ff0ef828c9
Ensure that all driver functions use the signature of the service or driver. This avoids pointer mismatches, which are technically undefined behaviour. Recent compilers are more picky in catching them as part of Control Flow Integrity tests.
249 lines
6.4 KiB
C
249 lines
6.4 KiB
C
/****************************************************************************
|
|
*
|
|
* t42drivr.c
|
|
*
|
|
* High-level Type 42 driver interface (body).
|
|
*
|
|
* Copyright (C) 2002-2023 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>
|
|
|
|
#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
|
|
|
|
|
|
/*
|
|
*
|
|
* GLYPH DICT SERVICE
|
|
*
|
|
*/
|
|
|
|
FT_CALLBACK_DEF( FT_Error )
|
|
t42_get_glyph_name( FT_Face face, /* T42_Face */
|
|
FT_UInt glyph_index,
|
|
FT_Pointer buffer,
|
|
FT_UInt buffer_max )
|
|
{
|
|
T42_Face t42face = (T42_Face)face;
|
|
|
|
|
|
FT_STRCPYN( buffer,
|
|
t42face->type1.glyph_names[glyph_index],
|
|
buffer_max );
|
|
|
|
return FT_Err_Ok;
|
|
}
|
|
|
|
|
|
FT_CALLBACK_DEF( FT_UInt )
|
|
t42_get_name_index( FT_Face face, /* T42_Face */
|
|
const FT_String* glyph_name )
|
|
{
|
|
T42_Face t42face = (T42_Face)face;
|
|
FT_Int i;
|
|
|
|
|
|
for ( i = 0; i < t42face->type1.num_glyphs; i++ )
|
|
{
|
|
FT_String* gname = t42face->type1.glyph_names[i];
|
|
|
|
|
|
if ( glyph_name[0] == gname[0] && !ft_strcmp( glyph_name, gname ) )
|
|
return (FT_UInt)ft_strtol(
|
|
(const char *)t42face->type1.charstrings[i],
|
|
NULL,
|
|
10 );
|
|
}
|
|
|
|
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
|
|
*
|
|
*/
|
|
|
|
FT_CALLBACK_DEF( const char* )
|
|
t42_get_ps_font_name( FT_Face face ) /* T42_Face */
|
|
{
|
|
T42_Face t42face = (T42_Face)face;
|
|
|
|
|
|
return (const char*)t42face->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
|
|
*
|
|
*/
|
|
|
|
FT_CALLBACK_DEF( 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;
|
|
}
|
|
|
|
|
|
FT_CALLBACK_DEF( 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;
|
|
}
|
|
|
|
|
|
FT_CALLBACK_DEF( FT_Int )
|
|
t42_ps_has_glyph_names( FT_Face face )
|
|
{
|
|
FT_UNUSED( face );
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
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 */
|
|
/* Type42 fonts don't have a Private dict */
|
|
(PS_GetFontPrivateFunc)NULL, /* 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,
|
|
|
|
NULL, /* 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 */
|
|
|
|
NULL, /* FT_Face_GetKerningFunc get_kerning */
|
|
NULL, /* FT_Face_AttachFunc attach_file */
|
|
NULL, /* FT_Face_GetAdvancesFunc get_advances */
|
|
|
|
T42_Size_Request, /* FT_Size_RequestFunc request_size */
|
|
T42_Size_Select /* FT_Size_SelectFunc select_size */
|
|
};
|
|
|
|
|
|
/* END */
|