qemu/ui/sdl2.c
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   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#include "qemu/osdep.h"
  27#include "qemu-common.h"
  28#include "ui/console.h"
  29#include "ui/input.h"
  30#include "ui/sdl2.h"
  31#include "sysemu/sysemu.h"
  32
  33static int sdl2_num_outputs;
  34static struct sdl2_console *sdl2_console;
  35
  36static SDL_Surface *guest_sprite_surface;
  37static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  38
  39static int gui_saved_grab;
  40static int gui_fullscreen;
  41static int gui_noframe;
  42static int gui_key_modifier_pressed;
  43static int gui_keysym;
  44static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  45static SDL_Cursor *sdl_cursor_normal;
  46static SDL_Cursor *sdl_cursor_hidden;
  47static int absolute_enabled;
  48static int guest_cursor;
  49static int guest_x, guest_y;
  50static SDL_Cursor *guest_sprite;
  51static Notifier mouse_mode_notifier;
  52
  53#define SDL2_REFRESH_INTERVAL_BUSY 10
  54#define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  55                             / SDL2_REFRESH_INTERVAL_BUSY + 1)
  56
  57static void sdl_update_caption(struct sdl2_console *scon);
  58
  59static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  60{
  61    int i;
  62    for (i = 0; i < sdl2_num_outputs; i++) {
  63        if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  64            return &sdl2_console[i];
  65        }
  66    }
  67    return NULL;
  68}
  69
  70void sdl2_window_create(struct sdl2_console *scon)
  71{
  72    int flags = 0;
  73
  74    if (!scon->surface) {
  75        return;
  76    }
  77    assert(!scon->real_window);
  78
  79    if (gui_fullscreen) {
  80        flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  81    } else {
  82        flags |= SDL_WINDOW_RESIZABLE;
  83    }
  84    if (scon->hidden) {
  85        flags |= SDL_WINDOW_HIDDEN;
  86    }
  87
  88    scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  89                                         SDL_WINDOWPOS_UNDEFINED,
  90                                         surface_width(scon->surface),
  91                                         surface_height(scon->surface),
  92                                         flags);
  93    scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  94    if (scon->opengl) {
  95        scon->winctx = SDL_GL_GetCurrentContext();
  96    }
  97    sdl_update_caption(scon);
  98}
  99
 100void sdl2_window_destroy(struct sdl2_console *scon)
 101{
 102    if (!scon->real_window) {
 103        return;
 104    }
 105
 106    SDL_DestroyRenderer(scon->real_renderer);
 107    scon->real_renderer = NULL;
 108    SDL_DestroyWindow(scon->real_window);
 109    scon->real_window = NULL;
 110}
 111
 112void sdl2_window_resize(struct sdl2_console *scon)
 113{
 114    if (!scon->real_window) {
 115        return;
 116    }
 117
 118    SDL_SetWindowSize(scon->real_window,
 119                      surface_width(scon->surface),
 120                      surface_height(scon->surface));
 121}
 122
 123static void sdl2_redraw(struct sdl2_console *scon)
 124{
 125    if (scon->opengl) {
 126#ifdef CONFIG_OPENGL
 127        sdl2_gl_redraw(scon);
 128#endif
 129    } else {
 130        sdl2_2d_redraw(scon);
 131    }
 132}
 133
 134static void sdl_update_caption(struct sdl2_console *scon)
 135{
 136    char win_title[1024];
 137    char icon_title[1024];
 138    const char *status = "";
 139
 140    if (!runstate_is_running()) {
 141        status = " [Stopped]";
 142    } else if (gui_grab) {
 143        if (alt_grab) {
 144            status = " - Press Ctrl-Alt-Shift to exit grab";
 145        } else if (ctrl_grab) {
 146            status = " - Press Right-Ctrl to exit grab";
 147        } else {
 148            status = " - Press Ctrl-Alt to exit grab";
 149        }
 150    }
 151
 152    if (qemu_name) {
 153        snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 154                 scon->idx, status);
 155        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 156    } else {
 157        snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 158        snprintf(icon_title, sizeof(icon_title), "QEMU");
 159    }
 160
 161    if (scon->real_window) {
 162        SDL_SetWindowTitle(scon->real_window, win_title);
 163    }
 164}
 165
 166static void sdl_hide_cursor(void)
 167{
 168    if (!cursor_hide) {
 169        return;
 170    }
 171
 172    if (qemu_input_is_absolute()) {
 173        SDL_ShowCursor(1);
 174        SDL_SetCursor(sdl_cursor_hidden);
 175    } else {
 176        SDL_SetRelativeMouseMode(SDL_TRUE);
 177    }
 178}
 179
 180static void sdl_show_cursor(void)
 181{
 182    if (!cursor_hide) {
 183        return;
 184    }
 185
 186    if (!qemu_input_is_absolute()) {
 187        SDL_SetRelativeMouseMode(SDL_FALSE);
 188        SDL_ShowCursor(1);
 189        if (guest_cursor &&
 190            (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 191            SDL_SetCursor(guest_sprite);
 192        } else {
 193            SDL_SetCursor(sdl_cursor_normal);
 194        }
 195    }
 196}
 197
 198static void sdl_grab_start(struct sdl2_console *scon)
 199{
 200    QemuConsole *con = scon ? scon->dcl.con : NULL;
 201
 202    if (!con || !qemu_console_is_graphic(con)) {
 203        return;
 204    }
 205    /*
 206     * If the application is not active, do not try to enter grab state. This
 207     * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 208     * application (SDL bug).
 209     */
 210    if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 211        return;
 212    }
 213    if (guest_cursor) {
 214        SDL_SetCursor(guest_sprite);
 215        if (!qemu_input_is_absolute() && !absolute_enabled) {
 216            SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 217        }
 218    } else {
 219        sdl_hide_cursor();
 220    }
 221    SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 222    gui_grab = 1;
 223    sdl_update_caption(scon);
 224}
 225
 226static void sdl_grab_end(struct sdl2_console *scon)
 227{
 228    SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 229    gui_grab = 0;
 230    sdl_show_cursor();
 231    sdl_update_caption(scon);
 232}
 233
 234static void absolute_mouse_grab(struct sdl2_console *scon)
 235{
 236    int mouse_x, mouse_y;
 237    int scr_w, scr_h;
 238    SDL_GetMouseState(&mouse_x, &mouse_y);
 239    SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 240    if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 241        mouse_y > 0 && mouse_y < scr_h - 1) {
 242        sdl_grab_start(scon);
 243    }
 244}
 245
 246static void sdl_mouse_mode_change(Notifier *notify, void *data)
 247{
 248    if (qemu_input_is_absolute()) {
 249        if (!absolute_enabled) {
 250            absolute_enabled = 1;
 251            absolute_mouse_grab(&sdl2_console[0]);
 252        }
 253    } else if (absolute_enabled) {
 254        if (!gui_fullscreen) {
 255            sdl_grab_end(&sdl2_console[0]);
 256        }
 257        absolute_enabled = 0;
 258    }
 259}
 260
 261static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 262                                 int x, int y, int state)
 263{
 264    static uint32_t bmap[INPUT_BUTTON__MAX] = {
 265        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 266        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 267        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 268    };
 269    static uint32_t prev_state;
 270
 271    if (prev_state != state) {
 272        qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 273        prev_state = state;
 274    }
 275
 276    if (qemu_input_is_absolute()) {
 277        int scr_w, scr_h;
 278        int max_w = 0, max_h = 0;
 279        int off_x = 0, off_y = 0;
 280        int cur_off_x = 0, cur_off_y = 0;
 281        int i;
 282
 283        for (i = 0; i < sdl2_num_outputs; i++) {
 284            struct sdl2_console *thiscon = &sdl2_console[i];
 285            if (thiscon->real_window && thiscon->surface) {
 286                SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 287                cur_off_x = thiscon->x;
 288                cur_off_y = thiscon->y;
 289                if (scr_w + cur_off_x > max_w) {
 290                    max_w = scr_w + cur_off_x;
 291                }
 292                if (scr_h + cur_off_y > max_h) {
 293                    max_h = scr_h + cur_off_y;
 294                }
 295                if (i == scon->idx) {
 296                    off_x = cur_off_x;
 297                    off_y = cur_off_y;
 298                }
 299            }
 300        }
 301        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 302        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 303    } else {
 304        if (guest_cursor) {
 305            x -= guest_x;
 306            y -= guest_y;
 307            guest_x += x;
 308            guest_y += y;
 309            dx = x;
 310            dy = y;
 311        }
 312        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 313        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 314    }
 315    qemu_input_event_sync();
 316}
 317
 318static void toggle_full_screen(struct sdl2_console *scon)
 319{
 320    gui_fullscreen = !gui_fullscreen;
 321    if (gui_fullscreen) {
 322        SDL_SetWindowFullscreen(scon->real_window,
 323                                SDL_WINDOW_FULLSCREEN_DESKTOP);
 324        gui_saved_grab = gui_grab;
 325        sdl_grab_start(scon);
 326    } else {
 327        if (!gui_saved_grab) {
 328            sdl_grab_end(scon);
 329        }
 330        SDL_SetWindowFullscreen(scon->real_window, 0);
 331    }
 332    sdl2_redraw(scon);
 333}
 334
 335static void handle_keydown(SDL_Event *ev)
 336{
 337    int mod_state, win;
 338    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 339
 340    if (alt_grab) {
 341        mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 342            (gui_grab_code | KMOD_LSHIFT);
 343    } else if (ctrl_grab) {
 344        mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 345    } else {
 346        mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 347    }
 348    gui_key_modifier_pressed = mod_state;
 349
 350    if (gui_key_modifier_pressed) {
 351        switch (ev->key.keysym.scancode) {
 352        case SDL_SCANCODE_2:
 353        case SDL_SCANCODE_3:
 354        case SDL_SCANCODE_4:
 355        case SDL_SCANCODE_5:
 356        case SDL_SCANCODE_6:
 357        case SDL_SCANCODE_7:
 358        case SDL_SCANCODE_8:
 359        case SDL_SCANCODE_9:
 360            if (gui_grab) {
 361                sdl_grab_end(scon);
 362            }
 363
 364            win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 365            if (win < sdl2_num_outputs) {
 366                sdl2_console[win].hidden = !sdl2_console[win].hidden;
 367                if (sdl2_console[win].real_window) {
 368                    if (sdl2_console[win].hidden) {
 369                        SDL_HideWindow(sdl2_console[win].real_window);
 370                    } else {
 371                        SDL_ShowWindow(sdl2_console[win].real_window);
 372                    }
 373                }
 374                gui_keysym = 1;
 375            }
 376            break;
 377        case SDL_SCANCODE_F:
 378            toggle_full_screen(scon);
 379            gui_keysym = 1;
 380            break;
 381        case SDL_SCANCODE_U:
 382            sdl2_window_destroy(scon);
 383            sdl2_window_create(scon);
 384            if (!scon->opengl) {
 385                /* re-create scon->texture */
 386                sdl2_2d_switch(&scon->dcl, scon->surface);
 387            }
 388            gui_keysym = 1;
 389            break;
 390#if 0
 391        case SDL_SCANCODE_KP_PLUS:
 392        case SDL_SCANCODE_KP_MINUS:
 393            if (!gui_fullscreen) {
 394                int scr_w, scr_h;
 395                int width, height;
 396                SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 397
 398                width = MAX(scr_w + (ev->key.keysym.scancode ==
 399                                     SDL_SCANCODE_KP_PLUS ? 50 : -50),
 400                            160);
 401                height = (surface_height(scon->surface) * width) /
 402                    surface_width(scon->surface);
 403                fprintf(stderr, "%s: scale to %dx%d\n",
 404                        __func__, width, height);
 405                sdl_scale(scon, width, height);
 406                sdl2_redraw(scon);
 407                gui_keysym = 1;
 408            }
 409#endif
 410        default:
 411            break;
 412        }
 413    }
 414    if (!gui_keysym) {
 415        sdl2_process_key(scon, &ev->key);
 416    }
 417}
 418
 419static void handle_keyup(SDL_Event *ev)
 420{
 421    int mod_state;
 422    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 423
 424    if (!alt_grab) {
 425        mod_state = (ev->key.keysym.mod & gui_grab_code);
 426    } else {
 427        mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 428    }
 429    if (!mod_state && gui_key_modifier_pressed) {
 430        gui_key_modifier_pressed = 0;
 431        if (gui_keysym == 0) {
 432            /* exit/enter grab if pressing Ctrl-Alt */
 433            if (!gui_grab) {
 434                sdl_grab_start(scon);
 435            } else if (!gui_fullscreen) {
 436                sdl_grab_end(scon);
 437            }
 438            /* SDL does not send back all the modifiers key, so we must
 439             * correct it. */
 440            sdl2_reset_keys(scon);
 441            return;
 442        }
 443        gui_keysym = 0;
 444    }
 445    if (!gui_keysym) {
 446        sdl2_process_key(scon, &ev->key);
 447    }
 448}
 449
 450static void handle_textinput(SDL_Event *ev)
 451{
 452    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 453    QemuConsole *con = scon ? scon->dcl.con : NULL;
 454
 455    if (qemu_console_is_graphic(con)) {
 456        return;
 457    }
 458    kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 459}
 460
 461static void handle_mousemotion(SDL_Event *ev)
 462{
 463    int max_x, max_y;
 464    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 465
 466    if (qemu_input_is_absolute() || absolute_enabled) {
 467        int scr_w, scr_h;
 468        SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 469        max_x = scr_w - 1;
 470        max_y = scr_h - 1;
 471        if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 472                         ev->motion.x == max_x || ev->motion.y == max_y)) {
 473            sdl_grab_end(scon);
 474        }
 475        if (!gui_grab &&
 476            (ev->motion.x > 0 && ev->motion.x < max_x &&
 477             ev->motion.y > 0 && ev->motion.y < max_y)) {
 478            sdl_grab_start(scon);
 479        }
 480    }
 481    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 482        sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 483                             ev->motion.x, ev->motion.y, ev->motion.state);
 484    }
 485}
 486
 487static void handle_mousebutton(SDL_Event *ev)
 488{
 489    int buttonstate = SDL_GetMouseState(NULL, NULL);
 490    SDL_MouseButtonEvent *bev;
 491    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 492
 493    bev = &ev->button;
 494    if (!gui_grab && !qemu_input_is_absolute()) {
 495        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 496            /* start grabbing all events */
 497            sdl_grab_start(scon);
 498        }
 499    } else {
 500        if (ev->type == SDL_MOUSEBUTTONDOWN) {
 501            buttonstate |= SDL_BUTTON(bev->button);
 502        } else {
 503            buttonstate &= ~SDL_BUTTON(bev->button);
 504        }
 505        sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 506    }
 507}
 508
 509static void handle_mousewheel(SDL_Event *ev)
 510{
 511    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 512    SDL_MouseWheelEvent *wev = &ev->wheel;
 513    InputButton btn;
 514
 515    if (wev->y > 0) {
 516        btn = INPUT_BUTTON_WHEEL_UP;
 517    } else if (wev->y < 0) {
 518        btn = INPUT_BUTTON_WHEEL_DOWN;
 519    } else {
 520        return;
 521    }
 522
 523    qemu_input_queue_btn(scon->dcl.con, btn, true);
 524    qemu_input_event_sync();
 525    qemu_input_queue_btn(scon->dcl.con, btn, false);
 526    qemu_input_event_sync();
 527}
 528
 529static void handle_windowevent(SDL_Event *ev)
 530{
 531    struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 532
 533    if (!scon) {
 534        return;
 535    }
 536
 537    switch (ev->window.event) {
 538    case SDL_WINDOWEVENT_RESIZED:
 539        {
 540            QemuUIInfo info;
 541            memset(&info, 0, sizeof(info));
 542            info.width = ev->window.data1;
 543            info.height = ev->window.data2;
 544            dpy_set_ui_info(scon->dcl.con, &info);
 545        }
 546        sdl2_redraw(scon);
 547        break;
 548    case SDL_WINDOWEVENT_EXPOSED:
 549        sdl2_redraw(scon);
 550        break;
 551    case SDL_WINDOWEVENT_FOCUS_GAINED:
 552    case SDL_WINDOWEVENT_ENTER:
 553        if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 554            absolute_mouse_grab(scon);
 555        }
 556        break;
 557    case SDL_WINDOWEVENT_FOCUS_LOST:
 558        if (gui_grab && !gui_fullscreen) {
 559            sdl_grab_end(scon);
 560        }
 561        break;
 562    case SDL_WINDOWEVENT_RESTORED:
 563        update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 564        break;
 565    case SDL_WINDOWEVENT_MINIMIZED:
 566        update_displaychangelistener(&scon->dcl, 500);
 567        break;
 568    case SDL_WINDOWEVENT_CLOSE:
 569        if (!no_quit) {
 570            no_shutdown = 0;
 571            qemu_system_shutdown_request();
 572        }
 573        break;
 574    case SDL_WINDOWEVENT_SHOWN:
 575        if (scon->hidden) {
 576            SDL_HideWindow(scon->real_window);
 577        }
 578        break;
 579    case SDL_WINDOWEVENT_HIDDEN:
 580        if (!scon->hidden) {
 581            SDL_ShowWindow(scon->real_window);
 582        }
 583        break;
 584    }
 585}
 586
 587void sdl2_poll_events(struct sdl2_console *scon)
 588{
 589    SDL_Event ev1, *ev = &ev1;
 590    int idle = 1;
 591
 592    if (scon->last_vm_running != runstate_is_running()) {
 593        scon->last_vm_running = runstate_is_running();
 594        sdl_update_caption(scon);
 595    }
 596
 597    while (SDL_PollEvent(ev)) {
 598        switch (ev->type) {
 599        case SDL_KEYDOWN:
 600            idle = 0;
 601            handle_keydown(ev);
 602            break;
 603        case SDL_KEYUP:
 604            idle = 0;
 605            handle_keyup(ev);
 606            break;
 607        case SDL_TEXTINPUT:
 608            idle = 0;
 609            handle_textinput(ev);
 610            break;
 611        case SDL_QUIT:
 612            if (!no_quit) {
 613                no_shutdown = 0;
 614                qemu_system_shutdown_request();
 615            }
 616            break;
 617        case SDL_MOUSEMOTION:
 618            idle = 0;
 619            handle_mousemotion(ev);
 620            break;
 621        case SDL_MOUSEBUTTONDOWN:
 622        case SDL_MOUSEBUTTONUP:
 623            idle = 0;
 624            handle_mousebutton(ev);
 625            break;
 626        case SDL_MOUSEWHEEL:
 627            idle = 0;
 628            handle_mousewheel(ev);
 629            break;
 630        case SDL_WINDOWEVENT:
 631            handle_windowevent(ev);
 632            break;
 633        default:
 634            break;
 635        }
 636    }
 637
 638    if (idle) {
 639        if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 640            scon->idle_counter++;
 641            if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 642                scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 643            }
 644        }
 645    } else {
 646        scon->idle_counter = 0;
 647        scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 648    }
 649}
 650
 651static void sdl_mouse_warp(DisplayChangeListener *dcl,
 652                           int x, int y, int on)
 653{
 654    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 655    if (on) {
 656        if (!guest_cursor) {
 657            sdl_show_cursor();
 658        }
 659        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 660            SDL_SetCursor(guest_sprite);
 661            if (!qemu_input_is_absolute() && !absolute_enabled) {
 662                SDL_WarpMouseInWindow(scon->real_window, x, y);
 663            }
 664        }
 665    } else if (gui_grab) {
 666        sdl_hide_cursor();
 667    }
 668    guest_cursor = on;
 669    guest_x = x, guest_y = y;
 670}
 671
 672static void sdl_mouse_define(DisplayChangeListener *dcl,
 673                             QEMUCursor *c)
 674{
 675
 676    if (guest_sprite) {
 677        SDL_FreeCursor(guest_sprite);
 678    }
 679
 680    if (guest_sprite_surface) {
 681        SDL_FreeSurface(guest_sprite_surface);
 682    }
 683
 684    guest_sprite_surface =
 685        SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 686                                 0xff0000, 0x00ff00, 0xff, 0xff000000);
 687
 688    if (!guest_sprite_surface) {
 689        fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 690        return;
 691    }
 692    guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 693                                         c->hot_x, c->hot_y);
 694    if (!guest_sprite) {
 695        fprintf(stderr, "Failed to make color cursor from %p\n", c);
 696        return;
 697    }
 698    if (guest_cursor &&
 699        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 700        SDL_SetCursor(guest_sprite);
 701    }
 702}
 703
 704static void sdl_cleanup(void)
 705{
 706    if (guest_sprite) {
 707        SDL_FreeCursor(guest_sprite);
 708    }
 709    SDL_QuitSubSystem(SDL_INIT_VIDEO);
 710}
 711
 712static const DisplayChangeListenerOps dcl_2d_ops = {
 713    .dpy_name             = "sdl2-2d",
 714    .dpy_gfx_update       = sdl2_2d_update,
 715    .dpy_gfx_switch       = sdl2_2d_switch,
 716    .dpy_gfx_check_format = sdl2_2d_check_format,
 717    .dpy_refresh          = sdl2_2d_refresh,
 718    .dpy_mouse_set        = sdl_mouse_warp,
 719    .dpy_cursor_define    = sdl_mouse_define,
 720};
 721
 722#ifdef CONFIG_OPENGL
 723static const DisplayChangeListenerOps dcl_gl_ops = {
 724    .dpy_name                = "sdl2-gl",
 725    .dpy_gfx_update          = sdl2_gl_update,
 726    .dpy_gfx_switch          = sdl2_gl_switch,
 727    .dpy_gfx_check_format    = console_gl_check_format,
 728    .dpy_refresh             = sdl2_gl_refresh,
 729    .dpy_mouse_set           = sdl_mouse_warp,
 730    .dpy_cursor_define       = sdl_mouse_define,
 731
 732    .dpy_gl_ctx_create       = sdl2_gl_create_context,
 733    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 734    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 735    .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 736    .dpy_gl_scanout          = sdl2_gl_scanout,
 737    .dpy_gl_update           = sdl2_gl_scanout_flush,
 738};
 739#endif
 740
 741void sdl_display_early_init(int opengl)
 742{
 743    switch (opengl) {
 744    case -1: /* default */
 745    case 0:  /* off */
 746        break;
 747    case 1: /* on */
 748#ifdef CONFIG_OPENGL
 749        display_opengl = 1;
 750#endif
 751        break;
 752    default:
 753        g_assert_not_reached();
 754        break;
 755    }
 756}
 757
 758void 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].idx = i;
 804#ifdef CONFIG_OPENGL
 805        sdl2_console[i].opengl = display_opengl;
 806        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 807#else
 808        sdl2_console[i].opengl = 0;
 809        sdl2_console[i].dcl.ops = &dcl_2d_ops;
 810#endif
 811        sdl2_console[i].dcl.con = con;
 812        register_displaychangelistener(&sdl2_console[i].dcl);
 813    }
 814
 815    /* Load a 32x32x4 image. White pixels are transparent. */
 816    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 817    if (filename) {
 818        SDL_Surface *image = SDL_LoadBMP(filename);
 819        if (image) {
 820            uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 821            SDL_SetColorKey(image, SDL_TRUE, colorkey);
 822            SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 823        }
 824        g_free(filename);
 825    }
 826
 827    if (full_screen) {
 828        gui_fullscreen = 1;
 829        sdl_grab_start(0);
 830    }
 831
 832    mouse_mode_notifier.notify = sdl_mouse_mode_change;
 833    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 834
 835    gui_grab = 0;
 836
 837    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 838    sdl_cursor_normal = SDL_GetCursor();
 839
 840    atexit(sdl_cleanup);
 841}
 842