Function JxlGainMapReadBundle 

pub unsafe extern "C-unwind" fn JxlGainMapReadBundle(
    map_bundle: *mut JxlGainMapBundle,
    input_buffer: *const u8,
    input_buffer_size: usize,
    bytes_read: *mut usize,
) -> JxlBool

Deserializes a gain map bundle from a provided buffer and populates a JxlGainMapBundle structure with the data extracted. This function assumes the buffer contains a valid serialized gain map bundle. After successful execution, the JxlGainMapBundle structure will reference three different sections within the buffer:

• gain_map_metadata
• alt_icc
• gain_map

These sections will be accompanied by their respective sizes. Users must ensure that the buffer remains valid as long as these pointers are in use.

Parameters

• map_bundle: Pointer to a preallocated JxlGainMapBundle where the deserialized data will be stored.
• input_buffer: Pointer to the buffer containing the serialized gain map bundle data.
• input_buffer_size: The size of the input buffer in bytes.
• bytes_read: The number of bytes read from the input buffer.

Returns

• A boolean indicating whether reading the bundle was successful.