freetype2/src/type42/t42drivr.c

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/****************************************************************************
*
* t42drivr.c
*
* High-level Type 42 driver interface (body).
*
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* Copyright (C) 2002-2021 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 <freetype/internal/ftdebug.h>
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#include <freetype/internal/services/svfntfmt.h>
#include <freetype/internal/services/svgldict.h>
#include <freetype/internal/services/svpostnm.h>
#include <freetype/internal/services/svpsinfo.h>
#undef FT_COMPONENT
#define FT_COMPONENT t42
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/*
*
* GLYPH DICT SERVICE
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*
*/
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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;
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}
static FT_UInt
t42_get_name_index( T42_Face face,
const FT_String* glyph_name )
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{
FT_Int i;
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for ( i = 0; i < face->type1.num_glyphs; i++ )
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{
FT_String* gname = face->type1.glyph_names[i];
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if ( glyph_name[0] == gname[0] && !ft_strcmp( glyph_name, gname ) )
return (FT_UInt)ft_strtol( (const char *)face->type1.charstrings[i],
NULL, 10 );
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}
return 0;
}
static const FT_Service_GlyphDictRec t42_service_glyph_dict =
{
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(FT_GlyphDict_GetNameFunc) t42_get_glyph_name, /* get_name */
(FT_GlyphDict_NameIndexFunc)t42_get_name_index /* name_index */
};
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/*
*
* POSTSCRIPT NAME SERVICE
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*
*/
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 =
{
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(FT_PsName_GetFunc)t42_get_ps_font_name /* get_ps_font_name */
};
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/*
*
* POSTSCRIPT INFO SERVICE
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*
*/
static FT_Error
t42_ps_get_font_info( FT_Face face,
PS_FontInfoRec* afont_info )
{
*afont_info = ((T42_Face)face)->type1.font_info;
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return FT_Err_Ok;
}
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static FT_Error
t42_ps_get_font_extra( FT_Face face,
PS_FontExtraRec* afont_extra )
{
*afont_extra = ((T42_Face)face)->type1.font_extra;
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return FT_Err_Ok;
}
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static FT_Int
t42_ps_has_glyph_names( FT_Face face )
{
FT_UNUSED( face );
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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;
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return FT_Err_Ok;
}
static const FT_Service_PsInfoRec t42_service_ps_info =
{
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(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 */
};
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/*
*
* SERVICE LIST
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*
*/
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 }
};
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FT_CALLBACK_DEF( FT_Module_Interface )
T42_Get_Interface( FT_Module module,
const FT_String* t42_interface )
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{
FT_UNUSED( module );
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return ft_service_list_lookup( t42_services, t42_interface );
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}
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,
* src/type42/t42drivr.c: s/T42_ENCODING_TYPE_/T1_ENCODING_TYPE_/. (parse_font_matrix): Remove unnecessary code. (parse_sfnts): Initialize some variables. (t42_driver_class) [TT_CONFIG_OPTION_BYTECODE_INTERPRETER]: Use ft_module_driver_has_hinter conditionally. Moved some type 42 specific structure definitions to... * include/freetype/internal/t42types.h: New file. * include/freetype/internal/internal.h (FT_INTERNAL_T42_TYPES_H): New macro. * include/freetype/cache/ftcsbits.h (FTC_SBit): Added a new field `num_grays' for specifying the number of used gray levels. * src/cache/ftcsbits.c (ftc_sbit_node_load): Initialize it. Adding a driver for BDF fonts written by Francesco Zappa Nardelli <Francesco.Zappa.Nardelli@ens.fr>. Heavily modified by me to better adapt it to FreeType, removing unneeded stuff. Additionally, it now supports Mark Leisher's BDF extension for anti-aliased bitmap glyphs with 2 and 4 bpp. * src/bdf/*: New driver. * include/freetype/internal/bdftypes.h: New file. * include/freetype/internal/fttrace.h: Added BDF driver components. * include/freetype/fterrdef.h: Added error codes for BDF driver. * include/freetype/config/ftmodule.h, src/Jamfile: Updated. * include/freetype/internal/internal.h (FT_INTERNAL_BDF_TYPES_H): New macro. * include/freetype/config/ftstdlib.h (ft_sprintf): New alias for sprintf. * include/freetype/internal/fttrace.h: Added Type 42 driver component. * src/type42/t42drivr.c: Use it. * include/freetype/internal/internal.h (FT_INTERNAL_PCF_TYPES_H): New macro.
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#else
0,
#endif
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sizeof ( T42_DriverRec ),
"type42",
0x10000L,
0x20000L,
NULL, /* module-specific interface */
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T42_Driver_Init, /* FT_Module_Constructor module_init */
T42_Driver_Done, /* FT_Module_Destructor module_done */
T42_Get_Interface, /* FT_Module_Requester get_interface */
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},
sizeof ( T42_FaceRec ),
sizeof ( T42_SizeRec ),
sizeof ( T42_GlyphSlotRec ),
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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 */
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T42_GlyphSlot_Load, /* FT_Slot_LoadFunc load_glyph */
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NULL, /* FT_Face_GetKerningFunc get_kerning */
NULL, /* FT_Face_AttachFunc attach_file */
NULL, /* FT_Face_GetAdvancesFunc get_advances */
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T42_Size_Request, /* FT_Size_RequestFunc request_size */
T42_Size_Select /* FT_Size_SelectFunc select_size */
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};
/* END */