673 lines
17 KiB
C
673 lines
17 KiB
C
/***************************************************************************/
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/* */
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/* cidload.c */
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/* */
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/* CID-keyed Type1 font loader (body). */
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/* */
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/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2009 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#include <ft2build.h>
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#include FT_INTERNAL_DEBUG_H
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#include FT_CONFIG_CONFIG_H
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#include FT_MULTIPLE_MASTERS_H
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#include FT_INTERNAL_TYPE1_TYPES_H
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#include "cidload.h"
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#include "ciderrs.h"
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_cidload
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/* read a single offset */
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FT_LOCAL_DEF( FT_Long )
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cid_get_offset( FT_Byte* *start,
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FT_Byte offsize )
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{
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FT_Long result;
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FT_Byte* p = *start;
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for ( result = 0; offsize > 0; offsize-- )
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{
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result <<= 8;
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result |= *p++;
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}
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*start = p;
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return result;
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}
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** TYPE 1 SYMBOL PARSING *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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static FT_Error
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cid_load_keyword( CID_Face face,
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CID_Loader* loader,
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const T1_Field keyword )
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{
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FT_Error error;
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CID_Parser* parser = &loader->parser;
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FT_Byte* object;
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void* dummy_object;
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CID_FaceInfo cid = &face->cid;
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/* if the keyword has a dedicated callback, call it */
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if ( keyword->type == T1_FIELD_TYPE_CALLBACK )
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{
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keyword->reader( (FT_Face)face, parser );
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error = parser->root.error;
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goto Exit;
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}
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/* we must now compute the address of our target object */
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switch ( keyword->location )
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{
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case T1_FIELD_LOCATION_CID_INFO:
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object = (FT_Byte*)cid;
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break;
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case T1_FIELD_LOCATION_FONT_INFO:
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object = (FT_Byte*)&cid->font_info;
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break;
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case T1_FIELD_LOCATION_FONT_EXTRA:
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object = (FT_Byte*)&face->font_extra;
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break;
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case T1_FIELD_LOCATION_BBOX:
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object = (FT_Byte*)&cid->font_bbox;
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break;
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default:
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{
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CID_FaceDict dict;
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if ( parser->num_dict < 0 )
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{
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FT_ERROR(( "cid_load_keyword: invalid use of `%s'!\n",
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keyword->ident ));
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error = CID_Err_Syntax_Error;
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goto Exit;
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}
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dict = cid->font_dicts + parser->num_dict;
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switch ( keyword->location )
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{
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case T1_FIELD_LOCATION_PRIVATE:
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object = (FT_Byte*)&dict->private_dict;
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break;
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default:
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object = (FT_Byte*)dict;
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}
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}
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}
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dummy_object = object;
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/* now, load the keyword data in the object's field(s) */
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if ( keyword->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
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keyword->type == T1_FIELD_TYPE_FIXED_ARRAY )
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error = cid_parser_load_field_table( &loader->parser, keyword,
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&dummy_object );
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else
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error = cid_parser_load_field( &loader->parser,
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keyword, &dummy_object );
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Exit:
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return error;
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}
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FT_CALLBACK_DEF( FT_Error )
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parse_font_matrix( CID_Face face,
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CID_Parser* parser )
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{
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FT_Matrix* matrix;
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FT_Vector* offset;
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CID_FaceDict dict;
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FT_Face root = (FT_Face)&face->root;
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FT_Fixed temp[6];
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FT_Fixed temp_scale;
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if ( parser->num_dict >= 0 )
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{
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dict = face->cid.font_dicts + parser->num_dict;
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matrix = &dict->font_matrix;
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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 */
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/* `1000/temp_scale', because temp_scale was already multiplied by */
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/* 1000 (in `t1_tofixed', from psobjs.c). */
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root->units_per_EM = (FT_UShort)( FT_DivFix( 0x10000L,
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FT_DivFix( temp_scale, 1000 ) ) );
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/* we need to scale the values by 1.0/temp[3] */
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if ( temp_scale != 0x10000L )
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{
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temp[0] = FT_DivFix( temp[0], temp_scale );
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temp[1] = FT_DivFix( temp[1], temp_scale );
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temp[2] = FT_DivFix( temp[2], temp_scale );
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temp[4] = FT_DivFix( temp[4], temp_scale );
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temp[5] = FT_DivFix( temp[5], temp_scale );
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temp[3] = 0x10000L;
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}
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matrix->xx = temp[0];
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matrix->yx = temp[1];
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matrix->xy = temp[2];
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matrix->yy = temp[3];
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/* note that the font offsets are expressed in integer font units */
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offset->x = temp[4] >> 16;
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offset->y = temp[5] >> 16;
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}
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return CID_Err_Ok; /* this is a callback function; */
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/* we must return an error code */
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}
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FT_CALLBACK_DEF( FT_Error )
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parse_fd_array( CID_Face face,
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CID_Parser* parser )
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{
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CID_FaceInfo cid = &face->cid;
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FT_Memory memory = face->root.memory;
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FT_Error error = CID_Err_Ok;
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FT_Long num_dicts;
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num_dicts = cid_parser_to_int( parser );
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if ( !cid->font_dicts )
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{
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FT_Int n;
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if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) )
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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 */
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for ( n = 0; n < cid->num_dicts; n++ )
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{
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CID_FaceDict dict = cid->font_dicts + n;
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/* default value for lenIV */
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dict->private_dict.lenIV = 4;
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}
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}
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Exit:
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return error;
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}
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/* by mistake, `expansion_factor' appears both in PS_PrivateRec */
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/* and CID_FaceDictRec (both are public header files and can't */
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/* changed); we simply copy the value */
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FT_CALLBACK_DEF( FT_Error )
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parse_expansion_factor( CID_Face face,
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CID_Parser* parser )
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{
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CID_FaceDict dict;
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if ( parser->num_dict >= 0 )
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{
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dict = face->cid.font_dicts + parser->num_dict;
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dict->expansion_factor = cid_parser_to_fixed( parser, 0 );
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dict->private_dict.expansion_factor = dict->expansion_factor;
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}
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return CID_Err_Ok;
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}
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static
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const T1_FieldRec cid_field_records[] =
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{
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#include "cidtoken.h"
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T1_FIELD_CALLBACK( "FDArray", parse_fd_array, 0 )
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T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix, 0 )
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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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};
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static FT_Error
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cid_parse_dict( CID_Face face,
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CID_Loader* loader,
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FT_Byte* base,
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FT_Long size )
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{
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CID_Parser* parser = &loader->parser;
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parser->root.cursor = base;
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parser->root.limit = base + size;
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parser->root.error = CID_Err_Ok;
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{
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FT_Byte* cur = base;
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FT_Byte* limit = cur + size;
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for (;;)
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{
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FT_Byte* newlimit;
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parser->root.cursor = cur;
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cid_parser_skip_spaces( parser );
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if ( parser->root.cursor >= limit )
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newlimit = limit - 1 - 17;
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else
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newlimit = parser->root.cursor - 17;
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/* look for `%ADOBeginFontDict' */
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for ( ; cur < newlimit; cur++ )
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{
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if ( *cur == '%' &&
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ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 )
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{
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/* if /FDArray was found, then cid->num_dicts is > 0, and */
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/* we can start increasing parser->num_dict */
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if ( face->cid.num_dicts > 0 )
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parser->num_dict++;
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}
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}
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cur = parser->root.cursor;
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/* no error can occur in cid_parser_skip_spaces */
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if ( cur >= limit )
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break;
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cid_parser_skip_PS_token( parser );
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if ( parser->root.cursor >= limit || parser->root.error )
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break;
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/* look for immediates */
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if ( *cur == '/' && cur + 2 < limit )
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{
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FT_PtrDist len;
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cur++;
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len = parser->root.cursor - cur;
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if ( len > 0 && len < 22 )
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{
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/* now compare the immediate name to the keyword table */
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T1_Field keyword = (T1_Field)cid_field_records;
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for (;;)
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{
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FT_Byte* name;
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name = (FT_Byte*)keyword->ident;
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if ( !name )
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break;
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if ( cur[0] == name[0] &&
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len == (FT_PtrDist)ft_strlen( (const char*)name ) )
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{
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FT_PtrDist n;
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for ( n = 1; n < len; n++ )
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if ( cur[n] != name[n] )
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break;
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if ( n >= len )
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{
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/* we found it - run the parsing callback */
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parser->root.error = cid_load_keyword( face,
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loader,
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keyword );
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if ( parser->root.error )
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return parser->root.error;
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break;
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}
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}
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keyword++;
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}
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}
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}
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cur = parser->root.cursor;
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}
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}
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return parser->root.error;
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}
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/* read the subrmap and the subrs of each font dict */
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static FT_Error
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cid_read_subrs( CID_Face face )
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{
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CID_FaceInfo cid = &face->cid;
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FT_Memory memory = face->root.memory;
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FT_Stream stream = face->cid_stream;
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FT_Error error;
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FT_Int n;
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CID_Subrs subr;
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FT_UInt max_offsets = 0;
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FT_ULong* offsets = 0;
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PSAux_Service psaux = (PSAux_Service)face->psaux;
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if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) )
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goto Exit;
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subr = face->subrs;
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for ( n = 0; n < cid->num_dicts; n++, subr++ )
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{
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CID_FaceDict dict = cid->font_dicts + n;
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FT_Int lenIV = dict->private_dict.lenIV;
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FT_UInt count, num_subrs = dict->num_subrs;
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FT_ULong data_len;
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FT_Byte* p;
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/* reallocate offsets array if needed */
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if ( num_subrs + 1 > max_offsets )
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{
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FT_UInt new_max = FT_PAD_CEIL( num_subrs + 1, 4 );
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if ( FT_RENEW_ARRAY( offsets, max_offsets, new_max ) )
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goto Fail;
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max_offsets = new_max;
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}
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/* read the subrmap's offsets */
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if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) ||
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FT_FRAME_ENTER( ( num_subrs + 1 ) * dict->sd_bytes ) )
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goto Fail;
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p = (FT_Byte*)stream->cursor;
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for ( count = 0; count <= num_subrs; count++ )
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offsets[count] = cid_get_offset( &p, (FT_Byte)dict->sd_bytes );
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FT_FRAME_EXIT();
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/* now, compute the size of subrs charstrings, */
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/* allocate, and read them */
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data_len = offsets[num_subrs] - offsets[0];
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if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) ||
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FT_ALLOC( subr->code[0], data_len ) )
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goto Fail;
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if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) ||
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FT_STREAM_READ( subr->code[0], data_len ) )
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goto Fail;
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/* set up pointers */
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for ( count = 1; count <= num_subrs; count++ )
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{
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FT_ULong len;
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len = offsets[count] - offsets[count - 1];
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subr->code[count] = subr->code[count - 1] + len;
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}
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/* decrypt subroutines, but only if lenIV >= 0 */
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if ( lenIV >= 0 )
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{
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for ( count = 0; count < num_subrs; count++ )
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{
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FT_ULong len;
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len = offsets[count + 1] - offsets[count];
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psaux->t1_decrypt( subr->code[count], len, 4330 );
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}
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}
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subr->num_subrs = num_subrs;
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}
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Exit:
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FT_FREE( offsets );
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return error;
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Fail:
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if ( face->subrs )
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{
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for ( n = 0; n < cid->num_dicts; n++ )
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{
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if ( face->subrs[n].code )
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FT_FREE( face->subrs[n].code[0] );
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FT_FREE( face->subrs[n].code );
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}
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FT_FREE( face->subrs );
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}
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goto Exit;
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}
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static void
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t1_init_loader( CID_Loader* loader,
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CID_Face face )
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{
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FT_UNUSED( face );
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FT_MEM_ZERO( loader, sizeof ( *loader ) );
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}
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static void
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t1_done_loader( CID_Loader* loader )
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{
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CID_Parser* parser = &loader->parser;
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/* finalize parser */
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cid_parser_done( parser );
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}
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static FT_Error
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cid_hex_to_binary( FT_Byte* data,
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FT_Long data_len,
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FT_ULong offset,
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CID_Face face )
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{
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FT_Stream stream = face->root.stream;
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FT_Error error;
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FT_Byte buffer[256];
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FT_Byte *p, *plimit;
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FT_Byte *d, *dlimit;
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FT_Byte val;
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FT_Bool upper_nibble, done;
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if ( FT_STREAM_SEEK( offset ) )
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goto Exit;
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d = data;
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dlimit = d + data_len;
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p = buffer;
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plimit = p;
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upper_nibble = 1;
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done = 0;
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while ( d < dlimit )
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{
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if ( p >= plimit )
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{
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FT_ULong oldpos = FT_STREAM_POS();
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FT_ULong size = stream->size - oldpos;
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if ( size == 0 )
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{
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error = CID_Err_Syntax_Error;
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goto Exit;
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}
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if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) )
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goto Exit;
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p = buffer;
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plimit = p + FT_STREAM_POS() - oldpos;
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}
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if ( ft_isdigit( *p ) )
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val = (FT_Byte)( *p - '0' );
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else if ( *p >= 'a' && *p <= 'f' )
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val = (FT_Byte)( *p - 'a' );
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else if ( *p >= 'A' && *p <= 'F' )
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val = (FT_Byte)( *p - 'A' + 10 );
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else if ( *p == ' ' ||
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*p == '\t' ||
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*p == '\r' ||
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*p == '\n' ||
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*p == '\f' ||
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*p == '\0' )
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{
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p++;
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continue;
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}
|
|
else if ( *p == '>' )
|
|
{
|
|
val = 0;
|
|
done = 1;
|
|
}
|
|
else
|
|
{
|
|
error = CID_Err_Syntax_Error;
|
|
goto Exit;
|
|
}
|
|
|
|
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 = CID_Err_Ok;
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
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;
|
|
|
|
|
|
t1_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:
|
|
t1_done_loader( &loader );
|
|
return error;
|
|
}
|
|
|
|
|
|
/* END */
|