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#ifndef __OPENCV_CUDAWARPING_HPP__
#define __OPENCV_CUDAWARPING_HPP__

#ifndef __cplusplus
#  error cudawarping.hpp header must be compiled as C++
#endif

#include "opencv2/core/cuda.hpp"
#include "opencv2/imgproc.hpp"

/**
  @addtogroup cuda
  @{
    @defgroup cudawarping Image Warping
  @}
 */

namespace cv { namespace cuda {

//! @addtogroup cudawarping
//! @{

/** @brief Applies a generic geometrical transformation to an image.

@param src Source image.
@param dst Destination image with the size the same as xmap and the type the same as src .
@param xmap X values. Only CV_32FC1 type is supported.
@param ymap Y values. Only CV_32FC1 type is supported.
@param interpolation Interpolation method (see resize ). INTER_NEAREST , INTER_LINEAR and
INTER_CUBIC are supported for now.
@param borderMode Pixel extrapolation method (see borderInterpolate ). BORDER_REFLECT101 ,
BORDER_REPLICATE , BORDER_CONSTANT , BORDER_REFLECT and BORDER_WRAP are supported for now.
@param borderValue Value used in case of a constant border. By default, it is 0.
@param stream Stream for the asynchronous version.

The function transforms the source image using the specified map:

\f[\texttt{dst} (x,y) =  \texttt{src} (xmap(x,y), ymap(x,y))\f]

Values of pixels with non-integer coordinates are computed using the bilinear interpolation.

@sa remap
 */
CV_EXPORTS void remap(InputArray src, OutputArray dst, InputArray xmap, InputArray ymap,
                      int interpolation, int borderMode = BORDER_CONSTANT, Scalar borderValue = Scalar(),
                      Stream& stream = Stream::Null());

/** @brief Resizes an image.

@param src Source image.
@param dst Destination image with the same type as src . The size is dsize (when it is non-zero)
or the size is computed from src.size() , fx , and fy .
@param dsize Destination image size. If it is zero, it is computed as:
\f[\texttt{dsize = Size(round(fx*src.cols), round(fy*src.rows))}\f]
Either dsize or both fx and fy must be non-zero.
@param fx Scale factor along the horizontal axis. If it is zero, it is computed as:
\f[\texttt{(double)dsize.width/src.cols}\f]
@param fy Scale factor along the vertical axis. If it is zero, it is computed as:
\f[\texttt{(double)dsize.height/src.rows}\f]
@param interpolation Interpolation method. INTER_NEAREST , INTER_LINEAR and INTER_CUBIC are
supported for now.
@param stream Stream for the asynchronous version.

@sa resize
 */
CV_EXPORTS void resize(InputArray src, OutputArray dst, Size dsize, double fx=0, double fy=0, int interpolation = INTER_LINEAR, Stream& stream = Stream::Null());

/** @brief Applies an affine transformation to an image.

@param src Source image. CV_8U , CV_16U , CV_32S , or CV_32F depth and 1, 3, or 4 channels are
supported.
@param dst Destination image with the same type as src . The size is dsize .
@param M *2x3* transformation matrix.
@param dsize Size of the destination image.
@param flags Combination of interpolation methods (see resize) and the optional flag
WARP_INVERSE_MAP specifying that M is an inverse transformation ( dst=\>src ). Only
INTER_NEAREST , INTER_LINEAR , and INTER_CUBIC interpolation methods are supported.
@param borderMode
@param borderValue
@param stream Stream for the asynchronous version.

@sa warpAffine
 */
CV_EXPORTS void warpAffine(InputArray src, OutputArray dst, InputArray M, Size dsize, int flags = INTER_LINEAR,
    int borderMode = BORDER_CONSTANT, Scalar borderValue = Scalar(), Stream& stream = Stream::Null());

/** @brief Builds transformation maps for affine transformation.

@param M *2x3* transformation matrix.
@param inverse Flag specifying that M is an inverse transformation ( dst=\>src ).
@param dsize Size of the destination image.
@param xmap X values with CV_32FC1 type.
@param ymap Y values with CV_32FC1 type.
@param stream Stream for the asynchronous version.

@sa cuda::warpAffine , cuda::remap
 */
CV_EXPORTS void buildWarpAffineMaps(InputArray M, bool inverse, Size dsize, OutputArray xmap, OutputArray ymap, Stream& stream = Stream::Null());

/** @brief Applies a perspective transformation to an image.

@param src Source image. CV_8U , CV_16U , CV_32S , or CV_32F depth and 1, 3, or 4 channels are
supported.
@param dst Destination image with the same type as src . The size is dsize .
@param M *3x3* transformation matrix.
@param dsize Size of the destination image.
@param flags Combination of interpolation methods (see resize ) and the optional flag
WARP_INVERSE_MAP specifying that M is the inverse transformation ( dst =\> src ). Only
INTER_NEAREST , INTER_LINEAR , and INTER_CUBIC interpolation methods are supported.
@param borderMode
@param borderValue
@param stream Stream for the asynchronous version.

@sa warpPerspective
 */
CV_EXPORTS void warpPerspective(InputArray src, OutputArray dst, InputArray M, Size dsize, int flags = INTER_LINEAR,
    int borderMode = BORDER_CONSTANT, Scalar borderValue = Scalar(), Stream& stream = Stream::Null());

/** @brief Builds transformation maps for perspective transformation.

@param M *3x3* transformation matrix.
@param inverse Flag specifying that M is an inverse transformation ( dst=\>src ).
@param dsize Size of the destination image.
@param xmap X values with CV_32FC1 type.
@param ymap Y values with CV_32FC1 type.
@param stream Stream for the asynchronous version.

@sa cuda::warpPerspective , cuda::remap
 */
CV_EXPORTS void buildWarpPerspectiveMaps(InputArray M, bool inverse, Size dsize, OutputArray xmap, OutputArray ymap, Stream& stream = Stream::Null());

/** @brief Builds plane warping maps.
 */
CV_EXPORTS void buildWarpPlaneMaps(Size src_size, Rect dst_roi, InputArray K, InputArray R, InputArray T, float scale,
                                   OutputArray map_x, OutputArray map_y, Stream& stream = Stream::Null());

/** @brief Builds cylindrical warping maps.
 */
CV_EXPORTS void buildWarpCylindricalMaps(Size src_size, Rect dst_roi, InputArray K, InputArray R, float scale,
                                         OutputArray map_x, OutputArray map_y, Stream& stream = Stream::Null());

/** @brief Builds spherical warping maps.
 */
CV_EXPORTS void buildWarpSphericalMaps(Size src_size, Rect dst_roi, InputArray K, InputArray R, float scale,
                                       OutputArray map_x, OutputArray map_y, Stream& stream = Stream::Null());

/** @brief Rotates an image around the origin (0,0) and then shifts it.

@param src Source image. Supports 1, 3 or 4 channels images with CV_8U , CV_16U or CV_32F
depth.
@param dst Destination image with the same type as src . The size is dsize .
@param dsize Size of the destination image.
@param angle Angle of rotation in degrees.
@param xShift Shift along the horizontal axis.
@param yShift Shift along the vertical axis.
@param interpolation Interpolation method. Only INTER_NEAREST , INTER_LINEAR , and INTER_CUBIC
are supported.
@param stream Stream for the asynchronous version.

@sa cuda::warpAffine
 */
CV_EXPORTS void rotate(InputArray src, OutputArray dst, Size dsize, double angle, double xShift = 0, double yShift = 0,
                       int interpolation = INTER_LINEAR, Stream& stream = Stream::Null());

/** @brief Smoothes an image and downsamples it.

@param src Source image.
@param dst Destination image. Will have Size((src.cols+1)/2, (src.rows+1)/2) size and the same
type as src .
@param stream Stream for the asynchronous version.

@sa pyrDown
 */
CV_EXPORTS void pyrDown(InputArray src, OutputArray dst, Stream& stream = Stream::Null());

/** @brief Upsamples an image and then smoothes it.

@param src Source image.
@param dst Destination image. Will have Size(src.cols\*2, src.rows\*2) size and the same type as
src .
@param stream Stream for the asynchronous version.
 */
CV_EXPORTS void pyrUp(InputArray src, OutputArray dst, Stream& stream = Stream::Null());

class CV_EXPORTS ImagePyramid : public Algorithm
{
public:
    virtual void getLayer(OutputArray outImg, Size outRoi, Stream& stream = Stream::Null()) const = 0;
};

CV_EXPORTS Ptr<ImagePyramid> createImagePyramid(InputArray img, int nLayers = -1, Stream& stream = Stream::Null());

//! @}

}} // namespace cv { namespace cuda {

#endif /* __OPENCV_CUDAWARPING_HPP__ */