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Added 16bit pack and unpack to GTC_packing

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This commit is contained in:
Christophe Riccio
2015-10-11 23:02:42 +02:00
parent 92a6c207bc
commit bb9ce516b0
4 changed files with 254 additions and 1 deletions
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48
glm/gtc/packing.hpp
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@@ -543,6 +543,54 @@ namespace glm
template <typename intType, typename floatType, precision P, template <typename, precision> class vecType>
GLM_FUNC_DECL vecType<floatType, P> unpackSnorm(vecType<intType, P> const & v);
/// Convert each component of the normalized floating-point vector into unsigned integer values.
///
/// @see gtc_packing
/// @see vec2 unpackUnorm2x4(uint8 p)
GLM_FUNC_DECL uint8 packUnorm2x4(vec2 const & v);
/// Convert each unsigned integer components of a vector to normalized floating-point values.
///
/// @see gtc_packing
/// @see uint8 packUnorm2x4(vec2 const & v)
GLM_FUNC_DECL vec2 unpackUnorm2x4(uint8 p);
/// Convert each component of the normalized floating-point vector into unsigned integer values.
///
/// @see gtc_packing
/// @see vec4 unpackUnorm4x4(uint16 p)
GLM_FUNC_DECL uint16 packUnorm4x4(vec4 const & v);
/// Convert each unsigned integer components of a vector to normalized floating-point values.
///
/// @see gtc_packing
/// @see uint16 packUnorm4x4(vec4 const & v)
GLM_FUNC_DECL vec4 unpackUnorm4x4(uint16 p);
/// Convert each component of the normalized floating-point vector into unsigned integer values.
///
/// @see gtc_packing
/// @see vec3 unpackUnorm1x5_1x6_1x5(uint16 p)
GLM_FUNC_DECL uint16 packUnorm1x5_1x6_1x5(vec3 const & v);
/// Convert each unsigned integer components of a vector to normalized floating-point values.
///
/// @see gtc_packing
/// @see uint16 packUnorm1x5_1x6_1x5(vec3 const & v)
GLM_FUNC_DECL vec3 unpackUnorm1x5_1x6_1x5(uint16 p);
/// Convert each component of the normalized floating-point vector into unsigned integer values.
///
/// @see gtc_packing
/// @see vec4 unpackUnorm3x5_1x1(uint16 p)
GLM_FUNC_DECL uint16 packUnorm3x5_1x1(vec4 const & v);
/// Convert each unsigned integer components of a vector to normalized floating-point values.
///
/// @see gtc_packing
/// @see uint16 packUnorm3x5_1x1(vec4 const & v)
GLM_FUNC_DECL vec4 unpackUnorm3x5_1x1(uint16 p);
/// @}
}// namespace glm

119
glm/gtc/packing.inl
View File

@@ -225,6 +225,51 @@ namespace detail
// return ((floatTo11bit(x) & ((1 << 11) - 1)) << 0) | ((floatTo11bit(y) & ((1 << 11) - 1)) << 11) | ((floatTo10bit(z) & ((1 << 10) - 1)) << 22);
// }
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
@@ -655,4 +700,78 @@ namespace detail
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(15.f, 31.f, 15.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 / 15.f, 1.f / 31.f, 1.f / 15.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(15.f, 15.f, 15.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 / 15.f, 1.f / 15.f, 1.f / 15.f, 1.f);
detail::u5u5u5u1 Unpack;
Unpack.pack = v;
return vec4(Unpack.data.x, Unpack.data.y, Unpack.data.z, Unpack.data.w) * ScaleFactor;
}
}//namespace glm