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120 lines
3.8 KiB
C++
120 lines
3.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net)
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// of this software and associated documentation files (the "Software"), to deal
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/// in the Software without restriction, including without limitation the rights
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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/// copies of the Software, and to permit persons to whom the Software is
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/// furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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///
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/// Restrictions:
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/// By making use of the Software for military purposes, you choose to make
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/// a Bunny unhappy.
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///
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/// THE SOFTWARE.
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///
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/// @ref core
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/// @file glm/detail/func_packing.inl
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/// @date 2010-03-17 / 2011-06-15
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/// @author Christophe Riccio
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///////////////////////////////////////////////////////////////////////////////////
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#include "func_common.hpp"
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#include "type_half.hpp"
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#include "../fwd.hpp"
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namespace glm
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{
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GLM_FUNC_QUALIFIER uint packUnorm2x16(vec2 const & v)
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{
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u16vec2 const Topack(round(clamp(v, 0.0f, 1.0f) * 65535.0f));
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return reinterpret_cast<uint const &>(Topack);
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}
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GLM_FUNC_QUALIFIER vec2 unpackUnorm2x16(uint p)
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{
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vec2 Unpack(reinterpret_cast<u16vec2 const &>(p));
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return Unpack * float(1.5259021896696421759365224689097e-5); // 1.0 / 65535.0
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}
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GLM_FUNC_QUALIFIER uint packSnorm2x16(vec2 const & v)
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{
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i16vec2 const Topack(round(clamp(v ,-1.0f, 1.0f) * 32767.0f));
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return reinterpret_cast<uint const &>(Topack);
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}
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GLM_FUNC_QUALIFIER vec2 unpackSnorm2x16(uint p)
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{
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vec2 const Unpack(reinterpret_cast<i16vec2 const &>(p));
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return clamp(
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Unpack * 3.0518509475997192297128208258309e-5f, //1.0f / 32767.0f,
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-1.0f, 1.0f);
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}
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GLM_FUNC_QUALIFIER uint packUnorm4x8(vec4 const & v)
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{
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u8vec4 const Topack(round(clamp(v, 0.0f, 1.0f) * 255.0f));
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return reinterpret_cast<uint const &>(Topack);
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}
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GLM_FUNC_QUALIFIER vec4 unpackUnorm4x8(uint p)
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{
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vec4 const Unpack(reinterpret_cast<u8vec4 const&>(p));
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return Unpack * float(0.0039215686274509803921568627451); // 1 / 255
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}
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GLM_FUNC_QUALIFIER uint packSnorm4x8(vec4 const & v)
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{
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i8vec4 const Topack(round(clamp(v ,-1.0f, 1.0f) * 127.0f));
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return reinterpret_cast<uint const &>(Topack);
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}
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GLM_FUNC_QUALIFIER glm::vec4 unpackSnorm4x8(uint p)
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{
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vec4 const Unpack(reinterpret_cast<i8vec4 const &>(p));
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return clamp(
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Unpack * 0.0078740157480315f, // 1.0f / 127.0f
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-1.0f, 1.0f);
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}
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GLM_FUNC_QUALIFIER double packDouble2x32(uvec2 const & v)
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{
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return reinterpret_cast<double const &>(v);
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}
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GLM_FUNC_QUALIFIER uvec2 unpackDouble2x32(double v)
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{
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return reinterpret_cast<uvec2 const &>(v);
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}
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GLM_FUNC_QUALIFIER uint packHalf2x16(vec2 const & v)
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{
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i16vec2 const Unpack(
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detail::toFloat16(v.x),
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detail::toFloat16(v.y));
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return reinterpret_cast<uint const &>(Unpack);
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}
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GLM_FUNC_QUALIFIER vec2 unpackHalf2x16(uint v)
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{
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i16vec2 const Unpack(reinterpret_cast<i16vec2 const &>(v));
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return vec2(
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detail::toFloat32(Unpack.x),
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detail::toFloat32(Unpack.y));
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}
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}//namespace glm
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