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- /***************************************************************************/
- /* */
- /* 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 */
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