ui/sdl.c

   1 /*
   2  * QEMU SDL display driver
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 /* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
  26 #undef WIN32_LEAN_AND_MEAN
  27
  28 #include "qemu/osdep.h"
  29 #include <SDL.h>
  30 #include <SDL_syswm.h>
  31
  32 #include "qemu-common.h"
  33 #include "qemu/cutils.h"
  34 #include "ui/console.h"
  35 #include "ui/input.h"
  36 #include "sysemu/sysemu.h"
  37 #include "x_keymap.h"
  38 #include "sdl_zoom.h"
  39
  40 static DisplayChangeListener *dcl;
  41 static DisplaySurface *surface;
  42 static SDL_Surface *real_screen;
  43 static SDL_Surface *guest_screen = NULL;
  44 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  45 static int last_vm_running;
  46 static bool gui_saved_scaling;
  47 static int gui_saved_width;
  48 static int gui_saved_height;
  49 static int gui_saved_grab;
  50 static int gui_fullscreen;
  51 static int gui_noframe;
  52 static int gui_key_modifier_pressed;
  53 static int gui_keysym;
  54 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  55 static uint8_t modifiers_state[256];
  56 static SDL_Cursor *sdl_cursor_normal;
  57 static SDL_Cursor *sdl_cursor_hidden;
  58 static int absolute_enabled = 0;
  59 static int guest_cursor = 0;
  60 static int guest_x, guest_y;
  61 static SDL_Cursor *guest_sprite = NULL;
  62 static SDL_PixelFormat host_format;
  63 static int scaling_active = 0;
  64 static Notifier mouse_mode_notifier;
  65 static int idle_counter;
  66
  67 #define SDL_REFRESH_INTERVAL_BUSY 10
  68 #define SDL_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  69                             / SDL_REFRESH_INTERVAL_BUSY + 1)
  70
  71 #if 0
  72 #define DEBUG_SDL
  73 #endif
  74
  75 static void sdl_update(DisplayChangeListener *dcl,
  76                        int x, int y, int w, int h)
  77 {
  78     SDL_Rect rec;
  79     rec.x = x;
  80     rec.y = y;
  81     rec.w = w;
  82     rec.h = h;
  83
  84 #ifdef DEBUG_SDL
  85     printf("SDL: Updating x=%d y=%d w=%d h=%d (scaling: %d)\n",
  86            x, y, w, h, scaling_active);
  87 #endif
  88
  89     if (guest_screen) {
  90         if (!scaling_active) {
  91             SDL_BlitSurface(guest_screen, &rec, real_screen, &rec);
  92         } else {
  93             if (sdl_zoom_blit(guest_screen, real_screen, SMOOTHING_ON, &rec) < 0) {
  94                 fprintf(stderr, "Zoom blit failed\n");
  95                 exit(1);
  96             }
  97         }
  98     }
  99     SDL_UpdateRect(real_screen, rec.x, rec.y, rec.w, rec.h);
 100 }
 101
 102 static void do_sdl_resize(int width, int height, int bpp)
 103 {
 104     int flags;
 105     SDL_Surface *tmp_screen;
 106
 107 #ifdef DEBUG_SDL
 108     printf("SDL: Resizing to %dx%d bpp %d\n", width, height, bpp);
 109 #endif
 110
 111     flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
 112     if (gui_fullscreen) {
 113         flags |= SDL_FULLSCREEN;
 114     } else {
 115         flags |= SDL_RESIZABLE;
 116     }
 117     if (gui_noframe)
 118         flags |= SDL_NOFRAME;
 119
 120     tmp_screen = SDL_SetVideoMode(width, height, bpp, flags);
 121     if (!real_screen) {
 122         if (!tmp_screen) {
 123             fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n",
 124                     width, height, bpp, SDL_GetError());
 125             exit(1);
 126         }
 127     } else {
 128         /*
 129          * Revert to the previous video mode if the change of resizing or
 130          * resolution failed.
 131          */
 132         if (!tmp_screen) {
 133             fprintf(stderr, "Failed to set SDL display (%dx%dx%d): %s\n",
 134                     width, height, bpp, SDL_GetError());
 135             return;
 136         }
 137     }
 138
 139     real_screen = tmp_screen;
 140 }
 141
 142 static void sdl_switch(DisplayChangeListener *dcl,
 143                        DisplaySurface *new_surface)
 144 {
 145     PixelFormat pf;
 146
 147     /* temporary hack: allows to call sdl_switch to handle scaling changes */
 148     if (new_surface) {
 149         surface = new_surface;
 150     }
 151     pf = qemu_pixelformat_from_pixman(surface->format);
 152
 153     if (!scaling_active) {
 154         do_sdl_resize(surface_width(surface), surface_height(surface), 0);
 155     } else if (real_screen->format->BitsPerPixel !=
 156                surface_bits_per_pixel(surface)) {
 157         do_sdl_resize(real_screen->w, real_screen->h,
 158                       surface_bits_per_pixel(surface));
 159     }
 160
 161     if (guest_screen != NULL) {
 162         SDL_FreeSurface(guest_screen);
 163     }
 164
 165 #ifdef DEBUG_SDL
 166     printf("SDL: Creating surface with masks: %08x %08x %08x %08x\n",
 167            pf.rmask, pf.gmask, pf.bmask, pf.amask);
 168 #endif
 169
 170     guest_screen = SDL_CreateRGBSurfaceFrom
 171         (surface_data(surface),
 172          surface_width(surface), surface_height(surface),
 173          surface_bits_per_pixel(surface), surface_stride(surface),
 174          pf.rmask, pf.gmask,
 175          pf.bmask, pf.amask);
 176 }
 177
 178 static bool sdl_check_format(DisplayChangeListener *dcl,
 179                              pixman_format_code_t format)
 180 {
 181     /*
 182      * We let SDL convert for us a few more formats than,
 183      * the native ones. Thes are the ones I have tested.
 184      */
 185     return (format == PIXMAN_x8r8g8b8 ||
 186             format == PIXMAN_b8g8r8x8 ||
 187             format == PIXMAN_x1r5g5b5 ||
 188             format == PIXMAN_r5g6b5);
 189 }
 190
 191 /* generic keyboard conversion */
 192
 193 #include "sdl_keysym.h"
 194
 195 static kbd_layout_t *kbd_layout = NULL;
 196
 197 static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 198 {
 199     int keysym;
 200     /* workaround for X11+SDL bug with AltGR */
 201     keysym = ev->keysym.sym;
 202     if (keysym == 0 && ev->keysym.scancode == 113)
 203         keysym = SDLK_MODE;
 204     /* For Japanese key '\' and '|' */
 205     if (keysym == 92 && ev->keysym.scancode == 133) {
 206         keysym = 0xa5;
 207     }
 208     return keysym2scancode(kbd_layout, keysym) & SCANCODE_KEYMASK;
 209 }
 210
 211 /* specific keyboard conversions from scan codes */
 212
 213 #if defined(_WIN32)
 214
 215 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 216 {
 217     return ev->keysym.scancode;
 218 }
 219
 220 #else
 221
 222 #if defined(SDL_VIDEO_DRIVER_X11)
 223 #include <X11/XKBlib.h>
 224
 225 static int check_for_evdev(void)
 226 {
 227     SDL_SysWMinfo info;
 228     XkbDescPtr desc = NULL;
 229     int has_evdev = 0;
 230     char *keycodes = NULL;
 231
 232     SDL_VERSION(&info.version);
 233     if (!SDL_GetWMInfo(&info)) {
 234         return 0;
 235     }
 236     desc = XkbGetKeyboard(info.info.x11.display,
 237                           XkbGBN_AllComponentsMask,
 238                           XkbUseCoreKbd);
 239     if (desc && desc->names) {
 240         keycodes = XGetAtomName(info.info.x11.display, desc->names->keycodes);
 241         if (keycodes == NULL) {
 242             fprintf(stderr, "could not lookup keycode name\n");
 243         } else if (strstart(keycodes, "evdev", NULL)) {
 244             has_evdev = 1;
 245         } else if (!strstart(keycodes, "xfree86", NULL)) {
 246             fprintf(stderr, "unknown keycodes `%s', please report to "
 247                     "qemu-devel@nongnu.org\n", keycodes);
 248         }
 249     }
 250
 251     if (desc) {
 252         XkbFreeKeyboard(desc, XkbGBN_AllComponentsMask, True);
 253     }
 254     if (keycodes) {
 255         XFree(keycodes);
 256     }
 257     return has_evdev;
 258 }
 259 #else
 260 static int check_for_evdev(void)
 261 {
 262         return 0;
 263 }
 264 #endif
 265
 266 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 267 {
 268     int keycode;
 269     static int has_evdev = -1;
 270
 271     if (has_evdev == -1)
 272         has_evdev = check_for_evdev();
 273
 274     keycode = ev->keysym.scancode;
 275
 276     if (keycode < 9) {
 277         keycode = 0;
 278     } else if (keycode < 97) {
 279         keycode -= 8; /* just an offset */
 280     } else if (keycode < 158) {
 281         /* use conversion table */
 282         if (has_evdev)
 283             keycode = translate_evdev_keycode(keycode - 97);
 284         else
 285             keycode = translate_xfree86_keycode(keycode - 97);
 286     } else if (keycode == 208) { /* Hiragana_Katakana */
 287         keycode = 0x70;
 288     } else if (keycode == 211) { /* backslash */
 289         keycode = 0x73;
 290     } else {
 291         keycode = 0;
 292     }
 293     return keycode;
 294 }
 295
 296 #endif
 297
 298 static void reset_keys(void)
 299 {
 300     int i;
 301     for(i = 0; i < 256; i++) {
 302         if (modifiers_state[i]) {
 303             qemu_input_event_send_key_number(dcl->con, i, false);
 304             modifiers_state[i] = 0;
 305         }
 306     }
 307 }
 308
 309 static void sdl_process_key(SDL_KeyboardEvent *ev)
 310 {
 311     int keycode;
 312
 313     if (ev->keysym.sym == SDLK_PAUSE) {
 314         /* specific case */
 315         qemu_input_event_send_key_qcode(dcl->con, Q_KEY_CODE_PAUSE,
 316                                         ev->type == SDL_KEYDOWN);
 317         return;
 318     }
 319
 320     if (kbd_layout) {
 321         keycode = sdl_keyevent_to_keycode_generic(ev);
 322     } else {
 323         keycode = sdl_keyevent_to_keycode(ev);
 324     }
 325
 326     switch(keycode) {
 327     case 0x00:
 328         /* sent when leaving window: reset the modifiers state */
 329         reset_keys();
 330         return;
 331     case 0x2a:                          /* Left Shift */
 332     case 0x36:                          /* Right Shift */
 333     case 0x1d:                          /* Left CTRL */
 334     case 0x9d:                          /* Right CTRL */
 335     case 0x38:                          /* Left ALT */
 336     case 0xb8:                         /* Right ALT */
 337         if (ev->type == SDL_KEYUP)
 338             modifiers_state[keycode] = 0;
 339         else
 340             modifiers_state[keycode] = 1;
 341         break;
 342 #define QEMU_SDL_VERSION ((SDL_MAJOR_VERSION << 8) + SDL_MINOR_VERSION)
 343 #if QEMU_SDL_VERSION < 0x102 || QEMU_SDL_VERSION == 0x102 && SDL_PATCHLEVEL < 14
 344         /* SDL versions before 1.2.14 don't support key up for caps/num lock. */
 345     case 0x45: /* num lock */
 346     case 0x3a: /* caps lock */
 347         /* SDL does not send the key up event, so we generate it */
 348         qemu_input_event_send_key_number(dcl->con, keycode, true);
 349         qemu_input_event_send_key_number(dcl->con, keycode, false);
 350         return;
 351 #endif
 352     }
 353
 354     /* now send the key code */
 355     qemu_input_event_send_key_number(dcl->con, keycode,
 356                                      ev->type == SDL_KEYDOWN);
 357 }
 358
 359 static void sdl_update_caption(void)
 360 {
 361     char win_title[1024];
 362     char icon_title[1024];
 363     const char *status = "";
 364
 365     if (!runstate_is_running())
 366         status = " [Stopped]";
 367     else if (gui_grab) {
 368         if (alt_grab)
 369             status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 370         else if (ctrl_grab)
 371             status = " - Press Right-Ctrl to exit mouse grab";
 372         else
 373             status = " - Press Ctrl-Alt to exit mouse grab";
 374     }
 375
 376     if (qemu_name) {
 377         snprintf(win_title, sizeof(win_title), "QEMU (%s)%s", qemu_name, status);
 378         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 379     } else {
 380         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 381         snprintf(icon_title, sizeof(icon_title), "QEMU");
 382     }
 383
 384     SDL_WM_SetCaption(win_title, icon_title);
 385 }
 386
 387 static void sdl_hide_cursor(void)
 388 {
 389     if (!cursor_hide)
 390         return;
 391
 392     if (qemu_input_is_absolute()) {
 393         SDL_ShowCursor(1);
 394         SDL_SetCursor(sdl_cursor_hidden);
 395     } else {
 396         SDL_ShowCursor(0);
 397     }
 398 }
 399
 400 static void sdl_show_cursor(void)
 401 {
 402     if (!cursor_hide)
 403         return;
 404
 405     if (!qemu_input_is_absolute() || !qemu_console_is_graphic(NULL)) {
 406         SDL_ShowCursor(1);
 407         if (guest_cursor &&
 408                 (gui_grab || qemu_input_is_absolute() || absolute_enabled))
 409             SDL_SetCursor(guest_sprite);
 410         else
 411             SDL_SetCursor(sdl_cursor_normal);
 412     }
 413 }
 414
 415 static void sdl_grab_start(void)
 416 {
 417     /*
 418      * If the application is not active, do not try to enter grab state. This
 419      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 420      * application (SDL bug).
 421      */
 422     if (!(SDL_GetAppState() & SDL_APPINPUTFOCUS)) {
 423         return;
 424     }
 425     if (guest_cursor) {
 426         SDL_SetCursor(guest_sprite);
 427         if (!qemu_input_is_absolute() && !absolute_enabled) {
 428             SDL_WarpMouse(guest_x, guest_y);
 429         }
 430     } else
 431         sdl_hide_cursor();
 432     SDL_WM_GrabInput(SDL_GRAB_ON);
 433     gui_grab = 1;
 434     sdl_update_caption();
 435 }
 436
 437 static void sdl_grab_end(void)
 438 {
 439     SDL_WM_GrabInput(SDL_GRAB_OFF);
 440     gui_grab = 0;
 441     sdl_show_cursor();
 442     sdl_update_caption();
 443 }
 444
 445 static void absolute_mouse_grab(void)
 446 {
 447     int mouse_x, mouse_y;
 448
 449     SDL_GetMouseState(&mouse_x, &mouse_y);
 450     if (mouse_x > 0 && mouse_x < real_screen->w - 1 &&
 451         mouse_y > 0 && mouse_y < real_screen->h - 1) {
 452         sdl_grab_start();
 453     }
 454 }
 455
 456 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 457 {
 458     if (qemu_input_is_absolute()) {
 459         if (!absolute_enabled) {
 460             absolute_enabled = 1;
 461             if (qemu_console_is_graphic(NULL)) {
 462                 absolute_mouse_grab();
 463             }
 464         }
 465     } else if (absolute_enabled) {
 466         if (!gui_fullscreen) {
 467             sdl_grab_end();
 468         }
 469         absolute_enabled = 0;
 470     }
 471 }
 472
 473 static void sdl_send_mouse_event(int dx, int dy, int x, int y, int state)
 474 {
 475     static uint32_t bmap[INPUT_BUTTON__MAX] = {
 476         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 477         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 478         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 479         [INPUT_BUTTON_WHEEL_UP]   = SDL_BUTTON(SDL_BUTTON_WHEELUP),
 480         [INPUT_BUTTON_WHEEL_DOWN] = SDL_BUTTON(SDL_BUTTON_WHEELDOWN),
 481     };
 482     static uint32_t prev_state;
 483
 484     if (prev_state != state) {
 485         qemu_input_update_buttons(dcl->con, bmap, prev_state, state);
 486         prev_state = state;
 487     }
 488
 489     if (qemu_input_is_absolute()) {
 490         qemu_input_queue_abs(dcl->con, INPUT_AXIS_X, x,
 491                              real_screen->w);
 492         qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, y,
 493                              real_screen->h);
 494     } else {
 495         if (guest_cursor) {
 496             x -= guest_x;
 497             y -= guest_y;
 498             guest_x += x;
 499             guest_y += y;
 500             dx = x;
 501             dy = y;
 502         }
 503         qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, dx);
 504         qemu_input_queue_rel(dcl->con, INPUT_AXIS_Y, dy);
 505     }
 506     qemu_input_event_sync();
 507 }
 508
 509 static void sdl_scale(int width, int height)
 510 {
 511     int bpp = real_screen->format->BitsPerPixel;
 512
 513 #ifdef DEBUG_SDL
 514     printf("SDL: Scaling to %dx%d bpp %d\n", width, height, bpp);
 515 #endif
 516
 517     if (bpp != 16 && bpp != 32) {
 518         bpp = 32;
 519     }
 520     do_sdl_resize(width, height, bpp);
 521     scaling_active = 1;
 522 }
 523
 524 static void toggle_full_screen(void)
 525 {
 526     int width = surface_width(surface);
 527     int height = surface_height(surface);
 528     int bpp = surface_bits_per_pixel(surface);
 529
 530     gui_fullscreen = !gui_fullscreen;
 531     if (gui_fullscreen) {
 532         gui_saved_width = real_screen->w;
 533         gui_saved_height = real_screen->h;
 534         gui_saved_scaling = scaling_active;
 535
 536         do_sdl_resize(width, height, bpp);
 537         scaling_active = 0;
 538
 539         gui_saved_grab = gui_grab;
 540         sdl_grab_start();
 541     } else {
 542         if (gui_saved_scaling) {
 543             sdl_scale(gui_saved_width, gui_saved_height);
 544         } else {
 545             do_sdl_resize(width, height, 0);
 546         }
 547         if (!gui_saved_grab || !qemu_console_is_graphic(NULL)) {
 548             sdl_grab_end();
 549         }
 550     }
 551     graphic_hw_invalidate(NULL);
 552     graphic_hw_update(NULL);
 553 }
 554
 555 static void handle_keydown(SDL_Event *ev)
 556 {
 557     int mod_state;
 558     int keycode;
 559
 560     if (alt_grab) {
 561         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 562                     (gui_grab_code | KMOD_LSHIFT);
 563     } else if (ctrl_grab) {
 564         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 565     } else {
 566         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 567     }
 568     gui_key_modifier_pressed = mod_state;
 569
 570     if (gui_key_modifier_pressed) {
 571         keycode = sdl_keyevent_to_keycode(&ev->key);
 572         switch (keycode) {
 573         case 0x21: /* 'f' key on US keyboard */
 574             toggle_full_screen();
 575             gui_keysym = 1;
 576             break;
 577         case 0x16: /* 'u' key on US keyboard */
 578             if (scaling_active) {
 579                 scaling_active = 0;
 580                 sdl_switch(dcl, NULL);
 581                 graphic_hw_invalidate(NULL);
 582                 graphic_hw_update(NULL);
 583             }
 584             gui_keysym = 1;
 585             break;
 586         case 0x02 ... 0x0a: /* '1' to '9' keys */
 587             /* Reset the modifiers sent to the current console */
 588             reset_keys();
 589             console_select(keycode - 0x02);
 590             gui_keysym = 1;
 591             if (gui_fullscreen) {
 592                 break;
 593             }
 594             if (!qemu_console_is_graphic(NULL)) {
 595                 /* release grab if going to a text console */
 596                 if (gui_grab) {
 597                     sdl_grab_end();
 598                 } else if (absolute_enabled) {
 599                     sdl_show_cursor();
 600                 }
 601             } else if (absolute_enabled) {
 602                 sdl_hide_cursor();
 603                 absolute_mouse_grab();
 604             }
 605             break;
 606         case 0x1b: /* '+' */
 607         case 0x35: /* '-' */
 608             if (!gui_fullscreen) {
 609                 int width = MAX(real_screen->w + (keycode == 0x1b ? 50 : -50),
 610                                 160);
 611                 int height = (surface_height(surface) * width) /
 612                     surface_width(surface);
 613
 614                 sdl_scale(width, height);
 615                 graphic_hw_invalidate(NULL);
 616                 graphic_hw_update(NULL);
 617                 gui_keysym = 1;
 618             }
 619         default:
 620             break;
 621         }
 622     } else if (!qemu_console_is_graphic(NULL)) {
 623         int keysym = 0;
 624
 625         if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 626             switch (ev->key.keysym.sym) {
 627             case SDLK_UP:
 628                 keysym = QEMU_KEY_CTRL_UP;
 629                 break;
 630             case SDLK_DOWN:
 631                 keysym = QEMU_KEY_CTRL_DOWN;
 632                 break;
 633             case SDLK_LEFT:
 634                 keysym = QEMU_KEY_CTRL_LEFT;
 635                 break;
 636             case SDLK_RIGHT:
 637                 keysym = QEMU_KEY_CTRL_RIGHT;
 638                 break;
 639             case SDLK_HOME:
 640                 keysym = QEMU_KEY_CTRL_HOME;
 641                 break;
 642             case SDLK_END:
 643                 keysym = QEMU_KEY_CTRL_END;
 644                 break;
 645             case SDLK_PAGEUP:
 646                 keysym = QEMU_KEY_CTRL_PAGEUP;
 647                 break;
 648             case SDLK_PAGEDOWN:
 649                 keysym = QEMU_KEY_CTRL_PAGEDOWN;
 650                 break;
 651             default:
 652                 break;
 653             }
 654         } else {
 655             switch (ev->key.keysym.sym) {
 656             case SDLK_UP:
 657                 keysym = QEMU_KEY_UP;
 658                 break;
 659             case SDLK_DOWN:
 660                 keysym = QEMU_KEY_DOWN;
 661                 break;
 662             case SDLK_LEFT:
 663                 keysym = QEMU_KEY_LEFT;
 664                 break;
 665             case SDLK_RIGHT:
 666                 keysym = QEMU_KEY_RIGHT;
 667                 break;
 668             case SDLK_HOME:
 669                 keysym = QEMU_KEY_HOME;
 670                 break;
 671             case SDLK_END:
 672                 keysym = QEMU_KEY_END;
 673                 break;
 674             case SDLK_PAGEUP:
 675                 keysym = QEMU_KEY_PAGEUP;
 676                 break;
 677             case SDLK_PAGEDOWN:
 678                 keysym = QEMU_KEY_PAGEDOWN;
 679                 break;
 680             case SDLK_BACKSPACE:
 681                 keysym = QEMU_KEY_BACKSPACE;
 682                 break;
 683             case SDLK_DELETE:
 684                 keysym = QEMU_KEY_DELETE;
 685                 break;
 686             default:
 687                 break;
 688             }
 689         }
 690         if (keysym) {
 691             kbd_put_keysym(keysym);
 692         } else if (ev->key.keysym.unicode != 0) {
 693             kbd_put_keysym(ev->key.keysym.unicode);
 694         }
 695     }
 696     if (qemu_console_is_graphic(NULL) && !gui_keysym) {
 697         sdl_process_key(&ev->key);
 698     }
 699 }
 700
 701 static void handle_keyup(SDL_Event *ev)
 702 {
 703     int mod_state;
 704
 705     if (!alt_grab) {
 706         mod_state = (ev->key.keysym.mod & gui_grab_code);
 707     } else {
 708         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 709     }
 710     if (!mod_state && gui_key_modifier_pressed) {
 711         gui_key_modifier_pressed = 0;
 712         if (gui_keysym == 0) {
 713             /* exit/enter grab if pressing Ctrl-Alt */
 714             if (!gui_grab) {
 715                 if (qemu_console_is_graphic(NULL)) {
 716                     sdl_grab_start();
 717                 }
 718             } else if (!gui_fullscreen) {
 719                 sdl_grab_end();
 720             }
 721             /* SDL does not send back all the modifiers key, so we must
 722              * correct it. */
 723             reset_keys();
 724             return;
 725         }
 726         gui_keysym = 0;
 727     }
 728     if (qemu_console_is_graphic(NULL) && !gui_keysym) {
 729         sdl_process_key(&ev->key);
 730     }
 731 }
 732
 733 static void handle_mousemotion(SDL_Event *ev)
 734 {
 735     int max_x, max_y;
 736
 737     if (qemu_console_is_graphic(NULL) &&
 738         (qemu_input_is_absolute() || absolute_enabled)) {
 739         max_x = real_screen->w - 1;
 740         max_y = real_screen->h - 1;
 741         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 742             ev->motion.x == max_x || ev->motion.y == max_y)) {
 743             sdl_grab_end();
 744         }
 745         if (!gui_grab &&
 746             (ev->motion.x > 0 && ev->motion.x < max_x &&
 747             ev->motion.y > 0 && ev->motion.y < max_y)) {
 748             sdl_grab_start();
 749         }
 750     }
 751     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 752         sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel,
 753                              ev->motion.x, ev->motion.y, ev->motion.state);
 754     }
 755 }
 756
 757 static void handle_mousebutton(SDL_Event *ev)
 758 {
 759     int buttonstate = SDL_GetMouseState(NULL, NULL);
 760     SDL_MouseButtonEvent *bev;
 761
 762     if (!qemu_console_is_graphic(NULL)) {
 763         return;
 764     }
 765
 766     bev = &ev->button;
 767     if (!gui_grab && !qemu_input_is_absolute()) {
 768         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 769             /* start grabbing all events */
 770             sdl_grab_start();
 771         }
 772     } else {
 773         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 774             buttonstate |= SDL_BUTTON(bev->button);
 775         } else {
 776             buttonstate &= ~SDL_BUTTON(bev->button);
 777         }
 778         sdl_send_mouse_event(0, 0, bev->x, bev->y, buttonstate);
 779     }
 780 }
 781
 782 static void handle_activation(SDL_Event *ev)
 783 {
 784 #ifdef _WIN32
 785     /* Disable grab if the window no longer has the focus
 786      * (Windows-only workaround) */
 787     if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 788         !ev->active.gain && !gui_fullscreen) {
 789         sdl_grab_end();
 790     }
 791 #endif
 792     if (!gui_grab && ev->active.gain && qemu_console_is_graphic(NULL) &&
 793         (qemu_input_is_absolute() || absolute_enabled)) {
 794         absolute_mouse_grab();
 795     }
 796     if (ev->active.state & SDL_APPACTIVE) {
 797         if (ev->active.gain) {
 798             /* Back to default interval */
 799             update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 800         } else {
 801             /* Sleeping interval.  Not using the long default here as
 802              * sdl_refresh does not only update the guest screen, but
 803              * also checks for gui events. */
 804             update_displaychangelistener(dcl, 500);
 805         }
 806     }
 807 }
 808
 809 static void sdl_refresh(DisplayChangeListener *dcl)
 810 {
 811     SDL_Event ev1, *ev = &ev1;
 812     int idle = 1;
 813
 814     if (last_vm_running != runstate_is_running()) {
 815         last_vm_running = runstate_is_running();
 816         sdl_update_caption();
 817     }
 818
 819     graphic_hw_update(NULL);
 820     SDL_EnableUNICODE(!qemu_console_is_graphic(NULL));
 821
 822     while (SDL_PollEvent(ev)) {
 823         switch (ev->type) {
 824         case SDL_VIDEOEXPOSE:
 825             sdl_update(dcl, 0, 0, real_screen->w, real_screen->h);
 826             break;
 827         case SDL_KEYDOWN:
 828             idle = 0;
 829             handle_keydown(ev);
 830             break;
 831         case SDL_KEYUP:
 832             idle = 0;
 833             handle_keyup(ev);
 834             break;
 835         case SDL_QUIT:
 836             if (!no_quit) {
 837                 no_shutdown = 0;
 838                 qemu_system_shutdown_request();
 839             }
 840             break;
 841         case SDL_MOUSEMOTION:
 842             idle = 0;
 843             handle_mousemotion(ev);
 844             break;
 845         case SDL_MOUSEBUTTONDOWN:
 846         case SDL_MOUSEBUTTONUP:
 847             idle = 0;
 848             handle_mousebutton(ev);
 849             break;
 850         case SDL_ACTIVEEVENT:
 851             handle_activation(ev);
 852             break;
 853         case SDL_VIDEORESIZE:
 854             sdl_scale(ev->resize.w, ev->resize.h);
 855             graphic_hw_invalidate(NULL);
 856             graphic_hw_update(NULL);
 857             break;
 858         default:
 859             break;
 860         }
 861     }
 862
 863     if (idle) {
 864         if (idle_counter < SDL_MAX_IDLE_COUNT) {
 865             idle_counter++;
 866             if (idle_counter >= SDL_MAX_IDLE_COUNT) {
 867                 dcl->update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 868             }
 869         }
 870     } else {
 871         idle_counter = 0;
 872         dcl->update_interval = SDL_REFRESH_INTERVAL_BUSY;
 873     }
 874 }
 875
 876 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 877                            int x, int y, int on)
 878 {
 879     if (on) {
 880         if (!guest_cursor)
 881             sdl_show_cursor();
 882         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 883             SDL_SetCursor(guest_sprite);
 884             if (!qemu_input_is_absolute() && !absolute_enabled) {
 885                 SDL_WarpMouse(x, y);
 886             }
 887         }
 888     } else if (gui_grab)
 889         sdl_hide_cursor();
 890     guest_cursor = on;
 891     guest_x = x, guest_y = y;
 892 }
 893
 894 static void sdl_mouse_define(DisplayChangeListener *dcl,
 895                              QEMUCursor *c)
 896 {
 897     uint8_t *image, *mask;
 898     int bpl;
 899
 900     if (guest_sprite)
 901         SDL_FreeCursor(guest_sprite);
 902
 903     bpl = cursor_get_mono_bpl(c);
 904     image = g_malloc0(bpl * c->height);
 905     mask  = g_malloc0(bpl * c->height);
 906     cursor_get_mono_image(c, 0x000000, image);
 907     cursor_get_mono_mask(c, 0, mask);
 908     guest_sprite = SDL_CreateCursor(image, mask, c->width, c->height,
 909                                     c->hot_x, c->hot_y);
 910     g_free(image);
 911     g_free(mask);
 912
 913     if (guest_cursor &&
 914             (gui_grab || qemu_input_is_absolute() || absolute_enabled))
 915         SDL_SetCursor(guest_sprite);
 916 }
 917
 918 static void sdl_cleanup(void)
 919 {
 920     if (guest_sprite)
 921         SDL_FreeCursor(guest_sprite);
 922     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 923 }
 924
 925 static const DisplayChangeListenerOps dcl_ops = {
 926     .dpy_name             = "sdl",
 927     .dpy_gfx_update       = sdl_update,
 928     .dpy_gfx_switch       = sdl_switch,
 929     .dpy_gfx_check_format = sdl_check_format,
 930     .dpy_refresh          = sdl_refresh,
 931     .dpy_mouse_set        = sdl_mouse_warp,
 932     .dpy_cursor_define    = sdl_mouse_define,
 933 };
 934
 935 void sdl_display_early_init(int opengl)
 936 {
 937     if (opengl == 1 /* on */) {
 938         fprintf(stderr,
 939                 "SDL1 display code has no opengl support.\n"
 940                 "Please recompile qemu with SDL2, using\n"
 941                 "./configure --enable-sdl --with-sdlabi=2.0\n");
 942     }
 943 }
 944
 945 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 946 {
 947     int flags;
 948     uint8_t data = 0;
 949     const SDL_VideoInfo *vi;
 950     char *filename;
 951
 952 #if defined(__APPLE__)
 953     /* always use generic keymaps */
 954     if (!keyboard_layout)
 955         keyboard_layout = "en-us";
 956 #endif
 957     if(keyboard_layout) {
 958         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 959         if (!kbd_layout)
 960             exit(1);
 961     }
 962
 963     if (no_frame)
 964         gui_noframe = 1;
 965
 966     if (!full_screen) {
 967         setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0);
 968     }
 969 #ifdef __linux__
 970     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 971      * accessible $DISPLAY to open X11 window.  This is often the case
 972      * when qemu is run using sudo.  But in this case, and when actually
 973      * run in X11 environment, SDL fights with X11 for the video card,
 974      * making current display unavailable, often until reboot.
 975      * So make x11 the default SDL video driver if this variable is unset.
 976      * This is a bit hackish but saves us from bigger problem.
 977      * Maybe it's a good idea to fix this in SDL instead.
 978      */
 979     setenv("SDL_VIDEODRIVER", "x11", 0);
 980 #endif
 981
 982     /* Enable normal up/down events for Caps-Lock and Num-Lock keys.
 983      * This requires SDL >= 1.2.14. */
 984     setenv("SDL_DISABLE_LOCK_KEYS", "1", 1);
 985
 986     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 987     if (SDL_Init (flags)) {
 988         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 989                 SDL_GetError());
 990         exit(1);
 991     }
 992     vi = SDL_GetVideoInfo();
 993     host_format = *(vi->vfmt);
 994
 995     /* Load a 32x32x4 image. White pixels are transparent. */
 996     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 997     if (filename) {
 998         SDL_Surface *image = SDL_LoadBMP(filename);
 999         if (image) {
1000             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
1001             SDL_SetColorKey(image, SDL_SRCCOLORKEY, colorkey);
1002             SDL_WM_SetIcon(image, NULL);
1003         }
1004         g_free(filename);
1005     }
1006
1007     if (full_screen) {
1008         gui_fullscreen = 1;
1009         sdl_grab_start();
1010     }
1011
1012     dcl = g_new0(DisplayChangeListener, 1);
1013     dcl->ops = &dcl_ops;
1014     register_displaychangelistener(dcl);
1015
1016     mouse_mode_notifier.notify = sdl_mouse_mode_change;
1017     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
1018
1019     sdl_update_caption();
1020     SDL_EnableKeyRepeat(250, 50);
1021     gui_grab = 0;
1022
1023     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
1024     sdl_cursor_normal = SDL_GetCursor();
1025
1026     atexit(sdl_cleanup);
1027 }