Add type exports

2 files changed, 6 insertions, 2 deletions

diff --git a/pfm.cabal b/pfm.cabal
index c36436f..63b292c 100644
--- a/pfm.cabal
+++ b/pfm.cabal
@@ -26,7 +26,7 @@ source-repository head
 library
   hs-source-dirs: src
   default-language: Haskell2010
-  ghc-options: -Wall
+  ghc-options: -Wall -Werror
   exposed-modules: PFM
                  , PFM.Vec
   build-depends: attoparsec
diff --git a/src/PFM.hs b/src/PFM.hs
index f0eff7e..3ec638e 100644
--- a/src/PFM.hs
+++ b/src/PFM.hs
@@ -10,7 +10,11 @@ Portability : POSIX
 Debevec PFM reader
 -}
 
-module PFM ( parse
+module PFM ( PFMImage(..)
+           , PPMImage(..)
+           , PFMColour(..)
+           , PPMColour(..)
+           , parse
            , encode
            , encodePPM
            , module PFM.Vec) where