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half.h
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1 //
2 // Copyright 2016 Pixar
3 //
4 // Licensed under the Apache License, Version 2.0 (the "Apache License")
5 // with the following modification; you may not use this file except in
6 // compliance with the Apache License and the following modification to it:
7 // Section 6. Trademarks. is deleted and replaced with:
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24 #ifndef PXR_BASE_GF_HALF_H
25 #define PXR_BASE_GF_HALF_H
26 
27 /// \file gf/half.h
28 ///
29 /// This header serves to simply bring in the half float datatype and
30 /// provide a hash_value function. For documentation, of the half type,
31 /// please see the half header in ilmbase_half.h.
32 
33 #include "pxr/pxr.h"
36 #include "pxr/base/gf/traits.h"
37 
39 
40 /// A 16-bit floating point data type.
42 
43 namespace pxr_half {
44  /// Overload hash_value for half.
45  inline size_t hash_value(const half h) { return h.bits(); }
46  // Explicitly delete hashing via implicit conversion of half to float
47  size_t hash_value(float) = delete;
48 }
49 
50 template <>
52  public std::integral_constant<bool, true>{};
53 
55 
56 
57 #endif // PXR_BASE_GF_HALF_H
GF_API unsigned short bits() const
Definition: ilmbase_half.h:743
imath_half_bits_t half
if we're in a C-only context, alias the half bits type to half
Definition: half.h:266
GLfloat GLfloat GLfloat GLfloat h
Definition: glcorearb.h:2002
PXR_NAMESPACE_CLOSE_SCOPE PXR_NAMESPACE_OPEN_SCOPE
Definition: path.h:1441
#define PXR_NAMESPACE_CLOSE_SCOPE
Definition: pxr.h:91
size_t hash_value(const half h)
Overload hash_value for half.
Definition: half.h:45