summaryrefslogtreecommitdiffstats
path: root/ui/sdl2.c
blob: 5cb75aa364090aa5f1c90d3c8cea422c3c1ce548 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
/*
 * QEMU SDL display driver
 *
 * Copyright (c) 2003 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
/* Ported SDL 1.2 code to 2.0 by Dave Airlie. */

#include "qemu-common.h"
#include "ui/console.h"
#include "ui/input.h"
#include "ui/sdl2.h"
#include "sysemu/sysemu.h"

static int sdl2_num_outputs;
static struct sdl2_console *sdl2_console;

static SDL_Surface *guest_sprite_surface;
static int gui_grab; /* if true, all keyboard/mouse events are grabbed */

static int gui_saved_grab;
static int gui_fullscreen;
static int gui_noframe;
static int gui_key_modifier_pressed;
static int gui_keysym;
static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
static SDL_Cursor *sdl_cursor_normal;
static SDL_Cursor *sdl_cursor_hidden;
static int absolute_enabled;
static int guest_cursor;
static int guest_x, guest_y;
static SDL_Cursor *guest_sprite;
static Notifier mouse_mode_notifier;

static void sdl_update_caption(struct sdl2_console *scon);

static struct sdl2_console *get_scon_from_window(uint32_t window_id)
{
    int i;
    for (i = 0; i < sdl2_num_outputs; i++) {
        if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
            return &sdl2_console[i];
        }
    }
    return NULL;
}

void sdl2_window_create(struct sdl2_console *scon)
{
    int flags = 0;

    if (!scon->surface) {
        return;
    }
    assert(!scon->real_window);

    if (gui_fullscreen) {
        flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
    } else {
        flags |= SDL_WINDOW_RESIZABLE;
    }
    if (scon->hidden) {
        flags |= SDL_WINDOW_HIDDEN;
    }

    scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
                                         SDL_WINDOWPOS_UNDEFINED,
                                         surface_width(scon->surface),
                                         surface_height(scon->surface),
                                         flags);
    scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
    if (scon->opengl) {
        scon->winctx = SDL_GL_GetCurrentContext();
    }
    sdl_update_caption(scon);
}

void sdl2_window_destroy(struct sdl2_console *scon)
{
    if (!scon->real_window) {
        return;
    }

    SDL_DestroyRenderer(scon->real_renderer);
    scon->real_renderer = NULL;
    SDL_DestroyWindow(scon->real_window);
    scon->real_window = NULL;
}

void sdl2_window_resize(struct sdl2_console *scon)
{
    if (!scon->real_window) {
        return;
    }

    SDL_SetWindowSize(scon->real_window,
                      surface_width(scon->surface),
                      surface_height(scon->surface));
}

static void sdl2_redraw(struct sdl2_console *scon)
{
    if (scon->opengl) {
#ifdef CONFIG_OPENGL
        sdl2_gl_redraw(scon);
#endif
    } else {
        sdl2_2d_redraw(scon);
    }
}

static void sdl_update_caption(struct sdl2_console *scon)
{
    char win_title[1024];
    char icon_title[1024];
    const char *status = "";

    if (!runstate_is_running()) {
        status = " [Stopped]";
    } else if (gui_grab) {
        if (alt_grab) {
            status = " - Press Ctrl-Alt-Shift to exit grab";
        } else if (ctrl_grab) {
            status = " - Press Right-Ctrl to exit grab";
        } else {
            status = " - Press Ctrl-Alt to exit grab";
        }
    }

    if (qemu_name) {
        snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
                 scon->idx, status);
        snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
    } else {
        snprintf(win_title, sizeof(win_title), "QEMU%s", status);
        snprintf(icon_title, sizeof(icon_title), "QEMU");
    }

    if (scon->real_window) {
        SDL_SetWindowTitle(scon->real_window, win_title);
    }
}

static void sdl_hide_cursor(void)
{
    if (!cursor_hide) {
        return;
    }

    if (qemu_input_is_absolute()) {
        SDL_ShowCursor(1);
        SDL_SetCursor(sdl_cursor_hidden);
    } else {
        SDL_SetRelativeMouseMode(SDL_TRUE);
    }
}

static void sdl_show_cursor(void)
{
    if (!cursor_hide) {
        return;
    }

    if (!qemu_input_is_absolute()) {
        SDL_SetRelativeMouseMode(SDL_FALSE);
        SDL_ShowCursor(1);
        if (guest_cursor &&
            (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
            SDL_SetCursor(guest_sprite);
        } else {
            SDL_SetCursor(sdl_cursor_normal);
        }
    }
}

static void sdl_grab_start(struct sdl2_console *scon)
{
    QemuConsole *con = scon ? scon->dcl.con : NULL;

    if (!con || !qemu_console_is_graphic(con)) {
        return;
    }
    /*
     * If the application is not active, do not try to enter grab state. This
     * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
     * application (SDL bug).
     */
    if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
        return;
    }
    if (guest_cursor) {
        SDL_SetCursor(guest_sprite);
        if (!qemu_input_is_absolute() && !absolute_enabled) {
            SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
        }
    } else {
        sdl_hide_cursor();
    }
    SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
    gui_grab = 1;
    sdl_update_caption(scon);
}

static void sdl_grab_end(struct sdl2_console *scon)
{
    SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
    gui_grab = 0;
    sdl_show_cursor();
    sdl_update_caption(scon);
}

static void absolute_mouse_grab(struct sdl2_console *scon)
{
    int mouse_x, mouse_y;
    int scr_w, scr_h;
    SDL_GetMouseState(&mouse_x, &mouse_y);
    SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
    if (mouse_x > 0 && mouse_x < scr_w - 1 &&
        mouse_y > 0 && mouse_y < scr_h - 1) {
        sdl_grab_start(scon);
    }
}

static void sdl_mouse_mode_change(Notifier *notify, void *data)
{
    if (qemu_input_is_absolute()) {
        if (!absolute_enabled) {
            absolute_enabled = 1;
            absolute_mouse_grab(&sdl2_console[0]);
        }
    } else if (absolute_enabled) {
        if (!gui_fullscreen) {
            sdl_grab_end(&sdl2_console[0]);
        }
        absolute_enabled = 0;
    }
}

static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
                                 int x, int y, int state)
{
    static uint32_t bmap[INPUT_BUTTON_MAX] = {
        [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
        [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
        [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
    };
    static uint32_t prev_state;

    if (prev_state != state) {
        qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
        prev_state = state;
    }

    if (qemu_input_is_absolute()) {
        int scr_w, scr_h;
        int max_w = 0, max_h = 0;
        int off_x = 0, off_y = 0;
        int cur_off_x = 0, cur_off_y = 0;
        int i;

        for (i = 0; i < sdl2_num_outputs; i++) {
            struct sdl2_console *thiscon = &sdl2_console[i];
            if (thiscon->real_window && thiscon->surface) {
                SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
                cur_off_x = thiscon->x;
                cur_off_y = thiscon->y;
                if (scr_w + cur_off_x > max_w) {
                    max_w = scr_w + cur_off_x;
                }
                if (scr_h + cur_off_y > max_h) {
                    max_h = scr_h + cur_off_y;
                }
                if (i == scon->idx) {
                    off_x = cur_off_x;
                    off_y = cur_off_y;
                }
            }
        }
        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
    } else {
        if (guest_cursor) {
            x -= guest_x;
            y -= guest_y;
            guest_x += x;
            guest_y += y;
            dx = x;
            dy = y;
        }
        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
        qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
    }
    qemu_input_event_sync();
}

static void toggle_full_screen(struct sdl2_console *scon)
{
    gui_fullscreen = !gui_fullscreen;
    if (gui_fullscreen) {
        SDL_SetWindowFullscreen(scon->real_window,
                                SDL_WINDOW_FULLSCREEN_DESKTOP);
        gui_saved_grab = gui_grab;
        sdl_grab_start(scon);
    } else {
        if (!gui_saved_grab) {
            sdl_grab_end(scon);
        }
        SDL_SetWindowFullscreen(scon->real_window, 0);
    }
    sdl2_redraw(scon);
}

static void handle_keydown(SDL_Event *ev)
{
    int mod_state, win;
    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);

    if (alt_grab) {
        mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
            (gui_grab_code | KMOD_LSHIFT);
    } else if (ctrl_grab) {
        mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
    } else {
        mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
    }
    gui_key_modifier_pressed = mod_state;

    if (gui_key_modifier_pressed) {
        switch (ev->key.keysym.scancode) {
        case SDL_SCANCODE_2:
        case SDL_SCANCODE_3:
        case SDL_SCANCODE_4:
        case SDL_SCANCODE_5:
        case SDL_SCANCODE_6:
        case SDL_SCANCODE_7:
        case SDL_SCANCODE_8:
        case SDL_SCANCODE_9:
            win = ev->key.keysym.scancode - SDL_SCANCODE_1;
            if (win < sdl2_num_outputs) {
                sdl2_console[win].hidden = !sdl2_console[win].hidden;
                if (sdl2_console[win].real_window) {
                    if (sdl2_console[win].hidden) {
                        SDL_HideWindow(sdl2_console[win].real_window);
                    } else {
                        SDL_ShowWindow(sdl2_console[win].real_window);
                    }
                }
                gui_keysym = 1;
            }
            break;
        case SDL_SCANCODE_F:
            toggle_full_screen(scon);
            gui_keysym = 1;
            break;
        case SDL_SCANCODE_U:
            sdl2_window_destroy(scon);
            sdl2_window_create(scon);
            if (!scon->opengl) {
                /* re-create scon->texture */
                sdl2_2d_switch(&scon->dcl, scon->surface);
            }
            gui_keysym = 1;
            break;
#if 0
        case SDL_SCANCODE_KP_PLUS:
        case SDL_SCANCODE_KP_MINUS:
            if (!gui_fullscreen) {
                int scr_w, scr_h;
                int width, height;
                SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);

                width = MAX(scr_w + (ev->key.keysym.scancode ==
                                     SDL_SCANCODE_KP_PLUS ? 50 : -50),
                            160);
                height = (surface_height(scon->surface) * width) /
                    surface_width(scon->surface);
                fprintf(stderr, "%s: scale to %dx%d\n",
                        __func__, width, height);
                sdl_scale(scon, width, height);
                sdl2_redraw(scon);
                gui_keysym = 1;
            }
#endif
        default:
            break;
        }
    }
    if (!gui_keysym) {
        sdl2_process_key(scon, &ev->key);
    }
}

static void handle_keyup(SDL_Event *ev)
{
    int mod_state;
    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);

    if (!alt_grab) {
        mod_state = (ev->key.keysym.mod & gui_grab_code);
    } else {
        mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
    }
    if (!mod_state && gui_key_modifier_pressed) {
        gui_key_modifier_pressed = 0;
        if (gui_keysym == 0) {
            /* exit/enter grab if pressing Ctrl-Alt */
            if (!gui_grab) {
                sdl_grab_start(scon);
            } else if (!gui_fullscreen) {
                sdl_grab_end(scon);
            }
            /* SDL does not send back all the modifiers key, so we must
             * correct it. */
            sdl2_reset_keys(scon);
            return;
        }
        gui_keysym = 0;
    }
    if (!gui_keysym) {
        sdl2_process_key(scon, &ev->key);
    }
}

static void handle_textinput(SDL_Event *ev)
{
    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
    QemuConsole *con = scon ? scon->dcl.con : NULL;

    if (qemu_console_is_graphic(con)) {
        return;
    }
    kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
}

static void handle_mousemotion(SDL_Event *ev)
{
    int max_x, max_y;
    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);

    if (qemu_input_is_absolute() || absolute_enabled) {
        int scr_w, scr_h;
        SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
        max_x = scr_w - 1;
        max_y = scr_h - 1;
        if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
                         ev->motion.x == max_x || ev->motion.y == max_y)) {
            sdl_grab_end(scon);
        }
        if (!gui_grab &&
            (ev->motion.x > 0 && ev->motion.x < max_x &&
             ev->motion.y > 0 && ev->motion.y < max_y)) {
            sdl_grab_start(scon);
        }
    }
    if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
        sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
                             ev->motion.x, ev->motion.y, ev->motion.state);
    }
}

static void handle_mousebutton(SDL_Event *ev)
{
    int buttonstate = SDL_GetMouseState(NULL, NULL);
    SDL_MouseButtonEvent *bev;
    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);

    bev = &ev->button;
    if (!gui_grab && !qemu_input_is_absolute()) {
        if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
            /* start grabbing all events */
            sdl_grab_start(scon);
        }
    } else {
        if (ev->type == SDL_MOUSEBUTTONDOWN) {
            buttonstate |= SDL_BUTTON(bev->button);
        } else {
            buttonstate &= ~SDL_BUTTON(bev->button);
        }
        sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
    }
}

static void handle_mousewheel(SDL_Event *ev)
{
    struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
    SDL_MouseWheelEvent *wev = &ev->wheel;
    InputButton btn;

    if (wev->y > 0) {
        btn = INPUT_BUTTON_WHEEL_UP;
    } else if (wev->y < 0) {
        btn = INPUT_BUTTON_WHEEL_DOWN;
    } else {
        return;
    }

    qemu_input_queue_btn(scon->dcl.con, btn, true);
    qemu_input_event_sync();
    qemu_input_queue_btn(scon->dcl.con, btn, false);
    qemu_input_event_sync();
}

static void handle_windowevent(SDL_Event *ev)
{
    struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);

    if (!scon) {
        return;
    }

    switch (ev->window.event) {
    case SDL_WINDOWEVENT_RESIZED:
        {
            QemuUIInfo info;
            memset(&info, 0, sizeof(info));
            info.width = ev->window.data1;
            info.height = ev->window.data2;
            dpy_set_ui_info(scon->dcl.con, &info);
        }
        sdl2_redraw(scon);
        break;
    case SDL_WINDOWEVENT_EXPOSED:
        sdl2_redraw(scon);
        break;
    case SDL_WINDOWEVENT_FOCUS_GAINED:
    case SDL_WINDOWEVENT_ENTER:
        if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
            absolute_mouse_grab(scon);
        }
        break;
    case SDL_WINDOWEVENT_FOCUS_LOST:
        if (gui_grab && !gui_fullscreen) {
            sdl_grab_end(scon);
        }
        break;
    case SDL_WINDOWEVENT_RESTORED:
        update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
        break;
    case SDL_WINDOWEVENT_MINIMIZED:
        update_displaychangelistener(&scon->dcl, 500);
        break;
    case SDL_WINDOWEVENT_CLOSE:
        if (!no_quit) {
            no_shutdown = 0;
            qemu_system_shutdown_request();
        }
        break;
    case SDL_WINDOWEVENT_SHOWN:
        if (scon->hidden) {
            SDL_HideWindow(scon->real_window);
        }
        break;
    case SDL_WINDOWEVENT_HIDDEN:
        if (!scon->hidden) {
            SDL_ShowWindow(scon->real_window);
        }
        break;
    }
}

void sdl2_poll_events(struct sdl2_console *scon)
{
    SDL_Event ev1, *ev = &ev1;

    if (scon->last_vm_running != runstate_is_running()) {
        scon->last_vm_running = runstate_is_running();
        sdl_update_caption(scon);
    }

    while (SDL_PollEvent(ev)) {
        switch (ev->type) {
        case SDL_KEYDOWN:
            handle_keydown(ev);
            break;
        case SDL_KEYUP:
            handle_keyup(ev);
            break;
        case SDL_TEXTINPUT:
            handle_textinput(ev);
            break;
        case SDL_QUIT:
            if (!no_quit) {
                no_shutdown = 0;
                qemu_system_shutdown_request();
            }
            break;
        case SDL_MOUSEMOTION:
            handle_mousemotion(ev);
            break;
        case SDL_MOUSEBUTTONDOWN:
        case SDL_MOUSEBUTTONUP:
            handle_mousebutton(ev);
            break;
        case SDL_MOUSEWHEEL:
            handle_mousewheel(ev);
            break;
        case SDL_WINDOWEVENT:
            handle_windowevent(ev);
            break;
        default:
            break;
        }
    }
}

static void sdl_mouse_warp(DisplayChangeListener *dcl,
                           int x, int y, int on)
{
    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
    if (on) {
        if (!guest_cursor) {
            sdl_show_cursor();
        }
        if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
            SDL_SetCursor(guest_sprite);
            if (!qemu_input_is_absolute() && !absolute_enabled) {
                SDL_WarpMouseInWindow(scon->real_window, x, y);
            }
        }
    } else if (gui_grab) {
        sdl_hide_cursor();
    }
    guest_cursor = on;
    guest_x = x, guest_y = y;
}

static void sdl_mouse_define(DisplayChangeListener *dcl,
                             QEMUCursor *c)
{

    if (guest_sprite) {
        SDL_FreeCursor(guest_sprite);
    }

    if (guest_sprite_surface) {
        SDL_FreeSurface(guest_sprite_surface);
    }

    guest_sprite_surface =
        SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
                                 0xff0000, 0x00ff00, 0xff, 0xff000000);

    if (!guest_sprite_surface) {
        fprintf(stderr, "Failed to make rgb surface from %p\n", c);
        return;
    }
    guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
                                         c->hot_x, c->hot_y);
    if (!guest_sprite) {
        fprintf(stderr, "Failed to make color cursor from %p\n", c);
        return;
    }
    if (guest_cursor &&
        (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
        SDL_SetCursor(guest_sprite);
    }
}

static void sdl_cleanup(void)
{
    if (guest_sprite) {
        SDL_FreeCursor(guest_sprite);
    }
    SDL_QuitSubSystem(SDL_INIT_VIDEO);
}

static const DisplayChangeListenerOps dcl_2d_ops = {
    .dpy_name             = "sdl2-2d",
    .dpy_gfx_update       = sdl2_2d_update,
    .dpy_gfx_switch       = sdl2_2d_switch,
    .dpy_gfx_check_format = sdl2_2d_check_format,
    .dpy_refresh          = sdl2_2d_refresh,
    .dpy_mouse_set        = sdl_mouse_warp,
    .dpy_cursor_define    = sdl_mouse_define,
};

#ifdef CONFIG_OPENGL
static const DisplayChangeListenerOps dcl_gl_ops = {
    .dpy_name                = "sdl2-gl",
    .dpy_gfx_update          = sdl2_gl_update,
    .dpy_gfx_switch          = sdl2_gl_switch,
    .dpy_gfx_check_format    = console_gl_check_format,
    .dpy_refresh             = sdl2_gl_refresh,
    .dpy_mouse_set           = sdl_mouse_warp,
    .dpy_cursor_define       = sdl_mouse_define,
};
#endif

void sdl_display_early_init(int opengl)
{
    switch (opengl) {
    case -1: /* default */
    case 0:  /* off */
        break;
    case 1: /* on */
#ifdef CONFIG_OPENGL
        display_opengl = 1;
#endif
        break;
    default:
        g_assert_not_reached();
        break;
    }
}

void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
{
    int flags;
    uint8_t data = 0;
    char *filename;
    int i;

    if (no_frame) {
        gui_noframe = 1;
    }

#ifdef __linux__
    /* on Linux, SDL may use fbcon|directfb|svgalib when run without
     * accessible $DISPLAY to open X11 window.  This is often the case
     * when qemu is run using sudo.  But in this case, and when actually
     * run in X11 environment, SDL fights with X11 for the video card,
     * making current display unavailable, often until reboot.
     * So make x11 the default SDL video driver if this variable is unset.
     * This is a bit hackish but saves us from bigger problem.
     * Maybe it's a good idea to fix this in SDL instead.
     */
    setenv("SDL_VIDEODRIVER", "x11", 0);
#endif

    flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
    if (SDL_Init(flags)) {
        fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
                SDL_GetError());
        exit(1);
    }
    SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");

    for (i = 0;; i++) {
        QemuConsole *con = qemu_console_lookup_by_index(i);
        if (!con) {
            break;
        }
    }
    sdl2_num_outputs = i;
    sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
    for (i = 0; i < sdl2_num_outputs; i++) {
        QemuConsole *con = qemu_console_lookup_by_index(i);
        if (!qemu_console_is_graphic(con)) {
            sdl2_console[i].hidden = true;
        }
        sdl2_console[i].idx = i;
#ifdef CONFIG_OPENGL
        sdl2_console[i].opengl = display_opengl;
        sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
#else
        sdl2_console[i].opengl = 0;
        sdl2_console[i].dcl.ops = &dcl_2d_ops;
#endif
        sdl2_console[i].dcl.con = con;
        register_displaychangelistener(&sdl2_console[i].dcl);
    }

    /* Load a 32x32x4 image. White pixels are transparent. */
    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
    if (filename) {
        SDL_Surface *image = SDL_LoadBMP(filename);
        if (image) {
            uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
            SDL_SetColorKey(image, SDL_TRUE, colorkey);
            SDL_SetWindowIcon(sdl2_console[0].real_window, image);
        }
        g_free(filename);
    }

    if (full_screen) {
        gui_fullscreen = 1;
        sdl_grab_start(0);
    }

    mouse_mode_notifier.notify = sdl_mouse_mode_change;
    qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);

    gui_grab = 0;

    sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
    sdl_cursor_normal = SDL_GetCursor();

    atexit(sdl_cleanup);
}
OpenPOWER on IntegriCloud