+{-# 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 Values
-import Grid(make_grid, zoom)
-mri_shape :: DIM3
-mri_shape = (Z :. 256 :. 256 :. 109)
+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 = do
- mridata <- read_values_3d mri_shape "./data/mridata.txt"
- let g = make_grid 1 mridata
- let output = zoom g 1
- write_values_1d output "output.txt"
+ 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)