Atlas - SDL_wscons_mouse.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21
22#include "SDL_internal.h"
23#include <sys/time.h>
24#include <dev/wscons/wsconsio.h>
25#include <unistd.h>
26#include <sys/ioctl.h>
27#include <stdlib.h>
28#include <fcntl.h>
29
30#include "../../events/SDL_mouse_c.h"
31
32typedef struct SDL_WSCONS_mouse_input_data
33{
34    int fd;
35    SDL_MouseID mouseID;
36} SDL_WSCONS_mouse_input_data;
37
38SDL_WSCONS_mouse_input_data *SDL_WSCONS_Init_Mouse(void)
39{
40#ifdef WSMOUSEIO_SETVERSION
41    int version = WSMOUSE_EVENT_VERSION;
42#endif
43    SDL_WSCONS_mouse_input_data *input = SDL_calloc(1, sizeof(SDL_WSCONS_mouse_input_data));
44
45    if (!input) {
46        return NULL;
47    }
48    input->fd = open("/dev/wsmouse", O_RDWR | O_NONBLOCK | O_CLOEXEC);
49    if (input->fd == -1) {
50        SDL_free(input);
51        return NULL;
52    }
53
54    input->mouseID = SDL_GetNextObjectID();
55    SDL_AddMouse(input->mouseID, NULL);
56
57#ifdef WSMOUSEIO_SETMODE
58    ioctl(input->fd, WSMOUSEIO_SETMODE, WSMOUSE_COMPAT);
59#endif
60#ifdef WSMOUSEIO_SETVERSION
61    ioctl(input->fd, WSMOUSEIO_SETVERSION, &version);
62#endif
63    return input;
64}
65
66static Uint64 GetEventTimestamp(struct timespec *time)
67{
68    // FIXME: Get the event time in the SDL tick time base
69    return SDL_GetTicksNS();
70}
71
72void updateMouse(SDL_WSCONS_mouse_input_data *input)
73{
74    struct wscons_event events[64];
75    int n;
76    SDL_Mouse *mouse = SDL_GetMouse();
77
78    if ((n = read(input->fd, events, sizeof(events))) > 0) {
79        int i;
80        n /= sizeof(struct wscons_event);
81        for (i = 0; i < n; i++) {
82            Uint64 timestamp = GetEventTimestamp(&events[i].time);
83            int type = events[i].type;
84            switch (type) {
85            case WSCONS_EVENT_MOUSE_DOWN:
86            case WSCONS_EVENT_MOUSE_UP:
87            {
88                Uint8 button = SDL_BUTTON_LEFT + events[i].value;
89                bool down = (type == WSCONS_EVENT_MOUSE_DOWN);
90                SDL_SendMouseButton(timestamp, mouse->focus, input->mouseID, button, down);
91                break;
92            }
93            case WSCONS_EVENT_MOUSE_DELTA_X:
94            {
95                SDL_SendMouseMotion(timestamp, mouse->focus, input->mouseID, true, (float)events[i].value, 0.0f);
96                break;
97            }
98            case WSCONS_EVENT_MOUSE_DELTA_Y:
99            {
100                SDL_SendMouseMotion(timestamp, mouse->focus, input->mouseID, true, 0.0f, -(float)events[i].value);
101                break;
102            }
103            case WSCONS_EVENT_MOUSE_DELTA_W:
104            {
105                SDL_SendMouseWheel(timestamp, mouse->focus, input->mouseID, events[i].value, 0, SDL_MOUSEWHEEL_NORMAL);
106                break;
107            }
108            case WSCONS_EVENT_MOUSE_DELTA_Z:
109            {
110                SDL_SendMouseWheel(timestamp, mouse->focus, input->mouseID, 0, -events[i].value, SDL_MOUSEWHEEL_NORMAL);
111                break;
112            }
113            default:
114                break;
115            }
116        }
117    }
118}
119
120void SDL_WSCONS_Quit_Mouse(SDL_WSCONS_mouse_input_data *input)
121{
122    if (!input) {
123        return;
124    }
125    close(input->fd);
126    SDL_free(input);
127}
128
[FILE END]
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