ref: e623bfa8e2b4699619aaf27c687a20931fab87b1
dir: /src/cff/cffobjs.c/
/***************************************************************************/
/* */
/* cffobjs.c */
/* */
/* OpenType objects manager (body). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2005 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 FT_SERVICE_POSTSCRIPT_CMAPS_H
#include FT_INTERNAL_POSTSCRIPT_HINTS_H
#include "cffobjs.h"
#include "cffload.h"
#include "cffcmap.h"
#include "cfferrs.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. */
/* */
/*************************************************************************/
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
static FT_Error
sbit_size_reset( CFF_Size size )
{
CFF_Face face;
FT_Error error = CFF_Err_Ok;
FT_ULong strike_index;
FT_Size_Metrics* metrics;
FT_Size_Metrics* sbit_metrics;
SFNT_Service sfnt;
metrics = &size->root.metrics;
face = (CFF_Face)size->root.face;
sfnt = (SFNT_Service)face->sfnt;
sbit_metrics = &size->strike_metrics;
error = sfnt->set_sbit_strike( face,
metrics->x_ppem,
metrics->y_ppem,
&strike_index );
if ( !error )
{
/* XXX: TODO: move this code to the SFNT module where it belongs */
#ifdef FT_OPTIMIZE_MEMORY
FT_Byte* strike = face->sbit_table + 8 + strike_index*48;
sbit_metrics->ascender = (FT_Char)strike[16] << 6; /* hori.ascender */
sbit_metrics->descender = (FT_Char)strike[17] << 6; /* hori.descender */
/* XXX: Is this correct? */
sbit_metrics->max_advance = ( (FT_Char)strike[22] + /* min_origin_SB */
strike[18] + /* max_width */
(FT_Char)strike[23] /* min_advance_SB */
) << 6;
#else /* !OPTIMIZE_MEMORY */
TT_SBit_Strike strike = face->sbit_strikes + strike_index;
sbit_metrics->ascender = strike->hori.ascender << 6;
sbit_metrics->descender = strike->hori.descender << 6;
/* XXX: Is this correct? */
sbit_metrics->max_advance = ( strike->hori.min_origin_SB +
strike->hori.max_width +
strike->hori.min_advance_SB ) << 6;
#endif /* !OPTIMIZE_MEMORY */
/* XXX: Is this correct? */
sbit_metrics->height = sbit_metrics->ascender -
sbit_metrics->descender;
sbit_metrics->x_ppem = metrics->x_ppem;
sbit_metrics->y_ppem = metrics->y_ppem;
size->strike_index = (FT_UInt)strike_index;
}
else
{
size->strike_index = 0xFFFFU;
sbit_metrics->x_ppem = 0;
sbit_metrics->y_ppem = 0;
sbit_metrics->ascender = 0;
sbit_metrics->descender = 0;
sbit_metrics->height = 0;
sbit_metrics->max_advance = 0;
}
return error;
}
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
static PSH_Globals_Funcs
cff_size_get_globals_funcs( CFF_Size size )
{
CFF_Face face = (CFF_Face)size->root.face;
CFF_Font font = (CFF_FontRec *)face->extra.data;
PSHinter_Service pshinter = (PSHinter_Service)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;
if ( cffsize->internal )
{
PSH_Globals_Funcs funcs;
funcs = cff_size_get_globals_funcs( size );
if ( funcs )
funcs->destroy( (PSH_Globals)cffsize->internal );
cffsize->internal = 0;
}
}
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 )
{
PSH_Globals globals;
CFF_Face face = (CFF_Face)cffsize->face;
CFF_Font font = (CFF_FontRec *)face->extra.data;
CFF_SubFont subfont = &font->top_font;
CFF_Private cpriv = &subfont->private_dict;
PS_PrivateRec priv;
/* IMPORTANT: The CFF and Type1 private dictionaries have */
/* slightly different structures; we need to */
/* synthetize a type1 dictionary on the fly here. */
{
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;
}
error = funcs->create( cffsize->face->memory, &priv, &globals );
if ( !error )
cffsize->internal = (FT_Size_Internal)(void*)globals;
}
return error;
}
FT_LOCAL_DEF( FT_Error )
cff_size_reset( FT_Size cffsize, /* CFF_Size */
FT_UInt char_width,
FT_UInt char_height )
{
CFF_Size size = (CFF_Size)cffsize;
PSH_Globals_Funcs funcs = cff_size_get_globals_funcs( size );
FT_Error error = CFF_Err_Ok;
FT_Face face = cffsize->face;
FT_UNUSED( char_width );
FT_UNUSED( char_height );
if ( funcs )
error = funcs->set_scale( (PSH_Globals)cffsize->internal,
cffsize->metrics.x_scale,
cffsize->metrics.y_scale,
0, 0 );
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
if ( face->face_flags & FT_FACE_FLAG_FIXED_SIZES )
{
error = sbit_size_reset( size );
if ( !error && !( face->face_flags & FT_FACE_FLAG_SCALABLE ) )
cffsize->metrics = size->strike_metrics;
}
#endif
if ( face->face_flags & FT_FACE_FLAG_SCALABLE )
return CFF_Err_Ok;
else
return error;
}
FT_LOCAL_DEF( FT_Error )
cff_point_size_reset( FT_Size cffsize,
FT_F26Dot6 char_width,
FT_F26Dot6 char_height,
FT_UInt horz_resolution,
FT_UInt vert_resolution )
{
FT_UNUSED( char_width );
FT_UNUSED( char_height );
FT_UNUSED( horz_resolution );
FT_UNUSED( vert_resolution );
return cff_size_reset( cffsize, 0, 0 );
}
/*************************************************************************/
/* */
/* 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_FontRec *)face->extra.data;
PSHinter_Service pshinter = (PSHinter_Service)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 0;
}
/*************************************************************************/
/* */
/* FACE FUNCTIONS */
/* */
/*************************************************************************/
static FT_String*
cff_strcpy( FT_Memory memory,
const FT_String* source )
{
FT_Error error;
FT_String* result = 0;
FT_Int len = (FT_Int)ft_strlen( source );
if ( !FT_ALLOC( result, len + 1 ) )
{
FT_MEM_COPY( result, source, len );
result[len] = 0;
}
FT_UNUSED( error );
return result;
}
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;
#if 0
FT_FACE_FIND_GLOBAL_SERVICE( face, sfnt, SFNT );
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_NAMES );
FT_FACE_FIND_GLOBAL_SERVICE( face, pshinter, POSTSCRIPT_HINTER );
if ( !sfnt )
goto Bad_Format;
#else
sfnt = (SFNT_Service)FT_Get_Module_Interface(
cffface->driver->root.library, "sfnt" );
if ( !sfnt )
goto Bad_Format;
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
pshinter = (PSHinter_Service)FT_Get_Module_Interface(
cffface->driver->root.library, "pshinter" );
#endif
/* 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 != 0x4F54544FL ) /* `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,
face_index, num_params, params );
if ( error )
goto Exit;
}
else
{
/* load the `cmap' table explicitly */
error = sfnt->load_charmaps( 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( stream, face_index, cff );
if ( error )
goto Exit;
cff->pshinter = pshinter;
cff->psnames = (void*)psnames;
/* 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:" ));
FT_ERROR(( " cannot open CFF & CEF fonts\n" ));
FT_ERROR(( " " ));
FT_ERROR(( " without the `PSNames' module\n" ));
goto Bad_Format;
}
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 = dict->cid_count;
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;
cffface->bbox.xMax = ( dict->font_bbox.xMax + 0xFFFFU ) >> 16;
cffface->bbox.yMax = ( dict->font_bbox.yMax + 0xFFFFU ) >> 16;
cffface->ascender = (FT_Short)( cffface->bbox.yMax );
cffface->descender = (FT_Short)( cffface->bbox.yMin );
cffface->height = (FT_Short)(
( ( cffface->ascender - cffface->descender ) * 12 ) / 10 );
if ( !dict->units_per_em )
dict->units_per_em = 1000;
cffface->units_per_EM = dict->units_per_em;
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->name_index,
face_index );
if ( cffface->family_name )
{
char* full = cff_index_get_sid_string( &cff->string_index,
dict->full_name,
psnames );
char* fullp = full;
char* family = cffface->family_name;
char* family_name = 0;
if ( dict->family_name )
{
family_name = cff_index_get_sid_string( &cff->string_index,
dict->family_name,
psnames);
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 );
}
break;
}
if ( family_name )
FT_FREE( family_name );
FT_FREE( full );
}
}
else
{
char *cid_font_name =
cff_index_get_sid_string( &cff->string_index,
dict->cid_font_name,
psnames );
/* do we have a `/FontName' for a CID-keyed font? */
if ( cid_font_name )
cffface->family_name = 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_FACE_FLAG_SCALABLE | /* scalable outlines */
FT_FACE_FLAG_HORIZONTAL; /* horizontal data */
if ( sfnt_format )
flags |= FT_FACE_FLAG_SFNT;
/* fixed width font? */
if ( dict->is_fixed_pitch )
flags |= 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_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->string_index,
dict->weight,
psnames );
if ( weight )
if ( !ft_strcmp( weight, "Bold" ) ||
!ft_strcmp( weight, "Black" ) )
flags |= FT_STYLE_FLAG_BOLD;
FT_FREE( weight );
}
/* double check */
if ( !(flags & FT_STYLE_FLAG_BOLD) && cffface->style_name )
if ( !strncmp( cffface->style_name, "Bold", 4 ) ||
!strncmp( cffface->style_name, "Black", 5 ) )
flags |= FT_STYLE_FLAG_BOLD;
cffface->style_flags = flags;
}
else
{
if ( !dict->units_per_em )
dict->units_per_em = face->root.units_per_EM;
}
/* handle font matrix settings in subfonts (if any) */
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;
if ( sub->units_per_em )
{
FT_Matrix scale;
scale.xx = scale.yy = (FT_Fixed)FT_DivFix( top->units_per_em,
sub->units_per_em );
scale.xy = scale.yx = 0;
FT_Matrix_Multiply( &scale, &sub->font_matrix );
FT_Vector_Transform( &sub->font_offset, &scale );
}
else
{
sub->font_matrix = top->font_matrix;
sub->font_offset = top->font_offset;
}
}
#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
/*******************************************************************/
/* */
/* Compute char maps. */
/* */
/* Try to synthetize 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 (3,1)? */
if ( cmap->platform_id == 3 && cmap->encoding_id == 1 )
goto Skip_Unicode;
/* Deprecated Unicode platform id? */
if ( cmap->platform_id == 0 )
goto Skip_Unicode; /* Standard Unicode (deprecated) */
}
/* 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;
/* we didn't find a Unicode charmap -- synthetize one */
cmaprec.face = cffface;
cmaprec.platform_id = 3;
cmaprec.encoding_id = 1;
cmaprec.encoding = FT_ENCODING_UNICODE;
nn = (FT_UInt)cffface->num_charmaps;
FT_CMap_New( &cff_cmap_unicode_class_rec, NULL, &cmaprec, NULL );
/* 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:
if ( encoding->count > 0 )
{
FT_CMap_Class clazz;
cmaprec.face = cffface;
cmaprec.platform_id = 7; /* Adobe platform id */
if ( encoding->offset == 0 )
{
cmaprec.encoding_id = TT_ADOBE_ID_STANDARD;
cmaprec.encoding = FT_ENCODING_ADOBE_STANDARD;
clazz = &cff_cmap_encoding_class_rec;
}
else if ( encoding->offset == 1 )
{
cmaprec.encoding_id = TT_ADOBE_ID_EXPERT;
cmaprec.encoding = FT_ENCODING_ADOBE_EXPERT;
clazz = &cff_cmap_encoding_class_rec;
}
else
{
cmaprec.encoding_id = TT_ADOBE_ID_CUSTOM;
cmaprec.encoding = FT_ENCODING_ADOBE_CUSTOM;
clazz = &cff_cmap_encoding_class_rec;
}
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 = cffface->memory;
SFNT_Service 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 */