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Merge pull request #9818 from tz70s:issue#9570

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This commit is contained in:
Alexander Alekhin 2017-10-11 15:19:17 +00:00
commit 024be9b8c9
2 changed files with 48 additions and 0 deletions
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28
modules/core/include/opencv2/core/mat.inl.hpp
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@ -1058,6 +1058,34 @@ const uchar* Mat::ptr(const int* idx) const
return p; return p;
} }
template<typename _Tp> inline
_Tp* Mat::ptr(const int* idx)
{
int i, d = dims;
uchar* p = data;
CV_DbgAssert( d >= 1 && p );
for( i = 0; i < d; i++ )
{
CV_DbgAssert( (unsigned)idx[i] < (unsigned)size.p[i] );
p += idx[i] * step.p[i];
}
return (_Tp*)p;
}
template<typename _Tp> inline
const _Tp* Mat::ptr(const int* idx) const
{
int i, d = dims;
uchar* p = data;
CV_DbgAssert( d >= 1 && p );
for( i = 0; i < d; i++ )
{
CV_DbgAssert( (unsigned)idx[i] < (unsigned)size.p[i] );
p += idx[i] * step.p[i];
}
return (const _Tp*)p;
}
template<typename _Tp> inline template<typename _Tp> inline
_Tp& Mat::at(int i0, int i1) _Tp& Mat::at(int i0, int i1)
{ {

20
modules/core/test/test_mat.cpp
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@ -1804,4 +1804,24 @@ TEST(Mat_, from_initializer_list)
ASSERT_DOUBLE_EQ(norm(A, B, NORM_INF), 0.); ASSERT_DOUBLE_EQ(norm(A, B, NORM_INF), 0.);
} }
TEST(Mat, template_based_ptr)
{
Mat mat = (Mat_<float>(2, 2) << 11.0f, 22.0f, 33.0f, 44.0f);
int idx[2] = {1, 0};
ASSERT_FLOAT_EQ(33.0f, *(mat.ptr<float>(idx)));
idx[0] = 1;
idx[1] = 1;
ASSERT_FLOAT_EQ(44.0f, *(mat.ptr<float>(idx)));
}
TEST(Mat_, template_based_ptr)
{
int dim[4] = {2, 2, 1, 2};
Mat_<float> mat = (Mat_<float>(4, dim) << 11.0f, 22.0f, 33.0f, 44.0f,
55.0f, 66.0f, 77.0f, 88.0f);
int idx[4] = {1, 0, 0, 1};
ASSERT_FLOAT_EQ(66.0f, *(mat.ptr<float>(idx)));
}
#endif #endif