Function imgui_sys::ImFont_CalcTextSizeA

pub unsafe extern "C" fn ImFont_CalcTextSizeA(
    font: *const ImFont, 
    out: *mut ImVec2, 
    size: c_float, 
    max_width: c_float, 
    wrap_width: c_float, 
    text_begin: *const c_char, 
    text_end: *const c_char, 
    remaining: *mut *const c_char
)