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

[Werner LEMBERG]

> 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.


    Werner


PS: Toshiya-san, please have a look at lines 5097f in file `ftobjs.c'.
    You introduced this in commit 2dc1079, but it seems to me that it
    doesn't work properly – it emits twice `failed to free some faces'
    for the example below, which doesn't seem appropriate.


======================================================================


#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_MULTIPLE_MASTERS_H


int
main(void)
{
  FT_Error error;
  FT_Library library;
  FT_Face face1, face2, face3;

  const char* filename1 = "arial.ttf";
  const char* filename2 = "pala.ttf";
  const char* filename3 = "symbol.ttf";

  error = FT_Init_FreeType(&library);
  if (error)
    goto Exit;
  error = FT_New_Face(library, filename1, 0, &face1);
  if (error)
    goto Exit1;
  error = FT_New_Face(library, filename2, 0, &face2);
  if (error)
    goto Exit1;
  error = FT_New_Face(library, filename3, 0, &face3);
  if (error)
    goto Exit1;

Exit1:
  FT_Done_FreeType(library);

Exit:
  return error;
}