Initial commit: Final state of the master project

Research/inc/glm/detail/func_packing.inl

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+///////////////////////////////////////////////////////////////////////////////////
+/// 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 core
+/// @file glm/core/func_packing.inl
+/// @date 2010-03-17 / 2011-06-15
+/// @author Christophe Riccio
+///////////////////////////////////////////////////////////////////////////////////
+
+#include "func_common.hpp"
+#include "type_half.hpp"
+#include "../fwd.hpp"
+
+namespace glm
+{
+	GLM_FUNC_QUALIFIER uint packUnorm2x16(vec2 const & v)
+	{
+		u16vec2 Topack(round(clamp(v, 0.0f, 1.0f) * 65535.0f));
+		// return reinterpret_cast<uint&>(Topack);
+    uint* ptr(reinterpret_cast<uint*>(&Topack));
+    return *ptr;
+	}
+
+	GLM_FUNC_QUALIFIER vec2 unpackUnorm2x16(uint const & p)
+	{
+		vec2 Unpack(reinterpret_cast<u16vec2 const &>(p));
+		return Unpack * float(1.5259021896696421759365224689097e-5); // 1.0 / 65535.0
+	}
+
+	GLM_FUNC_QUALIFIER uint packSnorm2x16(vec2 const & v)
+	{
+		i16vec2 Topack(round(clamp(v ,-1.0f, 1.0f) * 32767.0f));
+		// return reinterpret_cast<uint32&>(Topack);
+    uint* ptr(reinterpret_cast<uint*>(&Topack));
+    return *ptr;
+	}
+
+	GLM_FUNC_QUALIFIER vec2 unpackSnorm2x16(uint const & p)
+	{
+		vec2 Unpack(reinterpret_cast<i16vec2 const &>(p));
+		return clamp(
+			Unpack * 3.0518509475997192297128208258309e-5f, //1.0f / 32767.0f,
+			-1.0f, 1.0f);
+	}
+
+	GLM_FUNC_QUALIFIER uint packUnorm4x8(vec4 const & v)
+	{
+		u8vec4 Topack(round(clamp(v, 0.0f, 1.0f) * 255.0f));
+		return reinterpret_cast<uint&>(Topack);
+	}
+
+	GLM_FUNC_QUALIFIER vec4 unpackUnorm4x8(uint const & p)
+	{
+		vec4 Unpack(reinterpret_cast<u8vec4 const&>(p));
+		return Unpack * float(0.0039215686274509803921568627451); // 1 / 255
+	}
+	
+	GLM_FUNC_QUALIFIER uint packSnorm4x8(vec4 const & v)
+	{
+		i8vec4 Topack(round(clamp(v ,-1.0f, 1.0f) * 127.0f));
+		return reinterpret_cast<uint&>(Topack);
+	}
+	
+	GLM_FUNC_QUALIFIER glm::vec4 unpackSnorm4x8(uint const & p)
+	{
+		vec4 Unpack(reinterpret_cast<i8vec4 const &>(p));
+		return clamp(
+			Unpack * 0.0078740157480315f, // 1.0f / 127.0f
+			-1.0f, 1.0f);
+	}
+
+	GLM_FUNC_QUALIFIER double packDouble2x32(uvec2 const & v)
+	{
+		return reinterpret_cast<double const &>(v);
+	}
+
+	GLM_FUNC_QUALIFIER uvec2 unpackDouble2x32(double const & v)
+	{
+		return reinterpret_cast<uvec2 const &>(v);
+	}
+
+	GLM_FUNC_QUALIFIER uint packHalf2x16(vec2 const & v)
+	{
+		i16vec2 Unpack(
+			detail::toFloat16(v.x),
+			detail::toFloat16(v.y));
+
+		uint * Result = reinterpret_cast<uint*>(&Unpack);
+		return *Result;
+	}
+
+	GLM_FUNC_QUALIFIER vec2 unpackHalf2x16(uint const & v)
+	{
+		i16vec2 Unpack(reinterpret_cast<i16vec2 const &>(v));
+	
+		return vec2(
+			detail::toFloat32(Unpack.x), 
+			detail::toFloat32(Unpack.y));
+	}
+}//namespace glm
+