ref: ab02d9e8e76030eec774ce058f005864e14b34ea
dir: /src/cff/cffdrivr.c/
/***************************************************************************/
/* */
/* cffdrivr.c */
/* */
/* OpenType font driver implementation (body). */
/* */
/* Copyright 1996-2012 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_SERVICE_CID_H
#include FT_SERVICE_POSTSCRIPT_INFO_H
#include FT_SERVICE_POSTSCRIPT_NAME_H
#include FT_SERVICE_TT_CMAP_H
#include "cffdrivr.h"
#include "cffgload.h"
#include "cffload.h"
#include "cffcmap.h"
#include "cffparse.h"
#include "cfferrs.h"
#include "cffpic.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> */
/* cff_glyph_load */
/* */
/* <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 )
cff_glyph_load( 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;
/* reset the size object if necessary */
if ( load_flags & FT_LOAD_NO_SCALE )
size = NULL;
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;
}
FT_CALLBACK_DEF( FT_Error )
cff_get_advances( FT_Face face,
FT_UInt start,
FT_UInt count,
FT_Int32 flags,
FT_Fixed* advances )
{
FT_UInt nn;
FT_Error error = CFF_Err_Ok;
FT_GlyphSlot slot = face->glyph;
flags |= (FT_UInt32)FT_LOAD_ADVANCE_ONLY;
for ( nn = 0; nn < count; nn++ )
{
error = cff_glyph_load( slot, face->size, start + nn, flags );
if ( error )
break;
advances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT )
? slot->linearVertAdvance
: slot->linearHoriAdvance;
}
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_String* gname;
FT_UShort sid;
FT_Error error;
if ( !font->psnames )
{
FT_ERROR(( "cff_get_glyph_name:"
" cannot get glyph name from CFF & CEF fonts\n"
" "
" without the `PSNames' module\n" ));
error = CFF_Err_Missing_Module;
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, sid );
if ( gname )
FT_STRCPYN( buffer, gname, buffer_max );
error = CFF_Err_Ok;
Exit:
return error;
}
static FT_UInt
cff_get_name_index( CFF_Face face,
FT_String* glyph_name )
{
CFF_Font cff;
CFF_Charset charset;
FT_Service_PsCMaps psnames;
FT_String* name;
FT_UShort sid;
FT_UInt i;
cff = (CFF_FontRec *)face->extra.data;
charset = &cff->charset;
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
if ( !psnames )
return 0;
for ( i = 0; i < cff->num_glyphs; i++ )
{
sid = charset->sids[i];
if ( sid > 390 )
name = cff_index_get_string( cff, sid - 391 );
else
name = (FT_String *)psnames->adobe_std_strings( sid );
if ( !name )
continue;
if ( !ft_strcmp( glyph_name, name ) )
return i;
}
return 0;
}
FT_DEFINE_SERVICE_GLYPHDICTREC(cff_service_glyph_dict,
(FT_GlyphDict_GetNameFunc) cff_get_glyph_name,
(FT_GlyphDict_NameIndexFunc)cff_get_name_index
)
/*
* POSTSCRIPT INFO SERVICE
*
*/
static FT_Int
cff_ps_has_glyph_names( FT_Face face )
{
return ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES ) > 0;
}
static FT_Error
cff_ps_get_font_info( CFF_Face face,
PS_FontInfoRec* afont_info )
{
CFF_Font cff = (CFF_Font)face->extra.data;
FT_Error error = CFF_Err_Ok;
if ( cff && cff->font_info == NULL )
{
CFF_FontRecDict dict = &cff->top_font.font_dict;
PS_FontInfoRec *font_info = NULL;
FT_Memory memory = face->root.memory;
if ( FT_ALLOC( font_info, sizeof ( *font_info ) ) )
goto Fail;
font_info->version = cff_index_get_sid_string( cff,
dict->version );
font_info->notice = cff_index_get_sid_string( cff,
dict->notice );
font_info->full_name = cff_index_get_sid_string( cff,
dict->full_name );
font_info->family_name = cff_index_get_sid_string( cff,
dict->family_name );
font_info->weight = cff_index_get_sid_string( cff,
dict->weight );
font_info->italic_angle = dict->italic_angle;
font_info->is_fixed_pitch = dict->is_fixed_pitch;
font_info->underline_position = (FT_Short)dict->underline_position;
font_info->underline_thickness = (FT_Short)dict->underline_thickness;
cff->font_info = font_info;
}
if ( cff )
*afont_info = *cff->font_info;
Fail:
return error;
}
FT_DEFINE_SERVICE_PSINFOREC(cff_service_ps_info,
(PS_GetFontInfoFunc) cff_ps_get_font_info,
(PS_GetFontExtraFunc) NULL,
(PS_HasGlyphNamesFunc) cff_ps_has_glyph_names,
(PS_GetFontPrivateFunc)NULL, /* unsupported with CFF fonts */
(PS_GetFontValueFunc) NULL /* not implemented */
)
/*
* POSTSCRIPT NAME SERVICE
*
*/
static const char*
cff_get_ps_name( CFF_Face face )
{
CFF_Font cff = (CFF_Font)face->extra.data;
return (const char*)cff->font_name;
}
FT_DEFINE_SERVICE_PSFONTNAMEREC(cff_service_ps_name,
(FT_PsName_GetFunc)cff_get_ps_name
)
/*
* TT CMAP INFO
*
* If the charmap is a synthetic Unicode encoding cmap or
* a Type 1 standard (or expert) encoding cmap, hide TT CMAP INFO
* service defined in SFNT module.
*
* Otherwise call the service function in the sfnt module.
*
*/
static FT_Error
cff_get_cmap_info( FT_CharMap charmap,
TT_CMapInfo *cmap_info )
{
FT_CMap cmap = FT_CMAP( charmap );
FT_Error error = CFF_Err_Ok;
FT_Face face = FT_CMAP_FACE( cmap );
FT_Library library = FT_FACE_LIBRARY( face );
cmap_info->language = 0;
cmap_info->format = 0;
if ( cmap->clazz != &CFF_CMAP_ENCODING_CLASS_REC_GET &&
cmap->clazz != &CFF_CMAP_UNICODE_CLASS_REC_GET )
{
FT_Module sfnt = FT_Get_Module( library, "sfnt" );
FT_Service_TTCMaps service =
(FT_Service_TTCMaps)ft_module_get_service( sfnt,
FT_SERVICE_ID_TT_CMAP );
if ( service && service->get_cmap_info )
error = service->get_cmap_info( charmap, cmap_info );
}
return error;
}
FT_DEFINE_SERVICE_TTCMAPSREC(cff_service_get_cmap_info,
(TT_CMap_Info_GetFunc)cff_get_cmap_info
)
/*
* CID INFO SERVICE
*
*/
static FT_Error
cff_get_ros( CFF_Face face,
const char* *registry,
const char* *ordering,
FT_Int *supplement )
{
FT_Error error = CFF_Err_Ok;
CFF_Font cff = (CFF_Font)face->extra.data;
if ( cff )
{
CFF_FontRecDict dict = &cff->top_font.font_dict;
if ( dict->cid_registry == 0xFFFFU )
{
error = CFF_Err_Invalid_Argument;
goto Fail;
}
if ( registry )
{
if ( cff->registry == NULL )
cff->registry = cff_index_get_sid_string( cff,
dict->cid_registry );
*registry = cff->registry;
}
if ( ordering )
{
if ( cff->ordering == NULL )
cff->ordering = cff_index_get_sid_string( cff,
dict->cid_ordering );
*ordering = cff->ordering;
}
/*
* XXX: According to Adobe TechNote #5176, the supplement in CFF
* can be a real number. We truncate it to fit public API
* since freetype-2.3.6.
*/
if ( supplement )
{
if ( dict->cid_supplement < FT_INT_MIN ||
dict->cid_supplement > FT_INT_MAX )
FT_TRACE1(( "cff_get_ros: too large supplement %d is truncated\n",
dict->cid_supplement ));
*supplement = (FT_Int)dict->cid_supplement;
}
}
Fail:
return error;
}
static FT_Error
cff_get_is_cid( CFF_Face face,
FT_Bool *is_cid )
{
FT_Error error = CFF_Err_Ok;
CFF_Font cff = (CFF_Font)face->extra.data;
*is_cid = 0;
if ( cff )
{
CFF_FontRecDict dict = &cff->top_font.font_dict;
if ( dict->cid_registry != 0xFFFFU )
*is_cid = 1;
}
return error;
}
static FT_Error
cff_get_cid_from_glyph_index( CFF_Face face,
FT_UInt glyph_index,
FT_UInt *cid )
{
FT_Error error = CFF_Err_Ok;
CFF_Font cff;
cff = (CFF_Font)face->extra.data;
if ( cff )
{
FT_UInt c;
CFF_FontRecDict dict = &cff->top_font.font_dict;
if ( dict->cid_registry == 0xFFFFU )
{
error = CFF_Err_Invalid_Argument;
goto Fail;
}
if ( glyph_index > cff->num_glyphs )
{
error = CFF_Err_Invalid_Argument;
goto Fail;
}
c = cff->charset.sids[glyph_index];
if ( cid )
*cid = c;
}
Fail:
return error;
}
FT_DEFINE_SERVICE_CIDREC(cff_service_cid_info,
(FT_CID_GetRegistryOrderingSupplementFunc)cff_get_ros,
(FT_CID_GetIsInternallyCIDKeyedFunc) cff_get_is_cid,
(FT_CID_GetCIDFromGlyphIndexFunc) cff_get_cid_from_glyph_index
)
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** D R I V E R I N T E R F A C E ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
FT_DEFINE_SERVICEDESCREC6(cff_services,
FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF,
FT_SERVICE_ID_POSTSCRIPT_INFO, &CFF_SERVICE_PS_INFO_GET,
FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &CFF_SERVICE_PS_NAME_GET,
FT_SERVICE_ID_GLYPH_DICT, &CFF_SERVICE_GLYPH_DICT_GET,
FT_SERVICE_ID_TT_CMAP, &CFF_SERVICE_GET_CMAP_INFO_GET,
FT_SERVICE_ID_CID, &CFF_SERVICE_CID_INFO_GET
)
#else
FT_DEFINE_SERVICEDESCREC5(cff_services,
FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF,
FT_SERVICE_ID_POSTSCRIPT_INFO, &CFF_SERVICE_PS_INFO_GET,
FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &CFF_SERVICE_PS_NAME_GET,
FT_SERVICE_ID_TT_CMAP, &CFF_SERVICE_GET_CMAP_INFO_GET,
FT_SERVICE_ID_CID, &CFF_SERVICE_CID_INFO_GET
)
#endif
FT_CALLBACK_DEF( FT_Module_Interface )
cff_get_interface( FT_Module driver, /* CFF_Driver */
const char* module_interface )
{
FT_Library library;
FT_Module sfnt;
FT_Module_Interface result;
/* CFF_SERVICES_GET derefers `library' in PIC mode */
#ifdef FT_CONFIG_OPTION_PIC
if ( !driver )
return NULL;
library = driver->library;
if ( !library )
return NULL;
#endif
result = ft_service_list_lookup( CFF_SERVICES_GET, module_interface );
if ( result != NULL )
return result;
/* `driver' is not yet evaluated in non-PIC mode */
#ifndef FT_CONFIG_OPTION_PIC
if ( !driver )
return NULL;
library = driver->library;
if ( !library )
return NULL;
#endif
/* we pass our request to the `sfnt' module */
sfnt = FT_Get_Module( library, "sfnt" );
return sfnt ? sfnt->clazz->get_interface( sfnt, module_interface ) : 0;
}
/* The FT_DriverInterface structure is defined in ftdriver.h. */
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
#define CFF_SIZE_SELECT cff_size_select
#else
#define CFF_SIZE_SELECT 0
#endif
FT_DEFINE_DRIVER( cff_driver_class,
FT_MODULE_FONT_DRIVER |
FT_MODULE_DRIVER_SCALABLE |
FT_MODULE_DRIVER_HAS_HINTER,
sizeof ( CFF_DriverRec ),
"cff",
0x10000L,
0x20000L,
0, /* module-specific interface */
cff_driver_init,
cff_driver_done,
cff_get_interface,
/* now the specific driver fields */
sizeof ( TT_FaceRec ),
sizeof ( CFF_SizeRec ),
sizeof ( CFF_GlyphSlotRec ),
cff_face_init,
cff_face_done,
cff_size_init,
cff_size_done,
cff_slot_init,
cff_slot_done,
ft_stub_set_char_sizes, /* FT_CONFIG_OPTION_OLD_INTERNALS */
ft_stub_set_pixel_sizes, /* FT_CONFIG_OPTION_OLD_INTERNALS */
cff_glyph_load,
cff_get_kerning,
0, /* FT_Face_AttachFunc */
cff_get_advances,
cff_size_request,
CFF_SIZE_SELECT
)
/* END */