?? cffdrivr.c
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/***************************************************************************/
/* */
/* cffdrivr.c */
/* */
/* OpenType font driver implementation (body). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* 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. */
/* */
/***************************************************************************/
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include FT_INTERNAL_SFNT_H
#include FT_TRUETYPE_IDS_H
#include FT_SERVICE_POSTSCRIPT_CMAPS_H
#include FT_SERVICE_POSTSCRIPT_INFO_H
#include FT_SERVICE_TT_CMAP_H
#include "cffdrivr.h"
#include "cffgload.h"
#include "cffload.h"
#include "cffcmap.h"
#include "cfferrs.h"
#include FT_SERVICE_XFREE86_NAME_H
#include FT_SERVICE_GLYPH_DICT_H
/*************************************************************************/
/* */
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
/* messages during execution. */
/* */
#undef FT_COMPONENT
#define FT_COMPONENT trace_cffdriver
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** F A C E S ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
#undef PAIR_TAG
#define PAIR_TAG( left, right ) ( ( (FT_ULong)left << 16 ) | \
(FT_ULong)right )
/*************************************************************************/
/* */
/* <Function> */
/* cff_get_kerning */
/* */
/* <Description> */
/* A driver method used to return the kerning vector between two */
/* glyphs of the same face. */
/* */
/* <Input> */
/* face :: A handle to the source face object. */
/* */
/* left_glyph :: The index of the left glyph in the kern pair. */
/* */
/* right_glyph :: The index of the right glyph in the kern pair. */
/* */
/* <Output> */
/* kerning :: The kerning vector. This is in font units for */
/* scalable formats, and in pixels for fixed-sizes */
/* formats. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* Only horizontal layouts (left-to-right & right-to-left) are */
/* supported by this function. Other layouts, or more sophisticated */
/* kernings, are out of scope of this method (the basic driver */
/* interface is meant to be simple). */
/* */
/* They can be implemented by format-specific interfaces. */
/* */
FT_CALLBACK_DEF( FT_Error )
cff_get_kerning( FT_Face ttface, /* TT_Face */
FT_UInt left_glyph,
FT_UInt right_glyph,
FT_Vector* kerning )
{
TT_Face face = (TT_Face)ttface;
SFNT_Service sfnt = (SFNT_Service)face->sfnt;
kerning->x = 0;
kerning->y = 0;
if ( sfnt )
kerning->x = sfnt->get_kerning( face, left_glyph, right_glyph );
return CFF_Err_Ok;
}
#undef PAIR_TAG
/*************************************************************************/
/* */
/* <Function> */
/* Load_Glyph */
/* */
/* <Description> */
/* A driver method used to load a glyph within a given glyph slot. */
/* */
/* <Input> */
/* slot :: A handle to the target slot object where the glyph */
/* will be loaded. */
/* */
/* size :: A handle to the source face size at which the glyph */
/* must be scaled, loaded, etc. */
/* */
/* glyph_index :: The index of the glyph in the font file. */
/* */
/* load_flags :: A flag indicating what to load for this glyph. The */
/* FT_LOAD_??? constants can be used to control the */
/* glyph loading process (e.g., whether the outline */
/* should be scaled, whether to load bitmaps or not, */
/* whether to hint the outline, etc). */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_CALLBACK_DEF( FT_Error )
Load_Glyph( FT_GlyphSlot cffslot, /* CFF_GlyphSlot */
FT_Size cffsize, /* CFF_Size */
FT_UInt glyph_index,
FT_Int32 load_flags )
{
FT_Error error;
CFF_GlyphSlot slot = (CFF_GlyphSlot)cffslot;
CFF_Size size = (CFF_Size)cffsize;
if ( !slot )
return CFF_Err_Invalid_Slot_Handle;
/* check whether we want a scaled outline or bitmap */
if ( !size )
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
if ( load_flags & FT_LOAD_NO_SCALE )
size = NULL;
/* reset the size object if necessary */
if ( size )
{
/* these two objects must have the same parent */
if ( cffsize->face != cffslot->face )
return CFF_Err_Invalid_Face_Handle;
}
/* now load the glyph outline if necessary */
error = cff_slot_load( slot, size, glyph_index, load_flags );
/* force drop-out mode to 2 - irrelevant now */
/* slot->outline.dropout_mode = 2; */
return error;
}
/*
* GLYPH DICT SERVICE
*
*/
static FT_Error
cff_get_glyph_name( CFF_Face face,
FT_UInt glyph_index,
FT_Pointer buffer,
FT_UInt buffer_max )
{
CFF_Font font = (CFF_Font)face->extra.data;
FT_Memory memory = FT_FACE_MEMORY( face );
FT_String* gname;
FT_UShort sid;
FT_Service_PsCMaps psnames;
FT_Error error;
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
if ( !psnames )
{
FT_ERROR(( "cff_get_glyph_name:" ));
FT_ERROR(( " cannot get glyph name from CFF & CEF fonts\n" ));
FT_ERROR(( " " ));
FT_ERROR(( " without the `PSNames' module\n" ));
error = CFF_Err_Unknown_File_Format;
goto Exit;
}
/* first, locate the sid in the charset table */
sid = font->charset.sids[glyph_index];
/* now, lookup the name itself */
gname = cff_index_get_sid_string( &font->string_index, sid, psnames );
if ( gname && buffer_max > 0 )
{
FT_UInt len = (FT_UInt)ft_strlen( gname );
if ( len >= buffer_max )
len = buffer_max - 1;
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