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/*
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 * QEMU SDL display driver
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 * 
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 * Copyright (c) 2003 Fabrice Bellard
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 * 
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 * THE SOFTWARE.
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 */
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#include "vl.h"
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#include <SDL.h>
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#ifndef _WIN32
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#include <signal.h>
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#endif
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static SDL_Surface *screen;
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static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
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static int last_vm_running;
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static int gui_saved_grab;
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static int gui_fullscreen;
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static int gui_key_modifier_pressed;
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static int gui_keysym;
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static int gui_fullscreen_initial_grab;
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static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
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static uint8_t modifiers_state[256];
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static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
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{
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    //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
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    SDL_UpdateRect(screen, x, y, w, h);
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}
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static void sdl_resize(DisplayState *ds, int w, int h)
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{
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    int flags;
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    //    printf("resizing to %d %d\n", w, h);
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    flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
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    if (gui_fullscreen)
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        flags |= SDL_FULLSCREEN;
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    screen = SDL_SetVideoMode(w, h, 0, flags);
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    if (!screen) {
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        fprintf(stderr, "Could not open SDL display\n");
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        exit(1);
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    }
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    ds->data = screen->pixels;
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    ds->linesize = screen->pitch;
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    ds->depth = screen->format->BitsPerPixel;
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    ds->width = w;
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    ds->height = h;
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}
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/* generic keyboard conversion */
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#include "sdl_keysym.h"
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#include "keymaps.c"
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static kbd_layout_t *kbd_layout = NULL;
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static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
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{
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    int keysym;
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    /* workaround for X11+SDL bug with AltGR */
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    keysym = ev->keysym.sym;
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    if (keysym == 0 && ev->keysym.scancode == 113)
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        keysym = SDLK_MODE;
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    return keysym2scancode(kbd_layout, keysym);
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}
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/* specific keyboard conversions from scan codes */
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#if defined(_WIN32)
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static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
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{
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    return ev->keysym.scancode;
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}
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#else
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static const uint8_t x_keycode_to_pc_keycode[61] = {
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   0xc7,      /*  97  Home   */
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   0xc8,      /*  98  Up     */
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   0xc9,      /*  99  PgUp   */
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   0xcb,      /* 100  Left   */
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   0x4c,        /* 101  KP-5   */
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   0xcd,      /* 102  Right  */
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   0xcf,      /* 103  End    */
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   0xd0,      /* 104  Down   */
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   0xd1,      /* 105  PgDn   */
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   0xd2,      /* 106  Ins    */
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   0xd3,      /* 107  Del    */
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   0x9c,      /* 108  Enter  */
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   0x9d,      /* 109  Ctrl-R */
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   0x0,       /* 110  Pause  */
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   0xb7,      /* 111  Print  */
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   0xb5,      /* 112  Divide */
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   0xb8,      /* 113  Alt-R  */
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   0xc6,      /* 114  Break  */   
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   0x0,         /* 115 */
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   0x0,         /* 116 */
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   0x0,         /* 117 */
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   0x0,         /* 118 */
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   0x0,         /* 119 */
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   0x70,         /* 120 Hiragana_Katakana */
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   0x0,         /* 121 */
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   0x0,         /* 122 */
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   0x73,         /* 123 backslash */
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   0x0,         /* 124 */
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   0x0,         /* 125 */
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   0x0,         /* 126 */
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   0x0,         /* 127 */
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   0x0,         /* 128 */
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   0x79,         /* 129 Henkan */
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   0x0,         /* 130 */
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   0x7b,         /* 131 Muhenkan */
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   0x0,         /* 132 */
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   0x7d,         /* 133 Yen */
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   0x0,         /* 134 */
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   0x0,         /* 135 */
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   0x47,         /* 136 KP_7 */
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   0x48,         /* 137 KP_8 */
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   0x49,         /* 138 KP_9 */
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   0x4b,         /* 139 KP_4 */
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   0x4c,         /* 140 KP_5 */
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   0x4d,         /* 141 KP_6 */
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   0x4f,         /* 142 KP_1 */
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   0x50,         /* 143 KP_2 */
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   0x51,         /* 144 KP_3 */
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   0x52,         /* 145 KP_0 */
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   0x53,         /* 146 KP_. */
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   0x47,         /* 147 KP_HOME */
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   0x48,         /* 148 KP_UP */
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   0x49,         /* 149 KP_PgUp */
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   0x4b,         /* 150 KP_Left */
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   0x4c,         /* 151 KP_ */
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   0x4d,         /* 152 KP_Right */
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   0x4f,         /* 153 KP_End */
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   0x50,         /* 154 KP_Down */
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   0x51,         /* 155 KP_PgDn */
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   0x52,         /* 156 KP_Ins */
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   0x53,         /* 157 KP_Del */
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};
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static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
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{
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    int keycode;
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    keycode = ev->keysym.scancode;
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    if (keycode < 9) {
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        keycode = 0;
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    } else if (keycode < 97) {
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        keycode -= 8; /* just an offset */
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    } else if (keycode < 158) {
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        /* use conversion table */
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        keycode = x_keycode_to_pc_keycode[keycode - 97];
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    } else {
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        keycode = 0;
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    }
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    return keycode;
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}
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#endif
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static void reset_keys(void)
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{
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    int i;
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    for(i = 0; i < 256; i++) {
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        if (modifiers_state[i]) {
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            if (i & 0x80)
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                kbd_put_keycode(0xe0);
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            kbd_put_keycode(i | 0x80);
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            modifiers_state[i] = 0;
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        }
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    }
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}
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static void sdl_process_key(SDL_KeyboardEvent *ev)
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{
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    int keycode, v;
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    if (ev->keysym.sym == SDLK_PAUSE) {
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        /* specific case */
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        v = 0;
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        if (ev->type == SDL_KEYUP)
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            v |= 0x80;
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        kbd_put_keycode(0xe1);
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        kbd_put_keycode(0x1d | v);
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        kbd_put_keycode(0x45 | v);
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        return;
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    }
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    if (kbd_layout) {
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        keycode = sdl_keyevent_to_keycode_generic(ev);
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    } else {
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        keycode = sdl_keyevent_to_keycode(ev);
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    }
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    switch(keycode) {
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    case 0x00:
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        /* sent when leaving window: reset the modifiers state */
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        reset_keys();
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        return;
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    case 0x2a:                          /* Left Shift */
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    case 0x36:                          /* Right Shift */
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    case 0x1d:                          /* Left CTRL */
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    case 0x9d:                          /* Right CTRL */
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    case 0x38:                          /* Left ALT */
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    case 0xb8:                         /* Right ALT */
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        if (ev->type == SDL_KEYUP)
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            modifiers_state[keycode] = 0;
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        else
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            modifiers_state[keycode] = 1;
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        break;
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    case 0x45: /* num lock */
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    case 0x3a: /* caps lock */
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        /* SDL does not send the key up event, so we generate it */
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        kbd_put_keycode(keycode);
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        kbd_put_keycode(keycode | 0x80);
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        return;
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    }
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    /* now send the key code */
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    if (keycode & 0x80)
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        kbd_put_keycode(0xe0);
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    if (ev->type == SDL_KEYUP)
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        kbd_put_keycode(keycode | 0x80);
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    else
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        kbd_put_keycode(keycode & 0x7f);
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}
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static void sdl_update_caption(void)
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{
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    char buf[1024];
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    strcpy(buf, "QEMU");
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    if (!vm_running) {
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        strcat(buf, " [Stopped]");
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    }
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    if (gui_grab) {
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        strcat(buf, " - Press Ctrl-Alt to exit grab");
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    }
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    SDL_WM_SetCaption(buf, "QEMU");
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}
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static void sdl_grab_start(void)
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{
265
    SDL_ShowCursor(0);
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    SDL_WM_GrabInput(SDL_GRAB_ON);
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    /* dummy read to avoid moving the mouse */
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    SDL_GetRelativeMouseState(NULL, NULL);
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    gui_grab = 1;
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    sdl_update_caption();
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}
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static void sdl_grab_end(void)
274
{
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    SDL_WM_GrabInput(SDL_GRAB_OFF);
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    SDL_ShowCursor(1);
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    gui_grab = 0;
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    sdl_update_caption();
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}
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static void sdl_send_mouse_event(int dz)
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{
283
    int dx, dy, state, buttons;
284
    state = SDL_GetRelativeMouseState(&dx, &dy);
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    buttons = 0;
286
    if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
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        buttons |= MOUSE_EVENT_LBUTTON;
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    if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
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        buttons |= MOUSE_EVENT_RBUTTON;
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    if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
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        buttons |= MOUSE_EVENT_MBUTTON;
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    kbd_mouse_event(dx, dy, dz, buttons);
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}
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static void toggle_full_screen(DisplayState *ds)
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{
297
    gui_fullscreen = !gui_fullscreen;
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    sdl_resize(ds, screen->w, screen->h);
299
    if (gui_fullscreen) {
300
        gui_saved_grab = gui_grab;
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        sdl_grab_start();
302
    } else {
303
        if (!gui_saved_grab)
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            sdl_grab_end();
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    }
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    vga_invalidate_display();
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    vga_update_display();
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}
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310
static void sdl_refresh(DisplayState *ds)
311
{
312
    SDL_Event ev1, *ev = &ev1;
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    int mod_state;
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315
    if (last_vm_running != vm_running) {
316
        last_vm_running = vm_running;
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        sdl_update_caption();
318
    }
319

    
320
    if (is_active_console(vga_console)) 
321
        vga_update_display();
322

    
323
    while (SDL_PollEvent(ev)) {
324
        switch (ev->type) {
325
        case SDL_VIDEOEXPOSE:
326
            sdl_update(ds, 0, 0, screen->w, screen->h);
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            break;
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        case SDL_KEYDOWN:
329
        case SDL_KEYUP:
330
            if (ev->type == SDL_KEYDOWN) {
331
                mod_state = (SDL_GetModState() & gui_grab_code) ==
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                    gui_grab_code;
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                gui_key_modifier_pressed = mod_state;
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                if (gui_key_modifier_pressed) {
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                    int keycode;
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                    keycode = sdl_keyevent_to_keycode(&ev->key);
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                    switch(keycode) {
338
                    case 0x21: /* 'f' key on US keyboard */
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                        toggle_full_screen(ds);
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                        gui_keysym = 1;
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                        break;
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                    case 0x02 ... 0x0a: /* '1' to '9' keys */ 
343
                        console_select(keycode - 0x02);
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                        if (is_active_console(vga_console)) {
345
                            /* tell the vga console to redisplay itself */
346
                            vga_invalidate_display();
347
                        } else {
348
                            /* display grab if going to a text console */
349
                            if (gui_grab)
350
                                sdl_grab_end();
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                        }
352
                        gui_keysym = 1;
353
                        break;
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                    default:
355
                        break;
356
                    }
357
                } else if (!is_active_console(vga_console)) {
358
                    int keysym;
359
                    keysym = 0;
360
                    if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
361
                        switch(ev->key.keysym.sym) {
362
                        case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
363
                        case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
364
                        case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
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                        case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
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                        case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
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                        case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
368
                        case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
369
                        case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
370
                        default: break;
371
                        }
372
                    } else {
373
                        switch(ev->key.keysym.sym) {
374
                        case SDLK_UP: keysym = QEMU_KEY_UP; break;
375
                        case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
376
                        case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
377
                        case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
378
                        case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
379
                        case SDLK_END: keysym = QEMU_KEY_END; break;
380
                        case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
381
                        case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
382
                        case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;                        case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
383
                        default: break;
384
                        }
385
                    }
386
                    if (keysym) {
387
                        kbd_put_keysym(keysym);
388
                    } else if (ev->key.keysym.unicode != 0) {
389
                        kbd_put_keysym(ev->key.keysym.unicode);
390
                    }
391
                }
392
            } else if (ev->type == SDL_KEYUP) {
393
                mod_state = (ev->key.keysym.mod & gui_grab_code);
394
                if (!mod_state) {
395
                    if (gui_key_modifier_pressed) {
396
                        if (gui_keysym == 0) {
397
                            /* exit/enter grab if pressing Ctrl-Alt */
398
                            if (!gui_grab)
399
                                sdl_grab_start();
400
                            else
401
                                sdl_grab_end();
402
                            /* SDL does not send back all the
403
                               modifiers key, so we must correct it */
404
                            reset_keys();
405
                            break;
406
                        }
407
                        gui_key_modifier_pressed = 0;
408
                        gui_keysym = 0;
409
                    }
410
                }
411
            }
412
            if (is_active_console(vga_console)) 
413
                sdl_process_key(&ev->key);
414
            break;
415
        case SDL_QUIT:
416
            qemu_system_shutdown_request();
417
            break;
418
        case SDL_MOUSEMOTION:
419
            if (gui_grab) {
420
                sdl_send_mouse_event(0);
421
            }
422
            break;
423
        case SDL_MOUSEBUTTONDOWN:
424
        case SDL_MOUSEBUTTONUP:
425
            {
426
                SDL_MouseButtonEvent *bev = &ev->button;
427
                if (!gui_grab) {
428
                    if (ev->type == SDL_MOUSEBUTTONDOWN &&
429
                        (bev->state & SDL_BUTTON_LMASK)) {
430
                        /* start grabbing all events */
431
                        sdl_grab_start();
432
                    }
433
                } else {
434
                    int dz;
435
                    dz = 0;
436
#ifdef SDL_BUTTON_WHEELUP
437
                    if (bev->button == SDL_BUTTON_WHEELUP) {
438
                        dz = -1;
439
                    } else if (bev->button == SDL_BUTTON_WHEELDOWN) {
440
                        dz = 1;
441
                    }
442
#endif               
443
                    sdl_send_mouse_event(dz);
444
                }
445
            }
446
            break;
447
        case SDL_ACTIVEEVENT:
448
            if (gui_grab && (ev->active.gain & SDL_ACTIVEEVENTMASK) == 0 &&
449
                !gui_fullscreen_initial_grab) {
450
                sdl_grab_end();
451
            }
452
            break;
453
        default:
454
            break;
455
        }
456
    }
457
}
458

    
459
static void sdl_cleanup(void) 
460
{
461
    SDL_Quit();
462
}
463

    
464
void sdl_display_init(DisplayState *ds, int full_screen)
465
{
466
    int flags;
467

    
468
#if defined(__APPLE__)
469
    /* always use generic keymaps */
470
    if (!keyboard_layout)
471
        keyboard_layout = "en-us";
472
#endif
473
    if(keyboard_layout) {
474
        kbd_layout = init_keyboard_layout(keyboard_layout);
475
        if (!kbd_layout)
476
            exit(1);
477
    }
478

    
479
    flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
480
    if (SDL_Init (flags)) {
481
        fprintf(stderr, "Could not initialize SDL - exiting\n");
482
        exit(1);
483
    }
484
#ifndef _WIN32
485
    /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
486
    signal(SIGINT, SIG_DFL);
487
    signal(SIGQUIT, SIG_DFL);
488
#endif
489

    
490
    ds->dpy_update = sdl_update;
491
    ds->dpy_resize = sdl_resize;
492
    ds->dpy_refresh = sdl_refresh;
493

    
494
    sdl_resize(ds, 640, 400);
495
    sdl_update_caption();
496
    SDL_EnableKeyRepeat(250, 50);
497
    SDL_EnableUNICODE(1);
498
    gui_grab = 0;
499

    
500
    atexit(sdl_cleanup);
501
    if (full_screen) {
502
        gui_fullscreen = 1;
503
        gui_fullscreen_initial_grab = 1;
504
        sdl_grab_start();
505
    }
506
}