File indexing completed on 2025-01-05 03:56:58 

0001 /* -*- C++ -*-
0002  * Copyright 2019-2021 LibRaw LLC (info@libraw.org)
0003  *
0004  LibRaw is free software; you can redistribute it and/or modify
0005  it under the terms of the one of two licenses as you choose:
0006 
0007 1. GNU LESSER GENERAL PUBLIC LICENSE version 2.1
0008    (See file LICENSE.LGPL provided in LibRaw distribution archive for details).
0009 
0010 2. COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
0011    (See file LICENSE.CDDL provided in LibRaw distribution archive for details).
0012 
0013  */
0014 
0015 #include "../../internal/dcraw_defs.h"
0016 
0017 void LibRaw::parseEpsonMakernote(int base, int uptag, unsigned dng_writer)
0018 {
0019 
0020 #define isRIC imgdata.sizes.raw_inset_crops[0]
0021 
0022   unsigned entries, tag, type, len, save;
0023   short morder, sorder = order;
0024   ushort c;
0025   INT64 fsize = ifp->size();
0026 
0027   fseek(ifp, -2, SEEK_CUR);
0028 
0029   entries = get2();
0030   if (entries > 1000)
0031     return;
0032   morder = order;
0033 
0034   while (entries--)
0035   {
0036     order = morder;
0037     tiff_get(base, &tag, &type, &len, &save);
0038     INT64 pos = ifp->tell();
0039     if (len > 8 && pos + len > 2 * fsize)
0040     {
0041       fseek(ifp, save, SEEK_SET); // Recover tiff-read position!!
0042       continue;
0043     }
0044 
0045     tag |= uptag << 16;
0046     if (len > 100 * 1024 * 1024)
0047       goto next; // 100Mb tag? No!
0048 
0049     if (tag == 0x020b)
0050     {
0051       if (tagtypeIs(LIBRAW_EXIFTAG_TYPE_LONG))
0052         isRIC.cwidth = get4();
0053       else if (tagtypeIs(LIBRAW_EXIFTAG_TYPE_SHORT))
0054         isRIC.cwidth = get2();
0055     }
0056     else if (tag == 0x020c)
0057     {
0058       if (tagtypeIs(LIBRAW_EXIFTAG_TYPE_LONG))
0059         isRIC.cheight = get4();
0060       else if (tagtypeIs(LIBRAW_EXIFTAG_TYPE_SHORT))
0061         isRIC.cheight = get2();
0062     }
0063     else if (tag == 0x0400)
0064     {                                 // sensor area
0065       ushort sdims[4] = {0, 0, 0, 0}; // left margin, top margin, width, height
0066       FORC4 sdims[c] = get2();
0067       isRIC.cleft = (sdims[2] - sdims[0] - isRIC.cwidth) / 2;
0068       isRIC.ctop = (sdims[3] - sdims[1] - isRIC.cheight) / 2;
0069     }
0070 
0071     if (dng_writer == nonDNG)
0072     {
0073 
0074       if (tag == 0x0280)
0075       {
0076         thumb_offset = ftell(ifp);
0077         thumb_length = len;
0078       }
0079       else if (tag == 0x0401)
0080       {
0081         FORC4 cblack[RGGB_2_RGBG(c)] = get4();
0082       }
0083       else if (tag == 0x0e80)
0084       {
0085         fseek(ifp, 48, SEEK_CUR);
0086         cam_mul[0] = get2() * 567.0 / 0x10000;
0087         cam_mul[2] = get2() * 431.0 / 0x10000;
0088       }
0089     }
0090 
0091   next:
0092     fseek(ifp, save, SEEK_SET);
0093   }
0094   order = sorder;
0095 #undef isRIC
0096 }