From 4d7022e3ed85369f8016ca7547ed310e8ee12a86 Mon Sep 17 00:00:00 2001
From: Tomas Bzatek <tbzatek@users.sourceforge.net>
Date: Thu, 1 Jan 2009 13:33:15 +0100
Subject: Support for adding copyright

---
 generators.c         |  6 ++----
 jpeg-utils.cpp       | 24 ++++++++++++++++++------
 jpeg-utils.h         |  7 +++----
 sample/src/setup.xml |  6 ++++++
 setup.c              |  3 +++
 setup.h              |  1 +
 6 files changed, 33 insertions(+), 14 deletions(-)

diff --git a/generators.c b/generators.c
index d4b0cf9..4e36648 100644
--- a/generators.c
+++ b/generators.c
@@ -163,8 +163,7 @@ generate_image (TGallerySetup *setup,
           if (setup->verbose)  printf ("  done.\n");
         g_free (big_src);
       }
-      if (setup->erase_exif_thumbnail)
-        strip_thumbnail (big_dst);
+      modify_exif (big_dst, setup->erase_exif_thumbnail, setup->add_copyright);
       g_free (big_dst);
 
       if (! item->nofullsize)
@@ -177,8 +176,7 @@ generate_image (TGallerySetup *setup,
           fprintf (stderr, "write_html_index: error copying original image %s\n", img_src_full);
         else
           if (setup->verbose) printf("  done.\n");
-        if (setup->erase_exif_thumbnail)
-          strip_thumbnail (orig_dst);
+        modify_exif (orig_dst, setup->erase_exif_thumbnail, setup->add_copyright);
         g_free (orig_dst);
       }
     }
diff --git a/jpeg-utils.cpp b/jpeg-utils.cpp
index cb06abc..c884ef4 100644
--- a/jpeg-utils.cpp
+++ b/jpeg-utils.cpp
@@ -377,11 +377,17 @@ calculate_sizes (const unsigned long max_width, const unsigned long max_height,
 
 
 /*
- *   strip_thumbnail: strip thumbnail stored in EXIF table
+ *   modify_exif: - strip thumbnail stored in EXIF table
+ *                - add copyright to Exif::Image::Copyright and Iptc::Application2::Copyright
  */
 void
-strip_thumbnail (const char *filename)
+modify_exif (const char *filename, gboolean strip_thumbnail, const char *add_copyright)
 {
+  bool was_modified = false;
+
+  if ((! strip_thumbnail) && (add_copyright == NULL))
+    return;
+
   try
   {
      Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filename);
@@ -389,17 +395,23 @@ strip_thumbnail (const char *filename)
 
      image->readMetadata();
      Exiv2::ExifData &exifData = image->exifData();
-     if (! exifData.empty())  {
+     if (add_copyright) {
+       exifData["Exif.Image.Copyright"] = add_copyright;
+       image->iptcData()["Iptc.Application2.Copyright"] = add_copyright;
+       was_modified = true;
+     }
+     if (strip_thumbnail && (! exifData.empty()))  {
        std::string thumbExt = exifData.thumbnailExtension();
        if (! thumbExt.empty()) {
          exifData.eraseThumbnail();
-         image->writeMetadata();
+         was_modified = true;
        }
      }
+     if (was_modified)
+       image->writeMetadata();
   }
   catch (Exiv2::AnyError& e)
   {
-    fprintf (stderr, "strip_thumbnail: Caught Exiv2 exception: '%s'\n", e.what());
+    fprintf (stderr, "modify_exif: Caught Exiv2 exception: '%s'\n", e.what());
   }
 }
-
diff --git a/jpeg-utils.h b/jpeg-utils.h
index 7d05eab..9b8919f 100644
--- a/jpeg-utils.h
+++ b/jpeg-utils.h
@@ -76,7 +76,6 @@ gboolean resize_image (const char *src, const char *dst,
 void get_image_sizes (const char *img,
                       unsigned long *width, unsigned long *height);
 
-
 /*
  *   calculate_sizes: calculate maximal image sizes within specified limits keeping aspect ratio
  */
@@ -84,10 +83,10 @@ void calculate_sizes (const unsigned long max_width, const unsigned long max_hei
 		              unsigned long *width, unsigned long *height);
 
 /*
- *   strip_thumbnail: strip thumbnail stored in EXIF table
+ *   modify_exif: - strip thumbnail stored in EXIF table
+ *                - add copyright to Exif::Image::Copyright and Iptc::Application2::Copyright
  */
-void strip_thumbnail (const char *filename);
-
+void modify_exif (const char *filename, gboolean strip_thumbnail, const char *add_copyright);
 
 
 #ifdef __cplusplus
diff --git a/sample/src/setup.xml b/sample/src/setup.xml
index 2ebf0d0..22c6823 100644
--- a/sample/src/setup.xml
+++ b/sample/src/setup.xml
@@ -57,6 +57,12 @@
     
     <!--  mandatory site name, part of all page titles  -->
     <site title="CGG Testing Site" />
+    
+    <!--  add your copyright string to every picture                          -->
+    <!--  stored in EXIF::Image::Copyright and IPTC::Application2::Copyright  -->
+    <!--  usual format: "Copyright, John Smith, 19xx. All rights reserved."   -->
+    <add_copyright>This is custom copyright string added to every picture.
+And the second line.</add_copyright>
   </meta>
 
   <footer><![CDATA[
diff --git a/setup.c b/setup.c
index 97f1e3c..0584130 100644
--- a/setup.c
+++ b/setup.c
@@ -128,6 +128,7 @@ parse_setup_xml (const char *filename, TGallerySetup *setup)
   if (s)  g_free (s);
 
   setup->site_title = xml_file_get_node_attribute (xml, "/gallery_setup/meta/site", "title");
+  setup->add_copyright = xml_file_get_node_value (xml, "/gallery_setup/meta/add_copyright/text()");
 
   xml_parser_close (xml);
 
@@ -252,6 +253,8 @@ free_setup_data (TGallerySetup *setup)
         free (setup->border_style);
     if (setup->site_title)
         free (setup->site_title);
+    if (setup->add_copyright)
+        free (setup->add_copyright);
     free (setup);
     setup = NULL;
   }
diff --git a/setup.h b/setup.h
index a90f241..4b2592d 100644
--- a/setup.h
+++ b/setup.h
@@ -60,6 +60,7 @@ typedef struct {
   gboolean erase_exif_thumbnail;
 
   char *site_title;
+  char *add_copyright;
 } TGallerySetup;
 
 
-- 
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