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- /***************************************************************************/
- /* */
- /* cidparse.c */
- /* */
- /* CID-keyed Type1 parser (body). */
- /* */
- /* Copyright 1996-2001, 2002 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_INTERNAL_DEBUG_H
- #include FT_INTERNAL_CALC_H
- #include FT_INTERNAL_OBJECTS_H
- #include FT_INTERNAL_STREAM_H
- #include "cidparse.h"
- #include "ciderrs.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_cidparse
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** INPUT STREAM PARSER *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- FT_LOCAL_DEF( FT_Error )
- cid_parser_new( CID_Parser* parser,
- FT_Stream stream,
- FT_Memory memory,
- PSAux_Service psaux )
- {
- FT_Error error;
- FT_ULong base_offset, offset, ps_len;
- FT_Byte buffer[256 + 10];
- FT_Int buff_len;
- FT_MEM_ZERO( parser, sizeof ( *parser ) );
- psaux->ps_parser_funcs->init( &parser->root, 0, 0, memory );
- parser->stream = stream;
- base_offset = FT_STREAM_POS();
- /* first of all, check the font format in the header */
- if ( FT_FRAME_ENTER( 31 ) )
- goto Exit;
- if ( ft_strncmp( (char *)stream->cursor,
- "%!PS-Adobe-3.0 Resource-CIDFont", 31 ) )
- {
- FT_TRACE2(( "[not a valid CID-keyed font]\n" ));
- error = CID_Err_Unknown_File_Format;
- }
- FT_FRAME_EXIT();
- if ( error )
- goto Exit;
- /* now, read the rest of the file, until we find a `StartData' */
- buff_len = 256;
- for (;;)
- {
- FT_Byte *p, *limit = buffer + 256;
- FT_ULong top_position;
- /* fill input buffer */
- buff_len -= 256;
- if ( buff_len > 0 )
- FT_MEM_MOVE( buffer, limit, buff_len );
- p = buffer + buff_len;
- if ( FT_STREAM_READ( p, 256 + 10 - buff_len ) )
- goto Exit;
- top_position = FT_STREAM_POS() - buff_len;
- buff_len = 256 + 10;
- /* look for `StartData' */
- for ( p = buffer; p < limit; p++ )
- {
- if ( p[0] == 'S' && ft_strncmp( (char*)p, "StartData", 9 ) == 0 )
- {
- /* save offset of binary data after `StartData' */
- offset = (FT_ULong)( top_position - ( limit - p ) + 10 );
- goto Found;
- }
- }
- }
- Found:
- /* we have found the start of the binary data. We will now */
- /* rewind and extract the frame of corresponding to the Postscript */
- /* section */
- ps_len = offset - base_offset;
- if ( FT_STREAM_SEEK( base_offset ) ||
- FT_FRAME_EXTRACT( ps_len, parser->postscript ) )
- goto Exit;
- parser->data_offset = offset;
- parser->postscript_len = ps_len;
- parser->root.base = parser->postscript;
- parser->root.cursor = parser->postscript;
- parser->root.limit = parser->root.cursor + ps_len;
- parser->num_dict = -1;
- Exit:
- return error;
- }
- FT_LOCAL_DEF( void )
- cid_parser_done( CID_Parser* parser )
- {
- /* always free the private dictionary */
- if ( parser->postscript )
- {
- FT_Stream stream = parser->stream;
- FT_FRAME_RELEASE( parser->postscript );
- }
- parser->root.funcs.done( &parser->root );
- }
- /* END */
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