kc3-lang/freetype/src/cff/cffdrivr.c
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Hash : d15bc0d1
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Date : 2002-04-12T09:31:48
* README.UNX: updated the Unix-specific quick-compilation guide to warn about the GNU Make requirement at compile time.. * include/freetype/config/ftstdlib.h, include/freetype/config/ftconfig.h, include/freetype/config/ftheader.h, include/freetype/internal/ftmemory.h, include/freetype/internal/ftobjs.h, src/autohint/ahoptim.c, src/base/ftdbgmem.c, src/base/ftdebug.c, src/base/ftmac.c, src/base/ftobjs.c, src/base/ftsystem.c, src/cache/ftcimage.c, src/cache/ftcsbits.c, src/cff/cffdriver.c, src/cff/cffload.c, src/cff/cffobjs.c, src/cid/cidload.c, src/cid/cidparse.c, src/cid/cidriver.c, src/pcf/pcfdriver.c, src/pcf/pcfread.c, src/psaux/t1cmap.c, src/psaux/t1decode.c, src/pshinter/pshalgo1.c, src/pshinter/pshalgo2.c, src/pshinter/pshrec.c, src/psnames/psmodule.c, src/raster/ftraster.c, src/sfnt/sfdriver.c, src/sfnt/ttload.c, src/sfnt/ttpost.c, src/smooth/ftgrays.c, src/type1/t1afm.c, src/type1/t1driver.c, src/type1/t1gload.c, src/type1/t1load.c, src/type1/t1objs.c, src/type1/t1parse.c: added the new configuration file "ftstdlib.h" used to define aliases for all ISO C library functions used by the engine (e.g. strlen, qsort, setjmp, etc...) this eases the porting of FreeType 2 to exotic environments like XFree86 modules/extensions.. also removed many #include <string.h>, #include <stdlib.h>, etc... from the engine's sources where they're not needed..
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src/cff/cffdrivr.c
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/***************************************************************************/ /* */ /* cffdrivr.c */ /* */ /* OpenType font driver implementation (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_FREETYPE_H #include FT_INTERNAL_DEBUG_H #include FT_INTERNAL_STREAM_H #include FT_INTERNAL_SFNT_H #include FT_TRUETYPE_IDS_H #include FT_INTERNAL_POSTSCRIPT_NAMES_H #include "cffdrivr.h" #include "cffgload.h" #include "cffload.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_cffdriver /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** F A C E S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ #undef PAIR_TAG #define PAIR_TAG( left, right ) ( ( (FT_ULong)left << 16 ) | \ (FT_ULong)right ) /*************************************************************************/ /* */ /* <Function> */ /* Get_Kerning */ /* */ /* <Description> */ /* A driver method used to return the kerning vector between two */ /* glyphs of the same face. */ /* */ /* <Input> */ /* face :: A handle to the source face object. */ /* */ /* left_glyph :: The index of the left glyph in the kern pair. */ /* */ /* right_glyph :: The index of the right glyph in the kern pair. */ /* */ /* <Output> */ /* kerning :: The kerning vector. This is in font units for */ /* scalable formats, and in pixels for fixed-sizes */ /* formats. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ /* <Note> */ /* Only horizontal layouts (left-to-right & right-to-left) are */ /* supported by this function. Other layouts, or more sophisticated */ /* kernings, are out of scope of this method (the basic driver */ /* interface is meant to be simple). */ /* */ /* They can be implemented by format-specific interfaces. */ /* */ static FT_Error Get_Kerning( TT_Face face, FT_UInt left_glyph, FT_UInt right_glyph, FT_Vector* kerning ) { TT_Kern0_Pair pair; if ( !face ) return CFF_Err_Invalid_Face_Handle; kerning->x = 0; kerning->y = 0; if ( face->kern_pairs ) { /* there are some kerning pairs in this font file! */ FT_ULong search_tag = PAIR_TAG( left_glyph, right_glyph ); FT_Long left, right; left = 0; right = face->num_kern_pairs - 1; while ( left <= right ) { FT_Int middle = left + ( ( right - left ) >> 1 ); FT_ULong cur_pair; pair = face->kern_pairs + middle; cur_pair = PAIR_TAG( pair->left, pair->right ); if ( cur_pair == search_tag ) goto Found; if ( cur_pair < search_tag ) left = middle + 1; else right = middle - 1; } } Exit: return CFF_Err_Ok; Found: kerning->x = pair->value; goto Exit; } #undef PAIR_TAG /*************************************************************************/ /* */ /* <Function> */ /* Load_Glyph */ /* */ /* <Description> */ /* A driver method used to load a glyph within a given glyph slot. */ /* */ /* <Input> */ /* slot :: A handle to the target slot object where the glyph */ /* will be loaded. */ /* */ /* size :: A handle to the source face size at which the glyph */ /* must be scaled, loaded, etc. */ /* */ /* glyph_index :: The index of the glyph in the font file. */ /* */ /* load_flags :: A flag indicating what to load for this glyph. The */ /* FTLOAD_??? constants can be used to control the */ /* glyph loading process (e.g., whether the outline */ /* should be scaled, whether to load bitmaps or not, */ /* whether to hint the outline, etc). */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ static FT_Error Load_Glyph( CFF_GlyphSlot slot, CFF_Size size, FT_UShort glyph_index, FT_UInt load_flags ) { FT_Error error; if ( !slot ) return CFF_Err_Invalid_Slot_Handle; /* check whether we want a scaled outline or bitmap */ if ( !size ) load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; if ( load_flags & FT_LOAD_NO_SCALE ) size = NULL; /* reset the size object if necessary */ if ( size ) { /* these two object must have the same parent */ if ( size->face != slot->root.face ) return CFF_Err_Invalid_Face_Handle; } /* now load the glyph outline if necessary */ error = CFF_Load_Glyph( slot, size, glyph_index, load_flags ); /* force drop-out mode to 2 - irrelevant now */ /* slot->outline.dropout_mode = 2; */ return error; } /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** C H A R A C T E R M A P P I N G S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ static FT_Error cff_get_glyph_name( CFF_Face face, FT_UInt glyph_index, FT_Pointer buffer, FT_UInt buffer_max ) { CFF_Font font = (CFF_Font)face->extra.data; FT_Memory memory = FT_FACE_MEMORY( face ); FT_String* gname; FT_UShort sid; PSNames_Service psnames; FT_Error error; psnames = (PSNames_Service)FT_Get_Module_Interface( face->root.driver->root.library, "psnames" ); if ( !psnames ) { FT_ERROR(( "cff_get_glyph_name:" )); FT_ERROR(( " cannot open CFF & CEF fonts\n" )); FT_ERROR(( " " )); FT_ERROR(( " without the `PSNames' module\n" )); error = CFF_Err_Unknown_File_Format; goto Exit; } /* first, locate the sid in the charset table */ sid = font->charset.sids[glyph_index]; /* now, lookup the name itself */ gname = CFF_Get_String( &font->string_index, sid, psnames ); if ( buffer_max > 0 ) { FT_UInt len = ft_strlen( gname ); if ( len >= buffer_max ) len = buffer_max - 1; FT_MEM_COPY( buffer, gname, len ); ((FT_Byte*)buffer)[len] = 0; } FT_FREE ( gname ); error = CFF_Err_Ok; Exit: return error; } /*************************************************************************/ /* */ /* <Function> */ /* cff_get_char_index */ /* */ /* <Description> */ /* Uses a charmap to return a given character code's glyph index. */ /* */ /* <Input> */ /* charmap :: A handle to the source charmap object. */ /* charcode :: The character code. */ /* */ /* <Return> */ /* Glyph index. 0 means `undefined character code'. */ /* */ static FT_UInt cff_get_char_index( TT_CharMap charmap, FT_Long charcode ) { FT_Error error; CFF_Face face; TT_CMapTable cmap; cmap = &charmap->cmap; face = (CFF_Face)charmap->root.face; /* Load table if needed */ if ( !cmap->loaded ) { SFNT_Service sfnt = (SFNT_Service)face->sfnt; error = sfnt->load_charmap( face, cmap, face->root.stream ); if ( error ) return 0; cmap->loaded = TRUE; } return ( cmap->get_index ? cmap->get_index( cmap, charcode ) : 0 ); } /*************************************************************************/ /* */ /* <Function> */ /* cff_get_next_char */ /* */ /* <Description> */ /* Uses a charmap to return the next encoded charcode. */ /* */ /* <Input> */ /* charmap :: A handle to the source charmap object. */ /* charcode :: The character code. */ /* */ /* <Return> */ /* Char code. 0 means `no encoded chars above the given one'. */ /* */ static FT_Long cff_get_next_char( TT_CharMap charmap, FT_Long charcode ) { FT_Error error; CFF_Face face; TT_CMapTable cmap; cmap = &charmap->cmap; face = (CFF_Face)charmap->root.face; /* Load table if needed */ if ( !cmap->loaded ) { SFNT_Service sfnt = (SFNT_Service)face->sfnt; error = sfnt->load_charmap( face, cmap, face->root.stream ); if ( error ) return 0; cmap->loaded = TRUE; } return ( cmap->get_next_char ? cmap->get_next_char( cmap, charcode ) : 0 ); } /*************************************************************************/ /* */ /* <Function> */ /* cff_get_name_index */ /* */ /* <Description> */ /* Uses the psnames module and the CFF font's charset to to return a */ /* a given glyph name's glyph index. */ /* */ /* <Input> */ /* face :: A handle to the source face object. */ /* */ /* glyph_name :: The glyph name. */ /* */ /* <Return> */ /* Glyph index. 0 means `undefined character code'. */ /* */ static FT_UInt cff_get_name_index( CFF_Face face, FT_String* glyph_name ) { CFF_Font cff; CFF_Charset charset; PSNames_Service psnames; FT_Memory memory = FT_FACE_MEMORY( face ); FT_String* name; FT_UShort sid; FT_UInt i; FT_Int result; cff = (CFF_FontRec *)face->extra.data; charset = &cff->charset; psnames = (PSNames_Service)FT_Get_Module_Interface( face->root.driver->root.library, "psnames" ); for ( i = 0; i < cff->num_glyphs; i++ ) { sid = charset->sids[i]; if ( sid > 390 ) name = CFF_Get_Name( &cff->string_index, sid - 391 ); else name = (FT_String *)psnames->adobe_std_strings( sid ); result = ft_strcmp( glyph_name, name ); if ( sid > 390 ) FT_FREE( name ); if ( !result ) return i; } return 0; } /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** D R I V E R I N T E R F A C E ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ static FT_Module_Interface cff_get_interface( CFF_Driver driver, const char* interface ) { FT_Module sfnt; #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES if ( ft_strcmp( (const char*)interface, "glyph_name" ) == 0 ) return (FT_Module_Interface)cff_get_glyph_name; if ( ft_strcmp( (const char*)interface, "name_index" ) == 0 ) return (FT_Module_Interface)cff_get_name_index; #endif /* we simply pass our request to the `sfnt' module */ sfnt = FT_Get_Module( driver->root.root.library, "sfnt" ); return sfnt ? sfnt->clazz->get_interface( sfnt, interface ) : 0; } /* The FT_DriverInterface structure is defined in ftdriver.h. */ FT_CALLBACK_TABLE_DEF const FT_Driver_ClassRec cff_driver_class = { /* begin with the FT_Module_Class fields */ { ft_module_font_driver | ft_module_driver_scalable | ft_module_driver_has_hinter, sizeof( CFF_DriverRec ), "cff", 0x10000L, 0x20000L, 0, /* module-specific interface */ (FT_Module_Constructor)CFF_Driver_Init, (FT_Module_Destructor) CFF_Driver_Done, (FT_Module_Requester) cff_get_interface, }, /* now the specific driver fields */ sizeof( TT_FaceRec ), sizeof( FT_SizeRec ), sizeof( CFF_GlyphSlotRec ), (FT_Face_InitFunc) CFF_Face_Init, (FT_Face_DoneFunc) CFF_Face_Done, (FT_Size_InitFunc) CFF_Size_Init, (FT_Size_DoneFunc) CFF_Size_Done, (FT_Slot_InitFunc) CFF_GlyphSlot_Init, (FT_Slot_DoneFunc) CFF_GlyphSlot_Done, (FT_Size_ResetPointsFunc) CFF_Size_Reset, (FT_Size_ResetPixelsFunc) CFF_Size_Reset, (FT_Slot_LoadFunc) Load_Glyph, (FT_CharMap_CharIndexFunc)cff_get_char_index, (FT_Face_GetKerningFunc) Get_Kerning, (FT_Face_AttachFunc) 0, (FT_Face_GetAdvancesFunc) 0, (FT_CharMap_CharNextFunc) cff_get_next_char }; #ifdef FT_CONFIG_OPTION_DYNAMIC_DRIVERS /*************************************************************************/ /* */ /* <Function> */ /* getDriverClass */ /* */ /* <Description> */ /* This function is used when compiling the TrueType driver as a */ /* shared library (`.DLL' or `.so'). It will be used by the */ /* high-level library of FreeType to retrieve the address of the */ /* driver's generic interface. */ /* */ /* It shouldn't be implemented in a static build, as each driver must */ /* have the same function as an exported entry point. */ /* */ /* <Return> */ /* The address of the TrueType's driver generic interface. The */ /* format-specific interface can then be retrieved through the method */ /* interface->get_format_interface. */ /* */ FT_EXPORT_DEF( const FT_Driver_Class ) getDriverClass( void ) { return &cff_driver_class; } #endif /* CONFIG_OPTION_DYNAMIC_DRIVERS */ /* END */