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43
44 #pragma once
45
46 #ifndef __OPENCV_CUDEV_PTR2D_RESIZE_HPP__
47 #define __OPENCV_CUDEV_PTR2D_RESIZE_HPP__
48
49 #include "opencv2/core/base.hpp"
50 #include "../common.hpp"
51 #include "../grid/copy.hpp"
52 #include "traits.hpp"
53 #include "gpumat.hpp"
54
55 namespace cv { namespace cudev {
56
57 //! @addtogroup cudev
58 //! @{
59
60 template <class SrcPtr> struct ResizePtr
61 {
62 typedef typename PtrTraits<SrcPtr>::value_type value_type;
63 typedef typename PtrTraits<SrcPtr>::index_type index_type;
64
65 SrcPtr src;
66 float fx, fy;
67
operator ()cv::cudev::ResizePtr68 __device__ __forceinline__ typename PtrTraits<SrcPtr>::value_type operator ()(typename PtrTraits<SrcPtr>::index_type y, typename PtrTraits<SrcPtr>::index_type x) const
69 {
70 const float yn = static_cast<float>(y * fy);
71 const float xn = static_cast<float>(x * fx);
72
73 return src(yn, xn);
74 }
75 };
76
77 template <class SrcPtr> struct ResizePtrSz : ResizePtr<SrcPtr>
78 {
79 int rows, cols;
80
81 template <typename T>
assignTocv::cudev::ResizePtrSz82 __host__ void assignTo(GpuMat_<T>& dst, Stream& stream = Stream::Null()) const
83 {
84 gridCopy(*this, dst, stream);
85 }
86 };
87
88 template <class SrcPtr>
resizePtr(const SrcPtr & src,float fx,float fy)89 __host__ ResizePtrSz<typename PtrTraits<SrcPtr>::ptr_type> resizePtr(const SrcPtr& src, float fx, float fy)
90 {
91 ResizePtrSz<typename PtrTraits<SrcPtr>::ptr_type> r;
92 r.src = shrinkPtr(src);
93 r.fx = 1.0f / fx;
94 r.fy = 1.0f / fy;
95 r.rows = cv::saturate_cast<int>(getRows(src) * fy);
96 r.cols = cv::saturate_cast<int>(getCols(src) * fx);
97 return r;
98 }
99
100 template <class SrcPtr> struct PtrTraits< ResizePtrSz<SrcPtr> > : PtrTraitsBase<ResizePtrSz<SrcPtr>, ResizePtr<SrcPtr> >
101 {
102 };
103
104 //! @}
105
106 }}
107
108 #endif
109