summaryrefslogtreecommitdiff
path: root/Build/source/libs/freetype2/freetype-src/src/sfnt/sfwoff2.c
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/libs/freetype2/freetype-src/src/sfnt/sfwoff2.c')
-rw-r--r--Build/source/libs/freetype2/freetype-src/src/sfnt/sfwoff2.c70
1 files changed, 55 insertions, 15 deletions
diff --git a/Build/source/libs/freetype2/freetype-src/src/sfnt/sfwoff2.c b/Build/source/libs/freetype2/freetype-src/src/sfnt/sfwoff2.c
index 5ee8dea28a7..b2855b8e72b 100644
--- a/Build/source/libs/freetype2/freetype-src/src/sfnt/sfwoff2.c
+++ b/Build/source/libs/freetype2/freetype-src/src/sfnt/sfwoff2.c
@@ -4,7 +4,7 @@
*
* WOFF2 format management (base).
*
- * Copyright (C) 2019-2021 by
+ * Copyright (C) 2019-2022 by
* Nikhil Ramakrishnan, David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
@@ -84,6 +84,8 @@
#define BBOX_STREAM 5
#define INSTRUCTION_STREAM 6
+#define HAVE_OVERLAP_SIMPLE_BITMAP 0x1
+
static void
stream_close( FT_Stream stream )
@@ -94,7 +96,6 @@
FT_FREE( stream->base );
stream->size = 0;
- stream->base = NULL;
stream->close = NULL;
}
@@ -523,6 +524,7 @@
const WOFF2_Point points,
FT_UShort n_contours,
FT_UShort instruction_len,
+ FT_Bool have_overlap,
FT_Byte* dst,
FT_ULong dst_size,
FT_ULong* glyph_size )
@@ -550,6 +552,9 @@
FT_Int dy = point.y - last_y;
+ if ( i == 0 && have_overlap )
+ flag |= GLYF_OVERLAP_SIMPLE;
+
if ( dx == 0 )
flag |= GLYF_THIS_X_IS_SAME;
else if ( dx > -256 && dx < 256 )
@@ -834,15 +839,18 @@
FT_UInt num_substreams = 7;
+ FT_UShort option_flags;
FT_UShort num_glyphs;
FT_UShort index_format;
FT_ULong expected_loca_length;
FT_UInt offset;
FT_UInt i;
FT_ULong points_size;
- FT_ULong bitmap_length;
FT_ULong glyph_buf_size;
FT_ULong bbox_bitmap_offset;
+ FT_ULong bbox_bitmap_length;
+ FT_ULong overlap_bitmap_offset = 0;
+ FT_ULong overlap_bitmap_length = 0;
const FT_ULong glyf_start = *out_offset;
FT_ULong dest_offset = *out_offset;
@@ -858,15 +866,17 @@
if ( FT_NEW_ARRAY( substreams, num_substreams ) )
goto Fail;
- if ( FT_STREAM_SKIP( 4 ) )
+ if ( FT_STREAM_SKIP( 2 ) )
+ goto Fail;
+ if ( FT_READ_USHORT( option_flags ) )
goto Fail;
if ( FT_READ_USHORT( num_glyphs ) )
goto Fail;
if ( FT_READ_USHORT( index_format ) )
goto Fail;
- FT_TRACE4(( "num_glyphs = %u; index_format = %u\n",
- num_glyphs, index_format ));
+ FT_TRACE4(( "option_flags = %u; num_glyphs = %u; index_format = %u\n",
+ option_flags, num_glyphs, index_format ));
info->num_glyphs = num_glyphs;
@@ -879,7 +889,7 @@
if ( info->loca_table->dst_length != expected_loca_length )
goto Fail;
- offset = ( 2 + num_substreams ) * 4;
+ offset = 2 + 2 + 2 + 2 + ( num_substreams * 4 );
if ( offset > info->glyf_table->TransformLength )
goto Fail;
@@ -902,6 +912,20 @@
offset += substream_size;
}
+ if ( option_flags & HAVE_OVERLAP_SIMPLE_BITMAP )
+ {
+ /* Size of overlapBitmap = floor((numGlyphs + 7) / 8) */
+ overlap_bitmap_length = ( num_glyphs + 7U ) >> 3;
+ if ( overlap_bitmap_length > info->glyf_table->TransformLength - offset )
+ goto Fail;
+
+ overlap_bitmap_offset = pos + offset;
+
+ FT_TRACE5(( " Overlap bitmap: offset = %lu; size = %lu;\n",
+ overlap_bitmap_offset, overlap_bitmap_length ));
+ offset += overlap_bitmap_length;
+ }
+
if ( FT_NEW_ARRAY( loca_values, num_glyphs + 1 ) )
goto Fail;
@@ -909,8 +933,9 @@
bbox_bitmap_offset = substreams[BBOX_STREAM].offset;
/* Size of bboxBitmap = 4 * floor((numGlyphs + 31) / 32) */
- bitmap_length = ( ( num_glyphs + 31U ) >> 5 ) << 2;
- substreams[BBOX_STREAM].offset += bitmap_length;
+ bbox_bitmap_length = ( ( num_glyphs + 31U ) >> 5 ) << 2;
+ /* bboxStreamSize is the combined size of bboxBitmap and bboxStream. */
+ substreams[BBOX_STREAM].offset += bbox_bitmap_length;
glyph_buf_size = WOFF2_DEFAULT_GLYPH_BUF;
if ( FT_NEW_ARRAY( glyph_buf, glyph_buf_size ) )
@@ -948,7 +973,7 @@
/* composite glyph */
FT_Bool have_instructions = FALSE;
FT_UShort instruction_size = 0;
- FT_ULong composite_size;
+ FT_ULong composite_size = 0;
FT_ULong size_needed;
FT_Byte* pointer = NULL;
@@ -1026,8 +1051,11 @@
FT_ULong flag_size;
FT_ULong triplet_size;
FT_ULong triplet_bytes_used;
- FT_Byte* flags_buf = NULL;
- FT_Byte* triplet_buf = NULL;
+ FT_Bool have_overlap = FALSE;
+ FT_Byte overlap_bitmap;
+ FT_ULong overlap_offset;
+ FT_Byte* flags_buf = NULL;
+ FT_Byte* triplet_buf = NULL;
FT_UShort instruction_size;
FT_ULong size_needed;
FT_Int end_point;
@@ -1036,6 +1064,17 @@
FT_Byte* pointer = NULL;
+ /* Set `have_overlap`. */
+ if ( overlap_bitmap_offset )
+ {
+ overlap_offset = overlap_bitmap_offset + ( i >> 3 );
+ if ( FT_STREAM_SEEK( overlap_offset ) ||
+ FT_READ_BYTE( overlap_bitmap ) )
+ goto Fail;
+ if ( overlap_bitmap & ( 0x80 >> ( i & 7 ) ) )
+ have_overlap = TRUE;
+ }
+
if ( FT_NEW_ARRAY( n_points_arr, n_contours ) )
goto Fail;
@@ -1156,6 +1195,7 @@
points,
n_contours,
instruction_size,
+ have_overlap,
glyph_buf,
glyph_buf_size,
&glyph_size ) )
@@ -2064,7 +2104,7 @@
error = FT_THROW( Invalid_Table );
goto Exit;
}
- file_offset = ROUND4(woff2.metaOffset + woff2.metaLength);
+ file_offset = ROUND4( woff2.metaOffset + woff2.metaLength );
}
if ( woff2.privOffset )
@@ -2074,7 +2114,7 @@
error = FT_THROW( Invalid_Table );
goto Exit;
}
- file_offset = ROUND4(woff2.privOffset + woff2.privLength);
+ file_offset = ROUND4( woff2.privOffset + woff2.privLength );
}
if ( file_offset != ( ROUND4( woff2.length ) ) )
@@ -2086,7 +2126,7 @@
/* Validate requested face index. */
*num_faces = woff2.num_fonts;
/* value -(N+1) requests information on index N */
- if ( *face_instance_index < 0 )
+ if ( *face_instance_index < 0 && face_index > 0 )
face_index--;
if ( face_index >= woff2.num_fonts )