Use cmdargs to parse command-line arguments.

[spline3.git] / src / Main.hs

diff --git a/src/Main.hs b/src/Main.hs
index 4b375cf57df6d4b0dd0a2d886d3b1154e4e02af0..951c9c36bf7a819b51f758de42a158484e00d90b 100644 (file)
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -1,35 +1,115 @@
+{-# LANGUAGE RecordWildCards, DoAndIfThenElse #-}
+
 module Main
 where
 
-import Data.Array.Repa (
-  Array,
-  DIM1,
-  DIM3,
-  Shape,
-  Z(..),
-  (:.)(..),
-  index,
-  reshape,
-  toList
+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 Data.Array.Repa.IO.Vector (readVectorFromTextFile)
 
---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)
 
-read_mri_data :: IO (Array DIM1 Int)
-read_mri_data = readVectorFromTextFile "./data/mridata.txt"
+  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 :. 109)
 
 main :: IO ()
 main = do
-  mridata <- read_mri_data
-  let mridata2 = reshape mri_shape mridata
-  let tmp = Data.Array.Repa.toList mridata2
-  print tmp
---  let g = make_grid 1 (Data.Array.Repa.toList mridata2)
---  let output = zoom g 2
---  print "Hello, world."
+  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)