/**************************************************************************** * * cffload.c * * OpenType and CFF data/program tables loader (body). * * Copyright (C) 1996-2023 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 <freetype/internal/ftdebug.h> #include <freetype/internal/ftobjs.h> #include <freetype/internal/ftstream.h> #include <freetype/tttags.h> #include <freetype/t1tables.h> #include <freetype/internal/psaux.h> #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT #include <freetype/ftmm.h> #include <freetype/internal/services/svmm.h> #endif #include "cffload.h" #include "cffparse.h" #include "cfferrs.h" #define FT_FIXED_ONE … #if 1 static const FT_UShort cff_isoadobe_charset[229] = …; static const FT_UShort cff_expert_charset[166] = …; static const FT_UShort cff_expertsubset_charset[87] = …; static const FT_UShort cff_standard_encoding[256] = …; static const FT_UShort cff_expert_encoding[256] = …; #endif /* 1 */ FT_LOCAL_DEF( FT_UShort ) cff_get_standard_encoding( FT_UInt charcode ) { … } /************************************************************************** * * 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 … /* read an offset from the index's stream current position */ static FT_ULong cff_index_read_offset( CFF_Index idx, FT_Error *errorp ) { … } static FT_Error cff_index_init( CFF_Index idx, FT_Stream stream, FT_Bool load, FT_Bool cff2 ) { … } static void cff_index_done( CFF_Index idx ) { … } static FT_Error cff_index_load_offsets( CFF_Index idx ) { … } /* Allocate a table containing pointers to an index's elements. */ /* The `pool' argument makes this function convert the index */ /* entries to C-style strings (that is, null-terminated). */ static FT_Error cff_index_get_pointers( CFF_Index idx, FT_Byte*** table, FT_Byte** pool, FT_ULong* pool_size ) { … } FT_LOCAL_DEF( FT_Error ) cff_index_access_element( CFF_Index idx, FT_UInt element, FT_Byte** pbytes, FT_ULong* pbyte_len ) { … } FT_LOCAL_DEF( void ) cff_index_forget_element( CFF_Index idx, FT_Byte** pbytes ) { … } /* get an entry from Name INDEX */ FT_LOCAL_DEF( FT_String* ) cff_index_get_name( CFF_Font font, FT_UInt element ) { … } /* get an entry from String INDEX */ FT_LOCAL_DEF( FT_String* ) cff_index_get_string( CFF_Font font, FT_UInt element ) { … } FT_LOCAL_DEF( FT_String* ) cff_index_get_sid_string( CFF_Font font, FT_UInt sid ) { … } /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** FD Select table support ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ static void CFF_Done_FD_Select( CFF_FDSelect fdselect, FT_Stream stream ) { … } static FT_Error CFF_Load_FD_Select( CFF_FDSelect fdselect, FT_UInt num_glyphs, FT_Stream stream, FT_ULong offset ) { … } FT_LOCAL_DEF( FT_Byte ) cff_fd_select_get( CFF_FDSelect fdselect, FT_UInt glyph_index ) { … } /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** CFF font support ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ static FT_Error cff_charset_compute_cids( CFF_Charset charset, FT_UInt num_glyphs, FT_Memory memory ) { … } FT_LOCAL_DEF( FT_UInt ) cff_charset_cid_to_gindex( CFF_Charset charset, FT_UInt cid ) { … } static void cff_charset_free_cids( CFF_Charset charset, FT_Memory memory ) { … } static void cff_charset_done( CFF_Charset charset, FT_Stream stream ) { … } static FT_Error cff_charset_load( CFF_Charset charset, FT_UInt num_glyphs, FT_Stream stream, FT_ULong base_offset, FT_ULong offset, FT_Bool invert ) { … } static void cff_vstore_done( CFF_VStoreRec* vstore, FT_Memory memory ) { … } /* convert 2.14 to Fixed */ #define FT_fdot14ToFixed( x ) … static FT_Error cff_vstore_load( CFF_VStoreRec* vstore, FT_Stream stream, FT_ULong base_offset, FT_ULong offset ) { … } /* Clear blend stack (after blend values are consumed). */ /* */ /* TODO: Should do this in cff_run_parse, but subFont */ /* ref is not available there. */ /* */ /* Allocation is not changed when stack is cleared. */ FT_LOCAL_DEF( void ) cff_blend_clear( CFF_SubFont subFont ) { … } /* Blend numOperands on the stack, */ /* store results into the first numBlends values, */ /* then pop remaining arguments. */ /* */ /* This is comparable to `cf2_doBlend' but */ /* the cffparse stack is different and can't be written. */ /* Blended values are written to a different buffer, */ /* using reserved operator 255. */ /* */ /* Blend calculation is done in 16.16 fixed-point. */ FT_LOCAL_DEF( FT_Error ) cff_blend_doBlend( CFF_SubFont subFont, CFF_Parser parser, FT_UInt numBlends ) { … } /* Compute a blend vector from variation store index and normalized */ /* vector based on pseudo-code in OpenType Font Variations Overview. */ /* */ /* Note: lenNDV == 0 produces a default blend vector, (1,0,0,...). */ FT_LOCAL_DEF( FT_Error ) cff_blend_build_vector( CFF_Blend blend, FT_UInt vsindex, FT_UInt lenNDV, FT_Fixed* NDV ) { … } /* `lenNDV' is zero for default vector; */ /* return TRUE if blend vector needs to be built. */ FT_LOCAL_DEF( FT_Bool ) cff_blend_check_vector( CFF_Blend blend, FT_UInt vsindex, FT_UInt lenNDV, FT_Fixed* NDV ) { … } #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT FT_LOCAL_DEF( FT_Error ) cff_get_var_blend( FT_Face face, /* CFF_Face */ FT_UInt *num_coords, FT_Fixed* *coords, FT_Fixed* *normalizedcoords, FT_MM_Var* *mm_var ) { … } FT_LOCAL_DEF( void ) cff_done_blend( FT_Face face ) /* CFF_Face */ { … } #endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */ static void cff_encoding_done( CFF_Encoding encoding ) { … } static FT_Error cff_encoding_load( CFF_Encoding encoding, CFF_Charset charset, FT_UInt num_glyphs, FT_Stream stream, FT_ULong base_offset, FT_ULong offset ) { … } /* Parse private dictionary; first call is always from `cff_face_init', */ /* so NDV has not been set for CFF2 variation. */ /* */ /* `cff_slot_load' must call this function each time NDV changes. */ FT_LOCAL_DEF( FT_Error ) cff_load_private_dict( CFF_Font font, CFF_SubFont subfont, FT_UInt lenNDV, FT_Fixed* NDV ) { … } /* There are 3 ways to call this function, distinguished by code. */ /* */ /* . CFF_CODE_TOPDICT for either a CFF Top DICT or a CFF Font DICT */ /* . CFF2_CODE_TOPDICT for CFF2 Top DICT */ /* . CFF2_CODE_FONTDICT for CFF2 Font DICT */ static FT_Error cff_subfont_load( CFF_SubFont subfont, CFF_Index idx, FT_UInt font_index, FT_Stream stream, FT_ULong base_offset, FT_UInt code, CFF_Font font, CFF_Face face ) { … } static void cff_subfont_done( FT_Memory memory, CFF_SubFont subfont ) { … } FT_LOCAL_DEF( FT_Error ) cff_font_load( FT_Library library, FT_Stream stream, FT_Int face_index, CFF_Font font, CFF_Face face, FT_Bool pure_cff, FT_Bool cff2 ) { … } FT_LOCAL_DEF( void ) cff_font_done( CFF_Font font ) { … } /* END */
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