]> git.saurik.com Git - wxWidgets.git/blobdiff - src/tiff/tif_dir.c
revert togglable tools to previous state if the change was vetoed by OnLeftClick()
[wxWidgets.git] / src / tiff / tif_dir.c
index 05283c2a6dbfed222ff919eb59f6f290faa4f9c5..7b9ae207e94adebba512c1a64b2445acc5b6f546 100644 (file)
 #define DATATYPE_UINT          2       /* !unsigned integer data */
 #define DATATYPE_IEEEFP                3       /* !IEEE floating point data */
 
-void
-_TIFFsetByteArray(void** vpp, void* vp, long n)
+static void
+setByteArray(void** vpp, void* vp, size_t nmemb, size_t elem_size)
 {
        if (*vpp)
                _TIFFfree(*vpp), *vpp = 0;
-       if (vp && (*vpp = (void*) _TIFFmalloc(n)))
-               _TIFFmemcpy(*vpp, vp, n);
+       if (vp) {
+               tsize_t bytes = nmemb * elem_size;
+               if (elem_size && bytes / elem_size == nmemb)
+                       *vpp = (void*) _TIFFmalloc(bytes);
+               if (*vpp)
+                       _TIFFmemcpy(*vpp, vp, bytes);
+       }
 }
+void _TIFFsetByteArray(void** vpp, void* vp, long n)
+    { setByteArray(vpp, vp, n, 1); }
 void _TIFFsetString(char** cpp, char* cp)
-    { _TIFFsetByteArray((void**) cpp, (void*) cp, (long) (strlen(cp)+1)); }
+    { setByteArray((void**) cpp, (void*) cp, strlen(cp)+1, 1); }
 void _TIFFsetNString(char** cpp, char* cp, long n)
-    { _TIFFsetByteArray((void**) cpp, (void*) cp, n); }
+    { setByteArray((void**) cpp, (void*) cp, n, 1); }
 void _TIFFsetShortArray(uint16** wpp, uint16* wp, long n)
-    { _TIFFsetByteArray((void**) wpp, (void*) wp, n*sizeof (uint16)); }
+    { setByteArray((void**) wpp, (void*) wp, n, sizeof (uint16)); }
 void _TIFFsetLongArray(uint32** lpp, uint32* lp, long n)
-    { _TIFFsetByteArray((void**) lpp, (void*) lp, n*sizeof (uint32)); }
+    { setByteArray((void**) lpp, (void*) lp, n, sizeof (uint32)); }
 void _TIFFsetFloatArray(float** fpp, float* fp, long n)
-    { _TIFFsetByteArray((void**) fpp, (void*) fp, n*sizeof (float)); }
+    { setByteArray((void**) fpp, (void*) fp, n, sizeof (float)); }
 void _TIFFsetDoubleArray(double** dpp, double* dp, long n)
-    { _TIFFsetByteArray((void**) dpp, (void*) dp, n*sizeof (double)); }
+    { setByteArray((void**) dpp, (void*) dp, n, sizeof (double)); }
 
 /*
  * Install extra samples information.
@@ -84,7 +91,6 @@ setExtraSamples(TIFFDirectory* td, va_list ap, int* v)
        return (1);
 }
 
-#ifdef CMYK_SUPPORT
 static int
 checkInkNamesString(TIFF* tif, int slen, const char* s)
 {
@@ -110,15 +116,15 @@ bad:
            td->td_samplesperpixel-i);
        return (0);
 }
-#endif
 
 static int
 _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
 {
+       static const char module[] = "_TIFFVSetField";
+       
        TIFFDirectory* td = &tif->tif_dir;
        int status = 1;
        uint32 v32;
-       uint16 v16;
        int i, v;
        double d;
        char* s;
@@ -153,14 +159,14 @@ _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
                }
                break;
        case TIFFTAG_COMPRESSION:
-               v16 = va_arg(ap, int) & 0xffff;
+               v = va_arg(ap, int) & 0xffff;
                /*
                 * If we're changing the compression scheme,
                 * the notify the previous module so that it
                 * can cleanup any state it's setup.
                 */
                if (TIFFFieldSet(tif, FIELD_COMPRESSION)) {
-                       if (td->td_compression == v16)
+                       if (td->td_compression == v)
                                break;
                        (*tif->tif_cleanup)(tif);
                        tif->tif_flags &= ~TIFF_CODERSETUP;
@@ -168,8 +174,10 @@ _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
                /*
                 * Setup new compression routine state.
                 */
-               if( (status = TIFFSetCompressionScheme(tif, v16)) != 0 )
-                       td->td_compression = v16;
+               if( (status = TIFFSetCompressionScheme(tif, v)) != 0 )
+                    td->td_compression = (uint16) v;
+                else
+                    status = 0;
                break;
        case TIFFTAG_PHOTOMETRIC:
                td->td_photometric = (uint16) va_arg(ap, int);
@@ -204,8 +212,8 @@ _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
        case TIFFTAG_MODEL:
                _TIFFsetString(&td->td_model, va_arg(ap, char*));
                break;
-       case TIFFTAG_SOFTWARE:
-               _TIFFsetString(&td->td_software, va_arg(ap, char*));
+       case TIFFTAG_COPYRIGHT:
+               _TIFFsetString(&td->td_copyright, va_arg(ap, char*));
                break;
        case TIFFTAG_ORIENTATION:
                v = va_arg(ap, int);
@@ -338,9 +346,24 @@ _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
                break;
        case TIFFTAG_SAMPLEFORMAT:
                v = va_arg(ap, int);
-               if (v < SAMPLEFORMAT_UINT || SAMPLEFORMAT_VOID < v)
+               if (v < SAMPLEFORMAT_UINT || SAMPLEFORMAT_COMPLEXIEEEFP < v)
                        goto badvalue;
                td->td_sampleformat = (uint16) v;
+
+                /*  Try to fix up the SWAB function for complex data. */
+                if( td->td_sampleformat == SAMPLEFORMAT_COMPLEXINT 
+                    && td->td_bitspersample == 32
+                    && tif->tif_postdecode == _TIFFSwab32BitData )
+                    tif->tif_postdecode = _TIFFSwab16BitData;
+                else if( (td->td_sampleformat == SAMPLEFORMAT_COMPLEXINT 
+                          || td->td_sampleformat == SAMPLEFORMAT_COMPLEXIEEEFP)
+                         && td->td_bitspersample == 64
+                         && tif->tif_postdecode == _TIFFSwab64BitData )
+                    tif->tif_postdecode = _TIFFSwab32BitData;
+                else if( td->td_sampleformat == SAMPLEFORMAT_COMPLEXIEEEFP
+                         && td->td_bitspersample == 128
+                         && tif->tif_postdecode == NULL )
+                    tif->tif_postdecode = _TIFFSwab64BitData;
                break;
        case TIFFTAG_IMAGEDEPTH:
                td->td_imagedepth = va_arg(ap, uint32);
@@ -351,19 +374,43 @@ _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
                        goto badvaluedbl;
                td->td_stonits = d;
                break;
-#if SUBIFD_SUPPORT
+       /* Begin Pixar Tags */
+       case TIFFTAG_PIXAR_IMAGEFULLWIDTH:
+               td->td_imagefullwidth = va_arg(ap, uint32);
+               break;
+       case TIFFTAG_PIXAR_IMAGEFULLLENGTH:
+               td->td_imagefulllength = va_arg(ap, uint32);
+               break;
+       case TIFFTAG_PIXAR_TEXTUREFORMAT:
+               _TIFFsetString(&td->td_textureformat, va_arg(ap, char*));
+               break;
+       case TIFFTAG_PIXAR_WRAPMODES:
+               _TIFFsetString(&td->td_wrapmodes, va_arg(ap, char*));
+               break;
+       case TIFFTAG_PIXAR_FOVCOT:
+               td->td_fovcot = (float) va_arg(ap, dblparam_t);
+               break;
+       case TIFFTAG_PIXAR_MATRIX_WORLDTOSCREEN:
+               _TIFFsetFloatArray(&td->td_matrixWorldToScreen,
+                       va_arg(ap, float*), 16);
+               break;
+       case TIFFTAG_PIXAR_MATRIX_WORLDTOCAMERA:
+               _TIFFsetFloatArray(&td->td_matrixWorldToCamera,
+                       va_arg(ap, float*), 16);
+               break;
+       /* End Pixar Tags */           
+
        case TIFFTAG_SUBIFD:
                if ((tif->tif_flags & TIFF_INSUBIFD) == 0) {
                        td->td_nsubifd = (uint16) va_arg(ap, int);
                        _TIFFsetLongArray(&td->td_subifd, va_arg(ap, uint32*),
                            (long) td->td_nsubifd);
                } else {
-                       TIFFError(tif->tif_name, "Sorry, cannot nest SubIFDs");
+                       TIFFError(module, "%s: Sorry, cannot nest SubIFDs",
+                                 tif->tif_name);
                        status = 0;
                }
                break;
-#endif
-#ifdef YCBCR_SUPPORT
        case TIFFTAG_YCBCRCOEFFICIENTS:
                _TIFFsetFloatArray(&td->td_ycbcrcoeffs, va_arg(ap, float*), 3);
                break;
@@ -374,8 +421,6 @@ _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
                td->td_ycbcrsubsampling[0] = (uint16) va_arg(ap, int);
                td->td_ycbcrsubsampling[1] = (uint16) va_arg(ap, int);
                break;
-#endif
-#ifdef COLORIMETRY_SUPPORT
        case TIFFTAG_WHITEPOINT:
                _TIFFsetFloatArray(&td->td_whitepoint, va_arg(ap, float*), 2);
                break;
@@ -392,8 +437,6 @@ _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
                /* XXX should check for null range */
                _TIFFsetFloatArray(&td->td_refblackwhite, va_arg(ap, float*), 6);
                break;
-#endif
-#ifdef CMYK_SUPPORT
        case TIFFTAG_INKSET:
                td->td_inkset = (uint16) va_arg(ap, int);
                break;
@@ -418,71 +461,160 @@ _TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
        case TIFFTAG_TARGETPRINTER:
                _TIFFsetString(&td->td_targetprinter, va_arg(ap, char*));
                break;
-#endif
-#ifdef ICC_SUPPORT
        case TIFFTAG_ICCPROFILE:
                td->td_profileLength = (uint32) va_arg(ap, uint32);
                _TIFFsetByteArray(&td->td_profileData, va_arg(ap, void*),
                    td->td_profileLength);
                break;
-#endif
-#ifdef PHOTOSHOP_SUPPORT
        case TIFFTAG_PHOTOSHOP:
                td->td_photoshopLength = (uint32) va_arg(ap, uint32);
                _TIFFsetByteArray (&td->td_photoshopData, va_arg(ap, void*),
                        td->td_photoshopLength);
                break;
-#endif
-#ifdef IPTC_SUPPORT
-    case TIFFTAG_RICHTIFFIPTC: 
+       case TIFFTAG_RICHTIFFIPTC: 
                td->td_richtiffiptcLength = (uint32) va_arg(ap, uint32);
-#ifdef PHOTOSHOP_SUPPORT
-               _TIFFsetLongArray ((uint32**)&td->td_richtiffiptcData, va_arg(ap, uint32*),
-                       td->td_richtiffiptcLength);
-#else
-               _TIFFsetByteArray (&td->td_photoshopData, va_arg(ap, void*),
-                       td->td_photoshopLength);
-#endif
+               _TIFFsetLongArray ((uint32**)&td->td_richtiffiptcData,
+                                  va_arg(ap, uint32*),
+                                  td->td_richtiffiptcLength);
                break;
-#endif
-       default:
-               /*
-                * This can happen if multiple images are open with
-                * different codecs which have private tags.  The
-                * global tag information table may then have tags
-                * that are valid for one file but not the other. 
-                * If the client tries to set a tag that is not valid
-                * for the image's codec then we'll arrive here.  This
-                * happens, for example, when tiffcp is used to convert
-                * between compression schemes and codec-specific tags
-                * are blindly copied.
-                */
-               TIFFError("TIFFSetField",
+       case TIFFTAG_XMLPACKET:
+               td->td_xmlpacketLength = (uint32) va_arg(ap, uint32);
+               _TIFFsetByteArray(&td->td_xmlpacketData, va_arg(ap, void*),
+                   td->td_xmlpacketLength);
+               break;
+        default: {
+            const TIFFFieldInfo* fip = _TIFFFindFieldInfo(tif, tag, TIFF_ANY);
+            TIFFTagValue *tv;
+            int           tv_size, iCustom;
+
+            /*
+             * This can happen if multiple images are open with
+             * different codecs which have private tags.  The
+             * global tag information table may then have tags
+             * that are valid for one file but not the other. 
+             * If the client tries to set a tag that is not valid
+             * for the image's codec then we'll arrive here.  This
+             * happens, for example, when tiffcp is used to convert
+             * between compression schemes and codec-specific tags
+             * are blindly copied.
+             */
+            if( fip == NULL || fip->field_bit != FIELD_CUSTOM )
+            {
+               TIFFError(module,
                    "%s: Invalid %stag \"%s\" (not supported by codec)",
-                   tif->tif_name, isPseudoTag(tag) ? "pseduo-" : "",
+                   tif->tif_name, isPseudoTag(tag) ? "pseudo-" : "",
                    _TIFFFieldWithTag(tif, tag)->field_name);
                status = 0;
                break;
+            }
+
+            /*
+             * Find the existing entry for this custom value.
+             */
+            tv = NULL;
+            for( iCustom = 0; iCustom < td->td_customValueCount; iCustom++ )
+            {
+                if( td->td_customValues[iCustom].info == fip )
+                {
+                    tv = td->td_customValues + iCustom;
+                    if( tv->value != NULL )
+                        _TIFFfree( tv->value );
+                    break;
+                }
+            }
+
+            /*
+             * Grow the custom list if the entry was not found.
+             */
+            if( tv == NULL )
+            {
+               TIFFTagValue    *new_customValues;
+               
+               td->td_customValueCount++;
+               new_customValues = (TIFFTagValue *)
+                       _TIFFrealloc(td->td_customValues,
+                                    sizeof(TIFFTagValue) * td->td_customValueCount);
+               if (!new_customValues) {
+                       TIFFError(module,
+               "%s: Failed to allocate space for list of custom values",
+                                 tif->tif_name);
+                       status = 0;
+                       goto end;
+               }
+
+               td->td_customValues = new_customValues;
+
+                tv = td->td_customValues + (td->td_customValueCount-1);
+                tv->info = fip;
+                tv->value = NULL;
+                tv->count = 0;
+            }
+
+            /*
+             * Set custom value ... save a copy of the custom tag value.
+             */
+            tv_size = TIFFDataWidth(fip->field_type);
+            if( fip->field_passcount )
+                tv->count = (int) va_arg(ap, int);
+            else
+                tv->count = 1;
+            if( fip->field_passcount )
+            {
+                tv->value = _TIFFmalloc(tv_size * tv->count);
+               if ( !tv->value ) {
+                       va_end(ap);
+                       return 0;
+               }
+                _TIFFmemcpy( tv->value, (void *) va_arg(ap,void*),
+                             tv->count * tv_size );
+            }
+            else if( fip->field_type == TIFF_ASCII )
+            {
+                const char *value = (const char *) va_arg(ap,const char *);
+                tv->count = strlen(value)+1;
+                tv->value = _TIFFmalloc(tv->count);
+               if ( !tv->value ) {
+                       va_end(ap);
+                       return 0;
+               }
+                strcpy( tv->value, value );
+            }
+            else
+            {
+                /* not supporting "pass by value" types yet */
+               TIFFWarning(module, " ... pass by value not implemented.");
+
+                tv->value = _TIFFmalloc(tv_size * tv->count);
+               if ( !tv->value ) {
+                       va_end(ap);
+                       return 0;
+               }
+                _TIFFmemset( tv->value, 0, tv->count * tv_size );
+                status = 0;
+            }
+          }
        }
        if (status) {
-               TIFFSetFieldBit(tif, _TIFFFieldWithTag(tif, tag)->field_bit);
-               tif->tif_flags |= TIFF_DIRTYDIRECT;
+            TIFFSetFieldBit(tif, _TIFFFieldWithTag(tif, tag)->field_bit);
+            tif->tif_flags |= TIFF_DIRTYDIRECT;
        }
+
+end:
        va_end(ap);
        return (status);
 badvalue:
-       TIFFError(tif->tif_name, "%d: Bad value for \"%s\"", v,
-           _TIFFFieldWithTag(tif, tag)->field_name);
+       TIFFError(module, "%.1000s: Bad value %d for \"%s\"",
+                 tif->tif_name, v, _TIFFFieldWithTag(tif, tag)->field_name);
        va_end(ap);
        return (0);
 badvalue32:
-       TIFFError(tif->tif_name, "%ld: Bad value for \"%s\"", v32,
-           _TIFFFieldWithTag(tif, tag)->field_name);
+       TIFFError(module, "%.1000s: Bad value %ld for \"%s\"",
+                  tif->tif_name, v32, _TIFFFieldWithTag(tif, tag)->field_name);
        va_end(ap);
        return (0);
 badvaluedbl:
-       TIFFError(tif->tif_name, "%f: Bad value for \"%s\"", d,
-           _TIFFFieldWithTag(tif, tag)->field_name);
+       TIFFError(module, "%.1000s: Bad value %f for \"%s\"",
+                 tif->tif_name, d, _TIFFFieldWithTag(tif, tag)->field_name);
        va_end(ap);
        return (0);
 }
@@ -550,257 +682,312 @@ int
 TIFFVSetField(TIFF* tif, ttag_t tag, va_list ap)
 {
        return OkToChangeTag(tif, tag) ?
-           (*tif->tif_vsetfield)(tif, tag, ap) : 0;
+           (*tif->tif_tagmethods.vsetfield)(tif, tag, ap) : 0;
 }
 
 static int
 _TIFFVGetField(TIFF* tif, ttag_t tag, va_list ap)
 {
-       TIFFDirectory* td = &tif->tif_dir;
+    TIFFDirectory* td = &tif->tif_dir;
+    int            ret_val = 1;
 
-       switch (tag) {
+    switch (tag) {
        case TIFFTAG_SUBFILETYPE:
-               *va_arg(ap, uint32*) = td->td_subfiletype;
-               break;
+            *va_arg(ap, uint32*) = td->td_subfiletype;
+            break;
        case TIFFTAG_IMAGEWIDTH:
-               *va_arg(ap, uint32*) = td->td_imagewidth;
-               break;
+            *va_arg(ap, uint32*) = td->td_imagewidth;
+            break;
        case TIFFTAG_IMAGELENGTH:
-               *va_arg(ap, uint32*) = td->td_imagelength;
-               break;
+            *va_arg(ap, uint32*) = td->td_imagelength;
+            break;
        case TIFFTAG_BITSPERSAMPLE:
-               *va_arg(ap, uint16*) = td->td_bitspersample;
-               break;
+            *va_arg(ap, uint16*) = td->td_bitspersample;
+            break;
        case TIFFTAG_COMPRESSION:
-               *va_arg(ap, uint16*) = td->td_compression;
-               break;
+            *va_arg(ap, uint16*) = td->td_compression;
+            break;
        case TIFFTAG_PHOTOMETRIC:
-               *va_arg(ap, uint16*) = td->td_photometric;
-               break;
+            *va_arg(ap, uint16*) = td->td_photometric;
+            break;
        case TIFFTAG_THRESHHOLDING:
-               *va_arg(ap, uint16*) = td->td_threshholding;
-               break;
+            *va_arg(ap, uint16*) = td->td_threshholding;
+            break;
        case TIFFTAG_FILLORDER:
-               *va_arg(ap, uint16*) = td->td_fillorder;
-               break;
+            *va_arg(ap, uint16*) = td->td_fillorder;
+            break;
        case TIFFTAG_DOCUMENTNAME:
-               *va_arg(ap, char**) = td->td_documentname;
-               break;
+            *va_arg(ap, char**) = td->td_documentname;
+            break;
        case TIFFTAG_ARTIST:
-               *va_arg(ap, char**) = td->td_artist;
-               break;
+            *va_arg(ap, char**) = td->td_artist;
+            break;
        case TIFFTAG_DATETIME:
-               *va_arg(ap, char**) = td->td_datetime;
-               break;
+            *va_arg(ap, char**) = td->td_datetime;
+            break;
        case TIFFTAG_HOSTCOMPUTER:
-               *va_arg(ap, char**) = td->td_hostcomputer;
-               break;
+            *va_arg(ap, char**) = td->td_hostcomputer;
+            break;
        case TIFFTAG_IMAGEDESCRIPTION:
-               *va_arg(ap, char**) = td->td_imagedescription;
-               break;
+            *va_arg(ap, char**) = td->td_imagedescription;
+            break;
        case TIFFTAG_MAKE:
-               *va_arg(ap, char**) = td->td_make;
-               break;
+            *va_arg(ap, char**) = td->td_make;
+            break;
        case TIFFTAG_MODEL:
-               *va_arg(ap, char**) = td->td_model;
-               break;
-       case TIFFTAG_SOFTWARE:
-               *va_arg(ap, char**) = td->td_software;
-               break;
+            *va_arg(ap, char**) = td->td_model;
+            break;
+       case TIFFTAG_COPYRIGHT:
+            *va_arg(ap, char**) = td->td_copyright;
+            break;
        case TIFFTAG_ORIENTATION:
-               *va_arg(ap, uint16*) = td->td_orientation;
-               break;
+            *va_arg(ap, uint16*) = td->td_orientation;
+            break;
        case TIFFTAG_SAMPLESPERPIXEL:
-               *va_arg(ap, uint16*) = td->td_samplesperpixel;
-               break;
+            *va_arg(ap, uint16*) = td->td_samplesperpixel;
+            break;
        case TIFFTAG_ROWSPERSTRIP:
-               *va_arg(ap, uint32*) = td->td_rowsperstrip;
-               break;
+            *va_arg(ap, uint32*) = td->td_rowsperstrip;
+            break;
        case TIFFTAG_MINSAMPLEVALUE:
-               *va_arg(ap, uint16*) = td->td_minsamplevalue;
-               break;
+            *va_arg(ap, uint16*) = td->td_minsamplevalue;
+            break;
        case TIFFTAG_MAXSAMPLEVALUE:
-               *va_arg(ap, uint16*) = td->td_maxsamplevalue;
-               break;
+            *va_arg(ap, uint16*) = td->td_maxsamplevalue;
+            break;
        case TIFFTAG_SMINSAMPLEVALUE:
-               *va_arg(ap, double*) = td->td_sminsamplevalue;
-               break;
+            *va_arg(ap, double*) = td->td_sminsamplevalue;
+            break;
        case TIFFTAG_SMAXSAMPLEVALUE:
-               *va_arg(ap, double*) = td->td_smaxsamplevalue;
-               break;
+            *va_arg(ap, double*) = td->td_smaxsamplevalue;
+            break;
        case TIFFTAG_XRESOLUTION:
-               *va_arg(ap, float*) = td->td_xresolution;
-               break;
+            *va_arg(ap, float*) = td->td_xresolution;
+            break;
        case TIFFTAG_YRESOLUTION:
-               *va_arg(ap, float*) = td->td_yresolution;
-               break;
+            *va_arg(ap, float*) = td->td_yresolution;
+            break;
        case TIFFTAG_PLANARCONFIG:
-               *va_arg(ap, uint16*) = td->td_planarconfig;
-               break;
+            *va_arg(ap, uint16*) = td->td_planarconfig;
+            break;
        case TIFFTAG_XPOSITION:
-               *va_arg(ap, float*) = td->td_xposition;
-               break;
+            *va_arg(ap, float*) = td->td_xposition;
+            break;
        case TIFFTAG_YPOSITION:
-               *va_arg(ap, float*) = td->td_yposition;
-               break;
+            *va_arg(ap, float*) = td->td_yposition;
+            break;
        case TIFFTAG_PAGENAME:
-               *va_arg(ap, char**) = td->td_pagename;
-               break;
+            *va_arg(ap, char**) = td->td_pagename;
+            break;
        case TIFFTAG_RESOLUTIONUNIT:
-               *va_arg(ap, uint16*) = td->td_resolutionunit;
-               break;
+            *va_arg(ap, uint16*) = td->td_resolutionunit;
+            break;
        case TIFFTAG_PAGENUMBER:
-               *va_arg(ap, uint16*) = td->td_pagenumber[0];
-               *va_arg(ap, uint16*) = td->td_pagenumber[1];
-               break;
+            *va_arg(ap, uint16*) = td->td_pagenumber[0];
+            *va_arg(ap, uint16*) = td->td_pagenumber[1];
+            break;
        case TIFFTAG_HALFTONEHINTS:
-               *va_arg(ap, uint16*) = td->td_halftonehints[0];
-               *va_arg(ap, uint16*) = td->td_halftonehints[1];
-               break;
+            *va_arg(ap, uint16*) = td->td_halftonehints[0];
+            *va_arg(ap, uint16*) = td->td_halftonehints[1];
+            break;
        case TIFFTAG_COLORMAP:
-               *va_arg(ap, uint16**) = td->td_colormap[0];
-               *va_arg(ap, uint16**) = td->td_colormap[1];
-               *va_arg(ap, uint16**) = td->td_colormap[2];
-               break;
+            *va_arg(ap, uint16**) = td->td_colormap[0];
+            *va_arg(ap, uint16**) = td->td_colormap[1];
+            *va_arg(ap, uint16**) = td->td_colormap[2];
+            break;
        case TIFFTAG_STRIPOFFSETS:
        case TIFFTAG_TILEOFFSETS:
-               *va_arg(ap, uint32**) = td->td_stripoffset;
-               break;
+            *va_arg(ap, uint32**) = td->td_stripoffset;
+            break;
        case TIFFTAG_STRIPBYTECOUNTS:
        case TIFFTAG_TILEBYTECOUNTS:
-               *va_arg(ap, uint32**) = td->td_stripbytecount;
-               break;
+            *va_arg(ap, uint32**) = td->td_stripbytecount;
+            break;
        case TIFFTAG_MATTEING:
-               *va_arg(ap, uint16*) =
-                   (td->td_extrasamples == 1 &&
-                    td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
-               break;
+            *va_arg(ap, uint16*) =
+                (td->td_extrasamples == 1 &&
+                 td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
+            break;
        case TIFFTAG_EXTRASAMPLES:
-               *va_arg(ap, uint16*) = td->td_extrasamples;
-               *va_arg(ap, uint16**) = td->td_sampleinfo;
-               break;
+            *va_arg(ap, uint16*) = td->td_extrasamples;
+            *va_arg(ap, uint16**) = td->td_sampleinfo;
+            break;
        case TIFFTAG_TILEWIDTH:
-               *va_arg(ap, uint32*) = td->td_tilewidth;
-               break;
+            *va_arg(ap, uint32*) = td->td_tilewidth;
+            break;
        case TIFFTAG_TILELENGTH:
-               *va_arg(ap, uint32*) = td->td_tilelength;
-               break;
+            *va_arg(ap, uint32*) = td->td_tilelength;
+            break;
        case TIFFTAG_TILEDEPTH:
-               *va_arg(ap, uint32*) = td->td_tiledepth;
-               break;
+            *va_arg(ap, uint32*) = td->td_tiledepth;
+            break;
        case TIFFTAG_DATATYPE:
-               switch (td->td_sampleformat) {
+            switch (td->td_sampleformat) {
                case SAMPLEFORMAT_UINT:
-                       *va_arg(ap, uint16*) = DATATYPE_UINT;
-                       break;
+                    *va_arg(ap, uint16*) = DATATYPE_UINT;
+                    break;
                case SAMPLEFORMAT_INT:
-                       *va_arg(ap, uint16*) = DATATYPE_INT;
-                       break;
+                    *va_arg(ap, uint16*) = DATATYPE_INT;
+                    break;
                case SAMPLEFORMAT_IEEEFP:
-                       *va_arg(ap, uint16*) = DATATYPE_IEEEFP;
-                       break;
+                    *va_arg(ap, uint16*) = DATATYPE_IEEEFP;
+                    break;
                case SAMPLEFORMAT_VOID:
-                       *va_arg(ap, uint16*) = DATATYPE_VOID;
-                       break;
-               }
-               break;
+                    *va_arg(ap, uint16*) = DATATYPE_VOID;
+                    break;
+            }
+            break;
        case TIFFTAG_SAMPLEFORMAT:
-               *va_arg(ap, uint16*) = td->td_sampleformat;
-               break;
+            *va_arg(ap, uint16*) = td->td_sampleformat;
+            break;
        case TIFFTAG_IMAGEDEPTH:
-               *va_arg(ap, uint32*) = td->td_imagedepth;
-               break;
+            *va_arg(ap, uint32*) = td->td_imagedepth;
+            break;
        case TIFFTAG_STONITS:
-               *va_arg(ap, double*) = td->td_stonits;
-               break;
-#if SUBIFD_SUPPORT
+            *va_arg(ap, double*) = td->td_stonits;
+            break;
        case TIFFTAG_SUBIFD:
-               *va_arg(ap, uint16*) = td->td_nsubifd;
-               *va_arg(ap, uint32**) = td->td_subifd;
-               break;
-#endif
-#ifdef YCBCR_SUPPORT
+            *va_arg(ap, uint16*) = td->td_nsubifd;
+            *va_arg(ap, uint32**) = td->td_subifd;
+            break;
        case TIFFTAG_YCBCRCOEFFICIENTS:
-               *va_arg(ap, float**) = td->td_ycbcrcoeffs;
-               break;
+            *va_arg(ap, float**) = td->td_ycbcrcoeffs;
+            break;
        case TIFFTAG_YCBCRPOSITIONING:
-               *va_arg(ap, uint16*) = td->td_ycbcrpositioning;
-               break;
+            *va_arg(ap, uint16*) = td->td_ycbcrpositioning;
+            break;
        case TIFFTAG_YCBCRSUBSAMPLING:
-               *va_arg(ap, uint16*) = td->td_ycbcrsubsampling[0];
-               *va_arg(ap, uint16*) = td->td_ycbcrsubsampling[1];
-               break;
-#endif
-#ifdef COLORIMETRY_SUPPORT
+            *va_arg(ap, uint16*) = td->td_ycbcrsubsampling[0];
+            *va_arg(ap, uint16*) = td->td_ycbcrsubsampling[1];
+            break;
        case TIFFTAG_WHITEPOINT:
-               *va_arg(ap, float**) = td->td_whitepoint;
-               break;
+            *va_arg(ap, float**) = td->td_whitepoint;
+            break;
        case TIFFTAG_PRIMARYCHROMATICITIES:
-               *va_arg(ap, float**) = td->td_primarychromas;
-               break;
+            *va_arg(ap, float**) = td->td_primarychromas;
+            break;
        case TIFFTAG_TRANSFERFUNCTION:
-               *va_arg(ap, uint16**) = td->td_transferfunction[0];
-               if (td->td_samplesperpixel - td->td_extrasamples > 1) {
-                       *va_arg(ap, uint16**) = td->td_transferfunction[1];
-                       *va_arg(ap, uint16**) = td->td_transferfunction[2];
-               }
-               break;
+            *va_arg(ap, uint16**) = td->td_transferfunction[0];
+            if (td->td_samplesperpixel - td->td_extrasamples > 1) {
+                *va_arg(ap, uint16**) = td->td_transferfunction[1];
+                *va_arg(ap, uint16**) = td->td_transferfunction[2];
+            }
+            break;
        case TIFFTAG_REFERENCEBLACKWHITE:
-               *va_arg(ap, float**) = td->td_refblackwhite;
-               break;
-#endif
-#ifdef CMYK_SUPPORT
+            *va_arg(ap, float**) = td->td_refblackwhite;
+            break;
        case TIFFTAG_INKSET:
-               *va_arg(ap, uint16*) = td->td_inkset;
-               break;
+            *va_arg(ap, uint16*) = td->td_inkset;
+            break;
        case TIFFTAG_DOTRANGE:
-               *va_arg(ap, uint16*) = td->td_dotrange[0];
-               *va_arg(ap, uint16*) = td->td_dotrange[1];
-               break;
+            *va_arg(ap, uint16*) = td->td_dotrange[0];
+            *va_arg(ap, uint16*) = td->td_dotrange[1];
+            break;
        case TIFFTAG_INKNAMES:
-               *va_arg(ap, char**) = td->td_inknames;
-               break;
+            *va_arg(ap, char**) = td->td_inknames;
+            break;
        case TIFFTAG_NUMBEROFINKS:
-               *va_arg(ap, uint16*) = td->td_ninks;
-               break;
+            *va_arg(ap, uint16*) = td->td_ninks;
+            break;
        case TIFFTAG_TARGETPRINTER:
-               *va_arg(ap, char**) = td->td_targetprinter;
-               break;
-#endif
-#ifdef ICC_SUPPORT
+            *va_arg(ap, char**) = td->td_targetprinter;
+            break;
        case TIFFTAG_ICCPROFILE:
-               *va_arg(ap, uint32*) = td->td_profileLength;
-               *va_arg(ap, void**) = td->td_profileData;
-               break;
-#endif
-#ifdef PHOTOSHOP_SUPPORT
+            *va_arg(ap, uint32*) = td->td_profileLength;
+            *va_arg(ap, void**) = td->td_profileData;
+            break;
        case TIFFTAG_PHOTOSHOP:
-               *va_arg(ap, uint32*) = td->td_photoshopLength;
-               *va_arg(ap, void**) = td->td_photoshopData;
-               break;
-#endif
-#ifdef IPTC_SUPPORT
+            *va_arg(ap, uint32*) = td->td_photoshopLength;
+            *va_arg(ap, void**) = td->td_photoshopData;
+            break;
        case TIFFTAG_RICHTIFFIPTC:
-               *va_arg(ap, uint32*) = td->td_richtiffiptcLength;
-               *va_arg(ap, void**) = td->td_richtiffiptcData;
-               break;
-#endif
-       default:
-               /*
-                * This can happen if multiple images are open with
-                * different codecs which have private tags.  The
-                * global tag information table may then have tags
-                * that are valid for one file but not the other. 
-                * If the client tries to get a tag that is not valid
-                * for the image's codec then we'll arrive here.
-                */
-               TIFFError("TIFFGetField",
-                   "%s: Invalid %stag \"%s\" (not supported by codec)",
-                   tif->tif_name, isPseudoTag(tag) ? "pseudo-" : "",
-                   _TIFFFieldWithTag(tif, tag)->field_name);
-               break;
-       }
-       return (1);
+            *va_arg(ap, uint32*) = td->td_richtiffiptcLength;
+            *va_arg(ap, void**) = td->td_richtiffiptcData;
+            break;
+       case TIFFTAG_XMLPACKET:
+            *va_arg(ap, uint32*) = td->td_xmlpacketLength;
+            *va_arg(ap, void**) = td->td_xmlpacketData;
+            break;
+            /* Begin Pixar Tags */
+       case TIFFTAG_PIXAR_IMAGEFULLWIDTH:
+            *va_arg(ap, uint32*) = td->td_imagefullwidth;
+            break;
+       case TIFFTAG_PIXAR_IMAGEFULLLENGTH:
+            *va_arg(ap, uint32*) = td->td_imagefulllength;
+            break;
+       case TIFFTAG_PIXAR_TEXTUREFORMAT:
+            *va_arg(ap, char**) = td->td_textureformat;
+            break;
+       case TIFFTAG_PIXAR_WRAPMODES:
+            *va_arg(ap, char**) = td->td_wrapmodes;
+            break;
+       case TIFFTAG_PIXAR_FOVCOT:
+            *va_arg(ap, float*) = td->td_fovcot;
+            break;
+       case TIFFTAG_PIXAR_MATRIX_WORLDTOSCREEN:
+            *va_arg(ap, float**) = td->td_matrixWorldToScreen;
+            break;
+       case TIFFTAG_PIXAR_MATRIX_WORLDTOCAMERA:
+            *va_arg(ap, float**) = td->td_matrixWorldToCamera;
+            break;
+            /* End Pixar Tags */
+
+        default:
+        {
+            const TIFFFieldInfo* fip = _TIFFFindFieldInfo(tif, tag, TIFF_ANY);
+            int           i;
+            
+            /*
+             * This can happen if multiple images are open with
+             * different codecs which have private tags.  The
+             * global tag information table may then have tags
+             * that are valid for one file but not the other. 
+             * If the client tries to get a tag that is not valid
+             * for the image's codec then we'll arrive here.
+             */
+            if( fip == NULL || fip->field_bit != FIELD_CUSTOM )
+            {
+                TIFFError("_TIFFVGetField",
+                          "%s: Invalid %stag \"%s\" (not supported by codec)",
+                          tif->tif_name, isPseudoTag(tag) ? "pseudo-" : "",
+                          _TIFFFieldWithTag(tif, tag)->field_name);
+                ret_val = 0;
+                break;
+            }
+
+            /*
+            ** Do we have a custom value?
+            */
+            ret_val = 0;
+            for( i = 0; i < td->td_customValueCount; i++ )
+            {
+                TIFFTagValue *tv = td->td_customValues + i;
+
+                if( tv->info->field_tag != tag )
+                    continue;
+                
+                if( fip->field_passcount )
+                {
+                    *va_arg(ap, u_short *) = (u_short) tv->count;
+                    *va_arg(ap, void **) = tv->value;
+                    ret_val = 1;
+                    break;
+                }
+                else if( fip->field_type == TIFF_ASCII )
+                {
+                    *va_arg(ap, void **) = tv->value;
+                    ret_val = 1;
+                    break;
+                }
+                else
+                {
+                    printf( "TIFFVGetField ... pass by value not imp.\n" );
+                    break;
+                }
+            }
+        }
+    }
+    return( ret_val );
 }
 
 /*
@@ -830,7 +1017,7 @@ TIFFVGetField(TIFF* tif, ttag_t tag, va_list ap)
 {
        const TIFFFieldInfo* fip = _TIFFFindFieldInfo(tif, tag, TIFF_ANY);
        return (fip && (isPseudoTag(tag) || TIFFFieldSet(tif, fip->field_bit)) ?
-           (*tif->tif_vgetfield)(tif, tag, ap) : 0);
+           (*tif->tif_tagmethods.vgetfield)(tif, tag, ap) : 0);
 }
 
 #define        CleanupField(member) {          \
@@ -846,50 +1033,52 @@ TIFFVGetField(TIFF* tif, ttag_t tag, va_list ap)
 void
 TIFFFreeDirectory(TIFF* tif)
 {
-       register TIFFDirectory *td = &tif->tif_dir;
+    TIFFDirectory *td = &tif->tif_dir;
+    int            i;
+
+    CleanupField(td_colormap[0]);
+    CleanupField(td_colormap[1]);
+    CleanupField(td_colormap[2]);
+    CleanupField(td_documentname);
+    CleanupField(td_artist);
+    CleanupField(td_datetime);
+    CleanupField(td_hostcomputer);
+    CleanupField(td_imagedescription);
+    CleanupField(td_make);
+    CleanupField(td_model);
+    CleanupField(td_copyright);
+    CleanupField(td_pagename);
+    CleanupField(td_sampleinfo);
+    CleanupField(td_subifd);
+    CleanupField(td_ycbcrcoeffs);
+    CleanupField(td_inknames);
+    CleanupField(td_targetprinter);
+    CleanupField(td_whitepoint);
+    CleanupField(td_primarychromas);
+    CleanupField(td_refblackwhite);
+    CleanupField(td_transferfunction[0]);
+    CleanupField(td_transferfunction[1]);
+    CleanupField(td_transferfunction[2]);
+    CleanupField(td_profileData);
+    CleanupField(td_photoshopData);
+    CleanupField(td_richtiffiptcData);
+    CleanupField(td_xmlpacketData);
+    CleanupField(td_stripoffset);
+    CleanupField(td_stripbytecount);
+    /* Begin Pixar Tags */
+    CleanupField(td_textureformat);
+    CleanupField(td_wrapmodes);
+    CleanupField(td_matrixWorldToScreen);
+    CleanupField(td_matrixWorldToCamera);
+    /* End Pixar Tags */
+
+    /* Cleanup custom tag values */
+    for( i = 0; i < td->td_customValueCount; i++ )
+        _TIFFfree( td->td_customValues[i].value );
 
-       CleanupField(td_colormap[0]);
-       CleanupField(td_colormap[1]);
-       CleanupField(td_colormap[2]);
-       CleanupField(td_documentname);
-       CleanupField(td_artist);
-       CleanupField(td_datetime);
-       CleanupField(td_hostcomputer);
-       CleanupField(td_imagedescription);
-       CleanupField(td_make);
-       CleanupField(td_model);
-       CleanupField(td_software);
-       CleanupField(td_pagename);
-       CleanupField(td_sampleinfo);
-#if SUBIFD_SUPPORT
-       CleanupField(td_subifd);
-#endif
-#ifdef YCBCR_SUPPORT
-       CleanupField(td_ycbcrcoeffs);
-#endif
-#ifdef CMYK_SUPPORT
-       CleanupField(td_inknames);
-       CleanupField(td_targetprinter);
-#endif
-#ifdef COLORIMETRY_SUPPORT
-       CleanupField(td_whitepoint);
-       CleanupField(td_primarychromas);
-       CleanupField(td_refblackwhite);
-       CleanupField(td_transferfunction[0]);
-       CleanupField(td_transferfunction[1]);
-       CleanupField(td_transferfunction[2]);
-#endif
-#ifdef ICC_SUPPORT
-       CleanupField(td_profileData);
-#endif
-#ifdef PHOTOSHOP_SUPPORT
-       CleanupField(td_photoshopData);
-#endif
-#ifdef IPTC_SUPPORT
-       CleanupField(td_richtiffiptcData);
-#endif
-       CleanupField(td_stripoffset);
-       CleanupField(td_stripbytecount);
+    if( td->td_customValues != NULL )
+        _TIFFfree( td->td_customValues );
+          
 }
 #undef CleanupField
 
@@ -906,6 +1095,26 @@ TIFFSetTagExtender(TIFFExtendProc extender)
        return (prev);
 }
 
+/*
+ * Setup for a new directory.  Should we automatically call
+ * TIFFWriteDirectory() if the current one is dirty?
+ *
+ * The newly created directory will not exist on the file till
+ * TIFFWriteDirectory(), TIFFFlush() or TIFFClose() is called.
+ */
+int
+TIFFCreateDirectory(TIFF* tif)
+{
+    TIFFDefaultDirectory(tif);
+    tif->tif_diroff = 0;
+    tif->tif_nextdiroff = 0;
+    tif->tif_curoff = 0;
+    tif->tif_row = (uint32) -1;
+    tif->tif_curstrip = (tstrip_t) -1;
+
+    return 0;
+}
+
 /*
  * Setup a default directory structure.
  */
@@ -926,21 +1135,17 @@ TIFFDefaultDirectory(TIFF* tif)
        td->td_tilelength = (uint32) -1;
        td->td_tiledepth = 1;
        td->td_resolutionunit = RESUNIT_INCH;
-       td->td_sampleformat = SAMPLEFORMAT_VOID;
+       td->td_sampleformat = SAMPLEFORMAT_UINT;
        td->td_imagedepth = 1;
-#ifdef YCBCR_SUPPORT
        td->td_ycbcrsubsampling[0] = 2;
        td->td_ycbcrsubsampling[1] = 2;
        td->td_ycbcrpositioning = YCBCRPOSITION_CENTERED;
-#endif
-#ifdef CMYK_SUPPORT
        td->td_inkset = INKSET_CMYK;
        td->td_ninks = 4;
-#endif
        tif->tif_postdecode = _TIFFNoPostDecode;
-       tif->tif_vsetfield = _TIFFVSetField;
-       tif->tif_vgetfield = _TIFFVGetField;
-       tif->tif_printdir = NULL;
+       tif->tif_tagmethods.vsetfield = _TIFFVSetField;
+       tif->tif_tagmethods.vgetfield = _TIFFVGetField;
+       tif->tif_tagmethods.printdir = NULL;
        /*
         *  Give client code a chance to install their own
         *  tag extensions & methods, prior to compression overloads.
@@ -957,37 +1162,73 @@ TIFFDefaultDirectory(TIFF* tif)
         * (i.e. TIFFSetField).
         */
        tif->tif_flags &= ~TIFF_DIRTYDIRECT;
+
+        /*
+         * As per http://bugzilla.remotesensing.org/show_bug.cgi?id=19
+         * we clear the ISTILED flag when setting up a new directory.
+         * Should we also be clearing stuff like INSUBIFD?
+         */
+        tif->tif_flags &= ~TIFF_ISTILED;
+
        return (1);
 }
 
 static int
 TIFFAdvanceDirectory(TIFF* tif, uint32* nextdir, toff_t* off)
 {
-       static const char module[] = "TIFFAdvanceDirectory";
-       uint16 dircount;
-
-       if (!SeekOK(tif, *nextdir) ||
-           !ReadOK(tif, &dircount, sizeof (uint16))) {
-               TIFFError(module, "%s: Error fetching directory count",
-                   tif->tif_name);
-               return (0);
-       }
-       if (tif->tif_flags & TIFF_SWAB)
-               TIFFSwabShort(&dircount);
-       if (off != NULL)
-               *off = TIFFSeekFile(tif,
-                   dircount*sizeof (TIFFDirEntry), SEEK_CUR);
-       else
-               (void) TIFFSeekFile(tif,
-                   dircount*sizeof (TIFFDirEntry), SEEK_CUR);
-       if (!ReadOK(tif, nextdir, sizeof (uint32))) {
-               TIFFError(module, "%s: Error fetching directory link",
-                   tif->tif_name);
-               return (0);
-       }
-       if (tif->tif_flags & TIFF_SWAB)
-               TIFFSwabLong(nextdir);
-       return (1);
+    static const char module[] = "TIFFAdvanceDirectory";
+    uint16 dircount;
+    if (isMapped(tif))
+    {
+        toff_t poff=*nextdir;
+        if (poff+sizeof(uint16) > tif->tif_size)
+        {
+            TIFFError(module, "%s: Error fetching directory count",
+                      tif->tif_name);
+            return (0);
+        }
+        _TIFFmemcpy(&dircount, tif->tif_base+poff, sizeof (uint16));
+        if (tif->tif_flags & TIFF_SWAB)
+            TIFFSwabShort(&dircount);
+        poff+=sizeof (uint16)+dircount*sizeof (TIFFDirEntry);
+        if (off != NULL)
+            *off = poff;
+        if (((toff_t) (poff+sizeof (uint32))) > tif->tif_size)
+        {
+            TIFFError(module, "%s: Error fetching directory link",
+                      tif->tif_name);
+            return (0);
+        }
+        _TIFFmemcpy(nextdir, tif->tif_base+poff, sizeof (uint32));
+        if (tif->tif_flags & TIFF_SWAB)
+            TIFFSwabLong(nextdir);
+        return (1);
+    }
+    else
+    {
+        if (!SeekOK(tif, *nextdir) ||
+            !ReadOK(tif, &dircount, sizeof (uint16))) {
+            TIFFError(module, "%s: Error fetching directory count",
+                      tif->tif_name);
+            return (0);
+        }
+        if (tif->tif_flags & TIFF_SWAB)
+            TIFFSwabShort(&dircount);
+        if (off != NULL)
+            *off = TIFFSeekFile(tif,
+                                dircount*sizeof (TIFFDirEntry), SEEK_CUR);
+        else
+            (void) TIFFSeekFile(tif,
+                                dircount*sizeof (TIFFDirEntry), SEEK_CUR);
+        if (!ReadOK(tif, nextdir, sizeof (uint32))) {
+            TIFFError(module, "%s: Error fetching directory link",
+                      tif->tif_name);
+            return (0);
+        }
+        if (tif->tif_flags & TIFF_SWAB)
+            TIFFSwabLong(nextdir);
+        return (1);
+    }
 }
 
 /*
@@ -996,12 +1237,12 @@ TIFFAdvanceDirectory(TIFF* tif, uint32* nextdir, toff_t* off)
 tdir_t
 TIFFNumberOfDirectories(TIFF* tif)
 {
-       uint32 nextdir = tif->tif_header.tiff_diroff;
-       tdir_t n = 0;
-
-       while (nextdir != 0 && TIFFAdvanceDirectory(tif, &nextdir, NULL))
-               n++;
-       return (n);
+    toff_t nextdir = tif->tif_header.tiff_diroff;
+    tdir_t n = 0;
+    
+    while (nextdir != 0 && TIFFAdvanceDirectory(tif, &nextdir, NULL))
+        n++;
+    return (n);
 }
 
 /*
@@ -1011,7 +1252,7 @@ TIFFNumberOfDirectories(TIFF* tif)
 int
 TIFFSetDirectory(TIFF* tif, tdir_t dirn)
 {
-       uint32 nextdir;
+       toff_t nextdir;
        tdir_t n;
 
        nextdir = tif->tif_header.tiff_diroff;
@@ -1025,6 +1266,11 @@ TIFFSetDirectory(TIFF* tif, tdir_t dirn)
         * tif_curdir after successfully reading the directory.
         */
        tif->tif_curdir = (dirn - n) - 1;
+       /*
+        * Reset tif_dirnumber counter nad start new list of seen directories.
+        * We need this in order to prevent IFD loops.
+        */
+       tif->tif_dirnumber = 0;
        return (TIFFReadDirectory(tif));
 }
 
@@ -1038,6 +1284,11 @@ int
 TIFFSetSubDirectory(TIFF* tif, uint32 diroff)
 {
        tif->tif_nextdiroff = diroff;
+       /*
+        * Reset tif_dirnumber counter nad start new list of seen directories.
+        * We need this in order to prevent IFD loops.
+        */
+       tif->tif_dirnumber = 0;
        return (TIFFReadDirectory(tif));
 }
 
@@ -1067,7 +1318,7 @@ int
 TIFFUnlinkDirectory(TIFF* tif, tdir_t dirn)
 {
        static const char module[] = "TIFFUnlinkDirectory";
-       uint32 nextdir;
+       toff_t nextdir;
        toff_t off;
        tdir_t n;
 
@@ -1174,7 +1425,6 @@ TIFFReassignTagToIgnore (enum TIFFIgnoreSense task, int TIFFtagID)
       case TIS_EMPTY:
         tagcount = 0 ;                 /* Clear the list */
         return (TRUE) ;
-        break;
         
       default:
         break;
@@ -1182,3 +1432,4 @@ TIFFReassignTagToIgnore (enum TIFFIgnoreSense task, int TIFFtagID)
     
     return (FALSE);
 }
+