diff options
Diffstat (limited to 'freetype/src/truetype/ttgxvar.c')
| -rw-r--r-- | freetype/src/truetype/ttgxvar.c | 74 |
1 files changed, 40 insertions, 34 deletions
diff --git a/freetype/src/truetype/ttgxvar.c b/freetype/src/truetype/ttgxvar.c index 2126e000c..c395028e8 100644 --- a/freetype/src/truetype/ttgxvar.c +++ b/freetype/src/truetype/ttgxvar.c @@ -4,7 +4,7 @@ /* */ /* TrueType GX Font Variation loader */ /* */ -/* Copyright 2004, 2005, 2006, 2007, 2008 by */ +/* Copyright 2004, 2005, 2006, 2007, 2008, 2009 by */ /* David Turner, Robert Wilhelm, Werner Lemberg, and George Williams. */ /* */ /* This file is part of the FreeType project, and may only be used, */ @@ -16,30 +16,31 @@ /***************************************************************************/ -/***************************************************************************/ -/* */ -/* Apple documents the `fvar', `gvar', `cvar', and `avar' tables at */ -/* */ -/* http://developer.apple.com/fonts/TTRefMan/RM06/Chap6[fgca]var.html */ -/* */ -/* The documentation for `fvar' is inconsistent. At one point it says */ -/* that `countSizePairs' should be 3, at another point 2. It should be 2. */ -/* */ -/* The documentation for `gvar' is not intelligible; `cvar' refers you to */ -/* `gvar' and is thus also incomprehensible. */ -/* */ -/* The documentation for `avar' appears correct, but Apple has no fonts */ -/* with an `avar' table, so it is hard to test. */ -/* */ -/* Many thanks to John Jenkins (at Apple) in figuring this out. */ -/* */ -/* */ -/* Apple's `kern' table has some references to tuple indices, but as there */ -/* is no indication where these indices are defined, nor how to */ -/* interpolate the kerning values (different tuples have different */ -/* classes) this issue is ignored. */ -/* */ -/***************************************************************************/ + /*************************************************************************/ + /* */ + /* Apple documents the `fvar', `gvar', `cvar', and `avar' tables at */ + /* */ + /* http://developer.apple.com/fonts/TTRefMan/RM06/Chap6[fgca]var.html */ + /* */ + /* The documentation for `fvar' is inconsistent. At one point it says */ + /* that `countSizePairs' should be 3, at another point 2. It should */ + /* be 2. */ + /* */ + /* The documentation for `gvar' is not intelligible; `cvar' refers you */ + /* to `gvar' and is thus also incomprehensible. */ + /* */ + /* The documentation for `avar' appears correct, but Apple has no fonts */ + /* with an `avar' table, so it is hard to test. */ + /* */ + /* Many thanks to John Jenkins (at Apple) in figuring this out. */ + /* */ + /* */ + /* Apple's `kern' table has some references to tuple indices, but as */ + /* there is no indication where these indices are defined, nor how to */ + /* interpolate the kerning values (different tuples have different */ + /* classes) this issue is ignored. */ + /* */ + /*************************************************************************/ #include <ft2build.h> @@ -47,11 +48,9 @@ #include FT_CONFIG_CONFIG_H #include <freetype/internal/ftstream.h> #include <freetype/internal/sfnt.h> -#include FT_TRUETYPE_IDS_H #include FT_TRUETYPE_TAGS_H #include FT_MULTIPLE_MASTERS_H -#include "ttdriver.h" #include "ttpload.h" #include "ttgxvar.h" @@ -158,6 +157,9 @@ runcnt = runcnt & GX_PT_POINT_RUN_COUNT_MASK; first = points[i++] = FT_GET_USHORT(); + if ( runcnt < 1 ) + goto Exit; + /* first point not included in runcount */ for ( j = 0; j < runcnt; ++j ) points[i++] = (FT_UShort)( first += FT_GET_USHORT() ); @@ -166,11 +168,15 @@ { first = points[i++] = FT_GET_BYTE(); + if ( runcnt < 1 ) + goto Exit; + for ( j = 0; j < runcnt; ++j ) points[i++] = (FT_UShort)( first += FT_GET_BYTE() ); } } + Exit: return points; } @@ -205,12 +211,12 @@ /* */ static FT_Short* ft_var_readpackeddeltas( FT_Stream stream, - FT_Int delta_cnt ) + FT_Offset delta_cnt ) { FT_Short *deltas; FT_Int runcnt; - FT_Int i; - FT_Int j; + FT_Offset i; + FT_Offset j; FT_Memory memory = stream->memory; FT_Error error = TT_Err_Ok; @@ -1132,7 +1138,7 @@ if ( blend == NULL ) { - FT_TRACE2(( "no blend specified!\n" )); + FT_TRACE2(( "tt_face_vary_cvt: no blend specified\n" )); error = TT_Err_Ok; goto Exit; @@ -1140,7 +1146,7 @@ if ( face->cvt == NULL ) { - FT_TRACE2(( "no `cvt ' table!\n" )); + FT_TRACE2(( "tt_face_vary_cvt: no `cvt ' table\n" )); error = TT_Err_Ok; goto Exit; @@ -1149,7 +1155,7 @@ error = face->goto_table( face, TTAG_cvar, stream, &table_len ); if ( error ) { - FT_TRACE2(( "is missing!\n" )); + FT_TRACE2(( "is missing\n" )); error = TT_Err_Ok; goto Exit; @@ -1164,7 +1170,7 @@ table_start = FT_Stream_FTell( stream ); if ( FT_GET_LONG() != 0x00010000L ) { - FT_TRACE2(( "bad table version!\n" )); + FT_TRACE2(( "bad table version\n" )); error = TT_Err_Ok; goto FExit; |