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
  39 #include "sdl2-keymap.h"
  40
  41 static int sdl2_num_outputs;
  42 static struct sdl2_state {
  43     DisplayChangeListener dcl;
  44     DisplaySurface *surface;
  45     SDL_Texture *texture;
  46     SDL_Window *real_window;
  47     SDL_Renderer *real_renderer;
  48     int idx;
  49     int last_vm_running; /* per console for caption reasons */
  50     int x, y;
  51     int hidden;
  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         if (scon->hidden) {
 140             flags |= SDL_WINDOW_HIDDEN;
 141         }
 142
 143         scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
 144                                              SDL_WINDOWPOS_UNDEFINED,
 145                                              width, height, flags);
 146         scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
 147         sdl_update_caption(scon);
 148     }
 149 }
 150
 151 static void sdl_switch(DisplayChangeListener *dcl,
 152                        DisplaySurface *new_surface)
 153 {
 154     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 155     int format = 0;
 156     int idx = scon->idx;
 157     DisplaySurface *old_surface = scon->surface;
 158
 159     /* temporary hack: allows to call sdl_switch to handle scaling changes */
 160     if (new_surface) {
 161         scon->surface = new_surface;
 162     }
 163
 164     if (!new_surface && idx > 0) {
 165         scon->surface = NULL;
 166     }
 167
 168     if (new_surface == NULL) {
 169         do_sdl_resize(scon, 0, 0, 0);
 170     } else {
 171         do_sdl_resize(scon, surface_width(scon->surface),
 172                       surface_height(scon->surface), 0);
 173     }
 174
 175     if (old_surface && scon->texture) {
 176         SDL_DestroyTexture(scon->texture);
 177         scon->texture = NULL;
 178     }
 179
 180     if (new_surface) {
 181         if (!scon->texture) {
 182             if (surface_bits_per_pixel(scon->surface) == 16) {
 183                 format = SDL_PIXELFORMAT_RGB565;
 184             } else if (surface_bits_per_pixel(scon->surface) == 32) {
 185                 format = SDL_PIXELFORMAT_ARGB8888;
 186             }
 187
 188             scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 189                                               SDL_TEXTUREACCESS_STREAMING,
 190                                               surface_width(new_surface),
 191                                               surface_height(new_surface));
 192         }
 193     }
 194 }
 195
 196 static void reset_keys(struct sdl2_state *scon)
 197 {
 198     QemuConsole *con = scon ? scon->dcl.con : NULL;
 199     int i;
 200
 201     for (i = 0; i < 256; i++) {
 202         if (modifiers_state[i]) {
 203             int qcode = sdl2_scancode_to_qcode[i];
 204             qemu_input_event_send_key_qcode(con, qcode, false);
 205             modifiers_state[i] = 0;
 206         }
 207     }
 208 }
 209
 210 static void sdl_process_key(struct sdl2_state *scon,
 211                             SDL_KeyboardEvent *ev)
 212 {
 213     int qcode = sdl2_scancode_to_qcode[ev->keysym.scancode];
 214     QemuConsole *con = scon ? scon->dcl.con : NULL;
 215
 216     if (!qemu_console_is_graphic(con)) {
 217         if (ev->type == SDL_KEYDOWN) {
 218             switch (ev->keysym.scancode) {
 219             case SDL_SCANCODE_RETURN:
 220                 kbd_put_keysym_console(con, '\n');
 221                 break;
 222             case SDL_SCANCODE_BACKSPACE:
 223                 kbd_put_keysym_console(con, QEMU_KEY_BACKSPACE);
 224                 break;
 225             default:
 226                 kbd_put_qcode_console(con, qcode);
 227                 break;
 228             }
 229         }
 230         return;
 231     }
 232
 233     switch (ev->keysym.scancode) {
 234 #if 0
 235     case SDL_SCANCODE_NUMLOCKCLEAR:
 236     case SDL_SCANCODE_CAPSLOCK:
 237         /* SDL does not send the key up event, so we generate it */
 238         qemu_input_event_send_key_qcode(con, qcode, true);
 239         qemu_input_event_send_key_qcode(con, qcode, false);
 240         return;
 241 #endif
 242     case SDL_SCANCODE_LCTRL:
 243     case SDL_SCANCODE_LSHIFT:
 244     case SDL_SCANCODE_LALT:
 245     case SDL_SCANCODE_LGUI:
 246     case SDL_SCANCODE_RCTRL:
 247     case SDL_SCANCODE_RSHIFT:
 248     case SDL_SCANCODE_RALT:
 249     case SDL_SCANCODE_RGUI:
 250         if (ev->type == SDL_KEYUP) {
 251             modifiers_state[ev->keysym.scancode] = 0;
 252         } else {
 253             modifiers_state[ev->keysym.scancode] = 1;
 254         }
 255         /* fall though */
 256     default:
 257         qemu_input_event_send_key_qcode(con, qcode,
 258                                         ev->type == SDL_KEYDOWN);
 259     }
 260 }
 261
 262 static void sdl_update_caption(struct sdl2_state *scon)
 263 {
 264     char win_title[1024];
 265     char icon_title[1024];
 266     const char *status = "";
 267
 268     if (!runstate_is_running()) {
 269         status = " [Stopped]";
 270     } else if (gui_grab) {
 271         if (alt_grab) {
 272             status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 273         } else if (ctrl_grab) {
 274             status = " - Press Right-Ctrl to exit mouse grab";
 275         } else {
 276             status = " - Press Ctrl-Alt to exit mouse grab";
 277         }
 278     }
 279
 280     if (qemu_name) {
 281         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 282                  scon->idx, status);
 283         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 284     } else {
 285         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 286         snprintf(icon_title, sizeof(icon_title), "QEMU");
 287     }
 288
 289     if (scon->real_window) {
 290         SDL_SetWindowTitle(scon->real_window, win_title);
 291     }
 292 }
 293
 294 static void sdl_hide_cursor(void)
 295 {
 296     if (!cursor_hide) {
 297         return;
 298     }
 299
 300     if (qemu_input_is_absolute()) {
 301         SDL_ShowCursor(1);
 302         SDL_SetCursor(sdl_cursor_hidden);
 303     } else {
 304         SDL_SetRelativeMouseMode(SDL_TRUE);
 305     }
 306 }
 307
 308 static void sdl_show_cursor(void)
 309 {
 310     if (!cursor_hide) {
 311         return;
 312     }
 313
 314     if (!qemu_input_is_absolute()) {
 315         SDL_SetRelativeMouseMode(SDL_FALSE);
 316         SDL_ShowCursor(1);
 317         if (guest_cursor &&
 318             (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 319             SDL_SetCursor(guest_sprite);
 320         } else {
 321             SDL_SetCursor(sdl_cursor_normal);
 322         }
 323     }
 324 }
 325
 326 static void sdl_grab_start(struct sdl2_state *scon)
 327 {
 328     QemuConsole *con = scon ? scon->dcl.con : NULL;
 329
 330     if (!con || !qemu_console_is_graphic(con)) {
 331         return;
 332     }
 333     /*
 334      * If the application is not active, do not try to enter grab state. This
 335      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 336      * application (SDL bug).
 337      */
 338     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 339         return;
 340     }
 341     if (guest_cursor) {
 342         SDL_SetCursor(guest_sprite);
 343         if (!qemu_input_is_absolute() && !absolute_enabled) {
 344             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 345         }
 346     } else {
 347         sdl_hide_cursor();
 348     }
 349     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 350     gui_grab = 1;
 351     sdl_update_caption(scon);
 352 }
 353
 354 static void sdl_grab_end(struct sdl2_state *scon)
 355 {
 356     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 357     gui_grab = 0;
 358     sdl_show_cursor();
 359     sdl_update_caption(scon);
 360 }
 361
 362 static void absolute_mouse_grab(struct sdl2_state *scon)
 363 {
 364     int mouse_x, mouse_y;
 365     int scr_w, scr_h;
 366     SDL_GetMouseState(&mouse_x, &mouse_y);
 367     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 368     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 369         mouse_y > 0 && mouse_y < scr_h - 1) {
 370         sdl_grab_start(scon);
 371     }
 372 }
 373
 374 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 375 {
 376     if (qemu_input_is_absolute()) {
 377         if (!absolute_enabled) {
 378             absolute_enabled = 1;
 379             absolute_mouse_grab(&sdl2_console[0]);
 380         }
 381     } else if (absolute_enabled) {
 382         if (!gui_fullscreen) {
 383             sdl_grab_end(&sdl2_console[0]);
 384         }
 385         absolute_enabled = 0;
 386     }
 387 }
 388
 389 static void sdl_send_mouse_event(struct sdl2_state *scon, int dx, int dy,
 390                                  int x, int y, int state)
 391 {
 392     static uint32_t bmap[INPUT_BUTTON_MAX] = {
 393         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 394         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 395         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 396     };
 397     static uint32_t prev_state;
 398
 399     if (prev_state != state) {
 400         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 401         prev_state = state;
 402     }
 403
 404     if (qemu_input_is_absolute()) {
 405         int scr_w, scr_h;
 406         int max_w = 0, max_h = 0;
 407         int off_x = 0, off_y = 0;
 408         int cur_off_x = 0, cur_off_y = 0;
 409         int i;
 410
 411         for (i = 0; i < sdl2_num_outputs; i++) {
 412             struct sdl2_state *thiscon = &sdl2_console[i];
 413             if (thiscon->real_window && thiscon->surface) {
 414                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 415                 cur_off_x = thiscon->x;
 416                 cur_off_y = thiscon->y;
 417                 if (scr_w + cur_off_x > max_w) {
 418                     max_w = scr_w + cur_off_x;
 419                 }
 420                 if (scr_h + cur_off_y > max_h) {
 421                     max_h = scr_h + cur_off_y;
 422                 }
 423                 if (i == scon->idx) {
 424                     off_x = cur_off_x;
 425                     off_y = cur_off_y;
 426                 }
 427             }
 428         }
 429         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 430         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 431     } else {
 432         if (guest_cursor) {
 433             x -= guest_x;
 434             y -= guest_y;
 435             guest_x += x;
 436             guest_y += y;
 437             dx = x;
 438             dy = y;
 439         }
 440         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 441         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 442     }
 443     qemu_input_event_sync();
 444 }
 445
 446 static void sdl_scale(struct sdl2_state *scon, int width, int height)
 447 {
 448     int bpp = 0;
 449     do_sdl_resize(scon, width, height, bpp);
 450     scaling_active = 1;
 451 }
 452
 453 static void toggle_full_screen(struct sdl2_state *scon)
 454 {
 455     int width = surface_width(scon->surface);
 456     int height = surface_height(scon->surface);
 457     int bpp = surface_bits_per_pixel(scon->surface);
 458
 459     gui_fullscreen = !gui_fullscreen;
 460     if (gui_fullscreen) {
 461         SDL_GetWindowSize(scon->real_window,
 462                           &gui_saved_width, &gui_saved_height);
 463         gui_saved_scaling = scaling_active;
 464
 465         do_sdl_resize(scon, width, height, bpp);
 466         scaling_active = 0;
 467
 468         gui_saved_grab = gui_grab;
 469         sdl_grab_start(scon);
 470     } else {
 471         if (gui_saved_scaling) {
 472             sdl_scale(scon, gui_saved_width, gui_saved_height);
 473         } else {
 474             do_sdl_resize(scon, width, height, 0);
 475         }
 476         if (!gui_saved_grab) {
 477             sdl_grab_end(scon);
 478         }
 479     }
 480     graphic_hw_invalidate(scon->dcl.con);
 481     graphic_hw_update(scon->dcl.con);
 482 }
 483
 484 static void handle_keydown(SDL_Event *ev)
 485 {
 486     int mod_state, win;
 487     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 488
 489     if (alt_grab) {
 490         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 491             (gui_grab_code | KMOD_LSHIFT);
 492     } else if (ctrl_grab) {
 493         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 494     } else {
 495         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 496     }
 497     gui_key_modifier_pressed = mod_state;
 498
 499     if (gui_key_modifier_pressed) {
 500         switch (ev->key.keysym.scancode) {
 501         case SDL_SCANCODE_2:
 502         case SDL_SCANCODE_3:
 503         case SDL_SCANCODE_4:
 504         case SDL_SCANCODE_5:
 505         case SDL_SCANCODE_6:
 506         case SDL_SCANCODE_7:
 507         case SDL_SCANCODE_8:
 508         case SDL_SCANCODE_9:
 509             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 510             if (win < sdl2_num_outputs) {
 511                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 512                 if (sdl2_console[win].real_window) {
 513                     if (sdl2_console[win].hidden) {
 514                         SDL_HideWindow(sdl2_console[win].real_window);
 515                     } else {
 516                         SDL_ShowWindow(sdl2_console[win].real_window);
 517                     }
 518                 }
 519                 gui_keysym = 1;
 520             }
 521             break;
 522         case SDL_SCANCODE_F:
 523             toggle_full_screen(scon);
 524             gui_keysym = 1;
 525             break;
 526         case SDL_SCANCODE_U:
 527             if (scaling_active) {
 528                 scaling_active = 0;
 529                 sdl_switch(&scon->dcl, NULL);
 530                 graphic_hw_invalidate(scon->dcl.con);
 531                 graphic_hw_update(scon->dcl.con);
 532             }
 533             gui_keysym = 1;
 534             break;
 535         case SDL_SCANCODE_KP_PLUS:
 536         case SDL_SCANCODE_KP_MINUS:
 537             if (!gui_fullscreen) {
 538                 int scr_w, scr_h;
 539                 int width, height;
 540                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 541
 542                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 543                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 544                             160);
 545                 height = (surface_height(scon->surface) * width) /
 546                     surface_width(scon->surface);
 547
 548                 sdl_scale(scon, width, height);
 549                 graphic_hw_invalidate(NULL);
 550                 graphic_hw_update(NULL);
 551                 gui_keysym = 1;
 552             }
 553         default:
 554             break;
 555         }
 556     }
 557     if (!gui_keysym) {
 558         sdl_process_key(scon, &ev->key);
 559     }
 560 }
 561
 562 static void handle_keyup(SDL_Event *ev)
 563 {
 564     int mod_state;
 565     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 566
 567     if (!alt_grab) {
 568         mod_state = (ev->key.keysym.mod & gui_grab_code);
 569     } else {
 570         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 571     }
 572     if (!mod_state && gui_key_modifier_pressed) {
 573         gui_key_modifier_pressed = 0;
 574         if (gui_keysym == 0) {
 575             /* exit/enter grab if pressing Ctrl-Alt */
 576             if (!gui_grab) {
 577                 sdl_grab_start(scon);
 578             } else if (!gui_fullscreen) {
 579                 sdl_grab_end(scon);
 580             }
 581             /* SDL does not send back all the modifiers key, so we must
 582              * correct it. */
 583             reset_keys(scon);
 584             return;
 585         }
 586         gui_keysym = 0;
 587     }
 588     if (!gui_keysym) {
 589         sdl_process_key(scon, &ev->key);
 590     }
 591 }
 592
 593 static void handle_textinput(SDL_Event *ev)
 594 {
 595     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 596     QemuConsole *con = scon ? scon->dcl.con : NULL;
 597
 598     if (qemu_console_is_graphic(con)) {
 599         return;
 600     }
 601     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 602 }
 603
 604 static void handle_mousemotion(SDL_Event *ev)
 605 {
 606     int max_x, max_y;
 607     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 608
 609     if (qemu_input_is_absolute() || absolute_enabled) {
 610         int scr_w, scr_h;
 611         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 612         max_x = scr_w - 1;
 613         max_y = scr_h - 1;
 614         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 615                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 616             sdl_grab_end(scon);
 617         }
 618         if (!gui_grab &&
 619             (ev->motion.x > 0 && ev->motion.x < max_x &&
 620              ev->motion.y > 0 && ev->motion.y < max_y)) {
 621             sdl_grab_start(scon);
 622         }
 623     }
 624     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 625         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 626                              ev->motion.x, ev->motion.y, ev->motion.state);
 627     }
 628 }
 629
 630 static void handle_mousebutton(SDL_Event *ev)
 631 {
 632     int buttonstate = SDL_GetMouseState(NULL, NULL);
 633     SDL_MouseButtonEvent *bev;
 634     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 635
 636     bev = &ev->button;
 637     if (!gui_grab && !qemu_input_is_absolute()) {
 638         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 639             /* start grabbing all events */
 640             sdl_grab_start(scon);
 641         }
 642     } else {
 643         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 644             buttonstate |= SDL_BUTTON(bev->button);
 645         } else {
 646             buttonstate &= ~SDL_BUTTON(bev->button);
 647         }
 648         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 649     }
 650 }
 651
 652 static void handle_mousewheel(SDL_Event *ev)
 653 {
 654     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 655     SDL_MouseWheelEvent *wev = &ev->wheel;
 656     InputButton btn;
 657
 658     if (wev->y > 0) {
 659         btn = INPUT_BUTTON_WHEEL_UP;
 660     } else if (wev->y < 0) {
 661         btn = INPUT_BUTTON_WHEEL_DOWN;
 662     } else {
 663         return;
 664     }
 665
 666     qemu_input_queue_btn(scon->dcl.con, btn, true);
 667     qemu_input_event_sync();
 668     qemu_input_queue_btn(scon->dcl.con, btn, false);
 669     qemu_input_event_sync();
 670 }
 671
 672 static void handle_windowevent(DisplayChangeListener *dcl, SDL_Event *ev)
 673 {
 674     int w, h;
 675     struct sdl2_state *scon = get_scon_from_window(ev->key.windowID);
 676
 677     switch (ev->window.event) {
 678     case SDL_WINDOWEVENT_RESIZED:
 679         sdl_scale(scon, ev->window.data1, ev->window.data2);
 680         {
 681             QemuUIInfo info;
 682             memset(&info, 0, sizeof(info));
 683             info.width = ev->window.data1;
 684             info.height = ev->window.data2;
 685             dpy_set_ui_info(scon->dcl.con, &info);
 686         }
 687         graphic_hw_invalidate(scon->dcl.con);
 688         graphic_hw_update(scon->dcl.con);
 689         break;
 690     case SDL_WINDOWEVENT_EXPOSED:
 691         SDL_GetWindowSize(SDL_GetWindowFromID(ev->window.windowID), &w, &h);
 692         sdl_update(dcl, 0, 0, w, h);
 693         break;
 694     case SDL_WINDOWEVENT_FOCUS_GAINED:
 695     case SDL_WINDOWEVENT_ENTER:
 696         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 697             absolute_mouse_grab(scon);
 698         }
 699         break;
 700     case SDL_WINDOWEVENT_FOCUS_LOST:
 701         if (gui_grab && !gui_fullscreen) {
 702             sdl_grab_end(scon);
 703         }
 704         break;
 705     case SDL_WINDOWEVENT_RESTORED:
 706         update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 707         break;
 708     case SDL_WINDOWEVENT_MINIMIZED:
 709         update_displaychangelistener(dcl, 500);
 710         break;
 711     case SDL_WINDOWEVENT_CLOSE:
 712         if (!no_quit) {
 713             no_shutdown = 0;
 714             qemu_system_shutdown_request();
 715         }
 716         break;
 717     }
 718 }
 719
 720 static void sdl_refresh(DisplayChangeListener *dcl)
 721 {
 722     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 723     SDL_Event ev1, *ev = &ev1;
 724
 725     if (scon->last_vm_running != runstate_is_running()) {
 726         scon->last_vm_running = runstate_is_running();
 727         sdl_update_caption(scon);
 728     }
 729
 730     graphic_hw_update(dcl->con);
 731
 732     while (SDL_PollEvent(ev)) {
 733         switch (ev->type) {
 734         case SDL_KEYDOWN:
 735             handle_keydown(ev);
 736             break;
 737         case SDL_KEYUP:
 738             handle_keyup(ev);
 739             break;
 740         case SDL_TEXTINPUT:
 741             handle_textinput(ev);
 742             break;
 743         case SDL_QUIT:
 744             if (!no_quit) {
 745                 no_shutdown = 0;
 746                 qemu_system_shutdown_request();
 747             }
 748             break;
 749         case SDL_MOUSEMOTION:
 750             handle_mousemotion(ev);
 751             break;
 752         case SDL_MOUSEBUTTONDOWN:
 753         case SDL_MOUSEBUTTONUP:
 754             handle_mousebutton(ev);
 755             break;
 756         case SDL_MOUSEWHEEL:
 757             handle_mousewheel(ev);
 758             break;
 759         case SDL_WINDOWEVENT:
 760             handle_windowevent(dcl, ev);
 761             break;
 762         default:
 763             break;
 764         }
 765     }
 766 }
 767
 768 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 769                            int x, int y, int on)
 770 {
 771     struct sdl2_state *scon = container_of(dcl, struct sdl2_state, dcl);
 772     if (on) {
 773         if (!guest_cursor) {
 774             sdl_show_cursor();
 775         }
 776         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 777             SDL_SetCursor(guest_sprite);
 778             if (!qemu_input_is_absolute() && !absolute_enabled) {
 779                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 780             }
 781         }
 782     } else if (gui_grab) {
 783         sdl_hide_cursor();
 784     }
 785     guest_cursor = on;
 786     guest_x = x, guest_y = y;
 787 }
 788
 789 static void sdl_mouse_define(DisplayChangeListener *dcl,
 790                              QEMUCursor *c)
 791 {
 792
 793     if (guest_sprite) {
 794         SDL_FreeCursor(guest_sprite);
 795     }
 796
 797     if (guest_sprite_surface) {
 798         SDL_FreeSurface(guest_sprite_surface);
 799     }
 800
 801     guest_sprite_surface =
 802         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 803                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 804
 805     if (!guest_sprite_surface) {
 806         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 807         return;
 808     }
 809     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 810                                          c->hot_x, c->hot_y);
 811     if (!guest_sprite) {
 812         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 813         return;
 814     }
 815     if (guest_cursor &&
 816         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 817         SDL_SetCursor(guest_sprite);
 818     }
 819 }
 820
 821 static void sdl_cleanup(void)
 822 {
 823     if (guest_sprite) {
 824         SDL_FreeCursor(guest_sprite);
 825     }
 826     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 827 }
 828
 829 static const DisplayChangeListenerOps dcl_ops = {
 830     .dpy_name          = "sdl",
 831     .dpy_gfx_update    = sdl_update,
 832     .dpy_gfx_switch    = sdl_switch,
 833     .dpy_refresh       = sdl_refresh,
 834     .dpy_mouse_set     = sdl_mouse_warp,
 835     .dpy_cursor_define = sdl_mouse_define,
 836 };
 837
 838 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 839 {
 840     int flags;
 841     uint8_t data = 0;
 842     char *filename;
 843     int i;
 844
 845     if (no_frame) {
 846         gui_noframe = 1;
 847     }
 848
 849 #ifdef __linux__
 850     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 851      * accessible $DISPLAY to open X11 window.  This is often the case
 852      * when qemu is run using sudo.  But in this case, and when actually
 853      * run in X11 environment, SDL fights with X11 for the video card,
 854      * making current display unavailable, often until reboot.
 855      * So make x11 the default SDL video driver if this variable is unset.
 856      * This is a bit hackish but saves us from bigger problem.
 857      * Maybe it's a good idea to fix this in SDL instead.
 858      */
 859     setenv("SDL_VIDEODRIVER", "x11", 0);
 860 #endif
 861
 862     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 863     if (SDL_Init(flags)) {
 864         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 865                 SDL_GetError());
 866         exit(1);
 867     }
 868
 869     for (i = 0;; i++) {
 870         QemuConsole *con = qemu_console_lookup_by_index(i);
 871         if (!con) {
 872             break;
 873         }
 874     }
 875     sdl2_num_outputs = i;
 876     sdl2_console = g_new0(struct sdl2_state, sdl2_num_outputs);
 877     for (i = 0; i < sdl2_num_outputs; i++) {
 878         QemuConsole *con = qemu_console_lookup_by_index(i);
 879         if (!qemu_console_is_graphic(con)) {
 880             sdl2_console[i].hidden = true;
 881         }
 882         sdl2_console[i].dcl.ops = &dcl_ops;
 883         sdl2_console[i].dcl.con = con;
 884         register_displaychangelistener(&sdl2_console[i].dcl);
 885         sdl2_console[i].idx = i;
 886     }
 887
 888     /* Load a 32x32x4 image. White pixels are transparent. */
 889     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 890     if (filename) {
 891         SDL_Surface *image = SDL_LoadBMP(filename);
 892         if (image) {
 893             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 894             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 895             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 896         }
 897         g_free(filename);
 898     }
 899
 900     if (full_screen) {
 901         gui_fullscreen = 1;
 902         sdl_grab_start(0);
 903     }
 904
 905     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 906     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 907
 908     gui_grab = 0;
 909
 910     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 911     sdl_cursor_normal = SDL_GetCursor();
 912
 913     atexit(sdl_cleanup);
 914 }
 915 #endif