/*

 * 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.

 */

#include "qemu-common.h"

#include "console.h"

#include "sysemu.h"

#include "gui_host.h"

#include <SDL.h>

#ifndef _WIN32

#include <signal.h>

#endif

static SDL_Surface *screen;

static int gui_noframe;

static int gui_key_modifier_pressed;

static int special_key_combination;

static int kbd_in_terminal_mode;

static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;

static uint8_t modifiers_state[256];

static int width, height;

static SDL_Cursor *sdl_cursor_normal;

static SDL_Cursor *sdl_cursor_hidden;

static SDL_Cursor *guest_sprite = 0;

static void sdl_update(DisplayState *ds, int x, int y, int w, int h)

{

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

    SDL_UpdateRect(screen, ds->x0 + x, ds->y0 + y, w, h);

}

static void sdl_gui_set_screen_size(int w, int h, int fullscreen_on)

{

    int flags;

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

    flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;

    if (fullscreen_on)

        flags |= SDL_FULLSCREEN;

    if (gui_noframe)

        flags |= SDL_NOFRAME;

    width = w;

    height = h;

 again:

    screen = SDL_SetVideoMode(width, height, 0, flags);

    if (!screen) {

        fprintf(stderr, "Could not open SDL display\n");

        exit(1);

    }

    if (!screen->pixels && (flags & SDL_HWSURFACE) && (flags & SDL_FULLSCREEN)) {

        flags &= ~SDL_HWSURFACE;

        goto again;

    }

    if (!screen->pixels) {

        fprintf(stderr, "Could not open SDL display\n");

        exit(1);

    }

}

static void sdl_gui_get_screen_data(screen_data_t *new_screen_data)

{

    new_screen_data->data = screen->pixels;

    new_screen_data->linesize = screen->pitch;

    new_screen_data->width = screen->w;

    new_screen_data->height = screen->h;

    new_screen_data->depth = screen->format->BitsPerPixel;

    /* SDL BitsPerPixel never indicates any values other than

       multiples of 8, so we need to check for strange depths. */

    if (new_screen_data->depth == 16) {

        uint32_t mask;

        mask = screen->format->Rmask;

        mask |= screen->format->Gmask;

        mask |= screen->format->Bmask;

        if ((mask & 0x8000) == 0)

            new_screen_data->depth = 15;

    }

    if (new_screen_data->depth == 32 && screen->format->Rshift == 0) {

        new_screen_data->bgr = 1;

    } else {

        new_screen_data->bgr = 0;

    }

}

/* generic keyboard conversion */

#include "sdl_keysym.h"

#include "keymaps.c"

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);

}

/* 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

static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)

{

    int keycode;

    keycode = ev->keysym.scancode;

    if (keycode < 9) {

        keycode = 0;

    } else if (keycode < 97) {

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

    } else if (keycode < 212) {

        /* use conversion table */

        keycode = _translate_keycode(keycode - 97);

    } 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 & 0x80)

                gui_notify_dev_key(0xe0);

            gui_notify_dev_key(i | 0x80);

            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 |= 0x80;

        gui_notify_dev_key(0xe1);

        gui_notify_dev_key(0x1d | v);

        gui_notify_dev_key(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;

    case 0x45: /* num lock */

    case 0x3a: /* caps lock */

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

        gui_notify_dev_key(keycode);

        gui_notify_dev_key(keycode | 0x80);

        return;

    }

    /* now send the key code */

    if (keycode & 0x80)

        gui_notify_dev_key(0xe0);

    if (ev->type == SDL_KEYUP)

        gui_notify_dev_key(keycode | 0x80);

    else

        gui_notify_dev_key(keycode & 0x7f);

}

static int sdl_state_to_qemu(int sdl_state)

{

    int buttons = 0;

    if (sdl_state & SDL_BUTTON(SDL_BUTTON_LEFT))

        buttons |= MOUSE_EVENT_LBUTTON;

    if (sdl_state & SDL_BUTTON(SDL_BUTTON_RIGHT))

        buttons |= MOUSE_EVENT_RBUTTON;

    if (sdl_state & SDL_BUTTON(SDL_BUTTON_MIDDLE))

        buttons |= MOUSE_EVENT_MBUTTON;

    return buttons;

}

static void sdl_gui_process_events(void)

{

    SDL_Event ev1, *ev = &ev1;

    int mod_state;

    int buttonstate = SDL_GetMouseState(NULL, NULL);

    gui_refresh_caption();

    /*vga_hw_update();*/

    SDL_EnableUNICODE(kbd_in_terminal_mode);

    while (SDL_PollEvent(ev)) {

        switch (ev->type) {

        case SDL_VIDEOEXPOSE:

            gui_notify_repaint_screen();

            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 */

                        if (gui_allows_fullscreen()) {

                            gui_notify_toggle_fullscreen();

                            special_key_combination = 1;

                        }

                        break;

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

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

                        reset_keys();

                        gui_notify_console_select(keycode - 0x02);

                        special_key_combination = 1;

                        break;

                    default:

                        break;

                    }

                } else if (kbd_in_terminal_mode) {

                    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) {

                        gui_notify_term_key(keysym);

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

                        gui_notify_term_key(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 (!special_key_combination) {

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

                            gui_notify_toggle_grabmode();

                            /* SDL does not send back all the

                               modifiers key, so we must correct it */

                            reset_keys();

                            break;

                        }

                        special_key_combination = 0;

                    }

                }

            }

            if (!kbd_in_terminal_mode && !special_key_combination)

                sdl_process_key(&ev->key);

            break;

        case SDL_QUIT:

            if (!no_quit)

                qemu_system_shutdown_request();

            break;

        case SDL_MOUSEMOTION:

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

                                    ev->motion.x, ev->motion.y, 

                                    sdl_state_to_qemu(ev->motion.state));

            break;

        case SDL_MOUSEBUTTONDOWN:

        case SDL_MOUSEBUTTONUP:

            {

                SDL_MouseButtonEvent *bev = &ev->button;

                int 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

                gui_notify_mouse_button(dz, bev->x, bev->y, sdl_state_to_qemu(buttonstate));

            }

            break;

        case SDL_ACTIVEEVENT:

            if (ev->active.state == SDL_APPINPUTFOCUS && !ev->active.gain) {

                gui_notify_input_focus_lost();

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

                gui_notify_app_focus(ev->active.gain);

            }

            break;

        default:

            break;

        }

    }

}

static void sdl_gui_set_kbd_terminal_mode(int on)

{

    kbd_in_terminal_mode = on;

}

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)

{

    gui_notify_mouse_warp(x, y, on);

}

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);

    gui_notify_new_guest_cursor();

}

static void sdl_cleanup(void)

{

    if (guest_sprite)

        SDL_FreeCursor(guest_sprite);

    SDL_Quit();

}

/******** GUI CALLBACKS **********/

static void sdl_gui_turn_cursor_on(gui_cursor_type_t cursor_type)

{

    SDL_ShowCursor(1);

    switch(cursor_type) {

    case GUI_CURSOR_NORMAL:

        SDL_SetCursor(sdl_cursor_normal);

        break;

    case GUI_CURSOR_GUEST_SPRITE:

        SDL_SetCursor(guest_sprite);

        break;

    case GUI_CURSOR_HIDDEN:

        SDL_SetCursor(sdl_cursor_hidden);

        break;

    case GUI_CURSOR_GRABBING:

        if (guest_sprite)

            SDL_SetCursor(guest_sprite);

        else

            SDL_SetCursor(sdl_cursor_normal);

        break;

    }

}

static void sdl_gui_turn_cursor_off(void)

{

    SDL_ShowCursor(0);

}

static void sdl_gui_mouse_warp(int x, int y)

{

    SDL_WarpMouse(x, y);

}

static void sdl_gui_grab_input_on(void)

{

    SDL_WM_GrabInput(SDL_GRAB_ON);

}

static void sdl_gui_grab_input_off(void)

{

    SDL_WM_GrabInput(SDL_GRAB_OFF);

}

static void sdl_gui_set_caption(const char* title, const char* icon)

{

    SDL_WM_SetCaption(title, icon);

}

static int sdl_gui_is_app_active(void)

{

    return (SDL_GetAppState() & SDL_APPACTIVE);

}

static void sdl_init_ds(DisplayState *ds)

{

    ds->dpy_update = sdl_update;

    ds->dpy_fill = sdl_fill;

    ds->mouse_set = sdl_mouse_warp;

    ds->cursor_define = sdl_mouse_define;

}

/*********************************/

void sdl_display_init(int full_screen, int no_frame)

{

    int flags;

    uint8_t data = 0;