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* src/sfnt/sfwoff2.c: Improve trace comments. 

Adjust tracing levels for comments, and more formatting.
This commit is contained in:
Nikhil Ramakrishnan 2019-08-17 14:57:59 +05:30 committed by Werner Lemberg
parent 97616704aa
commit 1a10301532
2 changed files with 60 additions and 101 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2019-08-27 Nikhil Ramakrishnan <ramakrishnan.nikhil@gmail.com>
* src/sfnt/sfwoff2.c: Improve trace comments.
Adjust tracing levels for comments, and more formatting.
2019-08-27 Nikhil Ramakrishnan <ramakrishnan.nikhil@gmail.com>
[woff2] Support `hmtx' reconstruction when `glyf' is untransformed.

155
src/sfnt/sfwoff2.c
View File

@ -222,8 +222,7 @@
/* Reallocate `dst'. */
if ( ( *offset + size ) > *dst_size )
{
/* DEBUG - Remove later */
FT_TRACE2(( "Reallocating %lu to %lu.\n",
FT_TRACE6(( "Reallocating %lu to %lu.\n",
*dst_size, (*offset + size) ));
if ( FT_REALLOC( dst,
(FT_ULong)( *dst_size ),
@ -301,7 +300,7 @@
static FT_Error
woff2_uncompress( FT_Byte* dst,
woff2_decompress( FT_Byte* dst,
FT_ULong dst_size,
const FT_Byte* src,
FT_ULong src_size )
@ -317,15 +316,16 @@
if ( result != BROTLI_DECODER_RESULT_SUCCESS ||
uncompressed_size != dst_size )
{
FT_ERROR(( "woff2_uncompress: Stream length mismatch.\n" ));
FT_ERROR(( "woff2_decompress: Stream length mismatch.\n" ));
return FT_THROW( Invalid_Table );
}
FT_TRACE2(( "woff2_decompress: Brotli stream decompressed.\n" ));
return FT_Err_Ok;
#else /* !FT_CONFIG_OPTION_USE_BROTLI */
FT_ERROR(( "woff2_uncompress: Brotli support not available.\n" ));
FT_ERROR(( "woff2_decompress: Brotli support not available.\n" ));
return FT_THROW( Unimplemented_Feature );
#endif /* !FT_CONFIG_OPTION_USE_BROTLI */
@ -365,9 +365,6 @@
*num_hmetrics = num_metrics;
/* DEBUG - Remove later */
FT_TRACE2(( "num_hmetrics = %d\n", *num_hmetrics ));
return error;
}
@ -831,7 +828,7 @@
if ( FT_READ_USHORT( index_format ) )
goto Fail;
FT_TRACE2(( "Num_glyphs = %u; index_format = %u\n",
FT_TRACE4(( "num_glyphs = %u; index_format = %u\n",
num_glyphs, index_format ));
info->num_glyphs = num_glyphs;
@ -861,8 +858,7 @@
substreams[i].offset = pos + offset;
substreams[i].size = substream_size;
/* DEBUG - Remove later */
FT_TRACE2(( " Substream %d: offset = %lu; size = %lu;\n",
FT_TRACE5(( " Substream %d: offset = %lu; size = %lu;\n",
i, substreams[i].offset, substreams[i].size ));
offset += substream_size;
}
@ -1136,17 +1132,14 @@
loca_table->dst_length = dest_offset - loca_table->dst_offset;
FT_TRACE2(( " loca table info:\n" ));
FT_TRACE2(( " dst_offset = %lu\n", loca_table->dst_offset ));
FT_TRACE2(( " dst_length = %lu\n", loca_table->dst_length ));
FT_TRACE2(( " checksum = %08x\n", *loca_checksum ));
FT_TRACE4(( " loca table info:\n" ));
FT_TRACE4(( " dst_offset = %lu\n", loca_table->dst_offset ));
FT_TRACE4(( " dst_length = %lu\n", loca_table->dst_length ));
FT_TRACE4(( " checksum = %09x\n", *loca_checksum ));
/* Set pointer `sfnt_bytes' to its correct value. */
*sfnt_bytes = sfnt;
*out_offset = dest_offset;
/* DEBUG - Remove later */
if ( !error )
FT_TRACE2(( "reconstruct_glyf proceeding w/o errors.\n" ));
FT_FREE( substreams );
FT_FREE( loca_values );
@ -1205,8 +1198,6 @@
info->num_glyphs = num_glyphs;
FT_TRACE2(( "num_glyphs = %d", num_glyphs ));
/* Read `indexToLocFormat' from head table. */
if ( FT_STREAM_SEEK( head_table->src_offset ) && FT_STREAM_SKIP( 50 ) )
return error;
@ -1282,8 +1273,6 @@
FT_Byte* hmtx_table = NULL;
FT_Byte* dst = NULL;
FT_TRACE2(( "Reconstructing hmtx.\n" ));
if ( FT_READ_BYTE( hmtx_flags ) )
goto Fail;
@ -1360,20 +1349,20 @@
goto Fail;
dst = hmtx_table;
FT_TRACE2(( "hmtx values: \n" ));
FT_TRACE6(( "hmtx values: \n" ));
for ( i = 0; i < num_glyphs; i++ )
{
if ( i < num_hmetrics )
{
WRITE_SHORT( dst, advance_widths[i] );
FT_TRACE2(( "%d ", advance_widths[i] ));
FT_TRACE6(( "%d ", advance_widths[i] ));
}
WRITE_SHORT( dst, lsbs[i] );
FT_TRACE2(( "%d ", lsbs[i] ));
FT_TRACE6(( "%d ", lsbs[i] ));
}
FT_TRACE2(( "\n" ));
FT_TRACE6(( "\n" ));
*checksum = compute_ULong_sum( hmtx_table, hmtx_table_size );
/* Write hmtx table to sfnt buffer. */
if ( WRITE_SFNT_BUF( hmtx_table, hmtx_table_size ) )
@ -1466,10 +1455,9 @@
{
WOFF2_TableRec table = *( indices[nn] );
/* DEBUG - Remove later */
FT_TRACE2(( "Seeking to %d with table size %d.\n",
FT_TRACE3(( "Seeking to %d with table size %d.\n",
table.src_offset, table.src_length ));
FT_TRACE2(( "Table tag: %c%c%c%c.\n",
FT_TRACE3(( "Table tag: %c%c%c%c.\n",
(FT_Char)( table.Tag >> 24 ),
(FT_Char)( table.Tag >> 16 ),
(FT_Char)( table.Tag >> 8 ),
@ -1506,16 +1494,15 @@
table.dst_offset = dest_offset;
checksum = compute_ULong_sum( transformed_buf + table.src_offset,
table.src_length );
/* DEBUG - Remove later */
FT_TRACE2(( "Checksum = %08x\n", checksum ));
FT_TRACE4(( "Checksum = %09x.\n", checksum ));
if ( WRITE_SFNT_BUF( transformed_buf + table.src_offset,
table.src_length ) )
return FT_THROW( Invalid_Table );
}
else{
/* DEBUG - Remove later */
FT_TRACE2(( "This table has xform.\n" ));
FT_TRACE3(( "This table is transformed.\n" ));
if ( table.Tag == TTAG_glyf )
{
@ -1527,7 +1514,7 @@
&sfnt, sfnt_size, &dest_offset,
info, memory ) )
return FT_THROW( Invalid_Table );
FT_TRACE2(("glyf checksum is %08x\n", checksum));
FT_TRACE4(("Checksum = %09x.\n", checksum));
}
else if ( table.Tag == TTAG_loca )
{
@ -1591,7 +1578,7 @@
font_checksum = 0xB1B0AFBA - font_checksum;
WRITE_ULONG( buf_cursor, font_checksum );
FT_TRACE2(( "Final checksum = %u\n", font_checksum ));
FT_TRACE2(( "Final checksum = %09x.\n", font_checksum ));
woff2->actual_sfnt_size = dest_offset;
@ -1675,31 +1662,24 @@
FT_FRAME_END
};
/* DEBUG - Remove later */
FT_TRACE2(( "woff2_open_font: Received Data.\n" ));
FT_ASSERT( stream == face->root.stream );
FT_ASSERT( FT_STREAM_POS() == 0 );
face_index = FT_ABS( *face_instance_index ) & 0xFFFF;
/* DEBUG - Remove later. */
FT_TRACE2(( "Face index = %ld\n", face_index ));
/* Read WOFF2 Header. */
if ( FT_STREAM_READ_FIELDS( woff2_header_fields, &woff2 ) )
return error;
/* DEBUG - Remove later. */
FT_TRACE2(( "signature -> 0x%X\n", woff2.signature ));
FT_TRACE2(( "flavor -> 0x%X\n", woff2.flavor ));
FT_TRACE2(( "length -> %lu\n", woff2.length ));
FT_TRACE2(( "num_tables -> %hu\n", woff2.num_tables ));
FT_TRACE2(( "totalSfntSize -> %lu\n", woff2.totalSfntSize ));
FT_TRACE2(( "metaOffset -> %hu\n", woff2.metaOffset ));
FT_TRACE2(( "metaLength -> %hu\n", woff2.metaLength ));
FT_TRACE2(( "privOffset -> %hu\n", woff2.privOffset ));
FT_TRACE2(( "privLength -> %hu\n", woff2.privLength ));
FT_TRACE4(( "signature -> 0x%X\n", woff2.signature ));
FT_TRACE2(( "flavor -> 0x%08lx\n", woff2.flavor ));
FT_TRACE4(( "length -> %lu\n", woff2.length ));
FT_TRACE2(( "num_tables -> %hu\n", woff2.num_tables ));
FT_TRACE4(( "totalSfntSize -> %lu\n", woff2.totalSfntSize ));
FT_TRACE4(( "metaOffset -> %hu\n", woff2.metaOffset ));
FT_TRACE4(( "metaLength -> %hu\n", woff2.metaLength ));
FT_TRACE4(( "privOffset -> %hu\n", woff2.privOffset ));
FT_TRACE4(( "privLength -> %hu\n", woff2.privLength ));
/* Make sure we don't recurse back here. */
if ( woff2.flavor == TTAG_wOF2 )
@ -1718,13 +1698,11 @@
( woff2.privOffset >= woff2.length ) ||
( woff2.length - woff2.privOffset < woff2.privLength ) )
{
FT_ERROR(( "woff2_font_open: invalid WOFF2 header\n" ));
FT_ERROR(( "woff2_open_font: invalid WOFF2 header\n" ));
return FT_THROW( Invalid_Table );
}
/* DEBUG - Remove later. */
else{
FT_TRACE2(( "WOFF2 Header is valid.\n" ));
}
FT_TRACE2(( "woff2_open_font: WOFF2 Header is valid.\n" ));
/* Read table directory. */
if ( FT_NEW_ARRAY( tables, woff2.num_tables ) ||
@ -1817,10 +1795,7 @@
goto Exit;
}
/* DEBUG - Remove later. */
FT_TRACE2(( "Uncompressed size: %ld\n", woff2.uncompressed_size ));
FT_TRACE2(( "Table directory successfully parsed.\n" ));
FT_TRACE2(( "Table directory parsed.\n" ));
/* Check for and read collection directory. */
woff2.num_fonts = 1;
@ -1829,8 +1804,7 @@
FT_TRACE2(( "Font is a TTC, reading collection directory.\n" ));
if ( FT_READ_ULONG( woff2.header_version ) )
goto Exit;
/* DEBUG - Remove later */
FT_TRACE2(( "Header version: %lx\n", woff2.header_version ));
if ( woff2.header_version != 0x00010000 &&
woff2.header_version != 0x00020000 )
{
@ -1840,8 +1814,8 @@
if ( READ_255USHORT( woff2.num_fonts ) )
goto Exit;
/* DEBUG - Remove later */
FT_TRACE2(( "Number of fonts in TTC: %ld\n", woff2.num_fonts ));
FT_TRACE4(( "Number of fonts in TTC: %ld\n", woff2.num_fonts ));
if ( FT_NEW_ARRAY( woff2.ttc_fonts, woff2.num_fonts ) )
goto Exit;
@ -1857,11 +1831,11 @@
if ( FT_NEW_ARRAY( ttc_font->table_indices, ttc_font->num_tables ) )
goto Exit;
/* DEBUG - Change to TRACE4 */
FT_TRACE2(( "Number of tables in font %d: %ld\n",
FT_TRACE5(( "Number of tables in font %d: %ld\n",
nn, ttc_font->num_tables ));
/* DEBUG - Change to TRACE5 */
FT_TRACE2(( " Indices: " ));
FT_TRACE6(( " Indices: " ));
glyf_index = 0;
loca_index = 0;
@ -1873,8 +1847,8 @@
if ( READ_255USHORT( table_index ) )
goto Exit;
/* DEBUG - Change to TRACE5 */
FT_TRACE2(("%hu ", table_index));
FT_TRACE6(("%hu ", table_index));
ttc_font->table_indices[j] = table_index;
table = indices[table_index];
@ -1883,8 +1857,8 @@
if ( table->Tag == TTAG_glyf )
glyf_index = table_index;
}
/* DEBUG - Change to TRACE5 */
FT_TRACE2(( "\n" ));
FT_TRACE6(( "\n" ));
/* glyf and loca must be consecutive */
if ( glyf_index > 0 || loca_index > 0 )
@ -1965,8 +1939,7 @@
ttc_font->num_tables ) )
goto Exit;
/* DEBUG - Remove later */
FT_TRACE2(( "Storing tables for TTC face index %d.\n", face_index ));
FT_TRACE4(( "Storing tables for TTC face index %d.\n", face_index ));
for ( nn = 0; nn < ttc_font->num_tables; nn++ )
temp_indices[nn] = indices[ttc_font->table_indices[nn]];
@ -2001,8 +1974,6 @@
{
FT_UInt searchRange, entrySelector, rangeShift, x;
/* DEBUG - Remove later */
FT_TRACE2(( "Writing SFNT offset table.\n" ));
x = woff2.num_tables;
entrySelector = 0;
@ -2031,20 +2002,6 @@
sizeof ( WOFF2_Table ),
compare_tags );
/* DEBUG - Remove later */
FT_TRACE2(( "Sorted table indices: \n" ));
for ( nn = 0; nn < woff2.num_tables; ++nn )
{
WOFF2_Table table = indices[nn];
/* DEBUG - Remove later */
FT_TRACE2(( " Index %d", nn ));
FT_TRACE2(( " %c%c%c%c\n",
(FT_Char)( table->Tag >> 24 ),
(FT_Char)( table->Tag >> 16 ),
(FT_Char)( table->Tag >> 8 ),
(FT_Char)( table->Tag )));
}
if ( woff2.uncompressed_size < 1 )
{
error = FT_THROW( Invalid_Table );
@ -2057,7 +2014,7 @@
goto Exit;
/* Uncompress the stream. */
error = woff2_uncompress( uncompressed_buf, woff2.uncompressed_size,
error = woff2_decompress( uncompressed_buf, woff2.uncompressed_size,
stream->cursor, woff2.totalCompressedSize );
if ( error )
goto Exit;
@ -2073,8 +2030,7 @@
/* Resize `sfnt' to actual size of sfnt stream. */
if ( woff2.actual_sfnt_size < sfnt_size )
{
/* DEBUG - Remove later */
FT_TRACE2(( "Trimming sfnt stream from %lu to %lu.\n",
FT_TRACE5(( "Trimming sfnt stream from %lu to %lu.\n",
sfnt_size, woff2.actual_sfnt_size ));
if ( FT_REALLOC( sfnt,
(FT_ULong)( sfnt_size ),
@ -2096,16 +2052,13 @@
face->root.face_flags &= ~FT_FACE_FLAG_EXTERNAL_STREAM;
/* Set face_index. */
if ( *face_instance_index < 0 )
*face_instance_index = -1;
else
/* Set face_index to 0 or -1. */
if ( *face_instance_index >= 0 )
*face_instance_index = 0;
else
*face_instance_index = -1;
/* error = FT_THROW( Unimplemented_Feature ); */
/* DEBUG - Remove later */
FT_TRACE2(( "Reached end without errors.\n" ));
goto Exit;
FT_TRACE2(( "woff2_open_font: SFNT synthesized.\n" ));
Exit:
FT_FREE( tables );