+{-# LANGUAGE RecordWildCards, DoAndIfThenElse #-}
+
module Main
where
+import Data.Maybe (fromJust)
+import Control.Monad (when)
import qualified Data.Array.Repa as R
-import System.Environment (getArgs)
+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,
- mri_shape,
- mri_slice3d,
read_word16s,
round_array,
swap_bytes,
z_slice
)
-in_file :: FilePath
-in_file = "./data/mri.bin"
+
+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 ()
main :: IO ()
-main = main3d
+main = do
+ 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
-main3d :: IO ()
-main3d = do
- (s:_) <- getArgs
- let scale = read s :: Int
+ exitSuccess
+
+ where
+
+
+
+main3d :: Args -> R.DIM3 -> IO ()
+main3d Args{..} mri_shape = do
let zoom_factor = (scale, scale, scale)
- let out_file = "output.bin"
- arr <- read_word16s in_file
- let arr' = swap_bytes arr
- let arrMRI = R.reshape mri_shape arr'
- let dbl_data = R.force $ R.map fromIntegral arrMRI
- let output = zoom dbl_data zoom_factor
- let word16_output = round_array output
- write_word16s out_file word16_output
-
-
-main2d :: IO ()
-main2d = do
- (s:_) <- getArgs
- let scale = read s :: Int
+ 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)
- let out_file = "output.bmp"
- arr <- read_word16s in_file
- let arr' = swap_bytes arr
- let arrInv = flip_x $ flip_y arr'
- let arrSlice = z_slice 50 arrInv
+ 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
- let dbl_data = R.map fromIntegral arrSlice'
- let output = zoom dbl_data zoom_factor
- write_values_slice_to_bitmap (z_slice 0 output) out_file
+
+ -- 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)