ref: a8a54c30603ddedef5a2a96615e9fd66504356bf
dir: /src/type42/t42drivr.c/
/***************************************************************************/
/* */
/* t42drivr.c */
/* */
/* High-level Type 42 driver interface (body). */
/* */
/* Copyright 2002-2015 by */
/* Roberto Alameda. */
/* */
/* 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. */
/* */
/***************************************************************************/
/*************************************************************************/
/* */
/* This driver implements Type42 fonts as described in the */
/* Technical Note #5012 from Adobe, with these limitations: */
/* */
/* 1) CID Fonts are not currently supported. */
/* 2) Incremental fonts making use of the GlyphDirectory keyword */
/* will be loaded, but the rendering will be using the TrueType */
/* tables. */
/* 3) As for Type1 fonts, CDevProc is not supported. */
/* 4) The Metrics dictionary is not supported. */
/* 5) AFM metrics are not supported. */
/* */
/* In other words, this driver supports Type42 fonts derived from */
/* TrueType fonts in a non-CID manner, as done by usual conversion */
/* programs. */
/* */
/*************************************************************************/
#include "t42drivr.h"
#include "t42objs.h"
#include "t42error.h"
#include FT_INTERNAL_DEBUG_H
#include FT_SERVICE_FONT_FORMAT_H
#include FT_SERVICE_GLYPH_DICT_H
#include FT_SERVICE_POSTSCRIPT_NAME_H
#include FT_SERVICE_POSTSCRIPT_INFO_H
#undef FT_COMPONENT
#define FT_COMPONENT trace_t42
/*
*
* GLYPH DICT SERVICE
*
*/
static FT_Error
t42_get_glyph_name( T42_Face face,
FT_UInt glyph_index,
FT_Pointer buffer,
FT_UInt buffer_max )
{
FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max );
return FT_Err_Ok;
}
static FT_UInt
t42_get_name_index( T42_Face face,
FT_String* glyph_name )
{
FT_Int i;
for ( i = 0; i < face->type1.num_glyphs; i++ )
{
FT_String* gname = face->type1.glyph_names[i];
if ( glyph_name[0] == gname[0] && !ft_strcmp( glyph_name, gname ) )
return (FT_UInt)ft_atol( (const char *)face->type1.charstrings[i] );
}
return 0;
}
static const FT_Service_GlyphDictRec t42_service_glyph_dict =
{
(FT_GlyphDict_GetNameFunc) t42_get_glyph_name, /* get_name */
(FT_GlyphDict_NameIndexFunc)t42_get_name_index /* name_index */
};
/*
*
* POSTSCRIPT NAME SERVICE
*
*/
static const char*
t42_get_ps_font_name( T42_Face face )
{
return (const char*)face->type1.font_name;
}
static const FT_Service_PsFontNameRec t42_service_ps_font_name =
{
(FT_PsName_GetFunc)t42_get_ps_font_name /* get_ps_font_name */
};
/*
*
* POSTSCRIPT INFO SERVICE
*
*/
static FT_Error
t42_ps_get_font_info( FT_Face face,
PS_FontInfoRec* afont_info )
{
*afont_info = ((T42_Face)face)->type1.font_info;
return FT_Err_Ok;
}
static FT_Error
t42_ps_get_font_extra( FT_Face face,
PS_FontExtraRec* afont_extra )
{
*afont_extra = ((T42_Face)face)->type1.font_extra;
return FT_Err_Ok;
}
static FT_Int
t42_ps_has_glyph_names( FT_Face face )
{
FT_UNUSED( face );
return 1;
}
static FT_Error
t42_ps_get_font_private( FT_Face face,
PS_PrivateRec* afont_private )
{
*afont_private = ((T42_Face)face)->type1.private_dict;
return FT_Err_Ok;
}
static const FT_Service_PsInfoRec t42_service_ps_info =
{
(PS_GetFontInfoFunc) t42_ps_get_font_info, /* ps_get_font_info */
(PS_GetFontExtraFunc) t42_ps_get_font_extra, /* ps_get_font_extra */
(PS_HasGlyphNamesFunc) t42_ps_has_glyph_names, /* ps_has_glyph_names */
(PS_GetFontPrivateFunc)t42_ps_get_font_private, /* ps_get_font_private */
/* not implemented */
(PS_GetFontValueFunc) NULL /* ps_get_font_value */
};
/*
*
* SERVICE LIST
*
*/
static const FT_ServiceDescRec t42_services[] =
{
{ FT_SERVICE_ID_GLYPH_DICT, &t42_service_glyph_dict },
{ FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t42_service_ps_font_name },
{ FT_SERVICE_ID_POSTSCRIPT_INFO, &t42_service_ps_info },
{ FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_42 },
{ NULL, NULL }
};
FT_CALLBACK_DEF( FT_Module_Interface )
T42_Get_Interface( FT_Module module,
const FT_String* t42_interface )
{
FT_UNUSED( module );
return ft_service_list_lookup( t42_services, t42_interface );
}
const FT_Driver_ClassRec t42_driver_class =
{
{
FT_MODULE_FONT_DRIVER |
FT_MODULE_DRIVER_SCALABLE |
#ifdef TT_USE_BYTECODE_INTERPRETER
FT_MODULE_DRIVER_HAS_HINTER,
#else
0,
#endif
sizeof ( T42_DriverRec ),
"type42",
0x10000L,
0x20000L,
0, /* module-specific interface */
T42_Driver_Init, /* FT_Module_Constructor module_init */
T42_Driver_Done, /* FT_Module_Destructor module_done */
T42_Get_Interface, /* FT_Module_Requester get_interface */
},
sizeof ( T42_FaceRec ),
sizeof ( T42_SizeRec ),
sizeof ( T42_GlyphSlotRec ),
T42_Face_Init, /* FT_Face_InitFunc init_face */
T42_Face_Done, /* FT_Face_DoneFunc done_face */
T42_Size_Init, /* FT_Size_InitFunc init_size */
T42_Size_Done, /* FT_Size_DoneFunc done_size */
T42_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */
T42_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */
T42_GlyphSlot_Load, /* FT_Slot_LoadFunc load_glyph */
0, /* FT_Face_GetKerningFunc get_kerning */
0, /* FT_Face_AttachFunc attach_file */
0, /* FT_Face_GetAdvancesFunc get_advances */
T42_Size_Request, /* FT_Size_RequestFunc request_size */
T42_Size_Select /* FT_Size_SelectFunc select_size */
};
/* END */