--- /dev/null
+/***************************************************************************/
+/* */
+/* ttload.c */
+/* */
+/* Load the basic TrueType tables, i.e., tables that can be either in */
+/* TTF or OTF fonts (body). */
+/* */
+/* Copyright 1996-2001, 2002 by */
+/* David Turner, Robert Wilhelm, and Werner Lemberg. */
+/* */
+/* This file is part of the FreeType project, and may only be used, */
+/* modified, and distributed under the terms of the FreeType project */
+/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
+/* this file you indicate that you have read the license and */
+/* understand and accept it fully. */
+/* */
+/***************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_STREAM_H
+#include FT_TRUETYPE_TAGS_H
+#include "ttload.h"
+#include "ttcmap.h"
+
+#include "sferrors.h"
+
+
+ /*************************************************************************/
+ /* */
+ /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
+ /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
+ /* messages during execution. */
+ /* */
+#undef FT_COMPONENT
+#define FT_COMPONENT trace_ttload
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_lookup_table */
+ /* */
+ /* <Description> */
+ /* Looks for a TrueType table by name. */
+ /* */
+ /* <Input> */
+ /* face :: A face object handle. */
+ /* */
+ /* tag :: The searched tag. */
+ /* */
+ /* <Return> */
+ /* A pointer to the table directory entry. 0 if not found. */
+ /* */
+ FT_LOCAL_DEF( TT_Table )
+ tt_face_lookup_table( TT_Face face,
+ FT_ULong tag )
+ {
+ TT_Table entry;
+ TT_Table limit;
+
+
+ FT_TRACE3(( "tt_face_lookup_table: %08p, `%c%c%c%c' -- ",
+ face,
+ (FT_Char)( tag >> 24 ),
+ (FT_Char)( tag >> 16 ),
+ (FT_Char)( tag >> 8 ),
+ (FT_Char)( tag ) ));
+
+ entry = face->dir_tables;
+ limit = entry + face->num_tables;
+
+ for ( ; entry < limit; entry++ )
+ {
+ /* For compatibility with Windows, we consider 0-length */
+ /* tables the same as missing tables. */
+ if ( entry->Tag == tag && entry->Length != 0 )
+ {
+ FT_TRACE3(( "found table.\n" ));
+ return entry;
+ }
+ }
+
+ FT_TRACE3(( "could not find table!\n" ));
+ return 0;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_goto_table */
+ /* */
+ /* <Description> */
+ /* Looks for a TrueType table by name, then seek a stream to it. */
+ /* */
+ /* <Input> */
+ /* face :: A face object handle. */
+ /* */
+ /* tag :: The searched tag. */
+ /* */
+ /* stream :: The stream to seek when the table is found. */
+ /* */
+ /* <Output> */
+ /* length :: The length of the table if found, undefined otherwise. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_goto_table( TT_Face face,
+ FT_ULong tag,
+ FT_Stream stream,
+ FT_ULong* length )
+ {
+ TT_Table table;
+ FT_Error error;
+
+
+ table = tt_face_lookup_table( face, tag );
+ if ( table )
+ {
+ if ( length )
+ *length = table->Length;
+
+ if ( FT_STREAM_SEEK( table->Offset ) )
+ goto Exit;
+ }
+ else
+ error = SFNT_Err_Table_Missing;
+
+ Exit:
+ return error;
+ }
+
+
+ /* In theory, we should check the values of `search_range', */
+ /* `entry_selector', and `range_shift' to detect non-SFNT based files */
+ /* whose header might also start with 0x100000L (yes, these exist). */
+ /* */
+ /* Very unfortunately, many TrueType fonts don't have these fields */
+ /* set correctly and we must ignore them to support them. An alternative */
+ /* way to check the font file is thus to: */
+ /* */
+ /* - check that `num_tables' is valid */
+ /* - look for a "head" table, check its size, and parse it to */
+ /* see if its "magic" field is correctly set */
+ /* */
+ /* When checking directory entries, ignore the tables `glyx' and `locx' */
+ /* which are hacked-out versions of `glyf' and `loca' in some PostScript */
+ /* Type 42 fonts, and will generally be invalid. */
+ /* */
+ static FT_Error
+ sfnt_dir_check( FT_Stream stream,
+ FT_ULong offset,
+ FT_UInt num_tables )
+ {
+ FT_Error error;
+ FT_UInt nn, has_head = 0;
+
+ const FT_ULong glyx_tag = FT_MAKE_TAG( 'g', 'l', 'y', 'x' );
+ const FT_ULong locx_tag = FT_MAKE_TAG( 'l', 'o', 'c', 'x' );
+
+ static const FT_Frame_Field sfnt_dir_entry_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_TableRec
+
+ FT_FRAME_START( 16 ),
+ FT_FRAME_ULONG( Tag ),
+ FT_FRAME_ULONG( CheckSum ),
+ FT_FRAME_ULONG( Offset ),
+ FT_FRAME_ULONG( Length ),
+ FT_FRAME_END
+ };
+
+
+ /* if 'num_tables' is 0, read the table count from the file */
+ if ( num_tables == 0 )
+ {
+ FT_ULong format_tag;
+
+
+ if ( FT_STREAM_SEEK( offset ) ||
+ FT_READ_ULONG ( format_tag ) ||
+ FT_READ_USHORT( num_tables ) ||
+ FT_STREAM_SKIP( 6 ) )
+ goto Bad_Format;
+
+ if ( offset + 12 + num_tables*16 > stream->size )
+ goto Bad_Format;
+ }
+ else if ( FT_STREAM_SEEK( offset + 12 ) )
+ goto Bad_Format;
+
+ for ( nn = 0; nn < num_tables; nn++ )
+ {
+ TT_TableRec table;
+
+
+ if ( FT_STREAM_READ_FIELDS( sfnt_dir_entry_fields, &table ) )
+ goto Bad_Format;
+
+ if ( table.Offset + table.Length > stream->size &&
+ table.Tag != glyx_tag && table.Tag != locx_tag )
+ goto Bad_Format;
+
+ if ( table.Tag == TTAG_head )
+ {
+ FT_UInt32 magic;
+
+
+ has_head = 1;
+
+ /* the table length should be 0x36, but certain font tools
+ * make it 0x38, so we will just check that it is greater.
+ *
+ * note that according to the specification,
+ * the table must be padded to 32-bit lengths, but this doesn't
+ * apply to the value of its "Length" field !!
+ */
+ if ( table.Length < 0x36 ||
+ FT_STREAM_SEEK( table.Offset + 12 ) ||
+ FT_READ_ULONG( magic ) ||
+ magic != 0x5F0F3CF5UL )
+ goto Bad_Format;
+
+ if ( FT_STREAM_SEEK( offset + 28 + 16*nn ) )
+ goto Bad_Format;
+ }
+ }
+
+ if ( has_head == 0 )
+ goto Bad_Format;
+
+ Exit:
+ return error;
+
+ Bad_Format:
+ error = FT_Err_Unknown_File_Format;
+ goto Exit;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_sfnt_header */
+ /* */
+ /* <Description> */
+ /* Loads the header of a SFNT font file. Supports collections. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: The input stream. */
+ /* */
+ /* face_index :: If the font is a collection, the number of the font */
+ /* in the collection, ignored otherwise. */
+ /* */
+ /* <Output> */
+ /* sfnt :: The SFNT header. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ /* <Note> */
+ /* The stream cursor must be at the font file's origin. */
+ /* */
+ /* This function recognizes fonts embedded in a `TrueType collection' */
+ /* */
+ /* The header will be checked whether it is valid by looking at the */
+ /* values of `search_range', `entry_selector', and `range_shift'. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_sfnt_header( TT_Face face,
+ FT_Stream stream,
+ FT_Long face_index,
+ SFNT_Header sfnt )
+ {
+ FT_Error error;
+ FT_ULong format_tag, offset;
+ FT_Memory memory = stream->memory;
+
+ static const FT_Frame_Field sfnt_header_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE SFNT_HeaderRec
+
+ FT_FRAME_START( 8 ),
+ FT_FRAME_USHORT( num_tables ),
+ FT_FRAME_USHORT( search_range ),
+ FT_FRAME_USHORT( entry_selector ),
+ FT_FRAME_USHORT( range_shift ),
+ FT_FRAME_END
+ };
+
+ static const FT_Frame_Field ttc_header_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TTC_HeaderRec
+
+ FT_FRAME_START( 8 ),
+ FT_FRAME_LONG( version ),
+ FT_FRAME_LONG( count ),
+ FT_FRAME_END
+ };
+
+
+ FT_TRACE2(( "tt_face_load_sfnt_header: %08p, %ld\n",
+ face, face_index ));
+
+ face->ttc_header.tag = 0;
+ face->ttc_header.version = 0;
+ face->ttc_header.count = 0;
+
+ face->num_tables = 0;
+
+ /* first of all, read the first 4 bytes. If it is `ttcf', then the */
+ /* file is a TrueType collection, otherwise it can be any other */
+ /* kind of font. */
+ /* */
+ offset = FT_STREAM_POS();
+
+ if ( FT_READ_ULONG( format_tag ) )
+ goto Exit;
+
+ if ( format_tag == TTAG_ttcf )
+ {
+ FT_Int n;
+
+
+ FT_TRACE3(( "tt_face_load_sfnt_header: file is a collection\n" ));
+
+ /* It is a TrueType collection, i.e. a file containing several */
+ /* font files. Read the font directory now */
+ if ( FT_STREAM_READ_FIELDS( ttc_header_fields, &face->ttc_header ) )
+ goto Exit;
+
+ /* now read the offsets of each font in the file */
+ if ( FT_NEW_ARRAY( face->ttc_header.offsets, face->ttc_header.count ) ||
+ FT_FRAME_ENTER( face->ttc_header.count * 4L ) )
+ goto Exit;
+
+ for ( n = 0; n < face->ttc_header.count; n++ )
+ face->ttc_header.offsets[n] = FT_GET_ULONG();
+
+ FT_FRAME_EXIT();
+
+ /* check face index */
+ if ( face_index >= face->ttc_header.count )
+ {
+ error = SFNT_Err_Bad_Argument;
+ goto Exit;
+ }
+
+ /* seek to the appropriate TrueType file, then read tag */
+ offset = face->ttc_header.offsets[face_index];
+
+ if ( FT_STREAM_SEEK( offset ) ||
+ FT_READ_LONG( format_tag ) )
+ goto Exit;
+ }
+
+ /* the format tag was read, now check the rest of the header */
+ sfnt->format_tag = format_tag;
+ sfnt->offset = offset;
+
+ if ( FT_STREAM_READ_FIELDS( sfnt_header_fields, sfnt ) )
+ goto Exit;
+
+ /* now check the sfnt directory */
+ error = sfnt_dir_check( stream, offset, sfnt->num_tables );
+ if ( error )
+ {
+ FT_TRACE2(( "tt_face_load_sfnt_header: file is not SFNT!\n" ));
+ error = SFNT_Err_Unknown_File_Format;
+ }
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_directory */
+ /* */
+ /* <Description> */
+ /* Loads the table directory into a face object. */
+ /* */
+ /* <InOut> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* <Input> */
+ /* stream :: The input stream. */
+ /* */
+ /* sfnt :: The SFNT directory header. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ /* <Note> */
+ /* The stream cursor must be at the font file's origin. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_directory( TT_Face face,
+ FT_Stream stream,
+ SFNT_Header sfnt )
+ {
+ FT_Error error;
+ FT_Memory memory = stream->memory;
+
+ TT_TableRec *entry, *limit;
+
+
+ FT_TRACE2(( "tt_face_load_directory: %08p\n", face ));
+
+ FT_TRACE2(( "-- Tables count: %12u\n", sfnt->num_tables ));
+ FT_TRACE2(( "-- Format version: %08lx\n", sfnt->format_tag ));
+
+ face->num_tables = sfnt->num_tables;
+
+ if ( FT_NEW_ARRAY( face->dir_tables, face->num_tables ) )
+ goto Exit;
+
+ if ( FT_STREAM_SEEK( sfnt->offset + 12 ) ||
+ FT_FRAME_ENTER( face->num_tables * 16L ) )
+ goto Exit;
+
+ entry = face->dir_tables;
+ limit = entry + face->num_tables;
+
+ for ( ; entry < limit; entry++ )
+ { /* loop through the tables and get all entries */
+ entry->Tag = FT_GET_TAG4();
+ entry->CheckSum = FT_GET_ULONG();
+ entry->Offset = FT_GET_LONG();
+ entry->Length = FT_GET_LONG();
+
+ FT_TRACE2(( " %c%c%c%c - %08lx - %08lx\n",
+ (FT_Char)( entry->Tag >> 24 ),
+ (FT_Char)( entry->Tag >> 16 ),
+ (FT_Char)( entry->Tag >> 8 ),
+ (FT_Char)( entry->Tag ),
+ entry->Offset,
+ entry->Length ));
+ }
+
+ FT_FRAME_EXIT();
+
+ FT_TRACE2(( "Directory loaded\n\n" ));
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_any */
+ /* */
+ /* <Description> */
+ /* Loads any font table into client memory. */
+ /* */
+ /* <Input> */
+ /* face :: The face object to look for. */
+ /* */
+ /* tag :: The tag of table to load. Use the value 0 if you want */
+ /* to access the whole font file, else set this parameter */
+ /* to a valid TrueType table tag that you can forge with */
+ /* the MAKE_TT_TAG macro. */
+ /* */
+ /* offset :: The starting offset in the table (or the file if */
+ /* tag == 0). */
+ /* */
+ /* length :: The address of the decision variable: */
+ /* */
+ /* If length == NULL: */
+ /* Loads the whole table. Returns an error if */
+ /* `offset' == 0! */
+ /* */
+ /* If *length == 0: */
+ /* Exits immediately; returning the length of the given */
+ /* table or of the font file, depending on the value of */
+ /* `tag'. */
+ /* */
+ /* If *length != 0: */
+ /* Loads the next `length' bytes of table or font, */
+ /* starting at offset `offset' (in table or font too). */
+ /* */
+ /* <Output> */
+ /* buffer :: The address of target buffer. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_any( TT_Face face,
+ FT_ULong tag,
+ FT_Long offset,
+ FT_Byte* buffer,
+ FT_ULong* length )
+ {
+ FT_Error error;
+ FT_Stream stream;
+ TT_Table table;
+ FT_ULong size;
+
+
+ if ( tag != 0 )
+ {
+ /* look for tag in font directory */
+ table = tt_face_lookup_table( face, tag );
+ if ( !table )
+ {
+ error = SFNT_Err_Table_Missing;
+ goto Exit;
+ }
+
+ offset += table->Offset;
+ size = table->Length;
+ }
+ else
+ /* tag == 0 -- the user wants to access the font file directly */
+ size = face->root.stream->size;
+
+ if ( length && *length == 0 )
+ {
+ *length = size;
+
+ return SFNT_Err_Ok;
+ }
+
+ if ( length )
+ size = *length;
+
+ stream = face->root.stream;
+ /* the `if' is syntactic sugar for picky compilers */
+ if ( FT_STREAM_READ_AT( offset, buffer, size ) )
+ goto Exit;
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_generic_header */
+ /* */
+ /* <Description> */
+ /* Loads the TrueType table `head' or `bhed'. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: The input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ static FT_Error
+ tt_face_load_generic_header( TT_Face face,
+ FT_Stream stream,
+ FT_ULong tag )
+ {
+ FT_Error error;
+ TT_Header* header;
+
+ static const FT_Frame_Field header_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_Header
+
+ FT_FRAME_START( 54 ),
+ FT_FRAME_ULONG ( Table_Version ),
+ FT_FRAME_ULONG ( Font_Revision ),
+ FT_FRAME_LONG ( CheckSum_Adjust ),
+ FT_FRAME_LONG ( Magic_Number ),
+ FT_FRAME_USHORT( Flags ),
+ FT_FRAME_USHORT( Units_Per_EM ),
+ FT_FRAME_LONG ( Created[0] ),
+ FT_FRAME_LONG ( Created[1] ),
+ FT_FRAME_LONG ( Modified[0] ),
+ FT_FRAME_LONG ( Modified[1] ),
+ FT_FRAME_SHORT ( xMin ),
+ FT_FRAME_SHORT ( yMin ),
+ FT_FRAME_SHORT ( xMax ),
+ FT_FRAME_SHORT ( yMax ),
+ FT_FRAME_USHORT( Mac_Style ),
+ FT_FRAME_USHORT( Lowest_Rec_PPEM ),
+ FT_FRAME_SHORT ( Font_Direction ),
+ FT_FRAME_SHORT ( Index_To_Loc_Format ),
+ FT_FRAME_SHORT ( Glyph_Data_Format ),
+ FT_FRAME_END
+ };
+
+
+ FT_TRACE2(( "tt_face_load_generic_header: "
+ "%08p, looking up font table `%c%c%c%c'.\n",
+ face,
+ (FT_Char)( tag >> 24 ),
+ (FT_Char)( tag >> 16 ),
+ (FT_Char)( tag >> 8 ),
+ (FT_Char)( tag ) ));
+
+ error = face->goto_table( face, tag, stream, 0 );
+ if ( error )
+ {
+ FT_TRACE2(( "tt_face_load_generic_header: Font table is missing!\n" ));
+ goto Exit;
+ }
+
+ header = &face->header;
+
+ if ( FT_STREAM_READ_FIELDS( header_fields, header ) )
+ goto Exit;
+
+ FT_TRACE2(( " Units per EM: %8u\n", header->Units_Per_EM ));
+ FT_TRACE2(( " IndexToLoc: %8d\n", header->Index_To_Loc_Format ));
+ FT_TRACE2(( "tt_face_load_generic_header: Font table loaded.\n" ));
+
+ Exit:
+ return error;
+ }
+
+
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_header( TT_Face face,
+ FT_Stream stream )
+ {
+ return tt_face_load_generic_header( face, stream, TTAG_head );
+ }
+
+
+#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
+
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_bitmap_header( TT_Face face,
+ FT_Stream stream )
+ {
+ return tt_face_load_generic_header( face, stream, TTAG_bhed );
+ }
+
+#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_max_profile */
+ /* */
+ /* <Description> */
+ /* Loads the maximum profile into a face object. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: The input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_max_profile( TT_Face face,
+ FT_Stream stream )
+ {
+ FT_Error error;
+ TT_MaxProfile* maxProfile = &face->max_profile;
+
+ const FT_Frame_Field maxp_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_MaxProfile
+
+ FT_FRAME_START( 6 ),
+ FT_FRAME_LONG ( version ),
+ FT_FRAME_USHORT( numGlyphs ),
+ FT_FRAME_END
+ };
+
+ const FT_Frame_Field maxp_fields_extra[] =
+ {
+ FT_FRAME_START( 26 ),
+ FT_FRAME_USHORT( maxPoints ),
+ FT_FRAME_USHORT( maxContours ),
+ FT_FRAME_USHORT( maxCompositePoints ),
+ FT_FRAME_USHORT( maxCompositeContours ),
+ FT_FRAME_USHORT( maxZones ),
+ FT_FRAME_USHORT( maxTwilightPoints ),
+ FT_FRAME_USHORT( maxStorage ),
+ FT_FRAME_USHORT( maxFunctionDefs ),
+ FT_FRAME_USHORT( maxInstructionDefs ),
+ FT_FRAME_USHORT( maxStackElements ),
+ FT_FRAME_USHORT( maxSizeOfInstructions ),
+ FT_FRAME_USHORT( maxComponentElements ),
+ FT_FRAME_USHORT( maxComponentDepth ),
+ FT_FRAME_END
+ };
+
+
+ FT_TRACE2(( "Load_TT_MaxProfile: %08p\n", face ));
+
+ error = face->goto_table( face, TTAG_maxp, stream, 0 );
+ if ( error )
+ goto Exit;
+
+ if ( FT_STREAM_READ_FIELDS( maxp_fields, maxProfile ) )
+ goto Exit;
+
+ maxProfile->maxPoints = 0;
+ maxProfile->maxContours = 0;
+ maxProfile->maxCompositePoints = 0;
+ maxProfile->maxCompositeContours = 0;
+ maxProfile->maxZones = 0;
+ maxProfile->maxTwilightPoints = 0;
+ maxProfile->maxStorage = 0;
+ maxProfile->maxFunctionDefs = 0;
+ maxProfile->maxInstructionDefs = 0;
+ maxProfile->maxStackElements = 0;
+ maxProfile->maxSizeOfInstructions = 0;
+ maxProfile->maxComponentElements = 0;
+ maxProfile->maxComponentDepth = 0;
+
+ if ( maxProfile->version >= 0x10000L )
+ {
+ if ( FT_STREAM_READ_FIELDS( maxp_fields_extra, maxProfile ) )
+ goto Exit;
+
+ /* XXX: an adjustment that is necessary to load certain */
+ /* broken fonts like `Keystrokes MT' :-( */
+ /* */
+ /* We allocate 64 function entries by default when */
+ /* the maxFunctionDefs field is null. */
+
+ if ( maxProfile->maxFunctionDefs == 0 )
+ maxProfile->maxFunctionDefs = 64;
+
+ face->root.num_glyphs = maxProfile->numGlyphs;
+
+ face->root.internal->max_points =
+ (FT_UShort)MAX( maxProfile->maxCompositePoints,
+ maxProfile->maxPoints );
+
+ face->root.internal->max_contours =
+ (FT_Short)MAX( maxProfile->maxCompositeContours,
+ maxProfile->maxContours );
+
+ face->max_components = (FT_ULong)maxProfile->maxComponentElements +
+ maxProfile->maxComponentDepth;
+
+ /* XXX: some fonts have maxComponents set to 0; we will */
+ /* then use 16 of them by default. */
+ if ( face->max_components == 0 )
+ face->max_components = 16;
+
+ /* We also increase maxPoints and maxContours in order to support */
+ /* some broken fonts. */
+ face->root.internal->max_points += (FT_UShort)8;
+ face->root.internal->max_contours += (FT_Short) 4;
+ }
+
+ FT_TRACE2(( "MAXP loaded.\n" ));
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_metrics */
+ /* */
+ /* <Description> */
+ /* Loads the horizontal or vertical metrics table into a face object. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: The input stream. */
+ /* */
+ /* vertical :: A boolean flag. If set, load vertical metrics. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ static FT_Error
+ tt_face_load_metrics( TT_Face face,
+ FT_Stream stream,
+ FT_Bool vertical )
+ {
+ FT_Error error;
+ FT_Memory memory = stream->memory;
+
+ FT_ULong table_len;
+ FT_Long num_shorts, num_longs, num_shorts_checked;
+
+ TT_LongMetrics * longs;
+ TT_ShortMetrics** shorts;
+
+
+ FT_TRACE2(( "TT_Load_%s_Metrics: %08p\n", vertical ? "Vertical"
+ : "Horizontal",
+ face ));
+
+ if ( vertical )
+ {
+ /* The table is optional, quit silently if it wasn't found */
+ /* */
+ /* XXX: Some fonts have a valid vertical header with a non-null */
+ /* `number_of_VMetrics' fields, but no corresponding `vmtx' */
+ /* table to get the metrics from (e.g. mingliu). */
+ /* */
+ /* For safety, we set the field to 0! */
+ /* */
+ error = face->goto_table( face, TTAG_vmtx, stream, &table_len );
+ if ( error )
+ {
+ /* Set number_Of_VMetrics to 0! */
+ FT_TRACE2(( " no vertical header in file.\n" ));
+ face->vertical.number_Of_VMetrics = 0;
+ error = SFNT_Err_Ok;
+ goto Exit;
+ }
+
+ num_longs = face->vertical.number_Of_VMetrics;
+ longs = (TT_LongMetrics *)&face->vertical.long_metrics;
+ shorts = (TT_ShortMetrics**)&face->vertical.short_metrics;
+ }
+ else
+ {
+ error = face->goto_table( face, TTAG_hmtx, stream, &table_len );
+ if ( error )
+ {
+
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+ /* If this is an incrementally loaded font and there are */
+ /* overriding metrics tolerate a missing 'hmtx' table. */
+ if ( face->root.internal->incremental_interface &&
+ face->root.internal->incremental_interface->funcs->
+ get_glyph_metrics )
+ {
+ face->horizontal.number_Of_HMetrics = 0;
+ error = SFNT_Err_Ok;
+ goto Exit;
+ }
+#endif
+
+ FT_ERROR(( " no horizontal metrics in file!\n" ));
+ error = SFNT_Err_Hmtx_Table_Missing;
+ goto Exit;
+ }
+
+ num_longs = face->horizontal.number_Of_HMetrics;
+ longs = (TT_LongMetrics *)&face->horizontal.long_metrics;
+ shorts = (TT_ShortMetrics**)&face->horizontal.short_metrics;
+ }
+
+ /* never trust derived values */
+
+ num_shorts = face->max_profile.numGlyphs - num_longs;
+ num_shorts_checked = ( table_len - num_longs * 4L ) / 2;
+
+ if ( num_shorts < 0 )
+ {
+ FT_ERROR(( "TT_Load_%s_Metrics: more metrics than glyphs!\n",
+ vertical ? "Vertical"
+ : "Horizontal" ));
+
+ error = vertical ? SFNT_Err_Invalid_Vert_Metrics
+ : SFNT_Err_Invalid_Horiz_Metrics;
+ goto Exit;
+ }
+
+ if ( FT_NEW_ARRAY( *longs, num_longs ) ||
+ FT_NEW_ARRAY( *shorts, num_shorts ) )
+ goto Exit;
+
+ if ( FT_FRAME_ENTER( table_len ) )
+ goto Exit;
+
+ {
+ TT_LongMetrics cur = *longs;
+ TT_LongMetrics limit = cur + num_longs;
+
+
+ for ( ; cur < limit; cur++ )
+ {
+ cur->advance = FT_GET_USHORT();
+ cur->bearing = FT_GET_SHORT();
+ }
+ }
+
+ /* do we have an inconsistent number of metric values? */
+ {
+ TT_ShortMetrics* cur = *shorts;
+ TT_ShortMetrics* limit = cur + MIN( num_shorts, num_shorts_checked );
+
+
+ for ( ; cur < limit; cur++ )
+ *cur = FT_GET_SHORT();
+
+ /* we fill up the missing left side bearings with the */
+ /* last valid value. Since this will occur for buggy CJK */
+ /* fonts usually only, nothing serious will happen */
+ if ( num_shorts > num_shorts_checked && num_shorts_checked > 0 )
+ {
+ FT_Short val = (*shorts)[num_shorts_checked - 1];
+
+
+ limit = *shorts + num_shorts;
+ for ( ; cur < limit; cur++ )
+ *cur = val;
+ }
+ }
+
+ FT_FRAME_EXIT();
+
+ FT_TRACE2(( "loaded\n" ));
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_metrics_header */
+ /* */
+ /* <Description> */
+ /* Loads the horizontal or vertical header in a face object. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: The input stream. */
+ /* */
+ /* vertical :: A boolean flag. If set, load vertical metrics. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_metrics_header( TT_Face face,
+ FT_Stream stream,
+ FT_Bool vertical )
+ {
+ FT_Error error;
+ TT_HoriHeader* header;
+
+ const FT_Frame_Field metrics_header_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_HoriHeader
+
+ FT_FRAME_START( 36 ),
+ FT_FRAME_ULONG ( Version ),
+ FT_FRAME_SHORT ( Ascender ),
+ FT_FRAME_SHORT ( Descender ),
+ FT_FRAME_SHORT ( Line_Gap ),
+ FT_FRAME_USHORT( advance_Width_Max ),
+ FT_FRAME_SHORT ( min_Left_Side_Bearing ),
+ FT_FRAME_SHORT ( min_Right_Side_Bearing ),
+ FT_FRAME_SHORT ( xMax_Extent ),
+ FT_FRAME_SHORT ( caret_Slope_Rise ),
+ FT_FRAME_SHORT ( caret_Slope_Run ),
+ FT_FRAME_SHORT ( caret_Offset ),
+ FT_FRAME_SHORT ( Reserved[0] ),
+ FT_FRAME_SHORT ( Reserved[1] ),
+ FT_FRAME_SHORT ( Reserved[2] ),
+ FT_FRAME_SHORT ( Reserved[3] ),
+ FT_FRAME_SHORT ( metric_Data_Format ),
+ FT_FRAME_USHORT( number_Of_HMetrics ),
+ FT_FRAME_END
+ };
+
+
+ FT_TRACE2(( vertical ? "Vertical header " : "Horizontal header " ));
+
+ if ( vertical )
+ {
+ face->vertical_info = 0;
+
+ /* The vertical header table is optional, so return quietly if */
+ /* we don't find it. */
+ error = face->goto_table( face, TTAG_vhea, stream, 0 );
+ if ( error )
+ {
+ error = SFNT_Err_Ok;
+ goto Exit;
+ }
+
+ face->vertical_info = 1;
+ header = (TT_HoriHeader*)&face->vertical;
+ }
+ else
+ {
+ /* The horizontal header is mandatory; return an error if we */
+ /* don't find it. */
+ error = face->goto_table( face, TTAG_hhea, stream, 0 );
+ if ( error )
+ {
+ error = SFNT_Err_Horiz_Header_Missing;
+ goto Exit;
+ }
+
+ header = &face->horizontal;
+ }
+
+ if ( FT_STREAM_READ_FIELDS( metrics_header_fields, header ) )
+ goto Exit;
+
+ header->long_metrics = NULL;
+ header->short_metrics = NULL;
+
+ FT_TRACE2(( "loaded\n" ));
+
+ /* Now try to load the corresponding metrics */
+
+ error = tt_face_load_metrics( face, stream, vertical );
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_names */
+ /* */
+ /* <Description> */
+ /* Loads the name records. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: The input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_names( TT_Face face,
+ FT_Stream stream )
+ {
+ FT_Error error;
+ FT_Memory memory = stream->memory;
+ FT_ULong table_pos, table_len;
+ FT_ULong storage_start, storage_limit;
+ FT_UInt count;
+ TT_NameTable table;
+
+ static const FT_Frame_Field name_table_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_NameTableRec
+
+ FT_FRAME_START( 6 ),
+ FT_FRAME_USHORT( format ),
+ FT_FRAME_USHORT( numNameRecords ),
+ FT_FRAME_USHORT( storageOffset ),
+ FT_FRAME_END
+ };
+
+ static const FT_Frame_Field name_record_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_NameEntryRec
+
+ /* no FT_FRAME_START */
+ FT_FRAME_USHORT( platformID ),
+ FT_FRAME_USHORT( encodingID ),
+ FT_FRAME_USHORT( languageID ),
+ FT_FRAME_USHORT( nameID ),
+ FT_FRAME_USHORT( stringLength ),
+ FT_FRAME_USHORT( stringOffset ),
+ FT_FRAME_END
+ };
+
+
+ table = &face->name_table;
+ table->stream = stream;
+
+ FT_TRACE2(( "Names " ));
+
+ error = face->goto_table( face, TTAG_name, stream, &table_len );
+ if ( error )
+ {
+ /* The name table is required so indicate failure. */
+ FT_TRACE2(( "is missing!\n" ));
+ error = SFNT_Err_Name_Table_Missing;
+ goto Exit;
+ }
+
+ table_pos = FT_STREAM_POS();
+
+
+ if ( FT_STREAM_READ_FIELDS( name_table_fields, table ) )
+ goto Exit;
+
+ /* Some popular Asian fonts have an invalid `storageOffset' value */
+ /* (it should be at least "6 + 12*num_names"). However, the string */
+ /* offsets, computed as "storageOffset + entry->stringOffset", are */
+ /* valid pointers within the name table... */
+ /* */
+ /* We thus can't check `storageOffset' right now. */
+ /* */
+ storage_start = table_pos + 6 + 12*table->numNameRecords;
+ storage_limit = table_pos + table_len;
+
+ if ( storage_start > storage_limit )
+ {
+ FT_ERROR(( "tt_face_load_names: invalid `name' table\n" ));
+ error = SFNT_Err_Name_Table_Missing;
+ goto Exit;
+ }
+
+ /* Allocate the array of name records. */
+ count = table->numNameRecords;
+ table->numNameRecords = 0;
+
+ if ( FT_NEW_ARRAY( table->names, count ) ||
+ FT_FRAME_ENTER( count * 12 ) )
+ goto Exit;
+
+ /* Load the name records and determine how much storage is needed */
+ /* to hold the strings themselves. */
+ {
+ TT_NameEntryRec* entry = table->names;
+
+
+ for ( ; count > 0; count-- )
+ {
+ if ( FT_STREAM_READ_FIELDS( name_record_fields, entry ) )
+ continue;
+
+ /* check that the name is not empty */
+ if ( entry->stringLength == 0 )
+ continue;
+
+ /* check that the name string is within the table */
+ entry->stringOffset += table_pos + table->storageOffset;
+ if ( entry->stringOffset < storage_start ||
+ entry->stringOffset + entry->stringLength > storage_limit )
+ {
+ /* invalid entry - ignore it */
+ entry->stringOffset = 0;
+ entry->stringLength = 0;
+ continue;
+ }
+
+ entry++;
+ }
+
+ table->numNameRecords = (FT_UInt)( entry - table->names );
+ }
+
+ FT_FRAME_EXIT();
+
+ FT_TRACE2(( "loaded\n" ));
+
+ /* everything went well, update face->num_names */
+ face->num_names = (FT_UShort) table->numNameRecords;
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_free_names */
+ /* */
+ /* <Description> */
+ /* Frees the name records. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ FT_LOCAL_DEF( void )
+ tt_face_free_names( TT_Face face )
+ {
+ FT_Memory memory = face->root.driver->root.memory;
+ TT_NameTable table = &face->name_table;
+ TT_NameEntry entry = table->names;
+ FT_UInt count = table->numNameRecords;
+
+
+ for ( ; count > 0; count--, entry++ )
+ {
+ FT_FREE( entry->string );
+ entry->stringLength = 0;
+ }
+
+ /* free strings table */
+ FT_FREE( table->names );
+
+ table->numNameRecords = 0;
+ table->format = 0;
+ table->storageOffset = 0;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_cmap */
+ /* */
+ /* <Description> */
+ /* Loads the cmap directory in a face object. The cmaps itselves are */
+ /* loaded on demand in the `ttcmap.c' module. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: A handle to the input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_cmap( TT_Face face,
+ FT_Stream stream )
+ {
+ FT_Error error;
+
+
+ error = face->goto_table( face, TTAG_cmap, stream, &face->cmap_size );
+ if ( error )
+ {
+ FT_TRACE2(( "No `cmap' table in font !\n" ));
+ error = SFNT_Err_CMap_Table_Missing;
+ goto Exit;
+ }
+
+ if ( !FT_FRAME_EXTRACT( face->cmap_size, face->cmap_table ) )
+ FT_TRACE2(( "`cmap' table loaded\n" ));
+ else
+ {
+ FT_ERROR(( "`cmap' table is too short!\n" ));
+ face->cmap_size = 0;
+ }
+
+ Exit:
+ return error;
+ }
+
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_os2 */
+ /* */
+ /* <Description> */
+ /* Loads the OS2 table. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: A handle to the input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_os2( TT_Face face,
+ FT_Stream stream )
+ {
+ FT_Error error;
+ TT_OS2* os2;
+
+ const FT_Frame_Field os2_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_OS2
+
+ FT_FRAME_START( 78 ),
+ FT_FRAME_USHORT( version ),
+ FT_FRAME_SHORT ( xAvgCharWidth ),
+ FT_FRAME_USHORT( usWeightClass ),
+ FT_FRAME_USHORT( usWidthClass ),
+ FT_FRAME_SHORT ( fsType ),
+ FT_FRAME_SHORT ( ySubscriptXSize ),
+ FT_FRAME_SHORT ( ySubscriptYSize ),
+ FT_FRAME_SHORT ( ySubscriptXOffset ),
+ FT_FRAME_SHORT ( ySubscriptYOffset ),
+ FT_FRAME_SHORT ( ySuperscriptXSize ),
+ FT_FRAME_SHORT ( ySuperscriptYSize ),
+ FT_FRAME_SHORT ( ySuperscriptXOffset ),
+ FT_FRAME_SHORT ( ySuperscriptYOffset ),
+ FT_FRAME_SHORT ( yStrikeoutSize ),
+ FT_FRAME_SHORT ( yStrikeoutPosition ),
+ FT_FRAME_SHORT ( sFamilyClass ),
+ FT_FRAME_BYTE ( panose[0] ),
+ FT_FRAME_BYTE ( panose[1] ),
+ FT_FRAME_BYTE ( panose[2] ),
+ FT_FRAME_BYTE ( panose[3] ),
+ FT_FRAME_BYTE ( panose[4] ),
+ FT_FRAME_BYTE ( panose[5] ),
+ FT_FRAME_BYTE ( panose[6] ),
+ FT_FRAME_BYTE ( panose[7] ),
+ FT_FRAME_BYTE ( panose[8] ),
+ FT_FRAME_BYTE ( panose[9] ),
+ FT_FRAME_ULONG ( ulUnicodeRange1 ),
+ FT_FRAME_ULONG ( ulUnicodeRange2 ),
+ FT_FRAME_ULONG ( ulUnicodeRange3 ),
+ FT_FRAME_ULONG ( ulUnicodeRange4 ),
+ FT_FRAME_BYTE ( achVendID[0] ),
+ FT_FRAME_BYTE ( achVendID[1] ),
+ FT_FRAME_BYTE ( achVendID[2] ),
+ FT_FRAME_BYTE ( achVendID[3] ),
+
+ FT_FRAME_USHORT( fsSelection ),
+ FT_FRAME_USHORT( usFirstCharIndex ),
+ FT_FRAME_USHORT( usLastCharIndex ),
+ FT_FRAME_SHORT ( sTypoAscender ),
+ FT_FRAME_SHORT ( sTypoDescender ),
+ FT_FRAME_SHORT ( sTypoLineGap ),
+ FT_FRAME_USHORT( usWinAscent ),
+ FT_FRAME_USHORT( usWinDescent ),
+ FT_FRAME_END
+ };
+
+ const FT_Frame_Field os2_fields_extra[] =
+ {
+ FT_FRAME_START( 8 ),
+ FT_FRAME_ULONG( ulCodePageRange1 ),
+ FT_FRAME_ULONG( ulCodePageRange2 ),
+ FT_FRAME_END
+ };
+
+ const FT_Frame_Field os2_fields_extra2[] =
+ {
+ FT_FRAME_START( 10 ),
+ FT_FRAME_SHORT ( sxHeight ),
+ FT_FRAME_SHORT ( sCapHeight ),
+ FT_FRAME_USHORT( usDefaultChar ),
+ FT_FRAME_USHORT( usBreakChar ),
+ FT_FRAME_USHORT( usMaxContext ),
+ FT_FRAME_END
+ };
+
+
+ FT_TRACE2(( "OS/2 Table " ));
+
+ /* We now support old Mac fonts where the OS/2 table doesn't */
+ /* exist. Simply put, we set the `version' field to 0xFFFF */
+ /* and test this value each time we need to access the table. */
+ error = face->goto_table( face, TTAG_OS2, stream, 0 );
+ if ( error )
+ {
+ FT_TRACE2(( "is missing!\n" ));
+ face->os2.version = 0xFFFFU;
+ error = SFNT_Err_Ok;
+ goto Exit;
+ }
+
+ os2 = &face->os2;
+
+ if ( FT_STREAM_READ_FIELDS( os2_fields, os2 ) )
+ goto Exit;
+
+ os2->ulCodePageRange1 = 0;
+ os2->ulCodePageRange2 = 0;
+ os2->sxHeight = 0;
+ os2->sCapHeight = 0;
+ os2->usDefaultChar = 0;
+ os2->usBreakChar = 0;
+ os2->usMaxContext = 0;
+
+ if ( os2->version >= 0x0001 )
+ {
+ /* only version 1 tables */
+ if ( FT_STREAM_READ_FIELDS( os2_fields_extra, os2 ) )
+ goto Exit;
+
+ if ( os2->version >= 0x0002 )
+ {
+ /* only version 2 tables */
+ if ( FT_STREAM_READ_FIELDS( os2_fields_extra2, os2 ) )
+ goto Exit;
+ }
+ }
+
+ FT_TRACE2(( "loaded\n" ));
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_postscript */
+ /* */
+ /* <Description> */
+ /* Loads the Postscript table. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: A handle to the input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_postscript( TT_Face face,
+ FT_Stream stream )
+ {
+ FT_Error error;
+ TT_Postscript* post = &face->postscript;
+
+ static const FT_Frame_Field post_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_Postscript
+
+ FT_FRAME_START( 32 ),
+ FT_FRAME_ULONG( FormatType ),
+ FT_FRAME_ULONG( italicAngle ),
+ FT_FRAME_SHORT( underlinePosition ),
+ FT_FRAME_SHORT( underlineThickness ),
+ FT_FRAME_ULONG( isFixedPitch ),
+ FT_FRAME_ULONG( minMemType42 ),
+ FT_FRAME_ULONG( maxMemType42 ),
+ FT_FRAME_ULONG( minMemType1 ),
+ FT_FRAME_ULONG( maxMemType1 ),
+ FT_FRAME_END
+ };
+
+
+ FT_TRACE2(( "PostScript " ));
+
+ error = face->goto_table( face, TTAG_post, stream, 0 );
+ if ( error )
+ return SFNT_Err_Post_Table_Missing;
+
+ if ( FT_STREAM_READ_FIELDS( post_fields, post ) )
+ return error;
+
+ /* we don't load the glyph names, we do that in another */
+ /* module (ttpost). */
+ FT_TRACE2(( "loaded\n" ));
+
+ return SFNT_Err_Ok;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_pclt */
+ /* */
+ /* <Description> */
+ /* Loads the PCL 5 Table. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: A handle to the input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_pclt( TT_Face face,
+ FT_Stream stream )
+ {
+ static const FT_Frame_Field pclt_fields[] =
+ {
+#undef FT_STRUCTURE
+#define FT_STRUCTURE TT_PCLT
+
+ FT_FRAME_START( 54 ),
+ FT_FRAME_ULONG ( Version ),
+ FT_FRAME_ULONG ( FontNumber ),
+ FT_FRAME_USHORT( Pitch ),
+ FT_FRAME_USHORT( xHeight ),
+ FT_FRAME_USHORT( Style ),
+ FT_FRAME_USHORT( TypeFamily ),
+ FT_FRAME_USHORT( CapHeight ),
+ FT_FRAME_BYTES ( TypeFace, 16 ),
+ FT_FRAME_BYTES ( CharacterComplement, 8 ),
+ FT_FRAME_BYTES ( FileName, 6 ),
+ FT_FRAME_CHAR ( StrokeWeight ),
+ FT_FRAME_CHAR ( WidthType ),
+ FT_FRAME_BYTE ( SerifStyle ),
+ FT_FRAME_BYTE ( Reserved ),
+ FT_FRAME_END
+ };
+
+ FT_Error error;
+ TT_PCLT* pclt = &face->pclt;
+
+
+ FT_TRACE2(( "PCLT " ));
+
+ /* optional table */
+ error = face->goto_table( face, TTAG_PCLT, stream, 0 );
+ if ( error )
+ {
+ FT_TRACE2(( "missing (optional)\n" ));
+ pclt->Version = 0;
+ return SFNT_Err_Ok;
+ }
+
+ if ( FT_STREAM_READ_FIELDS( pclt_fields, pclt ) )
+ goto Exit;
+
+ FT_TRACE2(( "loaded\n" ));
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_gasp */
+ /* */
+ /* <Description> */
+ /* Loads the `gasp' table into a face object. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: The input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_gasp( TT_Face face,
+ FT_Stream stream )
+ {
+ FT_Error error;
+ FT_Memory memory = stream->memory;
+
+ FT_UInt j,num_ranges;
+ TT_GaspRange gaspranges;
+
+
+ FT_TRACE2(( "tt_face_load_gasp: %08p\n", face ));
+
+ /* the gasp table is optional */
+ error = face->goto_table( face, TTAG_gasp, stream, 0 );
+ if ( error )
+ return SFNT_Err_Ok;
+
+ if ( FT_FRAME_ENTER( 4L ) )
+ goto Exit;
+
+ face->gasp.version = FT_GET_USHORT();
+ face->gasp.numRanges = FT_GET_USHORT();
+
+ FT_FRAME_EXIT();
+
+ num_ranges = face->gasp.numRanges;
+ FT_TRACE3(( "number of ranges = %d\n", num_ranges ));
+
+ if ( FT_NEW_ARRAY( gaspranges, num_ranges ) ||
+ FT_FRAME_ENTER( num_ranges * 4L ) )
+ goto Exit;
+
+ face->gasp.gaspRanges = gaspranges;
+
+ for ( j = 0; j < num_ranges; j++ )
+ {
+ gaspranges[j].maxPPEM = FT_GET_USHORT();
+ gaspranges[j].gaspFlag = FT_GET_USHORT();
+
+ FT_TRACE3(( " [max:%d flag:%d]",
+ gaspranges[j].maxPPEM,
+ gaspranges[j].gaspFlag ));
+ }
+ FT_TRACE3(( "\n" ));
+
+ FT_FRAME_EXIT();
+ FT_TRACE2(( "GASP loaded\n" ));
+
+ Exit:
+ return error;
+ }
+
+
+ FT_CALLBACK_DEF( int )
+ tt_kern_pair_compare( const void* a,
+ const void* b );
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_kern */
+ /* */
+ /* <Description> */
+ /* Loads the first kerning table with format 0 in the font. Only */
+ /* accepts the first horizontal kerning table. Developers should use */
+ /* the `ftxkern' extension to access other kerning tables in the font */
+ /* file, if they really want to. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: The input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_kern( TT_Face face,
+ FT_Stream stream )
+ {
+ FT_Error error;
+ FT_Memory memory = stream->memory;
+
+ FT_UInt n, num_tables;
+
+
+ /* the kern table is optional; exit silently if it is missing */
+ error = face->goto_table( face, TTAG_kern, stream, 0 );
+ if ( error )
+ return SFNT_Err_Ok;
+
+ if ( FT_FRAME_ENTER( 4L ) )
+ goto Exit;
+
+ (void)FT_GET_USHORT(); /* version */
+ num_tables = FT_GET_USHORT();
+
+ FT_FRAME_EXIT();
+
+ for ( n = 0; n < num_tables; n++ )
+ {
+ FT_UInt coverage;
+ FT_UInt length;
+
+
+ if ( FT_FRAME_ENTER( 6L ) )
+ goto Exit;
+
+ (void)FT_GET_USHORT(); /* version */
+ length = FT_GET_USHORT() - 6; /* substract header length */
+ coverage = FT_GET_USHORT();
+
+ FT_FRAME_EXIT();
+
+ if ( coverage == 0x0001 )
+ {
+ FT_UInt num_pairs;
+ TT_Kern0_Pair pair;
+ TT_Kern0_Pair limit;
+
+
+ /* found a horizontal format 0 kerning table! */
+ if ( FT_FRAME_ENTER( 8L ) )
+ goto Exit;
+
+ num_pairs = FT_GET_USHORT();
+
+ /* skip the rest */
+
+ FT_FRAME_EXIT();
+
+ /* allocate array of kerning pairs */
+ if ( FT_NEW_ARRAY( face->kern_pairs, num_pairs ) ||
+ FT_FRAME_ENTER( 6L * num_pairs ) )
+ goto Exit;
+
+ pair = face->kern_pairs;
+ limit = pair + num_pairs;
+ for ( ; pair < limit; pair++ )
+ {
+ pair->left = FT_GET_USHORT();
+ pair->right = FT_GET_USHORT();
+ pair->value = FT_GET_USHORT();
+ }
+
+ FT_FRAME_EXIT();
+
+ face->num_kern_pairs = num_pairs;
+ face->kern_table_index = n;
+
+ /* ensure that the kerning pair table is sorted (yes, some */
+ /* fonts have unsorted tables!) */
+ {
+ FT_UInt i;
+ TT_Kern0_Pair pair0;
+
+
+ pair0 = face->kern_pairs;
+
+ for ( i = 1; i < num_pairs; i++, pair0++ )
+ {
+ if ( tt_kern_pair_compare( pair0, pair0 + 1 ) != -1 )
+ {
+ ft_qsort( (void*)face->kern_pairs, (int)num_pairs,
+ sizeof ( TT_Kern0_PairRec ), tt_kern_pair_compare );
+ break;
+ }
+ }
+ }
+
+ goto Exit;
+ }
+
+ if ( FT_STREAM_SKIP( length ) )
+ goto Exit;
+ }
+
+ /* no kern table found -- doesn't matter */
+ face->kern_table_index = -1;
+ face->num_kern_pairs = 0;
+ face->kern_pairs = NULL;
+
+ Exit:
+ return error;
+ }
+
+
+#undef TT_KERN_INDEX
+#define TT_KERN_INDEX( g1, g2 ) ( ( (FT_ULong)g1 << 16 ) | g2 )
+
+
+ FT_CALLBACK_DEF( int )
+ tt_kern_pair_compare( const void* a,
+ const void* b )
+ {
+ TT_Kern0_Pair pair1 = (TT_Kern0_Pair)a;
+ TT_Kern0_Pair pair2 = (TT_Kern0_Pair)b;
+
+ FT_ULong index1 = TT_KERN_INDEX( pair1->left, pair1->right );
+ FT_ULong index2 = TT_KERN_INDEX( pair2->left, pair2->right );
+
+
+ return ( index1 < index2 ? -1 :
+ ( index1 > index2 ? 1 : 0 ));
+ }
+
+
+#undef TT_KERN_INDEX
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_load_hdmx */
+ /* */
+ /* <Description> */
+ /* Loads the horizontal device metrics table. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ /* stream :: A handle to the input stream. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ tt_face_load_hdmx( TT_Face face,
+ FT_Stream stream )
+ {
+ FT_Error error;
+ FT_Memory memory = stream->memory;
+
+ TT_Hdmx hdmx = &face->hdmx;
+ FT_Long num_glyphs;
+ FT_Long record_size;
+
+
+ hdmx->version = 0;
+ hdmx->num_records = 0;
+ hdmx->records = 0;
+
+ /* this table is optional */
+ error = face->goto_table( face, TTAG_hdmx, stream, 0 );
+ if ( error )
+ return SFNT_Err_Ok;
+
+ if ( FT_FRAME_ENTER( 8L ) )
+ goto Exit;
+
+ hdmx->version = FT_GET_USHORT();
+ hdmx->num_records = FT_GET_SHORT();
+ record_size = FT_GET_LONG();
+
+ FT_FRAME_EXIT();
+
+ /* Only recognize format 0 */
+ if ( hdmx->version != 0 )
+ goto Exit;
+
+ if ( FT_NEW_ARRAY( hdmx->records, hdmx->num_records ) )
+ goto Exit;
+
+ num_glyphs = face->root.num_glyphs;
+ record_size -= num_glyphs + 2;
+
+ {
+ TT_HdmxEntry cur = hdmx->records;
+ TT_HdmxEntry limit = cur + hdmx->num_records;
+
+
+ for ( ; cur < limit; cur++ )
+ {
+ /* read record */
+ if ( FT_READ_BYTE( cur->ppem ) ||
+ FT_READ_BYTE( cur->max_width ) )
+ goto Exit;
+
+ if ( FT_ALLOC( cur->widths, num_glyphs ) ||
+ FT_STREAM_READ( cur->widths, num_glyphs ) )
+ goto Exit;
+
+ /* skip padding bytes */
+ if ( record_size > 0 && FT_STREAM_SKIP( record_size ) )
+ goto Exit;
+ }
+ }
+
+ Exit:
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* tt_face_free_hdmx */
+ /* */
+ /* <Description> */
+ /* Frees the horizontal device metrics table. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the target face object. */
+ /* */
+ FT_LOCAL_DEF( void )
+ tt_face_free_hdmx( TT_Face face )
+ {
+ if ( face )
+ {
+ FT_Int n;
+ FT_Memory memory = face->root.driver->root.memory;
+
+
+ for ( n = 0; n < face->hdmx.num_records; n++ )
+ FT_FREE( face->hdmx.records[n].widths );
+
+ FT_FREE( face->hdmx.records );
+ face->hdmx.num_records = 0;
+ }
+ }
+
+
+/* END */
git://git.jankratochvil.net / reactos.git / blobdiff