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kc3-lang/freetype/src/cff/cffobjs.c
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Author :
Werner Lemberg
Date : 2005-10-05 15:18:29
Hash : 7734a1f7
Message : Add FT_FACE_FLAG_HINTER to indicate that a specific font driver has a hinting engine of its own. * include/freetype/freetype.h (FT_FACE_FLAG_HINTER): New macro. * src/cff/cffobjs.c (cff_face_init), src/cid/cidobjs.c (cid_face_init), src/truetype/ttobjs.c (tt_face_init) [TT_CONFIG_OPTION_BYTECODE_INTERPRETER], src/type1/t1objs.c (T1_Face_Init), src/type42/t42objs.c (T42_Face_Init) [TT_CONFIG_OPTION_BYTECODE_INTERPRETER]: Update face flags. * docs/CHANGES: Document it.
- src/cff/cffobjs.c
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/***************************************************************************/ /* */ /* cffobjs.c */ /* */ /* OpenType objects manager (body). */ /* */ /* Copyright 1996-2001, 2002, 2003, 2004, 2005 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_CALC_H #include FT_INTERNAL_STREAM_H #include FT_ERRORS_H #include FT_TRUETYPE_IDS_H #include FT_TRUETYPE_TAGS_H #include FT_INTERNAL_SFNT_H #include FT_SERVICE_POSTSCRIPT_CMAPS_H #include FT_INTERNAL_POSTSCRIPT_HINTS_H #include "cffobjs.h" #include "cffload.h" #include "cffcmap.h" #include "cfferrs.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_cffobjs /*************************************************************************/ /* */ /* SIZE FUNCTIONS */ /* */ /* Note that we store the global hints in the size's `internal' root */ /* field. */ /* */ /*************************************************************************/ #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS static FT_Error sbit_size_reset( CFF_Size size ) { CFF_Face face; FT_Error error = CFF_Err_Ok; FT_ULong strike_index; FT_Size_Metrics* metrics; FT_Size_Metrics* sbit_metrics; SFNT_Service sfnt; metrics = &size->root.metrics; face = (CFF_Face)size->root.face; sfnt = (SFNT_Service)face->sfnt; sbit_metrics = &size->strike_metrics; error = sfnt->set_sbit_strike( face, metrics->x_ppem, metrics->y_ppem, &strike_index ); if ( !error ) { /* XXX: TODO: move this code to the SFNT module where it belongs */ #ifdef FT_OPTIMIZE_MEMORY FT_Byte* strike = face->sbit_table + 8 + strike_index*48; sbit_metrics->ascender = (FT_Char)strike[16] << 6; /* hori.ascender */ sbit_metrics->descender = (FT_Char)strike[17] << 6; /* hori.descender */ /* XXX: Is this correct? */ sbit_metrics->max_advance = ( (FT_Char)strike[22] + /* min_origin_SB */ strike[18] + /* max_width */ (FT_Char)strike[23] /* min_advance_SB */ ) << 6; #else /* !OPTIMIZE_MEMORY */ TT_SBit_Strike strike = face->sbit_strikes + strike_index; sbit_metrics->ascender = strike->hori.ascender << 6; sbit_metrics->descender = strike->hori.descender << 6; /* XXX: Is this correct? */ sbit_metrics->max_advance = ( strike->hori.min_origin_SB + strike->hori.max_width + strike->hori.min_advance_SB ) << 6; #endif /* !OPTIMIZE_MEMORY */ /* XXX: Is this correct? */ sbit_metrics->height = sbit_metrics->ascender - sbit_metrics->descender; sbit_metrics->x_ppem = metrics->x_ppem; sbit_metrics->y_ppem = metrics->y_ppem; size->strike_index = (FT_UInt)strike_index; } else { size->strike_index = 0xFFFFU; sbit_metrics->x_ppem = 0; sbit_metrics->y_ppem = 0; sbit_metrics->ascender = 0; sbit_metrics->descender = 0; sbit_metrics->height = 0; sbit_metrics->max_advance = 0; } return error; } #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ static PSH_Globals_Funcs cff_size_get_globals_funcs( CFF_Size size ) { CFF_Face face = (CFF_Face)size->root.face; CFF_Font font = (CFF_FontRec *)face->extra.data; PSHinter_Service pshinter = (PSHinter_Service)font->pshinter; FT_Module module; module = FT_Get_Module( size->root.face->driver->root.library, "pshinter" ); return ( module && pshinter && pshinter->get_globals_funcs ) ? pshinter->get_globals_funcs( module ) : 0; } FT_LOCAL_DEF( void ) cff_size_done( FT_Size cffsize ) /* CFF_Size */ { CFF_Size size = (CFF_Size)cffsize; if ( cffsize->internal ) { PSH_Globals_Funcs funcs; funcs = cff_size_get_globals_funcs( size ); if ( funcs ) funcs->destroy( (PSH_Globals)cffsize->internal ); cffsize->internal = 0; } } FT_LOCAL_DEF( FT_Error ) cff_size_init( FT_Size cffsize ) /* CFF_Size */ { CFF_Size size = (CFF_Size)cffsize; FT_Error error = CFF_Err_Ok; PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size ); if ( funcs ) { PSH_Globals globals; CFF_Face face = (CFF_Face)cffsize->face; CFF_Font font = (CFF_FontRec *)face->extra.data; CFF_SubFont subfont = &font->top_font; CFF_Private cpriv = &subfont->private_dict; PS_PrivateRec priv; /* IMPORTANT: The CFF and Type1 private dictionaries have */ /* slightly different structures; we need to */ /* synthetize a type1 dictionary on the fly here. */ { FT_UInt n, count; FT_MEM_ZERO( &priv, sizeof ( priv ) ); count = priv.num_blue_values = cpriv->num_blue_values; for ( n = 0; n < count; n++ ) priv.blue_values[n] = (FT_Short)cpriv->blue_values[n]; count = priv.num_other_blues = cpriv->num_other_blues; for ( n = 0; n < count; n++ ) priv.other_blues[n] = (FT_Short)cpriv->other_blues[n]; count = priv.num_family_blues = cpriv->num_family_blues; for ( n = 0; n < count; n++ ) priv.family_blues[n] = (FT_Short)cpriv->family_blues[n]; count = priv.num_family_other_blues = cpriv->num_family_other_blues; for ( n = 0; n < count; n++ ) priv.family_other_blues[n] = (FT_Short)cpriv->family_other_blues[n]; priv.blue_scale = cpriv->blue_scale; priv.blue_shift = (FT_Int)cpriv->blue_shift; priv.blue_fuzz = (FT_Int)cpriv->blue_fuzz; priv.standard_width[0] = (FT_UShort)cpriv->standard_width; priv.standard_height[0] = (FT_UShort)cpriv->standard_height; count = priv.num_snap_widths = cpriv->num_snap_widths; for ( n = 0; n < count; n++ ) priv.snap_widths[n] = (FT_Short)cpriv->snap_widths[n]; count = priv.num_snap_heights = cpriv->num_snap_heights; for ( n = 0; n < count; n++ ) priv.snap_heights[n] = (FT_Short)cpriv->snap_heights[n]; priv.force_bold = cpriv->force_bold; priv.language_group = cpriv->language_group; priv.lenIV = cpriv->lenIV; } error = funcs->create( cffsize->face->memory, &priv, &globals ); if ( !error ) cffsize->internal = (FT_Size_Internal)(void*)globals; } return error; } FT_LOCAL_DEF( FT_Error ) cff_size_reset( FT_Size cffsize, /* CFF_Size */ FT_UInt char_width, FT_UInt char_height ) { CFF_Size size = (CFF_Size)cffsize; PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size ); FT_Error error = CFF_Err_Ok; FT_Face face = cffsize->face; FT_UNUSED( char_width ); FT_UNUSED( char_height ); if ( funcs ) error = funcs->set_scale( (PSH_Globals)cffsize->internal, cffsize->metrics.x_scale, cffsize->metrics.y_scale, 0, 0 ); #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS if ( face->face_flags & FT_FACE_FLAG_FIXED_SIZES ) { error = sbit_size_reset( size ); if ( !error && !( face->face_flags & FT_FACE_FLAG_SCALABLE ) ) cffsize->metrics = size->strike_metrics; } #endif if ( face->face_flags & FT_FACE_FLAG_SCALABLE ) return CFF_Err_Ok; else return error; } FT_LOCAL_DEF( FT_Error ) cff_point_size_reset( FT_Size cffsize, FT_F26Dot6 char_width, FT_F26Dot6 char_height, FT_UInt horz_resolution, FT_UInt vert_resolution ) { FT_UNUSED( char_width ); FT_UNUSED( char_height ); FT_UNUSED( horz_resolution ); FT_UNUSED( vert_resolution ); return cff_size_reset( cffsize, 0, 0 ); } /*************************************************************************/ /* */ /* SLOT FUNCTIONS */ /* */ /*************************************************************************/ FT_LOCAL_DEF( void ) cff_slot_done( FT_GlyphSlot slot ) { slot->internal->glyph_hints = 0; } FT_LOCAL_DEF( FT_Error ) cff_slot_init( FT_GlyphSlot slot ) { CFF_Face face = (CFF_Face)slot->face; CFF_Font font = (CFF_FontRec *)face->extra.data; PSHinter_Service pshinter = (PSHinter_Service)font->pshinter; if ( pshinter ) { FT_Module module; module = FT_Get_Module( slot->face->driver->root.library, "pshinter" ); if ( module ) { T2_Hints_Funcs funcs; funcs = pshinter->get_t2_funcs( module ); slot->internal->glyph_hints = (void*)funcs; } } return 0; } /*************************************************************************/ /* */ /* FACE FUNCTIONS */ /* */ /*************************************************************************/ static FT_String* cff_strcpy( FT_Memory memory, const FT_String* source ) { FT_Error error; FT_String* result = 0; FT_Int len = (FT_Int)ft_strlen( source ); if ( !FT_ALLOC( result, len + 1 ) ) { FT_MEM_COPY( result, source, len ); result[len] = 0; } FT_UNUSED( error ); return result; } FT_LOCAL_DEF( FT_Error ) cff_face_init( FT_Stream stream, FT_Face cffface, /* CFF_Face */ FT_Int face_index, FT_Int num_params, FT_Parameter* params ) { CFF_Face face = (CFF_Face)cffface; FT_Error error; SFNT_Service sfnt; FT_Service_PsCMaps psnames; PSHinter_Service pshinter; FT_Bool pure_cff = 1; FT_Bool sfnt_format = 0; #if 0 FT_FACE_FIND_GLOBAL_SERVICE( face, sfnt, SFNT ); FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_NAMES ); FT_FACE_FIND_GLOBAL_SERVICE( face, pshinter, POSTSCRIPT_HINTER ); if ( !sfnt ) goto Bad_Format; #else sfnt = (SFNT_Service)FT_Get_Module_Interface( cffface->driver->root.library, "sfnt" ); if ( !sfnt ) goto Bad_Format; FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); pshinter = (PSHinter_Service)FT_Get_Module_Interface( cffface->driver->root.library, "pshinter" ); #endif /* create input stream from resource */ if ( FT_STREAM_SEEK( 0 ) ) goto Exit; /* check whether we have a valid OpenType file */ error = sfnt->init_face( stream, face, face_index, num_params, params ); if ( !error ) { if ( face->format_tag != 0x4F54544FL ) /* `OTTO'; OpenType/CFF font */ { FT_TRACE2(( "[not a valid OpenType/CFF font]\n" )); goto Bad_Format; } /* if we are performing a simple font format check, exit immediately */ if ( face_index < 0 ) return CFF_Err_Ok; /* UNDOCUMENTED! A CFF in an SFNT can have only a single font. */ if ( face_index > 0 ) { FT_ERROR(( "cff_face_init: invalid face index\n" )); error = CFF_Err_Invalid_Argument; goto Exit; } sfnt_format = 1; /* now, the font can be either an OpenType/CFF font, or an SVG CEF */ /* font; in the latter case it doesn't have a `head' table */ error = face->goto_table( face, TTAG_head, stream, 0 ); if ( !error ) { pure_cff = 0; /* load font directory */ error = sfnt->load_face( stream, face, face_index, num_params, params ); if ( error ) goto Exit; } else { /* load the `cmap' table explicitly */ error = sfnt->load_charmaps( face, stream ); if ( error ) goto Exit; /* XXX: we don't load the GPOS table, as OpenType Layout */ /* support will be added later to a layout library on top of */ /* FreeType 2 */ } /* now load the CFF part of the file */ error = face->goto_table( face, TTAG_CFF, stream, 0 ); if ( error ) goto Exit; } else { /* rewind to start of file; we are going to load a pure-CFF font */ if ( FT_STREAM_SEEK( 0 ) ) goto Exit; error = CFF_Err_Ok; } /* now load and parse the CFF table in the file */ { CFF_Font cff; CFF_FontRecDict dict; FT_Memory memory = cffface->memory; FT_Int32 flags; FT_UInt i; if ( FT_NEW( cff ) ) goto Exit; face->extra.data = cff; error = cff_font_load( stream, face_index, cff ); if ( error ) goto Exit; cff->pshinter = pshinter; cff->psnames = (void*)psnames; /* Complement the root flags with some interesting information. */ /* Note that this is only necessary for pure CFF and CEF fonts; */ /* SFNT based fonts use the `name' table instead. */ cffface->num_glyphs = cff->num_glyphs; dict = &cff->top_font.font_dict; /* we need the `PSNames' module for CFF and CEF formats */ /* which aren't CID-keyed */ if ( dict->cid_registry == 0xFFFFU && !psnames ) { FT_ERROR(( "cff_face_init:" )); FT_ERROR(( " cannot open CFF & CEF fonts\n" )); FT_ERROR(( " " )); FT_ERROR(( " without the `PSNames' module\n" )); goto Bad_Format; } if ( pure_cff ) { char* style_name = NULL; /* set up num_faces */ cffface->num_faces = cff->num_faces; /* compute number of glyphs */ if ( dict->cid_registry != 0xFFFFU ) cffface->num_glyphs = dict->cid_count; else cffface->num_glyphs = cff->charstrings_index.count; /* set global bbox, as well as EM size */ cffface->bbox.xMin = dict->font_bbox.xMin >> 16; cffface->bbox.yMin = dict->font_bbox.yMin >> 16; cffface->bbox.xMax = ( dict->font_bbox.xMax + 0xFFFFU ) >> 16; cffface->bbox.yMax = ( dict->font_bbox.yMax + 0xFFFFU ) >> 16; cffface->ascender = (FT_Short)( cffface->bbox.yMax ); cffface->descender = (FT_Short)( cffface->bbox.yMin ); cffface->height = (FT_Short)( ( ( cffface->ascender - cffface->descender ) * 12 ) / 10 ); if ( !dict->units_per_em ) dict->units_per_em = 1000; cffface->units_per_EM = dict->units_per_em; cffface->underline_position = (FT_Short)( dict->underline_position >> 16 ); cffface->underline_thickness = (FT_Short)( dict->underline_thickness >> 16 ); /* retrieve font family & style name */ cffface->family_name = cff_index_get_name( &cff->name_index, face_index ); if ( cffface->family_name ) { char* full = cff_index_get_sid_string( &cff->string_index, dict->full_name, psnames ); char* fullp = full; char* family = cffface->family_name; char* family_name = 0; if ( dict->family_name ) { family_name = cff_index_get_sid_string( &cff->string_index, dict->family_name, psnames); if ( family_name ) family = family_name; } /* We try to extract the style name from the full name. */ /* We need to ignore spaces and dashes during the search. */ if ( full && family ) { while ( *fullp ) { /* skip common characters at the start of both strings */ if ( *fullp == *family ) { family++; fullp++; continue; } /* ignore spaces and dashes in full name during comparison */ if ( *fullp == ' ' || *fullp == '-' ) { fullp++; continue; } /* ignore spaces and dashes in family name during comparison */ if ( *family == ' ' || *family == '-' ) { family++; continue; } if ( !*family && *fullp ) { /* The full name begins with the same characters as the */ /* family name, with spaces and dashes removed. In this */ /* case, the remaining string in `fullp' will be used as */ /* the style name. */ style_name = cff_strcpy( memory, fullp ); } break; } if ( family_name ) FT_FREE( family_name ); FT_FREE( full ); } } else { char *cid_font_name = cff_index_get_sid_string( &cff->string_index, dict->cid_font_name, psnames ); /* do we have a `/FontName' for a CID-keyed font? */ if ( cid_font_name ) cffface->family_name = cid_font_name; } if ( style_name ) cffface->style_name = style_name; else /* assume "Regular" style if we don't know better */ cffface->style_name = cff_strcpy( memory, (char *)"Regular" ); /*******************************************************************/ /* */ /* Compute face flags. */ /* */ flags = FT_FACE_FLAG_SCALABLE | /* scalable outlines */ FT_FACE_FLAG_HORIZONTAL | /* horizontal data */ FT_FACE_FLAG_HINTER; /* has native hinter */ if ( sfnt_format ) flags |= FT_FACE_FLAG_SFNT; /* fixed width font? */ if ( dict->is_fixed_pitch ) flags |= FT_FACE_FLAG_FIXED_WIDTH; /* XXX: WE DO NOT SUPPORT KERNING METRICS IN THE GPOS TABLE FOR NOW */ #if 0 /* kerning available? */ if ( face->kern_pairs ) flags |= FT_FACE_FLAG_KERNING; #endif cffface->face_flags = flags; /*******************************************************************/ /* */ /* Compute style flags. */ /* */ flags = 0; if ( dict->italic_angle ) flags |= FT_STYLE_FLAG_ITALIC; { char *weight = cff_index_get_sid_string( &cff->string_index, dict->weight, psnames ); if ( weight ) if ( !ft_strcmp( weight, "Bold" ) || !ft_strcmp( weight, "Black" ) ) flags |= FT_STYLE_FLAG_BOLD; FT_FREE( weight ); } /* double check */ if ( !(flags & FT_STYLE_FLAG_BOLD) && cffface->style_name ) if ( !strncmp( cffface->style_name, "Bold", 4 ) || !strncmp( cffface->style_name, "Black", 5 ) ) flags |= FT_STYLE_FLAG_BOLD; cffface->style_flags = flags; } else { if ( !dict->units_per_em ) dict->units_per_em = face->root.units_per_EM; } /* handle font matrix settings in subfonts (if any) */ for ( i = cff->num_subfonts; i > 0; i-- ) { CFF_FontRecDict sub = &cff->subfonts[i - 1]->font_dict; CFF_FontRecDict top = &cff->top_font.font_dict; if ( sub->units_per_em ) { FT_Matrix scale; scale.xx = scale.yy = (FT_Fixed)FT_DivFix( top->units_per_em, sub->units_per_em ); scale.xy = scale.yx = 0; FT_Matrix_Multiply( &scale, &sub->font_matrix ); FT_Vector_Transform( &sub->font_offset, &scale ); } else { sub->font_matrix = top->font_matrix; sub->font_offset = top->font_offset; } } #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES /* CID-keyed CFF fonts don't have glyph names -- the SFNT loader */ /* has unset this flag because of the 3.0 `post' table */ if ( dict->cid_registry == 0xFFFFU ) cffface->face_flags |= FT_FACE_FLAG_GLYPH_NAMES; #endif /*******************************************************************/ /* */ /* Compute char maps. */ /* */ /* Try to synthetize a Unicode charmap if there is none available */ /* already. If an OpenType font contains a Unicode "cmap", we */ /* will use it, whatever be in the CFF part of the file. */ { FT_CharMapRec cmaprec; FT_CharMap cmap; FT_UInt nn; CFF_Encoding encoding = &cff->encoding; for ( nn = 0; nn < (FT_UInt)cffface->num_charmaps; nn++ ) { cmap = cffface->charmaps[nn]; /* Windows Unicode (3,1)? */ if ( cmap->platform_id == 3 && cmap->encoding_id == 1 ) goto Skip_Unicode; /* Deprecated Unicode platform id? */ if ( cmap->platform_id == 0 ) goto Skip_Unicode; /* Standard Unicode (deprecated) */ } /* since CID-keyed fonts don't contain glyph names, we can't */ /* construct a cmap */ if ( pure_cff && cff->top_font.font_dict.cid_registry != 0xFFFFU ) goto Exit; /* we didn't find a Unicode charmap -- synthetize one */ cmaprec.face = cffface; cmaprec.platform_id = 3; cmaprec.encoding_id = 1; cmaprec.encoding = FT_ENCODING_UNICODE; nn = (FT_UInt)cffface->num_charmaps; FT_CMap_New( &cff_cmap_unicode_class_rec, NULL, &cmaprec, NULL ); /* if no Unicode charmap was previously selected, select this one */ if ( cffface->charmap == NULL && nn != (FT_UInt)cffface->num_charmaps ) cffface->charmap = cffface->charmaps[nn]; Skip_Unicode: if ( encoding->count > 0 ) { FT_CMap_Class clazz; cmaprec.face = cffface; cmaprec.platform_id = 7; /* Adobe platform id */ if ( encoding->offset == 0 ) { cmaprec.encoding_id = TT_ADOBE_ID_STANDARD; cmaprec.encoding = FT_ENCODING_ADOBE_STANDARD; clazz = &cff_cmap_encoding_class_rec; } else if ( encoding->offset == 1 ) { cmaprec.encoding_id = TT_ADOBE_ID_EXPERT; cmaprec.encoding = FT_ENCODING_ADOBE_EXPERT; clazz = &cff_cmap_encoding_class_rec; } else { cmaprec.encoding_id = TT_ADOBE_ID_CUSTOM; cmaprec.encoding = FT_ENCODING_ADOBE_CUSTOM; clazz = &cff_cmap_encoding_class_rec; } FT_CMap_New( clazz, NULL, &cmaprec, NULL ); } } } Exit: return error; Bad_Format: error = CFF_Err_Unknown_File_Format; goto Exit; } FT_LOCAL_DEF( void ) cff_face_done( FT_Face cffface ) /* CFF_Face */ { CFF_Face face = (CFF_Face)cffface; FT_Memory memory = cffface->memory; SFNT_Service sfnt = (SFNT_Service)face->sfnt; if ( sfnt ) sfnt->done_face( face ); { CFF_Font cff = (CFF_Font)face->extra.data; if ( cff ) { cff_font_done( cff ); FT_FREE( face->extra.data ); } } } FT_LOCAL_DEF( FT_Error ) cff_driver_init( FT_Module module ) { FT_UNUSED( module ); return CFF_Err_Ok; } FT_LOCAL_DEF( void ) cff_driver_done( FT_Module module ) { FT_UNUSED( module ); } /* END */