE_GREY)

        kbd_put_keycode(SCANCODE_EMUL0);

    if (ev->type == SDL_KEYUP)

        kbd_put_keycode(keycode | SCANCODE_UP);

    else

        kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK);

}

static void sdl_update_caption(void)

{

    char win_title[1024];

    char icon_title[1024];

    const char *status = "";

    if (!runstate_is_running())

        status = " [Stopped]";

    else if (gui_grab) {

        if (alt_grab)

            status = " - Press Ctrl-Alt-Shift to exit mouse grab";

        else if (ctrl_grab)

            status = " - Press Right-Ctrl to exit mouse grab";

        else

            status = " - Press Ctrl-Alt to exit mouse grab";

    }

    if (qemu_name) {

        snprintf(win_title, sizeof(win_title), "QEMU (%s)%s", qemu_name, status);

        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);

    } else {

        snprintf(win_title, sizeof(win_title), "QEMU%s", status);

        snprintf(icon_title, sizeof(icon_title), "QEMU");

    }

    SDL_WM_SetCaption(win_title, icon_title);

}

static void sdl_hide_cursor(void)

{

    if (!cursor_hide)

        return;

    if (kbd_mouse_is_absolute()) {

        SDL_ShowCursor(1);

        SDL_SetCursor(sdl_cursor_hidden);

    } else {

        SDL_ShowCursor(0);

    }

}

static void sdl_show_cursor(void)

{

    if (!cursor_hide)

        return;

    if (!kbd_mouse_is_absolute() || !qemu_console_is_graphic(NULL)) {

        SDL_ShowCursor(1);

        if (guest_cursor &&

                (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))

            SDL_SetCursor(guest_sprite);

        else

            SDL_SetCursor(sdl_cursor_normal);

    }

}

static void sdl_grab_start(void)

{

    /*

     * If the application is not active, do not try to enter grab state. This

     * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the

     * application (SDL bug).

     */

    if (!(SDL_GetAppState() & SDL_APPINPUTFOCUS)) {

        return;

    }

    if (guest_cursor) {

        SDL_SetCursor(guest_sprite);

        if (!kbd_mouse_is_absolute() && !absolute_enabled)

            SDL_WarpMouse(guest_x, guest_y);

    } else

        sdl_hide_cursor();

    SDL_WM_GrabInput(SDL_GRAB_ON);

    gui_grab = 1;

    sdl_update_caption();

}

static void sdl_grab_end(void)

{

    SDL_WM_GrabInput(SDL_GRAB_OFF);

    gui_grab = 0;

    sdl_show_cursor();

    sdl_update_caption();

}

static void absolute_mouse_grab(void)

{

    int mouse_x, mouse_y;

    SDL_GetMouseState(&mouse_x, &mouse_y);

    if (mouse_x > 0 && mouse_x < real_screen->w - 1 &&

        mouse_y > 0 && mouse_y < real_screen->h - 1) {

        sdl_grab_start();

    }

}

static void sdl_mouse_mode_change(Notifier *notify, void *data)

{

    if (kbd_mouse_is_absolute()) {

        if (!absolute_enabled) {

            absolute_enabled = 1;

            if (qemu_console_is_graphic(NULL)) {

                absolute_mouse_grab();

            }

        }

    } else if (absolute_enabled) {

        if (!gui_fullscreen) {

            sdl_grab_end();

        }

        absolute_enabled = 0;

    }

}

static void sdl_send_mouse_event(int dx, int dy, int dz, int x, int y, int state)

{

    int buttons = 0;

    if (state & SDL_BUTTON(SDL_BUTTON_LEFT)) {

        buttons |= MOUSE_EVENT_LBUTTON;

    }

    if (state & SDL_BUTTON(SDL_BUTTON_RIGHT)) {

        buttons |= MOUSE_EVENT_RBUTTON;

    }

    if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE)) {

        buttons |= MOUSE_EVENT_MBUTTON;

    }

    if (kbd_mouse_is_absolute()) {

        dx = x * 0x7FFF / (real_screen->w - 1);

        dy = y * 0x7FFF / (real_screen->h - 1);

    } else if (guest_cursor) {

        x -= guest_x;

        y -= guest_y;

        guest_x += x;

        guest_y += y;

        dx = x;

        dy = y;

    }

    kbd_mouse_event(dx, dy, dz, buttons);

}

static void sdl_scale(int width, int height)

{

    int bpp = real_screen->format->BitsPerPixel;

    if (bpp != 16 && bpp != 32) {

        bpp = 32;

    }

    do_sdl_resize(width, height, bpp);

    scaling_active = 1;

}

static void toggle_full_screen(void)

{

    int width = surface_width(surface);

    int height = surface_height(surface);

    int bpp = surface_bits_per_pixel(surface);

    gui_fullscreen = !gui_fullscreen;

    if (gui_fullscreen) {

        gui_saved_width = real_screen->w;

        gui_saved_height = real_screen->h;

        gui_saved_scaling = scaling_active;

        do_sdl_resize(width, height, bpp);

        scaling_active = 0;

        gui_saved_grab = gui_grab;

        sdl_grab_start();

    } else {

        if (gui_saved_scaling) {

            sdl_scale(gui_saved_width, gui_saved_height);

        } else {

            do_sdl_resize(width, height, 0);

        }

        if (!gui_saved_grab || !qemu_console_is_graphic(NULL)) {

            sdl_grab_end();

        }

    }

    graphic_hw_invalidate(NULL);

    graphic_hw_update(NULL);

}

static void handle_keydown(SDL_Event *ev)

{

    int mod_state;

    int keycode;

    if (alt_grab) {

        mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==

                    (gui_grab_code | KMOD_LSHIFT);

    } else if (ctrl_grab) {

        mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;

    } else {

        mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;

    }

    gui_key_modifier_pressed = mod_state;

    if (gui_key_modifier_pressed) {

        keycode = sdl_keyevent_to_keycode(&ev->key);

        switch (keycode) {

        case 0x21: /* 'f' key on US keyboard */

            toggle_full_screen();

            gui_keysym = 1;

            break;

        case 0x16: /* 'u' key on US keyboard */

            if (scaling_active) {

                scaling_active = 0;

                sdl_switch(dcl, NULL);

                graphic_hw_invalidate(NULL);

                graphic_hw_update(NULL);

            }

            gui_keysym = 1;

            break;

        case 0x02 ... 0x0a: /* '1' to '9' keys */

            /* Reset the modifiers sent to the current console */

            reset_keys();

            console_select(keycode - 0x02);

            gui_keysym = 1;

            if (gui_fullscreen) {

                break;

            }

            if (!qemu_console_is_graphic(NULL)) {

                /* release grab if going to a text console */

                if (gui_grab) {

                    sdl_grab_end();

                } else if (absolute_enabled) {

                    sdl_show_cursor();

                }

            } else if (absolute_enabled) {

                sdl_hide_cursor();

                absolute_mouse_grab();

            }

            break;

        case 0x1b: /* '+' */

        case 0x35: /* '-' */

            if (!gui_fullscreen) {

                int width = MAX(real_screen->w + (keycode == 0x1b ? 50 : -50),

                                160);

                int height = (surface_height(surface) * width) /

                    surface_width(surface);

                sdl_scale(width, height);

                graphic_hw_invalidate(NULL);

                graphic_hw_update(NULL);

                gui_keysym = 1;

            }

        default:

            break;

        }

    } else if (!qemu_console_is_graphic(NULL)) {

        int keysym = 0;

        if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {

            switch (ev->key.keysym.sym) {

            case SDLK_UP:

                keysym = QEMU_KEY_CTRL_UP;

                break;

            case SDLK_DOWN:

                keysym = QEMU_KEY_CTRL_DOWN;

                break;

            case SDLK_LEFT:

                keysym = QEMU_KEY_CTRL_LEFT;

                break;

            case SDLK_RIGHT:

                keysym = QEMU_KEY_CTRL_RIGHT;

                break;

            case SDLK_HOME:

                keysym = QEMU_KEY_CTRL_HOME;

                break;

            case SDLK_END:

                keysym = QEMU_KEY_CTRL_END;

                break;

            case SDLK_PAGEUP:

                keysym = QEMU_KEY_CTRL_PAGEUP;

                break;

            case SDLK_PAGEDOWN:

                keysym = QEMU_KEY_CTRL_PAGEDOWN;

                break;

            default:

                break;

            }

        } else {

            switch (ev->key.keysym.sym) {

            case SDLK_UP:

                keysym = QEMU_KEY_UP;

                break;

            case SDLK_DOWN:

                keysym = QEMU_KEY_DOWN;

                break;

            case SDLK_LEFT:

                keysym = QEMU_KEY_LEFT;

                break;

            case SDLK_RIGHT:

                keysym = QEMU_KEY_RIGHT;

                break;

            case SDLK_HOME:

                keysym = QEMU_KEY_HOME;

                break;

            case SDLK_END:

                keysym = QEMU_KEY_END;

                break;

            case SDLK_PAGEUP:

                keysym = QEMU_KEY_PAGEUP;

                break;

            case SDLK_PAGEDOWN:

                keysym = QEMU_KEY_PAGEDOWN;

                break;

            case SDLK_BACKSPACE:

                keysym = QEMU_KEY_BACKSPACE;

                break;

            case SDLK_DELETE:

                keysym = QEMU_KEY_DELETE;

                break;

            default:

                break;

            }

        }

        if (keysym) {

            kbd_put_keysym(keysym);

        } else if (ev->key.keysym.unicode != 0) {

            kbd_put_keysym(ev->key.keysym.unicode);

        }

    }

    if (qemu_console_is_graphic(NULL) && !gui_keysym) {

        sdl_process_key(&ev->key);

    }

}

static void handle_keyup(SDL_Event *ev)

{

    int mod_state;

    if (!alt_grab) {

        mod_state = (ev->key.keysym.mod & gui_grab_code);

    } else {

        mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));

    }

    if (!mod_state && gui_key_modifier_pressed) {

        gui_key_modifier_pressed = 0;

        if (gui_keysym == 0) {

            /* exit/enter grab if pressing Ctrl-Alt */

            if (!gui_grab) {

                if (qemu_console_is_graphic(NULL)) {

                    sdl_grab_start();

                }

            } else if (!gui_fullscreen) {

                sdl_grab_end();

            }

            /* SDL does not send back all the modifiers key, so we must

             * correct it. */

            reset_keys();

            return;

        }

        gui_keysym = 0;

    }

    if (qemu_console_is_graphic(NULL) && !gui_keysym) {

        sdl_process_key(&ev->key);

    }

}

static void handle_mousemotion(SDL_Event *ev)

{

    int max_x, max_y;

    if (qemu_console_is_graphic(NULL) &&

        (kbd_mouse_is_absolute() || absolute_enabled)) {

        max_x = real_screen->w - 1;

        max_y = real_screen->h - 1;

        if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||

            ev->motion.x == max_x || ev->motion.y == max_y)) {

            sdl_grab_end();

        }

        if (!gui_grab &&

            (ev->motion.x > 0 && ev->motion.x < max_x &&

            ev->motion.y > 0 && ev->motion.y < max_y)) {

            sdl_grab_start();

        }

    }

    if (gui_grab || kbd_mouse_is_absolute() || absolute_enabled) {

        sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel, 0,

                             ev->motion.x, ev->motion.y, ev->motion.state);

    }

}

static void handle_mousebutton(SDL_Event *ev)

{

    int buttonstate = SDL_GetMouseState(NULL, NULL);

    SDL_MouseButtonEvent *bev;

    int dz;

    if (!qemu_console_is_graphic(NULL)) {

        return;

    }

    bev = &ev->button;

    if (!gui_grab && !kbd_mouse_is_absolute()) {

        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {

            /* start grabbing all events */

            sdl_grab_start();

        }

    } else {

        dz = 0;

        if (ev->type == SDL_MOUSEBUTTONDOWN) {

            buttonstate |= SDL_BUTTON(bev->button);

        } else {

            buttonstate &= ~SDL_BUTTON(bev->button);

        }

#ifdef SDL_BUTTON_WHEELUP

        if (bev->button == SDL_BUTTON_WHEELUP &&

            ev->type == SDL_MOUSEBUTTONDOWN) {

            dz = -1;

        } else if (bev->button == SDL_BUTTON_WHEELDOWN &&

                   ev->type == SDL_MOUSEBUTTONDOWN) {

            dz = 1;

        }

#endif

        sdl_send_mouse_event(0, 0, dz, bev->x, bev->y, buttonstate);

    }

}

static void handle_activation(SDL_Event *ev)

{

#ifdef _WIN32

    /* Disable grab if the window no longer has the focus

     * (Windows-only workaround) */

    if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&

        !ev->active.gain && !gui_fullscreen) {

        sdl_grab_end();

    }

#endif

    if (!gui_grab && ev->active.gain && qemu_console_is_graphic(NULL) &&

        (kbd_mouse_is_absolute() || absolute_enabled)) {

        absolute_mouse_grab();

    }

    if (ev->active.state & SDL_APPACTIVE) {

        if (ev->active.gain) {

            /* Back to default interval */

            update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);

        } else {

            /* Sleeping interval.  Not using the long default here as

             * sdl_refresh does not only update the guest screen, but

             * also checks for gui events. */

            update_displaychangelistener(dcl, 500);

        }

    }

}

static void sdl_refresh(DisplayChangeListener *dcl)

{

    SDL_Event ev1, *ev = &ev1;

    if (last_vm_running != runstate_is_running()) {

        last_vm_running = runstate_is_running();

        sdl_update_caption();

    }

    graphic_hw_update(NULL);

    SDL_EnableUNICODE(!qemu_console_is_graphic(NULL));

    while (SDL_PollEvent(ev)) {

        switch (ev->type) {

        case SDL_VIDEOEXPOSE:

            sdl_update(dcl, 0, 0, real_screen->w, real_screen->h);

            break;

        case SDL_KEYDOWN:

            handle_keydown(ev);

            break;

        case SDL_KEYUP:

            handle_keyup(ev);

            break;

        case SDL_QUIT:

            if (!no_quit) {

                no_shutdown = 0;

                qemu_system_shutdown_request();

            }

            break;

        case SDL_MOUSEMOTION:

            handle_mousemotion(ev);

            break;

        case SDL_MOUSEBUTTONDOWN:

        case SDL_MOUSEBUTTONUP:

            handle_mousebutton(ev);

            break;

        case SDL_ACTIVEEVENT:

            handle_activation(ev);

            break;

        case SDL_VIDEORESIZE:

            sdl_scale(ev->resize.w, ev->resize.h);

            graphic_hw_invalidate(NULL);

            graphic_hw_update(NULL);

            break;

        default:

            break;

        }

    }

}

static void sdl_mouse_warp(DisplayChangeListener *dcl,

                           int x, int y, int on)

{

    if (on) {

        if (!guest_cursor)

            sdl_show_cursor();

        if (gui_grab || kbd_mouse_is_absolute() || absolute_enabled) {

            SDL_SetCursor(guest_sprite);

            if (!kbd_mouse_is_absolute() && !absolute_enabled)

                SDL_WarpMouse(x, y);

        }

    } else if (gui_grab)

        sdl_hide_cursor();

    guest_cursor = on;

    guest_x = x, guest_y = y;

}

static void sdl_mouse_define(DisplayChangeListener *dcl,

                             QEMUCursor *c)

{

    uint8_t *image, *mask;

    int bpl;

    if (guest_sprite)

        SDL_FreeCursor(guest_sprite);

    bpl = cursor_get_mono_bpl(c);

    image = g_malloc0(bpl * c->height);

    mask  = g_malloc0(bpl * c->height);

    cursor_get_mono_image(c, 0x000000, image);

    cursor_get_mono_mask(c, 0, mask);

    guest_sprite = SDL_CreateCursor(image, mask, c->width, c->height,

                                    c->hot_x, c->hot_y);

    g_free(image);

    g_free(mask);

    if (guest_cursor &&

            (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))

        SDL_SetCursor(guest_sprite);

}

static void sdl_cleanup(void)

{

    if (guest_sprite)

        SDL_FreeCursor(guest_sprite);

    SDL_QuitSubSystem(SDL_INIT_VIDEO);

}

static const DisplayChangeListenerOps dcl_ops = {

    .dpy_name          = "sdl",

    .dpy_gfx_update    = sdl_update,

    .dpy_gfx_switch    = sdl_switch,

    .dpy_refresh       = sdl_refresh,

    .dpy_mouse_set     = sdl_mouse_warp,

    .dpy_cursor_define = sdl_mouse_define,

};

void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)

{

    int flags;

    uint8_t data = 0;

    const SDL_VideoInfo *vi;

    char *filename;

#if defined(__APPLE__)

    /* always use generic keymaps */

    if (!keyboard_layout)

        keyboard_layout = "en-us";

#endif

    if(keyboard_layout) {

        kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);

        if (!kbd_layout)

            exit(1);

    }

    if (no_frame)

        gui_noframe = 1;

    if (!full_screen) {

        setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0);

    }

#ifdef __linux__