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 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;

    flags |= SDL_RESIZABLE;

    screen = SDL_SetVideoMode(w, h, 0, flags);

    if (!screen) {

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

        exit(1);

    }

    ds->data = screen->pixels;

    ds->linesize = screen->pitch;

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

}

static const uint32_t x_keycode_to_pc_keycode[61] = {

   0x47e0,      /*  97  Home   */

   0x48e0,      /*  98  Up     */

   0x49e0,      /*  99  PgUp   */

   0x4be0,      /* 100  Left   */

   0x4c,        /* 101  KP-5   */

   0x4de0,      /* 102  Right  */

   0x4fe0,      /* 103  End    */

   0x50e0,      /* 104  Down   */

   0x51e0,      /* 105  PgDn   */

   0x52e0,      /* 106  Ins    */

   0x53e0,      /* 107  Del    */

   0x1ce0,      /* 108  Enter  */

   0x1de0,      /* 109  Ctrl-R */

   0x451de1,    /* 110  Pause  */

   0x37e0,      /* 111  Print  */

   0x35e0,      /* 112  Divide */

   0x38e0,      /* 113  Alt-R  */

   0x46e0,      /* 114  Break  */   

   0x0,         /* 115 */

   0x0,         /* 116 */

   0x0,         /* 117 */

   0x0,         /* 118 */

   0x0,         /* 119 */

   0x0,         /* 120 */

   0x0,         /* 121 */

   0x0,         /* 122 */

   0x0,         /* 123 */

   0x0,         /* 124 */

   0x0,         /* 125 */

   0x0,         /* 126 */

   0x0,         /* 127 */

   0x0,         /* 128 */

   0x0,         /* 129 */

   0x0,         /* 130 */

   0x0,         /* 131 */

   0x0,         /* 132 */

   0x0,         /* 133 */

   0x0,         /* 134 */

   0x0,         /* 135 */

   0x47,         /* 136 KP_7 */

   0x48,         /* 137 KP_8 */

   0x49,         /* 138 KP_9 */

   0x4b,         /* 139 KP_4 */

   0x4c,         /* 140 KP_5 */

   0x4d,         /* 141 KP_6 */

   0x4f,         /* 142 KP_1 */

   0x50,         /* 143 KP_2 */

   0x51,         /* 144 KP_3 */

   0x52,         /* 145 KP_0 */

   0x53,         /* 146 KP_. */

   0x47,         /* 147 KP_HOME */

   0x48,         /* 148 KP_UP */

   0x49,         /* 149 KP_PgUp */

   0x4b,         /* 150 KP_Left */

   0x4c,         /* 151 KP_ */

   0x4d,         /* 152 KP_Right */

   0x4f,         /* 153 KP_End */

   0x50,         /* 154 KP_Down */

   0x51,         /* 155 KP_PgDn */

   0x52,         /* 156 KP_Ins */

   0x53,         /* 157 KP_Del */

};

static void sdl_process_key(SDL_KeyboardEvent *ev)

{

    int keycode, v;

    /* XXX: not portable, but avoids complicated mappings */

    keycode = ev->keysym.scancode;

#ifdef _WIN32

    if (keycode < 97) {

        /* nothing to do */

    } else 

#else

    if (keycode < 9) {

        keycode = 0;

    } else if (keycode < 97) {

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

    } else 

#endif

    if (keycode < 158) {

        /* use conversion table */

        keycode = x_keycode_to_pc_keycode[keycode - 97];

    } else {

        keycode = 0;

    }

    /* now send the key code */

    while (keycode != 0) {

        v = keycode & 0xff;

        if (ev->type == SDL_KEYUP)

            v |= 0x80;

        kbd_put_keycode(v);

        keycode >>= 8;

    }

}

static void sdl_update_caption(void)

{

    char buf[1024];

    strcpy(buf, "QEMU");

    if (!vm_running) {

        strcat(buf, " [Stopped]");

    }

    if (gui_grab) {

        strcat(buf, " - Press Ctrl-Shift to exit grab");

    }

    SDL_WM_SetCaption(buf, "QEMU");

}

static void sdl_grab_start(void)

{

    SDL_ShowCursor(0);

    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);

    SDL_ShowCursor(1);

    gui_grab = 0;

    sdl_update_caption();

}

static void sdl_send_mouse_event(void)

{

    int dx, dy, dz, 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;

    /* XXX: test wheel */

    dz = 0;

#ifdef SDL_BUTTON_WHEELUP

    if (state & SDL_BUTTON(SDL_BUTTON_WHEELUP))

        dz--;

    if (state & SDL_BUTTON(SDL_BUTTON_WHEELDOWN))

        dz++;

#endif

    kbd_mouse_event(dx, dy, dz, buttons);

}

static void sdl_refresh(DisplayState *ds)

{

    SDL_Event ev1, *ev = &ev1;

    if (last_vm_running != vm_running) {

        last_vm_running = vm_running;

        sdl_update_caption();

    }

    vga_update_display();

    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 ((SDL_GetModState() & (KMOD_LSHIFT | KMOD_LCTRL)) ==

                    (KMOD_LSHIFT | KMOD_LCTRL)) {

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

                    if (!gui_grab)

                        sdl_grab_start();

                    else

                        sdl_grab_end();

                }

            }

            sdl_process_key(&ev->key);

            break;

        case SDL_QUIT:

            reset_requested = 1;

            break;

        case SDL_MOUSEMOTION:

            if (gui_grab) {

                sdl_send_mouse_event();

            }

            break;

        case SDL_MOUSEBUTTONDOWN:

        case SDL_MOUSEBUTTONUP:

            {

                SDL_MouseButtonEvent *bev = &ev->button;

                if (!gui_grab) {

                    if (ev->type == SDL_MOUSEBUTTONDOWN &&

                        (bev->state & SDL_BUTTON_LMASK)) {

                        /* start grabbing all events */

                        sdl_grab_start();

                    }

                } else {

                    sdl_send_mouse_event();

                }

            }

            break;

        default:

            break;

        }

    }

}

static void sdl_cleanup(void) 

{

    SDL_Quit();

}

void sdl_display_init(DisplayState *ds)

{

    int flags;

    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;

    sdl_resize(ds, 640, 400);

    sdl_update_caption();

    SDL_EnableKeyRepeat(250, 50);

    gui_grab = 0;

    atexit(sdl_cleanup);

}