Resets all static data within cairo to its original state, (ie. identical to the state at the time of program invocation). For example, all caches within cairo will be flushed empty. This function is intended to be useful when using memory-checking tools such as valgrind. When valgrind's memcheck analyzes a cairo-using program without a call to cairo_debug_reset_static_data(), it will report all data reachable via cairo's static objects as "still reachable". Calling cairo_debug_reset_static_data() just prior to program termination will make it easier to get squeaky clean reports from valgrind. WARNING: It is only safe to call this function when there are no active cairo objects remaining, (ie. the appropriate destroy functions have been called as necessary). If there are active cairo objects, this call is likely to cause a crash, (eg. an assertion failure due to a hash table being destroyed when non-empty). Since 1.0
Provides a human-readable description of a cairo_status_t. Since 1.0
Cairo uses a single status type to represent all kinds of errors. A status value of CAIRO_STATUS_SUCCESS represents no error and has an integer value of zero. All other status values represent an error.
Cairo's error handling is designed to be easy to use and safe. All major cairo objects retain an error status internally which can be queried anytime by the users using cairo*_status() calls. In the mean time, it is safe to call all cairo functions normally even if the underlying object is in an error status. This means that no error handling code is required before or after each individual cairo function call.