Added GNF stub.

scripts/bimg.lua

@@ -3,6 +3,38 @@
 -- License: https://github.com/bkaradzic/bx#license-bsd-2-clause
 --
 
+function filesexist(_srcPath, _dstPath, _files)
+	for _, file in ipairs(_files) do
+		file = path.getrelative(_srcPath, file)
+		local filePath = path.join(_dstPath, file)
+		if not os.isfile(filePath) then return false end
+	end
+
+	return true
+end
+
+function overridefiles(_srcPath, _dstPath, _files)
+
+	local remove = {}
+	local add = {}
+	for _, file in ipairs(_files) do
+		file = path.getrelative(_srcPath, file)
+		local filePath = path.join(_dstPath, file)
+		if not os.isfile(filePath) then return end
+
+		table.insert(remove, path.join(_srcPath, file))
+		table.insert(add, filePath)
+	end
+
+	removefiles {
+		remove,
+	}
+
+	files {
+		add,
+	}
+end
+
 project "bimg"
 	kind "StaticLib"
 
@@ -16,9 +48,17 @@ project "bimg"
 		path.join(BIMG_DIR, "src/image.*"),
 	}
 
+	overridefiles(BIMG_DIR, path.join(BIMG_DIR, "../bimg-ext"), {
+		path.join(BIMG_DIR, "src/image_gnf.cpp"),
+	})
+
 	configuration { "linux-*" }
 		buildoptions {
 			"-fPIC",
 		}
 
 	configuration {}
+
+	if filesexist(BIMG_DIR, path.join(BIMG_DIR, "../bimg-ext"), { path.join(BIMG_DIR, "scripts/bimg.lua"), }) then
+		dofile(path.join(BIMG_DIR, "../bimg-ext/scripts/bimg.lua") )
+	end