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 #include <SDL_syswm.h>
  31
  32 #include "qemu-common.h"
  33 #include "ui/console.h"
  34 #include "ui/input.h"
  35 #include "ui/sdl2.h"
  36 #include "sysemu/sysemu.h"
  37
  38 static int sdl2_num_outputs;
  39 static struct sdl2_console *sdl2_console;
  40
  41 static SDL_Surface *guest_sprite_surface;
  42 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  43
  44 static bool gui_saved_scaling;
  45 static int gui_saved_width;
  46 static int gui_saved_height;
  47 static int gui_saved_grab;
  48 static int gui_fullscreen;
  49 static int gui_noframe;
  50 static int gui_key_modifier_pressed;
  51 static int gui_keysym;
  52 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  53 static SDL_Cursor *sdl_cursor_normal;
  54 static SDL_Cursor *sdl_cursor_hidden;
  55 static int absolute_enabled;
  56 static int guest_cursor;
  57 static int guest_x, guest_y;
  58 static SDL_Cursor *guest_sprite;
  59 static int scaling_active;
  60 static Notifier mouse_mode_notifier;
  61
  62 static void sdl_update_caption(struct sdl2_console *scon);
  63
  64 static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  65 {
  66     int i;
  67     for (i = 0; i < sdl2_num_outputs; i++) {
  68         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  69             return &sdl2_console[i];
  70         }
  71     }
  72     return NULL;
  73 }
  74
  75 static void sdl_update(DisplayChangeListener *dcl,
  76                        int x, int y, int w, int h)
  77 {
  78     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
  79     SDL_Rect rect;
  80     DisplaySurface *surf = qemu_console_surface(dcl->con);
  81
  82     if (!surf) {
  83         return;
  84     }
  85     if (!scon->texture) {
  86         return;
  87     }
  88
  89     rect.x = x;
  90     rect.y = y;
  91     rect.w = w;
  92     rect.h = h;
  93
  94     SDL_UpdateTexture(scon->texture, NULL, surface_data(surf),
  95                       surface_stride(surf));
  96     SDL_RenderCopy(scon->real_renderer, scon->texture, &rect, &rect);
  97     SDL_RenderPresent(scon->real_renderer);
  98 }
  99
 100 static void do_sdl_resize(struct sdl2_console *scon, int width, int height,
 101                           int bpp)
 102 {
 103     int flags;
 104
 105     if (scon->real_window && scon->real_renderer) {
 106         if (width && height) {
 107             SDL_RenderSetLogicalSize(scon->real_renderer, width, height);
 108             SDL_SetWindowSize(scon->real_window, width, height);
 109         } else {
 110             SDL_DestroyRenderer(scon->real_renderer);
 111             SDL_DestroyWindow(scon->real_window);
 112             scon->real_renderer = NULL;
 113             scon->real_window = NULL;
 114         }
 115     } else {
 116         if (!width || !height) {
 117             return;
 118         }
 119         flags = 0;
 120         if (gui_fullscreen) {
 121             flags |= SDL_WINDOW_FULLSCREEN;
 122         } else {
 123             flags |= SDL_WINDOW_RESIZABLE;
 124         }
 125         if (scon->hidden) {
 126             flags |= SDL_WINDOW_HIDDEN;
 127         }
 128
 129         scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
 130                                              SDL_WINDOWPOS_UNDEFINED,
 131                                              width, height, flags);
 132         scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
 133         sdl_update_caption(scon);
 134     }
 135 }
 136
 137 static void sdl_switch(DisplayChangeListener *dcl,
 138                        DisplaySurface *new_surface)
 139 {
 140     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 141     int format = 0;
 142     int idx = scon->idx;
 143     DisplaySurface *old_surface = scon->surface;
 144
 145     /* temporary hack: allows to call sdl_switch to handle scaling changes */
 146     if (new_surface) {
 147         scon->surface = new_surface;
 148     }
 149
 150     if (!new_surface && idx > 0) {
 151         scon->surface = NULL;
 152     }
 153
 154     if (new_surface == NULL) {
 155         do_sdl_resize(scon, 0, 0, 0);
 156     } else {
 157         do_sdl_resize(scon, surface_width(scon->surface),
 158                       surface_height(scon->surface), 0);
 159     }
 160
 161     if (old_surface && scon->texture) {
 162         SDL_DestroyTexture(scon->texture);
 163         scon->texture = NULL;
 164     }
 165
 166     if (new_surface) {
 167         if (!scon->texture) {
 168             if (surface_bits_per_pixel(scon->surface) == 16) {
 169                 format = SDL_PIXELFORMAT_RGB565;
 170             } else if (surface_bits_per_pixel(scon->surface) == 32) {
 171                 format = SDL_PIXELFORMAT_ARGB8888;
 172             }
 173
 174             scon->texture = SDL_CreateTexture(scon->real_renderer, format,
 175                                               SDL_TEXTUREACCESS_STREAMING,
 176                                               surface_width(new_surface),
 177                                               surface_height(new_surface));
 178         }
 179     }
 180 }
 181
 182 static void sdl_update_caption(struct sdl2_console *scon)
 183 {
 184     char win_title[1024];
 185     char icon_title[1024];
 186     const char *status = "";
 187
 188     if (!runstate_is_running()) {
 189         status = " [Stopped]";
 190     } else if (gui_grab) {
 191         if (alt_grab) {
 192             status = " - Press Ctrl-Alt-Shift to exit grab";
 193         } else if (ctrl_grab) {
 194             status = " - Press Right-Ctrl to exit grab";
 195         } else {
 196             status = " - Press Ctrl-Alt to exit grab";
 197         }
 198     }
 199
 200     if (qemu_name) {
 201         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 202                  scon->idx, status);
 203         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 204     } else {
 205         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 206         snprintf(icon_title, sizeof(icon_title), "QEMU");
 207     }
 208
 209     if (scon->real_window) {
 210         SDL_SetWindowTitle(scon->real_window, win_title);
 211     }
 212 }
 213
 214 static void sdl_hide_cursor(void)
 215 {
 216     if (!cursor_hide) {
 217         return;
 218     }
 219
 220     if (qemu_input_is_absolute()) {
 221         SDL_ShowCursor(1);
 222         SDL_SetCursor(sdl_cursor_hidden);
 223     } else {
 224         SDL_SetRelativeMouseMode(SDL_TRUE);
 225     }
 226 }
 227
 228 static void sdl_show_cursor(void)
 229 {
 230     if (!cursor_hide) {
 231         return;
 232     }
 233
 234     if (!qemu_input_is_absolute()) {
 235         SDL_SetRelativeMouseMode(SDL_FALSE);
 236         SDL_ShowCursor(1);
 237         if (guest_cursor &&
 238             (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 239             SDL_SetCursor(guest_sprite);
 240         } else {
 241             SDL_SetCursor(sdl_cursor_normal);
 242         }
 243     }
 244 }
 245
 246 static void sdl_grab_start(struct sdl2_console *scon)
 247 {
 248     QemuConsole *con = scon ? scon->dcl.con : NULL;
 249
 250     if (!con || !qemu_console_is_graphic(con)) {
 251         return;
 252     }
 253     /*
 254      * If the application is not active, do not try to enter grab state. This
 255      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 256      * application (SDL bug).
 257      */
 258     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 259         return;
 260     }
 261     if (guest_cursor) {
 262         SDL_SetCursor(guest_sprite);
 263         if (!qemu_input_is_absolute() && !absolute_enabled) {
 264             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 265         }
 266     } else {
 267         sdl_hide_cursor();
 268     }
 269     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 270     gui_grab = 1;
 271     sdl_update_caption(scon);
 272 }
 273
 274 static void sdl_grab_end(struct sdl2_console *scon)
 275 {
 276     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 277     gui_grab = 0;
 278     sdl_show_cursor();
 279     sdl_update_caption(scon);
 280 }
 281
 282 static void absolute_mouse_grab(struct sdl2_console *scon)
 283 {
 284     int mouse_x, mouse_y;
 285     int scr_w, scr_h;
 286     SDL_GetMouseState(&mouse_x, &mouse_y);
 287     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 288     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 289         mouse_y > 0 && mouse_y < scr_h - 1) {
 290         sdl_grab_start(scon);
 291     }
 292 }
 293
 294 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 295 {
 296     if (qemu_input_is_absolute()) {
 297         if (!absolute_enabled) {
 298             absolute_enabled = 1;
 299             absolute_mouse_grab(&sdl2_console[0]);
 300         }
 301     } else if (absolute_enabled) {
 302         if (!gui_fullscreen) {
 303             sdl_grab_end(&sdl2_console[0]);
 304         }
 305         absolute_enabled = 0;
 306     }
 307 }
 308
 309 static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 310                                  int x, int y, int state)
 311 {
 312     static uint32_t bmap[INPUT_BUTTON_MAX] = {
 313         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 314         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 315         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 316     };
 317     static uint32_t prev_state;
 318
 319     if (prev_state != state) {
 320         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 321         prev_state = state;
 322     }
 323
 324     if (qemu_input_is_absolute()) {
 325         int scr_w, scr_h;
 326         int max_w = 0, max_h = 0;
 327         int off_x = 0, off_y = 0;
 328         int cur_off_x = 0, cur_off_y = 0;
 329         int i;
 330
 331         for (i = 0; i < sdl2_num_outputs; i++) {
 332             struct sdl2_console *thiscon = &sdl2_console[i];
 333             if (thiscon->real_window && thiscon->surface) {
 334                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 335                 cur_off_x = thiscon->x;
 336                 cur_off_y = thiscon->y;
 337                 if (scr_w + cur_off_x > max_w) {
 338                     max_w = scr_w + cur_off_x;
 339                 }
 340                 if (scr_h + cur_off_y > max_h) {
 341                     max_h = scr_h + cur_off_y;
 342                 }
 343                 if (i == scon->idx) {
 344                     off_x = cur_off_x;
 345                     off_y = cur_off_y;
 346                 }
 347             }
 348         }
 349         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 350         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 351     } else {
 352         if (guest_cursor) {
 353             x -= guest_x;
 354             y -= guest_y;
 355             guest_x += x;
 356             guest_y += y;
 357             dx = x;
 358             dy = y;
 359         }
 360         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 361         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 362     }
 363     qemu_input_event_sync();
 364 }
 365
 366 static void sdl_scale(struct sdl2_console *scon, int width, int height)
 367 {
 368     int bpp = 0;
 369     do_sdl_resize(scon, width, height, bpp);
 370     scaling_active = 1;
 371 }
 372
 373 static void toggle_full_screen(struct sdl2_console *scon)
 374 {
 375     int width = surface_width(scon->surface);
 376     int height = surface_height(scon->surface);
 377     int bpp = surface_bits_per_pixel(scon->surface);
 378
 379     gui_fullscreen = !gui_fullscreen;
 380     if (gui_fullscreen) {
 381         SDL_GetWindowSize(scon->real_window,
 382                           &gui_saved_width, &gui_saved_height);
 383         gui_saved_scaling = scaling_active;
 384
 385         do_sdl_resize(scon, width, height, bpp);
 386         scaling_active = 0;
 387
 388         gui_saved_grab = gui_grab;
 389         sdl_grab_start(scon);
 390     } else {
 391         if (gui_saved_scaling) {
 392             sdl_scale(scon, gui_saved_width, gui_saved_height);
 393         } else {
 394             do_sdl_resize(scon, width, height, 0);
 395         }
 396         if (!gui_saved_grab) {
 397             sdl_grab_end(scon);
 398         }
 399     }
 400     graphic_hw_invalidate(scon->dcl.con);
 401     graphic_hw_update(scon->dcl.con);
 402 }
 403
 404 static void handle_keydown(SDL_Event *ev)
 405 {
 406     int mod_state, win;
 407     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 408
 409     if (alt_grab) {
 410         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 411             (gui_grab_code | KMOD_LSHIFT);
 412     } else if (ctrl_grab) {
 413         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 414     } else {
 415         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 416     }
 417     gui_key_modifier_pressed = mod_state;
 418
 419     if (gui_key_modifier_pressed) {
 420         switch (ev->key.keysym.scancode) {
 421         case SDL_SCANCODE_2:
 422         case SDL_SCANCODE_3:
 423         case SDL_SCANCODE_4:
 424         case SDL_SCANCODE_5:
 425         case SDL_SCANCODE_6:
 426         case SDL_SCANCODE_7:
 427         case SDL_SCANCODE_8:
 428         case SDL_SCANCODE_9:
 429             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 430             if (win < sdl2_num_outputs) {
 431                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 432                 if (sdl2_console[win].real_window) {
 433                     if (sdl2_console[win].hidden) {
 434                         SDL_HideWindow(sdl2_console[win].real_window);
 435                     } else {
 436                         SDL_ShowWindow(sdl2_console[win].real_window);
 437                     }
 438                 }
 439                 gui_keysym = 1;
 440             }
 441             break;
 442         case SDL_SCANCODE_F:
 443             toggle_full_screen(scon);
 444             gui_keysym = 1;
 445             break;
 446         case SDL_SCANCODE_U:
 447             if (scaling_active) {
 448                 scaling_active = 0;
 449                 sdl_switch(&scon->dcl, NULL);
 450                 graphic_hw_invalidate(scon->dcl.con);
 451                 graphic_hw_update(scon->dcl.con);
 452             }
 453             gui_keysym = 1;
 454             break;
 455         case SDL_SCANCODE_KP_PLUS:
 456         case SDL_SCANCODE_KP_MINUS:
 457             if (!gui_fullscreen) {
 458                 int scr_w, scr_h;
 459                 int width, height;
 460                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 461
 462                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 463                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 464                             160);
 465                 height = (surface_height(scon->surface) * width) /
 466                     surface_width(scon->surface);
 467
 468                 sdl_scale(scon, width, height);
 469                 graphic_hw_invalidate(NULL);
 470                 graphic_hw_update(NULL);
 471                 gui_keysym = 1;
 472             }
 473         default:
 474             break;
 475         }
 476     }
 477     if (!gui_keysym) {
 478         sdl2_process_key(scon, &ev->key);
 479     }
 480 }
 481
 482 static void handle_keyup(SDL_Event *ev)
 483 {
 484     int mod_state;
 485     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 486
 487     if (!alt_grab) {
 488         mod_state = (ev->key.keysym.mod & gui_grab_code);
 489     } else {
 490         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 491     }
 492     if (!mod_state && gui_key_modifier_pressed) {
 493         gui_key_modifier_pressed = 0;
 494         if (gui_keysym == 0) {
 495             /* exit/enter grab if pressing Ctrl-Alt */
 496             if (!gui_grab) {
 497                 sdl_grab_start(scon);
 498             } else if (!gui_fullscreen) {
 499                 sdl_grab_end(scon);
 500             }
 501             /* SDL does not send back all the modifiers key, so we must
 502              * correct it. */
 503             sdl2_reset_keys(scon);
 504             return;
 505         }
 506         gui_keysym = 0;
 507     }
 508     if (!gui_keysym) {
 509         sdl2_process_key(scon, &ev->key);
 510     }
 511 }
 512
 513 static void handle_textinput(SDL_Event *ev)
 514 {
 515     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 516     QemuConsole *con = scon ? scon->dcl.con : NULL;
 517
 518     if (qemu_console_is_graphic(con)) {
 519         return;
 520     }
 521     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 522 }
 523
 524 static void handle_mousemotion(SDL_Event *ev)
 525 {
 526     int max_x, max_y;
 527     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 528
 529     if (qemu_input_is_absolute() || absolute_enabled) {
 530         int scr_w, scr_h;
 531         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 532         max_x = scr_w - 1;
 533         max_y = scr_h - 1;
 534         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 535                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 536             sdl_grab_end(scon);
 537         }
 538         if (!gui_grab &&
 539             (ev->motion.x > 0 && ev->motion.x < max_x &&
 540              ev->motion.y > 0 && ev->motion.y < max_y)) {
 541             sdl_grab_start(scon);
 542         }
 543     }
 544     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 545         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 546                              ev->motion.x, ev->motion.y, ev->motion.state);
 547     }
 548 }
 549
 550 static void handle_mousebutton(SDL_Event *ev)
 551 {
 552     int buttonstate = SDL_GetMouseState(NULL, NULL);
 553     SDL_MouseButtonEvent *bev;
 554     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 555
 556     bev = &ev->button;
 557     if (!gui_grab && !qemu_input_is_absolute()) {
 558         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 559             /* start grabbing all events */
 560             sdl_grab_start(scon);
 561         }
 562     } else {
 563         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 564             buttonstate |= SDL_BUTTON(bev->button);
 565         } else {
 566             buttonstate &= ~SDL_BUTTON(bev->button);
 567         }
 568         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 569     }
 570 }
 571
 572 static void handle_mousewheel(SDL_Event *ev)
 573 {
 574     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 575     SDL_MouseWheelEvent *wev = &ev->wheel;
 576     InputButton btn;
 577
 578     if (wev->y > 0) {
 579         btn = INPUT_BUTTON_WHEEL_UP;
 580     } else if (wev->y < 0) {
 581         btn = INPUT_BUTTON_WHEEL_DOWN;
 582     } else {
 583         return;
 584     }
 585
 586     qemu_input_queue_btn(scon->dcl.con, btn, true);
 587     qemu_input_event_sync();
 588     qemu_input_queue_btn(scon->dcl.con, btn, false);
 589     qemu_input_event_sync();
 590 }
 591
 592 static void handle_windowevent(DisplayChangeListener *dcl, SDL_Event *ev)
 593 {
 594     int w, h;
 595     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 596
 597     switch (ev->window.event) {
 598     case SDL_WINDOWEVENT_RESIZED:
 599         sdl_scale(scon, ev->window.data1, ev->window.data2);
 600         {
 601             QemuUIInfo info;
 602             memset(&info, 0, sizeof(info));
 603             info.width = ev->window.data1;
 604             info.height = ev->window.data2;
 605             dpy_set_ui_info(scon->dcl.con, &info);
 606         }
 607         graphic_hw_invalidate(scon->dcl.con);
 608         graphic_hw_update(scon->dcl.con);
 609         break;
 610     case SDL_WINDOWEVENT_EXPOSED:
 611         SDL_GetWindowSize(SDL_GetWindowFromID(ev->window.windowID), &w, &h);
 612         sdl_update(dcl, 0, 0, w, h);
 613         break;
 614     case SDL_WINDOWEVENT_FOCUS_GAINED:
 615     case SDL_WINDOWEVENT_ENTER:
 616         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 617             absolute_mouse_grab(scon);
 618         }
 619         break;
 620     case SDL_WINDOWEVENT_FOCUS_LOST:
 621         if (gui_grab && !gui_fullscreen) {
 622             sdl_grab_end(scon);
 623         }
 624         break;
 625     case SDL_WINDOWEVENT_RESTORED:
 626         update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 627         break;
 628     case SDL_WINDOWEVENT_MINIMIZED:
 629         update_displaychangelistener(dcl, 500);
 630         break;
 631     case SDL_WINDOWEVENT_CLOSE:
 632         if (!no_quit) {
 633             no_shutdown = 0;
 634             qemu_system_shutdown_request();
 635         }
 636         break;
 637     }
 638 }
 639
 640 static void sdl_refresh(DisplayChangeListener *dcl)
 641 {
 642     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 643     SDL_Event ev1, *ev = &ev1;
 644
 645     if (scon->last_vm_running != runstate_is_running()) {
 646         scon->last_vm_running = runstate_is_running();
 647         sdl_update_caption(scon);
 648     }
 649
 650     graphic_hw_update(dcl->con);
 651
 652     while (SDL_PollEvent(ev)) {
 653         switch (ev->type) {
 654         case SDL_KEYDOWN:
 655             handle_keydown(ev);
 656             break;
 657         case SDL_KEYUP:
 658             handle_keyup(ev);
 659             break;
 660         case SDL_TEXTINPUT:
 661             handle_textinput(ev);
 662             break;
 663         case SDL_QUIT:
 664             if (!no_quit) {
 665                 no_shutdown = 0;
 666                 qemu_system_shutdown_request();
 667             }
 668             break;
 669         case SDL_MOUSEMOTION:
 670             handle_mousemotion(ev);
 671             break;
 672         case SDL_MOUSEBUTTONDOWN:
 673         case SDL_MOUSEBUTTONUP:
 674             handle_mousebutton(ev);
 675             break;
 676         case SDL_MOUSEWHEEL:
 677             handle_mousewheel(ev);
 678             break;
 679         case SDL_WINDOWEVENT:
 680             handle_windowevent(dcl, ev);
 681             break;
 682         default:
 683             break;
 684         }
 685     }
 686 }
 687
 688 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 689                            int x, int y, int on)
 690 {
 691     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 692     if (on) {
 693         if (!guest_cursor) {
 694             sdl_show_cursor();
 695         }
 696         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 697             SDL_SetCursor(guest_sprite);
 698             if (!qemu_input_is_absolute() && !absolute_enabled) {
 699                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 700             }
 701         }
 702     } else if (gui_grab) {
 703         sdl_hide_cursor();
 704     }
 705     guest_cursor = on;
 706     guest_x = x, guest_y = y;
 707 }
 708
 709 static void sdl_mouse_define(DisplayChangeListener *dcl,
 710                              QEMUCursor *c)
 711 {
 712
 713     if (guest_sprite) {
 714         SDL_FreeCursor(guest_sprite);
 715     }
 716
 717     if (guest_sprite_surface) {
 718         SDL_FreeSurface(guest_sprite_surface);
 719     }
 720
 721     guest_sprite_surface =
 722         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 723                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 724
 725     if (!guest_sprite_surface) {
 726         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 727         return;
 728     }
 729     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 730                                          c->hot_x, c->hot_y);
 731     if (!guest_sprite) {
 732         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 733         return;
 734     }
 735     if (guest_cursor &&
 736         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 737         SDL_SetCursor(guest_sprite);
 738     }
 739 }
 740
 741 static void sdl_cleanup(void)
 742 {
 743     if (guest_sprite) {
 744         SDL_FreeCursor(guest_sprite);
 745     }
 746     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 747 }
 748
 749 static const DisplayChangeListenerOps dcl_ops = {
 750     .dpy_name          = "sdl",
 751     .dpy_gfx_update    = sdl_update,
 752     .dpy_gfx_switch    = sdl_switch,
 753     .dpy_refresh       = sdl_refresh,
 754     .dpy_mouse_set     = sdl_mouse_warp,
 755     .dpy_cursor_define = sdl_mouse_define,
 756 };
 757
 758 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 759 {
 760     int flags;
 761     uint8_t data = 0;
 762     char *filename;
 763     int i;
 764
 765     if (no_frame) {
 766         gui_noframe = 1;
 767     }
 768
 769 #ifdef __linux__
 770     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 771      * accessible $DISPLAY to open X11 window.  This is often the case
 772      * when qemu is run using sudo.  But in this case, and when actually
 773      * run in X11 environment, SDL fights with X11 for the video card,
 774      * making current display unavailable, often until reboot.
 775      * So make x11 the default SDL video driver if this variable is unset.
 776      * This is a bit hackish but saves us from bigger problem.
 777      * Maybe it's a good idea to fix this in SDL instead.
 778      */
 779     setenv("SDL_VIDEODRIVER", "x11", 0);
 780 #endif
 781
 782     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 783     if (SDL_Init(flags)) {
 784         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 785                 SDL_GetError());
 786         exit(1);
 787     }
 788     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 789
 790     for (i = 0;; i++) {
 791         QemuConsole *con = qemu_console_lookup_by_index(i);
 792         if (!con) {
 793             break;
 794         }
 795     }
 796     sdl2_num_outputs = i;
 797     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 798     for (i = 0; i < sdl2_num_outputs; i++) {
 799         QemuConsole *con = qemu_console_lookup_by_index(i);
 800         if (!qemu_console_is_graphic(con)) {
 801             sdl2_console[i].hidden = true;
 802         }
 803         sdl2_console[i].dcl.ops = &dcl_ops;
 804         sdl2_console[i].dcl.con = con;
 805         register_displaychangelistener(&sdl2_console[i].dcl);
 806         sdl2_console[i].idx = i;
 807     }
 808
 809     /* Load a 32x32x4 image. White pixels are transparent. */
 810     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 811     if (filename) {
 812         SDL_Surface *image = SDL_LoadBMP(filename);
 813         if (image) {
 814             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 815             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 816             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 817         }
 818         g_free(filename);
 819     }
 820
 821     if (full_screen) {
 822         gui_fullscreen = 1;
 823         sdl_grab_start(0);
 824     }
 825
 826     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 827     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 828
 829     gui_grab = 0;
 830
 831     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 832     sdl_cursor_normal = SDL_GetCursor();
 833
 834     atexit(sdl_cleanup);
 835 }