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Added SDL_hid_get_properties()

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This commit is contained in:
Sam Lantinga
2025-08-27 15:11:08 -07:00
parent 09ca7e8f64
commit 65c1fc1b42
2 changed files with 36 additions and 3 deletions
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17
include/SDL3/SDL_hidapi.h
View File

@@ -283,6 +283,23 @@ extern SDL_DECLSPEC SDL_hid_device * SDLCALL SDL_hid_open(unsigned short vendor_
*/
extern SDL_DECLSPEC SDL_hid_device * SDLCALL SDL_hid_open_path(const char *path);
/**
* Get the properties associated with an SDL_hid_device.
*
* The following read-only properties are provided by SDL:
*
* - `SDL_PROP_HIDAPI_LIBUSB_DEVICE_HANDLE_POINTER`: the libusb_device_handle associated with the device, if it was opened using libusb.
*
* \param dev a device handle returned from SDL_hid_open().
* \returns a valid property ID on success or 0 on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.4.0.
*/
extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_hid_get_properties(SDL_hid_device *dev);
#define SDL_PROP_HIDAPI_LIBUSB_DEVICE_HANDLE_POINTER "SDL.hidapi.libusb.device.handle"
/**
* Write an Output report to a HID device.
*

22
src/hidapi/SDL_hidapi.c
View File

@@ -960,13 +960,14 @@ struct SDL_hid_device
void *device;
const struct hidapi_backend *backend;
SDL_hid_device_info info;
SDL_PropertiesID props;
};
#if defined(HAVE_PLATFORM_BACKEND) || defined(HAVE_DRIVER_BACKEND) || defined(HAVE_LIBUSB)
static SDL_hid_device *CreateHIDDeviceWrapper(void *device, const struct hidapi_backend *backend)
{
SDL_hid_device *wrapper = (SDL_hid_device *)SDL_malloc(sizeof(*wrapper));
SDL_hid_device *wrapper = (SDL_hid_device *)SDL_calloc(1, sizeof(*wrapper));
SDL_SetObjectValid(wrapper, SDL_OBJECT_TYPE_HIDAPI_DEVICE, true);
wrapper->device = device;
wrapper->backend = backend;
@@ -1433,7 +1434,9 @@ SDL_hid_device *SDL_hid_open(unsigned short vendor_id, unsigned short product_id
if (libusb_ctx) {
pDevice = LIBUSB_hid_open(vendor_id, product_id, serial_number);
if (pDevice != NULL) {
return CreateHIDDeviceWrapper(pDevice, &LIBUSB_Backend);
SDL_hid_device *dev = CreateHIDDeviceWrapper(pDevice, &LIBUSB_Backend);
SDL_SetPointerProperty(SDL_hid_get_properties(dev), SDL_PROP_HIDAPI_LIBUSB_DEVICE_HANDLE_POINTER, ((LIBUSB_hid_device *)pDevice)->device_handle);
return dev;
}
}
#endif // HAVE_LIBUSB
@@ -1472,7 +1475,9 @@ SDL_hid_device *SDL_hid_open_path(const char *path)
if (libusb_ctx) {
pDevice = LIBUSB_hid_open_path(path);
if (pDevice != NULL) {
return CreateHIDDeviceWrapper(pDevice, &LIBUSB_Backend);
SDL_hid_device *dev = CreateHIDDeviceWrapper(pDevice, &LIBUSB_Backend);
SDL_SetPointerProperty(SDL_hid_get_properties(dev), SDL_PROP_HIDAPI_LIBUSB_DEVICE_HANDLE_POINTER, ((LIBUSB_hid_device *)pDevice)->device_handle);
return dev;
}
}
#endif // HAVE_LIBUSB
@@ -1482,6 +1487,16 @@ SDL_hid_device *SDL_hid_open_path(const char *path)
return NULL;
}
SDL_PropertiesID SDL_hid_get_properties(SDL_hid_device *device)
{
CHECK_DEVICE_MAGIC(device, 0);
if (!device->props) {
device->props = SDL_CreateProperties();
}
return device->props;
}
int SDL_hid_write(SDL_hid_device *device, const unsigned char *data, size_t length)
{
CHECK_DEVICE_MAGIC(device, -1);
@@ -1536,6 +1551,7 @@ int SDL_hid_close(SDL_hid_device *device)
CHECK_DEVICE_MAGIC(device, -1);
device->backend->hid_close(device->device);
SDL_DestroyProperties(device->props);
DeleteHIDDeviceWrapper(device);
return 0;
}