| /***************************************************************************/ |
| /* */ |
| /* t1driver.c */ |
| /* */ |
| /* Type 1 driver interface (body). */ |
| /* */ |
| /* Copyright 1996-2000 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. */ |
| /* */ |
| /***************************************************************************/ |
| |
| |
| #ifdef FT_FLAT_COMPILE |
| |
| #include "t1driver.h" |
| #include "t1gload.h" |
| #include "t1load.h" |
| #include "t1afm.h" |
| |
| #else |
| |
| #include <type1/t1driver.h> |
| #include <type1/t1gload.h> |
| #include <type1/t1load.h> |
| #include <type1/t1afm.h> |
| |
| #endif |
| |
| |
| #include <freetype/internal/ftdebug.h> |
| #include <freetype/internal/ftstream.h> |
| #include <freetype/internal/psnames.h> |
| |
| #include <string.h> /* for strcmp() */ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* 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_t1driver |
| |
| |
| static |
| FT_Error get_t1_glyph_name( T1_Face face, |
| FT_UInt glyph_index, |
| FT_Pointer buffer, |
| FT_UInt buffer_max ) |
| { |
| FT_String* gname; |
| |
| |
| gname = face->type1.glyph_names[glyph_index]; |
| |
| if ( buffer_max > 0 ) |
| { |
| FT_UInt len = strlen( gname ); |
| |
| |
| if (len >= buffer_max) |
| len = buffer_max - 1; |
| |
| MEM_Copy( buffer, gname, len ); |
| ((FT_Byte*)buffer)[len] = 0; |
| } |
| |
| return T1_Err_Ok; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* Get_Interface */ |
| /* */ |
| /* <Description> */ |
| /* Each driver can provide one or more extensions to the base */ |
| /* FreeType API. These can be used to access format specific */ |
| /* features (e.g., all TrueType/OpenType resources share a common */ |
| /* file structure and common tables which can be accessed through the */ |
| /* `sfnt' interface), or more simply generic ones (e.g., the */ |
| /* `postscript names' interface which can be used to retrieve the */ |
| /* PostScript name of a given glyph index). */ |
| /* */ |
| /* <InOut> */ |
| /* driver :: A handle to a driver object. */ |
| /* */ |
| /* <Input> */ |
| /* interface :: A string designing the interface. Examples are */ |
| /* `sfnt', `post_names', `charmaps', etc. */ |
| /* */ |
| /* <Return> */ |
| /* A typeless pointer to the extension's interface (normally a table */ |
| /* of function pointers). Returns NULL if the requested extension */ |
| /* isn't available (i.e., wasn't compiled in the driver at build */ |
| /* time). */ |
| /* */ |
| static |
| FT_Module_Interface Get_Interface( FT_Driver driver, |
| const FT_String* interface ) |
| { |
| FT_UNUSED( driver ); |
| FT_UNUSED( interface ); |
| |
| if ( strcmp( (const char*)interface, "glyph_name" ) == 0 ) |
| return (FT_Module_Interface)get_t1_glyph_name; |
| |
| #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT |
| if ( strcmp( (const char*)interface, "get_mm" ) == 0 ) |
| return (FT_Module_Interface)T1_Get_Multi_Master; |
| |
| if ( strcmp( (const char*)interface, "set_mm_design") == 0 ) |
| return (FT_Module_Interface)T1_Set_MM_Design; |
| |
| if ( strcmp( (const char*)interface, "set_mm_blend") == 0 ) |
| return (FT_Module_Interface)T1_Set_MM_Blend; |
| #endif |
| return 0; |
| } |
| |
| |
| #ifndef T1_CONFIG_OPTION_NO_AFM |
| |
| /*************************************************************************/ |
| /* */ |
| /* <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( T1_Face face, |
| FT_UInt left_glyph, |
| FT_UInt right_glyph, |
| FT_Vector* kerning ) |
| { |
| T1_AFM* afm; |
| |
| |
| kerning->x = 0; |
| kerning->y = 0; |
| |
| afm = (T1_AFM*)face->afm_data; |
| if ( afm ) |
| T1_Get_Kerning( afm, left_glyph, right_glyph, kerning ); |
| |
| return T1_Err_Ok; |
| } |
| |
| |
| #endif /* T1_CONFIG_OPTION_NO_AFM */ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* 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 Get_Char_Index( FT_CharMap charmap, |
| FT_Long charcode ) |
| { |
| T1_Face face; |
| FT_UInt result = 0; |
| PSNames_Interface* psnames; |
| |
| |
| face = (T1_Face)charmap->face; |
| psnames = (PSNames_Interface*)face->psnames; |
| if ( psnames ) |
| switch ( charmap->encoding ) |
| { |
| /*******************************************************************/ |
| /* */ |
| /* Unicode encoding support */ |
| /* */ |
| case ft_encoding_unicode: |
| /* use the `PSNames' module to synthetize the Unicode charmap */ |
| result = psnames->lookup_unicode( &face->unicode_map, |
| (FT_ULong)charcode ); |
| |
| /* the function returns 0xFFFF if the Unicode charcode has */ |
| /* no corresponding glyph */ |
| if ( result == 0xFFFF ) |
| result = 0; |
| goto Exit; |
| |
| /*******************************************************************/ |
| /* */ |
| /* Custom Type 1 encoding */ |
| /* */ |
| case ft_encoding_adobe_custom: |
| { |
| T1_Encoding* encoding = &face->type1.encoding; |
| |
| |
| if ( charcode >= encoding->code_first && |
| charcode <= encoding->code_last ) |
| result = encoding->char_index[charcode]; |
| goto Exit; |
| } |
| |
| /*******************************************************************/ |
| /* */ |
| /* Adobe Standard & Expert encoding support */ |
| /* */ |
| default: |
| if ( charcode < 256 ) |
| { |
| FT_UInt code; |
| FT_Int n; |
| const char* glyph_name; |
| |
| |
| code = psnames->adobe_std_encoding[charcode]; |
| if ( charmap->encoding == ft_encoding_adobe_expert ) |
| code = psnames->adobe_expert_encoding[charcode]; |
| |
| glyph_name = psnames->adobe_std_strings( code ); |
| if ( !glyph_name ) |
| break; |
| |
| for ( n = 0; n < face->type1.num_glyphs; n++ ) |
| { |
| const char* gname = face->type1.glyph_names[n]; |
| |
| |
| if ( gname && gname[0] == glyph_name[0] && |
| strcmp( gname, glyph_name ) == 0 ) |
| { |
| result = n; |
| break; |
| } |
| } |
| } |
| } |
| Exit: |
| return result; |
| } |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FT_Driver_Class t1_driver_class = |
| { |
| { |
| ft_module_font_driver | ft_module_driver_scalable, |
| sizeof( FT_DriverRec ), |
| |
| "type1", |
| 0x10000L, |
| 0x20000L, |
| |
| 0, /* format interface */ |
| |
| (FT_Module_Constructor)T1_Init_Driver, |
| (FT_Module_Destructor) T1_Done_Driver, |
| (FT_Module_Requester) Get_Interface, |
| }, |
| |
| sizeof( T1_FaceRec ), |
| sizeof( T1_SizeRec ), |
| sizeof( T1_GlyphSlotRec ), |
| |
| (FTDriver_initFace) T1_Init_Face, |
| (FTDriver_doneFace) T1_Done_Face, |
| (FTDriver_initSize) 0, |
| (FTDriver_doneSize) 0, |
| (FTDriver_initGlyphSlot)0, |
| (FTDriver_doneGlyphSlot)0, |
| |
| (FTDriver_setCharSizes) 0, |
| (FTDriver_setPixelSizes)0, |
| (FTDriver_loadGlyph) T1_Load_Glyph, |
| (FTDriver_getCharIndex) Get_Char_Index, |
| |
| #ifdef T1_CONFIG_OPTION_NO_AFM |
| (FTDriver_getKerning) 0, |
| (FTDriver_attachFile) 0, |
| #else |
| (FTDriver_getKerning) Get_Kerning, |
| (FTDriver_attachFile) T1_Read_AFM, |
| #endif |
| (FTDriver_getAdvances) 0 |
| }; |
| |
| |
| #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 &t1_driver_class; |
| } |
| |
| |
| #endif /* FT_CONFIG_OPTION_DYNAMIC_DRIVERS */ |
| |
| |
| /* END */ |
