Merge branch 'iqm' into tessallation

src/Importer/IQM/Parser.hs

@@ -196,33 +196,47 @@ skipToCounter a = do
                         put d
 
 -- | Parses an IQM-File and handles back the Haskell-Structure
+--
+--   Does a 2-Pass-Parsing. Reads in Structure on first pass (O(n))and
+--   fills the Structure in a 2nd Pass from Offsets (O(memcpy'd bytes)).
 parseIQM :: String -> IO IQM
 parseIQM a =
 	do
 	f <- B.readFile a
-	putStrLn "Before Parse:"
-	putStrLn $ show f
-	putStrLn "Real Parse:"
-	r <- return $ parse doIQMparse f
-	raw <- case r of
+	-- Parse Headers/Offsets
+	let result = parse doIQMparse f
+	raw <- case result of
 		Done _ x -> return x
 		y -> error $ show y
-	let ret = raw
-	return ret
+	-- Fill Vertex-Arrays with data of Offsets
+	let 	va = vertexArrays raw
+	va' <- mapM (readInVAO f) va
+	return $ raw {
+		vertexArrays = va'
+		}
 
-readInVAO :: IQMVertexArray -> ByteString -> IO IQMVertexArray
-readInVAO (IQMVertexArray type' a format num offset ptr) d = 
+-- | Allocates memory for the Vertex-data and copies it over there
+--   from the given input-String
+--
+--   Note: The String-Operations are O(1), so only O(numberOfCopiedBytes)
+--   is needed in term of computation.
+readInVAO :: ByteString -> IQMVertexArray -> IO IQMVertexArray
+readInVAO d (IQMVertexArray type' a format num offset ptr) = 
 		do
 		let 
-			byteLen = (fromIntegral num)*(vaSize format)
+			byteLen = fromIntegral num * vaSize format
 			data' = skipDrop (fromIntegral offset) byteLen d
 			
-		when (not (ptr == nullPtr)) $ error $ "Error reading Vertex-Array: Double Read of " ++ show type'
+		unless (ptr == nullPtr) $ error $ "Error reading Vertex-Array: Double Read of " ++ show type'
 		p <- mallocBytes byteLen
+		putStrLn $ concat ["Allocating ", show byteLen, " Bytes at ", show p]
 		unsafeUseAsCString data' (\s -> copyBytes p s byteLen)
-		p' <- unsafeCoerce p
-		return (IQMVertexArray type' a format num offset p')
+		return $ IQMVertexArray type' a format num offset $ castPtr p
 		
+-- | Real internal Parser.
+--
+--   Consumes the String only once, thus in O(n). But all Data-Structures are
+--   not allocated and copied. readInVAO has to be called on each one.
 doIQMparse :: Parser IQM
 doIQMparse = 
 	flip evalStateT 0 $ --evaluate parser with state starting at 0
@@ -235,8 +249,6 @@ doIQMparse =
 	        meshes' <- readMeshes $ fromIntegral $ num_meshes h     --read meshes
 		skipToCounter $ ofs_vertexarrays h			--skip 0-n bytes to get to Vertex-Arrays
                 vaf <- readVAFs $ fromIntegral $ num_vertexarrays h     --read Vertex-Arrays
-
-		_ <- lift takeByteString
 	        return IQM
 	                { header = h
 	                , texts = filter (not.null) (split (unsafeCoerce '\0') text)
@@ -244,5 +256,9 @@ doIQMparse =
 			, vertexArrays = vaf
 	                }
 
+-- | Helper-Function for Extracting a random substring out of a Bytestring
+--   by the Offsets provided.
+--
+--   O(1).
 skipDrop :: Int -> Int -> ByteString -> ByteString
 skipDrop a b= B.drop b . B.take a

src/Importer/IQM/Types.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE ExistentialQuantification, RankNTypes, CPP, BangPatterns #-}
+-- {-# LANGUAGE ExistentialQuantification, RankNTypes, CPP, BangPatterns #-}
 -- | Word32 or Word64 - depending on implementation. Format just specifies "uint".
 --   4-Byte in the documentation indicates Word32 - but not specified!
 module Importer.IQM.Types where
@@ -13,7 +13,6 @@ import Graphics.Rendering.OpenGL.Raw.Types
 import Prelude as P
 import Foreign.Storable
 import Foreign.C.Types
-import Foreign.Marshal.Array
 
 -- | Mesh-Indices to distinguish the meshes referenced
 newtype Mesh = Mesh Word32 deriving (Show, Eq)
@@ -21,10 +20,19 @@ newtype Mesh = Mesh Word32 deriving (Show, Eq)
 --   Bytes read for offset-gap reasons
 type CParser a = StateT Int64 Parser a
 
+-- | Alias
 type Flags = GLbitfield      -- ^ Alias for UInt32
+
+-- | Alias
 type Offset = Word32         -- ^ Alias for UInt32
+
+-- | Alias
 type Index = GLuint          -- ^ Alias for UInt32
+
+-- | Alias
 type NumComponents = GLsizei -- ^ Alias for UInt32
+
+-- | Data-BLOB inside IQM
 type IQMData = Ptr IQMVertexArrayFormat -- ^ Pointer for Data
 
 -- | Header of IQM-Format.
@@ -105,7 +113,6 @@ data IQM = IQM
 -- | Different Vertex-Array-Types in IQM
 --
 --   Custom Types have to be > 0x10 as of specification
-
 data IQMVertexArrayType = IQMPosition
                        | IQMTexCoord
                        | IQMNormal
@@ -117,7 +124,6 @@ data IQMVertexArrayType = IQMPosition
                        deriving (Show, Eq)
 
 -- | Lookup-Function for internal enum to VertexArrayFormat
-
 rawEnumToVAT :: Word32 -> CParser IQMVertexArrayType
 rawEnumToVAT 0 = return IQMPosition
 rawEnumToVAT 1 = return IQMTexCoord
@@ -141,6 +147,7 @@ data IQMVertexArrayFormat = IQMbyte
 --                            | Unknown Word32
                        deriving (Show, Eq)
 
+-- | Get the Size (in Bytes) of the given IQMVertexArrayFormat-Struct
 vaSize :: IQMVertexArrayFormat -> Int
 vaSize IQMbyte 		= sizeOf (undefined :: CSChar)
 vaSize IQMubyte 	= sizeOf (undefined :: CUChar)
@@ -148,7 +155,7 @@ vaSize IQMshort 	= sizeOf (undefined :: CShort)
 vaSize IQMushort 	= sizeOf (undefined :: CUShort)
 vaSize IQMint 		= sizeOf (undefined :: CInt)
 vaSize IQMuint 		= sizeOf (undefined :: CUInt)
-vaSize IQMhalf 		= sizeOf (undefined :: Word16) --TODO: Find 16-Bit-Float-Datatype
+vaSize IQMhalf 		= sizeOf (undefined :: Word16) --TODO: Find 16-Bit-Float-Datatype FIXME!
 vaSize IQMfloat 	= sizeOf (undefined :: CFloat)
 vaSize IQMdouble 	= sizeOf (undefined :: CDouble)
 
@@ -157,7 +164,6 @@ vaSize IQMdouble 	= sizeOf (undefined :: CDouble)
 --mallocVArray IQMubyte n	= mallocArray n :: IO (Ptr CUChar)
 
 -- | Lookup-Function for internal enum to VertexArrayFormat
-
 rawEnumToVAF :: Word32 -> CParser IQMVertexArrayFormat
 rawEnumToVAF 0 = return IQMbyte
 rawEnumToVAF 1 = return IQMubyte
@@ -187,10 +193,11 @@ data IQMVertexArray = IQMVertexArray
 			IQMData
                        deriving (Eq)
 instance Show IQMVertexArray where
-    show (IQMVertexArray t fl fo nc off _) = "IQMVertexArray (Type: " ++ show t ++
+    show (IQMVertexArray t fl fo nc off dat) = "IQMVertexArray (Type: " ++ show t ++
                                                         ", Flags: " ++ show fl ++
                                                         ", Format: " ++ show fo ++
                                                         ", NumComponents: " ++ show nc ++
                                                         ", Offset: " ++ show off ++
+							", Data at: " ++ show dat ++ 
                                                         ")"