Bug 790552 - do not save metadata by default.

This is a privacy concern. Whereas importing metadata is usually a good
idea, exporting it should be a conscious action. A lot of private data
can be leaked through metadata and many people don't realize it (which
also usually means they don't need it). On the other hand, the people
who realize it are the ones who would explicitly edit the metadata and
check what they want to be exported or not.

This is only a first step. Some people may want to always export the
metadata and for these people, there should be abilities to change the
default.

plug-ins/common/file-png.c

@@ -212,9 +212,9 @@ static const PngSaveVals defaults =
   TRUE,
   TRUE,
   9,
-  TRUE,                /* save exif       */
+  FALSE,               /* save exif       */
-  TRUE,                /* save xmp        */
+  FALSE,               /* save xmp        */
-  TRUE,                /* save iptc        */
+  FALSE,               /* save iptc        */
   TRUE,                /* save thumbnail  */
   PNG_FORMAT_AUTO
 };

plug-ins/file-jpeg/jpeg-save.c

@@ -64,10 +64,10 @@ static gboolean arithc_supported = FALSE;
 #define DEFAULT_RESTART_MCU_ROWS 16
 #define DEFAULT_DCT              0
 #define DEFAULT_PREVIEW          FALSE
-#define DEFAULT_EXIF             TRUE
+#define DEFAULT_EXIF             FALSE
 #define DEFAULT_THUMBNAIL        FALSE
-#define DEFAULT_XMP              TRUE
+#define DEFAULT_XMP              FALSE
-#define DEFAULT_IPTC             TRUE
+#define DEFAULT_IPTC             FALSE
 #define DEFAULT_USE_ORIG_QUALITY FALSE
 
 #define JPEG_DEFAULTS_PARASITE  "jpeg-save-defaults"

plug-ins/file-tiff/file-tiff.c

@@ -86,9 +86,9 @@ static TiffSaveVals tsvals =
   COMPRESSION_NONE,    /*  compression         */
   TRUE,                /*  alpha handling      */
   TRUE,                /*  save transp. pixels */
-  TRUE,                /*  save exif           */
+  FALSE,               /*  save exif           */
-  TRUE,                /*  save xmp            */
+  FALSE,               /*  save xmp            */
-  TRUE,                /*  save iptc           */
+  FALSE,               /*  save iptc           */
   TRUE                 /*  save thumbnail      */
 };
 
@@ -362,11 +362,6 @@ run (const gchar      *name,
                                                    "image/tiff",
                                                    &metadata_flags);
 
-      tsvals.save_exif      = (metadata_flags & GIMP_METADATA_SAVE_EXIF) != 0;
-      tsvals.save_xmp       = (metadata_flags & GIMP_METADATA_SAVE_XMP) != 0;
-      tsvals.save_iptc      = (metadata_flags & GIMP_METADATA_SAVE_IPTC) != 0;
-      tsvals.save_thumbnail = (metadata_flags & GIMP_METADATA_SAVE_THUMBNAIL) != 0;
-
       parasite = gimp_image_get_parasite (orig_image, "gimp-comment");
       if (parasite)
         {

plug-ins/file-webp/file-webp.c

@@ -199,9 +199,9 @@ run (const gchar      *name,
           params.kf_distance   = 50;
           params.quality       = 90.0f;
           params.alpha_quality = 100.0f;
-          params.exif          = TRUE;
+          params.exif          = FALSE;
-          params.iptc          = TRUE;
+          params.iptc          = FALSE;
-          params.xmp           = TRUE;
+          params.xmp           = FALSE;
           params.delay         = 200;
           params.force_delay   = FALSE;