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  1. /*
  2.     This file is part of "Filter Foundry", a filter plugin for Adobe Photoshop
  3.     Copyright (C) 2003-6 Toby Thain, toby@telegraphics.com.au
  4.  
  5.     This program is free software; you can redistribute it and/or modify
  6.     it under the terms of the GNU General Public License as published by  
  7.     the Free Software Foundation; either version 2 of the License, or
  8.     (at your option) any later version.
  9.  
  10.     This program is distributed in the hope that it will be useful,
  11.     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13.     GNU General Public License for more details.
  14.  
  15.     You should have received a copy of the GNU General Public License  
  16.     along with this program; if not, write to the Free Software
  17.     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18. */
  19.  
  20. #include "ff.h"
  21.  
  22. #include <Endian.h>
  23.  
  24. #include "file_compat.h"
  25.  
  26. Boolean readmacplugin(StandardFileReply *sfr,char **reason);
  27. Boolean read8bfplugin(StandardFileReply *sfr,char **reason);
  28.  
  29. Boolean readPARMresource(HMODULE hm,char **reason){
  30.         Boolean res = false;
  31.         Handle h = Get1Resource(PARM_TYPE,PARM_ID);
  32.         if(h){
  33.                 HLock(h);
  34.                 res = readPARM(*h, &gdata->parm, reason, 0 /*Mac format resource*/);
  35.                 ReleaseResource(h);
  36.         }
  37.         return res;
  38. }
  39.  
  40. Boolean readmacplugin(StandardFileReply *sfr,char **reason){
  41.         Boolean res = false;
  42.         short rrn = FSpOpenResFile(&sfr->sfFile,fsRdPerm);
  43.        
  44.         if( rrn != -1 ){
  45.                 if(readPARMresource(NULL,reason))
  46.                         res = true;
  47.                 CloseResFile(rrn);
  48.         }else
  49.                 *reason = "Could not open file.";
  50.         return res;
  51. }
  52.  
  53. Boolean read8bfplugin(StandardFileReply *sfr,char **reason){
  54.         unsigned char magic[2];
  55.         long count;
  56.         Handle h;
  57.         Boolean res = false;
  58.         short refnum;
  59.         int i;
  60.        
  61.         if( ! FSpOpenDF(&sfr->sfFile,fsRdPerm,&refnum) ){
  62.                 // check DOS EXE magic number
  63.                 count = 2;
  64.                 if(!FSRead(refnum,&count,magic) && magic[0]=='M' && magic[1]=='Z'){
  65.                         if(!GetEOF(refnum,&count) && count < 256L<<10){ // sanity check file size < 256K
  66.                                 if( (h = readfileintohandle(refnum)) ){
  67.                                         long *q = (long*)PILOCKHANDLE(h,false);
  68.                                        
  69.                                         // look for signature at start of valid PARM resource
  70.                                         // This signature is observed in Filter Factory standalones.
  71.                                         for( count /= 4 ; count >= PARM_SIZE/4 ; --count, ++q )
  72.                                                 if( EndianS32_LtoN(q[0]) == PARM_SIZE && EndianS32_LtoN(q[1]) == 1
  73.                                                         && (res = readPARM((char*)q, &gdata->parm, reason, 1 /*Windows format resource*/)) )
  74.                                                 {
  75.                                                         // these are the only numeric fields we *have* to swap
  76.                                                         // all the rest are flags which (if we're careful) will work in either ordering
  77.                                                         for(i=0;i<8;++i)
  78.                                                                 slider[i] = EndianS32_LtoN(slider[i]);
  79.                                                 }
  80.  
  81.                                         PIDISPOSEHANDLE(h);
  82.                                 }
  83.                         }
  84.                 } // else no point in proceeding
  85.                 FSClose(refnum);
  86.         }else
  87.                 *reason = "Could not open file.";
  88.         return res;
  89. }
  90.  
  91. Boolean loadfile(StandardFileReply *sfr,char **reason){
  92.         Boolean readok = false;
  93.         FInfo fndrInfo;
  94.  
  95.         if(!FSpGetFInfo(&sfr->sfFile,&fndrInfo)){
  96.                 // first try to read text parameters (AFS, TXT)
  97.                 if( (readok = readfile(sfr,reason)) )
  98.                         gdata->parmloaded = false;
  99.                         // then try plugin formats (Mac first, then Windows .8bf DLL)
  100.                 else if( (readok = readmacplugin(sfr,reason) || read8bfplugin(sfr,reason)) ){
  101.                         if(gdata->parm.iProtected){
  102.                                 *reason = "The filter is protected.";
  103.                                 return false;
  104.                         }else
  105.                                 gdata->parmloaded = true;
  106.                 }else *reason = "It is not a text parameter (AFS) file, nor a standalone Mac/PC filter made by Filter Factory/Filter Foundry.";
  107.         }
  108.  
  109.         return readok;
  110. }
  111.