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Diffstat (limited to 'include/glm/gtc/integer.inl')
| -rw-r--r-- | include/glm/gtc/integer.inl | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/include/glm/gtc/integer.inl b/include/glm/gtc/integer.inl new file mode 100644 index 0000000..2c4d7c4 --- /dev/null +++ b/include/glm/gtc/integer.inl @@ -0,0 +1,100 @@ +/////////////////////////////////////////////////////////////////////////////////// +/// OpenGL Mathematics (glm.g-truc.net) +/// +/// Copyright (c) 2005 - 2015 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. +/// +/// Restrictions: +/// By making use of the Software for military purposes, you choose to make +/// a Bunny unhappy. +/// +/// 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 +{ + template <typename T, precision P, template <class, precision> class vecType> + struct compute_log2<T, P, vecType, false> + { + GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & vec) + { + //Equivalent to return findMSB(vec); but save one function call in ASM with VC + //return findMSB(vec); + return vecType<T, P>(detail::compute_findMSB_vec<T, P, vecType, sizeof(T) * 8>::call(vec)); + } + }; + +# if GLM_HAS_BITSCAN_WINDOWS + template <precision P> + struct compute_log2<int, P, tvec4, false> + { + GLM_FUNC_QUALIFIER static tvec4<int, P> call(tvec4<int, P> const & vec) + { + tvec4<int, P> Result(glm::uninitialize); + + _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.x), vec.x); + _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.y), vec.y); + _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.z), vec.z); + _BitScanReverse(reinterpret_cast<unsigned long*>(&Result.w), vec.w); + + return Result; + } + }; +# endif//GLM_HAS_BITSCAN_WINDOWS +}//namespace detail + template <typename genType> + GLM_FUNC_QUALIFIER int iround(genType x) + { + GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'iround' only accept floating-point inputs"); + assert(static_cast<genType>(0.0) <= x); + + return static_cast<int>(x + static_cast<genType>(0.5)); + } + + template <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<int, P> iround(vecType<T, P> const& x) + { + GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'iround' only accept floating-point inputs"); + assert(all(lessThanEqual(vecType<T, P>(0), x))); + + return vecType<int, P>(x + static_cast<T>(0.5)); + } + + template <typename genType> + GLM_FUNC_QUALIFIER uint uround(genType x) + { + GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'uround' only accept floating-point inputs"); + assert(static_cast<genType>(0.0) <= x); + + return static_cast<uint>(x + static_cast<genType>(0.5)); + } + + template <typename T, precision P, template <typename, precision> class vecType> + GLM_FUNC_QUALIFIER vecType<uint, P> uround(vecType<T, P> const& x) + { + GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'uround' only accept floating-point inputs"); + assert(all(lessThanEqual(vecType<T, P>(0), x))); + + return vecType<uint, P>(x + static_cast<T>(0.5)); + } +}//namespace glm |