mirror of
https://github.com/TES3MP/openmw-tes3mp.git
synced 2025-01-31 23:45:32 +00:00
Revert "reworked NIFStream to use a type-handler"
This reverts commit 03ee7663a3.
This commit is contained in:
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parent
7db6447a00
commit
de3c76a54b
1 changed files with 113 additions and 225 deletions
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@ -1,8 +1,6 @@
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#ifndef OPENMW_COMPONENTS_NIF_NIFSTREAM_HPP
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#define OPENMW_COMPONENTS_NIF_NIFSTREAM_HPP
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#include <boost/static_assert.hpp>
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namespace Nif
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{
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@ -13,278 +11,168 @@ class NIFStream {
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/// Input stream
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Ogre::DataStreamPtr inp;
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template <typename value_t>
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value_t read_le ()
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uint8_t read_byte()
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{
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uint8_t buffer [sizeof (value_t)];
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if (inp->read (buffer, sizeof (buffer)) != sizeof (buffer))
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throw std::runtime_error ("unexpected");
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value_t Value = 0;
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value_t Shift = 0;
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for (size_t i = 0; i < sizeof (value_t); ++i)
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{
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Value |= value_t (buffer[i]) << Shift;
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Shift += 8;
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}
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return Value;
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uint8_t byte;
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if(inp->read(&byte, 1) != 1) return 0;
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return byte;
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}
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uint16_t read_le16()
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{
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uint8_t buffer[2];
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if(inp->read(buffer, 2) != 2) return 0;
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return buffer[0] | (buffer[1]<<8);
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}
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uint32_t read_le32()
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{
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uint8_t buffer[4];
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if(inp->read(buffer, 4) != 4) return 0;
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return buffer[0] | (buffer[1]<<8) | (buffer[2]<<16) | (buffer[3]<<24);
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}
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float read_le32f()
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{
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union {
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uint32_t i;
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float f;
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} u = { read_le32() };
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return u.f;
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}
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public:
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/*
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* This should be true for any processor/platform whose endianess, alignment
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* and packing rules would be compatible with x86 and not fault or degrade
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* with misaligned reads. This enables some pretty big savings when reading in
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* animations and meshes.
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*/
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#if defined (__i386__) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64)
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static const bool FileCompatiblePlatform = true;
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#else
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static const bool FileCompatiblePlatform = false;
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#endif
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template <typename type>
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struct handler;
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template <typename presentation_type, typename backing_type>
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struct le_handler;
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template <typename presentation_type, typename backing_type>
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friend struct le_handler;
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template <typename store_type, typename final_type, bool SameLayout>
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struct conversion_handler;
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NIFFile * const file;
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NIFStream (NIFFile * file, Ogre::DataStreamPtr inp) : file (file), inp (inp) {}
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NIFStream (NIFFile * file, Ogre::DataStreamPtr inp): file (file), inp (inp) {}
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/*************************************************
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Parser functions
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****************************************************/
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void skip(size_t size) { return inp->skip (size); }
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size_t read (void * data, size_t size) { return inp->read (data, size); }
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template <typename T>
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struct GetHandler
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{
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typedef T (NIFStream::*fn_t)();
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static const fn_t sValue; // this is specialized per supported type in the .cpp file
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static T read (NIFStream* nif)
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{
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return (nif->*sValue) ();
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}
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};
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template <typename T>
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void uncheckedRead (T & Value)
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void read (NIFStream* nif, T & Value)
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{
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typedef handler <T> handler_t;
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handler_t::extract (*this, Value);
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Value = GetHandler <T>::read (nif);
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}
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template <typename T>
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T getValue ()
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{
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T Value;
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getValue (Value);
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return Value;
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}
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void skip(size_t size) { inp->skip(size); }
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void read (void * data, size_t size) { inp->read (data, size); }
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template <typename T>
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void getValue (T & Value)
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char getChar() { return read_byte(); }
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short getShort() { return read_le16(); }
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unsigned short getUShort() { return read_le16(); }
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int getInt() { return read_le32(); }
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int getUInt() { return read_le32(); }
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float getFloat() { return read_le32f(); }
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Ogre::Vector2 getVector2()
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{
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typedef handler <T> handler_t;
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if (FileCompatiblePlatform && handler_t::FileCompatibleLayout)
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float a[2];
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for(size_t i = 0;i < 2;i++)
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a[i] = getFloat();
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return Ogre::Vector2(a);
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}
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Ogre::Vector3 getVector3()
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{
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float a[3];
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for(size_t i = 0;i < 3;i++)
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a[i] = getFloat();
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return Ogre::Vector3(a);
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}
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Ogre::Vector4 getVector4()
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{
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float a[4];
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for(size_t i = 0;i < 4;i++)
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a[i] = getFloat();
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return Ogre::Vector4(a);
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}
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Ogre::Matrix3 getMatrix3()
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{
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Ogre::Real a[3][3];
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for(size_t i = 0;i < 3;i++)
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{
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BOOST_STATIC_ASSERT_MSG (handler_t::FixedLength, "non-fixed length encoding not supported...");
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BOOST_STATIC_ASSERT_MSG (handler_t::EncodedLength == sizeof (T), "unexpected structure size");
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inp->read (&Value, handler_t::EncodedLength);
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}
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else
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{
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handler_t::extract (*this, Value);
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for(size_t j = 0;j < 3;j++)
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a[i][j] = Ogre::Real(getFloat());
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}
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return Ogre::Matrix3(a);
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}
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template <typename element_type>
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void getArray (element_type * Array, size_t Size)
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Ogre::Quaternion getQuaternion()
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{
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typedef handler <element_type> handler_t;
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if (FileCompatiblePlatform && handler_t::FileCompatibleLayout)
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{
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BOOST_STATIC_ASSERT_MSG (handler_t::FixedLength, "non-fixed length encoding not supported...");
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BOOST_STATIC_ASSERT_MSG (handler_t::EncodedLength == sizeof (element_type), "unexpected structure size");
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inp->read (Array, handler_t::EncodedLength * Size);
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}
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else
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{
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for(size_t i = 0; i < Size; i++)
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handler_t::extract (*this, Array[i]);
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}
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float a[4];
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for(size_t i = 0;i < 4;i++)
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a[i] = getFloat();
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return Ogre::Quaternion(a);
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}
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template <typename element_type, typename allocator_type>
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void getStdVector (std::vector <element_type, allocator_type> & Vector, size_t Size)
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Transformation getTrafo()
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{
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Vector.resize(Size);
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getArray (&Vector.front (), Vector.size ());
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Transformation t;
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t.pos = getVector3();
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t.rotation = getMatrix3();
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t.scale = getFloat();
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return t;
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}
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template <typename length_type, typename element_type, typename allocator_type>
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void getStdVector (std::vector <element_type, allocator_type> & Vector)
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{
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length_type Length;
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getValue (Length);
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getStdVector (Vector, Length);
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}
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char getChar() { return getValue <char> (); }
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signed int getInt() { return getValue <int32_t> (); }
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unsigned int getUInt() { return getValue <uint32_t> (); }
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signed short getShort() { return getValue <int16_t> (); }
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unsigned short getUShort() { return getValue <uint16_t> (); }
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//signed long getLong() { return getValue <signed long> (); }
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//unsigned long getULong() { return getValue <unsigned long> (); }
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float getFloat() { return getValue <float> (); }
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Ogre::Vector2 getVector2() { return getValue <Ogre::Vector2> (); }
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Ogre::Vector3 getVector3() { return getValue <Ogre::Vector3> (); }
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Ogre::Vector4 getVector4() { return getValue <Ogre::Vector4> (); }
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Ogre::Matrix3 getMatrix3() { return getValue <Ogre::Matrix3> (); }
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Ogre::Quaternion getQuaternion() { return getValue <Ogre::Quaternion> (); }
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Transformation getTrafo() { return getValue <Transformation> (); }
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void getShorts(std::vector<short> &vec, size_t size) { return getStdVector (vec, size); }
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void getFloats(std::vector<float> &vec, size_t size) { return getStdVector (vec, size); }
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void getVector2s(std::vector<Ogre::Vector2> &vec, size_t size) { return getStdVector (vec, size); }
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void getVector3s(std::vector<Ogre::Vector3> &vec, size_t size) { return getStdVector (vec, size); }
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void getVector4s(std::vector<Ogre::Vector4> &vec, size_t size) { return getStdVector (vec, size); }
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void getQuaternions(std::vector<Ogre::Quaternion> &vec, size_t size) { return getStdVector (vec, size); }
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std::string getString(size_t length)
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{
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std::vector<char> str (length+1, 0);
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if(read(&str[0], length) != length)
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if(inp->read(&str[0], length) != length)
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throw std::runtime_error ("string length in NIF file does not match");
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return &str[0];
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}
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std::string getString()
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{
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size_t size = getValue <uint32_t> ();
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size_t size = read_le32();
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return getString(size);
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}
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};
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/*
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* generic type handlers
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*/
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template <typename type, size_t Size>
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struct NIFStream::handler < type [Size] >
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{
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typedef handler <type> inner_handler;
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static const bool FixedLength = inner_handler::FixedLength;
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static const size_t EncodedLength = inner_handler::EncodedLength * Size;
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static const bool FileCompatibleLayout = inner_handler::FileCompatibleLayout;
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static void extract (NIFStream & Stream, type (&Value) [Size])
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void getShorts(std::vector<short> &vec, size_t size)
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{
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for (size_t i = 0; i < Size; ++i)
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inner_handler::extract (Stream, Value [i]);
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vec.resize(size);
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for(size_t i = 0;i < vec.size();i++)
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vec[i] = getShort();
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}
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};
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template <typename presentation_type, typename backing_type>
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struct NIFStream::le_handler
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{
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static const bool FixedLength = true;
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static const size_t EncodedLength = sizeof (backing_type);
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static const bool FileCompatibleLayout = true;
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static void extract (NIFStream & Stream, presentation_type & Value)
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void getFloats(std::vector<float> &vec, size_t size)
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{
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BOOST_STATIC_ASSERT_MSG(sizeof (presentation_type) == sizeof (backing_type), "Invalid use of NIFile::le_handler template");
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union {
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backing_type Backing;
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presentation_type Presentation;
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} u;
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u.Backing = Stream.read_le <backing_type> ();
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Value = u.Presentation;
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vec.resize(size);
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for(size_t i = 0;i < vec.size();i++)
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vec[i] = getFloat();
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}
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};
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template <typename store_type, typename final_type>
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struct NIFStream::conversion_handler <store_type, final_type, false>
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{
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typedef handler <store_type> store_handler;
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static const bool FixedLength = store_handler::FixedLength;
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static const size_t EncodedLength = store_handler::EncodedLength;
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static const bool FileCompatibleLayout = false;
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static void extract (NIFStream & Stream, final_type & Value)
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void getVector2s(std::vector<Ogre::Vector2> &vec, size_t size)
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{
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store_type StoreValue;
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store_handler::extract (Stream, StoreValue);
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Value = final_type (StoreValue);
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vec.resize(size);
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for(size_t i = 0;i < vec.size();i++)
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vec[i] = getVector2();
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}
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};
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template <typename store_type, typename final_type>
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struct NIFStream::conversion_handler <store_type, final_type, true>
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{
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typedef handler <store_type> store_handler;
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static const bool FixedLength = store_handler::FixedLength;
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static const size_t EncodedLength = store_handler::EncodedLength;
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static const bool FileCompatibleLayout = store_handler::FileCompatibleLayout;
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static void extract (NIFStream & Stream, final_type & FinalValue)
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void getVector3s(std::vector<Ogre::Vector3> &vec, size_t size)
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{
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store_handler::extract (Stream, reinterpret_cast <store_type &> (FinalValue));
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vec.resize(size);
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for(size_t i = 0;i < vec.size();i++)
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vec[i] = getVector3();
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}
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};
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template <> struct NIFStream::handler <int8_t> : NIFStream::le_handler <int8_t, uint8_t> {};
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template <> struct NIFStream::handler <uint8_t> : NIFStream::le_handler <uint8_t, uint8_t> {};
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template <> struct NIFStream::handler <int16_t> : NIFStream::le_handler <int16_t, uint16_t> {};
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template <> struct NIFStream::handler <uint16_t> : NIFStream::le_handler <uint16_t, uint16_t> {};
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template <> struct NIFStream::handler <int32_t> : NIFStream::le_handler <int32_t, uint32_t> {};
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template <> struct NIFStream::handler <uint32_t> : NIFStream::le_handler <uint32_t, uint32_t> {};
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template <> struct NIFStream::handler <char> : NIFStream::le_handler <char, uint8_t> {};
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template <> struct NIFStream::handler <float> : NIFStream::le_handler <float, uint32_t> {};
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template <> struct NIFStream::handler <Ogre::Vector2> : NIFStream::conversion_handler <float[2], Ogre::Vector2, true> {};
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template <> struct NIFStream::handler <Ogre::Vector3> : NIFStream::conversion_handler <float[3], Ogre::Vector3, true> {};
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template <> struct NIFStream::handler <Ogre::Vector4> : NIFStream::conversion_handler <float[4], Ogre::Vector4, true> {};
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template <> struct NIFStream::handler <Ogre::Matrix3> : NIFStream::conversion_handler <float[3][3], Ogre::Matrix3, true> {};
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template <> struct NIFStream::handler <Ogre::Quaternion> : NIFStream::conversion_handler <float[4], Ogre::Quaternion, true> {};
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template <> struct NIFStream::handler <Transformation>
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{
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static const bool FixedLength = true;
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static const size_t EncodedLength =
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handler <Ogre::Vector3>::EncodedLength +
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handler <Ogre::Matrix3>::EncodedLength +
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handler <Ogre::Real>::EncodedLength;
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static const bool FileCompatibleLayout = true;
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static void extract (NIFStream & stream, Transformation & value)
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void getVector4s(std::vector<Ogre::Vector4> &vec, size_t size)
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{
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stream.uncheckedRead (value.pos);
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stream.uncheckedRead (value.rotation);
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stream.uncheckedRead (value.scale);
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vec.resize(size);
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for(size_t i = 0;i < vec.size();i++)
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vec[i] = getVector4();
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}
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void getQuaternions(std::vector<Ogre::Quaternion> &quat, size_t size)
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{
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quat.resize(size);
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for(size_t i = 0;i < quat.size();i++)
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quat[i] = getQuaternion();
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}
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};
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