Atlas - SDL_hidapi_combined.c
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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// This driver supports the Nintendo Switch Joy-Cons pair controllers
22#include "SDL_internal.h"
23
24#ifdef SDL_JOYSTICK_HIDAPI
25
26#include "SDL_hidapijoystick_c.h"
27#include "../SDL_sysjoystick.h"
28
29static void HIDAPI_DriverCombined_RegisterHints(SDL_HintCallback callback, void *userdata)
30{
31}
32
33static void HIDAPI_DriverCombined_UnregisterHints(SDL_HintCallback callback, void *userdata)
34{
35}
36
37static bool HIDAPI_DriverCombined_IsEnabled(void)
38{
39    return true;
40}
41
42static bool HIDAPI_DriverCombined_IsSupportedDevice(SDL_HIDAPI_Device *device, const char *name, SDL_GamepadType type, Uint16 vendor_id, Uint16 product_id, Uint16 version, int interface_number, int interface_class, int interface_subclass, int interface_protocol)
43{
44    // This is always explicitly created for combined devices
45    return false;
46}
47
48static bool HIDAPI_DriverCombined_InitDevice(SDL_HIDAPI_Device *device)
49{
50    return HIDAPI_JoystickConnected(device, NULL);
51}
52
53static int HIDAPI_DriverCombined_GetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id)
54{
55    return -1;
56}
57
58static void HIDAPI_DriverCombined_SetDevicePlayerIndex(SDL_HIDAPI_Device *device, SDL_JoystickID instance_id, int player_index)
59{
60}
61
62static bool HIDAPI_DriverCombined_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
63{
64    int i;
65    char *serial = NULL, *new_serial;
66    size_t serial_length = 0, new_length;
67
68    SDL_AssertJoysticksLocked();
69
70    for (i = 0; i < device->num_children; ++i) {
71        SDL_HIDAPI_Device *child = device->children[i];
72        if (!child->driver->OpenJoystick(child, joystick)) {
73            child->broken = true;
74
75            while (i-- > 0) {
76                child = device->children[i];
77                child->driver->CloseJoystick(child, joystick);
78            }
79            SDL_free(serial);
80            return false;
81        }
82
83        // Extend the serial number with the child serial number
84        if (joystick->serial) {
85            new_length = serial_length + 1 + SDL_strlen(joystick->serial);
86            new_serial = (char *)SDL_realloc(serial, new_length);
87            if (new_serial) {
88                if (serial) {
89                    SDL_strlcat(new_serial, ",", new_length);
90                    SDL_strlcat(new_serial, joystick->serial, new_length);
91                } else {
92                    SDL_strlcpy(new_serial, joystick->serial, new_length);
93                }
94                serial = new_serial;
95                serial_length = new_length;
96            }
97            SDL_free(joystick->serial);
98            joystick->serial = NULL;
99        }
100    }
101
102    // Update the joystick with the combined serial numbers
103    SDL_free(joystick->serial);
104    joystick->serial = serial;
105
106    return true;
107}
108
109static bool HIDAPI_DriverCombined_RumbleJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble)
110{
111    int i;
112    bool result = false;
113
114    for (i = 0; i < device->num_children; ++i) {
115        SDL_HIDAPI_Device *child = device->children[i];
116        if (child->driver->RumbleJoystick(child, joystick, low_frequency_rumble, high_frequency_rumble)) {
117            result = true;
118        }
119    }
120    return result;
121}
122
123static bool HIDAPI_DriverCombined_RumbleJoystickTriggers(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint16 left_rumble, Uint16 right_rumble)
124{
125    int i;
126    bool result = false;
127
128    for (i = 0; i < device->num_children; ++i) {
129        SDL_HIDAPI_Device *child = device->children[i];
130        if (child->driver->RumbleJoystickTriggers(child, joystick, left_rumble, right_rumble)) {
131            result = true;
132        }
133    }
134    return result;
135}
136
137static Uint32 HIDAPI_DriverCombined_GetJoystickCapabilities(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
138{
139    int i;
140    Uint32 caps = 0;
141
142    for (i = 0; i < device->num_children; ++i) {
143        SDL_HIDAPI_Device *child = device->children[i];
144        caps |= child->driver->GetJoystickCapabilities(child, joystick);
145    }
146    return caps;
147}
148
149static bool HIDAPI_DriverCombined_SetJoystickLED(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, Uint8 red, Uint8 green, Uint8 blue)
150{
151    int i;
152    bool result = false;
153
154    for (i = 0; i < device->num_children; ++i) {
155        SDL_HIDAPI_Device *child = device->children[i];
156        if (child->driver->SetJoystickLED(child, joystick, red, green, blue)) {
157            result = true;
158        }
159    }
160    return result;
161}
162
163static bool HIDAPI_DriverCombined_SendJoystickEffect(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, const void *data, int size)
164{
165    return SDL_Unsupported();
166}
167
168static bool HIDAPI_DriverCombined_SetJoystickSensorsEnabled(SDL_HIDAPI_Device *device, SDL_Joystick *joystick, bool enabled)
169{
170    int i;
171    bool result = false;
172
173    for (i = 0; i < device->num_children; ++i) {
174        SDL_HIDAPI_Device *child = device->children[i];
175        if (child->driver->SetJoystickSensorsEnabled(child, joystick, enabled)) {
176            result = true;
177        }
178    }
179    return result;
180}
181
182static bool HIDAPI_DriverCombined_UpdateDevice(SDL_HIDAPI_Device *device)
183{
184    int i;
185    int result = true;
186
187    for (i = 0; i < device->num_children; ++i) {
188        SDL_HIDAPI_Device *child = device->children[i];
189        if (!child->driver->UpdateDevice(child)) {
190            result = false;
191        }
192    }
193    return result;
194}
195
196static void HIDAPI_DriverCombined_CloseJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joystick)
197{
198    int i;
199
200    for (i = 0; i < device->num_children; ++i) {
201        SDL_HIDAPI_Device *child = device->children[i];
202        child->driver->CloseJoystick(child, joystick);
203    }
204}
205
206static void HIDAPI_DriverCombined_FreeDevice(SDL_HIDAPI_Device *device)
207{
208}
209
210SDL_HIDAPI_DeviceDriver SDL_HIDAPI_DriverCombined = {
211    "SDL_JOYSTICK_HIDAPI_COMBINED",
212    true,
213    HIDAPI_DriverCombined_RegisterHints,
214    HIDAPI_DriverCombined_UnregisterHints,
215    HIDAPI_DriverCombined_IsEnabled,
216    HIDAPI_DriverCombined_IsSupportedDevice,
217    HIDAPI_DriverCombined_InitDevice,
218    HIDAPI_DriverCombined_GetDevicePlayerIndex,
219    HIDAPI_DriverCombined_SetDevicePlayerIndex,
220    HIDAPI_DriverCombined_UpdateDevice,
221    HIDAPI_DriverCombined_OpenJoystick,
222    HIDAPI_DriverCombined_RumbleJoystick,
223    HIDAPI_DriverCombined_RumbleJoystickTriggers,
224    HIDAPI_DriverCombined_GetJoystickCapabilities,
225    HIDAPI_DriverCombined_SetJoystickLED,
226    HIDAPI_DriverCombined_SendJoystickEffect,
227    HIDAPI_DriverCombined_SetJoystickSensorsEnabled,
228    HIDAPI_DriverCombined_CloseJoystick,
229    HIDAPI_DriverCombined_FreeDevice,
230};
231
232#endif // SDL_JOYSTICK_HIDAPI
233
[FILE END]
(C) 2025 0x4248
(C) 2025 4248 Media and 4248 Systems, All part of 0x4248
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