From cf7dc08636a7679fbdfac7a8f7d4af0f78708578 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 11 Jun 2022 16:20:20 -0400
Subject: [PATCH] support date:timestamp property

---
 coders/tiff.c       | 16 ++++++++++------
 magick/constitute.c |  2 ++
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/coders/tiff.c b/coders/tiff.c
index 6fd22e13a1..e278ca7c0a 100644
--- a/coders/tiff.c
+++ b/coders/tiff.c
@@ -3214,6 +3214,16 @@ static MagickBooleanType WriteTIFFImage(const ImageInfo *image_info,
             ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
           }
       }
+    option=GetImageOption(image_info,"quantum:polarity");
+    if (option == (const char *) NULL)
+      option=GetImageArtifact(image,"tiff:photometric");
+    if (option != (const char *) NULL)
+      {
+        if (LocaleCompare(option,"min-is-black") == 0)
+          SetQuantumMinIsWhite(quantum_info,MagickFalse);
+        if (LocaleCompare(option,"min-is-white") == 0)
+          SetQuantumMinIsWhite(quantum_info,MagickTrue);
+      }
     if ((LocaleCompare(image_info->magick,"PTIF") == 0) &&
         (GetPreviousImageInList(image) != (Image *) NULL))
       (void) TIFFSetField(tiff,TIFFTAG_SUBFILETYPE,FILETYPE_REDUCEDIMAGE);
@@ -3227,17 +3237,11 @@ static MagickBooleanType WriteTIFFImage(const ImageInfo *image_info,
       case FaxCompression:
       {
         compress_tag=COMPRESSION_CCITTFAX3;
-        option=GetImageOption(image_info,"quantum:polarity");
-        if (option == (const char *) NULL)
-          SetQuantumMinIsWhite(quantum_info,MagickTrue);
         break;
       }
       case Group4Compression:
       {
         compress_tag=COMPRESSION_CCITTFAX4;
-        option=GetImageOption(image_info,"quantum:polarity");
-        if (option == (const char *) NULL)
-          SetQuantumMinIsWhite(quantum_info,MagickTrue);
         break;
       }
 #if defined(COMPRESSION_JBIG)
diff --git a/magick/constitute.c b/magick/constitute.c
index 6d52f06e14..9984e7683b 100644
--- a/magick/constitute.c
+++ b/magick/constitute.c
@@ -829,6 +829,8 @@ MagickExport Image *ReadImage(const ImageInfo *image_info,
       }
     if (source_date_epoch == (const char *) NULL)
       {
+        (void) FormatMagickTime(GetMagickTime(),MaxTextExtent,timestamp);
+        (void) SetImageProperty(next,"date:timestamp",timestamp);
         (void) FormatMagickTime((time_t) GetBlobProperties(next)->st_mtime,
           MaxTextExtent,timestamp);
         (void) SetImageProperty(next,"date:modify",timestamp);