76a5f62323
FT_EXPORT_DEF => FT_EXPORT FT_EXPORT_FUNC => FT_EXPORT_DEF BASE_DEF => FT_BASE BASE_FUNC => FT_BASE_DEF LOCAL_DEF => FT_LOCAL LOCAL_FUNC => FT_LOCAL_DEF LOCAL_FUNC_X => FT_CALLBACK_DEF LOCAL_DEF_X => FT_CALLBACK_TABLE FT_CPLUSPLUS => FT_CALLBACK_TABLE_DEF
166 lines
5.4 KiB
C
166 lines
5.4 KiB
C
/***************************************************************************/
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/* */
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/* cidparse.c */
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/* */
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/* CID-keyed Type1 parser (body). */
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/* */
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/* Copyright 1996-2000 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 <freetype/internal/ftdebug.h>
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#include <freetype/internal/ftcalc.h>
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#include <freetype/internal/ftobjs.h>
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#include <freetype/internal/ftstream.h>
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#include <freetype/internal/t1errors.h>
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#ifdef FT_FLAT_COMPILE
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#include "cidparse.h"
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#else
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#include <cid/cidparse.h>
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#endif
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#include <string.h> /* for strncmp() */
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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_cidparse
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** INPUT STREAM PARSER *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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FT_LOCAL_DEF
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FT_Error CID_New_Parser( CID_Parser* parser,
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FT_Stream stream,
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FT_Memory memory,
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PSAux_Interface* psaux )
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{
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FT_Error error;
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FT_ULong base_offset, offset, ps_len;
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FT_Byte buffer[256 + 10];
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FT_Int buff_len;
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MEM_Set( parser, 0, sizeof ( *parser ) );
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psaux->t1_parser_funcs->init( &parser->root, 0, 0, memory );
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parser->stream = stream;
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base_offset = FILE_Pos();
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/* first of all, check the font format in the header */
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if ( ACCESS_Frame( 31 ) )
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goto Exit;
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if ( strncmp( (char *)stream->cursor,
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"%!PS-Adobe-3.0 Resource-CIDFont", 31 ) )
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{
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FT_TRACE2(( "[not a valid CID-keyed font]\n" ));
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error = FT_Err_Unknown_File_Format;
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}
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FORGET_Frame();
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if ( error )
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goto Exit;
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/* now, read the rest of the file, until we find a `StartData' */
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buff_len = 256;
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for (;;)
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{
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FT_Byte *p, *limit = buffer + 256;
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FT_ULong top_position;
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/* fill input buffer */
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buff_len -= 256;
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if ( buff_len > 0 )
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MEM_Move( buffer, limit, buff_len );
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p = buffer + buff_len;
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if ( FILE_Read( p, 256 + 10 - buff_len ) )
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goto Exit;
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top_position = FILE_Pos() - buff_len;
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buff_len = 256 + 10;
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/* look for `StartData' */
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for ( p = buffer; p < limit; p++ )
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{
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if ( p[0] == 'S' && strncmp( (char*)p, "StartData", 9 ) == 0 )
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{
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/* save offset of binary data after `StartData' */
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offset = top_position - ( limit - p ) + 10;
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goto Found;
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}
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}
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}
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Found:
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/* we have found the start of the binary data. We will now */
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/* rewind and extract the frame of corresponding to the Postscript */
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/* section */
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ps_len = offset - base_offset;
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if ( FILE_Seek( base_offset ) ||
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EXTRACT_Frame( ps_len, parser->postscript ) )
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goto Exit;
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parser->data_offset = offset;
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parser->postscript_len = ps_len;
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parser->root.base = parser->postscript;
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parser->root.cursor = parser->postscript;
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parser->root.limit = parser->root.cursor + ps_len;
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parser->num_dict = -1;
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Exit:
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return error;
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}
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FT_LOCAL_DEF
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void CID_Done_Parser( CID_Parser* parser )
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{
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/* always free the private dictionary */
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if ( parser->postscript )
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{
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FT_Stream stream = parser->stream;
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RELEASE_Frame( parser->postscript );
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}
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parser->root.funcs.done( &parser->root );
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}
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/* END */
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