0,0 → 1,690 |
/***************************************************************************/ |
/* */ |
/* cidload.c */ |
/* */ |
/* CID-keyed Type1 font loader (body). */ |
/* */ |
/* Copyright 1996-2006, 2009, 2011-2013 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. */ |
/* */ |
/***************************************************************************/ |
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#include <ft2build.h> |
#include FT_INTERNAL_DEBUG_H |
#include FT_CONFIG_CONFIG_H |
#include FT_MULTIPLE_MASTERS_H |
#include FT_INTERNAL_TYPE1_TYPES_H |
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#include "cidload.h" |
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#include "ciderrs.h" |
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/*************************************************************************/ |
/* */ |
/* 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_cidload |
|
|
/* read a single offset */ |
FT_LOCAL_DEF( FT_Long ) |
cid_get_offset( FT_Byte* *start, |
FT_Byte offsize ) |
{ |
FT_ULong result; |
FT_Byte* p = *start; |
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|
for ( result = 0; offsize > 0; offsize-- ) |
{ |
result <<= 8; |
result |= *p++; |
} |
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*start = p; |
return (FT_Long)result; |
} |
|
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/*************************************************************************/ |
/*************************************************************************/ |
/***** *****/ |
/***** TYPE 1 SYMBOL PARSING *****/ |
/***** *****/ |
/*************************************************************************/ |
/*************************************************************************/ |
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static FT_Error |
cid_load_keyword( CID_Face face, |
CID_Loader* loader, |
const T1_Field keyword ) |
{ |
FT_Error error; |
CID_Parser* parser = &loader->parser; |
FT_Byte* object; |
void* dummy_object; |
CID_FaceInfo cid = &face->cid; |
|
|
/* if the keyword has a dedicated callback, call it */ |
if ( keyword->type == T1_FIELD_TYPE_CALLBACK ) |
{ |
keyword->reader( (FT_Face)face, parser ); |
error = parser->root.error; |
goto Exit; |
} |
|
/* we must now compute the address of our target object */ |
switch ( keyword->location ) |
{ |
case T1_FIELD_LOCATION_CID_INFO: |
object = (FT_Byte*)cid; |
break; |
|
case T1_FIELD_LOCATION_FONT_INFO: |
object = (FT_Byte*)&cid->font_info; |
break; |
|
case T1_FIELD_LOCATION_FONT_EXTRA: |
object = (FT_Byte*)&face->font_extra; |
break; |
|
case T1_FIELD_LOCATION_BBOX: |
object = (FT_Byte*)&cid->font_bbox; |
break; |
|
default: |
{ |
CID_FaceDict dict; |
|
|
if ( parser->num_dict < 0 || parser->num_dict >= cid->num_dicts ) |
{ |
FT_ERROR(( "cid_load_keyword: invalid use of `%s'\n", |
keyword->ident )); |
error = FT_THROW( Syntax_Error ); |
goto Exit; |
} |
|
dict = cid->font_dicts + parser->num_dict; |
switch ( keyword->location ) |
{ |
case T1_FIELD_LOCATION_PRIVATE: |
object = (FT_Byte*)&dict->private_dict; |
break; |
|
default: |
object = (FT_Byte*)dict; |
} |
} |
} |
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dummy_object = object; |
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/* now, load the keyword data in the object's field(s) */ |
if ( keyword->type == T1_FIELD_TYPE_INTEGER_ARRAY || |
keyword->type == T1_FIELD_TYPE_FIXED_ARRAY ) |
error = cid_parser_load_field_table( &loader->parser, keyword, |
&dummy_object ); |
else |
error = cid_parser_load_field( &loader->parser, |
keyword, &dummy_object ); |
Exit: |
return error; |
} |
|
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FT_CALLBACK_DEF( FT_Error ) |
cid_parse_font_matrix( CID_Face face, |
CID_Parser* parser ) |
{ |
FT_Matrix* matrix; |
FT_Vector* offset; |
CID_FaceDict dict; |
FT_Face root = (FT_Face)&face->root; |
FT_Fixed temp[6]; |
FT_Fixed temp_scale; |
|
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if ( parser->num_dict >= 0 && parser->num_dict < face->cid.num_dicts ) |
{ |
dict = face->cid.font_dicts + parser->num_dict; |
matrix = &dict->font_matrix; |
offset = &dict->font_offset; |
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(void)cid_parser_to_fixed_array( parser, 6, temp, 3 ); |
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temp_scale = FT_ABS( temp[3] ); |
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/* Set Units per EM based on FontMatrix values. We set the value to */ |
/* 1000 / temp_scale, because temp_scale was already multiplied by */ |
/* 1000 (in t1_tofixed, from psobjs.c). */ |
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root->units_per_EM = (FT_UShort)FT_DivFix( 1000, temp_scale ); |
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/* we need to scale the values by 1.0/temp[3] */ |
if ( temp_scale != 0x10000L ) |
{ |
temp[0] = FT_DivFix( temp[0], temp_scale ); |
temp[1] = FT_DivFix( temp[1], temp_scale ); |
temp[2] = FT_DivFix( temp[2], temp_scale ); |
temp[4] = FT_DivFix( temp[4], temp_scale ); |
temp[5] = FT_DivFix( temp[5], temp_scale ); |
temp[3] = 0x10000L; |
} |
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matrix->xx = temp[0]; |
matrix->yx = temp[1]; |
matrix->xy = temp[2]; |
matrix->yy = temp[3]; |
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/* note that the font offsets are expressed in integer font units */ |
offset->x = temp[4] >> 16; |
offset->y = temp[5] >> 16; |
} |
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return FT_Err_Ok; /* this is a callback function; */ |
/* we must return an error code */ |
} |
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FT_CALLBACK_DEF( FT_Error ) |
parse_fd_array( CID_Face face, |
CID_Parser* parser ) |
{ |
CID_FaceInfo cid = &face->cid; |
FT_Memory memory = face->root.memory; |
FT_Error error = FT_Err_Ok; |
FT_Long num_dicts; |
|
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num_dicts = cid_parser_to_int( parser ); |
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if ( !cid->font_dicts ) |
{ |
FT_Int n; |
|
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if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) ) |
goto Exit; |
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cid->num_dicts = (FT_UInt)num_dicts; |
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/* don't forget to set a few defaults */ |
for ( n = 0; n < cid->num_dicts; n++ ) |
{ |
CID_FaceDict dict = cid->font_dicts + n; |
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/* default value for lenIV */ |
dict->private_dict.lenIV = 4; |
} |
} |
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Exit: |
return error; |
} |
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/* by mistake, `expansion_factor' appears both in PS_PrivateRec */ |
/* and CID_FaceDictRec (both are public header files and can't */ |
/* changed); we simply copy the value */ |
|
FT_CALLBACK_DEF( FT_Error ) |
parse_expansion_factor( CID_Face face, |
CID_Parser* parser ) |
{ |
CID_FaceDict dict; |
|
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if ( parser->num_dict >= 0 && parser->num_dict < face->cid.num_dicts ) |
{ |
dict = face->cid.font_dicts + parser->num_dict; |
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dict->expansion_factor = cid_parser_to_fixed( parser, 0 ); |
dict->private_dict.expansion_factor = dict->expansion_factor; |
} |
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return FT_Err_Ok; |
} |
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static |
const T1_FieldRec cid_field_records[] = |
{ |
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#include "cidtoken.h" |
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T1_FIELD_CALLBACK( "FDArray", parse_fd_array, 0 ) |
T1_FIELD_CALLBACK( "FontMatrix", cid_parse_font_matrix, 0 ) |
T1_FIELD_CALLBACK( "ExpansionFactor", parse_expansion_factor, 0 ) |
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{ 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 } |
}; |
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static FT_Error |
cid_parse_dict( CID_Face face, |
CID_Loader* loader, |
FT_Byte* base, |
FT_Long size ) |
{ |
CID_Parser* parser = &loader->parser; |
|
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parser->root.cursor = base; |
parser->root.limit = base + size; |
parser->root.error = FT_Err_Ok; |
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{ |
FT_Byte* cur = base; |
FT_Byte* limit = cur + size; |
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for (;;) |
{ |
FT_Byte* newlimit; |
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parser->root.cursor = cur; |
cid_parser_skip_spaces( parser ); |
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if ( parser->root.cursor >= limit ) |
newlimit = limit - 1 - 17; |
else |
newlimit = parser->root.cursor - 17; |
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/* look for `%ADOBeginFontDict' */ |
for ( ; cur < newlimit; cur++ ) |
{ |
if ( *cur == '%' && |
ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 ) |
{ |
/* if /FDArray was found, then cid->num_dicts is > 0, and */ |
/* we can start increasing parser->num_dict */ |
if ( face->cid.num_dicts > 0 ) |
parser->num_dict++; |
} |
} |
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cur = parser->root.cursor; |
/* no error can occur in cid_parser_skip_spaces */ |
if ( cur >= limit ) |
break; |
|
cid_parser_skip_PS_token( parser ); |
if ( parser->root.cursor >= limit || parser->root.error ) |
break; |
|
/* look for immediates */ |
if ( *cur == '/' && cur + 2 < limit ) |
{ |
FT_PtrDist len; |
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cur++; |
len = parser->root.cursor - cur; |
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if ( len > 0 && len < 22 ) |
{ |
/* now compare the immediate name to the keyword table */ |
T1_Field keyword = (T1_Field)cid_field_records; |
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for (;;) |
{ |
FT_Byte* name; |
|
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name = (FT_Byte*)keyword->ident; |
if ( !name ) |
break; |
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if ( cur[0] == name[0] && |
len == (FT_PtrDist)ft_strlen( (const char*)name ) ) |
{ |
FT_PtrDist n; |
|
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for ( n = 1; n < len; n++ ) |
if ( cur[n] != name[n] ) |
break; |
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if ( n >= len ) |
{ |
/* we found it - run the parsing callback */ |
parser->root.error = cid_load_keyword( face, |
loader, |
keyword ); |
if ( parser->root.error ) |
return parser->root.error; |
break; |
} |
} |
keyword++; |
} |
} |
} |
|
cur = parser->root.cursor; |
} |
} |
return parser->root.error; |
} |
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/* read the subrmap and the subrs of each font dict */ |
static FT_Error |
cid_read_subrs( CID_Face face ) |
{ |
CID_FaceInfo cid = &face->cid; |
FT_Memory memory = face->root.memory; |
FT_Stream stream = face->cid_stream; |
FT_Error error; |
FT_Int n; |
CID_Subrs subr; |
FT_UInt max_offsets = 0; |
FT_ULong* offsets = 0; |
PSAux_Service psaux = (PSAux_Service)face->psaux; |
|
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if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) ) |
goto Exit; |
|
subr = face->subrs; |
for ( n = 0; n < cid->num_dicts; n++, subr++ ) |
{ |
CID_FaceDict dict = cid->font_dicts + n; |
FT_Int lenIV = dict->private_dict.lenIV; |
FT_UInt count, num_subrs = dict->num_subrs; |
FT_ULong data_len; |
FT_Byte* p; |
|
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/* Check for possible overflow. */ |
if ( num_subrs == FT_UINT_MAX ) |
{ |
error = FT_THROW( Syntax_Error ); |
goto Fail; |
} |
|
/* reallocate offsets array if needed */ |
if ( num_subrs + 1 > max_offsets ) |
{ |
FT_UInt new_max = FT_PAD_CEIL( num_subrs + 1, 4 ); |
|
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if ( new_max <= max_offsets ) |
{ |
error = FT_THROW( Syntax_Error ); |
goto Fail; |
} |
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if ( FT_RENEW_ARRAY( offsets, max_offsets, new_max ) ) |
goto Fail; |
|
max_offsets = new_max; |
} |
|
/* read the subrmap's offsets */ |
if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) || |
FT_FRAME_ENTER( ( num_subrs + 1 ) * dict->sd_bytes ) ) |
goto Fail; |
|
p = (FT_Byte*)stream->cursor; |
for ( count = 0; count <= num_subrs; count++ ) |
offsets[count] = cid_get_offset( &p, (FT_Byte)dict->sd_bytes ); |
|
FT_FRAME_EXIT(); |
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/* offsets must be ordered */ |
for ( count = 1; count <= num_subrs; count++ ) |
if ( offsets[count - 1] > offsets[count] ) |
goto Fail; |
|
/* now, compute the size of subrs charstrings, */ |
/* allocate, and read them */ |
data_len = offsets[num_subrs] - offsets[0]; |
|
if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) || |
FT_ALLOC( subr->code[0], data_len ) ) |
goto Fail; |
|
if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) || |
FT_STREAM_READ( subr->code[0], data_len ) ) |
goto Fail; |
|
/* set up pointers */ |
for ( count = 1; count <= num_subrs; count++ ) |
{ |
FT_ULong len; |
|
|
len = offsets[count] - offsets[count - 1]; |
subr->code[count] = subr->code[count - 1] + len; |
} |
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/* decrypt subroutines, but only if lenIV >= 0 */ |
if ( lenIV >= 0 ) |
{ |
for ( count = 0; count < num_subrs; count++ ) |
{ |
FT_ULong len; |
|
|
len = offsets[count + 1] - offsets[count]; |
psaux->t1_decrypt( subr->code[count], len, 4330 ); |
} |
} |
|
subr->num_subrs = num_subrs; |
} |
|
Exit: |
FT_FREE( offsets ); |
return error; |
|
Fail: |
if ( face->subrs ) |
{ |
for ( n = 0; n < cid->num_dicts; n++ ) |
{ |
if ( face->subrs[n].code ) |
FT_FREE( face->subrs[n].code[0] ); |
|
FT_FREE( face->subrs[n].code ); |
} |
FT_FREE( face->subrs ); |
} |
goto Exit; |
} |
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static void |
cid_init_loader( CID_Loader* loader, |
CID_Face face ) |
{ |
FT_UNUSED( face ); |
|
FT_MEM_ZERO( loader, sizeof ( *loader ) ); |
} |
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static void |
cid_done_loader( CID_Loader* loader ) |
{ |
CID_Parser* parser = &loader->parser; |
|
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/* finalize parser */ |
cid_parser_done( parser ); |
} |
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static FT_Error |
cid_hex_to_binary( FT_Byte* data, |
FT_Long data_len, |
FT_ULong offset, |
CID_Face face ) |
{ |
FT_Stream stream = face->root.stream; |
FT_Error error; |
|
FT_Byte buffer[256]; |
FT_Byte *p, *plimit; |
FT_Byte *d, *dlimit; |
FT_Byte val; |
|
FT_Bool upper_nibble, done; |
|
|
if ( FT_STREAM_SEEK( offset ) ) |
goto Exit; |
|
d = data; |
dlimit = d + data_len; |
p = buffer; |
plimit = p; |
|
upper_nibble = 1; |
done = 0; |
|
while ( d < dlimit ) |
{ |
if ( p >= plimit ) |
{ |
FT_ULong oldpos = FT_STREAM_POS(); |
FT_ULong size = stream->size - oldpos; |
|
|
if ( size == 0 ) |
{ |
error = FT_THROW( Syntax_Error ); |
goto Exit; |
} |
|
if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) ) |
goto Exit; |
p = buffer; |
plimit = p + FT_STREAM_POS() - oldpos; |
} |
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if ( ft_isdigit( *p ) ) |
val = (FT_Byte)( *p - '0' ); |
else if ( *p >= 'a' && *p <= 'f' ) |
val = (FT_Byte)( *p - 'a' ); |
else if ( *p >= 'A' && *p <= 'F' ) |
val = (FT_Byte)( *p - 'A' + 10 ); |
else if ( *p == ' ' || |
*p == '\t' || |
*p == '\r' || |
*p == '\n' || |
*p == '\f' || |
*p == '\0' ) |
{ |
p++; |
continue; |
} |
else if ( *p == '>' ) |
{ |
val = 0; |
done = 1; |
} |
else |
{ |
error = FT_THROW( Syntax_Error ); |
goto Exit; |
} |
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if ( upper_nibble ) |
*d = (FT_Byte)( val << 4 ); |
else |
{ |
*d = (FT_Byte)( *d + val ); |
d++; |
} |
|
upper_nibble = (FT_Byte)( 1 - upper_nibble ); |
|
if ( done ) |
break; |
|
p++; |
} |
|
error = FT_Err_Ok; |
|
Exit: |
return error; |
} |
|
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FT_LOCAL_DEF( FT_Error ) |
cid_face_open( CID_Face face, |
FT_Int face_index ) |
{ |
CID_Loader loader; |
CID_Parser* parser; |
FT_Memory memory = face->root.memory; |
FT_Error error; |
|
|
cid_init_loader( &loader, face ); |
|
parser = &loader.parser; |
error = cid_parser_new( parser, face->root.stream, face->root.memory, |
(PSAux_Service)face->psaux ); |
if ( error ) |
goto Exit; |
|
error = cid_parse_dict( face, &loader, |
parser->postscript, |
parser->postscript_len ); |
if ( error ) |
goto Exit; |
|
if ( face_index < 0 ) |
goto Exit; |
|
if ( FT_NEW( face->cid_stream ) ) |
goto Exit; |
|
if ( parser->binary_length ) |
{ |
/* we must convert the data section from hexadecimal to binary */ |
if ( FT_ALLOC( face->binary_data, parser->binary_length ) || |
cid_hex_to_binary( face->binary_data, parser->binary_length, |
parser->data_offset, face ) ) |
goto Exit; |
|
FT_Stream_OpenMemory( face->cid_stream, |
face->binary_data, parser->binary_length ); |
face->cid.data_offset = 0; |
} |
else |
{ |
*face->cid_stream = *face->root.stream; |
face->cid.data_offset = loader.parser.data_offset; |
} |
|
error = cid_read_subrs( face ); |
|
Exit: |
cid_done_loader( &loader ); |
return error; |
} |
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/* END */ |