The Tor Browser: modules/freetype2/docs/PROBLEMS@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 This  file describes various  problems that  have been  encountered in

     2 compiling,  installing  and   running  FreeType  2.   Suggestions  for

     3 additions or other improvements to this file are welcome.

     5 ----------------------------------------------------------------------

     7 Running Problems

     8 ================

    11 * Some Type 1, Multiple Masters, and CID-keyed PostScript fonts aren't

    12   handled correctly.

    14 -----

    16 Of course,  there might be  bugs in FreeType,  but some fonts based on

    17 the  PostScript  format can't  be handled indeed.  The reason  is that

    18 FreeType  doesn't contain a full  PostScript  interpreter  but applies

    19 pattern matching instead.  In case a font doesn't follow the  standard

    20 structure of the given font format, FreeType fails.  A typical example

    21 is Adobe's `Optima'  font family which  contains extra code  to switch

    22 between low and high resolution versions of the glyphs.

    24 It might be  possible to patch  FreeType in  some situations,  though.

    25 Please report failing fonts so that we investigate the problem and set

    26 up a list of such problematic fonts.

    29 * Why do identical FreeType  versions render differently  on different

    30   platforms?

    32 -----

    34 Different distributions compile FreeType with different options.   The

    35 developer  version of  a  distribution's  FreeType  package,  which is

    36 needed to compile  your program  against FreeType,  includes the  file

    37 ftoption.h.  Compare  each platform's  copy of ftoption.h to  find the

    38 differences.

    41 ----------------------------------------------------------------------

    44 Compilation Problems

    45 ====================

    48 * I get an `internal compilation error' (ICE) while compiling FreeType

    49   2.2.1 with Intel C++.

    51   This has been reported for the following compiler version:

    53     Intel(R) C++ Compiler for 32-bit applications,

    54       Version 9.0 Build 20050430Z Package ID: W_CC_P_9.0.019

    56 -----

    58 The best solution is to update the compiler to version

    60   Intel(R) C++ Compiler for 32-bit applications,

    61     Version 9.1 Build 20060323Z Package ID: W_CC_P_9.1.022

    63 or newer.  If this isn't feasible, apply the following patch.

    66 --- src/cache/ftcbasic.c 20 Mar 2006 12:10:24 -0000 1.20

    67 +++ src/cache/ftcbasic.c.patched 15 May 2006 02:51:02 -0000

    68 @@ -252,7 +252,7 @@

    69    */

    71    FT_CALLBACK_TABLE_DEF

    72 -  const FTC_IFamilyClassRec  ftc_basic_image_family_class =

    73 +  FTC_IFamilyClassRec  ftc_basic_image_family_class =

    74    {

    75      {

    76        sizeof ( FTC_BasicFamilyRec ),

    77 @@ -266,7 +266,7 @@

    80    FT_CALLBACK_TABLE_DEF

    81 -  const FTC_GCacheClassRec  ftc_basic_image_cache_class =

    82 +  FTC_GCacheClassRec  ftc_basic_image_cache_class =

    83    {

    84      {

    85        ftc_inode_new,

    88 ----------------------------------------------------------------------

    90 --- end of PROBLEMS ---

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