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     int hidden;
  53 } *sdl2_console;
  54
  55 static SDL_Surface *guest_sprite_surface;
  56 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  57
  58 static bool gui_saved_scaling;
  59 static int gui_saved_width;
  60 static int gui_saved_height;
  61 static int gui_saved_grab;
  62 static int gui_fullscreen;
  63 static int gui_noframe;
  64 static int gui_key_modifier_pressed;
  65 static int gui_keysym;
  66 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  67 static uint8_t modifiers_state[SDL_NUM_SCANCODES];
  68 static SDL_Cursor *sdl_cursor_normal;
  69 static SDL_Cursor *sdl_cursor_hidden;
  70 static int absolute_enabled;
  71 static int guest_cursor;
  72 static int guest_x, guest_y;
  73 static SDL_Cursor *guest_sprite;
  74 static int scaling_active;
  75 static Notifier mouse_mode_notifier;
  76
  77 static void sdl_update_caption(struct sdl2_state *scon);
  78
  79 static struct sdl2_state *get_scon_from_window(uint32_t window_id)
  80 {
  81     int i;
  82     for (i = 0; i < sdl2_num_outputs; i++) {
  83         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  84             return &sdl2_console[i];
  85         }
  86     }
  87     return NULL;
  88 }
  89
  90 static void sdl_update(DisplayChangeListener *dcl,
  91                        int x, int y, int w, int h)
  92 {
  93     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
  94     SDL_Rect rect;
  95     DisplaySurface *surf = qemu_console_surface(dcl->con);
  96
  97     if (!surf) {
  98         return;
  99     }
 100     if (!scon->texture) {
 101         return;
 102     }
 103
 104     rect.x = x;
 105     rect.y = y;
 106     rect.w = w;
 107     rect.h = h;
 108
 109     SDL_UpdateTexture(scon->texture, NULL, surface_data(surf),
 110                       surface_stride(surf));
 111     SDL_RenderCopy(scon->real_renderer, scon->texture, &rect, &rect);
 112     SDL_RenderPresent(scon->real_renderer);
 113 }
 114
 115 static void do_sdl_resize(struct sdl2_state *scon, int width, int height,
 116                           int bpp)
 117 {
 118     int flags;
 119
 120     if (scon->real_window && scon->real_renderer) {
 121         if (width && height) {
 122             SDL_RenderSetLogicalSize(scon->real_renderer, width, height);
 123             SDL_SetWindowSize(scon->real_window, width, height);
 124         } else {
 125             SDL_DestroyRenderer(scon->real_renderer);
 126             SDL_DestroyWindow(scon->real_window);
 127             scon->real_renderer = NULL;
 128             scon->real_window = NULL;
 129         }
 130     } else {
 131         if (!width || !height) {
 132             return;
 133         }
 134         flags = 0;
 135         if (gui_fullscreen) {
 136             flags |= SDL_WINDOW_FULLSCREEN;
 137         } else {
 138             flags |= SDL_WINDOW_RESIZABLE;
 139         }
 140         if (scon->hidden) {
 141             flags |= SDL_WINDOW_HIDDEN;
 142         }
 143
 144         scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
 145                                              SDL_WINDOWPOS_UNDEFINED,
 146                                              width, height, flags);
 147         scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
 148         sdl_update_caption(scon);
 149     }
 150 }
 151
 152 static void sdl_switch(DisplayChangeListener *dcl,
 153                        DisplaySurface *new_surface)
 154 {
 155     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 156     int format = 0;
 157     int idx = scon->idx;
 158     DisplaySurface *old_surface = scon->surface;
 159
 160     /* temporary hack: allows to call sdl_switch to handle scaling changes */
 161     if (new_surface) {
 162         scon->surface = new_surface;
 163     }
 164
 165     if (!new_surface && idx > 0) {
 166         scon->surface = NULL;
 167     }
 168
 169     if (new_surface == NULL) {
 170         do_sdl_resize(scon, 0, 0, 0);
 171     } else {
 172         do_sdl_resize(scon, surface_width(scon->surface),
 173                       surface_height(scon->surface), 0);
 174     }
 175
 176     if (old_surface && scon->texture) {
 177         SDL_DestroyTexture(scon->texture);
 178         scon->texture = NULL;
 179     }
 180
 181     if (new_surface) {
 182         if (!scon->texture) {
 183             if (surface_bits_per_pixel(scon->surface) == 16) {
 184                 format = SDL_PIXELFORMAT_RGB565;
 185             } else if (surface_bits_per_pixel(scon->surface) == 32) {
 186                 format = SDL_PIXELFORMAT_ARGB8888;
 187             }
 188
 189             scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 190                                               SDL_TEXTUREACCESS_STREAMING,
 191                                               surface_width(new_surface),
 192                                               surface_height(new_surface));
 193         }
 194     }
 195 }
 196
 197 static void reset_keys(struct sdl2_state *scon)
 198 {
 199     QemuConsole *con = scon ? scon->dcl.con : NULL;
 200     int i;
 201
 202     for (i = 0; i < 256; i++) {
 203         if (modifiers_state[i]) {
 204             int qcode = sdl2_scancode_to_qcode[i];
 205             qemu_input_event_send_key_qcode(con, qcode, false);
 206             modifiers_state[i] = 0;
 207         }
 208     }
 209 }
 210
 211 static void sdl_process_key(struct sdl2_state *scon,
 212                             SDL_KeyboardEvent *ev)
 213 {
 214     int qcode = sdl2_scancode_to_qcode[ev->keysym.scancode];
 215     QemuConsole *con = scon ? scon->dcl.con : NULL;
 216
 217     if (!qemu_console_is_graphic(con)) {
 218         if (ev->type == SDL_KEYDOWN) {
 219             switch (ev->keysym.scancode) {
 220             case SDL_SCANCODE_RETURN:
 221                 kbd_put_keysym_console(con, '\n');
 222                 break;
 223             case SDL_SCANCODE_BACKSPACE:
 224                 kbd_put_keysym_console(con, QEMU_KEY_BACKSPACE);
 225                 break;
 226             default:
 227                 kbd_put_qcode_console(con, qcode);
 228                 break;
 229             }
 230         }
 231         return;
 232     }
 233
 234     switch (ev->keysym.scancode) {
 235 #if 0
 236     case SDL_SCANCODE_NUMLOCKCLEAR:
 237     case SDL_SCANCODE_CAPSLOCK:
 238         /* SDL does not send the key up event, so we generate it */
 239         qemu_input_event_send_key_qcode(con, qcode, true);
 240         qemu_input_event_send_key_qcode(con, qcode, false);
 241         return;
 242 #endif
 243     case SDL_SCANCODE_LCTRL:
 244     case SDL_SCANCODE_LSHIFT:
 245     case SDL_SCANCODE_LALT:
 246     case SDL_SCANCODE_LGUI:
 247     case SDL_SCANCODE_RCTRL:
 248     case SDL_SCANCODE_RSHIFT:
 249     case SDL_SCANCODE_RALT:
 250     case SDL_SCANCODE_RGUI:
 251         if (ev->type == SDL_KEYUP) {
 252             modifiers_state[ev->keysym.scancode] = 0;
 253         } else {
 254             modifiers_state[ev->keysym.scancode] = 1;
 255         }
 256         /* fall though */
 257     default:
 258         qemu_input_event_send_key_qcode(con, qcode,
 259                                         ev->type == SDL_KEYDOWN);
 260     }
 261 }
 262
 263 static void sdl_update_caption(struct sdl2_state *scon)
 264 {
 265     char win_title[1024];
 266     char icon_title[1024];
 267     const char *status = "";
 268
 269     if (!runstate_is_running()) {
 270         status = " [Stopped]";
 271     } else if (gui_grab) {
 272         if (alt_grab) {
 273             status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 274         } else if (ctrl_grab) {
 275             status = " - Press Right-Ctrl to exit mouse grab";
 276         } else {
 277             status = " - Press Ctrl-Alt to exit mouse grab";
 278         }
 279     }
 280
 281     if (qemu_name) {
 282         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 283                  scon->idx, status);
 284         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 285     } else {
 286         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 287         snprintf(icon_title, sizeof(icon_title), "QEMU");
 288     }
 289
 290     if (scon->real_window) {
 291         SDL_SetWindowTitle(scon->real_window, win_title);
 292     }
 293 }
 294
 295 static void sdl_hide_cursor(void)
 296 {
 297     if (!cursor_hide) {
 298         return;
 299     }
 300
 301     if (qemu_input_is_absolute()) {
 302         SDL_ShowCursor(1);
 303         SDL_SetCursor(sdl_cursor_hidden);
 304     } else {
 305         SDL_SetRelativeMouseMode(SDL_TRUE);
 306     }
 307 }
 308
 309 static void sdl_show_cursor(void)
 310 {
 311     if (!cursor_hide) {
 312         return;
 313     }
 314
 315     if (!qemu_input_is_absolute()) {
 316         SDL_SetRelativeMouseMode(SDL_FALSE);
 317         SDL_ShowCursor(1);
 318         if (guest_cursor &&
 319             (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 320             SDL_SetCursor(guest_sprite);
 321         } else {
 322             SDL_SetCursor(sdl_cursor_normal);
 323         }
 324     }
 325 }
 326
 327 static void sdl_grab_start(struct sdl2_state *scon)
 328 {
 329     QemuConsole *con = scon ? scon->dcl.con : NULL;
 330
 331     if (!con || !qemu_console_is_graphic(con)) {
 332         return;
 333     }
 334     /*
 335      * If the application is not active, do not try to enter grab state. This
 336      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 337      * application (SDL bug).
 338      */
 339     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 340         return;
 341     }
 342     if (guest_cursor) {
 343         SDL_SetCursor(guest_sprite);
 344         if (!qemu_input_is_absolute() && !absolute_enabled) {
 345             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 346         }
 347     } else {
 348         sdl_hide_cursor();
 349     }
 350     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 351     gui_grab = 1;
 352     sdl_update_caption(scon);
 353 }
 354
 355 static void sdl_grab_end(struct sdl2_state *scon)
 356 {
 357     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 358     gui_grab = 0;
 359     sdl_show_cursor();
 360     sdl_update_caption(scon);
 361 }
 362
 363 static void absolute_mouse_grab(struct sdl2_state *scon)
 364 {
 365     int mouse_x, mouse_y;
 366     int scr_w, scr_h;
 367     SDL_GetMouseState(&mouse_x, &mouse_y);
 368     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 369     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 370         mouse_y > 0 && mouse_y < scr_h - 1) {
 371         sdl_grab_start(scon);
 372     }
 373 }
 374
 375 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 376 {
 377     if (qemu_input_is_absolute()) {
 378         if (!absolute_enabled) {
 379             absolute_enabled = 1;
 380             absolute_mouse_grab(&sdl2_console[0]);
 381         }
 382     } else if (absolute_enabled) {
 383         if (!gui_fullscreen) {
 384             sdl_grab_end(&sdl2_console[0]);
 385         }
 386         absolute_enabled = 0;
 387     }
 388 }
 389
 390 static void sdl_send_mouse_event(struct sdl2_state *scon, int dx, int dy,
 391                                  int x, int y, int state)
 392 {
 393     static uint32_t bmap[INPUT_BUTTON_MAX] = {
 394         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 395         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 396         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 397     };
 398     static uint32_t prev_state;
 399
 400     if (prev_state != state) {
 401         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 402         prev_state = state;
 403     }
 404
 405     if (qemu_input_is_absolute()) {
 406         int scr_w, scr_h;
 407         int max_w = 0, max_h = 0;
 408         int off_x = 0, off_y = 0;
 409         int cur_off_x = 0, cur_off_y = 0;
 410         int i;
 411
 412         for (i = 0; i < sdl2_num_outputs; i++) {
 413             struct sdl2_state *thiscon = &sdl2_console[i];
 414             if (thiscon->real_window && thiscon->surface) {
 415                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 416                 cur_off_x = thiscon->x;
 417                 cur_off_y = thiscon->y;
 418                 if (scr_w + cur_off_x > max_w) {
 419                     max_w = scr_w + cur_off_x;
 420                 }
 421                 if (scr_h + cur_off_y > max_h) {
 422                     max_h = scr_h + cur_off_y;
 423                 }
 424                 if (i == scon->idx) {
 425                     off_x = cur_off_x;
 426                     off_y = cur_off_y;
 427                 }
 428             }
 429         }
 430         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 431         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 432     } else {
 433         if (guest_cursor) {
 434             x -= guest_x;
 435             y -= guest_y;
 436             guest_x += x;
 437             guest_y += y;
 438             dx = x;
 439             dy = y;
 440         }
 441         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 442         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 443     }
 444     qemu_input_event_sync();
 445 }
 446
 447 static void sdl_scale(struct sdl2_state *scon, int width, int height)
 448 {
 449     int bpp = 0;
 450     do_sdl_resize(scon, width, height, bpp);
 451     scaling_active = 1;
 452 }
 453
 454 static void toggle_full_screen(struct sdl2_state *scon)
 455 {
 456     int width = surface_width(scon->surface);
 457     int height = surface_height(scon->surface);
 458     int bpp = surface_bits_per_pixel(scon->surface);
 459
 460     gui_fullscreen = !gui_fullscreen;
 461     if (gui_fullscreen) {
 462         SDL_GetWindowSize(scon->real_window,
 463                           &gui_saved_width, &gui_saved_height);
 464         gui_saved_scaling = scaling_active;
 465
 466         do_sdl_resize(scon, width, height, bpp);
 467         scaling_active = 0;
 468
 469         gui_saved_grab = gui_grab;
 470         sdl_grab_start(scon);
 471     } else {
 472         if (gui_saved_scaling) {
 473             sdl_scale(scon, gui_saved_width, gui_saved_height);
 474         } else {
 475             do_sdl_resize(scon, width, height, 0);
 476         }
 477         if (!gui_saved_grab) {
 478             sdl_grab_end(scon);
 479         }
 480     }
 481     graphic_hw_invalidate(scon->dcl.con);
 482     graphic_hw_update(scon->dcl.con);
 483 }
 484
 485 static void handle_keydown(SDL_Event *ev)
 486 {
 487     int mod_state, win;
 488     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 489
 490     if (alt_grab) {
 491         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 492             (gui_grab_code | KMOD_LSHIFT);
 493     } else if (ctrl_grab) {
 494         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 495     } else {
 496         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 497     }
 498     gui_key_modifier_pressed = mod_state;
 499
 500     if (gui_key_modifier_pressed) {
 501         switch (ev->key.keysym.scancode) {
 502         case SDL_SCANCODE_2:
 503         case SDL_SCANCODE_3:
 504         case SDL_SCANCODE_4:
 505         case SDL_SCANCODE_5:
 506         case SDL_SCANCODE_6:
 507         case SDL_SCANCODE_7:
 508         case SDL_SCANCODE_8:
 509         case SDL_SCANCODE_9:
 510             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 511             if (win < sdl2_num_outputs) {
 512                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 513                 if (sdl2_console[win].real_window) {
 514                     if (sdl2_console[win].hidden) {
 515                         SDL_HideWindow(sdl2_console[win].real_window);
 516                     } else {
 517                         SDL_ShowWindow(sdl2_console[win].real_window);
 518                     }
 519                 }
 520                 gui_keysym = 1;
 521             }
 522             break;
 523         case SDL_SCANCODE_F:
 524             toggle_full_screen(scon);
 525             gui_keysym = 1;
 526             break;
 527         case SDL_SCANCODE_U:
 528             if (scaling_active) {
 529                 scaling_active = 0;
 530                 sdl_switch(&scon->dcl, NULL);
 531                 graphic_hw_invalidate(scon->dcl.con);
 532                 graphic_hw_update(scon->dcl.con);
 533             }
 534             gui_keysym = 1;
 535             break;
 536         case SDL_SCANCODE_KP_PLUS:
 537         case SDL_SCANCODE_KP_MINUS:
 538             if (!gui_fullscreen) {
 539                 int scr_w, scr_h;
 540                 int width, height;
 541                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 542
 543                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 544                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 545                             160);
 546                 height = (surface_height(scon->surface) * width) /
 547                     surface_width(scon->surface);
 548
 549                 sdl_scale(scon, width, height);
 550                 graphic_hw_invalidate(NULL);
 551                 graphic_hw_update(NULL);
 552                 gui_keysym = 1;
 553             }
 554         default:
 555             break;
 556         }
 557     }
 558     if (!gui_keysym) {
 559         sdl_process_key(scon, &ev->key);
 560     }
 561 }
 562
 563 static void handle_keyup(SDL_Event *ev)
 564 {
 565     int mod_state;
 566     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 567
 568     if (!alt_grab) {
 569         mod_state = (ev->key.keysym.mod & gui_grab_code);
 570     } else {
 571         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 572     }
 573     if (!mod_state && gui_key_modifier_pressed) {
 574         gui_key_modifier_pressed = 0;
 575         if (gui_keysym == 0) {
 576             /* exit/enter grab if pressing Ctrl-Alt */
 577             if (!gui_grab) {
 578                 sdl_grab_start(scon);
 579             } else if (!gui_fullscreen) {
 580                 sdl_grab_end(scon);
 581             }
 582             /* SDL does not send back all the modifiers key, so we must
 583              * correct it. */
 584             reset_keys(scon);
 585             return;
 586         }
 587         gui_keysym = 0;
 588     }
 589     if (!gui_keysym) {
 590         sdl_process_key(scon, &ev->key);
 591     }
 592 }
 593
 594 static void handle_textinput(SDL_Event *ev)
 595 {
 596     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 597     QemuConsole *con = scon ? scon->dcl.con : NULL;
 598
 599     if (qemu_console_is_graphic(con)) {
 600         return;
 601     }
 602     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 603 }
 604
 605 static void handle_mousemotion(SDL_Event *ev)
 606 {
 607     int max_x, max_y;
 608     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 609
 610     if (qemu_input_is_absolute() || absolute_enabled) {
 611         int scr_w, scr_h;
 612         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 613         max_x = scr_w - 1;
 614         max_y = scr_h - 1;
 615         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 616                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 617             sdl_grab_end(scon);
 618         }
 619         if (!gui_grab &&
 620             (ev->motion.x > 0 && ev->motion.x < max_x &&
 621              ev->motion.y > 0 && ev->motion.y < max_y)) {
 622             sdl_grab_start(scon);
 623         }
 624     }
 625     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 626         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 627                              ev->motion.x, ev->motion.y, ev->motion.state);
 628     }
 629 }
 630
 631 static void handle_mousebutton(SDL_Event *ev)
 632 {
 633     int buttonstate = SDL_GetMouseState(NULL, NULL);
 634     SDL_MouseButtonEvent *bev;
 635     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 636
 637     bev = &ev->button;
 638     if (!gui_grab && !qemu_input_is_absolute()) {
 639         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 640             /* start grabbing all events */
 641             sdl_grab_start(scon);
 642         }
 643     } else {
 644         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 645             buttonstate |= SDL_BUTTON(bev->button);
 646         } else {
 647             buttonstate &= ~SDL_BUTTON(bev->button);
 648         }
 649         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 650     }
 651 }
 652
 653 static void handle_mousewheel(SDL_Event *ev)
 654 {
 655     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 656     SDL_MouseWheelEvent *wev = &ev->wheel;
 657     InputButton btn;
 658
 659     if (wev->y > 0) {
 660         btn = INPUT_BUTTON_WHEEL_UP;
 661     } else if (wev->y < 0) {
 662         btn = INPUT_BUTTON_WHEEL_DOWN;
 663     } else {
 664         return;
 665     }
 666
 667     qemu_input_queue_btn(scon->dcl.con, btn, true);
 668     qemu_input_event_sync();
 669     qemu_input_queue_btn(scon->dcl.con, btn, false);
 670     qemu_input_event_sync();
 671 }
 672
 673 static void handle_windowevent(DisplayChangeListener *dcl, SDL_Event *ev)
 674 {
 675     int w, h;
 676     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 677
 678     switch (ev->window.event) {
 679     case SDL_WINDOWEVENT_RESIZED:
 680         sdl_scale(scon, ev->window.data1, ev->window.data2);
 681         {
 682             QemuUIInfo info;
 683             memset(&info, 0, sizeof(info));
 684             info.width = ev->window.data1;
 685             info.height = ev->window.data2;
 686             dpy_set_ui_info(scon->dcl.con, &info);
 687         }
 688         graphic_hw_invalidate(scon->dcl.con);
 689         graphic_hw_update(scon->dcl.con);
 690         break;
 691     case SDL_WINDOWEVENT_EXPOSED:
 692         SDL_GetWindowSize(SDL_GetWindowFromID(ev->window.windowID), &w, &h);
 693         sdl_update(dcl, 0, 0, w, h);
 694         break;
 695     case SDL_WINDOWEVENT_FOCUS_GAINED:
 696     case SDL_WINDOWEVENT_ENTER:
 697         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 698             absolute_mouse_grab(scon);
 699         }
 700         break;
 701     case SDL_WINDOWEVENT_FOCUS_LOST:
 702         if (gui_grab && !gui_fullscreen) {
 703             sdl_grab_end(scon);
 704         }
 705         break;
 706     case SDL_WINDOWEVENT_RESTORED:
 707         update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 708         break;
 709     case SDL_WINDOWEVENT_MINIMIZED:
 710         update_displaychangelistener(dcl, 500);
 711         break;
 712     case SDL_WINDOWEVENT_CLOSE:
 713         if (!no_quit) {
 714             no_shutdown = 0;
 715             qemu_system_shutdown_request();
 716         }
 717         break;
 718     }
 719 }
 720
 721 static void sdl_refresh(DisplayChangeListener *dcl)
 722 {
 723     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 724     SDL_Event ev1, *ev = &ev1;
 725
 726     if (scon->last_vm_running != runstate_is_running()) {
 727         scon->last_vm_running = runstate_is_running();
 728         sdl_update_caption(scon);
 729     }
 730
 731     graphic_hw_update(dcl->con);
 732
 733     while (SDL_PollEvent(ev)) {
 734         switch (ev->type) {
 735         case SDL_KEYDOWN:
 736             handle_keydown(ev);
 737             break;
 738         case SDL_KEYUP:
 739             handle_keyup(ev);
 740             break;
 741         case SDL_TEXTINPUT:
 742             handle_textinput(ev);
 743             break;
 744         case SDL_QUIT:
 745             if (!no_quit) {
 746                 no_shutdown = 0;
 747                 qemu_system_shutdown_request();
 748             }
 749             break;
 750         case SDL_MOUSEMOTION:
 751             handle_mousemotion(ev);
 752             break;
 753         case SDL_MOUSEBUTTONDOWN:
 754         case SDL_MOUSEBUTTONUP:
 755             handle_mousebutton(ev);
 756             break;
 757         case SDL_MOUSEWHEEL:
 758             handle_mousewheel(ev);
 759             break;
 760         case SDL_WINDOWEVENT:
 761             handle_windowevent(dcl, ev);
 762             break;
 763         default:
 764             break;
 765         }
 766     }
 767 }
 768
 769 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 770                            int x, int y, int on)
 771 {
 772     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 773     if (on) {
 774         if (!guest_cursor) {
 775             sdl_show_cursor();
 776         }
 777         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 778             SDL_SetCursor(guest_sprite);
 779             if (!qemu_input_is_absolute() && !absolute_enabled) {
 780                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 781             }
 782         }
 783     } else if (gui_grab) {
 784         sdl_hide_cursor();
 785     }
 786     guest_cursor = on;
 787     guest_x = x, guest_y = y;
 788 }
 789
 790 static void sdl_mouse_define(DisplayChangeListener *dcl,
 791                              QEMUCursor *c)
 792 {
 793
 794     if (guest_sprite) {
 795         SDL_FreeCursor(guest_sprite);
 796     }
 797
 798     if (guest_sprite_surface) {
 799         SDL_FreeSurface(guest_sprite_surface);
 800     }
 801
 802     guest_sprite_surface =
 803         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 804                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 805
 806     if (!guest_sprite_surface) {
 807         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 808         return;
 809     }
 810     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 811                                          c->hot_x, c->hot_y);
 812     if (!guest_sprite) {
 813         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 814         return;
 815     }
 816     if (guest_cursor &&
 817         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 818         SDL_SetCursor(guest_sprite);
 819     }
 820 }
 821
 822 static void sdl_cleanup(void)
 823 {
 824     if (guest_sprite) {
 825         SDL_FreeCursor(guest_sprite);
 826     }
 827     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 828 }
 829
 830 static const DisplayChangeListenerOps dcl_ops = {
 831     .dpy_name          = "sdl",
 832     .dpy_gfx_update    = sdl_update,
 833     .dpy_gfx_switch    = sdl_switch,
 834     .dpy_refresh       = sdl_refresh,
 835     .dpy_mouse_set     = sdl_mouse_warp,
 836     .dpy_cursor_define = sdl_mouse_define,
 837 };
 838
 839 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 840 {
 841     int flags;
 842     uint8_t data = 0;
 843     char *filename;
 844     int i;
 845
 846     if (no_frame) {
 847         gui_noframe = 1;
 848     }
 849
 850 #ifdef __linux__
 851     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 852      * accessible $DISPLAY to open X11 window.  This is often the case
 853      * when qemu is run using sudo.  But in this case, and when actually
 854      * run in X11 environment, SDL fights with X11 for the video card,
 855      * making current display unavailable, often until reboot.
 856      * So make x11 the default SDL video driver if this variable is unset.
 857      * This is a bit hackish but saves us from bigger problem.
 858      * Maybe it's a good idea to fix this in SDL instead.
 859      */
 860     setenv("SDL_VIDEODRIVER", "x11", 0);
 861 #endif
 862
 863     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 864     if (SDL_Init(flags)) {
 865         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 866                 SDL_GetError());
 867         exit(1);
 868     }
 869
 870     for (i = 0;; i++) {
 871         QemuConsole *con = qemu_console_lookup_by_index(i);
 872         if (!con) {
 873             break;
 874         }
 875     }
 876     sdl2_num_outputs = i;
 877     sdl2_console = g_new0(struct sdl2_state, sdl2_num_outputs);
 878     for (i = 0; i < sdl2_num_outputs; i++) {
 879         QemuConsole *con = qemu_console_lookup_by_index(i);
 880         if (!qemu_console_is_graphic(con)) {
 881             sdl2_console[i].hidden = true;
 882         }
 883         sdl2_console[i].dcl.ops = &dcl_ops;
 884         sdl2_console[i].dcl.con = con;
 885         register_displaychangelistener(&sdl2_console[i].dcl);
 886         sdl2_console[i].idx = i;
 887     }
 888
 889     /* Load a 32x32x4 image. White pixels are transparent. */
 890     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 891     if (filename) {
 892         SDL_Surface *image = SDL_LoadBMP(filename);
 893         if (image) {
 894             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 895             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 896             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 897         }
 898         g_free(filename);
 899     }
 900
 901     if (full_screen) {
 902         gui_fullscreen = 1;
 903         sdl_grab_start(0);
 904     }
 905
 906     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 907     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 908
 909     gui_grab = 0;
 910
 911     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 912     sdl_cursor_normal = SDL_GetCursor();
 913
 914     atexit(sdl_cleanup);
 915 }
 916 #endif