170 lines
5.5 KiB
C
170 lines
5.5 KiB
C
/***************************************************************************/
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/* */
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/* t42drivr.c */
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/* */
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/* High-level Type 42 driver interface (body). */
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/* */
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/* Copyright 2002 by Roberto Alameda. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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/*************************************************************************/
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/* */
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/* This driver implements Type42 fonts as described in the */
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/* Technical Note #5012 from Adobe, with these limitations: */
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/* */
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/* 1) CID Fonts are not currently supported. */
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/* 2) Incremental fonts making use of the GlyphDirectory keyword */
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/* will be loaded, but the rendering will be using the TrueType */
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/* tables. */
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/* 3) The sfnts array is expected to be ASCII, not binary. */
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/* 4) As for Type1 fonts, CDevProc is not supported. */
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/* 5) The Metrics dictionary is not supported. */
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/* 6) AFM metrics are not supported. */
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/* */
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/* In other words, this driver supports Type42 fonts derived from */
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/* TrueType fonts in a non-CID manner, as done by usual conversion */
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/* programs. */
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/* */
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/*************************************************************************/
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#include "t42drivr.h"
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#include "t42objs.h"
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#include "t42error.h"
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#include FT_INTERNAL_DEBUG_H
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_t42
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static FT_Error
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t42_get_glyph_name( T42_Face face,
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FT_UInt glyph_index,
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FT_Pointer buffer,
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FT_UInt buffer_max )
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{
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FT_String* gname;
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gname = face->type1.glyph_names[glyph_index];
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if ( buffer_max > 0 )
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{
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FT_UInt len = (FT_UInt)( ft_strlen( gname ) );
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if ( len >= buffer_max )
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len = buffer_max - 1;
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FT_MEM_COPY( buffer, gname, len );
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((FT_Byte*)buffer)[len] = 0;
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}
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return T42_Err_Ok;
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}
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static const char*
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t42_get_ps_name( T42_Face face )
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{
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return (const char*)face->type1.font_name;
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}
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static FT_UInt
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t42_get_name_index( T42_Face face,
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FT_String* glyph_name )
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{
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FT_Int i;
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FT_String* gname;
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for ( i = 0; i < face->type1.num_glyphs; i++ )
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{
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gname = face->type1.glyph_names[i];
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if ( !ft_strcmp( glyph_name, gname ) )
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return ft_atoi( (const char *)face->type1.charstrings[i] );
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}
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return 0;
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}
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static FT_Module_Interface
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T42_Get_Interface( FT_Driver driver,
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const FT_String* t42_interface )
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{
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FT_UNUSED( driver );
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/* Any additional interface are defined here */
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if (ft_strcmp( (const char*)t42_interface, "glyph_name" ) == 0 )
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return (FT_Module_Interface)t42_get_glyph_name;
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if ( ft_strcmp( (const char*)t42_interface, "name_index" ) == 0 )
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return (FT_Module_Interface)t42_get_name_index;
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if ( ft_strcmp( (const char*)t42_interface, "postscript_name" ) == 0 )
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return (FT_Module_Interface)t42_get_ps_name;
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return 0;
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}
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const FT_Driver_ClassRec t42_driver_class =
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{
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{
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ft_module_font_driver |
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ft_module_driver_scalable |
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#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
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ft_module_driver_has_hinter,
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#else
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0,
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#endif
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sizeof ( T42_DriverRec ),
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"type42",
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0x10000L,
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0x20000L,
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0, /* format interface */
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(FT_Module_Constructor)T42_Driver_Init,
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(FT_Module_Destructor) T42_Driver_Done,
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(FT_Module_Requester) T42_Get_Interface,
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},
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sizeof ( T42_FaceRec ),
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sizeof ( T42_SizeRec ),
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sizeof ( T42_GlyphSlotRec ),
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(FT_Face_InitFunc) T42_Face_Init,
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(FT_Face_DoneFunc) T42_Face_Done,
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(FT_Size_InitFunc) T42_Size_Init,
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(FT_Size_DoneFunc) T42_Size_Done,
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(FT_Slot_InitFunc) T42_GlyphSlot_Init,
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(FT_Slot_DoneFunc) T42_GlyphSlot_Done,
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(FT_Size_ResetPointsFunc) T42_Size_SetChars,
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(FT_Size_ResetPixelsFunc) T42_Size_SetPixels,
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(FT_Slot_LoadFunc) T42_GlyphSlot_Load,
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(FT_Face_GetKerningFunc) 0,
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(FT_Face_AttachFunc) 0,
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(FT_Face_GetAdvancesFunc) 0
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};
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/* END */
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