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Diffstat (limited to 'external/include/glm/gtc/packing.inl')
| -rw-r--r-- | external/include/glm/gtc/packing.inl | 781 |
1 files changed, 781 insertions, 0 deletions
diff --git a/external/include/glm/gtc/packing.inl b/external/include/glm/gtc/packing.inl new file mode 100644 index 0000000..618fb9e --- /dev/null +++ b/external/include/glm/gtc/packing.inl @@ -0,0 +1,781 @@ +/// @ref gtc_packing +/// @file glm/gtc/packing.inl + +#include "../common.hpp" +#include "../vec2.hpp" +#include "../vec3.hpp" +#include "../vec4.hpp" +#include "../detail/type_half.hpp" +#include <cstring> +#include <limits> + +namespace glm{ +namespace detail +{ + GLM_FUNC_QUALIFIER glm::uint16 float2half(glm::uint32 f) + { + // 10 bits => EE EEEFFFFF + // 11 bits => EEE EEFFFFFF + // Half bits => SEEEEEFF FFFFFFFF + // Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF + + // 0x00007c00 => 00000000 00000000 01111100 00000000 + // 0x000003ff => 00000000 00000000 00000011 11111111 + // 0x38000000 => 00111000 00000000 00000000 00000000 + // 0x7f800000 => 01111111 10000000 00000000 00000000 + // 0x00008000 => 00000000 00000000 10000000 00000000 + return + ((f >> 16) & 0x8000) | // sign + ((((f & 0x7f800000) - 0x38000000) >> 13) & 0x7c00) | // exponential + ((f >> 13) & 0x03ff); // Mantissa + } + + GLM_FUNC_QUALIFIER glm::uint32 float2packed11(glm::uint32 f) + { + // 10 bits => EE EEEFFFFF + // 11 bits => EEE EEFFFFFF + // Half bits => SEEEEEFF FFFFFFFF + // Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF + + // 0x000007c0 => 00000000 00000000 00000111 11000000 + // 0x00007c00 => 00000000 00000000 01111100 00000000 + // 0x000003ff => 00000000 00000000 00000011 11111111 + // 0x38000000 => 00111000 00000000 00000000 00000000 + // 0x7f800000 => 01111111 10000000 00000000 00000000 + // 0x00008000 => 00000000 00000000 10000000 00000000 + return + ((((f & 0x7f800000) - 0x38000000) >> 17) & 0x07c0) | // exponential + ((f >> 17) & 0x003f); // Mantissa + } + + GLM_FUNC_QUALIFIER glm::uint32 packed11ToFloat(glm::uint32 p) + { + // 10 bits => EE EEEFFFFF + // 11 bits => EEE EEFFFFFF + // Half bits => SEEEEEFF FFFFFFFF + // Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF + + // 0x000007c0 => 00000000 00000000 00000111 11000000 + // 0x00007c00 => 00000000 00000000 01111100 00000000 + // 0x000003ff => 00000000 00000000 00000011 11111111 + // 0x38000000 => 00111000 00000000 00000000 00000000 + // 0x7f800000 => 01111111 10000000 00000000 00000000 + // 0x00008000 => 00000000 00000000 10000000 00000000 + return + ((((p & 0x07c0) << 17) + 0x38000000) & 0x7f800000) | // exponential + ((p & 0x003f) << 17); // Mantissa + } + + GLM_FUNC_QUALIFIER glm::uint32 float2packed10(glm::uint32 f) + { + // 10 bits => EE EEEFFFFF + // 11 bits => EEE EEFFFFFF + // Half bits => SEEEEEFF FFFFFFFF + // Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF + + // 0x0000001F => 00000000 00000000 00000000 00011111 + // 0x0000003F => 00000000 00000000 00000000 00111111 + // 0x000003E0 => 00000000 00000000 00000011 11100000 + // 0x000007C0 => 00000000 00000000 00000111 11000000 + // 0x00007C00 => 00000000 00000000 01111100 00000000 + // 0x000003FF => 00000000 00000000 00000011 11111111 + // 0x38000000 => 00111000 00000000 00000000 00000000 + // 0x7f800000 => 01111111 10000000 00000000 00000000 + // 0x00008000 => 00000000 00000000 10000000 00000000 + return + ((((f & 0x7f800000) - 0x38000000) >> 18) & 0x03E0) | // exponential + ((f >> 18) & 0x001f); // Mantissa + } + + GLM_FUNC_QUALIFIER glm::uint32 packed10ToFloat(glm::uint32 p) + { + // 10 bits => EE EEEFFFFF + // 11 bits => EEE EEFFFFFF + // Half bits => SEEEEEFF FFFFFFFF + // Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF + + // 0x0000001F => 00000000 00000000 00000000 00011111 + // 0x0000003F => 00000000 00000000 00000000 00111111 + // 0x000003E0 => 00000000 00000000 00000011 11100000 + // 0x000007C0 => 00000000 00000000 00000111 11000000 + // 0x00007C00 => 00000000 00000000 01111100 00000000 + // 0x000003FF => 00000000 00000000 00000011 11111111 + // 0x38000000 => 00111000 00000000 00000000 00000000 + // 0x7f800000 => 01111111 10000000 00000000 00000000 + // 0x00008000 => 00000000 00000000 10000000 00000000 + return + ((((p & 0x03E0) << 18) + 0x38000000) & 0x7f800000) | // exponential + ((p & 0x001f) << 18); // Mantissa + } + + GLM_FUNC_QUALIFIER glm::uint half2float(glm::uint h) + { + return ((h & 0x8000) << 16) | ((( h & 0x7c00) + 0x1C000) << 13) | ((h & 0x03FF) << 13); + } + + GLM_FUNC_QUALIFIER glm::uint floatTo11bit(float x) + { + if(x == 0.0f) + return 0u; + else if(glm::isnan(x)) + return ~0u; + else if(glm::isinf(x)) + return 0x1Fu << 6u; + + uint Pack = 0u; + memcpy(&Pack, &x, sizeof(Pack)); + return float2packed11(Pack); + } + + GLM_FUNC_QUALIFIER float packed11bitToFloat(glm::uint x) + { + if(x == 0) + return 0.0f; + else if(x == ((1 << 11) - 1)) + return ~0;//NaN + else if(x == (0x1f << 6)) + return ~0;//Inf + + uint Result = packed11ToFloat(x); + + float Temp = 0; + memcpy(&Temp, &Result, sizeof(Temp)); + return Temp; + } + + GLM_FUNC_QUALIFIER glm::uint floatTo10bit(float x) + { + if(x == 0.0f) + return 0u; + else if(glm::isnan(x)) + return ~0u; + else if(glm::isinf(x)) + return 0x1Fu << 5u; + + uint Pack = 0; + memcpy(&Pack, &x, sizeof(Pack)); + return float2packed10(Pack); + } + + GLM_FUNC_QUALIFIER float packed10bitToFloat(glm::uint x) + { + if(x == 0) + return 0.0f; + else if(x == ((1 << 10) - 1)) + return ~0;//NaN + else if(x == (0x1f << 5)) + return ~0;//Inf + + uint Result = packed10ToFloat(x); + + float Temp = 0; + memcpy(&Temp, &Result, sizeof(Temp)); + return Temp; + } + +// GLM_FUNC_QUALIFIER glm::uint f11_f11_f10(float x, float y, float z) +// { +// return ((floatTo11bit(x) & ((1 << 11) - 1)) << 0) | ((floatTo11bit(y) & ((1 << 11) - 1)) << 11) | ((floatTo10bit(z) & ((1 << 10) - 1)) << 22); +// } + + union u3u3u2 + { + struct + { + uint x : 3; + uint y : 3; + uint z : 2; + } data; + uint8 pack; + }; + + union u4u4 + { + struct + { + uint x : 4; + uint y : 4; + } data; + uint8 pack; + }; + + union u4u4u4u4 + { + struct + { + uint x : 4; + uint y : 4; + uint z : 4; + uint w : 4; + } data; + uint16 pack; + }; + + union u5u6u5 + { + struct + { + uint x : 5; + uint y : 6; + uint z : 5; + } data; + uint16 pack; + }; + + union u5u5u5u1 + { + struct + { + uint x : 5; + uint y : 5; + uint z : 5; + uint w : 1; + } data; + uint16 pack; + }; + + union u10u10u10u2 + { + struct + { + uint x : 10; + uint y : 10; + uint z : 10; + uint w : 2; + } data; + uint32 pack; + }; + + union i10i10i10i2 + { + struct + { + int x : 10; + int y : 10; + int z : 10; + int w : 2; + } data; + uint32 pack; + }; + + union u9u9u9e5 + { + struct + { + uint x : 9; + uint y : 9; + uint z : 9; + uint w : 5; + } data; + uint32 pack; + }; + + template <precision P, template <typename, precision> class vecType> + struct compute_half + {}; + + template <precision P> + struct compute_half<P, tvec1> + { + GLM_FUNC_QUALIFIER static tvec1<uint16, P> pack(tvec1<float, P> const & v) + { + int16 const Unpack(detail::toFloat16(v.x)); + u16vec1 Packed(uninitialize); + memcpy(&Packed, &Unpack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER static tvec1<float, P> unpack(tvec1<uint16, P> const & v) + { + i16vec1 Unpack(uninitialize); + memcpy(&Unpack, &v, sizeof(Unpack)); + return tvec1<float, P>(detail::toFloat32(v.x)); + } + }; + + template <precision P> + struct compute_half<P, tvec2> + { + GLM_FUNC_QUALIFIER static tvec2<uint16, P> pack(tvec2<float, P> const & v) + { + tvec2<int16, P> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y)); + u16vec2 Packed(uninitialize); + memcpy(&Packed, &Unpack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER static tvec2<float, P> unpack(tvec2<uint16, P> const & v) + { + i16vec2 Unpack(uninitialize); + memcpy(&Unpack, &v, sizeof(Unpack)); + return tvec2<float, P>(detail::toFloat32(v.x), detail::toFloat32(v.y)); + } + }; + + template <precision P> + struct compute_half<P, tvec3> + { + GLM_FUNC_QUALIFIER static tvec3<uint16, P> pack(tvec3<float, P> const & v) + { + tvec3<int16, P> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y), detail::toFloat16(v.z)); + u16vec3 Packed(uninitialize); + memcpy(&Packed, &Unpack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER static tvec3<float, P> unpack(tvec3<uint16, P> const & v) + { + i16vec3 Unpack(uninitialize); + memcpy(&Unpack, &v, sizeof(Unpack)); + return tvec3<float, P>(detail::toFloat32(v.x), detail::toFloat32(v.y), detail::toFloat32(v.z)); + } + }; + + template <precision P> + struct compute_half<P, tvec4> + { + GLM_FUNC_QUALIFIER static tvec4<uint16, P> pack(tvec4<float, P> const & v) + { + tvec4<int16, P> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y), detail::toFloat16(v.z), detail::toFloat16(v.w)); + u16vec4 Packed(uninitialize); + memcpy(&Packed, &Unpack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER static tvec4<float, P> unpack(tvec4<uint16, P> const & v) + { + i16vec4 Unpack(uninitialize); + memcpy(&Unpack, &v, sizeof(Unpack)); + return tvec4<float, P>(detail::toFloat32(v.x), detail::toFloat32(v.y), detail::toFloat32(v.z), detail::toFloat32(v.w)); + } + }; +}//namespace detail + + GLM_FUNC_QUALIFIER uint8 packUnorm1x8(float v) + { + return static_cast<uint8>(round(clamp(v, 0.0f, 1.0f) * 255.0f)); + } + + GLM_FUNC_QUALIFIER float unpackUnorm1x8(uint8 p) + { + float const Unpack(p); + return Unpack * static_cast<float>(0.0039215686274509803921568627451); // 1 / 255 + } + + GLM_FUNC_QUALIFIER uint16 packUnorm2x8(vec2 const & v) + { + u8vec2 const Topack(round(clamp(v, 0.0f, 1.0f) * 255.0f)); + + uint16 Unpack = 0; + memcpy(&Unpack, &Topack, sizeof(Unpack)); + return Unpack; + } + + GLM_FUNC_QUALIFIER vec2 unpackUnorm2x8(uint16 p) + { + u8vec2 Unpack(uninitialize); + memcpy(&Unpack, &p, sizeof(Unpack)); + return vec2(Unpack) * float(0.0039215686274509803921568627451); // 1 / 255 + } + + GLM_FUNC_QUALIFIER uint8 packSnorm1x8(float v) + { + int8 const Topack(static_cast<int8>(round(clamp(v ,-1.0f, 1.0f) * 127.0f))); + uint8 Packed = 0; + memcpy(&Packed, &Topack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER float unpackSnorm1x8(uint8 p) + { + int8 Unpack = 0; + memcpy(&Unpack, &p, sizeof(Unpack)); + return clamp( + static_cast<float>(Unpack) * 0.00787401574803149606299212598425f, // 1.0f / 127.0f + -1.0f, 1.0f); + } + + GLM_FUNC_QUALIFIER uint16 packSnorm2x8(vec2 const & v) + { + i8vec2 const Topack(round(clamp(v, -1.0f, 1.0f) * 127.0f)); + uint16 Packed = 0; + memcpy(&Packed, &Topack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER vec2 unpackSnorm2x8(uint16 p) + { + i8vec2 Unpack(uninitialize); + memcpy(&Unpack, &p, sizeof(Unpack)); + return clamp( + vec2(Unpack) * 0.00787401574803149606299212598425f, // 1.0f / 127.0f + -1.0f, 1.0f); + } + + GLM_FUNC_QUALIFIER uint16 packUnorm1x16(float s) + { + return static_cast<uint16>(round(clamp(s, 0.0f, 1.0f) * 65535.0f)); + } + + GLM_FUNC_QUALIFIER float unpackUnorm1x16(uint16 p) + { + float const Unpack(p); + return Unpack * 1.5259021896696421759365224689097e-5f; // 1.0 / 65535.0 + } + + GLM_FUNC_QUALIFIER uint64 packUnorm4x16(vec4 const & v) + { + u16vec4 const Topack(round(clamp(v , 0.0f, 1.0f) * 65535.0f)); + uint64 Packed = 0; + memcpy(&Packed, &Topack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER vec4 unpackUnorm4x16(uint64 p) + { + u16vec4 Unpack(uninitialize); + memcpy(&Unpack, &p, sizeof(Unpack)); + return vec4(Unpack) * 1.5259021896696421759365224689097e-5f; // 1.0 / 65535.0 + } + + GLM_FUNC_QUALIFIER uint16 packSnorm1x16(float v) + { + int16 const Topack = static_cast<int16>(round(clamp(v ,-1.0f, 1.0f) * 32767.0f)); + uint16 Packed = 0; + memcpy(&Packed, &Topack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER float unpackSnorm1x16(uint16 p) + { + int16 Unpack = 0; + memcpy(&Unpack, &p, sizeof(Unpack)); + return clamp( + static_cast<float>(Unpack) * 3.0518509475997192297128208258309e-5f, //1.0f / 32767.0f, + -1.0f, 1.0f); + } + + GLM_FUNC_QUALIFIER uint64 packSnorm4x16(vec4 const & v) + { + i16vec4 const Topack(round(clamp(v ,-1.0f, 1.0f) * 32767.0f)); + uint64 Packed = 0; + memcpy(&Packed, &Topack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER vec4 unpackSnorm4x16(uint64 p) + { + i16vec4 Unpack(uninitialize); + memcpy(&Unpack, &p, sizeof(Unpack)); + return clamp( + vec4(Unpack) * 3.0518509475997192297128208258309e-5f, //1.0f / 32767.0f, + -1.0f, 1.0f); + } + + GLM_FUNC_QUALIFIER uint16 packHalf1x16(float v) + { + int16 const Topack(detail::toFloat16(v)); + uint16 Packed = 0; + memcpy(&Packed, &Topack, sizeof(Packed)); + return Packed; + } + + GLM_FUNC_QUALIFIER float unpackHalf1x16(uint16 v) + { + int16 Unpack = 0; + memcpy(&Unpack, &v, sizeof(Unpack)); + return detail::toFloat32(Unpack); + } + + GLM_FUNC_QUALIFIER uint64 packHalf4x16(glm::vec4 const & v) + { + i16vec4 const Unpack( + detail::toFloat16(v.x), + detail::toFloat16(v.y), + detail::toFloat16(v.z), + detail::toFloat16(v.w)); + 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 - 16.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 + |