| /***************************************************************************/ |
| /* */ |
| /* t1driver.c */ |
| /* */ |
| /* Type 1 driver interface (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 "t1driver.h" |
| #include "t1gload.h" |
| #include "t1load.h" |
| |
| #include "t1errors.h" |
| |
| #ifndef T1_CONFIG_OPTION_NO_AFM |
| #include "t1afm.h" |
| #endif |
| |
| #include FT_INTERNAL_DEBUG_H |
| #include FT_INTERNAL_STREAM_H |
| #include FT_INTERNAL_POSTSCRIPT_NAMES_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_t1driver |
| |
| |
| static FT_Error |
| t1_get_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 = (FT_UInt)( ft_strlen( gname ) ); |
| |
| |
| if (len >= buffer_max) |
| len = buffer_max - 1; |
| |
| FT_MEM_COPY( buffer, gname, len ); |
| ((FT_Byte*)buffer)[len] = 0; |
| } |
| |
| return T1_Err_Ok; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* t1_get_name_index */ |
| /* */ |
| /* <Description> */ |
| /* Uses the Type 1 font's `glyph_names' table to find 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 |
| t1_get_name_index( T1_Face face, |
| FT_String* glyph_name ) |
| { |
| FT_Int i; |
| FT_String* gname; |
| |
| |
| for ( i = 0; i < face->type1.num_glyphs; i++ ) |
| { |
| gname = face->type1.glyph_names[i]; |
| |
| if ( !ft_strcmp( glyph_name, gname ) ) |
| return (FT_UInt)i; |
| } |
| |
| return 0; |
| } |
| |
| |
| static const char* |
| t1_get_ps_name( T1_Face face ) |
| { |
| return (const char*) face->type1.font_name; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <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> */ |
| /* t1_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* t1_interface ) |
| { |
| FT_UNUSED( driver ); |
| FT_UNUSED( t1_interface ); |
| |
| if ( ft_strcmp( (const char*)t1_interface, "glyph_name" ) == 0 ) |
| return (FT_Module_Interface)t1_get_glyph_name; |
| |
| if ( ft_strcmp( (const char*)t1_interface, "name_index" ) == 0 ) |
| return (FT_Module_Interface)t1_get_name_index; |
| |
| if ( ft_strcmp( (const char*)t1_interface, "postscript_name" ) == 0 ) |
| return (FT_Module_Interface)t1_get_ps_name; |
| |
| #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT |
| if ( ft_strcmp( (const char*)t1_interface, "get_mm" ) == 0 ) |
| return (FT_Module_Interface)T1_Get_Multi_Master; |
| |
| if ( ft_strcmp( (const char*)t1_interface, "set_mm_design") == 0 ) |
| return (FT_Module_Interface)T1_Set_MM_Design; |
| |
| if ( ft_strcmp( (const char*)t1_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 */ |
| |
| |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FT_Driver_ClassRec t1_driver_class = |
| { |
| { |
| ft_module_font_driver | |
| ft_module_driver_scalable | |
| ft_module_driver_has_hinter, |
| |
| sizeof( FT_DriverRec ), |
| |
| "type1", |
| 0x10000L, |
| 0x20000L, |
| |
| 0, /* format interface */ |
| |
| (FT_Module_Constructor)T1_Driver_Init, |
| (FT_Module_Destructor) T1_Driver_Done, |
| (FT_Module_Requester) Get_Interface, |
| }, |
| |
| sizeof( T1_FaceRec ), |
| sizeof( T1_SizeRec ), |
| sizeof( T1_GlyphSlotRec ), |
| |
| (FT_Face_InitFunc) T1_Face_Init, |
| (FT_Face_DoneFunc) T1_Face_Done, |
| (FT_Size_InitFunc) T1_Size_Init, |
| (FT_Size_DoneFunc) T1_Size_Done, |
| (FT_Slot_InitFunc) T1_GlyphSlot_Init, |
| (FT_Slot_DoneFunc) T1_GlyphSlot_Done, |
| |
| (FT_Size_ResetPointsFunc) T1_Size_Reset, |
| (FT_Size_ResetPixelsFunc) T1_Size_Reset, |
| (FT_Slot_LoadFunc) T1_Load_Glyph, |
| |
| #ifdef T1_CONFIG_OPTION_NO_AFM |
| (FT_Face_GetKerningFunc) 0, |
| (FT_Face_AttachFunc) 0, |
| #else |
| (FT_Face_GetKerningFunc) Get_Kerning, |
| (FT_Face_AttachFunc) T1_Read_AFM, |
| #endif |
| (FT_Face_GetAdvancesFunc) 0 |
| }; |
| |
| |
| /* END */ |
