diff options
Diffstat (limited to 'src/include/glm/gtc/packing.inl')
| -rw-r--r-- | src/include/glm/gtc/packing.inl | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/src/include/glm/gtc/packing.inl b/src/include/glm/gtc/packing.inl new file mode 100644 index 0000000..03b2750 --- /dev/null +++ b/src/include/glm/gtc/packing.inl @@ -0,0 +1,938 @@ +/// @ref gtc_packing
+
+#include "../ext/scalar_relational.hpp"
+#include "../ext/vector_relational.hpp"
+#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<length_t L, qualifier Q>
+ struct compute_half
+ {};
+
+ template<qualifier Q>
+ struct compute_half<1, Q>
+ {
+ GLM_FUNC_QUALIFIER static vec<1, uint16, Q> pack(vec<1, float, Q> const& v)
+ {
+ int16 const Unpack(detail::toFloat16(v.x));
+ u16vec1 Packed;
+ memcpy(&Packed, &Unpack, sizeof(Packed));
+ return Packed;
+ }
+
+ GLM_FUNC_QUALIFIER static vec<1, float, Q> unpack(vec<1, uint16, Q> const& v)
+ {
+ i16vec1 Unpack;
+ memcpy(&Unpack, &v, sizeof(Unpack));
+ return vec<1, float, Q>(detail::toFloat32(v.x));
+ }
+ };
+
+ template<qualifier Q>
+ struct compute_half<2, Q>
+ {
+ GLM_FUNC_QUALIFIER static vec<2, uint16, Q> pack(vec<2, float, Q> const& v)
+ {
+ vec<2, int16, Q> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y));
+ u16vec2 Packed;
+ memcpy(&Packed, &Unpack, sizeof(Packed));
+ return Packed;
+ }
+
+ GLM_FUNC_QUALIFIER static vec<2, float, Q> unpack(vec<2, uint16, Q> const& v)
+ {
+ i16vec2 Unpack;
+ memcpy(&Unpack, &v, sizeof(Unpack));
+ return vec<2, float, Q>(detail::toFloat32(v.x), detail::toFloat32(v.y));
+ }
+ };
+
+ template<qualifier Q>
+ struct compute_half<3, Q>
+ {
+ GLM_FUNC_QUALIFIER static vec<3, uint16, Q> pack(vec<3, float, Q> const& v)
+ {
+ vec<3, int16, Q> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y), detail::toFloat16(v.z));
+ u16vec3 Packed;
+ memcpy(&Packed, &Unpack, sizeof(Packed));
+ return Packed;
+ }
+
+ GLM_FUNC_QUALIFIER static vec<3, float, Q> unpack(vec<3, uint16, Q> const& v)
+ {
+ i16vec3 Unpack;
+ memcpy(&Unpack, &v, sizeof(Unpack));
+ return vec<3, float, Q>(detail::toFloat32(v.x), detail::toFloat32(v.y), detail::toFloat32(v.z));
+ }
+ };
+
+ template<qualifier Q>
+ struct compute_half<4, Q>
+ {
+ GLM_FUNC_QUALIFIER static vec<4, uint16, Q> pack(vec<4, float, Q> const& v)
+ {
+ vec<4, int16, Q> const Unpack(detail::toFloat16(v.x), detail::toFloat16(v.y), detail::toFloat16(v.z), detail::toFloat16(v.w));
+ u16vec4 Packed;
+ memcpy(&Packed, &Unpack, sizeof(Packed));
+ return Packed;
+ }
+
+ GLM_FUNC_QUALIFIER static vec<4, float, Q> unpack(vec<4, uint16, Q> const& v)
+ {
+ i16vec4 Unpack;
+ memcpy(&Unpack, &v, sizeof(Unpack));
+ return vec<4, float, Q>(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;
+ 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;
+ 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;
+ 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;
+ 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;
+ 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)
+ {
+ ivec4 const Pack(round(clamp(v,-1.0f, 1.0f) * vec4(511.f, 511.f, 511.f, 1.f)));
+
+ detail::i10i10i10i2 Result;
+ Result.data.x = Pack.x;
+ Result.data.y = Pack.y;
+ Result.data.z = Pack.z;
+ Result.data.w = Pack.w;
+ return Result.pack;
+ }
+
+ GLM_FUNC_QUALIFIER vec4 unpackSnorm3x10_1x2(uint32 v)
+ {
+ detail::i10i10i10i2 Unpack;
+ Unpack.pack = v;
+
+ vec4 const Result(Unpack.data.x, Unpack.data.y, Unpack.data.z, Unpack.data.w);
+
+ return clamp(Result * vec4(1.f / 511.f, 1.f / 511.f, 1.f / 511.f, 1.f), -1.0f, 1.0f);
+ }
+
+ 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 = equal(MaxShared, pow(2.0f, 9.0f), epsilon<float>()) ? 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);
+ }
+
+ // Based on Brian Karis http://graphicrants.blogspot.fr/2009/04/rgbm-color-encoding.html
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<4, T, Q> packRGBM(vec<3, T, Q> const& rgb)
+ {
+ vec<3, T, Q> const Color(rgb * static_cast<T>(1.0 / 6.0));
+ T Alpha = clamp(max(max(Color.x, Color.y), max(Color.z, static_cast<T>(1e-6))), static_cast<T>(0), static_cast<T>(1));
+ Alpha = ceil(Alpha * static_cast<T>(255.0)) / static_cast<T>(255.0);
+ return vec<4, T, Q>(Color / Alpha, Alpha);
+ }
+
+ template<typename T, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<3, T, Q> unpackRGBM(vec<4, T, Q> const& rgbm)
+ {
+ return vec<3, T, Q>(rgbm.x, rgbm.y, rgbm.z) * rgbm.w * static_cast<T>(6);
+ }
+
+ template<length_t L, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, uint16, Q> packHalf(vec<L, float, Q> const& v)
+ {
+ return detail::compute_half<L, Q>::pack(v);
+ }
+
+ template<length_t L, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, float, Q> unpackHalf(vec<L, uint16, Q> const& v)
+ {
+ return detail::compute_half<L, Q>::unpack(v);
+ }
+
+ template<typename uintType, length_t L, typename floatType, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, uintType, Q> packUnorm(vec<L, floatType, Q> 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 vec<L, uintType, Q>(round(clamp(v, static_cast<floatType>(0), static_cast<floatType>(1)) * static_cast<floatType>(std::numeric_limits<uintType>::max())));
+ }
+
+ template<typename floatType, length_t L, typename uintType, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, floatType, Q> unpackUnorm(vec<L, uintType, Q> 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 vec<L, float, Q>(v) * (static_cast<floatType>(1) / static_cast<floatType>(std::numeric_limits<uintType>::max()));
+ }
+
+ template<typename intType, length_t L, typename floatType, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, intType, Q> packSnorm(vec<L, floatType, Q> 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 vec<L, intType, Q>(round(clamp(v , static_cast<floatType>(-1), static_cast<floatType>(1)) * static_cast<floatType>(std::numeric_limits<intType>::max())));
+ }
+
+ template<typename floatType, length_t L, typename intType, qualifier Q>
+ GLM_FUNC_QUALIFIER vec<L, floatType, Q> unpackSnorm(vec<L, intType, Q> 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(vec<L, floatType, Q>(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;
+ }
+
+ GLM_FUNC_QUALIFIER int16 packInt2x8(i8vec2 const& v)
+ {
+ int16 Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER i8vec2 unpackInt2x8(int16 p)
+ {
+ i8vec2 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER uint16 packUint2x8(u8vec2 const& v)
+ {
+ uint16 Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER u8vec2 unpackUint2x8(uint16 p)
+ {
+ u8vec2 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER int32 packInt4x8(i8vec4 const& v)
+ {
+ int32 Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER i8vec4 unpackInt4x8(int32 p)
+ {
+ i8vec4 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER uint32 packUint4x8(u8vec4 const& v)
+ {
+ uint32 Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER u8vec4 unpackUint4x8(uint32 p)
+ {
+ u8vec4 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER int packInt2x16(i16vec2 const& v)
+ {
+ int Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER i16vec2 unpackInt2x16(int p)
+ {
+ i16vec2 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER int64 packInt4x16(i16vec4 const& v)
+ {
+ int64 Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER i16vec4 unpackInt4x16(int64 p)
+ {
+ i16vec4 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER uint packUint2x16(u16vec2 const& v)
+ {
+ uint Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER u16vec2 unpackUint2x16(uint p)
+ {
+ u16vec2 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER uint64 packUint4x16(u16vec4 const& v)
+ {
+ uint64 Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER u16vec4 unpackUint4x16(uint64 p)
+ {
+ u16vec4 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER int64 packInt2x32(i32vec2 const& v)
+ {
+ int64 Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER i32vec2 unpackInt2x32(int64 p)
+ {
+ i32vec2 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+
+ GLM_FUNC_QUALIFIER uint64 packUint2x32(u32vec2 const& v)
+ {
+ uint64 Pack = 0;
+ memcpy(&Pack, &v, sizeof(Pack));
+ return Pack;
+ }
+
+ GLM_FUNC_QUALIFIER u32vec2 unpackUint2x32(uint64 p)
+ {
+ u32vec2 Unpack;
+ memcpy(&Unpack, &p, sizeof(Unpack));
+ return Unpack;
+ }
+}//namespace glm
+
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