Merge pull request #3 from saurabhb17/master

secondary files

1 files changed, 600 insertions, 0 deletions

diff --git a/include/gal/opengl/glm/gtx/bit.inl b/include/gal/opengl/glm/gtx/bit.inl
new file mode 100644
index 0000000..27647ae
--- /dev/null
+++ b/include/gal/opengl/glm/gtx/bit.inl
@@ -0,0 +1,600 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2007-03-14
+// Updated : 2008-11-14
+// Licence : This source is under MIT License
+// File    : glm/gtx/bit.inl
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace glm
+{
+	template <typename genIType>
+	GLM_FUNC_QUALIFIER genIType mask
+	(
+		genIType const & count
+	)
+	{
+		return ((genIType(1) << (count)) - genIType(1));
+	}
+
+	VECTORIZE_VEC(mask)
+
+	// extractField
+	template <typename genIType>
+	GLM_FUNC_QUALIFIER genIType extractField
+	(
+		half const & value, 
+		genIType const & first, 
+		genIType const & count
+	)
+	{
+		assert(first + count < sizeof(half));
+		return (value._data() << first) >> ((sizeof(half) << 3) - count);
+	}
+
+	template <typename genIType>
+	GLM_FUNC_QUALIFIER genIType extractField
+	(
+		float const & value, 
+		genIType const & first, 
+		genIType const & count
+	)
+	{
+		assert(first + count < sizeof(float));
+		return (detail::uif32(value).i << first) >> ((sizeof(float) << 3) - count);
+	}
+
+	template <typename genIType>
+	GLM_FUNC_QUALIFIER genIType extractField
+	(
+		double const & value, 
+		genIType const & first, 
+		genIType const & count
+	)
+	{
+		assert(first + count < sizeof(double));
+		return (detail::uif64(value).i << first) >> ((sizeof(double) << genIType(3)) - count);
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER genIUType extractField
+	(
+		genIUType const & Value, 
+		sizeType const & First, 
+		sizeType const & Count
+	)
+	{
+		sizeType GenSize = sizeof(genIUType) << 3;
+
+		assert(First + Count <= GenSize);
+
+		genIUType ShiftLeft = Count ? Value << (GenSize - (Count + First)) : 0;
+		genIUType ShiftBack = ShiftLeft >> genIUType(GenSize - Count);
+
+		return ShiftBack;
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec2<genIUType> extractField
+	(
+		detail::tvec2<genIUType> const & value, 
+		sizeType const & first, 
+		sizeType const & count
+	)
+	{
+		return detail::tvec2<genIUType>(
+			extractField(value[0], first, count),
+			extractField(value[1], first, count));
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec3<genIUType> extractField
+	(
+		detail::tvec3<genIUType> const & value, 
+		sizeType const & first, 
+		sizeType const & count
+	)
+	{
+		return detail::tvec3<genIUType>(
+			extractField(value[0], first, count),
+			extractField(value[1], first, count),
+			extractField(value[2], first, count));
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec4<genIUType> extractField
+	(
+		detail::tvec4<genIUType> const & value, 
+		sizeType const & first, 
+		sizeType const & count
+	)
+	{
+		return detail::tvec4<genIUType>(
+			extractField(value[0], first, count),
+			extractField(value[1], first, count),
+			extractField(value[2], first, count),
+			extractField(value[3], first, count));
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec2<genIUType> extractField
+	(
+		detail::tvec2<genIUType> const & value, 
+		detail::tvec2<sizeType> const & first, 
+		detail::tvec2<sizeType> const & count
+	)
+	{
+		return detail::tvec2<genIUType>(
+			extractField(value[0], first[0], count[0]),
+			extractField(value[1], first[1], count[1]));
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec3<genIUType> extractField
+	(
+		detail::tvec3<genIUType> const & value, 
+		detail::tvec3<sizeType> const & first, 
+		detail::tvec3<sizeType> const & count
+	)
+	{
+		return detail::tvec3<genIUType>(
+			extractField(value[0], first[0], count[0]),
+			extractField(value[1], first[1], count[1]),
+			extractField(value[2], first[2], count[2]));
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec4<genIUType> extractField
+	(
+		detail::tvec4<genIUType> const & value, 
+		detail::tvec4<sizeType> const & first, 
+		detail::tvec4<sizeType> const & count
+	)
+	{
+		return detail::tvec4<genIUType>(
+			extractField(value[0], first[0], count[0]),
+			extractField(value[1], first[1], count[1]),
+			extractField(value[2], first[2], count[2]),
+			extractField(value[3], first[3], count[3]));
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec2<genIUType> extractField
+	(
+		genIUType const & value, 
+		detail::tvec2<sizeType> const & first, 
+		detail::tvec2<sizeType> const & count
+	)
+	{
+		return detail::tvec2<genIUType>(
+			extractField(value, first[0], count[0]),
+			extractField(value, first[1], count[1]));
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec3<genIUType> extractField
+	(
+		genIUType const & value, 
+		detail::tvec3<sizeType> const & first, 
+		detail::tvec3<sizeType> const & count
+	)
+	{
+		return detail::tvec3<genIUType>(
+			extractField(value, first[0], count[0]),
+			extractField(value, first[1], count[1]),
+			extractField(value, first[2], count[2]));
+	}
+
+	template <typename genIUType, typename sizeType>
+	GLM_FUNC_QUALIFIER detail::tvec4<genIUType> extractField
+	(
+		genIUType const & value, 
+		detail::tvec4<sizeType> const & first, 
+		detail::tvec4<sizeType> const & count
+	)
+	{
+		return detail::tvec4<genIUType>(
+			extractField(value, first[0], count[0]),
+			extractField(value, first[1], count[1]),
+			extractField(value, first[2], count[2]),
+			extractField(value, first[3], count[3]));
+	}
+
+	// lowestBit
+	template <typename genType>
+	GLM_FUNC_QUALIFIER int lowestBit
+	(
+		genType const & Value
+	)
+	{
+		assert(Value != genType(0)); // not valid call
+
+		genType Bit;
+		for(Bit = genType(0); !(Value & (1 << Bit)); ++Bit){}
+		return Bit;
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec2<int> lowestBit
+	(
+		detail::tvec2<valType> const & value
+	)
+	{
+		return detail::tvec2<int>(
+			lowestBit(value[0]),
+			lowestBit(value[1]));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec3<int> lowestBit
+	(
+		detail::tvec3<valType> const & value
+	)
+	{
+		return detail::tvec3<int>(
+			lowestBit(value[0]),
+			lowestBit(value[1]),
+			lowestBit(value[2]));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec4<int> lowestBit
+	(
+		detail::tvec4<valType> const & value
+	)
+	{
+		return detail::tvec4<int>(
+			lowestBit(value[0]),
+			lowestBit(value[1]),
+			lowestBit(value[2]),
+			lowestBit(value[3]));
+	}
+
+	// highestBit
+	template <typename genType>
+	GLM_FUNC_QUALIFIER int highestBit
+	(
+		genType const & value
+	)
+	{
+		assert(value != genType(0)); // not valid call
+
+		genType bit = genType(-1);
+		for(genType tmp = value; tmp; tmp >>= 1, ++bit){}
+		return bit;
+	}
+
+	//template <>
+	//GLM_FUNC_QUALIFIER int highestBit<int>
+	//(
+	//	int value
+	//)
+	//{
+	//	int bit = -1;
+	//	for(int tmp = value; tmp; tmp >>= 1, ++bit);
+	//	return bit;
+	//}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec2<int> highestBit
+	(
+		detail::tvec2<valType> const & value
+	)
+	{
+		return detail::tvec2<int>(
+			highestBit(value[0]),
+			highestBit(value[1]));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec3<int> highestBit
+	(
+		detail::tvec3<valType> const & value
+	)
+	{
+		return detail::tvec3<int>(
+			highestBit(value[0]),
+			highestBit(value[1]),
+			highestBit(value[2]));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec4<int> highestBit
+	(
+		detail::tvec4<valType> const & value
+	)
+	{
+		return detail::tvec4<int>(
+			highestBit(value[0]),
+			highestBit(value[1]),
+			highestBit(value[2]),
+			highestBit(value[3]));
+	}
+
+	// highestBitValue
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType highestBitValue
+	(
+		genType const & value
+	)
+	{
+		genType tmp = value;
+		genType result = genType(0);
+		while(tmp)
+		{
+			result = (tmp & (~tmp + 1)); // grab lowest bit
+			tmp &= ~result; // clear lowest bit
+		}
+		return result;
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec2<int> highestBitValue
+	(
+		detail::tvec2<valType> const & value
+	)
+	{
+		return detail::tvec2<int>(
+			highestBitValue(value[0]),
+			highestBitValue(value[1]));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec3<int> highestBitValue
+	(
+		detail::tvec3<valType> const & value
+	)
+	{
+		return detail::tvec3<int>(
+			highestBitValue(value[0]),
+			highestBitValue(value[1]),
+			highestBitValue(value[2]));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec4<int> highestBitValue
+	(
+		detail::tvec4<valType> const & value
+	)
+	{
+		return detail::tvec4<int>(
+			highestBitValue(value[0]),
+			highestBitValue(value[1]),
+			highestBitValue(value[2]),
+			highestBitValue(value[3]));
+	}
+
+	// isPowerOfTwo
+	template <typename genType>
+	GLM_FUNC_QUALIFIER bool isPowerOfTwo(genType const & Value)
+	{
+		//detail::If<std::numeric_limits<genType>::is_signed>::apply(abs, Value);
+		//return !(Value & (Value - 1));
+
+		// For old complier?
+		genType Result = Value;
+		if(std::numeric_limits<genType>::is_signed)
+			Result = abs(Result);
+		return !(Result & (Result - 1));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec2<bool> isPowerOfTwo
+	(
+		detail::tvec2<valType> const & value
+	)
+	{
+		return detail::tvec2<bool>(
+			isPowerOfTwo(value[0]),
+			isPowerOfTwo(value[1]));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec3<bool> isPowerOfTwo
+	(
+		detail::tvec3<valType> const & value
+	)
+	{
+		return detail::tvec3<bool>(
+			isPowerOfTwo(value[0]),
+			isPowerOfTwo(value[1]),
+			isPowerOfTwo(value[2]));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec4<bool> isPowerOfTwo
+	(
+		detail::tvec4<valType> const & value
+	)
+	{
+		return detail::tvec4<bool>(
+			isPowerOfTwo(value[0]),
+			isPowerOfTwo(value[1]),
+			isPowerOfTwo(value[2]),
+			isPowerOfTwo(value[3]));
+	}
+
+	// powerOfTwoAbove
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType powerOfTwoAbove(genType const & value)
+	{
+		return isPowerOfTwo(value) ? value : highestBitValue(value) << 1;
+	}
+
+	VECTORIZE_VEC(powerOfTwoAbove)
+
+	// powerOfTwoBelow
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType powerOfTwoBelow
+	(
+		genType const & value
+	)
+	{
+		return isPowerOfTwo(value) ? value : highestBitValue(value);
+	}
+
+	VECTORIZE_VEC(powerOfTwoBelow)
+
+	// powerOfTwoNearest
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType powerOfTwoNearest
+	(
+		genType const & value
+	)
+	{
+		if(isPowerOfTwo(value))
+			return value;
+
+		genType prev = highestBitValue(value);
+		genType next = prev << 1;
+		return (next - value) < (value - prev) ? next : prev;
+	}
+
+	VECTORIZE_VEC(powerOfTwoNearest)
+
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType bitRevert(genType const & In)
+	{
+		GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_integer, "'bitRevert' only accept integer values");
+
+		genType Out = 0;
+		std::size_t BitSize = sizeof(genType) * 8;
+		for(std::size_t i = 0; i < BitSize; ++i)
+			if(In & (genType(1) << i))
+				Out |= genType(1) << (BitSize - 1 - i);
+		return Out;
+	}
+
+	VECTORIZE_VEC(bitRevert)
+
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType bitRotateRight(genType const & In, std::size_t Shift)
+	{
+		GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_integer, "'bitRotateRight' only accept integer values");
+
+		std::size_t BitSize = sizeof(genType) * 8;
+		return (In << Shift) | (In >> (BitSize - Shift));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec2<valType> bitRotateRight
+	(
+		detail::tvec2<valType> const & Value, 
+		std::size_t Shift
+	)
+	{
+		return detail::tvec2<valType>(
+			bitRotateRight(Value[0], Shift),
+			bitRotateRight(Value[1], Shift));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec3<valType> bitRotateRight
+	(
+		detail::tvec3<valType> const & Value, 
+		std::size_t Shift
+	)
+	{
+		return detail::tvec3<valType>(
+			bitRotateRight(Value[0], Shift),
+			bitRotateRight(Value[1], Shift),
+			bitRotateRight(Value[2], Shift));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec4<valType> bitRotateRight
+	(
+		detail::tvec4<valType> const & Value, 
+		std::size_t Shift
+	)
+	{
+		return detail::tvec4<valType>(
+			bitRotateRight(Value[0], Shift),
+			bitRotateRight(Value[1], Shift),
+			bitRotateRight(Value[2], Shift),
+			bitRotateRight(Value[3], Shift));
+	}
+
+	template <typename genType>
+	GLM_FUNC_QUALIFIER genType bitRotateLeft(genType const & In, std::size_t Shift)
+	{
+		GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_integer, "'bitRotateLeft' only accept integer values");
+
+		std::size_t BitSize = sizeof(genType) * 8;
+		return (In >> Shift) | (In << (BitSize - Shift));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec2<valType> bitRotateLeft
+	(
+		detail::tvec2<valType> const & Value, 
+		std::size_t Shift
+	)
+	{
+		return detail::tvec2<valType>(
+			bitRotateLeft(Value[0], Shift),
+			bitRotateLeft(Value[1], Shift));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec3<valType> bitRotateLeft
+	(
+		detail::tvec3<valType> const & Value, 
+		std::size_t Shift
+	)
+	{
+		return detail::tvec3<valType>(
+			bitRotateLeft(Value[0], Shift),
+			bitRotateLeft(Value[1], Shift),
+			bitRotateLeft(Value[2], Shift));
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER detail::tvec4<valType> bitRotateLeft
+	(
+		detail::tvec4<valType> const & Value, 
+		std::size_t Shift
+	)
+	{
+		return detail::tvec4<valType>(
+			bitRotateLeft(Value[0], Shift),
+			bitRotateLeft(Value[1], Shift),
+			bitRotateLeft(Value[2], Shift),
+			bitRotateLeft(Value[3], Shift));
+	}
+
+	template <typename genIUType>
+	GLM_FUNC_QUALIFIER genIUType fillBitfieldWithOne
+	(
+		genIUType const & Value,
+		int const & FromBit, 
+		int const & ToBit
+	)
+	{
+		assert(FromBit <= ToBit);
+		assert(ToBit <= sizeof(genIUType) * std::size_t(8));
+
+		genIUType Result = Value;
+		for(std::size_t i = 0; i <= ToBit; ++i)
+			Result |= (1 << i);
+		return Result;
+	}
+
+	template <typename genIUType>
+	GLM_FUNC_QUALIFIER genIUType fillBitfieldWithZero
+	(
+		genIUType const & Value,
+		int const & FromBit, 
+		int const & ToBit
+	)
+	{
+		assert(FromBit <= ToBit);
+		assert(ToBit <= sizeof(genIUType) * std::size_t(8));
+
+		genIUType Result = Value;
+		for(std::size_t i = 0; i <= ToBit; ++i)
+			Result &= ~(1 << i);
+		return Result;
+	}
+}//namespace glm