    // Copyright (C) 2006  Davis E. King (davis@dlib.net)
    // License: Boost Software License   See LICENSE.txt for the full license.
    #undef DLIB_IMAGE_SAVEr_ABSTRACT_
    #ifdef DLIB_IMAGE_SAVEr_ABSTRACT_

    #include <iosfwd>
    #include "../algs.h"
    #include "../pixel.h"
    #include "../image_processing/generic_image.h"

    namespace dlib
    {
        class image_save_error : public dlib::error
        {
            /*!
                WHAT THIS OBJECT REPRESENTS
                    This is an exception used to indicate a failure to save an image.
                    Its type member variable will be set to EIMAGE_SAVE.
            !*/
        };

    // ----------------------------------------------------------------------------------------

        template <
            typename image_type
            >
        void save_bmp (
            const image_type& image,
            std::ostream& out
        );
        /*!
            requires
                - image_type == an image object that implements the interface defined in
                  dlib/image_processing/generic_image.h or any kind of matrix expression.
            ensures
                - writes the image to the out stream in the Microsoft Windows BMP format.
                - image[0][0] will be in the upper left corner of the image.
                - image[image.nr()-1][image.nc()-1] will be in the lower right
                  corner of the image.
                - This routine can save images containing any type of pixel. However, it
                  will convert all color pixels into rgb_pixel and grayscale pixels into
                  uint8 type before saving to disk.
            throws
                - image_save_error
                    This exception is thrown if there is an error that prevents us
                    from saving the image.
                - std::bad_alloc
        !*/

    // ----------------------------------------------------------------------------------------

        template <
            typename image_type
            >
        void save_bmp (
            const image_type& image,
            const std::string& file_name
        );
        /*!
            requires
                - image_type == an image object that implements the interface defined in
                  dlib/image_processing/generic_image.h or any kind of matrix expression.
            ensures
                - opens the file indicated by file_name with an output file stream named fout
                  and performs:
                  save_bmp(image,fout);
        !*/

    // ----------------------------------------------------------------------------------------

        /*!
            dlib dng file format:
                This is a file format I created for this library.  It is a lossless
                compressed image format that is similar to the PNG format but uses
                the dlib PPM compression algorithms instead of the DEFLATE algorithm.
        !*/

        template <
            typename image_type
            >
        void save_dng (
            const image_type& image,
            std::ostream& out
        );
        /*!
            requires
                - image_type == an image object that implements the interface defined in
                  dlib/image_processing/generic_image.h or any kind of matrix expression.
            ensures
                - writes the image to the out stream in the dlib dng format.
                - image[0][0] will be in the upper left corner of the image.
                - image[image.nr()-1][image.nc()-1] will be in the lower right
                  corner of the image.
                - This routine can save images containing any type of pixel.  However, the DNG
                  format can natively store only the following pixel types: rgb_pixel,
                  hsi_pixel, rgb_alpha_pixel, uint8, uint16, float, and double.
                  All other pixel types will be converted into one of these types as
                  appropriate before being saved to disk.
            throws
                - image_save_error
                    This exception is thrown if there is an error that prevents us
                    from saving the image.
                - std::bad_alloc
        !*/

    // ----------------------------------------------------------------------------------------

        template <typename image_type>
        void save_dng (
            const image_type& image,
            const std::string& file_name
        );
        /*!
            requires
                - image_type == an image object that implements the interface defined in
                  dlib/image_processing/generic_image.h or any kind of matrix expression.
            ensures
                - opens the file indicated by file_name with an output file stream named fout
                  and performs:
                  save_dng(image,fout);
        !*/

    // ----------------------------------------------------------------------------------------

    }

    #endif // DLIB_IMAGE_SAVEr_ABSTRACT_