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[sfnt] Reduce footprint if WOFF and WOFF2 support is not needed.

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Based on a patch from metarutaiga (MR !106).  The gist of this commit is
that it doesn't make sense to support WOFF without compression (which would
be only possible in WOFF 1.0 anyway).

* src/sfnt/sfobjs.c (sfnt_open_font): Guard WOFF code with
`FT_CONFIG_OPTION_USE_ZLIB` block.
Guard WOFF2 code with `FT_CONFIG_OPTION_USE_BROTLI` block.

* src/sfnt/sfwoff.c, src/sfnt/sfwoff.h: Guard files with
`FT_CONFIG_OPTION_USE_ZLIB` blocks, not parts of the code.

* src/sfnt/sfwoff2.c, src/sfnt/sfwoff2.h, src/sfnt/woff2tags.c,
src/sfnt/woff2tags.h: Guard files with `FT_CONFIG_OPTION_USE_BROTLI` blocks,
not parts of the code.

Fixes #1111.
This commit is contained in:
Werner Lemberg 2021-11-04 09:10:57 +01:00
parent bb4e049abe
commit 7ef266045f
7 changed files with 48 additions and 26 deletions
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13
src/sfnt/sfobjs.c
View File

@ -360,17 +360,27 @@
FT_FRAME_END
};
#ifndef FT_CONFIG_OPTION_USE_BROTLI
FT_UNUSED( face_instance_index );
FT_UNUSED( woff2_num_faces );
#endif
face->ttc_header.tag = 0;
face->ttc_header.version = 0;
face->ttc_header.count = 0;
#if defined( FTCONFIG_OPTION_USE_ZLIB ) || \
defined( FT_CONFIG_OPTION_USE_BROTLI )
retry:
#endif
offset = FT_STREAM_POS();
if ( FT_READ_ULONG( tag ) )
return error;
#ifdef FT_CONFIG_OPTION_USE_ZLIB
if ( tag == TTAG_wOFF )
{
FT_TRACE2(( "sfnt_open_font: file is a WOFF; synthesizing SFNT\n" ));
@ -386,7 +396,9 @@
stream = face->root.stream;
goto retry;
}
#endif
#ifdef FT_CONFIG_OPTION_USE_BROTLI
if ( tag == TTAG_wOF2 )
{
FT_TRACE2(( "sfnt_open_font: file is a WOFF2; synthesizing SFNT\n" ));
@ -405,6 +417,7 @@
stream = face->root.stream;
goto retry;
}
#endif
if ( tag != 0x00010000UL &&
tag != TTAG_ttcf &&

19
src/sfnt/sfwoff.c
View File

@ -23,6 +23,9 @@
#include <freetype/ftgzip.h>
#ifdef FT_CONFIG_OPTION_USE_ZLIB
/**************************************************************************
*
* The macro FT_COMPONENT is used in trace mode. It is an implicit
@ -360,8 +363,6 @@
}
else
{
#ifdef FT_CONFIG_OPTION_USE_ZLIB
/* Uncompress with zlib. */
FT_ULong output_len = table->OrigLength;
@ -377,13 +378,6 @@
error = FT_THROW( Invalid_Table );
goto Exit1;
}
#else /* !FT_CONFIG_OPTION_USE_ZLIB */
error = FT_THROW( Unimplemented_Feature );
goto Exit1;
#endif /* !FT_CONFIG_OPTION_USE_ZLIB */
}
FT_FRAME_EXIT();
@ -433,5 +427,12 @@
#undef WRITE_USHORT
#undef WRITE_ULONG
#else /* !FT_CONFIG_OPTION_USE_ZLIB */
/* ANSI C doesn't like empty source files */
typedef int _sfwoff_dummy;
#endif /* !FT_CONFIG_OPTION_USE_ZLIB */
/* END */

3
src/sfnt/sfwoff.h
View File

@ -26,12 +26,15 @@
FT_BEGIN_HEADER
#ifdef FT_CONFIG_OPTION_USE_ZLIB
FT_LOCAL( FT_Error )
woff_open_font( FT_Stream stream,
TT_Face face );
#endif
FT_END_HEADER
#endif /* SFWOFF_H_ */

23
src/sfnt/sfwoff2.c
View File

@ -26,8 +26,6 @@
#include <brotli/decode.h>
#endif
/**************************************************************************
*
@ -316,8 +314,6 @@
const FT_Byte* src,
FT_ULong src_size )
{
#ifdef FT_CONFIG_OPTION_USE_BROTLI
/* this cast is only of importance on 32bit systems; */
/* we don't validate it */
FT_Offset uncompressed_size = (FT_Offset)dst_size;
@ -338,18 +334,6 @@
FT_TRACE2(( "woff2_decompress: Brotli stream decompressed.\n" ));
return FT_Err_Ok;
#else /* !FT_CONFIG_OPTION_USE_BROTLI */
FT_UNUSED( dst );
FT_UNUSED( dst_size );
FT_UNUSED( src );
FT_UNUSED( src_size );
FT_ERROR(( "woff2_decompress: Brotli support not available.\n" ));
return FT_THROW( Unimplemented_Feature );
#endif /* !FT_CONFIG_OPTION_USE_BROTLI */
}
@ -2356,5 +2340,12 @@
#undef BBOX_STREAM
#undef INSTRUCTION_STREAM
#else /* !FT_CONFIG_OPTION_USE_BROTLI */
/* ANSI C doesn't like empty source files */
typedef int _sfwoff2_dummy;
#endif /* !FT_CONFIG_OPTION_USE_BROTLI */
/* END */

2
src/sfnt/sfwoff2.h
View File

@ -26,6 +26,7 @@
FT_BEGIN_HEADER
#ifdef FT_CONFIG_OPTION_USE_BROTLI
/* Leave the first byte open to store `flag_byte'. */
#define WOFF2_FLAGS_TRANSFORM 1 << 8
@ -66,6 +67,7 @@ FT_BEGIN_HEADER
FT_Int* face_index,
FT_Long* num_faces );
#endif /* FT_CONFIG_OPTION_USE_BROTLI */
FT_END_HEADER

10
src/sfnt/woff2tags.c
View File

@ -17,6 +17,9 @@
#include <freetype/tttags.h>
#ifdef FT_CONFIG_OPTION_USE_BROTLI
#include "woff2tags.h"
/*
@ -105,5 +108,12 @@
return known_tags[index];
}
#else /* !FT_CONFIG_OPTION_USE_BROTLI */
/* ANSI C doesn't like empty source files */
typedef int _woff2tags_dummy;
#endif /* !FT_CONFIG_OPTION_USE_BROTLI */
/* END */

4
src/sfnt/woff2tags.h
View File

@ -2,7 +2,7 @@
*
* woff2tags.h
*
* WOFFF2 Font table tags (specification).
* WOFF2 Font table tags (specification).
*
* Copyright (C) 2019-2021 by
* Nikhil Ramakrishnan, David Turner, Robert Wilhelm, and Werner Lemberg.
@ -26,10 +26,12 @@
FT_BEGIN_HEADER
#ifdef FT_CONFIG_OPTION_USE_BROTLI
FT_LOCAL( FT_Tag )
woff2_known_tags( FT_Byte index );
#endif
FT_END_HEADER