*** empty log message ***

1 files changed, 14 insertions, 5 deletions

diff --git a/src/lua5/im_fftw.lua b/src/lua5/im_fftw.lua
index e57c7bf..7bae53e 100644
--- a/src/lua5/im_fftw.lua
+++ b/src/lua5/im_fftw.lua
@@ -3,6 +3,7 @@
 -- Creates a new function, with the name suffixed by "New". This new function
 -- creates a new image, based on a source image, and calls the previous function
 -- with this new image.
+-- We assume here that the functions returns only one parameter or none.
 
 local function OneSourceOneDest (funcname, width, height, color_space, data_type)
   local func = im[funcname]
@@ -14,8 +15,12 @@ local function OneSourceOneDest (funcname, width, height, color_space, data_type
     local dst_image = im.ImageCreateBased(src_image, width, height, color_space, data_type)
 
     -- call previous method, repassing all parameters
-    func(src_image, dst_image, unpack(arg))
-    return dst_image
+    local ret = func(src_image, dst_image, unpack(arg))
+    if (ret) then
+      return ret, dst_image
+    else
+      return dst_image
+    end
   end
 end
 
@@ -25,7 +30,7 @@ end
 
 local function TwoSourcesOneDest (funcname, width, height, color_space, data_type)
   local func = im[funcname]
-  
+
   -- see if function is really defined
   assert(func, string.format("undefined function `%s'", funcname))
 
@@ -35,8 +40,12 @@ local function TwoSourcesOneDest (funcname, width, height, color_space, data_typ
     local dst_image = im.ImageCreateBased(src_image1, width, height, color_space, data_type)
 
     -- call previous method, repassing all parameters
-    func(src_image1, src_image2, dst_image, unpack(arg))
-    return dst_image
+    local ret = func(src_image1, src_image2, dst_image, unpack(arg))
+    if (ret) then
+      return ret, dst_image
+    else
+      return dst_image
+    end
   end
 end