ref: 61870c24fae357b78029ce54be0c004e1ffdb3c7
dir: /libfreetype/t42drivr.c/
/***************************************************************************/
/* */
/* t42drivr.c */
/* */
/* High-level Type 42 driver interface (body). */
/* */
/* Copyright 2002 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) The sfnts array is expected to be ASCII, not binary. */
/* 4) As for Type1 fonts, CDevProc is not supported. */
/* 5) The Metrics dictionary is not supported. */
/* 6) 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
#undef FT_COMPONENT
#define FT_COMPONENT trace_t42
static FT_Error
t42_get_glyph_name( T42_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 T42_Err_Ok;
}
static const char*
t42_get_ps_name( T42_Face face )
{
return (const char*)face->type1.font_name;
}
static FT_UInt
t42_get_name_index( T42_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_atoi( (const char *)face->type1.charstrings[i] );
}
return 0;
}
static FT_Module_Interface
T42_Get_Interface( FT_Driver driver,
const FT_String* t42_interface )
{
FT_UNUSED( driver );
/* Any additional interface are defined here */
if (ft_strcmp( (const char*)t42_interface, "glyph_name" ) == 0 )
return (FT_Module_Interface)t42_get_glyph_name;
if ( ft_strcmp( (const char*)t42_interface, "name_index" ) == 0 )
return (FT_Module_Interface)t42_get_name_index;
if ( ft_strcmp( (const char*)t42_interface, "postscript_name" ) == 0 )
return (FT_Module_Interface)t42_get_ps_name;
return 0;
}
const FT_Driver_ClassRec t42_driver_class =
{
{
ft_module_font_driver |
ft_module_driver_scalable |
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
ft_module_driver_has_hinter,
#else
0,
#endif
sizeof ( T42_DriverRec ),
"type42",
0x10000L,
0x20000L,
0, /* format interface */
(FT_Module_Constructor)T42_Driver_Init,
(FT_Module_Destructor) T42_Driver_Done,
(FT_Module_Requester) T42_Get_Interface,
},
sizeof ( T42_FaceRec ),
sizeof ( T42_SizeRec ),
sizeof ( T42_GlyphSlotRec ),
(FT_Face_InitFunc) T42_Face_Init,
(FT_Face_DoneFunc) T42_Face_Done,
(FT_Size_InitFunc) T42_Size_Init,
(FT_Size_DoneFunc) T42_Size_Done,
(FT_Slot_InitFunc) T42_GlyphSlot_Init,
(FT_Slot_DoneFunc) T42_GlyphSlot_Done,
(FT_Size_ResetPointsFunc) T42_Size_SetChars,
(FT_Size_ResetPixelsFunc) T42_Size_SetPixels,
(FT_Slot_LoadFunc) T42_GlyphSlot_Load,
(FT_Face_GetKerningFunc) 0,
(FT_Face_AttachFunc) 0,
(FT_Face_GetAdvancesFunc) 0
};
/* END */