X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=src%2FMain.hs;h=951c9c36bf7a819b51f758de42a158484e00d90b;hb=fc0d3c47103269ed75788a87bb5f28ee70408c89;hp=c8ba34554feb27bb2cd4f0f2d16aa36b0f3bd34a;hpb=518b4b43bfd6c7c1d09841ca3ff5eeae089351ea;p=spline3.git

diff --git a/src/Main.hs b/src/Main.hs
index c8ba345..951c9c3 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -1,27 +1,115 @@
+{-# LANGUAGE RecordWildCards, DoAndIfThenElse #-}
+
 module Main
 where
 
-import Data.Array.Repa (
-  DIM3,
-  Z(..),
-  (:.)(..),
+import Data.Maybe (fromJust)
+import Control.Monad (when)
+import qualified Data.Array.Repa as R
+import Data.Maybe (isJust)
+import GHC.Conc (getNumProcessors, setNumCapabilities)
+import System.IO (hPutStrLn, stderr)
+import System.Exit (exitSuccess, exitWith, ExitCode(..))
+
+import CommandLine (Args(..), apply_args)
+import ExitCodes
+import Grid (zoom)
+import MRI (
+  flip_x,
+  flip_y,
+  read_word16s,
+  round_array,
+  swap_bytes,
+  write_values_slice_to_bitmap,
+  write_word16s,
+  z_slice
   )
 
-import System.Environment (getArgs)
 
-import Values (read_values_3d, write_values_1d)
-import Grid (make_grid, zoom)
+validate_args :: Args -> IO ()
+validate_args Args{..} = do
+  when (scale <= 0) $ do
+    hPutStrLn stderr "ERROR: scale must be greater than zero."
+    exitWith (ExitFailure exit_arg_not_positive)
+
+  when (width <= 0) $ do
+    hPutStrLn stderr "ERROR: width must be greater than zero."
+    exitWith (ExitFailure exit_arg_not_positive)
+
+  when (height <= 0) $ do
+    hPutStrLn stderr "ERROR: height must be greater than zero."
+    exitWith (ExitFailure exit_arg_not_positive)
+
+  when (depth <= 0) $ do
+    hPutStrLn stderr "ERROR: depth must be greater than zero."
+    exitWith (ExitFailure exit_arg_not_positive)
+
+  case slice of
+    Just s ->
+      when (s < 0 || s > depth) $ do
+        hPutStrLn stderr "ERROR: slice must be between zero and depth."
+        exitWith (ExitFailure exit_arg_out_of_bounds)
+    Nothing -> return ()
 
-mri_shape :: DIM3
-mri_shape = (Z :. 256 :. 256 :. 1)
 
 main :: IO ()
 main = do
-  args <- getArgs
-  let color = head args
-  let in_file  = "./data/MRbrain.40." ++ color
-  let out_file = "MRbrain.40." ++ color ++ ".out"
-  mridata <- read_values_3d mri_shape in_file
-  let g = make_grid 1 mridata
-  let output = zoom g (8,8,1)
-  write_values_1d output out_file
+  args@Args{..} <- apply_args
+  -- validate_args will simply exit if there's a problem.
+  validate_args args
+
+  -- The first thing we do is set the number of processors. We get the
+  -- number of processors (cores) in the machine with
+  -- getNumProcessors, and set it with setNumCapabilities. This is so
+  -- we don't have to pass +RTS -Nfoo on the command line every time.
+  num_procs <- getNumProcessors
+  setNumCapabilities num_procs
+
+  -- Determine whether we're doing 2d or 3d. If we're given a slice,
+  -- assume 2d.
+  let mri_shape = (R.Z R.:. depth R.:. height R.:. width) :: R.DIM3
+
+  if (isJust slice) then
+    main2d args mri_shape
+  else
+    main3d args mri_shape
+
+  exitSuccess
+
+  where
+
+
+
+main3d :: Args -> R.DIM3 -> IO ()
+main3d Args{..} mri_shape = do
+  let zoom_factor = (scale, scale, scale)
+  arr <- read_word16s input mri_shape
+  let arr'          = swap_bytes arr
+  let arrMRI        = R.reshape mri_shape arr'
+  dbl_data <- R.computeUnboxedP $ R.map fromIntegral arrMRI
+  raw_output <- zoom dbl_data zoom_factor
+  word16_output <- R.computeUnboxedP $ round_array raw_output
+  write_word16s output word16_output
+
+
+main2d :: Args -> R.DIM3 -> IO ()
+main2d Args{..} mri_shape = do
+  let zoom_factor = (1, scale, scale)
+  arr <- read_word16s input mri_shape
+  arrSlice <- R.computeUnboxedP
+               $ z_slice (fromJust slice)
+               $ flip_x width
+               $ flip_y height
+               $ swap_bytes arr
+  let arrSlice' = R.reshape mri_slice3d arrSlice
+
+  -- If zoom isn't being inlined we need to extract the slice before hand,
+  -- and convert it to the require formed.
+  dbl_data      <- R.computeUnboxedP $ R.map fromIntegral arrSlice'
+  raw_output    <- zoom dbl_data zoom_factor
+  arrSlice0     <- R.computeUnboxedP $ z_slice 0 raw_output
+
+  write_values_slice_to_bitmap arrSlice0 output
+  where
+    mri_slice3d :: R.DIM3
+    mri_slice3d = (R.Z R.:. 1 R.:. height  R.:. width)