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  1. /*
  2.     This file is part of "Filter Foundry", a filter plugin for Adobe Photoshop
  3.     Copyright (C) 2003-2009 Toby Thain, toby@telegraphics.com.au
  4.     Copyright (C) 2018-2021 Daniel Marschall, ViaThinkSoft
  5.  
  6.     This program is free software; you can redistribute it and/or modify
  7.     it under the terms of the GNU General Public License as published by
  8.     the Free Software Foundation; either version 2 of the License, or
  9.     (at your option) any later version.
  10.  
  11.     This program is distributed in the hope that it will be useful,
  12.     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14.     GNU General Public License for more details.
  15.  
  16.     You should have received a copy of the GNU General Public License
  17.     along with this program; if not, write to the Free Software
  18.     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19. */
  20.  
  21. #include "ff.h"
  22.  
  23. #include <Resources.h>
  24.  
  25. #include "file_compat.h"
  26.  
  27. Boolean readPARMresource(HMODULE hm,char **reason,int readobfusc){
  28.         Boolean res = false;
  29.         Handle h;
  30.  
  31.         if( !(h = Get1Resource(PARM_TYPE,PARM_ID))
  32.           && readobfusc
  33.           && (h = Get1Resource('DATA',OBFUSCDATA_ID)) ){
  34.                 HLock(h);
  35.                 deobfusc((unsigned char*)*h,GetHandleSize(h),OBFUSC_SEED_POS);
  36.                 gdata->obfusc = true;
  37.         }
  38.         if(h){
  39.                 HLock(h);
  40.                 res = readPARM(*h, &gdata->parm, reason, 0 /*Mac format resource*/);
  41.                 ReleaseResource(h);
  42.                 gdata->obfusc = false;
  43.         }
  44.         if (!res) {
  45.                 gdata->obfusc = false;
  46.         }
  47.         return res;
  48. }
  49.  
  50. static Boolean readmacplugin(StandardFileReply *sfr,char **reason){
  51.         Boolean res = false;
  52.         short rrn = FSpOpenResFile(&sfr->sfFile,fsRdPerm);
  53.  
  54.         if(rrn != -1){
  55.                 if(readPARMresource(NULL,reason,0))
  56.                         res = true;
  57.                 CloseResFile(rrn);
  58.         }else
  59.                 *reason = "Could not open file.";
  60.         return res;
  61. }
  62.  
  63. Boolean loadfile(StandardFileReply *sfr,char **reason){
  64.         Boolean readok = false;
  65.         FInfo fndrInfo;
  66.  
  67.         if(FSpGetFInfo(&sfr->sfFile,&fndrInfo) == noErr){
  68.                 // first try to read text parameters (AFS, TXT, PFF)
  69.                 if( (readok = readfile(sfr,reason)) ) {
  70.                         gdata->parmloaded = false;
  71.                         gdata->obfusc = false;
  72.                         // then try plugin formats (Mac first, then Windows .8bf or .prm DLL)
  73.                 }else if( (readok = readmacplugin(sfr,reason) || read8bfplugin(sfr,reason)) ){
  74.                         if ((gdata->parm.cbSize != PARM_SIZE) && (gdata->parm.cbSize != PARM_SIZE_PREMIERE) && (gdata->parm.cbSize != PARM_SIG_MAC)) {
  75.                                 *reason = "Incompatible obfuscation.";
  76.                                 return false; // Stop! We know the issue now.
  77.                         }else if(gdata->parm.iProtected){
  78.                                 *reason = "The filter is protected.";
  79.                                 return false;
  80.                         }else
  81.                                 gdata->parmloaded = true;
  82.                 }else
  83.                         *reason = "It is not a text parameter (AFS) file, nor a standalone Mac/PC filter made by Filter Factory/Filter Foundry.";
  84.         }
  85.  
  86.         return readok;
  87. }
  88.