ref: e9c50fa77de58b749b4b95706f7b55bfff0dd27f
dir: /docs/PROBLEMS/
This file describes various problems that have been encountered in
compiling, installing and running FreeType 2. Suggestions for
additions or other improvements to this file are welcome.
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Running Problems
================
* Some Type 1, Multiple Masters, and CID-keyed PostScript fonts aren't
handled correctly.
-----
Of course, there might be bugs in FreeType, but some fonts based on
the PostScript format can't be handled indeed. The reason is that
FreeType doesn't contain a full PostScript interpreter but applies
pattern matching instead. In case a font doesn't follow the standard
structure of the given font format, FreeType fails. A typical example
is Adobe's `Optima' font family which contains extra code to switch
between low and high resolution versions of the glyphs.
It might be possible to patch FreeType in some situations, though.
Please report failing fonts so that we investigate the problem and set
up a list of such problematic fonts.
* Why do identical FreeType versions render differently on different
platforms?
-----
Different distributions compile FreeType with different options. The
developer version of a distribution's FreeType package, which is
needed to compile your program against FreeType, includes the file
ftoption.h. Compare each platform's copy of ftoption.h to find the
differences.
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Compilation Problems
====================
* I get an `internal compilation error' (ICE) while compiling FreeType
2.2.1 with Intel C++.
This has been reported for the following compiler version:
Intel(R) C++ Compiler for 32-bit applications,
Version 9.0 Build 20050430Z Package ID: W_CC_P_9.0.019
-----
The best solution is to update the compiler to version
Intel(R) C++ Compiler for 32-bit applications,
Version 9.1 Build 20060323Z Package ID: W_CC_P_9.1.022
or newer. If this isn't feasible, apply the following patch.
--- src/cache/ftcbasic.c 20 Mar 2006 12:10:24 -0000 1.20
+++ src/cache/ftcbasic.c.patched 15 May 2006 02:51:02 -0000
@@ -252,7 +252,7 @@
*/
FT_CALLBACK_TABLE_DEF
- const FTC_IFamilyClassRec ftc_basic_image_family_class =
+ FTC_IFamilyClassRec ftc_basic_image_family_class =
{
{
sizeof ( FTC_BasicFamilyRec ),
@@ -266,7 +266,7 @@
FT_CALLBACK_TABLE_DEF
- const FTC_GCacheClassRec ftc_basic_image_cache_class =
+ FTC_GCacheClassRec ftc_basic_image_cache_class =
{
{
ftc_inode_new,
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--- end of PROBLEMS ---