Hardware coloring for itemstacks

Adds the possibility to colorize item stacks based on their metadata.

In the item/node definition you can specify palette (an image file)
and color (fallback color if the item has no palette or metadata).
Then you can add palette_index to the metadata.

Dropped itemstacks with different colors do not merge.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/script/lua_api/l_metadata.cpp b/src/script/lua_api/l_metadata.cpp
index b54005bac..5f4e984cb 100644
--- a/src/script/lua_api/l_metadata.cpp
+++ b/src/script/lua_api/l_metadata.cpp
@@ -250,3 +250,17 @@ bool MetaDataRef::handleFromTable(lua_State *L, int table, Metadata *meta)
 
 	return true;
 }
+
+// equals(self, other)
+int MetaDataRef::l_equals(lua_State *L)
+{
+	MetaDataRef *ref1 = checkobject(L, 1);
+	Metadata *data1 = ref1->getmeta(false);
+	MetaDataRef *ref2 = checkobject(L, 2);
+	Metadata *data2 = ref2->getmeta(false);
+	if (data1 == NULL || data2 == NULL)
+		lua_pushboolean(L, data1 == data2);
+	else
+		lua_pushboolean(L, *data1 == *data2);
+	return 1;
+}