/***************************************************************************/ | |
/* */ | |
/* t42objs.c */ | |
/* */ | |
/* Type 42 objects manager (body). */ | |
/* */ | |
/* Copyright 2002-2015 by */ | |
/* Roberto Alameda. */ | |
/* */ | |
/* 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 "t42objs.h" | |
#include "t42parse.h" | |
#include "t42error.h" | |
#include FT_INTERNAL_DEBUG_H | |
#include FT_LIST_H | |
#include FT_TRUETYPE_IDS_H | |
#undef FT_COMPONENT | |
#define FT_COMPONENT trace_t42 | |
static FT_Error | |
T42_Open_Face( T42_Face face ) | |
{ | |
T42_LoaderRec loader; | |
T42_Parser parser; | |
T1_Font type1 = &face->type1; | |
FT_Memory memory = face->root.memory; | |
FT_Error error; | |
PSAux_Service psaux = (PSAux_Service)face->psaux; | |
t42_loader_init( &loader, face ); | |
parser = &loader.parser; | |
if ( FT_ALLOC( face->ttf_data, 12 ) ) | |
goto Exit; | |
/* while parsing the font we always update `face->ttf_size' so that */ | |
/* even in case of buggy data (which might lead to premature end of */ | |
/* scanning without causing an error) the call to `FT_Open_Face' in */ | |
/* `T42_Face_Init' passes the correct size */ | |
face->ttf_size = 12; | |
error = t42_parser_init( parser, | |
face->root.stream, | |
memory, | |
psaux); | |
if ( error ) | |
goto Exit; | |
error = t42_parse_dict( face, &loader, | |
parser->base_dict, parser->base_len ); | |
if ( error ) | |
goto Exit; | |
if ( type1->font_type != 42 ) | |
{ | |
FT_ERROR(( "T42_Open_Face: cannot handle FontType %d\n", | |
type1->font_type )); | |
error = FT_THROW( Unknown_File_Format ); | |
goto Exit; | |
} | |
/* now, propagate the charstrings and glyphnames tables */ | |
/* to the Type1 data */ | |
type1->num_glyphs = loader.num_glyphs; | |
if ( !loader.charstrings.init ) | |
{ | |
FT_ERROR(( "T42_Open_Face: no charstrings array in face\n" )); | |
error = FT_THROW( Invalid_File_Format ); | |
} | |
loader.charstrings.init = 0; | |
type1->charstrings_block = loader.charstrings.block; | |
type1->charstrings = loader.charstrings.elements; | |
type1->charstrings_len = loader.charstrings.lengths; | |
/* we copy the glyph names `block' and `elements' fields; */ | |
/* the `lengths' field must be released later */ | |
type1->glyph_names_block = loader.glyph_names.block; | |
type1->glyph_names = (FT_String**)loader.glyph_names.elements; | |
loader.glyph_names.block = NULL; | |
loader.glyph_names.elements = NULL; | |
/* we must now build type1.encoding when we have a custom array */ | |
if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY ) | |
{ | |
FT_Int charcode, idx, min_char, max_char; | |
FT_Byte* glyph_name; | |
/* OK, we do the following: for each element in the encoding */ | |
/* table, look up the index of the glyph having the same name */ | |
/* as defined in the CharStrings array. */ | |
/* The index is then stored in type1.encoding.char_index, and */ | |
/* the name in type1.encoding.char_name */ | |
min_char = 0; | |
max_char = 0; | |
charcode = 0; | |
for ( ; charcode < loader.encoding_table.max_elems; charcode++ ) | |
{ | |
FT_Byte* char_name; | |
type1->encoding.char_index[charcode] = 0; | |
type1->encoding.char_name [charcode] = (char *)".notdef"; | |
char_name = loader.encoding_table.elements[charcode]; | |
if ( char_name ) | |
for ( idx = 0; idx < type1->num_glyphs; idx++ ) | |
{ | |
glyph_name = (FT_Byte*)type1->glyph_names[idx]; | |
if ( ft_strcmp( (const char*)char_name, | |
(const char*)glyph_name ) == 0 ) | |
{ | |
type1->encoding.char_index[charcode] = (FT_UShort)idx; | |
type1->encoding.char_name [charcode] = (char*)glyph_name; | |
/* Change min/max encoded char only if glyph name is */ | |
/* not /.notdef */ | |
if ( ft_strcmp( (const char*)".notdef", | |
(const char*)glyph_name ) != 0 ) | |
{ | |
if ( charcode < min_char ) | |
min_char = charcode; | |
if ( charcode >= max_char ) | |
max_char = charcode + 1; | |
} | |
break; | |
} | |
} | |
} | |
type1->encoding.code_first = min_char; | |
type1->encoding.code_last = max_char; | |
type1->encoding.num_chars = loader.num_chars; | |
} | |
Exit: | |
t42_loader_done( &loader ); | |
return error; | |
} | |
/***************** Driver Functions *************/ | |
FT_LOCAL_DEF( FT_Error ) | |
T42_Face_Init( FT_Stream stream, | |
FT_Face t42face, /* T42_Face */ | |
FT_Int face_index, | |
FT_Int num_params, | |
FT_Parameter* params ) | |
{ | |
T42_Face face = (T42_Face)t42face; | |
FT_Error error; | |
FT_Service_PsCMaps psnames; | |
PSAux_Service psaux; | |
FT_Face root = (FT_Face)&face->root; | |
T1_Font type1 = &face->type1; | |
PS_FontInfo info = &type1->font_info; | |
FT_UNUSED( num_params ); | |
FT_UNUSED( params ); | |
FT_UNUSED( stream ); | |
face->ttf_face = NULL; | |
face->root.num_faces = 1; | |
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); | |
face->psnames = psnames; | |
face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ), | |
"psaux" ); | |
psaux = (PSAux_Service)face->psaux; | |
if ( !psaux ) | |
{ | |
FT_ERROR(( "T42_Face_Init: cannot access `psaux' module\n" )); | |
error = FT_THROW( Missing_Module ); | |
goto Exit; | |
} | |
FT_TRACE2(( "Type 42 driver\n" )); | |
/* open the tokenizer, this will also check the font format */ | |
error = T42_Open_Face( face ); | |
if ( error ) | |
goto Exit; | |
/* if we just wanted to check the format, leave successfully now */ | |
if ( face_index < 0 ) | |
goto Exit; | |
/* check the face index */ | |
if ( ( face_index & 0xFFFF ) > 0 ) | |
{ | |
FT_ERROR(( "T42_Face_Init: invalid face index\n" )); | |
error = FT_THROW( Invalid_Argument ); | |
goto Exit; | |
} | |
/* Now load the font program into the face object */ | |
/* Init the face object fields */ | |
/* Now set up root face fields */ | |
root->num_glyphs = type1->num_glyphs; | |
root->num_charmaps = 0; | |
root->face_index = 0; | |
root->face_flags |= FT_FACE_FLAG_SCALABLE | | |
FT_FACE_FLAG_HORIZONTAL | | |
FT_FACE_FLAG_GLYPH_NAMES; | |
if ( info->is_fixed_pitch ) | |
root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; | |
/* We only set this flag if we have the patented bytecode interpreter. */ | |
/* There are no known `tricky' Type42 fonts that could be loaded with */ | |
/* the unpatented interpreter. */ | |
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER | |
root->face_flags |= FT_FACE_FLAG_HINTER; | |
#endif | |
/* XXX: TODO -- add kerning with .afm support */ | |
/* get style name -- be careful, some broken fonts only */ | |
/* have a `/FontName' dictionary entry! */ | |
root->family_name = info->family_name; | |
/* assume "Regular" style if we don't know better */ | |
root->style_name = (char *)"Regular"; | |
if ( root->family_name ) | |
{ | |
char* full = info->full_name; | |
char* family = root->family_name; | |
if ( full ) | |
{ | |
while ( *full ) | |
{ | |
if ( *full == *family ) | |
{ | |
family++; | |
full++; | |
} | |
else | |
{ | |
if ( *full == ' ' || *full == '-' ) | |
full++; | |
else if ( *family == ' ' || *family == '-' ) | |
family++; | |
else | |
{ | |
if ( !*family ) | |
root->style_name = full; | |
break; | |
} | |
} | |
} | |
} | |
} | |
else | |
{ | |
/* do we have a `/FontName'? */ | |
if ( type1->font_name ) | |
root->family_name = type1->font_name; | |
} | |
/* no embedded bitmap support */ | |
root->num_fixed_sizes = 0; | |
root->available_sizes = NULL; | |
/* Load the TTF font embedded in the T42 font */ | |
{ | |
FT_Open_Args args; | |
args.flags = FT_OPEN_MEMORY | FT_OPEN_DRIVER; | |
args.driver = FT_Get_Module( FT_FACE_LIBRARY( face ), | |
"truetype" ); | |
args.memory_base = face->ttf_data; | |
args.memory_size = face->ttf_size; | |
if ( num_params ) | |
{ | |
args.flags |= FT_OPEN_PARAMS; | |
args.num_params = num_params; | |
args.params = params; | |
} | |
error = FT_Open_Face( FT_FACE_LIBRARY( face ), | |
&args, 0, &face->ttf_face ); | |
} | |
if ( error ) | |
goto Exit; | |
FT_Done_Size( face->ttf_face->size ); | |
/* Ignore info in FontInfo dictionary and use the info from the */ | |
/* loaded TTF font. The PostScript interpreter also ignores it. */ | |
root->bbox = face->ttf_face->bbox; | |
root->units_per_EM = face->ttf_face->units_per_EM; | |
root->ascender = face->ttf_face->ascender; | |
root->descender = face->ttf_face->descender; | |
root->height = face->ttf_face->height; | |
root->max_advance_width = face->ttf_face->max_advance_width; | |
root->max_advance_height = face->ttf_face->max_advance_height; | |
root->underline_position = (FT_Short)info->underline_position; | |
root->underline_thickness = (FT_Short)info->underline_thickness; | |
/* compute style flags */ | |
root->style_flags = 0; | |
if ( info->italic_angle ) | |
root->style_flags |= FT_STYLE_FLAG_ITALIC; | |
if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD ) | |
root->style_flags |= FT_STYLE_FLAG_BOLD; | |
if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL ) | |
root->face_flags |= FT_FACE_FLAG_VERTICAL; | |
{ | |
if ( psnames ) | |
{ | |
FT_CharMapRec charmap; | |
T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes; | |
FT_CMap_Class clazz; | |
charmap.face = root; | |
/* first of all, try to synthesize a Unicode charmap */ | |
charmap.platform_id = TT_PLATFORM_MICROSOFT; | |
charmap.encoding_id = TT_MS_ID_UNICODE_CS; | |
charmap.encoding = FT_ENCODING_UNICODE; | |
error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL ); | |
if ( error && | |
FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) ) | |
goto Exit; | |
error = FT_Err_Ok; | |
/* now, generate an Adobe Standard encoding when appropriate */ | |
charmap.platform_id = TT_PLATFORM_ADOBE; | |
clazz = NULL; | |
switch ( type1->encoding_type ) | |
{ | |
case T1_ENCODING_TYPE_STANDARD: | |
charmap.encoding = FT_ENCODING_ADOBE_STANDARD; | |
charmap.encoding_id = TT_ADOBE_ID_STANDARD; | |
clazz = cmap_classes->standard; | |
break; | |
case T1_ENCODING_TYPE_EXPERT: | |
charmap.encoding = FT_ENCODING_ADOBE_EXPERT; | |
charmap.encoding_id = TT_ADOBE_ID_EXPERT; | |
clazz = cmap_classes->expert; | |
break; | |
case T1_ENCODING_TYPE_ARRAY: | |
charmap.encoding = FT_ENCODING_ADOBE_CUSTOM; | |
charmap.encoding_id = TT_ADOBE_ID_CUSTOM; | |
clazz = cmap_classes->custom; | |
break; | |
case T1_ENCODING_TYPE_ISOLATIN1: | |
charmap.encoding = FT_ENCODING_ADOBE_LATIN_1; | |
charmap.encoding_id = TT_ADOBE_ID_LATIN_1; | |
clazz = cmap_classes->unicode; | |
break; | |
default: | |
; | |
} | |
if ( clazz ) | |
error = FT_CMap_New( clazz, NULL, &charmap, NULL ); | |
#if 0 | |
/* Select default charmap */ | |
if ( root->num_charmaps ) | |
root->charmap = root->charmaps[0]; | |
#endif | |
} | |
} | |
Exit: | |
return error; | |
} | |
FT_LOCAL_DEF( void ) | |
T42_Face_Done( FT_Face t42face ) | |
{ | |
T42_Face face = (T42_Face)t42face; | |
T1_Font type1; | |
PS_FontInfo info; | |
FT_Memory memory; | |
if ( !face ) | |
return; | |
type1 = &face->type1; | |
info = &type1->font_info; | |
memory = face->root.memory; | |
/* delete internal ttf face prior to freeing face->ttf_data */ | |
if ( face->ttf_face ) | |
FT_Done_Face( face->ttf_face ); | |
/* release font info strings */ | |
FT_FREE( info->version ); | |
FT_FREE( info->notice ); | |
FT_FREE( info->full_name ); | |
FT_FREE( info->family_name ); | |
FT_FREE( info->weight ); | |
/* release top dictionary */ | |
FT_FREE( type1->charstrings_len ); | |
FT_FREE( type1->charstrings ); | |
FT_FREE( type1->glyph_names ); | |
FT_FREE( type1->charstrings_block ); | |
FT_FREE( type1->glyph_names_block ); | |
FT_FREE( type1->encoding.char_index ); | |
FT_FREE( type1->encoding.char_name ); | |
FT_FREE( type1->font_name ); | |
FT_FREE( face->ttf_data ); | |
#if 0 | |
/* release afm data if present */ | |
if ( face->afm_data ) | |
T1_Done_AFM( memory, (T1_AFM*)face->afm_data ); | |
#endif | |
/* release unicode map, if any */ | |
FT_FREE( face->unicode_map.maps ); | |
face->unicode_map.num_maps = 0; | |
face->root.family_name = NULL; | |
face->root.style_name = NULL; | |
} | |
/*************************************************************************/ | |
/* */ | |
/* <Function> */ | |
/* T42_Driver_Init */ | |
/* */ | |
/* <Description> */ | |
/* Initializes a given Type 42 driver object. */ | |
/* */ | |
/* <Input> */ | |
/* driver :: A handle to the target driver object. */ | |
/* */ | |
/* <Return> */ | |
/* FreeType error code. 0 means success. */ | |
/* */ | |
FT_LOCAL_DEF( FT_Error ) | |
T42_Driver_Init( FT_Module module ) /* T42_Driver */ | |
{ | |
T42_Driver driver = (T42_Driver)module; | |
FT_Module ttmodule; | |
ttmodule = FT_Get_Module( module->library, "truetype" ); | |
if ( !ttmodule ) | |
{ | |
FT_ERROR(( "T42_Driver_Init: cannot access `truetype' module\n" )); | |
return FT_THROW( Missing_Module ); | |
} | |
driver->ttclazz = (FT_Driver_Class)ttmodule->clazz; | |
return FT_Err_Ok; | |
} | |
FT_LOCAL_DEF( void ) | |
T42_Driver_Done( FT_Module module ) | |
{ | |
FT_UNUSED( module ); | |
} | |
FT_LOCAL_DEF( FT_Error ) | |
T42_Size_Init( FT_Size size ) /* T42_Size */ | |
{ | |
T42_Size t42size = (T42_Size)size; | |
FT_Face face = size->face; | |
T42_Face t42face = (T42_Face)face; | |
FT_Size ttsize; | |
FT_Error error; | |
error = FT_New_Size( t42face->ttf_face, &ttsize ); | |
t42size->ttsize = ttsize; | |
FT_Activate_Size( ttsize ); | |
return error; | |
} | |
FT_LOCAL_DEF( FT_Error ) | |
T42_Size_Request( FT_Size t42size, /* T42_Size */ | |
FT_Size_Request req ) | |
{ | |
T42_Size size = (T42_Size)t42size; | |
T42_Face face = (T42_Face)t42size->face; | |
FT_Error error; | |
FT_Activate_Size( size->ttsize ); | |
error = FT_Request_Size( face->ttf_face, req ); | |
if ( !error ) | |
t42size->metrics = face->ttf_face->size->metrics; | |
return error; | |
} | |
FT_LOCAL_DEF( FT_Error ) | |
T42_Size_Select( FT_Size t42size, /* T42_Size */ | |
FT_ULong strike_index ) | |
{ | |
T42_Size size = (T42_Size)t42size; | |
T42_Face face = (T42_Face)t42size->face; | |
FT_Error error; | |
FT_Activate_Size( size->ttsize ); | |
error = FT_Select_Size( face->ttf_face, (FT_Int)strike_index ); | |
if ( !error ) | |
t42size->metrics = face->ttf_face->size->metrics; | |
return error; | |
} | |
FT_LOCAL_DEF( void ) | |
T42_Size_Done( FT_Size t42size ) /* T42_Size */ | |
{ | |
T42_Size size = (T42_Size)t42size; | |
FT_Face face = t42size->face; | |
T42_Face t42face = (T42_Face)face; | |
FT_ListNode node; | |
node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize ); | |
if ( node ) | |
{ | |
FT_Done_Size( size->ttsize ); | |
size->ttsize = NULL; | |
} | |
} | |
FT_LOCAL_DEF( FT_Error ) | |
T42_GlyphSlot_Init( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */ | |
{ | |
T42_GlyphSlot slot = (T42_GlyphSlot)t42slot; | |
FT_Face face = t42slot->face; | |
T42_Face t42face = (T42_Face)face; | |
FT_GlyphSlot ttslot; | |
FT_Error error = FT_Err_Ok; | |
if ( face->glyph == NULL ) | |
{ | |
/* First glyph slot for this face */ | |
slot->ttslot = t42face->ttf_face->glyph; | |
} | |
else | |
{ | |
error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot ); | |
slot->ttslot = ttslot; | |
} | |
return error; | |
} | |
FT_LOCAL_DEF( void ) | |
T42_GlyphSlot_Done( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */ | |
{ | |
T42_GlyphSlot slot = (T42_GlyphSlot)t42slot; | |
FT_Done_GlyphSlot( slot->ttslot ); | |
} | |
static void | |
t42_glyphslot_clear( FT_GlyphSlot slot ) | |
{ | |
/* free bitmap if needed */ | |
ft_glyphslot_free_bitmap( slot ); | |
/* clear all public fields in the glyph slot */ | |
FT_ZERO( &slot->metrics ); | |
FT_ZERO( &slot->outline ); | |
FT_ZERO( &slot->bitmap ); | |
slot->bitmap_left = 0; | |
slot->bitmap_top = 0; | |
slot->num_subglyphs = 0; | |
slot->subglyphs = NULL; | |
slot->control_data = NULL; | |
slot->control_len = 0; | |
slot->other = NULL; | |
slot->format = FT_GLYPH_FORMAT_NONE; | |
slot->linearHoriAdvance = 0; | |
slot->linearVertAdvance = 0; | |
} | |
FT_LOCAL_DEF( FT_Error ) | |
T42_GlyphSlot_Load( FT_GlyphSlot glyph, | |
FT_Size size, | |
FT_UInt glyph_index, | |
FT_Int32 load_flags ) | |
{ | |
FT_Error error; | |
T42_GlyphSlot t42slot = (T42_GlyphSlot)glyph; | |
T42_Size t42size = (T42_Size)size; | |
T42_Face t42face = (T42_Face)size->face; | |
FT_Driver_Class ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz; | |
FT_TRACE1(( "T42_GlyphSlot_Load: glyph index %d\n", glyph_index )); | |
/* map T42 glyph index to embedded TTF's glyph index */ | |
glyph_index = (FT_UInt)ft_atol( | |
(const char *)t42face->type1.charstrings[glyph_index] ); | |
t42_glyphslot_clear( t42slot->ttslot ); | |
error = ttclazz->load_glyph( t42slot->ttslot, | |
t42size->ttsize, | |
glyph_index, | |
load_flags | FT_LOAD_NO_BITMAP ); | |
if ( !error ) | |
{ | |
glyph->metrics = t42slot->ttslot->metrics; | |
glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance; | |
glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance; | |
glyph->format = t42slot->ttslot->format; | |
glyph->outline = t42slot->ttslot->outline; | |
glyph->bitmap = t42slot->ttslot->bitmap; | |
glyph->bitmap_left = t42slot->ttslot->bitmap_left; | |
glyph->bitmap_top = t42slot->ttslot->bitmap_top; | |
glyph->num_subglyphs = t42slot->ttslot->num_subglyphs; | |
glyph->subglyphs = t42slot->ttslot->subglyphs; | |
glyph->control_data = t42slot->ttslot->control_data; | |
glyph->control_len = t42slot->ttslot->control_len; | |
} | |
return error; | |
} | |
/* END */ |