782 lines
22 KiB
C++
782 lines
22 KiB
C++
/// @ref gtc_packing
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/// @file glm/gtc/packing.inl
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#include "../common.hpp"
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#include "../vec2.hpp"
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#include "../vec3.hpp"
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#include "../vec4.hpp"
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#include "../detail/type_half.hpp"
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#include <cstring>
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#include <limits>
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namespace glm{
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namespace detail
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{
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GLM_FUNC_QUALIFIER glm::uint16 float2half(glm::uint32 f)
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{
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// 10 bits => EE EEEFFFFF
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// 11 bits => EEE EEFFFFFF
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// Half bits => SEEEEEFF FFFFFFFF
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// Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF
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// 0x00007c00 => 00000000 00000000 01111100 00000000
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// 0x000003ff => 00000000 00000000 00000011 11111111
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// 0x38000000 => 00111000 00000000 00000000 00000000
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// 0x7f800000 => 01111111 10000000 00000000 00000000
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// 0x00008000 => 00000000 00000000 10000000 00000000
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return
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((f >> 16) & 0x8000) | // sign
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((((f & 0x7f800000) - 0x38000000) >> 13) & 0x7c00) | // exponential
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((f >> 13) & 0x03ff); // Mantissa
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}
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GLM_FUNC_QUALIFIER glm::uint32 float2packed11(glm::uint32 f)
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{
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// 10 bits => EE EEEFFFFF
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// 11 bits => EEE EEFFFFFF
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// Half bits => SEEEEEFF FFFFFFFF
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// Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF
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// 0x000007c0 => 00000000 00000000 00000111 11000000
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// 0x00007c00 => 00000000 00000000 01111100 00000000
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// 0x000003ff => 00000000 00000000 00000011 11111111
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// 0x38000000 => 00111000 00000000 00000000 00000000
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// 0x7f800000 => 01111111 10000000 00000000 00000000
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// 0x00008000 => 00000000 00000000 10000000 00000000
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return
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((((f & 0x7f800000) - 0x38000000) >> 17) & 0x07c0) | // exponential
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((f >> 17) & 0x003f); // Mantissa
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}
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GLM_FUNC_QUALIFIER glm::uint32 packed11ToFloat(glm::uint32 p)
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{
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// 10 bits => EE EEEFFFFF
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// 11 bits => EEE EEFFFFFF
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// Half bits => SEEEEEFF FFFFFFFF
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// Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF
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// 0x000007c0 => 00000000 00000000 00000111 11000000
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// 0x00007c00 => 00000000 00000000 01111100 00000000
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// 0x000003ff => 00000000 00000000 00000011 11111111
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// 0x38000000 => 00111000 00000000 00000000 00000000
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// 0x7f800000 => 01111111 10000000 00000000 00000000
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// 0x00008000 => 00000000 00000000 10000000 00000000
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return
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((((p & 0x07c0) << 17) + 0x38000000) & 0x7f800000) | // exponential
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((p & 0x003f) << 17); // Mantissa
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}
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GLM_FUNC_QUALIFIER glm::uint32 float2packed10(glm::uint32 f)
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{
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// 10 bits => EE EEEFFFFF
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// 11 bits => EEE EEFFFFFF
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// Half bits => SEEEEEFF FFFFFFFF
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// Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF
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// 0x0000001F => 00000000 00000000 00000000 00011111
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// 0x0000003F => 00000000 00000000 00000000 00111111
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// 0x000003E0 => 00000000 00000000 00000011 11100000
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// 0x000007C0 => 00000000 00000000 00000111 11000000
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// 0x00007C00 => 00000000 00000000 01111100 00000000
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// 0x000003FF => 00000000 00000000 00000011 11111111
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// 0x38000000 => 00111000 00000000 00000000 00000000
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// 0x7f800000 => 01111111 10000000 00000000 00000000
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// 0x00008000 => 00000000 00000000 10000000 00000000
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return
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((((f & 0x7f800000) - 0x38000000) >> 18) & 0x03E0) | // exponential
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((f >> 18) & 0x001f); // Mantissa
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}
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GLM_FUNC_QUALIFIER glm::uint32 packed10ToFloat(glm::uint32 p)
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{
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// 10 bits => EE EEEFFFFF
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// 11 bits => EEE EEFFFFFF
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// Half bits => SEEEEEFF FFFFFFFF
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// Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF
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// 0x0000001F => 00000000 00000000 00000000 00011111
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// 0x0000003F => 00000000 00000000 00000000 00111111
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// 0x000003E0 => 00000000 00000000 00000011 11100000
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// 0x000007C0 => 00000000 00000000 00000111 11000000
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// 0x00007C00 => 00000000 00000000 01111100 00000000
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// 0x000003FF => 00000000 00000000 00000011 11111111
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// 0x38000000 => 00111000 00000000 00000000 00000000
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// 0x7f800000 => 01111111 10000000 00000000 00000000
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// 0x00008000 => 00000000 00000000 10000000 00000000
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return
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((((p & 0x03E0) << 18) + 0x38000000) & 0x7f800000) | // exponential
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((p & 0x001f) << 18); // Mantissa
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}
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GLM_FUNC_QUALIFIER glm::uint half2float(glm::uint h)
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{
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return ((h & 0x8000) << 16) | ((( h & 0x7c00) + 0x1C000) << 13) | ((h & 0x03FF) << 13);
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}
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GLM_FUNC_QUALIFIER glm::uint floatTo11bit(float x)
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{
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if(x == 0.0f)
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return 0u;
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else if(glm::isnan(x))
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return ~0u;
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else if(glm::isinf(x))
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return 0x1Fu << 6u;
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uint Pack = 0u;
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memcpy(&Pack, &x, sizeof(Pack));
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return float2packed11(Pack);
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}
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GLM_FUNC_QUALIFIER float packed11bitToFloat(glm::uint x)
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{
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if(x == 0)
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return 0.0f;
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else if(x == ((1 << 11) - 1))
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return ~0;//NaN
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else if(x == (0x1f << 6))
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return ~0;//Inf
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uint Result = packed11ToFloat(x);
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float Temp = 0;
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memcpy(&Temp, &Result, sizeof(Temp));
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return Temp;
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}
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GLM_FUNC_QUALIFIER glm::uint floatTo10bit(float x)
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{
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if(x == 0.0f)
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return 0u;
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else if(glm::isnan(x))
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return ~0u;
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else if(glm::isinf(x))
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return 0x1Fu << 5u;
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uint Pack = 0;
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memcpy(&Pack, &x, sizeof(Pack));
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return float2packed10(Pack);
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}
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GLM_FUNC_QUALIFIER float packed10bitToFloat(glm::uint x)
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{
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if(x == 0)
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return 0.0f;
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else if(x == ((1 << 10) - 1))
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return ~0;//NaN
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else if(x == (0x1f << 5))
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return ~0;//Inf
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uint Result = packed10ToFloat(x);
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float Temp = 0;
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memcpy(&Temp, &Result, sizeof(Temp));
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return Temp;
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}
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// GLM_FUNC_QUALIFIER glm::uint f11_f11_f10(float x, float y, float z)
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// {
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// return ((floatTo11bit(x) & ((1 << 11) - 1)) << 0) | ((floatTo11bit(y) & ((1 << 11) - 1)) << 11) | ((floatTo10bit(z) & ((1 << 10) - 1)) << 22);
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// }
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union u3u3u2
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{
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struct
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{
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uint x : 3;
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uint y : 3;
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uint z : 2;
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} data;
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uint8 pack;
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};
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union u4u4
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{
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struct
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{
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uint x : 4;
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uint y : 4;
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} data;
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uint8 pack;
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};
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union u4u4u4u4
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{
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struct
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{
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uint x : 4;
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uint y : 4;
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uint z : 4;
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uint w : 4;
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} data;
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uint16 pack;
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};
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union u5u6u5
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{
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struct
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{
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uint x : 5;
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uint y : 6;
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uint z : 5;
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} data;
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uint16 pack;
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};
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union u5u5u5u1
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{
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struct
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{
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uint x : 5;
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uint y : 5;
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uint z : 5;
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uint w : 1;
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} data;
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uint16 pack;
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};
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union u10u10u10u2
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{
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struct
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{
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uint x : 10;
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uint y : 10;
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uint z : 10;
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uint w : 2;
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} data;
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uint32 pack;
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};
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union i10i10i10i2
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{
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struct
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{
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int x : 10;
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int y : 10;
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int z : 10;
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int w : 2;
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} data;
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uint32 pack;
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};
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union u9u9u9e5
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{
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struct
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{
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uint x : 9;
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uint y : 9;
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uint z : 9;
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uint w : 5;
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} data;
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uint32 pack;
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};
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template <precision P, template <typename, precision> class vecType>
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struct compute_half
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{};
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template <precision P>
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struct compute_half<P, tvec1>
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{
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GLM_FUNC_QUALIFIER static tvec1<uint16, P> pack(tvec1<float, P> const & v)
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{
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int16 const Unpack(detail::toFloat16(v.x));
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u16vec1 Packed(uninitialize);
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memcpy(&Packed, &Unpack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER static tvec1<float, P> unpack(tvec1<uint16, P> const & v)
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{
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i16vec1 Unpack(uninitialize);
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memcpy(&Unpack, &v, sizeof(Unpack));
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return tvec1<float, P>(detail::toFloat32(v.x));
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}
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};
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template <precision P>
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struct compute_half<P, tvec2>
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{
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GLM_FUNC_QUALIFIER static tvec2<uint16, P> pack(tvec2<float, P> const & v)
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{
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tvec2<int16, P> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y));
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u16vec2 Packed(uninitialize);
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memcpy(&Packed, &Unpack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER static tvec2<float, P> unpack(tvec2<uint16, P> const & v)
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{
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i16vec2 Unpack(uninitialize);
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memcpy(&Unpack, &v, sizeof(Unpack));
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return tvec2<float, P>(detail::toFloat32(v.x), detail::toFloat32(v.y));
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}
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};
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template <precision P>
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struct compute_half<P, tvec3>
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{
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GLM_FUNC_QUALIFIER static tvec3<uint16, P> pack(tvec3<float, P> const & v)
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{
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tvec3<int16, P> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y), detail::toFloat16(v.z));
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u16vec3 Packed(uninitialize);
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memcpy(&Packed, &Unpack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER static tvec3<float, P> unpack(tvec3<uint16, P> const & v)
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{
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i16vec3 Unpack(uninitialize);
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memcpy(&Unpack, &v, sizeof(Unpack));
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return tvec3<float, P>(detail::toFloat32(v.x), detail::toFloat32(v.y), detail::toFloat32(v.z));
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}
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};
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template <precision P>
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struct compute_half<P, tvec4>
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{
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GLM_FUNC_QUALIFIER static tvec4<uint16, P> pack(tvec4<float, P> const & v)
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{
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tvec4<int16, P> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y), detail::toFloat16(v.z), detail::toFloat16(v.w));
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u16vec4 Packed(uninitialize);
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memcpy(&Packed, &Unpack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER static tvec4<float, P> unpack(tvec4<uint16, P> const & v)
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{
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i16vec4 Unpack(uninitialize);
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memcpy(&Unpack, &v, sizeof(Unpack));
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return tvec4<float, P>(detail::toFloat32(v.x), detail::toFloat32(v.y), detail::toFloat32(v.z), detail::toFloat32(v.w));
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}
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};
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}//namespace detail
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GLM_FUNC_QUALIFIER uint8 packUnorm1x8(float v)
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{
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return static_cast<uint8>(round(clamp(v, 0.0f, 1.0f) * 255.0f));
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}
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GLM_FUNC_QUALIFIER float unpackUnorm1x8(uint8 p)
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{
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float const Unpack(p);
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return Unpack * static_cast<float>(0.0039215686274509803921568627451); // 1 / 255
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}
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GLM_FUNC_QUALIFIER uint16 packUnorm2x8(vec2 const & v)
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{
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u8vec2 const Topack(round(clamp(v, 0.0f, 1.0f) * 255.0f));
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uint16 Unpack = 0;
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memcpy(&Unpack, &Topack, sizeof(Unpack));
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return Unpack;
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}
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GLM_FUNC_QUALIFIER vec2 unpackUnorm2x8(uint16 p)
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{
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u8vec2 Unpack(uninitialize);
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memcpy(&Unpack, &p, sizeof(Unpack));
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return vec2(Unpack) * float(0.0039215686274509803921568627451); // 1 / 255
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}
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GLM_FUNC_QUALIFIER uint8 packSnorm1x8(float v)
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{
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int8 const Topack(static_cast<int8>(round(clamp(v ,-1.0f, 1.0f) * 127.0f)));
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uint8 Packed = 0;
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memcpy(&Packed, &Topack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER float unpackSnorm1x8(uint8 p)
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{
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int8 Unpack = 0;
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memcpy(&Unpack, &p, sizeof(Unpack));
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return clamp(
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static_cast<float>(Unpack) * 0.00787401574803149606299212598425f, // 1.0f / 127.0f
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-1.0f, 1.0f);
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}
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GLM_FUNC_QUALIFIER uint16 packSnorm2x8(vec2 const & v)
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{
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i8vec2 const Topack(round(clamp(v, -1.0f, 1.0f) * 127.0f));
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uint16 Packed = 0;
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memcpy(&Packed, &Topack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER vec2 unpackSnorm2x8(uint16 p)
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{
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i8vec2 Unpack(uninitialize);
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memcpy(&Unpack, &p, sizeof(Unpack));
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return clamp(
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vec2(Unpack) * 0.00787401574803149606299212598425f, // 1.0f / 127.0f
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-1.0f, 1.0f);
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}
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GLM_FUNC_QUALIFIER uint16 packUnorm1x16(float s)
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{
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return static_cast<uint16>(round(clamp(s, 0.0f, 1.0f) * 65535.0f));
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}
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GLM_FUNC_QUALIFIER float unpackUnorm1x16(uint16 p)
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{
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float const Unpack(p);
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return Unpack * 1.5259021896696421759365224689097e-5f; // 1.0 / 65535.0
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}
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GLM_FUNC_QUALIFIER uint64 packUnorm4x16(vec4 const & v)
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{
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u16vec4 const Topack(round(clamp(v , 0.0f, 1.0f) * 65535.0f));
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uint64 Packed = 0;
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memcpy(&Packed, &Topack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER vec4 unpackUnorm4x16(uint64 p)
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{
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u16vec4 Unpack(uninitialize);
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memcpy(&Unpack, &p, sizeof(Unpack));
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return vec4(Unpack) * 1.5259021896696421759365224689097e-5f; // 1.0 / 65535.0
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}
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GLM_FUNC_QUALIFIER uint16 packSnorm1x16(float v)
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{
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int16 const Topack = static_cast<int16>(round(clamp(v ,-1.0f, 1.0f) * 32767.0f));
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uint16 Packed = 0;
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memcpy(&Packed, &Topack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER float unpackSnorm1x16(uint16 p)
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{
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int16 Unpack = 0;
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memcpy(&Unpack, &p, sizeof(Unpack));
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return clamp(
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static_cast<float>(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 uint64 packSnorm4x16(vec4 const & v)
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{
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i16vec4 const Topack(round(clamp(v ,-1.0f, 1.0f) * 32767.0f));
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uint64 Packed = 0;
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memcpy(&Packed, &Topack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER vec4 unpackSnorm4x16(uint64 p)
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{
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i16vec4 Unpack(uninitialize);
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memcpy(&Unpack, &p, sizeof(Unpack));
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return clamp(
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vec4(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 uint16 packHalf1x16(float v)
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{
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int16 const Topack(detail::toFloat16(v));
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uint16 Packed = 0;
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memcpy(&Packed, &Topack, sizeof(Packed));
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return Packed;
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}
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GLM_FUNC_QUALIFIER float unpackHalf1x16(uint16 v)
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{
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int16 Unpack = 0;
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memcpy(&Unpack, &v, sizeof(Unpack));
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return detail::toFloat32(Unpack);
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}
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GLM_FUNC_QUALIFIER uint64 packHalf4x16(glm::vec4 const & v)
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{
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i16vec4 const Unpack(
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detail::toFloat16(v.x),
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detail::toFloat16(v.y),
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detail::toFloat16(v.z),
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detail::toFloat16(v.w));
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uint64 Packed = 0;
|
|
memcpy(&Packed, &Unpack, sizeof(Packed));
|
|
return Packed;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER glm::vec4 unpackHalf4x16(uint64 v)
|
|
{
|
|
i16vec4 Unpack(uninitialize);
|
|
memcpy(&Unpack, &v, sizeof(Unpack));
|
|
return vec4(
|
|
detail::toFloat32(Unpack.x),
|
|
detail::toFloat32(Unpack.y),
|
|
detail::toFloat32(Unpack.z),
|
|
detail::toFloat32(Unpack.w));
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint32 packI3x10_1x2(ivec4 const & v)
|
|
{
|
|
detail::i10i10i10i2 Result;
|
|
Result.data.x = v.x;
|
|
Result.data.y = v.y;
|
|
Result.data.z = v.z;
|
|
Result.data.w = v.w;
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER ivec4 unpackI3x10_1x2(uint32 v)
|
|
{
|
|
detail::i10i10i10i2 Unpack;
|
|
Unpack.pack = v;
|
|
return ivec4(
|
|
Unpack.data.x,
|
|
Unpack.data.y,
|
|
Unpack.data.z,
|
|
Unpack.data.w);
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint32 packU3x10_1x2(uvec4 const & v)
|
|
{
|
|
detail::u10u10u10u2 Result;
|
|
Result.data.x = v.x;
|
|
Result.data.y = v.y;
|
|
Result.data.z = v.z;
|
|
Result.data.w = v.w;
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uvec4 unpackU3x10_1x2(uint32 v)
|
|
{
|
|
detail::u10u10u10u2 Unpack;
|
|
Unpack.pack = v;
|
|
return uvec4(
|
|
Unpack.data.x,
|
|
Unpack.data.y,
|
|
Unpack.data.z,
|
|
Unpack.data.w);
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint32 packSnorm3x10_1x2(vec4 const & v)
|
|
{
|
|
detail::i10i10i10i2 Result;
|
|
Result.data.x = int(round(clamp(v.x,-1.0f, 1.0f) * 511.f));
|
|
Result.data.y = int(round(clamp(v.y,-1.0f, 1.0f) * 511.f));
|
|
Result.data.z = int(round(clamp(v.z,-1.0f, 1.0f) * 511.f));
|
|
Result.data.w = int(round(clamp(v.w,-1.0f, 1.0f) * 1.f));
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec4 unpackSnorm3x10_1x2(uint32 v)
|
|
{
|
|
detail::i10i10i10i2 Unpack;
|
|
Unpack.pack = v;
|
|
vec4 Result;
|
|
Result.x = clamp(float(Unpack.data.x) / 511.f, -1.0f, 1.0f);
|
|
Result.y = clamp(float(Unpack.data.y) / 511.f, -1.0f, 1.0f);
|
|
Result.z = clamp(float(Unpack.data.z) / 511.f, -1.0f, 1.0f);
|
|
Result.w = clamp(float(Unpack.data.w) / 1.f, -1.0f, 1.0f);
|
|
return Result;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint32 packUnorm3x10_1x2(vec4 const & v)
|
|
{
|
|
uvec4 const Unpack(round(clamp(v, 0.0f, 1.0f) * vec4(1023.f, 1023.f, 1023.f, 3.f)));
|
|
|
|
detail::u10u10u10u2 Result;
|
|
Result.data.x = Unpack.x;
|
|
Result.data.y = Unpack.y;
|
|
Result.data.z = Unpack.z;
|
|
Result.data.w = Unpack.w;
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec4 unpackUnorm3x10_1x2(uint32 v)
|
|
{
|
|
vec4 const ScaleFactors(1.0f / 1023.f, 1.0f / 1023.f, 1.0f / 1023.f, 1.0f / 3.f);
|
|
|
|
detail::u10u10u10u2 Unpack;
|
|
Unpack.pack = v;
|
|
return vec4(Unpack.data.x, Unpack.data.y, Unpack.data.z, Unpack.data.w) * ScaleFactors;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint32 packF2x11_1x10(vec3 const & v)
|
|
{
|
|
return
|
|
((detail::floatTo11bit(v.x) & ((1 << 11) - 1)) << 0) |
|
|
((detail::floatTo11bit(v.y) & ((1 << 11) - 1)) << 11) |
|
|
((detail::floatTo10bit(v.z) & ((1 << 10) - 1)) << 22);
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec3 unpackF2x11_1x10(uint32 v)
|
|
{
|
|
return vec3(
|
|
detail::packed11bitToFloat(v >> 0),
|
|
detail::packed11bitToFloat(v >> 11),
|
|
detail::packed10bitToFloat(v >> 22));
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint32 packF3x9_E1x5(vec3 const & v)
|
|
{
|
|
float const SharedExpMax = (pow(2.0f, 9.0f - 1.0f) / pow(2.0f, 9.0f)) * pow(2.0f, 31.f - 15.f);
|
|
vec3 const Color = clamp(v, 0.0f, SharedExpMax);
|
|
float const MaxColor = max(Color.x, max(Color.y, Color.z));
|
|
|
|
float const ExpSharedP = max(-15.f - 1.f, floor(log2(MaxColor))) + 1.0f + 15.f;
|
|
float const MaxShared = floor(MaxColor / pow(2.0f, (ExpSharedP - 15.f - 9.f)) + 0.5f);
|
|
float const ExpShared = MaxShared == pow(2.0f, 9.0f) ? ExpSharedP + 1.0f : ExpSharedP;
|
|
|
|
uvec3 const ColorComp(floor(Color / pow(2.f, (ExpShared - 15.f - 9.f)) + 0.5f));
|
|
|
|
detail::u9u9u9e5 Unpack;
|
|
Unpack.data.x = ColorComp.x;
|
|
Unpack.data.y = ColorComp.y;
|
|
Unpack.data.z = ColorComp.z;
|
|
Unpack.data.w = uint(ExpShared);
|
|
return Unpack.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec3 unpackF3x9_E1x5(uint32 v)
|
|
{
|
|
detail::u9u9u9e5 Unpack;
|
|
Unpack.pack = v;
|
|
|
|
return vec3(Unpack.data.x, Unpack.data.y, Unpack.data.z) * pow(2.0f, Unpack.data.w - 15.f - 9.f);
|
|
}
|
|
|
|
template <precision P, template <typename, precision> class vecType>
|
|
GLM_FUNC_QUALIFIER vecType<uint16, P> packHalf(vecType<float, P> const & v)
|
|
{
|
|
return detail::compute_half<P, vecType>::pack(v);
|
|
}
|
|
|
|
template <precision P, template <typename, precision> class vecType>
|
|
GLM_FUNC_QUALIFIER vecType<float, P> unpackHalf(vecType<uint16, P> const & v)
|
|
{
|
|
return detail::compute_half<P, vecType>::unpack(v);
|
|
}
|
|
|
|
template <typename uintType, typename floatType, precision P, template <typename, precision> class vecType>
|
|
GLM_FUNC_QUALIFIER vecType<uintType, P> packUnorm(vecType<floatType, P> const & v)
|
|
{
|
|
GLM_STATIC_ASSERT(std::numeric_limits<uintType>::is_integer, "uintType must be an integer type");
|
|
GLM_STATIC_ASSERT(std::numeric_limits<floatType>::is_iec559, "floatType must be a floating point type");
|
|
|
|
return vecType<uintType, P>(round(clamp(v, static_cast<floatType>(0), static_cast<floatType>(1)) * static_cast<floatType>(std::numeric_limits<uintType>::max())));
|
|
}
|
|
|
|
template <typename uintType, typename floatType, precision P, template <typename, precision> class vecType>
|
|
GLM_FUNC_QUALIFIER vecType<floatType, P> unpackUnorm(vecType<uintType, P> const & v)
|
|
{
|
|
GLM_STATIC_ASSERT(std::numeric_limits<uintType>::is_integer, "uintType must be an integer type");
|
|
GLM_STATIC_ASSERT(std::numeric_limits<floatType>::is_iec559, "floatType must be a floating point type");
|
|
|
|
return vecType<float, P>(v) * (static_cast<floatType>(1) / static_cast<floatType>(std::numeric_limits<uintType>::max()));
|
|
}
|
|
|
|
template <typename intType, typename floatType, precision P, template <typename, precision> class vecType>
|
|
GLM_FUNC_QUALIFIER vecType<intType, P> packSnorm(vecType<floatType, P> const & v)
|
|
{
|
|
GLM_STATIC_ASSERT(std::numeric_limits<intType>::is_integer, "uintType must be an integer type");
|
|
GLM_STATIC_ASSERT(std::numeric_limits<floatType>::is_iec559, "floatType must be a floating point type");
|
|
|
|
return vecType<intType, P>(round(clamp(v , static_cast<floatType>(-1), static_cast<floatType>(1)) * static_cast<floatType>(std::numeric_limits<intType>::max())));
|
|
}
|
|
|
|
template <typename intType, typename floatType, precision P, template <typename, precision> class vecType>
|
|
GLM_FUNC_QUALIFIER vecType<floatType, P> unpackSnorm(vecType<intType, P> const & v)
|
|
{
|
|
GLM_STATIC_ASSERT(std::numeric_limits<intType>::is_integer, "uintType must be an integer type");
|
|
GLM_STATIC_ASSERT(std::numeric_limits<floatType>::is_iec559, "floatType must be a floating point type");
|
|
|
|
return clamp(vecType<floatType, P>(v) * (static_cast<floatType>(1) / static_cast<floatType>(std::numeric_limits<intType>::max())), static_cast<floatType>(-1), static_cast<floatType>(1));
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint8 packUnorm2x4(vec2 const & v)
|
|
{
|
|
u32vec2 const Unpack(round(clamp(v, 0.0f, 1.0f) * 15.0f));
|
|
detail::u4u4 Result;
|
|
Result.data.x = Unpack.x;
|
|
Result.data.y = Unpack.y;
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec2 unpackUnorm2x4(uint8 v)
|
|
{
|
|
float const ScaleFactor(1.f / 15.f);
|
|
detail::u4u4 Unpack;
|
|
Unpack.pack = v;
|
|
return vec2(Unpack.data.x, Unpack.data.y) * ScaleFactor;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint16 packUnorm4x4(vec4 const & v)
|
|
{
|
|
u32vec4 const Unpack(round(clamp(v, 0.0f, 1.0f) * 15.0f));
|
|
detail::u4u4u4u4 Result;
|
|
Result.data.x = Unpack.x;
|
|
Result.data.y = Unpack.y;
|
|
Result.data.z = Unpack.z;
|
|
Result.data.w = Unpack.w;
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec4 unpackUnorm4x4(uint16 v)
|
|
{
|
|
float const ScaleFactor(1.f / 15.f);
|
|
detail::u4u4u4u4 Unpack;
|
|
Unpack.pack = v;
|
|
return vec4(Unpack.data.x, Unpack.data.y, Unpack.data.z, Unpack.data.w) * ScaleFactor;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint16 packUnorm1x5_1x6_1x5(vec3 const & v)
|
|
{
|
|
u32vec3 const Unpack(round(clamp(v, 0.0f, 1.0f) * vec3(31.f, 63.f, 31.f)));
|
|
detail::u5u6u5 Result;
|
|
Result.data.x = Unpack.x;
|
|
Result.data.y = Unpack.y;
|
|
Result.data.z = Unpack.z;
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec3 unpackUnorm1x5_1x6_1x5(uint16 v)
|
|
{
|
|
vec3 const ScaleFactor(1.f / 31.f, 1.f / 63.f, 1.f / 31.f);
|
|
detail::u5u6u5 Unpack;
|
|
Unpack.pack = v;
|
|
return vec3(Unpack.data.x, Unpack.data.y, Unpack.data.z) * ScaleFactor;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint16 packUnorm3x5_1x1(vec4 const & v)
|
|
{
|
|
u32vec4 const Unpack(round(clamp(v, 0.0f, 1.0f) * vec4(31.f, 31.f, 31.f, 1.f)));
|
|
detail::u5u5u5u1 Result;
|
|
Result.data.x = Unpack.x;
|
|
Result.data.y = Unpack.y;
|
|
Result.data.z = Unpack.z;
|
|
Result.data.w = Unpack.w;
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec4 unpackUnorm3x5_1x1(uint16 v)
|
|
{
|
|
vec4 const ScaleFactor(1.f / 31.f, 1.f / 31.f, 1.f / 31.f, 1.f);
|
|
detail::u5u5u5u1 Unpack;
|
|
Unpack.pack = v;
|
|
return vec4(Unpack.data.x, Unpack.data.y, Unpack.data.z, Unpack.data.w) * ScaleFactor;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER uint8 packUnorm2x3_1x2(vec3 const & v)
|
|
{
|
|
u32vec3 const Unpack(round(clamp(v, 0.0f, 1.0f) * vec3(7.f, 7.f, 3.f)));
|
|
detail::u3u3u2 Result;
|
|
Result.data.x = Unpack.x;
|
|
Result.data.y = Unpack.y;
|
|
Result.data.z = Unpack.z;
|
|
return Result.pack;
|
|
}
|
|
|
|
GLM_FUNC_QUALIFIER vec3 unpackUnorm2x3_1x2(uint8 v)
|
|
{
|
|
vec3 const ScaleFactor(1.f / 7.f, 1.f / 7.f, 1.f / 3.f);
|
|
detail::u3u3u2 Unpack;
|
|
Unpack.pack = v;
|
|
return vec3(Unpack.data.x, Unpack.data.y, Unpack.data.z) * ScaleFactor;
|
|
}
|
|
}//namespace glm
|
|
|