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Add the ability to get per-platform information for joypads.

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This adds the ability for games to obtain platform-specific information about joypads such as their vendor/product ID, their XInput gamepad index or the real name of the device before it gets swapped out by the gamecontrollerdb's name.

This PR also includes a rebased version of #76045, this is because this PR is intended to be mainly to help people implementing Steam Input, as having the gamepad index is essential.
This commit is contained in:
Álex Román Núñez 2023-06-21 22:57:15 +02:00
parent a7583881af
commit 3aa340d081
5 changed files with 52 additions and 4 deletions
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25
platform/linuxbsd/joypad_linux.cpp
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@ -56,6 +56,14 @@
static const char *ignore_str = "/dev/input/js";
#endif
// On Linux with Steam Input Xbox 360 devices have an index appended to their device name, this index is
// the Steam Input gamepad index
#define VALVE_GAMEPAD_NAME_PREFIX "Microsoft X-Box 360 pad "
// IDs used by Steam Input virtual controllers.
// See https://partner.steamgames.com/doc/features/steam_controller/steam_input_gamepad_emulation_bestpractices
#define VALVE_GAMEPAD_VID 0x28DE
#define VALVE_GAMEPAD_PID 0x11FF
JoypadLinux::Joypad::~Joypad() {
for (int i = 0; i < MAX_ABS; i++) {
if (abs_info[i]) {
@ -411,8 +419,23 @@ void JoypadLinux::open_joypad(const char *p_path) {
setup_joypad_properties(joypad);
sprintf(uid, "%04x%04x", BSWAP16(inpid.bustype), 0);
if (inpid.vendor && inpid.product && inpid.version) {
Dictionary joypad_info;
joypad_info["vendor_id"] = inpid.vendor;
joypad_info["product_id"] = inpid.product;
joypad_info["raw_name"] = name;
sprintf(uid + String(uid).length(), "%04x%04x%04x%04x%04x%04x", vendor, 0, product, 0, version, 0);
input->joy_connection_changed(joy_num, true, name, uid);
if (inpid.vendor == VALVE_GAMEPAD_VID && inpid.product == VALVE_GAMEPAD_PID) {
if (name.begins_with(VALVE_GAMEPAD_NAME_PREFIX)) {
String idx_str = name.substr(strlen(VALVE_GAMEPAD_NAME_PREFIX));
if (idx_str.is_valid_int()) {
joypad_info["steam_input_index"] = idx_str.to_int();
}
}
}
input->joy_connection_changed(joy_num, true, name, uid, joypad_info);
} else {
String uidname = uid;
int uidlen = MIN(name.length(), 11);