| /////////////////////////////////////////////////////////////////////////////////// |
| /// 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); |
| } |
| |
| 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); |
| } |
| |
| 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 |
| |