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image: index operator should return references

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this allows the caller to use the return value's address
This commit is contained in:
Danny Robson 2015-09-15 21:08:00 +10:00
parent 040e935b6d
commit b084cb2e4c
2 changed files with 5 additions and 4 deletions
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5
image.cpp
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@ -255,7 +255,7 @@ util::image::buffer<T>::downsample (float factor) const
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
template <typename T> template <typename T>
T const T&
buffer<T>::operator[] (point<2,size_t> p) const buffer<T>::operator[] (point<2,size_t> p) const
{ {
CHECK_LT (p.x, w); CHECK_LT (p.x, w);
@ -279,7 +279,7 @@ buffer<T>::operator[] (point<2,size_t> p)
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
template <typename T> template <typename T>
T const T&
buffer<T>::operator[] (size_t idx) const buffer<T>::operator[] (size_t idx) const
{ {
CHECK_LT (idx, h * s); CHECK_LT (idx, h * s);
@ -354,6 +354,7 @@ buffer<T>::end (void) const
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
template struct util::image::buffer<char>;
template struct util::image::buffer<uint8_t>; template struct util::image::buffer<uint8_t>;
template struct util::image::buffer<uint16_t>; template struct util::image::buffer<uint16_t>;
template struct util::image::buffer<uint32_t>; template struct util::image::buffer<uint32_t>;

4
image.hpp
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@ -63,10 +63,10 @@ namespace util { namespace image {
//--------------------------------------------------------------------- //---------------------------------------------------------------------
constexpr size_t offset (point<2,size_t>) const; constexpr size_t offset (point<2,size_t>) const;
T operator[] (point<2,size_t>) const; const T& operator[] (point<2,size_t>) const;
T& operator[] (point<2,size_t>); T& operator[] (point<2,size_t>);
T operator[] (size_t) const; const T& operator[] (size_t) const;
T& operator[] (size_t); T& operator[] (size_t);
//--------------------------------------------------------------------- //---------------------------------------------------------------------