Camelot: AI8EPSFilter Class Reference

Checks to see if the EPS comment headers specify that this is an AI generated EPS file, as required.

00221 {
00222     UINT32  Lines   = 0;
00223     TCHAR   *Buffer = NULL;
00224 
00225     // !PS-Adobe line is ok - check creator line...
00226     CCMemTextFile HeaderFile ( reinterpret_cast<char *> ( pFileHeader ), HeaderSize );
00227 
00228     if( HeaderFile.IsMemFileInited () == FALSE || HeaderFile.InitLexer () == FALSE )
00229     {
00230         HeaderFile.close();
00231         return 0;
00232     }
00233 
00234     // Graeme (28/6/00) - Adobe have changed their file format, and so the first line can
00235     // now be a %PDF directive. Therefore look for this directive in the first twenty
00236     // lines.
00237     while ( ( Lines < 100 ) && !HeaderFile.eof () )
00238     {
00239         // Get the current line from the file.
00240         HeaderFile.GetLineToken();
00241         Buffer = const_cast<TCHAR *> ( HeaderFile.GetTokenBuf () );
00242 
00243         // Ensure that it's OK.
00244         ERROR2IF(Buffer == 0, 0, "Returned buffer from lex file == 0");
00245 
00246         // Increment the line counter.
00247         Lines++;
00248 
00249         if (camStrncmp(Buffer, _T("%!PS-Adobe"), 10) == 0)
00250         {
00251             // Now find the %%Creator string.
00252             while ((Lines < 100) && !HeaderFile.eof())
00253             {
00254                 HeaderFile.GetLineToken();
00255                 Buffer = const_cast<TCHAR *> ( HeaderFile.GetTokenBuf() );
00256                 ERROR2IF(Buffer == 0, 0, "Returned buffer from lex file == 0");
00257                 Lines++;
00258 
00259                 // Return TRUE if this file was created by Illustrator, or has been exported in 
00260                 // Illustrator format.
00261                 if (camStrncmp(Buffer, _T("%%Creator: Adobe Illustrator(R) 8"), 33) == 0)
00262                 {
00263                     // We definitely want this.
00264                     HeaderFile.close();
00265                     return 10;
00266                 }
00267 
00268                 // Check to see if it's from Illustrator 9. If you're writing a dedicated AI9
00269                 // filter, then you really should remove this code.
00270                 else if (camStrncmp(Buffer, _T("%%Creator: Adobe Illustrator(R) 9"), 33) == 0)
00271                 {
00272                     // We probably want this. Note: I'm returning 9 because a native AI9
00273                     // filter would return 10, and if this code is left in, it will be
00274                     // ignored.
00275                     HeaderFile.close();
00276                     return 9;
00277                 }
00278 
00279                 if (camStrncmp(Buffer, _T("%%Creator:"), 10) == 0)
00280                 {
00281                     // Found the creator line - does it contain the word Illustrator?
00282                     if (camStrstr( (const TCHAR*)Buffer, _T("Illustrator(R) 8")) != NULL)
00283                     {
00284                         HeaderFile.close();
00285                         return 10;
00286                     }
00287                     
00288                     // Try to see if it's Illustrator 9. Again, remove this code when you're
00289                     // writing a dedicated AI9 filter.
00290                     else if (camStrstr( (const TCHAR*)Buffer, _T("Illustrator(R) 9")) != NULL)
00291                     {
00292                         HeaderFile.close();
00293                         return 9;
00294                     }
00295 
00296                     // Not an AI file.
00297                     else
00298                     {
00299                         break;
00300                     }
00301                 }
00302 
00303                 // If we find the compression token then stop the search as we don't want to
00304                 // start looking in the compressed data!
00305                 if (camStrncmp(Buffer, _T("%%Compression:"), 14)==0)
00306                     break;
00307             }
00308 
00309             // Remember to close the file before returning.
00310             HeaderFile.close();
00311 
00312             // Didn't find a suitable Creator line, but the EPS line was ok, so return
00313             // that we're interested, but not sure.
00314             return 5;
00315         }
00316 
00317         // If we find the compression token then stop the search as we don't want to start
00318         // looking in the compressed data!
00319         if (camStrncmp(Buffer, _T("%%Compression:"), 14)==0)
00320             break;
00321     }
00322 
00323     // Remember to close the file before returning.
00324     HeaderFile.close();
00325     
00326     // This file type isn't suitable.
00327     return 0;
00328 }


Public Member Functions
	AI8EPSFilter ()
	Default constructor, which sets the class details.
virtual	~AI8EPSFilter ()
	Default destructor. Cleans up all instantiated data for the class.
virtual BOOL	Init ()
	Since the constructor can't fail, it does things that the constructor can't do.
virtual INT32	EPSHeaderIsOk (ADDR pFileHeader, UINT32 HeaderSize)
	Checks to see if the EPS comment headers specify that this is an AI generated EPS file, as required.
virtual void	LookUpToken ()
	Compare the current token against the AI keywords to see if it is one of them.
virtual BOOL	ProcessToken ()
	Checks if we're looking at the version 8.0 layer token otherwise delegates to the base class.
Protected Member Functions
virtual BOOL	DecodeLayer (void)
	Inserts a layer into the tree.
Private Member Functions
	CC_DECLARE_DYNAMIC (AI8EPSFilter)

AI8EPSFilter Class Reference

Public Member Functions

Protected Member Functions

Private Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation