Re: [ft] Does FT_Done_FreeType() call FT_Done_Face() on all open faces?

[Andreas Falkenhahn]

On 16.08.2017 at 07:17 Werner LEMBERG wrote:


>> The documentation of FT_Done_FreeType() says:

>>     Destroy a given FreeType library object and all of its children,
>>     including resources, drivers, faces, sizes, etc.

>> So let's suppose there is a sloppy program which doesn't call
>> FT_Done_Face() on every face it opened using FT_New_Face().  Will
>> FT_Done_FreeType() automatically call FT_Done_Face() for every face
>> still open in that case?

> Yes.

>> From my observations this doesn't seem to be the case with a
>> snapshot version of freetype 2.5.4 currently used by me although the
>> doc makes it sound like it will do it.

> Really?  I tried the small test program below, and everything gets
> freed properly.  However, it seems that you have a more specific
> problem, so please provide a similar code snippet that exhibits your
> issue.

Ok, I debugged it and cairo was the culprit. It is leaking memory 
unless you call cairo_debug_reset_static_data(). If you don't call
cairo_debug_reset_static_data() then FT_Done_FreeType() is never
called by cairo and some faces remain open.

-- 
Best regards,
 Andreas Falkenhahn                            mailto:address@hidden