sdl.c.svn-base

我们自己开发的一个OSEK操作系统！不知道可不可以？

        dy -= guest_y;
        guest_x += dx;
        guest_y += dy;
    }

    kbd_mouse_event(dx, dy, dz, buttons);
}

static void toggle_full_screen(DisplayState *ds)
{
    gui_fullscreen = !gui_fullscreen;
    sdl_resize(ds, screen->w, screen->h);
    if (gui_fullscreen) {
        gui_saved_grab = gui_grab;
        sdl_grab_start();
    } else {
        if (!gui_saved_grab)
            sdl_grab_end();
    }
    vga_hw_invalidate();
    vga_hw_update();
}

static void sdl_refresh(DisplayState *ds)
{
    SDL_Event ev1, *ev = &ev1;
    int mod_state;

    if (last_vm_running != vm_running) {
        last_vm_running = vm_running;
        sdl_update_caption();
    }

    vga_hw_update();

    while (SDL_PollEvent(ev)) {
        switch (ev->type) {
        case SDL_VIDEOEXPOSE:
            sdl_update(ds, 0, 0, screen->w, screen->h);
            break;
        case SDL_KEYDOWN:
        case SDL_KEYUP:
            if (ev->type == SDL_KEYDOWN) {
                if (!alt_grab) {
                    mod_state = (SDL_GetModState() & gui_grab_code) ==
                                gui_grab_code;
                } else {
                    mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
                                (gui_grab_code | KMOD_LSHIFT);
                }
                gui_key_modifier_pressed = mod_state;
                if (gui_key_modifier_pressed) {
                    int keycode;
                    keycode = sdl_keyevent_to_keycode(&ev->key);
                    switch(keycode) {
                    case 0x21: /* 'f' key on US keyboard */
                        toggle_full_screen(ds);
                        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);
                        if (!is_graphic_console()) {
                            /* display grab if going to a text console */
                            if (gui_grab)
                                sdl_grab_end();
                        }
                        gui_keysym = 1;
                        break;
                    default:
                        break;
                    }
                } else if (!is_graphic_console()) {
                    int keysym;
                    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);
                    }
                }
            } else if (ev->type == SDL_KEYUP) {
                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) {
                    if (gui_key_modifier_pressed) {
                        gui_key_modifier_pressed = 0;
                        if (gui_keysym == 0) {
                            /* exit/enter grab if pressing Ctrl-Alt */
                            if (!gui_grab) {
                                /* if the application is not active,
                                   do not try to enter grab state. It
                                   prevents
                                   'SDL_WM_GrabInput(SDL_GRAB_ON)'
                                   from blocking all the application
                                   (SDL bug). */
                                if (SDL_GetAppState() & SDL_APPACTIVE)
                                    sdl_grab_start();
                            } else {
                                sdl_grab_end();
                            }
                            /* SDL does not send back all the
                               modifiers key, so we must correct it */
                            reset_keys();
                            break;
                        }
                        gui_keysym = 0;
                    }
                }
            }
            if (is_graphic_console() && !gui_keysym)
                sdl_process_key(&ev->key);
            break;
        case SDL_QUIT:
            if (!no_quit) {
                qemu_system_shutdown_request();
                vm_start();	/* In case we're paused */
            }
            break;
        case SDL_MOUSEMOTION:
            if (gui_grab || kbd_mouse_is_absolute() ||
                absolute_enabled) {
                sdl_send_mouse_event(0);
            }
            break;
        case SDL_MOUSEBUTTONDOWN:
        case SDL_MOUSEBUTTONUP:
            {
                SDL_MouseButtonEvent *bev = &ev->button;
                if (!gui_grab && !kbd_mouse_is_absolute()) {
                    if (ev->type == SDL_MOUSEBUTTONDOWN &&
                        (bev->state & SDL_BUTTON_LMASK)) {
                        /* start grabbing all events */
                        sdl_grab_start();
                    }
                } else {
                    int dz;
                    dz = 0;
#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(dz);
                }
            }
            break;
        case SDL_ACTIVEEVENT:
            if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
                !ev->active.gain && !gui_fullscreen_initial_grab) {
                sdl_grab_end();
            }
            break;
        default:
            break;
        }
    }
}

static void sdl_fill(DisplayState *ds, int x, int y, int w, int h, uint32_t c)
{
    SDL_Rect dst = { x, y, w, h };
    SDL_FillRect(screen, &dst, c);
}

static void sdl_mouse_warp(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);
            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(int width, int height, int bpp,
                             int hot_x, int hot_y,
                             uint8_t *image, uint8_t *mask)
{
    uint8_t sprite[256], *line;
    int x, y, dst, bypl, src = 0;
    if (guest_sprite)
        SDL_FreeCursor(guest_sprite);

    memset(sprite, 0, 256);
    bypl = ((width * bpp + 31) >> 5) << 2;
    for (y = 0, dst = 0; y < height; y ++, image += bypl) {
        line = image;
        for (x = 0; x < width; x ++, dst ++) {
            switch (bpp) {
            case 24:
                src = *(line ++); src |= *(line ++); src |= *(line ++);
                break;
            case 16:
            case 15:
                src = *(line ++); src |= *(line ++);
                break;
            case 8:
                src = *(line ++);
                break;
            case 4:
                src = 0xf & (line[x >> 1] >> ((x & 1)) << 2);
                break;
            case 2:
                src = 3 & (line[x >> 2] >> ((x & 3)) << 1);
                break;
            case 1:
                src = 1 & (line[x >> 3] >> (x & 7));
                break;
            }
            if (!src)
                sprite[dst >> 3] |= (1 << (~dst & 7)) & mask[dst >> 3];
        }
    }
    guest_sprite = SDL_CreateCursor(sprite, mask, width, height, hot_x, hot_y);

    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_Quit();
}

void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
{
    int flags;
    uint8_t data = 0;

#if defined(__APPLE__)
    /* always use generic keymaps */
    if (!keyboard_layout)
        keyboard_layout = "en-us";
#endif
    if(keyboard_layout) {
        kbd_layout = init_keyboard_layout(keyboard_layout);
        if (!kbd_layout)
            exit(1);
    }

    if (no_frame)
        gui_noframe = 1;

    flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
    if (SDL_Init (flags)) {
        fprintf(stderr, "Could not initialize SDL - exiting\n");
        exit(1);
    }
#ifndef _WIN32
    /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
    signal(SIGINT, SIG_DFL);
    signal(SIGQUIT, SIG_DFL);
#endif

    ds->dpy_update = sdl_update;
    ds->dpy_resize = sdl_resize;
    ds->dpy_refresh = sdl_refresh;
    ds->dpy_fill = sdl_fill;
    ds->mouse_set = sdl_mouse_warp;
    ds->cursor_define = sdl_mouse_define;

    sdl_resize(ds, 640, 400);
    sdl_update_caption();
    SDL_EnableKeyRepeat(250, 50);
    SDL_EnableUNICODE(1);
    gui_grab = 0;

    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
    sdl_cursor_normal = SDL_GetCursor();

    atexit(sdl_cleanup);
    if (full_screen) {
        gui_fullscreen = 1;
        gui_fullscreen_initial_grab = 1;
        sdl_grab_start();
    }
}