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Diffstat (limited to 'include/glm/detail/func_packing.inl')
| -rw-r--r-- | include/glm/detail/func_packing.inl | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/include/glm/detail/func_packing.inl b/include/glm/detail/func_packing.inl new file mode 100644 index 0000000..34953fd --- /dev/null +++ b/include/glm/detail/func_packing.inl @@ -0,0 +1,215 @@ +/////////////////////////////////////////////////////////////////////////////////// +/// 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 core +/// @file glm/detail/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) + { + union + { + u16 in[2]; + uint out; + } u; + + u16vec2 result(round(clamp(v, 0.0f, 1.0f) * 65535.0f)); + + u.in[0] = result[0]; + u.in[1] = result[1]; + + return u.out; + } + + GLM_FUNC_QUALIFIER vec2 unpackUnorm2x16(uint p) + { + union + { + uint in; + u16 out[2]; + } u; + + u.in = p; + + return vec2(u.out[0], u.out[1]) * 1.5259021896696421759365224689097e-5f; + } + + GLM_FUNC_QUALIFIER uint packSnorm2x16(vec2 const & v) + { + union + { + i16 in[2]; + uint out; + } u; + + i16vec2 result(round(clamp(v, -1.0f, 1.0f) * 32767.0f)); + + u.in[0] = result[0]; + u.in[1] = result[1]; + + return u.out; + } + + GLM_FUNC_QUALIFIER vec2 unpackSnorm2x16(uint p) + { + union + { + uint in; + i16 out[2]; + } u; + + u.in = p; + + return clamp(vec2(u.out[0], u.out[1]) * 3.0518509475997192297128208258309e-5f, -1.0f, 1.0f); + } + + GLM_FUNC_QUALIFIER uint packUnorm4x8(vec4 const & v) + { + union + { + u8 in[4]; + uint out; + } u; + + u8vec4 result(round(clamp(v, 0.0f, 1.0f) * 255.0f)); + + u.in[0] = result[0]; + u.in[1] = result[1]; + u.in[2] = result[2]; + u.in[3] = result[3]; + + return u.out; + } + + GLM_FUNC_QUALIFIER vec4 unpackUnorm4x8(uint p) + { + union + { + uint in; + u8 out[4]; + } u; + + u.in = p; + + return vec4(u.out[0], u.out[1], u.out[2], u.out[3]) * 0.0039215686274509803921568627451f; + } + + GLM_FUNC_QUALIFIER uint packSnorm4x8(vec4 const & v) + { + union + { + i8 in[4]; + uint out; + } u; + + i8vec4 result(round(clamp(v, -1.0f, 1.0f) * 127.0f)); + + u.in[0] = result[0]; + u.in[1] = result[1]; + u.in[2] = result[2]; + u.in[3] = result[3]; + + return u.out; + } + + GLM_FUNC_QUALIFIER glm::vec4 unpackSnorm4x8(uint p) + { + union + { + uint in; + i8 out[4]; + } u; + + u.in = p; + + return clamp(vec4(u.out[0], u.out[1], u.out[2], u.out[3]) * 0.0078740157480315f, -1.0f, 1.0f); + } + + GLM_FUNC_QUALIFIER double packDouble2x32(uvec2 const & v) + { + union + { + uint in[2]; + double out; + } u; + + u.in[0] = v[0]; + u.in[1] = v[1]; + + return u.out; + } + + GLM_FUNC_QUALIFIER uvec2 unpackDouble2x32(double v) + { + union + { + double in; + uint out[2]; + } u; + + u.in = v; + + return uvec2(u.out[0], u.out[1]); + } + + GLM_FUNC_QUALIFIER uint packHalf2x16(vec2 const & v) + { + union + { + i16 in[2]; + uint out; + } u; + + u.in[0] = detail::toFloat16(v.x); + u.in[1] = detail::toFloat16(v.y); + + return u.out; + } + + GLM_FUNC_QUALIFIER vec2 unpackHalf2x16(uint v) + { + union + { + uint in; + i16 out[2]; + } u; + + u.in = v; + + return vec2( + detail::toFloat32(u.out[0]), + detail::toFloat32(u.out[1])); + } +}//namespace glm + |