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Added packing function implementations

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This commit is contained in:
Christophe Riccio 2011-01-20 13:50:03 +00:00
parent 17234f68e0
commit 53b7a7c64b
2 changed files with 78 additions and 9 deletions
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16
glm/core/func_packing.hpp
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@ -21,16 +21,16 @@ namespace glm
//! Define packing functions from section 8.4 floating-point pack and unpack functions of GLSL 4.00.8 specification //! Define packing functions from section 8.4 floating-point pack and unpack functions of GLSL 4.00.8 specification
namespace packing namespace packing
{ {
uint packUnorm2x16(vec2 const & v); detail::uint32 packUnorm2x16(detail::tvec2<detail::float32> const & v);
uint packUnorm4x8(vec4 const & v); detail::uint32 packUnorm4x8(detail::tvec4<detail::float32> const & v);
uint packSnorm4x8(vec4 const & v); detail::uint32 packSnorm4x8(detail::tvec4<detail::float32> const & v);
vec2 unpackUnorm2x16(uint const & p); detail::tvec2<detail::float32> unpackUnorm2x16(detail::uint32 const & p);
vec4 unpackUnorm4x8(uint const & p); detail::tvec4<detail::float32> unpackUnorm4x8(detail::uint32 const & p);
vec4 unpackSnorm4x8(uint const & p); detail::tvec4<detail::float32> unpackSnorm4x8(detail::uint32 const & p);
double packDouble2x32(uvec2 const & v); double packDouble2x32(detail::tvec2<detail::uint32> const & v);
uvec2 unpackDouble2x32(double const & v); detail::tvec2<detail::uint32> unpackDouble2x32(double const & v);
}//namespace packing }//namespace packing
}//namespace function }//namespace function

71
glm/core/func_packing.inl
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@ -16,8 +16,77 @@ namespace glm
namespace core{ namespace core{
namespace function{ namespace function{
namespace packing{ namespace packing
{
inline detail::uint32 packUnorm2x16(detail::tvec2<detail::float32> const & v)
{
detail::uint16 A((detail::uint16)round(clamp(v.x, 0.0f, 1.0f) * 65535.0f));
detail::uint16 B((detail::uint16)round(clamp(v.y, 0.0f, 1.0f) * 65535.0f));
return detail::uint32((B << 16) | A);
}
inline detail::uint32 packUnorm4x8(detail::tvec4<detail::float32> const & v)
{
detail::uint8 A((detail::uint8)round(clamp(v.x, 0.0f, 1.0f) * 255.0f));
detail::uint8 B((detail::uint8)round(clamp(v.y, 0.0f, 1.0f) * 255.0f));
detail::uint8 C((detail::uint8)round(clamp(v.z, 0.0f, 1.0f) * 255.0f));
detail::uint8 D((detail::uint8)round(clamp(v.w, 0.0f, 1.0f) * 255.0f));
return detail::uint32((D << 24) | (C << 16) | (B << 8) | A);
}
inline detail::uint32 packSnorm4x8(detail::tvec4<detail::float32> const & v)
{
detail::uint8 A((detail::uint8)round(clamp(v.x,-1.0f, 1.0f) * 255.0f));
detail::uint8 B((detail::uint8)round(clamp(v.y,-1.0f, 1.0f) * 255.0f));
detail::uint8 C((detail::uint8)round(clamp(v.z,-1.0f, 1.0f) * 255.0f));
detail::uint8 D((detail::uint8)round(clamp(v.w,-1.0f, 1.0f) * 255.0f));
return detail::uint32((D << 24) | (C << 16) | (B << 8) | A);
}
inline detail::tvec2<detail::float32> unpackUnorm2x16(detail::uint32 const & p)
{
detail::uint16 A(detail::uint16(p >> 0));
detail::uint16 B(detail::uint16(p >> 16));
return detail::tvec2<detail::float32>(
A * 1.0f / 65535.0f,
B * 1.0f / 65535.0f);
}
inline detail::tvec4<detail::float32> unpackUnorm4x8(detail::uint32 const & p)
{
detail::uint8 A(detail::uint8(p >> 0));
detail::uint8 B(detail::uint8(p >> 8));
detail::uint8 C(detail::uint8(p >> 16));
detail::uint8 D(detail::uint8(p >> 24));
return detail::tvec4<detail::float32>(
A * 1.0f / 255.0f,
B * 1.0f / 255.0f,
C * 1.0f / 255.0f,
D * 1.0f / 255.0f);
}
inline detail::tvec4<detail::float32> unpackSnorm4x8(detail::uint32 const & p)
{
detail::uint8 A(detail::uint8(p >> 0));
detail::uint8 B(detail::uint8(p >> 8));
detail::uint8 C(detail::uint8(p >> 16));
detail::uint8 D(detail::uint8(p >> 24));
return clamp(detail::tvec4<detail::float32>(
A * 1.0f / 127.0f,
B * 1.0f / 127.0f,
C * 1.0f / 127.0f,
D * 1.0f / 127.0f), -1.0f, 1.0f);
}
inline double packDouble2x32(detail::tvec2<detail::uint32> const & v)
{
return *(double*)&v;
}
inline detail::tvec2<detail::uint32> unpackDouble2x32(double const & v)
{
return *(detail::tvec2<detail::uint32>*)&v;
}
}//namespace packing }//namespace packing
}//namespace function }//namespace function