+++ /dev/null
-/***************************************************************************/
-/* */
-/* sfobjs.c */
-/* */
-/* SFNT object management (base). */
-/* */
-/* Copyright 1996-2001 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 "sfobjs.h"
-#include "ttload.h"
-#include FT_INTERNAL_SFNT_H
-#include FT_INTERNAL_POSTSCRIPT_NAMES_H
-#include FT_TRUETYPE_IDS_H
-#include FT_TRUETYPE_TAGS_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_sfobjs
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Get_Name */
- /* */
- /* <Description> */
- /* Returns a given ENGLISH name record in ASCII. */
- /* */
- /* <Input> */
- /* face :: A handle to the source face object. */
- /* */
- /* nameid :: The name id of the name record to return. */
- /* */
- /* <Return> */
- /* Character string. NULL if no name is present. */
- /* */
- static FT_String*
- Get_Name( TT_Face face,
- FT_UShort nameid )
- {
- FT_Memory memory = face->root.memory;
- FT_UShort n;
- TT_NameRec* rec;
- FT_Bool wide_chars = 1;
-
-
- rec = face->name_table.names;
- for ( n = 0; n < face->name_table.numNameRecords; n++, rec++ )
- {
- if ( rec->nameID == nameid )
- {
- /* found the name -- now create an ASCII string from it */
- FT_Bool found = 0;
-
-
- /* test for Microsoft English language */
- if ( rec->platformID == TT_PLATFORM_MICROSOFT &&
- rec->encodingID <= TT_MS_ID_UNICODE_CS &&
- ( rec->languageID & 0x3FF ) == 0x009 )
- found = 1;
-
- /* test for Apple Unicode encoding */
- else if ( rec->platformID == TT_PLATFORM_APPLE_UNICODE )
- found = 1;
-
- /* test for Apple Roman */
- else if ( rec->platformID == TT_PLATFORM_MACINTOSH &&
- rec->languageID == TT_MAC_ID_ROMAN )
- {
- found = 1;
- wide_chars = 0;
- }
-
- /* found a Unicode name */
- if ( found )
- {
- FT_String* string;
- FT_UInt len;
-
-
- if ( wide_chars )
- {
- FT_UInt m;
-
-
- len = (FT_UInt)rec->stringLength / 2;
- if ( MEM_Alloc( string, len + 1 ) )
- return NULL;
-
- for ( m = 0; m < len; m ++ )
- string[m] = rec->string[2 * m + 1];
- }
- else
- {
- len = rec->stringLength;
- if ( MEM_Alloc( string, len + 1 ) )
- return NULL;
-
- MEM_Copy( string, rec->string, len );
- }
-
- string[len] = '\0';
- return string;
- }
- }
- }
-
- return NULL;
- }
-
-
- static FT_Encoding
- find_encoding( int platform_id,
- int encoding_id )
- {
- typedef struct TEncoding
- {
- int platform_id;
- int encoding_id;
- FT_Encoding encoding;
-
- } TEncoding;
-
- static
- const TEncoding tt_encodings[] =
- {
- { TT_PLATFORM_ISO, -1, ft_encoding_unicode },
-
- { TT_PLATFORM_APPLE_UNICODE, -1, ft_encoding_unicode },
-
- { TT_PLATFORM_MACINTOSH, TT_MAC_ID_ROMAN, ft_encoding_apple_roman },
-
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_SYMBOL_CS, ft_encoding_symbol },
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_UCS_4, ft_encoding_unicode },
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_UNICODE_CS, ft_encoding_unicode },
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_SJIS, ft_encoding_sjis },
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_GB2312, ft_encoding_gb2312 },
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_BIG_5, ft_encoding_big5 },
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_WANSUNG, ft_encoding_wansung },
- { TT_PLATFORM_MICROSOFT, TT_MS_ID_JOHAB, ft_encoding_johab }
- };
-
- const TEncoding *cur, *limit;
-
-
- cur = tt_encodings;
- limit = cur + sizeof ( tt_encodings ) / sizeof ( tt_encodings[0] );
-
- for ( ; cur < limit; cur++ )
- {
- if ( cur->platform_id == platform_id )
- {
- if ( cur->encoding_id == encoding_id ||
- cur->encoding_id == -1 )
- return cur->encoding;
- }
- }
-
- return ft_encoding_none;
- }
-
-
- FT_LOCAL_DEF FT_Error
- SFNT_Init_Face( FT_Stream stream,
- TT_Face face,
- FT_Int face_index,
- FT_Int num_params,
- FT_Parameter* params )
- {
- FT_Error error;
- FT_Library library = face->root.driver->root.library;
- SFNT_Interface* sfnt;
- SFNT_Header sfnt_header;
-
- /* for now, parameters are unused */
- FT_UNUSED( num_params );
- FT_UNUSED( params );
-
- sfnt = (SFNT_Interface*)face->sfnt;
- if ( !sfnt )
- {
- sfnt = (SFNT_Interface*)FT_Get_Module_Interface( library, "sfnt" );
- if ( !sfnt )
- {
- error = SFNT_Err_Invalid_File_Format;
- goto Exit;
- }
-
- face->sfnt = sfnt;
- face->goto_table = sfnt->goto_table;
- }
-
- if ( !face->psnames )
- {
- face->psnames = (PSNames_Interface*)
- FT_Get_Module_Interface( library, "psnames" );
- }
-
- /* check that we have a valid TrueType file */
- error = sfnt->load_sfnt_header( face, stream, face_index, &sfnt_header );
- if ( error )
- goto Exit;
-
- face->format_tag = sfnt_header.format_tag;
- face->num_tables = sfnt_header.num_tables;
-
- /* Load font directory */
- error = sfnt->load_directory( face, stream, &sfnt_header );
- if ( error )
- goto Exit;
-
- face->root.num_faces = face->ttc_header.count;
- if ( face->root.num_faces < 1 )
- face->root.num_faces = 1;
-
- Exit:
- return error;
- }
-
-
-#undef LOAD_
-#define LOAD_( x ) ( ( error = sfnt->load_##x( face, stream ) ) \
- != SFNT_Err_Ok )
-
-
- FT_LOCAL_DEF FT_Error
- SFNT_Load_Face( FT_Stream stream,
- TT_Face face,
- FT_Int face_index,
- FT_Int num_params,
- FT_Parameter* params )
- {
- FT_Error error;
- FT_Bool has_outline;
- FT_Bool is_apple_sbit;
-
- SFNT_Interface* sfnt = (SFNT_Interface*)face->sfnt;
-
- FT_UNUSED( face_index );
- FT_UNUSED( num_params );
- FT_UNUSED( params );
-
-
- /* Load tables */
-
- /* We now support two SFNT-based bitmapped font formats. They */
- /* are recognized easily as they do not include a `glyf' */
- /* table. */
- /* */
- /* The first format comes from Apple, and uses a table named */
- /* `bhed' instead of `head' to store the font header (using */
- /* the same format). It also doesn't include horizontal and */
- /* vertical metrics tables (i.e. `hhea' and `vhea' tables are */
- /* missing). */
- /* */
- /* The other format comes from Microsoft, and is used with */
- /* WinCE/PocketPC. It looks like a standard TTF, except that */
- /* it doesn't contain outlines. */
- /* */
-
- /* do we have outlines in there? */
- has_outline = FT_BOOL( ( TT_LookUp_Table( face, TTAG_glyf ) != 0 ) ||
- ( TT_LookUp_Table( face, TTAG_CFF ) != 0 ) );
- is_apple_sbit = 0;
-
-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
-
- /* if this font doesn't contain outlines, we try to load */
- /* a `bhed' table */
- if ( !has_outline )
- is_apple_sbit = FT_BOOL( !LOAD_( bitmap_header ) );
-
-#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
-
- /* load the font header (`head' table) if this isn't an Apple */
- /* sbit font file */
- if ( !is_apple_sbit && LOAD_( header ) )
- goto Exit;
-
- /* load other tables */
- if ( LOAD_( max_profile ) ||
- LOAD_( charmaps ) ||
- LOAD_( names ) ||
- LOAD_( psnames ) )
- goto Exit;
-
- /* do not load the metrics headers and tables if this is an Apple */
- /* sbit font file */
- if ( !is_apple_sbit )
- {
- /* load the `hhea' and `hmtx' tables at once */
- error = sfnt->load_metrics( face, stream, 0 );
- if ( error )
- goto Exit;
-
- /* try to load the `vhea' and `vmtx' tables at once */
- error = sfnt->load_metrics( face, stream, 1 );
- if ( error )
- goto Exit;
-
- if ( LOAD_( os2 ) )
- goto Exit;
- }
-
- /* the optional tables */
-
-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
-
- /* embedded bitmap support. */
- if ( sfnt->load_sbits && LOAD_( sbits ) )
- {
- /* return an error if this font file has no outlines */
- if ( error == SFNT_Err_Table_Missing && has_outline )
- error = SFNT_Err_Ok;
- else
- goto Exit;
- }
-#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
-
- if ( LOAD_( hdmx ) ||
- LOAD_( gasp ) ||
- LOAD_( kerning ) ||
- LOAD_( pclt ) )
- goto Exit;
-
-#ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
- if ( ( error = TT_Extension_Create( face ) ) != SFNT_Err_Ok )
- goto Exit;
-#endif
-
- face->root.family_name = Get_Name( face, TT_NAME_ID_FONT_FAMILY );
- face->root.style_name = Get_Name( face, TT_NAME_ID_FONT_SUBFAMILY );
-
- /* now set up root fields */
- {
- FT_Face root = &face->root;
- FT_Int flags = 0;
- TT_CharMap charmap;
- FT_Int n;
- FT_Memory memory;
-
-
- memory = root->memory;
-
- /*********************************************************************/
- /* */
- /* Compute face flags. */
- /* */
- if ( has_outline == TRUE )
- flags = FT_FACE_FLAG_SCALABLE; /* scalable outlines */
-
- flags |= FT_FACE_FLAG_SFNT | /* SFNT file format */
- FT_FACE_FLAG_HORIZONTAL; /* horizontal data */
-
-#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
- /* might need more polish to detect the presence of a Postscript */
- /* name table in the font */
- flags |= FT_FACE_FLAG_GLYPH_NAMES;
-#endif
-
- /* fixed width font? */
- if ( face->postscript.isFixedPitch )
- flags |= FT_FACE_FLAG_FIXED_WIDTH;
-
- /* vertical information? */
- if ( face->vertical_info )
- flags |= FT_FACE_FLAG_VERTICAL;
-
- /* kerning available ? */
- if ( face->kern_pairs )
- flags |= FT_FACE_FLAG_KERNING;
-
- root->face_flags = flags;
-
- /*********************************************************************/
- /* */
- /* Compute style flags. */
- /* */
- flags = 0;
- if ( has_outline == TRUE && face->os2.version != 0xFFFF )
- {
- /* we have an OS/2 table; use the `fsSelection' field */
- if ( face->os2.fsSelection & 1 )
- flags |= FT_STYLE_FLAG_ITALIC;
-
- if ( face->os2.fsSelection & 32 )
- flags |= FT_STYLE_FLAG_BOLD;
- }
- else
- {
- /* this is an old Mac font, use the header field */
- if ( face->header.Mac_Style & 1 )
- flags |= FT_STYLE_FLAG_BOLD;
-
- if ( face->header.Mac_Style & 2 )
- flags |= FT_STYLE_FLAG_ITALIC;
- }
-
- root->style_flags = flags;
-
- /*********************************************************************/
- /* */
- /* Polish the charmaps. */
- /* */
- /* Try to set the charmap encoding according to the platform & */
- /* encoding ID of each charmap. */
- /* */
- charmap = face->charmaps;
- root->num_charmaps = face->num_charmaps;
-
- /* allocate table of pointers */
- if ( ALLOC_ARRAY( root->charmaps, root->num_charmaps, FT_CharMap ) )
- goto Exit;
-
- for ( n = 0; n < root->num_charmaps; n++, charmap++ )
- {
- FT_Int platform = charmap->cmap.platformID;
- FT_Int encoding = charmap->cmap.platformEncodingID;
-
-
- charmap->root.face = (FT_Face)face;
- charmap->root.platform_id = (FT_UShort)platform;
- charmap->root.encoding_id = (FT_UShort)encoding;
- charmap->root.encoding = find_encoding( platform, encoding );
-
- /* now, set root->charmap with a unicode charmap */
- /* wherever available */
- if ( !root->charmap &&
- charmap->root.encoding == ft_encoding_unicode )
- root->charmap = (FT_CharMap)charmap;
-
- root->charmaps[n] = (FT_CharMap)charmap;
- }
-
-#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
-
- if ( face->num_sbit_strikes )
- {
- root->face_flags |= FT_FACE_FLAG_FIXED_SIZES;
-
-#if 0
- /* I don't know criteria whether layout is horizontal or vertical */
- if ( has_outline.... )
- {
- ...
- root->face_flags |= FT_FACE_FLAG_VERTICAL;
- }
-#endif
- root->num_fixed_sizes = face->num_sbit_strikes;
-
- if ( ALLOC_ARRAY( root->available_sizes,
- face->num_sbit_strikes,
- FT_Bitmap_Size ) )
- goto Exit;
-
- for ( n = 0 ; n < face->num_sbit_strikes ; n++ )
- {
- root->available_sizes[n].width =
- face->sbit_strikes[n].x_ppem;
-
- root->available_sizes[n].height =
- face->sbit_strikes[n].y_ppem;
- }
- }
- else
-
-#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
-
- {
- root->num_fixed_sizes = 0;
- root->available_sizes = 0;
- }
-
- /*********************************************************************/
- /* */
- /* Set up metrics. */
- /* */
- if ( has_outline == TRUE )
- {
- /* XXX What about if outline header is missing */
- /* (e.g. sfnt wrapped outline)? */
- root->bbox.xMin = face->header.xMin;
- root->bbox.yMin = face->header.yMin;
- root->bbox.xMax = face->header.xMax;
- root->bbox.yMax = face->header.yMax;
- root->units_per_EM = face->header.Units_Per_EM;
-
-
- /* XXX: Computing the ascender/descender/height is very different */
- /* from what the specification tells you. Apparently, we */
- /* must be careful because */
- /* */
- /* - not all fonts have an OS/2 table; in this case, we take */
- /* the values in the horizontal header. However, these */
- /* values very often are not reliable. */
- /* */
- /* - otherwise, the correct typographic values are in the */
- /* sTypoAscender, sTypoDescender & sTypoLineGap fields. */
- /* */
- /* However, certains fonts have these fields set to 0. */
- /* Rather, they have usWinAscent & usWinDescent correctly */
- /* set (but with different values). */
- /* */
- /* As an example, Arial Narrow is implemented through four */
- /* files ARIALN.TTF, ARIALNI.TTF, ARIALNB.TTF & ARIALNBI.TTF */
- /* */
- /* Strangely, all fonts have the same values in their */
- /* sTypoXXX fields, except ARIALNB which sets them to 0. */
- /* */
- /* On the other hand, they all have different */
- /* usWinAscent/Descent values -- as a conclusion, the OS/2 */
- /* table cannot be used to compute the text height reliably! */
- /* */
-
- /* The ascender/descender/height are computed from the OS/2 table */
- /* when found. Otherwise, they're taken from the horizontal */
- /* header. */
- /* */
-
- root->ascender = face->horizontal.Ascender;
- root->descender = face->horizontal.Descender;
-
- root->height = (FT_Short)( root->ascender - root->descender +
- face->horizontal.Line_Gap );
-
- /* if the line_gap is 0, we add an extra 15% to the text height -- */
- /* this computation is based on various versions of Times New Roman */
- if ( face->horizontal.Line_Gap == 0 )
- root->height = (FT_Short)( ( root->height * 115 + 50 ) / 100 );
-
-#if 0
-
- /* some fonts have the OS/2 "sTypoAscender", "sTypoDescender" & */
- /* "sTypoLineGap" fields set to 0, like ARIALNB.TTF */
- if ( face->os2.version != 0xFFFF && root->ascender )
- {
- FT_Int height;
-
-
- root->ascender = face->os2.sTypoAscender;
- root->descender = -face->os2.sTypoDescender;
-
- height = root->ascender + root->descender + face->os2.sTypoLineGap;
- if ( height > root->height )
- root->height = height;
- }
-
-#endif /* 0 */
-
- root->max_advance_width = face->horizontal.advance_Width_Max;
-
- root->max_advance_height = (FT_Short)( face->vertical_info
- ? face->vertical.advance_Height_Max
- : root->height );
-
- root->underline_position = face->postscript.underlinePosition;
- root->underline_thickness = face->postscript.underlineThickness;
-
- /* root->max_points -- already set up */
- /* root->max_contours -- already set up */
- }
- }
-
- Exit:
- return error;
- }
-
-
-#undef LOAD_
-
-
- FT_LOCAL_DEF void
- SFNT_Done_Face( TT_Face face )
- {
- FT_Memory memory = face->root.memory;
- SFNT_Interface* sfnt = (SFNT_Interface*)face->sfnt;
-
-
- if ( sfnt )
- {
- /* destroy the postscript names table if it is loaded */
- if ( sfnt->free_psnames )
- sfnt->free_psnames( face );
-
- /* destroy the embedded bitmaps table if it is loaded */
- if ( sfnt->free_sbits )
- sfnt->free_sbits( face );
- }
-
- /* freeing the kerning table */
- FREE( face->kern_pairs );
- face->num_kern_pairs = 0;
-
- /* freeing the collection table */
- FREE( face->ttc_header.offsets );
- face->ttc_header.count = 0;
-
- /* freeing table directory */
- FREE( face->dir_tables );
- face->num_tables = 0;
-
- /* freeing the character mapping tables */
- if ( sfnt && sfnt->load_charmaps )
- {
- FT_UShort n;
-
-
- for ( n = 0; n < face->num_charmaps; n++ )
- sfnt->free_charmap( face, &face->charmaps[n].cmap );
- }
-
- FREE( face->charmaps );
- face->num_charmaps = 0;
-
- FREE( face->root.charmaps );
- face->root.num_charmaps = 0;
- face->root.charmap = 0;
-
- /* freeing the horizontal metrics */
- FREE( face->horizontal.long_metrics );
- FREE( face->horizontal.short_metrics );
-
- /* freeing the vertical ones, if any */
- if ( face->vertical_info )
- {
- FREE( face->vertical.long_metrics );
- FREE( face->vertical.short_metrics );
- face->vertical_info = 0;
- }
-
- /* freeing the gasp table */
- FREE( face->gasp.gaspRanges );
- face->gasp.numRanges = 0;
-
- /* freeing the name table */
- sfnt->free_names( face );
-
- /* freeing the hdmx table */
- sfnt->free_hdmx( face );
-
- /* freeing family and style name */
- FREE( face->root.family_name );
- FREE( face->root.style_name );
-
- /* freeing sbit size table */
- face->root.num_fixed_sizes = 0;
- if ( face->root.available_sizes )
- FREE( face->root.available_sizes );
-
- face->sfnt = 0;
- }
-
-
-/* END */
projects / rrdtool.git / blobdiff