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.

 */

#include "vl.h"

#include <SDL.h>

#ifndef _WIN32

#include <signal.h>

#endif

static SDL_Surface *screen;

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

static int last_vm_running;

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_fullscreen_initial_grab;

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 int absolute_enabled = 0;

static int guest_cursor = 0;

static int guest_x, guest_y;

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, x, y, w, h);

}

static void sdl_resize(DisplayState *ds, int w, int h)

{

    int flags;

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

    flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;

    if (gui_fullscreen)

        flags |= SDL_FULLSCREEN;

    if (gui_noframe)

        flags |= SDL_NOFRAME;

    width = w;

    height = h;

 again:

    screen = SDL_SetVideoMode(w, h, 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);

    }

    ds->data = screen->pixels;

    ds->linesize = screen->pitch;

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

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

        ds->bgr = 1;

    } else {

        ds->bgr = 0;

    }

    ds->width = w;

    ds->height = h;

}

/* 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)

                kbd_put_keycode(0xe0);

            kbd_put_keycode(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;

        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;

    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 | 0x80);

        return;

    }

    /* now send the key code */

    if (keycode & 0x80)

        kbd_put_keycode(0xe0);

    if (ev->type == SDL_KEYUP)

        kbd_put_keycode(keycode | 0x80);

    else

        kbd_put_keycode(keycode & 0x7f);

}

static void sdl_update_caption(void)

{

    char buf[1024];

    const char *status = "";

    if (!vm_running)

        status = " [Stopped]";

    else if (gui_grab)

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

    if (qemu_name)

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

    else

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

    SDL_WM_SetCaption(buf, "QEMU");

}

static void sdl_hide_cursor(void)

{

    if (kbd_mouse_is_absolute()) {

        SDL_ShowCursor(1);

        SDL_SetCursor(sdl_cursor_hidden);

    } else {

        SDL_ShowCursor(0);

    }

}

static void sdl_show_cursor(void)

{

    if (!kbd_mouse_is_absolute()) {

        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 (guest_cursor) {

        SDL_SetCursor(guest_sprite);

        SDL_WarpMouse(guest_x, guest_y);

    } else

        sdl_hide_cursor();

    SDL_WM_GrabInput(SDL_GRAB_ON);

    /* dummy read to avoid moving the mouse */

    SDL_GetRelativeMouseState(NULL, NULL);

    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 sdl_send_mouse_event(int dz)

{

    int dx, dy, state, buttons;

    state = SDL_GetRelativeMouseState(&dx, &dy);

    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()) {

        if (!absolute_enabled) {

            sdl_hide_cursor();

            if (gui_grab) {

                sdl_grab_end();

            }

            absolute_enabled = 1;

        }

        SDL_GetMouseState(&dx, &dy);

        dx = dx * 0x7FFF / width;

        dy = dy * 0x7FFF / height;

    } else if (absolute_enabled) {

        sdl_show_cursor();

        absolute_enabled = 0;

    } else if (guest_cursor) {

        SDL_GetMouseState(&dx, &dy);

        dx -= guest_x;

        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) {

                mod_state = (SDL_GetModState() & gui_grab_code) ==

                    gui_grab_code;

                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) {

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

                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();

            }

            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();

    }

}