ui/sdl2.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 /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
  25
  26 /* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
  27 #undef WIN32_LEAN_AND_MEAN
  28
  29 #include <SDL.h>
  30
  31 #if SDL_MAJOR_VERSION == 2
  32 #include <SDL_syswm.h>
  33
  34 #include "qemu-common.h"
  35 #include "ui/console.h"
  36 #include "ui/input.h"
  37 #include "sysemu/sysemu.h"
  38 #include "sdl_zoom.h"
  39
  40 #include "sdl2-keymap.h"
  41
  42 static int sdl2_num_outputs;
  43 static struct sdl2_state {
  44     DisplayChangeListener dcl;
  45     DisplaySurface *surface;
  46     SDL_Texture *texture;
  47     SDL_Window *real_window;
  48     SDL_Renderer *real_renderer;
  49     int idx;
  50     int last_vm_running; /* per console for caption reasons */
  51     int x, y;
  52 } *sdl2_console;
  53
  54 static SDL_Surface *guest_sprite_surface;
  55 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  56
  57 static bool gui_saved_scaling;
  58 static int gui_saved_width;
  59 static int gui_saved_height;
  60 static int gui_saved_grab;
  61 static int gui_fullscreen;
  62 static int gui_noframe;
  63 static int gui_key_modifier_pressed;
  64 static int gui_keysym;
  65 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  66 static uint8_t modifiers_state[SDL_NUM_SCANCODES];
  67 static SDL_Cursor *sdl_cursor_normal;
  68 static SDL_Cursor *sdl_cursor_hidden;
  69 static int absolute_enabled;
  70 static int guest_cursor;
  71 static int guest_x, guest_y;
  72 static SDL_Cursor *guest_sprite;
  73 static int scaling_active;
  74 static Notifier mouse_mode_notifier;
  75
  76 static void sdl_update_caption(struct sdl2_state *scon);
  77
  78 static struct sdl2_state *get_scon_from_window(uint32_t window_id)
  79 {
  80     int i;
  81     for (i = 0; i < sdl2_num_outputs; i++) {
  82         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  83             return &sdl2_console[i];
  84         }
  85     }
  86     return NULL;
  87 }
  88
  89 static void sdl_update(DisplayChangeListener *dcl,
  90                        int x, int y, int w, int h)
  91 {
  92     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
  93     SDL_Rect rect;
  94     DisplaySurface *surf = qemu_console_surface(dcl->con);
  95
  96     if (!surf) {
  97         return;
  98     }
  99     if (!scon->texture) {
 100         return;
 101     }
 102
 103     rect.x = x;
 104     rect.y = y;
 105     rect.w = w;
 106     rect.h = h;
 107
 108     SDL_UpdateTexture(scon->texture, NULL, surface_data(surf),
 109                       surface_stride(surf));
 110     SDL_RenderCopy(scon->real_renderer, scon->texture, &rect, &rect);
 111     SDL_RenderPresent(scon->real_renderer);
 112 }
 113
 114 static void do_sdl_resize(struct sdl2_state *scon, int width, int height,
 115                           int bpp)
 116 {
 117     int flags;
 118
 119     if (scon->real_window && scon->real_renderer) {
 120         if (width && height) {
 121             SDL_RenderSetLogicalSize(scon->real_renderer, width, height);
 122             SDL_SetWindowSize(scon->real_window, width, height);
 123         } else {
 124             SDL_DestroyRenderer(scon->real_renderer);
 125             SDL_DestroyWindow(scon->real_window);
 126             scon->real_renderer = NULL;
 127             scon->real_window = NULL;
 128         }
 129     } else {
 130         if (!width || !height) {
 131             return;
 132         }
 133         flags = 0;
 134         if (gui_fullscreen) {
 135             flags |= SDL_WINDOW_FULLSCREEN;
 136         } else {
 137             flags |= SDL_WINDOW_RESIZABLE;
 138         }
 139
 140         scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
 141                                              SDL_WINDOWPOS_UNDEFINED,
 142                                              width, height, flags);
 143         scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
 144         sdl_update_caption(scon);
 145     }
 146 }
 147
 148 static void sdl_switch(DisplayChangeListener *dcl,
 149                        DisplaySurface *new_surface)
 150 {
 151     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 152     int format = 0;
 153     int idx = scon->idx;
 154     DisplaySurface *old_surface = scon->surface;
 155
 156     /* temporary hack: allows to call sdl_switch to handle scaling changes */
 157     if (new_surface) {
 158         scon->surface = new_surface;
 159     }
 160
 161     if (!new_surface && idx > 0) {
 162         scon->surface = NULL;
 163     }
 164
 165     if (new_surface == NULL) {
 166         do_sdl_resize(scon, 0, 0, 0);
 167     } else {
 168         do_sdl_resize(scon, surface_width(scon->surface),
 169                       surface_height(scon->surface), 0);
 170     }
 171
 172     if (old_surface && scon->texture) {
 173         SDL_DestroyTexture(scon->texture);
 174         scon->texture = NULL;
 175     }
 176
 177     if (new_surface) {
 178         if (!scon->texture) {
 179             if (surface_bits_per_pixel(scon->surface) == 16) {
 180                 format = SDL_PIXELFORMAT_RGB565;
 181             } else if (surface_bits_per_pixel(scon->surface) == 32) {
 182                 format = SDL_PIXELFORMAT_ARGB8888;
 183             }
 184
 185             scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 186                                               SDL_TEXTUREACCESS_STREAMING,
 187                                               surface_width(new_surface),
 188                                               surface_height(new_surface));
 189         }
 190     }
 191 }
 192
 193 static void reset_keys(void)
 194 {
 195     int i;
 196
 197     for (i = 0; i < 256; i++) {
 198         if (modifiers_state[i]) {
 199             int qcode = sdl2_scancode_to_qcode[i];
 200             qemu_input_event_send_key_qcode(NULL, qcode, false);
 201             modifiers_state[i] = 0;
 202         }
 203     }
 204 }
 205
 206 static void sdl_process_key(SDL_KeyboardEvent *ev)
 207 {
 208     int qcode = sdl2_scancode_to_qcode[ev->keysym.scancode];
 209
 210     switch (ev->keysym.scancode) {
 211 #if 0
 212     case SDL_SCANCODE_NUMLOCKCLEAR:
 213     case SDL_SCANCODE_CAPSLOCK:
 214         /* SDL does not send the key up event, so we generate it */
 215         qemu_input_event_send_key_qcode(NULL, qcode, true);
 216         qemu_input_event_send_key_qcode(NULL, qcode, false);
 217         return;
 218 #endif
 219     case SDL_SCANCODE_LCTRL:
 220     case SDL_SCANCODE_LSHIFT:
 221     case SDL_SCANCODE_LALT:
 222     case SDL_SCANCODE_LGUI:
 223     case SDL_SCANCODE_RCTRL:
 224     case SDL_SCANCODE_RSHIFT:
 225     case SDL_SCANCODE_RALT:
 226     case SDL_SCANCODE_RGUI:
 227         if (ev->type == SDL_KEYUP) {
 228             modifiers_state[ev->keysym.scancode] = 0;
 229         } else {
 230             modifiers_state[ev->keysym.scancode] = 1;
 231         }
 232         /* fall though */
 233     default:
 234         qemu_input_event_send_key_qcode(NULL, qcode,
 235                                         ev->type == SDL_KEYDOWN);
 236     }
 237 }
 238
 239 static void sdl_update_caption(struct sdl2_state *scon)
 240 {
 241     char win_title[1024];
 242     char icon_title[1024];
 243     const char *status = "";
 244
 245     if (!runstate_is_running()) {
 246         status = " [Stopped]";
 247     } else if (gui_grab) {
 248         if (alt_grab) {
 249             status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 250         } else if (ctrl_grab) {
 251             status = " - Press Right-Ctrl to exit mouse grab";
 252         } else {
 253             status = " - Press Ctrl-Alt to exit mouse grab";
 254         }
 255     }
 256
 257     if (qemu_name) {
 258         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 259                  scon->idx, status);
 260         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 261     } else {
 262         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 263         snprintf(icon_title, sizeof(icon_title), "QEMU");
 264     }
 265
 266     if (scon->real_window) {
 267         SDL_SetWindowTitle(scon->real_window, win_title);
 268     }
 269 }
 270
 271 static void sdl_hide_cursor(void)
 272 {
 273     if (!cursor_hide) {
 274         return;
 275     }
 276
 277     if (qemu_input_is_absolute()) {
 278         SDL_ShowCursor(1);
 279         SDL_SetCursor(sdl_cursor_hidden);
 280     } else {
 281         SDL_SetRelativeMouseMode(SDL_TRUE);
 282     }
 283 }
 284
 285 static void sdl_show_cursor(void)
 286 {
 287     if (!cursor_hide) {
 288         return;
 289     }
 290
 291     if (!qemu_input_is_absolute()) {
 292         SDL_SetRelativeMouseMode(SDL_FALSE);
 293         SDL_ShowCursor(1);
 294         if (guest_cursor &&
 295             (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 296             SDL_SetCursor(guest_sprite);
 297         } else {
 298             SDL_SetCursor(sdl_cursor_normal);
 299         }
 300     }
 301 }
 302
 303 static void sdl_grab_start(struct sdl2_state *scon)
 304 {
 305     /*
 306      * If the application is not active, do not try to enter grab state. This
 307      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 308      * application (SDL bug).
 309      */
 310     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 311         return;
 312     }
 313     if (guest_cursor) {
 314         SDL_SetCursor(guest_sprite);
 315         if (!qemu_input_is_absolute() && !absolute_enabled) {
 316             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 317         }
 318     } else {
 319         sdl_hide_cursor();
 320     }
 321     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 322     gui_grab = 1;
 323     sdl_update_caption(scon);
 324 }
 325
 326 static void sdl_grab_end(struct sdl2_state *scon)
 327 {
 328     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 329     gui_grab = 0;
 330     sdl_show_cursor();
 331     sdl_update_caption(scon);
 332 }
 333
 334 static void absolute_mouse_grab(struct sdl2_state *scon)
 335 {
 336     int mouse_x, mouse_y;
 337     int scr_w, scr_h;
 338     SDL_GetMouseState(&mouse_x, &mouse_y);
 339     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 340     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 341         mouse_y > 0 && mouse_y < scr_h - 1) {
 342         sdl_grab_start(scon);
 343     }
 344 }
 345
 346 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 347 {
 348     if (qemu_input_is_absolute()) {
 349         if (!absolute_enabled) {
 350             absolute_enabled = 1;
 351             absolute_mouse_grab(&sdl2_console[0]);
 352         }
 353     } else if (absolute_enabled) {
 354         if (!gui_fullscreen) {
 355             sdl_grab_end(&sdl2_console[0]);
 356         }
 357         absolute_enabled = 0;
 358     }
 359 }
 360
 361 static void sdl_send_mouse_event(struct sdl2_state *scon, int dx, int dy,
 362                                  int dz, int x, int y, int state)
 363 {
 364     static uint32_t bmap[INPUT_BUTTON_MAX] = {
 365         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 366         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 367         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 368 #if 0
 369         [INPUT_BUTTON_WHEEL_UP]   = SDL_BUTTON(SDL_BUTTON_WHEELUP),
 370         [INPUT_BUTTON_WHEEL_DOWN] = SDL_BUTTON(SDL_BUTTON_WHEELDOWN),
 371 #endif
 372     };
 373     static uint32_t prev_state;
 374
 375     if (prev_state != state) {
 376         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 377         prev_state = state;
 378     }
 379
 380     if (qemu_input_is_absolute()) {
 381         int scr_w, scr_h;
 382         int max_w = 0, max_h = 0;
 383         int off_x = 0, off_y = 0;
 384         int cur_off_x = 0, cur_off_y = 0;
 385         int i;
 386
 387         for (i = 0; i < sdl2_num_outputs; i++) {
 388             struct sdl2_state *thiscon = &sdl2_console[i];
 389             if (thiscon->real_window && thiscon->surface) {
 390                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 391                 cur_off_x = thiscon->x;
 392                 cur_off_y = thiscon->y;
 393                 if (scr_w + cur_off_x > max_w) {
 394                     max_w = scr_w + cur_off_x;
 395                 }
 396                 if (scr_h + cur_off_y > max_h) {
 397                     max_h = scr_h + cur_off_y;
 398                 }
 399                 if (i == scon->idx) {
 400                     off_x = cur_off_x;
 401                     off_y = cur_off_y;
 402                 }
 403             }
 404         }
 405         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 406         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 407     } else {
 408         if (guest_cursor) {
 409             x -= guest_x;
 410             y -= guest_y;
 411             guest_x += x;
 412             guest_y += y;
 413             dx = x;
 414             dy = y;
 415         }
 416         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 417         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 418     }
 419     qemu_input_event_sync();
 420 }
 421
 422 static void sdl_scale(struct sdl2_state *scon, int width, int height)
 423 {
 424     int bpp = 0;
 425     do_sdl_resize(scon, width, height, bpp);
 426     scaling_active = 1;
 427 }
 428
 429 static void toggle_full_screen(struct sdl2_state *scon)
 430 {
 431     int width = surface_width(scon->surface);
 432     int height = surface_height(scon->surface);
 433     int bpp = surface_bits_per_pixel(scon->surface);
 434
 435     gui_fullscreen = !gui_fullscreen;
 436     if (gui_fullscreen) {
 437         SDL_GetWindowSize(scon->real_window,
 438                           &gui_saved_width, &gui_saved_height);
 439         gui_saved_scaling = scaling_active;
 440
 441         do_sdl_resize(scon, width, height, bpp);
 442         scaling_active = 0;
 443
 444         gui_saved_grab = gui_grab;
 445         sdl_grab_start(scon);
 446     } else {
 447         if (gui_saved_scaling) {
 448             sdl_scale(scon, gui_saved_width, gui_saved_height);
 449         } else {
 450             do_sdl_resize(scon, width, height, 0);
 451         }
 452         if (!gui_saved_grab) {
 453             sdl_grab_end(scon);
 454         }
 455     }
 456     graphic_hw_invalidate(scon->dcl.con);
 457     graphic_hw_update(scon->dcl.con);
 458 }
 459
 460 static void handle_keydown(SDL_Event *ev)
 461 {
 462     int mod_state;
 463     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 464
 465     if (alt_grab) {
 466         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 467             (gui_grab_code | KMOD_LSHIFT);
 468     } else if (ctrl_grab) {
 469         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 470     } else {
 471         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 472     }
 473     gui_key_modifier_pressed = mod_state;
 474
 475     if (gui_key_modifier_pressed) {
 476         switch (ev->key.keysym.scancode) {
 477         case SDL_SCANCODE_F:
 478             toggle_full_screen(scon);
 479             gui_keysym = 1;
 480             break;
 481         case SDL_SCANCODE_U:
 482             if (scaling_active) {
 483                 scaling_active = 0;
 484                 sdl_switch(&scon->dcl, NULL);
 485                 graphic_hw_invalidate(scon->dcl.con);
 486                 graphic_hw_update(scon->dcl.con);
 487             }
 488             gui_keysym = 1;
 489             break;
 490         case SDL_SCANCODE_KP_PLUS:
 491         case SDL_SCANCODE_KP_MINUS:
 492             if (!gui_fullscreen) {
 493                 int scr_w, scr_h;
 494                 int width, height;
 495                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 496
 497                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 498                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 499                             160);
 500                 height = (surface_height(scon->surface) * width) /
 501                     surface_width(scon->surface);
 502
 503                 sdl_scale(scon, width, height);
 504                 graphic_hw_invalidate(NULL);
 505                 graphic_hw_update(NULL);
 506                 gui_keysym = 1;
 507             }
 508         default:
 509             break;
 510         }
 511     }
 512     if (!gui_keysym) {
 513         sdl_process_key(&ev->key);
 514     }
 515 }
 516
 517 static void handle_keyup(SDL_Event *ev)
 518 {
 519     int mod_state;
 520     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 521
 522     if (!alt_grab) {
 523         mod_state = (ev->key.keysym.mod & gui_grab_code);
 524     } else {
 525         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 526     }
 527     if (!mod_state && gui_key_modifier_pressed) {
 528         gui_key_modifier_pressed = 0;
 529         if (gui_keysym == 0) {
 530             /* exit/enter grab if pressing Ctrl-Alt */
 531             if (!gui_grab) {
 532                 sdl_grab_start(scon);
 533             } else if (!gui_fullscreen) {
 534                 sdl_grab_end(scon);
 535             }
 536             /* SDL does not send back all the modifiers key, so we must
 537              * correct it. */
 538             reset_keys();
 539             return;
 540         }
 541         gui_keysym = 0;
 542     }
 543     if (!gui_keysym) {
 544         sdl_process_key(&ev->key);
 545     }
 546 }
 547
 548 static void handle_mousemotion(SDL_Event *ev)
 549 {
 550     int max_x, max_y;
 551     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 552
 553     if (qemu_input_is_absolute() || absolute_enabled) {
 554         int scr_w, scr_h;
 555         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 556         max_x = scr_w - 1;
 557         max_y = scr_h - 1;
 558         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 559                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 560             sdl_grab_end(scon);
 561         }
 562         if (!gui_grab &&
 563             (ev->motion.x > 0 && ev->motion.x < max_x &&
 564              ev->motion.y > 0 && ev->motion.y < max_y)) {
 565             sdl_grab_start(scon);
 566         }
 567     }
 568     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 569         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel, 0,
 570                              ev->motion.x, ev->motion.y, ev->motion.state);
 571     }
 572 }
 573
 574 static void handle_mousebutton(SDL_Event *ev)
 575 {
 576     int buttonstate = SDL_GetMouseState(NULL, NULL);
 577     SDL_MouseButtonEvent *bev;
 578     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 579     int dz;
 580
 581     bev = &ev->button;
 582     if (!gui_grab && !qemu_input_is_absolute()) {
 583         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 584             /* start grabbing all events */
 585             sdl_grab_start(scon);
 586         }
 587     } else {
 588         dz = 0;
 589         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 590             buttonstate |= SDL_BUTTON(bev->button);
 591         } else {
 592             buttonstate &= ~SDL_BUTTON(bev->button);
 593         }
 594 #ifdef SDL_BUTTON_WHEELUP
 595         if (bev->button == SDL_BUTTON_WHEELUP &&
 596             ev->type == SDL_MOUSEBUTTONDOWN) {
 597             dz = -1;
 598         } else if (bev->button == SDL_BUTTON_WHEELDOWN &&
 599                    ev->type == SDL_MOUSEBUTTONDOWN) {
 600             dz = 1;
 601         }
 602 #endif
 603         sdl_send_mouse_event(scon, 0, 0, dz, bev->x, bev->y, buttonstate);
 604     }
 605 }
 606
 607 static void handle_windowevent(DisplayChangeListener *dcl, SDL_Event *ev)
 608 {
 609     int w, h;
 610     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 611
 612     switch (ev->window.event) {
 613     case SDL_WINDOWEVENT_RESIZED:
 614         sdl_scale(scon, ev->window.data1, ev->window.data2);
 615         graphic_hw_invalidate(scon->dcl.con);
 616         graphic_hw_update(scon->dcl.con);
 617         break;
 618     case SDL_WINDOWEVENT_EXPOSED:
 619         SDL_GetWindowSize(SDL_GetWindowFromID(ev->window.windowID), &w, &h);
 620         sdl_update(dcl, 0, 0, w, h);
 621         break;
 622     case SDL_WINDOWEVENT_FOCUS_GAINED:
 623     case SDL_WINDOWEVENT_ENTER:
 624         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 625             absolute_mouse_grab(scon);
 626         }
 627         break;
 628     case SDL_WINDOWEVENT_FOCUS_LOST:
 629         if (gui_grab && !gui_fullscreen) {
 630             sdl_grab_end(scon);
 631         }
 632         break;
 633     case SDL_WINDOWEVENT_RESTORED:
 634         update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 635         break;
 636     case SDL_WINDOWEVENT_MINIMIZED:
 637         update_displaychangelistener(dcl, 500);
 638         break;
 639     case SDL_WINDOWEVENT_CLOSE:
 640         if (!no_quit) {
 641             no_shutdown = 0;
 642             qemu_system_shutdown_request();
 643         }
 644         break;
 645     }
 646 }
 647
 648 static void sdl_refresh(DisplayChangeListener *dcl)
 649 {
 650     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 651     SDL_Event ev1, *ev = &ev1;
 652
 653     if (scon->last_vm_running != runstate_is_running()) {
 654         scon->last_vm_running = runstate_is_running();
 655         sdl_update_caption(scon);
 656     }
 657
 658     graphic_hw_update(dcl->con);
 659
 660     while (SDL_PollEvent(ev)) {
 661         switch (ev->type) {
 662         case SDL_KEYDOWN:
 663             handle_keydown(ev);
 664             break;
 665         case SDL_KEYUP:
 666             handle_keyup(ev);
 667             break;
 668         case SDL_QUIT:
 669             if (!no_quit) {
 670                 no_shutdown = 0;
 671                 qemu_system_shutdown_request();
 672             }
 673             break;
 674         case SDL_MOUSEMOTION:
 675             handle_mousemotion(ev);
 676             break;
 677         case SDL_MOUSEBUTTONDOWN:
 678         case SDL_MOUSEBUTTONUP:
 679             handle_mousebutton(ev);
 680             break;
 681         case SDL_WINDOWEVENT:
 682             handle_windowevent(dcl, ev);
 683             break;
 684         default:
 685             break;
 686         }
 687     }
 688 }
 689
 690 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 691                            int x, int y, int on)
 692 {
 693     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 694     if (on) {
 695         if (!guest_cursor) {
 696             sdl_show_cursor();
 697         }
 698         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 699             SDL_SetCursor(guest_sprite);
 700             if (!qemu_input_is_absolute() && !absolute_enabled) {
 701                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 702             }
 703         }
 704     } else if (gui_grab) {
 705         sdl_hide_cursor();
 706     }
 707     guest_cursor = on;
 708     guest_x = x, guest_y = y;
 709 }
 710
 711 static void sdl_mouse_define(DisplayChangeListener *dcl,
 712                              QEMUCursor *c)
 713 {
 714
 715     if (guest_sprite) {
 716         SDL_FreeCursor(guest_sprite);
 717     }
 718
 719     if (guest_sprite_surface) {
 720         SDL_FreeSurface(guest_sprite_surface);
 721     }
 722
 723     guest_sprite_surface =
 724         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 725                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 726
 727     if (!guest_sprite_surface) {
 728         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 729         return;
 730     }
 731     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 732                                          c->hot_x, c->hot_y);
 733     if (!guest_sprite) {
 734         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 735         return;
 736     }
 737     if (guest_cursor &&
 738         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 739         SDL_SetCursor(guest_sprite);
 740     }
 741 }
 742
 743 static void sdl_cleanup(void)
 744 {
 745     if (guest_sprite) {
 746         SDL_FreeCursor(guest_sprite);
 747     }
 748     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 749 }
 750
 751 static const DisplayChangeListenerOps dcl_ops = {
 752     .dpy_name          = "sdl",
 753     .dpy_gfx_update    = sdl_update,
 754     .dpy_gfx_switch    = sdl_switch,
 755     .dpy_refresh       = sdl_refresh,
 756     .dpy_mouse_set     = sdl_mouse_warp,
 757     .dpy_cursor_define = sdl_mouse_define,
 758 };
 759
 760 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 761 {
 762     int flags;
 763     uint8_t data = 0;
 764     char *filename;
 765     int i;
 766
 767     if (no_frame) {
 768         gui_noframe = 1;
 769     }
 770
 771 #ifdef __linux__
 772     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 773      * accessible $DISPLAY to open X11 window.  This is often the case
 774      * when qemu is run using sudo.  But in this case, and when actually
 775      * run in X11 environment, SDL fights with X11 for the video card,
 776      * making current display unavailable, often until reboot.
 777      * So make x11 the default SDL video driver if this variable is unset.
 778      * This is a bit hackish but saves us from bigger problem.
 779      * Maybe it's a good idea to fix this in SDL instead.
 780      */
 781     setenv("SDL_VIDEODRIVER", "x11", 0);
 782 #endif
 783
 784     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 785     if (SDL_Init(flags)) {
 786         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 787                 SDL_GetError());
 788         exit(1);
 789     }
 790
 791     for (i = 0;; i++) {
 792         QemuConsole *con = qemu_console_lookup_by_index(i);
 793         if (!con || !qemu_console_is_graphic(con)) {
 794             break;
 795         }
 796     }
 797     sdl2_num_outputs = i;
 798     sdl2_console = g_new0(struct sdl2_state, sdl2_num_outputs);
 799     for (i = 0; i < sdl2_num_outputs; i++) {
 800         QemuConsole *con = qemu_console_lookup_by_index(i);
 801         sdl2_console[i].dcl.ops = &dcl_ops;
 802         sdl2_console[i].dcl.con = con;
 803         register_displaychangelistener(&sdl2_console[i].dcl);
 804         sdl2_console[i].idx = i;
 805     }
 806
 807     /* Load a 32x32x4 image. White pixels are transparent. */
 808     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 809     if (filename) {
 810         SDL_Surface *image = SDL_LoadBMP(filename);
 811         if (image) {
 812             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 813             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 814             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 815         }
 816         g_free(filename);
 817     }
 818
 819     if (full_screen) {
 820         gui_fullscreen = 1;
 821         sdl_grab_start(0);
 822     }
 823
 824     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 825     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 826
 827     gui_grab = 0;
 828
 829     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 830     sdl_cursor_normal = SDL_GetCursor();
 831
 832     atexit(sdl_cleanup);
 833 }
 834 #endif