ref: 53b3fa1da5e3397388f3483ccc95910eca4a419d
dir: /src/cff/cffobjs.c/
/***************************************************************************/
/* */
/* cffobjs.c */
/* */
/* OpenType objects manager (body). */
/* */
/* Copyright 1996-2001 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_INTERNAL_POSTSCRIPT_NAMES_H
#include FT_INTERNAL_POSTSCRIPT_HINTS_H
#include "cffobjs.h"
#include "cffload.h"
#include "cfferrs.h"
#include <string.h> /* for strlen() */
/*************************************************************************/
/* */
/* 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->face;
CFF_Font* font = face->extra.data;
PSHinter_Interface* pshinter = font->pshinter;
FT_Module module;
module = FT_Get_Module( size->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( CFF_Size size )
{
if ( size->internal )
{
PSH_Globals_Funcs funcs;
funcs = CFF_Size_Get_Globals_Funcs( size );
if ( funcs )
funcs->destroy( (PSH_Globals)size->internal );
size->internal = 0;
}
}
FT_LOCAL_DEF FT_Error
CFF_Size_Init( CFF_Size size )
{
FT_Error error = 0;
PSH_Globals_Funcs funcs = CFF_Size_Get_Globals_Funcs( size );
if ( funcs )
{
PSH_Globals globals;
CFF_Face face = (CFF_Face)size->face;
CFF_Font* font = face->extra.data;
CFF_SubFont* subfont = &font->top_font;
CFF_Private* cpriv = &subfont->private_dict;
T1_Private 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;
MEM_Set( &priv, 0, 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 = cpriv->blue_shift;
priv.blue_fuzz = 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( size->face->memory, &priv, &globals );
if ( !error )
size->internal = (FT_Size_Internal)(void*)globals;
}
return error;
}
FT_LOCAL_DEF FT_Error
CFF_Size_Reset( CFF_Size size )
{
PSH_Globals_Funcs funcs = CFF_Size_Get_Globals_Funcs( size );
FT_Error error = 0;
if ( funcs )
error = funcs->set_scale( (PSH_Globals)size->internal,
size->metrics.x_scale,
size->metrics.y_scale,
0, 0 );
return error;
}
/*************************************************************************/
/* */
/* SLOT FUNCTIONS */
/* */
/*************************************************************************/
FT_LOCAL_DEF void
CFF_GlyphSlot_Done( CFF_GlyphSlot slot )
{
slot->root.internal->glyph_hints = 0;
}
FT_LOCAL_DEF FT_Error
CFF_GlyphSlot_Init( CFF_GlyphSlot slot )
{
CFF_Face face = (CFF_Face)slot->root.face;
CFF_Font* font = face->extra.data;
PSHinter_Interface* pshinter = font->pshinter;
if ( pshinter )
{
FT_Module module;
module = FT_Get_Module( slot->root.face->driver->root.library,
"pshinter" );
if ( module )
{
T2_Hints_Funcs funcs;
funcs = pshinter->get_t2_funcs( module );
slot->root.internal->glyph_hints = (void*)funcs;
}
}
return 0;
}
/*************************************************************************/
/* */
/* FACE FUNCTIONS */
/* */
/*************************************************************************/
static FT_String*
CFF_StrCopy( FT_Memory memory,
const FT_String* source )
{
FT_Error error;
FT_String* result = 0;
FT_Int len = (FT_Int)strlen( source );
if ( !ALLOC( result, len + 1 ) )
{
MEM_Copy( result, source, len );
result[len] = 0;
}
FT_UNUSED( error );
return result;
}
#if 0
/* this function is used to build a Unicode charmap from the glyph names */
/* in a file */
static FT_Error
CFF_Build_Unicode_Charmap( CFF_Face face,
FT_ULong base_offset,
PSNames_Interface* psnames )
{
CFF_Font* font = (CFF_Font*)face->extra.data;
FT_Memory memory = FT_FACE_MEMORY(face);
FT_UInt n, num_glyphs = face->root.num_glyphs;
const char** glyph_names;
FT_Error error;
CFF_Font_Dict* dict = &font->top_font.font_dict;
FT_ULong charset_offset;
FT_Byte format;
FT_Stream stream = face->root.stream;
charset_offset = dict->charset_offset;
if ( !charset_offset )
{
FT_ERROR(( "CFF_Build_Unicode_Charmap: charset table is missing\n" ));
error = CFF_Err_Invalid_File_Format;
goto Exit;
}
/* allocate the charmap */
if ( ALLOC( face->charmap, ...
/* seek to charset table and allocate glyph names table */
if ( FILE_Seek( base_offset + charset_offset ) ||
ALLOC_ARRAY( glyph_names, num_glyphs, const char* ) )
goto Exit;
/* now, read each glyph name and store it in the glyph name table */
if ( READ_Byte( format ) )
goto Fail;
switch ( format )
{
case 0: /* format 0 - one SID per glyph */
{
const char** gname = glyph_names;
const char** limit = gname + num_glyphs;
if ( ACCESS_Frame( num_glyphs * 2 ) )
goto Fail;
for ( ; gname < limit; gname++ )
gname[0] = CFF_Get_String( &font->string_index,
GET_UShort(),
psnames );
FORGET_Frame();
break;
}
case 1: /* format 1 - sequential ranges */
case 2: /* format 2 - sequential ranges with 16-bit counts */
{
const char** gname = glyph_names;
const char** limit = gname + num_glyphs;
FT_UInt len = 3;
if ( format == 2 )
len++;
while ( gname < limit )
{
FT_UInt first;
FT_UInt count;
if ( ACCESS_Frame( len ) )
goto Fail;
first = GET_UShort();
if ( format == 3 )
count = GET_UShort();
else
count = GET_Byte();
FORGET_Frame();
for ( ; count > 0; count-- )
{
gname[0] = CFF_Get_String( &font->string_index,
first,
psnames );
gname++;
first++;
}
}
break;
}
default: /* unknown charset format! */
FT_ERROR(( "CFF_Build_Unicode_Charmap: unknown charset format!\n" ));
error = CFF_Err_Invalid_File_Format;
goto Fail;
}
/* all right, the glyph names were loaded; we now need to create */
/* the corresponding unicode charmap */
Fail:
for ( n = 0; n < num_glyphs; n++ )
FREE( glyph_names[n] );
FREE( glyph_names );
Exit:
return error;
}
#endif /* 0 */
static FT_Encoding
find_encoding( int platform_id,
int encoding_id )
{
typedef struct TEncoding
{
int platform_id;
int encoding_id;
FT_Encoding encoding;
} TEncoding;
static
const TEncoding tt_encodings[] =
{
{ TT_PLATFORM_ISO, -1, ft_encoding_unicode },
{ TT_PLATFORM_APPLE_UNICODE, -1, ft_encoding_unicode },
{ TT_PLATFORM_MACINTOSH, TT_MAC_ID_ROMAN, ft_encoding_apple_roman },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_UNICODE_CS, ft_encoding_unicode },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_SJIS, ft_encoding_sjis },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_GB2312, ft_encoding_gb2312 },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_BIG_5, ft_encoding_big5 },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_WANSUNG, ft_encoding_wansung },
{ TT_PLATFORM_MICROSOFT, TT_MS_ID_JOHAB, ft_encoding_johab }
};
const TEncoding *cur, *limit;
cur = tt_encodings;
limit = cur + sizeof ( tt_encodings ) / sizeof ( tt_encodings[0] );
for ( ; cur < limit; cur++ )
{
if ( cur->platform_id == platform_id )
{
if ( cur->encoding_id == encoding_id ||
cur->encoding_id == -1 )
return cur->encoding;
}
}
return ft_encoding_none;
}
/*************************************************************************/
/* */
/* <Function> */
/* CFF_Face_Init */
/* */
/* <Description> */
/* Initializes a given OpenType face object. */
/* */
/* <Input> */
/* stream :: The source font stream. */
/* */
/* face_index :: The index of the font face in the resource. */
/* */
/* num_params :: Number of additional generic parameters. Ignored. */
/* */
/* params :: Additional generic parameters. Ignored. */
/* */
/* <InOut> */
/* face :: The newly built face object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF FT_Error
CFF_Face_Init( FT_Stream stream,
CFF_Face face,
FT_Int face_index,
FT_Int num_params,
FT_Parameter* params )
{
FT_Error error;
SFNT_Interface* sfnt;
PSNames_Interface* psnames;
PSHinter_Interface* pshinter;
FT_Bool pure_cff = 1;
FT_Bool sfnt_format = 0;
sfnt = (SFNT_Interface*)FT_Get_Module_Interface(
face->root.driver->root.library, "sfnt" );
if ( !sfnt )
goto Bad_Format;
psnames = (PSNames_Interface*)FT_Get_Module_Interface(
face->root.driver->root.library, "psnames" );
pshinter = (PSHinter_Interface*)FT_Get_Module_Interface(
face->root.driver->root.library, "pshinter" );
/* create input stream from resource */
if ( FILE_Seek( 0 ) )
goto Exit;
/* check that 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;
sfnt_format = 1;
/* now, the font can be either an OpenType/CFF font, or an SVG CEF */
/* font in the later 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 by hand */
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 ( FILE_Seek( 0 ) )
goto Exit;
error = CFF_Err_Ok;
}
/* now load and parse the CFF table in the file */
{
CFF_Font* cff;
FT_Memory memory = face->root.memory;
FT_Face root;
FT_UInt flags;
if ( ALLOC( cff, sizeof ( *cff ) ) )
goto Exit;
face->extra.data = cff;
error = CFF_Load_Font( stream, face_index, cff );
if ( error )
goto Exit;
cff->pshinter = pshinter;
/* Complement the root flags with some interesting information. */
/* Note that this is only necessary for pure CFF and CEF fonts. */
root = &face->root;
root->num_glyphs = cff->num_glyphs;
if ( pure_cff )
{
CFF_Font_Dict* dict = &cff->top_font.font_dict;
/* we need the `PSNames' module for pure-CFF and CEF formats */
if ( !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;
}
/* Set up num_faces. */
root->num_faces = cff->num_faces;
/* compute number of glyphs */
if ( dict->cid_registry )
root->num_glyphs = dict->cid_count;
else
root->num_glyphs = cff->charstrings_index.count;
/* set global bbox, as well as EM size */
root->bbox = dict->font_bbox;
root->ascender = (FT_Short)( root->bbox.yMax >> 16 );
root->descender = (FT_Short)( root->bbox.yMin >> 16 );
root->height = (FT_Short)(
( ( root->ascender - root->descender ) * 12 ) / 10 );
if ( dict->units_per_em )
root->units_per_EM = dict->units_per_em;
else
root->units_per_EM = 1000;
/* retrieve font family & style name */
root->family_name = CFF_Get_Name( &cff->name_index, face_index );
if ( dict->cid_registry )
root->style_name = CFF_StrCopy( memory, "Regular" ); /* XXXX */
else
root->style_name = CFF_Get_String( &cff->string_index,
dict->weight,
psnames );
/*******************************************************************/
/* */
/* 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
#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
flags |= FT_FACE_FLAG_GLYPH_NAMES;
#endif
root->face_flags = flags;
/*******************************************************************/
/* */
/* Compute style flags. */
/* */
flags = 0;
if ( dict->italic_angle )
flags |= FT_STYLE_FLAG_ITALIC;
/* XXX: may not be correct */
if ( cff->top_font.private_dict.force_bold )
flags |= FT_STYLE_FLAG_BOLD;
root->style_flags = flags;
/* set the charmaps if any */
if ( sfnt_format )
{
/*****************************************************************/
/* */
/* Polish the charmaps. */
/* */
/* Try to set the charmap encoding according to the platform & */
/* encoding ID of each charmap. */
/* */
TT_CharMap charmap;
FT_Int n;
charmap = face->charmaps;
root->num_charmaps = face->num_charmaps;
/* allocate table of pointers */
if ( ALLOC_ARRAY( root->charmaps, root->num_charmaps, FT_CharMap ) )
goto Exit;
for ( n = 0; n < root->num_charmaps; n++, charmap++ )
{
FT_Int platform = charmap->cmap.platformID;
FT_Int encoding = charmap->cmap.platformEncodingID;
charmap->root.face = (FT_Face)face;
charmap->root.platform_id = (FT_UShort)platform;
charmap->root.encoding_id = (FT_UShort)encoding;
charmap->root.encoding = find_encoding( platform, encoding );
/* now, set root->charmap with a unicode charmap */
/* wherever available */
if ( !root->charmap &&
charmap->root.encoding == ft_encoding_unicode )
root->charmap = (FT_CharMap)charmap;
root->charmaps[n] = (FT_CharMap)charmap;
}
}
}
}
Exit:
return error;
Bad_Format:
error = CFF_Err_Unknown_File_Format;
goto Exit;
}
/*************************************************************************/
/* */
/* <Function> */
/* CFF_Face_Done */
/* */
/* <Description> */
/* Finalizes a given face object. */
/* */
/* <Input> */
/* face :: A pointer to the face object to destroy. */
/* */
FT_LOCAL_DEF void
CFF_Face_Done( CFF_Face face )
{
FT_Memory memory = face->root.memory;
SFNT_Interface* sfnt = (SFNT_Interface*)face->sfnt;
if ( sfnt )
sfnt->done_face( face );
{
CFF_Font* cff = (CFF_Font*)face->extra.data;
if ( cff )
{
CFF_Done_Font( cff );
FREE( face->extra.data );
}
}
}
/*************************************************************************/
/* */
/* <Function> */
/* CFF_Driver_Init */
/* */
/* <Description> */
/* Initializes a given OpenType driver object. */
/* */
/* <Input> */
/* driver :: A handle to the target driver object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF FT_Error
CFF_Driver_Init( CFF_Driver driver )
{
/* init extension registry if needed */
#ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
return TT_Init_Extensions( driver );
#else
FT_UNUSED( driver );
return CFF_Err_Ok;
#endif
}
/*************************************************************************/
/* */
/* <Function> */
/* CFF_Driver_Done */
/* */
/* <Description> */
/* Finalizes a given OpenType driver. */
/* */
/* <Input> */
/* driver :: A handle to the target OpenType driver. */
/* */
FT_LOCAL_DEF void
CFF_Driver_Done( CFF_Driver driver )
{
/* destroy extensions registry if needed */
#ifdef TT_CONFIG_OPTION_EXTEND_ENGINE
TT_Done_Extensions( driver );
#else
FT_UNUSED( driver );
#endif
}
/* END */