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* src/sfnt/ttload.c (tt_face_load_sfnt_header): Reject face_index 

values > 0 if loading non-TTC fonts.

* src/base/ftmac.c (open_face_from_buffer): Set positive face_index
to zero before calling FT_Open_Face.

* docs/CHANGES: Updated.
This commit is contained in:
Werner Lemberg 2004-03-20 14:26:38 +00:00
parent 79edf077a2
commit 02d1e62410
5 changed files with 44 additions and 14 deletions
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10
ChangeLog
View File

@ -1,3 +1,13 @@
2004-03-19 Steve Hartwell <shspamsink@comcast.net>
* src/sfnt/ttload.c (tt_face_load_sfnt_header): Reject face_index
values > 0 if loading non-TTC fonts.
* src/base/ftmac.c (open_face_from_buffer): Set positive face_index
to zero before calling FT_Open_Face.
* docs/CHANGES: Updated.
2004-03-04 Werner Lemberg <wl@gnu.org>
* Jamfile, vms_make.com, builds/win32/visualc/freetype.dsp,

3
docs/CHANGES
View File

@ -140,6 +140,9 @@ LATEST CHANGES BETWEEN 2.1.8 and 2.1.7
- The demo programs have been updated to the new code. The
previous versions will not work with the current one.
- Using an invalid face index in FT_Open_Face and friends now
causes an error even if the font contains a single face only.
III. MISCELLANEOUS

23
include/freetype/freetype.h
View File

@ -768,10 +768,12 @@ FT_BEGIN_HEADER
/* collection (i.e., a file which embeds */
/* several faces), this is the total number of */
/* faces found in the resource. 1 by default. */
/* Accessing non-existent face indices causes */
/* an error. */
/* */
/* face_index :: The index of the face in its font file. */
/* Usually, this is 0 for all normal font */
/* formats. It can be more in the case of */
/* formats. It can be > 0 in the case of */
/* collections (which embed several fonts in a */
/* single resource/file). */
/* */
@ -1749,6 +1751,7 @@ FT_BEGIN_HEADER
/* */
/* face_index :: The index of the face within the resource. The */
/* first face has index 0. */
/* */
/* <Output> */
/* aface :: A handle to a new face object. */
/* */
@ -1762,9 +1765,9 @@ FT_BEGIN_HEADER
/* */
/* @FT_New_Face can be used to determine and/or check the font format */
/* of a given font resource. If the `face_index' field is negative, */
/* the function will _not_ return any face handle in `aface'. Its */
/* return value should be 0 if the font format is recognized, or */
/* non-zero otherwise. */
/* the function will _not_ return any face handle in `aface'; the */
/* return value is 0 if the font format is recognized, or non-zero */
/* otherwise. */
/* */
/* Each new face object created with this function also owns a */
/* default @FT_Size object, accessible as `face->size'. */
@ -1795,6 +1798,7 @@ FT_BEGIN_HEADER
/* */
/* face_index :: The index of the face within the resource. The */
/* first face has index 0. */
/* */
/* <Output> */
/* aface :: A handle to a new face object. */
/* */
@ -1814,8 +1818,8 @@ FT_BEGIN_HEADER
/* @FT_New_Memory_Face can be used to determine and/or check the font */
/* format of a given font resource. If the `face_index' field is */
/* negative, the function will _not_ return any face handle in */
/* `aface'. Its return value should be 0 if the font format is */
/* recognized, or non-zero otherwise. */
/* `aface'; the return value is 0 if the font format is recognized, */
/* or non-zero otherwise. */
/* */
FT_EXPORT( FT_Error )
FT_New_Memory_Face( FT_Library library,
@ -1844,6 +1848,7 @@ FT_BEGIN_HEADER
/* */
/* face_index :: The index of the face within the resource. The */
/* first face has index 0. */
/* */
/* <Output> */
/* aface :: A handle to a new face object. */
/* */
@ -1855,11 +1860,11 @@ FT_BEGIN_HEADER
/* slot for the face object which can be accessed directly through */
/* `face->glyph'. */
/* */
/* @FT_Open_Face can be used to determine and/or check the font */
/* @FT_Open_Face can be used to determine and/or check the font */
/* format of a given font resource. If the `face_index' field is */
/* negative, the function will _not_ return any face handle in */
/* `*face'. Its return value should be 0 if the font format is */
/* recognized, or non-zero otherwise. */
/* `*face'; the return value is 0 if the font format is recognized, */
/* or non-zero otherwise. */
/* */
FT_EXPORT( FT_Error )
FT_Open_Face( FT_Library library,

8
src/base/ftmac.c
View File

@ -611,6 +611,14 @@
args.driver = FT_Get_Module( library, driver_name );
}
/* At this point, face_index has served its purpose; */
/* whoever calls this function has already used it to */
/* locate the correct font data. We should not propagate */
/* this index to FT_Open_Face() (unless it is negative). */
if ( face_index > 0 )
face_index = 0;
error = FT_Open_Face( library, &args, face_index, aface );
if ( error == FT_Err_Ok )
(*aface)->face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM;

14
src/sfnt/ttload.c
View File

@ -253,7 +253,7 @@
/* stream :: The input stream. */
/* */
/* face_index :: If the font is a collection, the number of the font */
/* in the collection, ignored otherwise. */
/* in the collection. Must be zero otherwise. */
/* */
/* <Output> */
/* sfnt :: The SFNT header. */
@ -313,10 +313,9 @@
face->num_tables = 0;
/* first of all, read the first 4 bytes. If it is `ttcf', then the */
/* file is a TrueType collection, otherwise it can be any other */
/* kind of font. */
/* */
/* First of all, read the first 4 bytes. If it is `ttcf', then the */
/* file is a TrueType collection, otherwise it is a single-face font. */
/* */
offset = FT_STREAM_POS();
if ( FT_READ_ULONG( format_tag ) )
@ -358,6 +357,11 @@
FT_READ_LONG( format_tag ) )
goto Exit;
}
else if ( face_index > 0 )
{
error = SFNT_Err_Bad_Argument;
goto Exit;
}
/* the format tag was read, now check the rest of the header */
sfnt->format_tag = format_tag;