ref: 1018d7a7091fd5e0433f501a3474cdc3fec322cc
dir: /libfreetype/cffobjs.c/
/***************************************************************************/ /* */ /* cffobjs.c */ /* */ /* OpenType objects manager (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_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_INTERNAL_POSTSCRIPT_NAMES_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. */ /* */ /*************************************************************************/ static PSH_Globals_Funcs cff_size_get_globals_funcs( CFF_Size size ) { CFF_Face face = (CFF_Face)size->face; CFF_Font font = (CFF_FontRec *)face->extra.data; PSHinter_Service pshinter = (PSHinter_Service)font->pshinter; FT_Module module; module = FT_Get_Module( size->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( CFF_Size size ) { if ( size->internal ) { PSH_Globals_Funcs funcs; funcs = cff_size_get_globals_funcs( size ); if ( funcs ) funcs->destroy( (PSH_Globals)size->internal ); size->internal = 0; } } FT_LOCAL_DEF( FT_Error ) cff_size_init( CFF_Size size ) { FT_Error error = 0; PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size ); if ( funcs ) { PSH_Globals globals; CFF_Face face = (CFF_Face)size->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( size->face->memory, &priv, &globals ); if ( !error ) size->internal = (FT_Size_Internal)(void*)globals; } return error; } FT_LOCAL_DEF( FT_Error ) cff_size_reset( CFF_Size size ) { PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size ); FT_Error error = 0; if ( funcs ) error = funcs->set_scale( (PSH_Globals)size->internal, size->metrics.x_scale, size->metrics.y_scale, 0, 0 ); return error; } /*************************************************************************/ /* */ /* SLOT FUNCTIONS */ /* */ /*************************************************************************/ FT_LOCAL_DEF( void ) cff_slot_done( CFF_GlyphSlot slot ) { slot->root.internal->glyph_hints = 0; } FT_LOCAL_DEF( FT_Error ) cff_slot_init( CFF_GlyphSlot slot ) { CFF_Face face = (CFF_Face)slot->root.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->root.face->driver->root.library, "pshinter" ); if ( module ) { T2_Hints_Funcs funcs; funcs = pshinter->get_t2_funcs( module ); slot->root.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, CFF_Face face, FT_Int face_index, FT_Int num_params, FT_Parameter* params ) { FT_Error error; SFNT_Service sfnt; PSNames_Service psnames; PSHinter_Service pshinter; FT_Bool pure_cff = 1; FT_Bool sfnt_format = 0; sfnt = (SFNT_Service)FT_Get_Module_Interface( face->root.driver->root.library, "sfnt" ); if ( !sfnt ) goto Bad_Format; psnames = (PSNames_Service)FT_Get_Module_Interface( face->root.driver->root.library, "psnames" ); pshinter = (PSHinter_Service)FT_Get_Module_Interface( face->root.driver->root.library, "pshinter" ); /* create input stream from resource */ if ( FT_STREAM_SEEK( 0 ) ) goto Exit; /* check that 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; sfnt_format = 1; /* now, the font can be either an OpenType/CFF font, or an SVG CEF */ /* font in the later 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 by hand */ 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; FT_Memory memory = face->root.memory; FT_Face root; FT_Int32 flags; 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 = psnames; /* Complement the root flags with some interesting information. */ /* Note that this is only necessary for pure CFF and CEF fonts. */ root = &face->root; root->num_glyphs = cff->num_glyphs; if ( pure_cff ) { CFF_FontRecDict dict = &cff->top_font.font_dict; /* we need the `PSNames' module for pure-CFF and CEF formats */ if ( !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; } /* Set up num_faces. */ root->num_faces = cff->num_faces; /* compute number of glyphs */ if ( dict->cid_registry ) root->num_glyphs = dict->cid_count; else root->num_glyphs = cff->charstrings_index.count; /* set global bbox, as well as EM size */ root->bbox.xMin = dict->font_bbox.xMin >> 16; root->bbox.yMin = dict->font_bbox.yMin >> 16; root->bbox.xMax = ( dict->font_bbox.xMax + 0xFFFFU ) >> 16; root->bbox.yMax = ( dict->font_bbox.yMax + 0xFFFFU ) >> 16; root->ascender = (FT_Short)( root->bbox.yMax ); root->descender = (FT_Short)( root->bbox.yMin ); root->height = (FT_Short)( ( ( root->ascender - root->descender ) * 12 ) / 10 ); if ( dict->units_per_em ) root->units_per_EM = dict->units_per_em; else root->units_per_EM = 1000; /* retrieve font family & style name */ root->family_name = cff_index_get_name( &cff->name_index, face_index ); if ( dict->cid_registry ) root->style_name = cff_strcpy( memory, "Regular" ); /* XXXX */ else root->style_name = cff_index_get_sid_string( &cff->string_index, dict->weight, psnames ); /*******************************************************************/ /* */ /* Compute face flags. */ /* */ flags = FT_FACE_FLAG_SCALABLE | /* scalable outlines */ FT_FACE_FLAG_HORIZONTAL; /* horizontal data */ 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 #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES flags |= FT_FACE_FLAG_GLYPH_NAMES; #endif root->face_flags = flags; /*******************************************************************/ /* */ /* Compute style flags. */ /* */ flags = 0; if ( dict->italic_angle ) flags |= FT_STYLE_FLAG_ITALIC; /* XXX: may not be correct */ if ( cff->top_font.private_dict.force_bold ) flags |= FT_STYLE_FLAG_BOLD; root->style_flags = flags; } /*******************************************************************/ /* */ /* 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) root->num_charmaps; nn++ ) { cmap = root->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) */ } /* we didn't find a Unicode charmap, synthetize one */ cmaprec.face = root; cmaprec.platform_id = 3; cmaprec.encoding_id = 1; cmaprec.encoding = FT_ENCODING_UNICODE; nn = (FT_UInt) root->num_charmaps; FT_CMap_New( &cff_cmap_unicode_class_rec, NULL, &cmaprec, NULL ); /* if no Unicode charmap was previously selected, select this one */ if ( root->charmap == NULL && nn != (FT_UInt) root->num_charmaps ) root->charmap = root->charmaps[nn]; Skip_Unicode: if ( encoding->count > 0 ) { FT_CMap_Class clazz; cmaprec.face = root; cmaprec.platform_id = 7; /* Adobe platform id */ if ( encoding->offset == 0 ) { cmaprec.encoding_id = 0; cmaprec.encoding = FT_ENCODING_ADOBE_STANDARD; clazz = &cff_cmap_encoding_class_rec; } else if ( encoding->offset == 1 ) { cmaprec.encoding_id = 1; cmaprec.encoding = FT_ENCODING_ADOBE_EXPERT; clazz = &cff_cmap_encoding_class_rec; } else { cmaprec.encoding_id = 3; 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( CFF_Face face ) { FT_Memory memory = face->root.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( CFF_Driver driver ) { FT_UNUSED( driver ); return CFF_Err_Ok; } FT_LOCAL_DEF( void ) cff_driver_done( CFF_Driver driver ) { FT_UNUSED( driver ); } /* END */