fixed Gallery Disk Space problem by adding a way to change image density

docs/changelog/7.x.x.txt

@@ -12,6 +12,7 @@
  - fixed: per item shipping
  - fixed: product title problem
  - fixed: adding payment brings me to /
+ - fixed: Gallery uses too much disk space. Added a way to change an images pixel density.
 
 7.5.18
  - fixed: Collateral Image Manager broken in Firefox 3

docs/upgrades/upgrade_7.5.18-7.5.19.pl

@@ -32,6 +32,7 @@ my $session = start(); # this line required
 addNewInboxIndexes( $session );
 updateAddressTable( $session );
 addProductShipping( $session );
+addGalleryImageDensity( $session );
 correctPayDriverReceiptTemplate( $session );
 finish($session); # this line required
 
@@ -45,6 +46,19 @@ finish($session); # this line required
 #    print "DONE!\n" unless $quiet;
 #}
 
+#----------------------------------------------------------------------------
+# Add the image density property to the Gallery
+sub addGalleryImageDensity {
+    my $session = shift;
+    print "\tAdding Image Density to Gallery... " unless $quiet;
+    
+    $session->db->write(
+        "ALTER TABLE Gallery ADD COLUMN imageDensity INT"
+    );
+
+    print "DONE!\n" unless $quiet;
+}
+
 #----------------------------------------------------------------------------
 # Corrects the asset id of the default receipt email template for the PayDriver
 sub correctPayDriverReceiptTemplate{