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freetype2/src/cff/cffobjs.c

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/***************************************************************************/
/* */
/* cffobjs.c */
/* */
/* OpenType objects manager (body). */
/* */
/* Copyright 1996-2011 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_INTERNAL_DEBUG_H
#include FT_INTERNAL_CALC_H
#include FT_INTERNAL_STREAM_H
#include FT_ERRORS_H
#include FT_TRUETYPE_IDS_H
#include FT_TRUETYPE_TAGS_H
#include FT_INTERNAL_SFNT_H
#include "cffobjs.h"
#include "cffload.h"
#include "cffcmap.h"
#include "cfferrs.h"
#include "cffpic.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_cffobjs
/*************************************************************************/
/* */
/* SIZE FUNCTIONS */
/* */
/* Note that we store the global hints in the size's `internal' root */
/* field. */
/* */
/*************************************************************************/
static PSH_Globals_Funcs
cff_size_get_globals_funcs( CFF_Size size )
{
CFF_Face face = (CFF_Face)size->root.face;
CFF_Font font = (CFF_Font)face->extra.data;
PSHinter_Service pshinter = font->pshinter;
FT_Module module;
module = FT_Get_Module( size->root.face->driver->root.library,
"pshinter" );
return ( module && pshinter && pshinter->get_globals_funcs )
? pshinter->get_globals_funcs( module )
: 0;
}
FT_LOCAL_DEF( void )
cff_size_done( FT_Size cffsize ) /* CFF_Size */
{
CFF_Size size = (CFF_Size)cffsize;
CFF_Face face = (CFF_Face)size->root.face;
CFF_Font font = (CFF_Font)face->extra.data;
CFF_Internal internal = (CFF_Internal)cffsize->internal;
if ( internal )
{
PSH_Globals_Funcs funcs;
funcs = cff_size_get_globals_funcs( size );
if ( funcs )
{
FT_UInt i;
funcs->destroy( internal->topfont );
for ( i = font->num_subfonts; i > 0; i-- )
funcs->destroy( internal->subfonts[i - 1] );
}
/* `internal' is freed by destroy_size (in ftobjs.c) */
}
}
/* CFF and Type 1 private dictionaries have slightly different */
/* structures; we need to synthesize a Type 1 dictionary on the fly */
static void
cff_make_private_dict( CFF_SubFont subfont,
PS_Private priv )
{
CFF_Private cpriv = &subfont->private_dict;
FT_UInt n, count;
FT_MEM_ZERO( priv, sizeof ( *priv ) );
count = priv->num_blue_values = cpriv->num_blue_values;
for ( n = 0; n < count; n++ )
priv->blue_values[n] = (FT_Short)cpriv->blue_values[n];
count = priv->num_other_blues = cpriv->num_other_blues;
for ( n = 0; n < count; n++ )
priv->other_blues[n] = (FT_Short)cpriv->other_blues[n];
count = priv->num_family_blues = cpriv->num_family_blues;
for ( n = 0; n < count; n++ )
priv->family_blues[n] = (FT_Short)cpriv->family_blues[n];
count = priv->num_family_other_blues = cpriv->num_family_other_blues;
for ( n = 0; n < count; n++ )
priv->family_other_blues[n] = (FT_Short)cpriv->family_other_blues[n];
priv->blue_scale = cpriv->blue_scale;
priv->blue_shift = (FT_Int)cpriv->blue_shift;
priv->blue_fuzz = (FT_Int)cpriv->blue_fuzz;
priv->standard_width[0] = (FT_UShort)cpriv->standard_width;
priv->standard_height[0] = (FT_UShort)cpriv->standard_height;
count = priv->num_snap_widths = cpriv->num_snap_widths;
for ( n = 0; n < count; n++ )
priv->snap_widths[n] = (FT_Short)cpriv->snap_widths[n];
count = priv->num_snap_heights = cpriv->num_snap_heights;
for ( n = 0; n < count; n++ )
priv->snap_heights[n] = (FT_Short)cpriv->snap_heights[n];
priv->force_bold = cpriv->force_bold;
priv->language_group = cpriv->language_group;
priv->lenIV = cpriv->lenIV;
}
FT_LOCAL_DEF( FT_Error )
cff_size_init( FT_Size cffsize ) /* CFF_Size */
{
CFF_Size size = (CFF_Size)cffsize;
FT_Error error = CFF_Err_Ok;
PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size );
if ( funcs )
{
CFF_Face face = (CFF_Face)cffsize->face;
CFF_Font font = (CFF_Font)face->extra.data;
CFF_Internal internal;
PS_PrivateRec priv;
FT_Memory memory = cffsize->face->memory;
FT_UInt i;
if ( FT_NEW( internal ) )
goto Exit;
cff_make_private_dict( &font->top_font, &priv );
error = funcs->create( cffsize->face->memory, &priv,
&internal->topfont );
if ( error )
goto Exit;
for ( i = font->num_subfonts; i > 0; i-- )
{
CFF_SubFont sub = font->subfonts[i - 1];
cff_make_private_dict( sub, &priv );
error = funcs->create( cffsize->face->memory, &priv,
&internal->subfonts[i - 1] );
if ( error )
goto Exit;
}
cffsize->internal = (FT_Size_Internal)(void*)internal;
}
size->strike_index = 0xFFFFFFFFUL;
Exit:
return error;
}
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
FT_LOCAL_DEF( FT_Error )
cff_size_select( FT_Size size,
FT_ULong strike_index )
{
CFF_Size cffsize = (CFF_Size)size;
PSH_Globals_Funcs funcs;
cffsize->strike_index = strike_index;
FT_Select_Metrics( size->face, strike_index );
funcs = cff_size_get_globals_funcs( cffsize );
if ( funcs )
{
CFF_Face face = (CFF_Face)size->face;
CFF_Font font = (CFF_Font)face->extra.data;
CFF_Internal internal = (CFF_Internal)size->internal;
FT_ULong top_upm = font->top_font.font_dict.units_per_em;
FT_UInt i;
funcs->set_scale( internal->topfont,
size->metrics.x_scale, size->metrics.y_scale,
0, 0 );
for ( i = font->num_subfonts; i > 0; i-- )
{
CFF_SubFont sub = font->subfonts[i - 1];
FT_ULong sub_upm = sub->font_dict.units_per_em;
FT_Pos x_scale, y_scale;
if ( top_upm != sub_upm )
{
x_scale = FT_MulDiv( size->metrics.x_scale, top_upm, sub_upm );
y_scale = FT_MulDiv( size->metrics.y_scale, top_upm, sub_upm );
}
else
{
x_scale = size->metrics.x_scale;
y_scale = size->metrics.y_scale;
}
funcs->set_scale( internal->subfonts[i - 1],
x_scale, y_scale, 0, 0 );
}
}
return CFF_Err_Ok;
}
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
FT_LOCAL_DEF( FT_Error )
cff_size_request( FT_Size size,
FT_Size_Request req )
{
CFF_Size cffsize = (CFF_Size)size;
PSH_Globals_Funcs funcs;
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
if ( FT_HAS_FIXED_SIZES( size->face ) )
{
CFF_Face cffface = (CFF_Face)size->face;
SFNT_Service sfnt = (SFNT_Service)cffface->sfnt;
FT_ULong strike_index;
if ( sfnt->set_sbit_strike( cffface, req, &strike_index ) )
cffsize->strike_index = 0xFFFFFFFFUL;
else
return cff_size_select( size, strike_index );
}
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
FT_Request_Metrics( size->face, req );
funcs = cff_size_get_globals_funcs( cffsize );
if ( funcs )
{
CFF_Face cffface = (CFF_Face)size->face;
CFF_Font font = (CFF_Font)cffface->extra.data;
CFF_Internal internal = (CFF_Internal)size->internal;
FT_ULong top_upm = font->top_font.font_dict.units_per_em;
FT_UInt i;
funcs->set_scale( internal->topfont,
size->metrics.x_scale, size->metrics.y_scale,
0, 0 );
for ( i = font->num_subfonts; i > 0; i-- )
{
CFF_SubFont sub = font->subfonts[i - 1];
FT_ULong sub_upm = sub->font_dict.units_per_em;
FT_Pos x_scale, y_scale;
if ( top_upm != sub_upm )
{
x_scale = FT_MulDiv( size->metrics.x_scale, top_upm, sub_upm );
y_scale = FT_MulDiv( size->metrics.y_scale, top_upm, sub_upm );
}
else
{
x_scale = size->metrics.x_scale;
y_scale = size->metrics.y_scale;
}
funcs->set_scale( internal->subfonts[i - 1],
x_scale, y_scale, 0, 0 );
}
}
return CFF_Err_Ok;
}
/*************************************************************************/
/* */
/* SLOT FUNCTIONS */
/* */
/*************************************************************************/
FT_LOCAL_DEF( void )
cff_slot_done( FT_GlyphSlot slot )
{
slot->internal->glyph_hints = 0;
}
FT_LOCAL_DEF( FT_Error )
cff_slot_init( FT_GlyphSlot slot )
{
CFF_Face face = (CFF_Face)slot->face;
CFF_Font font = (CFF_Font)face->extra.data;
PSHinter_Service pshinter = font->pshinter;
if ( pshinter )
{
FT_Module module;
module = FT_Get_Module( slot->face->driver->root.library,
"pshinter" );
if ( module )
{
T2_Hints_Funcs funcs;
funcs = pshinter->get_t2_funcs( module );
slot->internal->glyph_hints = (void*)funcs;
}
}
return CFF_Err_Ok;
}
/*************************************************************************/
/* */
/* FACE FUNCTIONS */
/* */
/*************************************************************************/
static FT_String*
cff_strcpy( FT_Memory memory,
const FT_String* source )
{
FT_Error error;
FT_String* result;
(void)FT_STRDUP( result, source );
FT_UNUSED( error );
return result;
}
/* Strip all subset prefixes of the form `ABCDEF+'. Usually, there */
/* is only one, but font names like `APCOOG+JFABTD+FuturaBQ-Bold' */
/* have been seen in the wild. */
static void
remove_subset_prefix( FT_String* name )
{
FT_Int32 idx = 0;
FT_Int32 length = strlen( name ) + 1;
FT_Bool continue_search = 1;
while ( continue_search )
{
if ( length >= 7 && name[6] == '+' )
{
for ( idx = 0; idx < 6; idx++ )
{
/* ASCII uppercase letters */
if ( !( 'A' <= name[idx] && name[idx] <= 'Z' ) )
continue_search = 0;
}
if ( continue_search )
{
for ( idx = 7; idx < length; idx++ )
name[idx - 7] = name[idx];
length -= 7;
}
}
else
continue_search = 0;
}
}
/* Remove the style part from the family name (if present). */
static void
remove_style( FT_String* family_name,
const FT_String* style_name )
{
FT_Int32 family_name_length, style_name_length;
family_name_length = strlen( family_name );
style_name_length = strlen( style_name );
if ( family_name_length > style_name_length )
{
FT_Int idx;
for ( idx = 1; idx <= style_name_length; ++idx )
{
if ( family_name[family_name_length - idx] !=
style_name[style_name_length - idx] )
break;
}
if ( idx > style_name_length )
{
/* family_name ends with style_name; remove it */
idx = family_name_length - style_name_length - 1;
/* also remove special characters */
/* between real family name and style */
while ( idx > 0 &&
( family_name[idx] == '-' ||
family_name[idx] == ' ' ||
family_name[idx] == '_' ||
family_name[idx] == '+' ) )
--idx;
if ( idx > 0 )
family_name[idx + 1] = '\0';
}
}
}
FT_LOCAL_DEF( FT_Error )
cff_face_init( FT_Stream stream,
FT_Face cffface, /* CFF_Face */
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
CFF_Face face = (CFF_Face)cffface;
FT_Error error;
SFNT_Service sfnt;
FT_Service_PsCMaps psnames;
PSHinter_Service pshinter;
FT_Bool pure_cff = 1;
FT_Bool sfnt_format = 0;
FT_Library library = cffface->driver->root.library;
sfnt = (SFNT_Service)FT_Get_Module_Interface(
library, "sfnt" );
if ( !sfnt )
goto Bad_Format;
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
pshinter = (PSHinter_Service)FT_Get_Module_Interface(
library, "pshinter" );
/* create input stream from resource */
if ( FT_STREAM_SEEK( 0 ) )
goto Exit;
/* check whether we have a valid OpenType file */
error = sfnt->init_face( stream, face, face_index, num_params, params );
if ( !error )
{
if ( face->format_tag != TTAG_OTTO ) /* `OTTO'; OpenType/CFF font */
{
FT_TRACE2(( "[not a valid OpenType/CFF font]\n" ));
goto Bad_Format;
}
/* if we are performing a simple font format check, exit immediately */
if ( face_index < 0 )
return CFF_Err_Ok;
/* UNDOCUMENTED! A CFF in an SFNT can have only a single font. */
if ( face_index > 0 )
{
FT_ERROR(( "cff_face_init: invalid face index\n" ));
error = CFF_Err_Invalid_Argument;
goto Exit;
}
sfnt_format = 1;
/* now, the font can be either an OpenType/CFF font, or an SVG CEF */
/* font; in the latter case it doesn't have a `head' table */
error = face->goto_table( face, TTAG_head, stream, 0 );
if ( !error )
{
pure_cff = 0;
/* load font directory */
error = sfnt->load_face( stream, face, 0, num_params, params );
if ( error )
goto Exit;
}
else
{
/* load the `cmap' table explicitly */
error = sfnt->load_cmap( face, stream );
if ( error )
goto Exit;
/* XXX: we don't load the GPOS table, as OpenType Layout */
/* support will be added later to a layout library on top of */
/* FreeType 2 */
}
/* now load the CFF part of the file */
error = face->goto_table( face, TTAG_CFF, stream, 0 );
if ( error )
goto Exit;
}
else
{
/* rewind to start of file; we are going to load a pure-CFF font */
if ( FT_STREAM_SEEK( 0 ) )
goto Exit;
error = CFF_Err_Ok;
}
/* now load and parse the CFF table in the file */
{
CFF_Font cff;
CFF_FontRecDict dict;
FT_Memory memory = cffface->memory;
FT_Int32 flags;
FT_UInt i;
if ( FT_NEW( cff ) )
goto Exit;
face->extra.data = cff;
error = cff_font_load( library, stream, face_index, cff, pure_cff );
if ( error )
goto Exit;
cff->pshinter = pshinter;
cff->psnames = psnames;
cffface->face_index = face_index;
/* Complement the root flags with some interesting information. */
/* Note that this is only necessary for pure CFF and CEF fonts; */
/* SFNT based fonts use the `name' table instead. */
cffface->num_glyphs = cff->num_glyphs;
dict = &cff->top_font.font_dict;
/* we need the `PSNames' module for CFF and CEF formats */
/* which aren't CID-keyed */
if ( dict->cid_registry == 0xFFFFU && !psnames )
{
FT_ERROR(( "cff_face_init:"
" cannot open CFF & CEF fonts\n"
" "
" without the `PSNames' module\n" ));
goto Bad_Format;
}
if ( !dict->units_per_em )
dict->units_per_em = pure_cff ? 1000 : face->root.units_per_EM;
/* Normalize the font matrix so that `matrix->xx' is 1; the */
/* scaling is done with `units_per_em' then (at this point, */
/* it already contains the scaling factor, but without */
/* normalization of the matrix). */
/* */
/* Note that the offsets must be expressed in integer font */
/* units. */
{
FT_Matrix* matrix = &dict->font_matrix;
FT_Vector* offset = &dict->font_offset;
FT_ULong* upm = &dict->units_per_em;
FT_Fixed temp = FT_ABS( matrix->yy );
if ( temp != 0x10000L )
{
*upm = FT_DivFix( *upm, temp );
matrix->xx = FT_DivFix( matrix->xx, temp );
matrix->yx = FT_DivFix( matrix->yx, temp );
matrix->xy = FT_DivFix( matrix->xy, temp );
matrix->yy = FT_DivFix( matrix->yy, temp );
offset->x = FT_DivFix( offset->x, temp );
offset->y = FT_DivFix( offset->y, temp );
}
offset->x >>= 16;
offset->y >>= 16;
}
for ( i = cff->num_subfonts; i > 0; i-- )
{
CFF_FontRecDict sub = &cff->subfonts[i - 1]->font_dict;
CFF_FontRecDict top = &cff->top_font.font_dict;
FT_Matrix* matrix;
FT_Vector* offset;
FT_ULong* upm;
FT_Fixed temp;
if ( sub->units_per_em )
{
FT_Long scaling;
if ( top->units_per_em > 1 && sub->units_per_em > 1 )
scaling = FT_MIN( top->units_per_em, sub->units_per_em );
else
scaling = 1;
FT_Matrix_Multiply_Scaled( &top->font_matrix,
&sub->font_matrix,
scaling );
FT_Vector_Transform_Scaled( &sub->font_offset,
&top->font_matrix,
scaling );
sub->units_per_em = FT_MulDiv( sub->units_per_em,
top->units_per_em,
scaling );
}
else
{
sub->font_matrix = top->font_matrix;
sub->font_offset = top->font_offset;
sub->units_per_em = top->units_per_em;
}
matrix = &sub->font_matrix;
offset = &sub->font_offset;
upm = &sub->units_per_em;
temp = FT_ABS( matrix->yy );
if ( temp != 0x10000L )
{
*upm = FT_DivFix( *upm, temp );
/* if *upm is larger than 100*1000 we divide by 1000 -- */
/* this can happen if e.g. there is no top-font FontMatrix */
/* and the subfont FontMatrix already contains the complete */
/* scaling for the subfont (see section 5.11 of the PLRM) */
/* 100 is a heuristic value */
if ( *upm > 100L * 1000L )
*upm = ( *upm + 500 ) / 1000;
matrix->xx = FT_DivFix( matrix->xx, temp );
matrix->yx = FT_DivFix( matrix->yx, temp );
matrix->xy = FT_DivFix( matrix->xy, temp );
matrix->yy = FT_DivFix( matrix->yy, temp );
offset->x = FT_DivFix( offset->x, temp );
offset->y = FT_DivFix( offset->y, temp );
}
offset->x >>= 16;
offset->y >>= 16;
}
if ( pure_cff )
{
char* style_name = NULL;
/* set up num_faces */
cffface->num_faces = cff->num_faces;
/* compute number of glyphs */
if ( dict->cid_registry != 0xFFFFU )
cffface->num_glyphs = cff->charset.max_cid + 1;
else
cffface->num_glyphs = cff->charstrings_index.count;
/* set global bbox, as well as EM size */
cffface->bbox.xMin = dict->font_bbox.xMin >> 16;
cffface->bbox.yMin = dict->font_bbox.yMin >> 16;
/* no `U' suffix here to 0xFFFF! */
cffface->bbox.xMax = ( dict->font_bbox.xMax + 0xFFFF ) >> 16;
cffface->bbox.yMax = ( dict->font_bbox.yMax + 0xFFFF ) >> 16;
cffface->units_per_EM = (FT_UShort)( dict->units_per_em );
cffface->ascender = (FT_Short)( cffface->bbox.yMax );
cffface->descender = (FT_Short)( cffface->bbox.yMin );
cffface->height = (FT_Short)( ( cffface->units_per_EM * 12 ) / 10 );
if ( cffface->height < cffface->ascender - cffface->descender )
cffface->height = (FT_Short)( cffface->ascender - cffface->descender );
cffface->underline_position =
(FT_Short)( dict->underline_position >> 16 );
cffface->underline_thickness =
(FT_Short)( dict->underline_thickness >> 16 );
/* retrieve font family & style name */
cffface->family_name = cff_index_get_name( cff, face_index );
if ( cffface->family_name )
{
char* full = cff_index_get_sid_string( cff,
dict->full_name );
char* fullp = full;
char* family = cffface->family_name;
char* family_name = NULL;
remove_subset_prefix( cffface->family_name );
if ( dict->family_name )
{
family_name = cff_index_get_sid_string( cff,
dict->family_name );
if ( family_name )
family = family_name;
}
/* We try to extract the style name from the full name. */
/* We need to ignore spaces and dashes during the search. */
if ( full && family )
{
while ( *fullp )
{
/* skip common characters at the start of both strings */
if ( *fullp == *family )
{
family++;
fullp++;
continue;
}
/* ignore spaces and dashes in full name during comparison */
if ( *fullp == ' ' || *fullp == '-' )
{
fullp++;
continue;
}
/* ignore spaces and dashes in family name during comparison */
if ( *family == ' ' || *family == '-' )
{
family++;
continue;
}
if ( !*family && *fullp )
{
/* The full name begins with the same characters as the */
/* family name, with spaces and dashes removed. In this */
/* case, the remaining string in `fullp' will be used as */
/* the style name. */
style_name = cff_strcpy( memory, fullp );
/* remove the style part from the family name (if present) */
remove_style( cffface->family_name, style_name );
}
break;
}
}
}
else
{
char *cid_font_name =
cff_index_get_sid_string( cff,
dict->cid_font_name );
/* do we have a `/FontName' for a CID-keyed font? */
if ( cid_font_name )
cffface->family_name = cff_strcpy( memory, cid_font_name );
}
if ( style_name )
cffface->style_name = style_name;
else
/* assume "Regular" style if we don't know better */
cffface->style_name = cff_strcpy( memory, (char *)"Regular" );
/*******************************************************************/
/* */
/* Compute face flags. */
/* */
flags = (FT_UInt32)( FT_FACE_FLAG_SCALABLE | /* scalable outlines */
FT_FACE_FLAG_HORIZONTAL | /* horizontal data */
FT_FACE_FLAG_HINTER ); /* has native hinter */
if ( sfnt_format )
flags |= (FT_UInt32)FT_FACE_FLAG_SFNT;
/* fixed width font? */
if ( dict->is_fixed_pitch )
flags |= (FT_UInt32)FT_FACE_FLAG_FIXED_WIDTH;
/* XXX: WE DO NOT SUPPORT KERNING METRICS IN THE GPOS TABLE FOR NOW */
#if 0
/* kerning available? */
if ( face->kern_pairs )
flags |= (FT_UInt32)FT_FACE_FLAG_KERNING;
#endif
cffface->face_flags = flags;
/*******************************************************************/
/* */
/* Compute style flags. */
/* */
flags = 0;
if ( dict->italic_angle )
flags |= FT_STYLE_FLAG_ITALIC;
{
char *weight = cff_index_get_sid_string( cff,
dict->weight );
if ( weight )
if ( !ft_strcmp( weight, "Bold" ) ||
!ft_strcmp( weight, "Black" ) )
flags |= FT_STYLE_FLAG_BOLD;
}
/* double check */
if ( !(flags & FT_STYLE_FLAG_BOLD) && cffface->style_name )
if ( !ft_strncmp( cffface->style_name, "Bold", 4 ) ||
!ft_strncmp( cffface->style_name, "Black", 5 ) )
flags |= FT_STYLE_FLAG_BOLD;
cffface->style_flags = flags;
}
#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
/* CID-keyed CFF fonts don't have glyph names -- the SFNT loader */
/* has unset this flag because of the 3.0 `post' table. */
if ( dict->cid_registry == 0xFFFFU )
cffface->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
#endif
if ( dict->cid_registry != 0xFFFFU && pure_cff )
cffface->face_flags |= FT_FACE_FLAG_CID_KEYED;
/*******************************************************************/
/* */
/* Compute char maps. */
/* */
/* Try to synthesize a Unicode charmap if there is none available */
/* already. If an OpenType font contains a Unicode "cmap", we */
/* will use it, whatever be in the CFF part of the file. */
{
FT_CharMapRec cmaprec;
FT_CharMap cmap;
FT_UInt nn;
CFF_Encoding encoding = &cff->encoding;
for ( nn = 0; nn < (FT_UInt)cffface->num_charmaps; nn++ )
{
cmap = cffface->charmaps[nn];
/* Windows Unicode? */
if ( cmap->platform_id == TT_PLATFORM_MICROSOFT &&
cmap->encoding_id == TT_MS_ID_UNICODE_CS )
goto Skip_Unicode;
/* Apple Unicode platform id? */
if ( cmap->platform_id == TT_PLATFORM_APPLE_UNICODE )
goto Skip_Unicode; /* Apple Unicode */
}
/* since CID-keyed fonts don't contain glyph names, we can't */
/* construct a cmap */
if ( pure_cff && cff->top_font.font_dict.cid_registry != 0xFFFFU )
goto Exit;
#ifdef FT_MAX_CHARMAP_CACHEABLE
if ( nn + 1 > FT_MAX_CHARMAP_CACHEABLE )
{
FT_ERROR(( "cff_face_init: no Unicode cmap is found, "
"and too many subtables (%d) to add synthesized cmap\n",
nn ));
goto Exit;
}
#endif
/* we didn't find a Unicode charmap -- synthesize one */
cmaprec.face = cffface;
cmaprec.platform_id = TT_PLATFORM_MICROSOFT;
cmaprec.encoding_id = TT_MS_ID_UNICODE_CS;
cmaprec.encoding = FT_ENCODING_UNICODE;
nn = (FT_UInt)cffface->num_charmaps;
error = FT_CMap_New( &FT_CFF_CMAP_UNICODE_CLASS_REC_GET, NULL,
&cmaprec, NULL );
if ( error && FT_Err_No_Unicode_Glyph_Name != error )
goto Exit;
error = FT_Err_Ok;
/* if no Unicode charmap was previously selected, select this one */
if ( cffface->charmap == NULL && nn != (FT_UInt)cffface->num_charmaps )
cffface->charmap = cffface->charmaps[nn];
Skip_Unicode:
#ifdef FT_MAX_CHARMAP_CACHEABLE
if ( nn > FT_MAX_CHARMAP_CACHEABLE )
{
FT_ERROR(( "cff_face_init: Unicode cmap is found, "
"but too many preceding subtables (%d) to access\n",
nn - 1 ));
goto Exit;
}
#endif
if ( encoding->count > 0 )
{
FT_CMap_Class clazz;
cmaprec.face = cffface;
cmaprec.platform_id = TT_PLATFORM_ADOBE; /* Adobe platform id */
if ( encoding->offset == 0 )
{
cmaprec.encoding_id = TT_ADOBE_ID_STANDARD;
cmaprec.encoding = FT_ENCODING_ADOBE_STANDARD;
clazz = &FT_CFF_CMAP_ENCODING_CLASS_REC_GET;
}
else if ( encoding->offset == 1 )
{
cmaprec.encoding_id = TT_ADOBE_ID_EXPERT;
cmaprec.encoding = FT_ENCODING_ADOBE_EXPERT;
clazz = &FT_CFF_CMAP_ENCODING_CLASS_REC_GET;
}
else
{
cmaprec.encoding_id = TT_ADOBE_ID_CUSTOM;
cmaprec.encoding = FT_ENCODING_ADOBE_CUSTOM;
clazz = &FT_CFF_CMAP_ENCODING_CLASS_REC_GET;
}
error = FT_CMap_New( clazz, NULL, &cmaprec, NULL );
}
}
}
Exit:
return error;
Bad_Format:
error = CFF_Err_Unknown_File_Format;
goto Exit;
}
FT_LOCAL_DEF( void )
cff_face_done( FT_Face cffface ) /* CFF_Face */
{
CFF_Face face = (CFF_Face)cffface;
FT_Memory memory;
SFNT_Service sfnt;
if ( !face )
return;
memory = cffface->memory;
sfnt = (SFNT_Service)face->sfnt;
if ( sfnt )
sfnt->done_face( face );
{
CFF_Font cff = (CFF_Font)face->extra.data;
if ( cff )
{
cff_font_done( cff );
FT_FREE( face->extra.data );
}
}
}
FT_LOCAL_DEF( FT_Error )
cff_driver_init( FT_Module module )
{
FT_UNUSED( module );
return CFF_Err_Ok;
}
FT_LOCAL_DEF( void )
cff_driver_done( FT_Module module )
{
FT_UNUSED( module );
}
/* END */
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