X-Git-Url: https://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=src%2FMRI.hs;h=d7410912f43ef5431376780e0123f754ac3aeb16;hb=b6ce041d136d56fb3d0638c4abadbae64b94b2e5;hp=094991c2dac537b38e18bd992b7dfe90737ea726;hpb=3544d15ebbd0176c9aac2fd0e0e94468abc56879;p=spline3.git

diff --git a/src/MRI.hs b/src/MRI.hs
index 094991c..d741091 100644
--- a/src/MRI.hs
+++ b/src/MRI.hs
@@ -66,7 +66,8 @@ type ColorData sh = Array U sh RGB
 read_word16s :: FilePath -> IO RawData3D
 read_word16s path = do
   arr <- R.readArrayFromStorableFile path mri_shape
-  now $ R.copyS arr
+  c   <- R.copyP arr
+  now $ c
 
 
 
@@ -123,9 +124,13 @@ write_word16s = R.writeArrayToStorableFile
 
 
 
-values_to_colors :: (Shape sh) => (Values sh) -> (ColorData sh)
+--
+-- Instead of IO, we could get away with a generic monad 'm'
+-- here. However, /we/ only call this function from within IO.
+--
+values_to_colors :: (Shape sh) => (Values sh) -> IO (ColorData sh)
 values_to_colors arr =
-  R.computeS $ R.map (truncate_rgb . ramp_it) arr
+  R.computeUnboxedP $ R.map (truncate_rgb . ramp_it) arr
   where
     ramp_it :: Double -> (Double, Double, Double)
     ramp_it x =
@@ -149,8 +154,9 @@ z_slice n arr =
 
 
 write_values_slice_to_bitmap :: Values2D -> FilePath -> IO ()
-write_values_slice_to_bitmap v3d path =
+write_values_slice_to_bitmap v3d path = do
+  values <- R.computeUnboxedP $ R.map fromIntegral arr_bracketed
+  colors <- values_to_colors $ values
   R.writeImageToBMP path colors
   where
     arr_bracketed = bracket_array v3d
-    colors = values_to_colors $ R.computeS $ R.map fromIntegral arr_bracketed