Initial import of qemu-2.4.1HEADmaster

1 files changed, 1003 insertions, 0 deletions

diff --git a/ui/sdl.c b/ui/sdl.c
new file mode 100644
index 00000000..3be29101
--- /dev/null
+++ b/ui/sdl.c
@@ -0,0 +1,1003 @@
+/*
+ * 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 "ui/input.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;
+
+#if 0
+#define DEBUG_SDL
+#endif
+
+static void sdl_update(DisplayChangeListener *dcl,
+                       int x, int y, int w, int h)
+{
+    SDL_Rect rec;
+    rec.x = x;
+    rec.y = y;
+    rec.w = w;
+    rec.h = h;
+
+#ifdef DEBUG_SDL
+    printf("SDL: Updating x=%d y=%d w=%d h=%d (scaling: %d)\n",
+           x, y, w, h, scaling_active);
+#endif
+
+    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;
+    SDL_Surface *tmp_screen;
+
+#ifdef DEBUG_SDL
+    printf("SDL: Resizing to %dx%d bpp %d\n", width, height, bpp);
+#endif
+
+    flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
+    if (gui_fullscreen) {
+        flags |= SDL_FULLSCREEN;
+    } else {
+        flags |= SDL_RESIZABLE;
+    }
+    if (gui_noframe)
+        flags |= SDL_NOFRAME;
+
+    tmp_screen = SDL_SetVideoMode(width, height, bpp, flags);
+    if (!real_screen) {
+        if (!tmp_screen) {
+            fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n",
+                    width, height, bpp, SDL_GetError());
+            exit(1);
+        }
+    } else {
+        /*
+         * Revert to the previous video mode if the change of resizing or
+         * resolution failed.
+         */
+        if (!tmp_screen) {
+            fprintf(stderr, "Failed to set SDL display (%dx%dx%d): %s\n",
+                    width, height, bpp, SDL_GetError());
+            return;
+        }
+    }
+
+    real_screen = tmp_screen;
+}
+
+static void sdl_switch(DisplayChangeListener *dcl,
+                       DisplaySurface *new_surface)
+{
+    PixelFormat pf;
+
+    /* temporary hack: allows to call sdl_switch to handle scaling changes */
+    if (new_surface) {
+        surface = new_surface;
+    }
+    pf = qemu_pixelformat_from_pixman(surface->format);
+
+    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);
+    }
+
+#ifdef DEBUG_SDL
+    printf("SDL: Creating surface with masks: %08x %08x %08x %08x\n",
+           pf.rmask, pf.gmask, pf.bmask, pf.amask);
+#endif
+
+    guest_screen = SDL_CreateRGBSurfaceFrom
+        (surface_data(surface),
+         surface_width(surface), surface_height(surface),
+         surface_bits_per_pixel(surface), surface_stride(surface),
+         pf.rmask, pf.gmask,
+         pf.bmask, pf.amask);
+}
+
+static bool sdl_check_format(DisplayChangeListener *dcl,
+                             pixman_format_code_t format)
+{
+    /*
+     * We let SDL convert for us a few more formats than,
+     * the native ones. Thes are the ones I have tested.
+     */
+    return (format == PIXMAN_x8r8g8b8 ||
+            format == PIXMAN_b8g8r8x8 ||
+            format == PIXMAN_x1r5g5b5 ||
+            format == PIXMAN_r5g6b5);
+}
+
+/* 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]) {
+            qemu_input_event_send_key_number(dcl->con, i, false);
+            modifiers_state[i] = 0;
+        }
+    }
+}
+
+static void sdl_process_key(SDL_KeyboardEvent *ev)
+{
+    int keycode;
+
+    if (ev->keysym.sym == SDLK_PAUSE) {
+        /* specific case */
+        qemu_input_event_send_key_qcode(dcl->con, Q_KEY_CODE_PAUSE,
+                                        ev->type == SDL_KEYDOWN);
+        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 */
+        qemu_input_event_send_key_number(dcl->con, keycode, true);
+        qemu_input_event_send_key_number(dcl->con, keycode, false);
+        return;
+#endif
+    }
+
+    /* now send the key code */
+    qemu_input_event_send_key_number(dcl->con, keycode,
+                                     ev->type == SDL_KEYDOWN);
+}
+
+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 (qemu_input_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 (!qemu_input_is_absolute() || !qemu_console_is_graphic(NULL)) {
+        SDL_ShowCursor(1);
+        if (guest_cursor &&
+                (gui_grab || qemu_input_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 (!qemu_input_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 (qemu_input_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 x, int y, int state)
+{
+    static uint32_t bmap[INPUT_BUTTON_MAX] = {
+        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
+        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
+        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
+        [INPUT_BUTTON_WHEEL_UP]   = SDL_BUTTON(SDL_BUTTON_WHEELUP),
+        [INPUT_BUTTON_WHEEL_DOWN] = SDL_BUTTON(SDL_BUTTON_WHEELDOWN),
+    };
+    static uint32_t prev_state;
+
+    if (prev_state != state) {
+        qemu_input_update_buttons(dcl->con, bmap, prev_state, state);
+        prev_state = state;
+    }
+
+    if (qemu_input_is_absolute()) {
+        qemu_input_queue_abs(dcl->con, INPUT_AXIS_X, x,
+                             real_screen->w);
+        qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, y,
+                             real_screen->h);
+    } else {
+        if (guest_cursor) {
+            x -= guest_x;
+            y -= guest_y;
+            guest_x += x;
+            guest_y += y;
+            dx = x;
+            dy = y;
+        }
+        qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, dx);
+        qemu_input_queue_rel(dcl->con, INPUT_AXIS_Y, dy);
+    }
+    qemu_input_event_sync();
+}
+
+static void sdl_scale(int width, int height)
+{
+    int bpp = real_screen->format->BitsPerPixel;
+
+#ifdef DEBUG_SDL
+    printf("SDL: Scaling to %dx%d bpp %d\n", width, height, bpp);
+#endif
+
+    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) &&
+        (qemu_input_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 || qemu_input_is_absolute() || absolute_enabled) {
+        sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel,
+                             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;
+
+    if (!qemu_console_is_graphic(NULL)) {
+        return;
+    }
+
+    bev = &ev->button;
+    if (!gui_grab && !qemu_input_is_absolute()) {
+        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
+            /* start grabbing all events */
+            sdl_grab_start();
+        }
+    } else {
+        if (ev->type == SDL_MOUSEBUTTONDOWN) {
+            buttonstate |= SDL_BUTTON(bev->button);
+        } else {
+            buttonstate &= ~SDL_BUTTON(bev->button);
+        }
+        sdl_send_mouse_event(0, 0, 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) &&
+        (qemu_input_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 || qemu_input_is_absolute() || absolute_enabled) {
+            SDL_SetCursor(guest_sprite);
+            if (!qemu_input_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 || qemu_input_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_gfx_check_format = sdl_check_format,
+    .dpy_refresh          = sdl_refresh,
+    .dpy_mouse_set        = sdl_mouse_warp,
+    .dpy_cursor_define    = sdl_mouse_define,
+};
+
+void sdl_display_early_init(int opengl)
+{
+    if (opengl == 1 /* on */) {
+        fprintf(stderr,
+                "SDL1 display code has no opengl support.\n"
+                "Please recompile qemu with SDL2, using\n"
+                "./configure --enable-sdl --with-sdlabi=2.0\n");
+    }
+}
+
+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__
+    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
+     * accessible $DISPLAY to open X11 window.  This is often the case
+     * when qemu is run using sudo.  But in this case, and when actually
+     * run in X11 environment, SDL fights with X11 for the video card,
+     * making current display unavailable, often until reboot.
+     * So make x11 the default SDL video driver if this variable is unset.
+     * This is a bit hackish but saves us from bigger problem.
+     * Maybe it's a good idea to fix this in SDL instead.
+     */
+    setenv("SDL_VIDEODRIVER", "x11", 0);
+#endif
+
+    /* Enable normal up/down events for Caps-Lock and Num-Lock keys.
+     * This requires SDL >= 1.2.14. */
+    setenv("SDL_DISABLE_LOCK_KEYS", "1", 1);
+
+    flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
+    if (SDL_Init (flags)) {
+        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
+                SDL_GetError());
+        exit(1);
+    }
+    vi = SDL_GetVideoInfo();
+    host_format = *(vi->vfmt);
+
+    /* Load a 32x32x4 image. White pixels are transparent. */
+    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
+    if (filename) {
+        SDL_Surface *image = SDL_LoadBMP(filename);
+        if (image) {
+            uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
+            SDL_SetColorKey(image, SDL_SRCCOLORKEY, colorkey);
+            SDL_WM_SetIcon(image, NULL);
+        }
+        g_free(filename);
+    }
+
+    if (full_screen) {
+        gui_fullscreen = 1;
+        sdl_grab_start();
+    }
+
+    dcl = g_malloc0(sizeof(DisplayChangeListener));
+    dcl->ops = &dcl_ops;
+    register_displaychangelistener(dcl);
+
+    mouse_mode_notifier.notify = sdl_mouse_mode_change;
+    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
+
+    sdl_update_caption();
+    SDL_EnableKeyRepeat(250, 50);
+    gui_grab = 0;
+
+    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
+    sdl_cursor_normal = SDL_GetCursor();
+
+    atexit(sdl_cleanup);
+}