ref: 81473305d85d49658803680777a9f9528596f4a0
dir: /libfreetype/t1driver.c/
/***************************************************************************/
/* */
/* 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 */