forked from minhngoc25a/freetype2
- don't load metrics table in memory, reduces heap usage
- forgot to commit the changes in cffload.c that are already documented
This commit is contained in:
David Turner
parent
9d7d50f789
commit
91a3402d78
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@ -1,5 +1,11 @@
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2007-01-04 David Turner <david@freetype.org>
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* src/sfnt/ttmtx.c: don't extract the metrics table from the
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SFNT font file. Instead, reparse it on each glyph load,
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since the runtime difference will not be noticeable, and
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it can save a lot of heap memory when memory-mapped files
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are not used.
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* src/sfnt/ttcmap.c: slight optimization in the CMAP 4 validator
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* src/cff/cffload.c, src/cff/cffload.h, src/cff/cffgload.c,
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@ -605,7 +605,7 @@ FT_BEGIN_HEADER
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* is recommended to disable the macro since it reduces the library's code
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* size and activates a few memory-saving optimizations as well.
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*/
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#define FT_CONFIG_OPTION_OLD_INTERNALS
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/* #define FT_CONFIG_OPTION_OLD_INTERNALS */
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/*
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@ -1424,6 +1424,10 @@ FT_BEGIN_HEADER
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TT_BDFRec bdf;
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#endif /* TT_CONFIG_OPTION_BDF */
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/* since 2.2.2 */
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FT_ULong horz_metrics_offset;
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FT_ULong vert_metrics_offset;
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} TT_FaceRec;
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@ -746,7 +746,8 @@
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for ( i = 0; i < num_glyphs; i++ )
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charset->cids[charset->sids[i]] = (FT_UShort)i;
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charset->max_cid = max_cid;
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charset->max_cid = max_cid;
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charset->num_glyphs = num_glyphs;
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Exit:
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return error;
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@ -1194,7 +1195,7 @@
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if ( sid )
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gid = charset->cids[sid];
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gid = cff_charset_cid_to_gindex( charset, sid );
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if ( gid != 0 )
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{
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@ -68,34 +68,29 @@
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FT_Bool vertical )
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{
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FT_Error error;
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FT_ULong table_size;
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FT_Byte** ptable;
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FT_ULong tag, table_size;
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FT_ULong* ptable_offset;
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FT_ULong* ptable_size;
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if ( vertical )
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{
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error = face->goto_table( face, TTAG_vmtx, stream, &table_size );
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if ( error )
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goto Fail;
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ptable = &face->vert_metrics;
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ptable_size = &face->vert_metrics_size;
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tag = TTAG_vmtx;
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ptable_offset = &face->vert_metrics_offset;
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ptable_size = &face->vert_metrics_size;
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}
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else
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{
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error = face->goto_table( face, TTAG_hmtx, stream, &table_size );
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if ( error )
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goto Fail;
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ptable = &face->horz_metrics;
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ptable_size = &face->horz_metrics_size;
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tag = TTAG_hmtx;
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ptable_offset = &face->horz_metrics_offset;
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ptable_size = &face->horz_metrics_size;
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}
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if ( FT_FRAME_EXTRACT( table_size, *ptable ) )
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error = face->goto_table( face, tag, stream, &table_size );
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if (error)
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goto Fail;
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*ptable_size = table_size;
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*ptable_size = table_size;
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*ptable_offset = FT_STREAM_POS();
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Fail:
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return error;
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@ -343,50 +338,61 @@
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FT_Short *abearing,
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FT_UShort *aadvance )
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{
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FT_Error error;
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FT_Stream stream = face->root.stream;
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TT_HoriHeader* header;
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FT_Byte* p;
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FT_Byte* limit;
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FT_ULong table_pos, table_size, table_end;
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FT_UShort k;
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if ( vertical )
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{
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header = (TT_HoriHeader*)&face->vertical;
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p = face->vert_metrics;
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limit = p + face->vert_metrics_size;
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header = (TT_HoriHeader*)&face->vertical;
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table_pos = face->vert_metrics_offset;
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table_size = face->vert_metrics_size;
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}
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else
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{
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header = &face->horizontal;
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p = face->horz_metrics;
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limit = p + face->horz_metrics_size;
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header = &face->horizontal;
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table_pos = face->horz_metrics_offset;
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table_size = face->horz_metrics_size;
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}
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table_end = table_pos + table_end;
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k = header->number_Of_HMetrics;
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if ( k > 0 )
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{
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if ( gindex < (FT_UInt)k )
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{
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p += 4 * gindex;
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if ( p + 4 > limit )
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table_pos += 4*gindex;
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if ( table_pos+6 > table_end )
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goto NoData;
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*aadvance = FT_NEXT_USHORT( p );
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*abearing = FT_NEXT_SHORT( p );
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if ( FT_STREAM_SEEK( table_pos ) ||
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FT_READ_USHORT( *aadvance) ||
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FT_READ_SHORT( *abearing ) )
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goto NoData;
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}
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else
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{
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p += 4 * ( k - 1 );
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if ( p + 4 > limit )
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table_pos += 4*(k-1);
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if ( table_pos+4 > table_end )
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goto NoData;
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*aadvance = FT_NEXT_USHORT( p );
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p += 2 + 2 * ( gindex - k );
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if ( p + 2 > limit )
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if ( FT_STREAM_SEEK( table_pos ) ||
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FT_READ_USHORT( *aadvance ) )
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goto NoData;
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table_pos += 4 + 2*(gindex - k);
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if ( table_pos+2 > table_end )
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*abearing = 0;
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else
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*abearing = FT_PEEK_SHORT( p );
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{
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if ( !FT_STREAM_SEEK( table_pos ) )
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(void)FT_READ_SHORT( *abearing );
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}
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}
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}
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else
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@ -399,7 +405,7 @@
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return SFNT_Err_Ok;
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}
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#else /* !OPTIMIZE_MEMORY || OLD_INTERNALS */
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#else /* OLD_INTERNALS */
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FT_LOCAL_DEF( FT_Error )
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tt_face_get_metrics( TT_Face face,
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