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Merge pull request #7539 from Tetragramm:90DegreeRotations

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This commit is contained in:
Vadim Pisarevsky 2016-11-11 20:30:24 +00:00
commit 6b7d570c34
2 changed files with 66 additions and 0 deletions
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18
modules/core/include/opencv2/core.hpp
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@ -1022,6 +1022,24 @@ around both axes.
*/
CV_EXPORTS_W void flip(InputArray src, OutputArray dst, int flipCode);
enum RotateFlags {
ROTATE_90_CLOCKWISE = 0, //Rotate 90 degrees clockwise
ROTATE_180 = 1, //Rotate 180 degrees clockwise
ROTATE_90_COUNTERCLOCKWISE = 2, //Rotate 270 degrees clockwise
};
/** @brief Rotates a 2D array in multiples of 90 degrees.
The function rotate rotates the array in one of three different ways:
* Rotate by 90 degrees clockwise (rotateCode = ROTATE_90).
* Rotate by 180 degrees clockwise (rotateCode = ROTATE_180).
* Rotate by 270 degrees clockwise (rotateCode = ROTATE_270).
@param src input array.
@param dst output array of the same type as src. The size is the same with ROTATE_180,
and the rows and cols are switched for ROTATE_90 and ROTATE_270.
@param rotateCode an enum to specify how to rotate the array; see the enum RotateFlags
@sa transpose , repeat , completeSymm, flip, RotateFlags
*/
CV_EXPORTS_W void rotate(InputArray src, OutputArray dst, int rotateCode);
/** @brief Fills the output array with repeated copies of the input array.
The function cv::repeat duplicates the input array one or more times along each of the two axes:

48
modules/core/src/copy.cpp
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@ -826,6 +826,54 @@ void flip( InputArray _src, OutputArray _dst, int flip_mode )
flipHoriz( dst.ptr(), dst.step, dst.ptr(), dst.step, dst.size(), esz );
}
#ifdef HAVE_OPENCL
static bool ocl_rotate(InputArray _src, OutputArray _dst, int rotateMode)
{
switch (rotateMode)
{
case ROTATE_90_CLOCKWISE:
transpose(_src, _dst);
flip(_dst, _dst, 1);
break;
case ROTATE_180:
flip(_src, _dst, -1);
break;
case ROTATE_90_COUNTERCLOCKWISE:
transpose(_src, _dst);
flip(_dst, _dst, 0);
break;
default:
break;
}
return true;
}
#endif
void rotate(InputArray _src, OutputArray _dst, int rotateMode)
{
CV_Assert(_src.dims() <= 2);
CV_OCL_RUN(_dst.isUMat(), ocl_rotate(_src, _dst, rotateMode))
switch (rotateMode)
{
case ROTATE_90_CLOCKWISE:
transpose(_src, _dst);
flip(_dst, _dst, 1);
break;
case ROTATE_180:
flip(_src, _dst, -1);
break;
case ROTATE_90_COUNTERCLOCKWISE:
transpose(_src, _dst);
flip(_dst, _dst, 0);
break;
default:
break;
}
}
#if defined HAVE_OPENCL && !defined __APPLE__
static bool ocl_repeat(InputArray _src, int ny, int nx, OutputArray _dst)