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Merge branch 'GTC_integer'

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This commit is contained in:
Christophe Riccio
2014-11-21 22:50:00 +01:00
parent 6f8bbecbf5 b0b84a3dc1
commit f98f2b107a
11 changed files with 223 additions and 25 deletions
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12
glm/detail/func_common.inl
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@@ -156,16 +156,20 @@ namespace detail
GLM_FUNC_QUALIFIER genFIType sign(genFIType x)
{
GLM_STATIC_ASSERT(
std::numeric_limits<genFIType>::is_iec559 ||
(std::numeric_limits<genFIType>::is_signed && std::numeric_limits<genFIType>::is_integer), "'sign' only accept signed inputs");
std::numeric_limits<genFIType>::is_iec559 || (std::numeric_limits<genFIType>::is_signed && std::numeric_limits<genFIType>::is_integer),
"'sign' only accept signed inputs");
return genFIType(genFIType(0) < x) - (x < genFIType(0));
return static_cast<genFIType>(static_cast<genFIType>(0) < x) - static_cast<genFIType>(x < static_cast<genFIType>(0));
}
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER vecType<T, P> sign(vecType<T, P> const & x)
{
return detail::functor1<T, T, P, vecType>::call(sign, x);
GLM_STATIC_ASSERT(
std::numeric_limits<T>::is_iec559 || (std::numeric_limits<T>::is_signed && std::numeric_limits<T>::is_integer),
"'sign' only accept signed inputs");
return vecType<T, P>(glm::lessThan(vecType<T, P>(0), x)) - vecType<T, P>(glm::lessThan(x, vecType<T, P>(0)));
}
// floor

65
glm/gtc/integer.hpp Normal file
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@@ -0,0 +1,65 @@
///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
/// Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to deal
/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
/// furnished to do so, subject to the following conditions:
///
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
/// THE SOFTWARE.
///
/// @ref gtc_integer
/// @file glm/gtc/integer.hpp
/// @date 2014-11-17 / 2014-11-17
/// @author Christophe Riccio
///
/// @see core (dependence)
/// @see gtc_integer (dependence)
///
/// @defgroup gtc_integer GLM_GTC_integer
/// @ingroup gtc
///
/// @brief Allow to perform bit operations on integer values
///
/// <glm/gtc/integer.hpp> need to be included to use these functionalities.
///////////////////////////////////////////////////////////////////////////////////
#pragma once
// Dependencies
#include "../detail/setup.hpp"
#include "../detail/precision.hpp"
#include "../detail/func_integer.hpp"
#include "../detail/func_exponential.hpp"
#include <limits>
#if(defined(GLM_MESSAGES) && !defined(GLM_EXT_INCLUDED))
# pragma message("GLM: GLM_GTC_integer extension included")
#endif
namespace glm
{
/// @addtogroup gtc_integer
/// @{
/// Returns the log2 of x. Can be reliably using to compute mipmap count from the texture size.
/// From GLM_GTC_integer extension.
template <typename genIUType>
GLM_FUNC_DECL genIUType log2(genIUType x);
/// @}
} //namespace glm
#include "integer.inl"

47
glm/gtc/integer.inl Normal file
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@@ -0,0 +1,47 @@
///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
/// Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to deal
/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
/// furnished to do so, subject to the following conditions:
///
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
/// THE SOFTWARE.
///
/// @ref gtc_integer
/// @file glm/gtc/integer.inl
/// @date 2014-11-17 / 2014-11-17
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////
namespace glm{
namespace detail
{
GLM_FUNC_QUALIFIER unsigned int nlz(unsigned int x)
{
return 31u - findMSB(x);
}
template <>
struct compute_log2<false>
{
template <typename T>
GLM_FUNC_QUALIFIER T operator() (T const & Value) const
{
return Value <= static_cast<T>(1) ? T(0) : T(32) - nlz(Value - T(1));
}
};
}//namespace detail
}//namespace glm

6
glm/gtx/integer.hpp
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@@ -39,6 +39,7 @@
// Dependency:
#include "../glm.hpp"
#include "../gtc/integer.hpp"
#if(defined(GLM_MESSAGES) && !defined(GLM_EXT_INCLUDED))
# pragma message("GLM: GLM_GTX_integer extension included")
@@ -57,11 +58,6 @@ namespace glm
//! From GLM_GTX_integer extension.
GLM_FUNC_DECL int sqrt(int x);
//! Returns the log2 of x. Can be reliably using to compute mipmap count from the texture size.
//! From GLM_GTX_integer extension.
template <typename genIUType>
GLM_FUNC_DECL genIUType log2(genIUType x);
//! Returns the floor log2 of x.
//! From GLM_GTX_integer extension.
GLM_FUNC_DECL unsigned int floor_log2(unsigned int x);

16
glm/gtx/integer.inl
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@@ -53,21 +53,7 @@ namespace detail
x += (x >> 16);
return(x & 0x0000003f);
}
template <>
struct compute_log2<false>
{
template <typename T>
GLM_FUNC_QUALIFIER T operator() (T const & Value) const
{
#if(GLM_COMPILER & (GLM_COMPILER_VC | GLM_COMPILER_GCC))
return Value <= static_cast<T>(1) ? T(0) : T(32) - nlz(Value - T(1));
#else
return T(32) - nlz(Value - T(1));
#endif
}
};
}//namespace _detail
}//namespace detail
// Henry Gordon Dietz: http://aggregate.org/MAGIC/
/*