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Optimized GTC_packing implementation

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This commit is contained in:
Christophe Riccio
2016-11-20 19:54:03 +01:00
parent 3cc726c7a4
commit 32cfecba97
3 changed files with 13 additions and 12 deletions
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20
glm/gtc/packing.inl
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@@ -554,11 +554,13 @@ namespace detail
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 = 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));
Result.data.x = Pack.x;
Result.data.y = Pack.y;
Result.data.z = Pack.z;
Result.data.w = Pack.w;
return Result.pack;
}
@@ -566,12 +568,10 @@ namespace detail
{
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;
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)