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#ifndef BOX_FILTER_GL_SEPARABLE_H_
#define BOX_FILTER_GL_SEPARABLE_H_
#include "CommonDeclare.hpp"
#ifndef INPUT_IMAGE
#define INPUT_IMAGE "BoxFilterGL_Input.bmp"
#endif
#define OUTPUT_SEPARABLE_IMAGE "BoxFilterGLSeparable_Output.bmp"

#define GROUP_SIZE 256
#define FILTER_WIDTH 9

/**
* BoxFilterGLSeparable 
* Class implements OpenCL Box Filter GL interoperability sample (Separable version)
* Derived from SDKSample base class
*/

class BoxFilterGLSeparable : public SDKSample
{
public:
    static BoxFilterGLSeparable *boxFilterGLSeparable;
    cl_double setupTime;                /**< time taken to setup OpenCL resources and building kernel */
    cl_double kernelTime;               /**< time taken to run kernel and read result back */
    cl_uchar4* inputImageData;          /**< Input bitmap data to device */
    cl_uchar4* outputImageData;         /**< Output from device */
    cl_context context;                 /**< CL context */
    cl_device_id *devices;              /**< CL device list */
    cl_mem inputImageBuffer;            /**< CL memory buffer for input Image*/
    cl_mem tempImageBuffer;             
    cl_mem outputImageBuffer;           /**< CL memory buffer for Output Image*/
    cl_uchar4* verificationOutput;       /**< Output array for reference implementation */
    cl_command_queue commandQueue;      /**< CL command queue */
    cl_program program;                 /**< CL program  */
    cl_kernel horizontalKernel;         /**< CL kernel */
    cl_kernel verticalKernel;           /**< CL kernel */
    streamsdk::SDKBitMap inputBitmap;   /**< Bitmap class object */
    streamsdk::uchar4* pixelData;       /**< Pointer to image data */
    cl_uint pixelSize;                  /**< Size of a pixel in BMP format> */
    cl_uint width;                      /**< Width of image */
    cl_uint height;                     /**< Height of image */
    cl_bool byteRWSupport;
    size_t blockSizeX;                  /**< Work-group size in x-direction */
    size_t blockSizeY;                  /**< Work-group size in y-direction */
    int iterations;                     /**< Number of iterations for kernel execution */
    int filterWidth;                    /**< Width of filter */
    clock_t t1, t2;
    int frameCount;
    int frameRefCount;
    double totalElapsedTime;
    GLuint pbo;                         //pixel-buffer object to hold-image data
    GLuint tex;                         //Texture to display
    cl_device_id interopDeviceId;
    streamsdk::SDKDeviceInfo deviceInfo;                /**< Structure to store device information*/
    streamsdk::KernelWorkGroupInfo kernelInfoH,kernelInfoV;     /**< Structure to store kernel related info */

public:

    /**
    * Read bitmap image and allocate host memory
    * @param inputImageName name of the input file
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int readInputImage(std::string inputImageName);

    /**
    * Write to an image file
    * @param outputImageName name of the output file
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int writeOutputImage(std::string outputImageName);

    /** 
    * Constructor 
    * Initialize member variables
    * @param name name of sample (string)
    */
    BoxFilterGLSeparable(std::string name)
        : SDKSample(name),
        inputImageData(NULL),
        outputImageData(NULL),
        verificationOutput(NULL),
        byteRWSupport(true)
    {
        pixelSize = sizeof(streamsdk::uchar4);
        pixelData = NULL;
        blockSizeX = GROUP_SIZE;
        blockSizeY = 1;
        iterations = 1;
        filterWidth = FILTER_WIDTH;
        frameCount = 0;
        frameRefCount = 90;
        totalElapsedTime = 0.0;
    }

    /** 
    * Constructor 
    * Initialize member variables
    * @param name name of sample (const char*)
    */
    BoxFilterGLSeparable(const char* name)
        : SDKSample(name),
        inputImageData(NULL),
        outputImageData(NULL),
        verificationOutput(NULL),
        byteRWSupport(true)
    {
        pixelSize = sizeof(streamsdk::uchar4);
        pixelData = NULL;
        blockSizeX = GROUP_SIZE;
        blockSizeY = 1;
        iterations = 1;
        filterWidth = FILTER_WIDTH;
        frameCount = 0;
        frameRefCount = 90;
        totalElapsedTime = 0.0;
    }

    ~BoxFilterGLSeparable()
    {
    }

    /**
    * Allocate image memory and Load bitmap file
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int setupBoxFilter();

    /**
     * Override from SDKSample, Generate binary image of given kernel 
     * and exit application
     * @return SDK_SUCCESS on success and SDK_FAILURE on failure
     */
    int genBinaryImage();

    /**
    * OpenCL related initialisations. 
    * Set up Context, Device list, Command Queue, Memory buffers
    * Build CL kernel program executable
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int setupCL();

    /**
    * Initializing GL and get interoperable CL context
    * @param argc number of arguments
    * @param argv command line arguments
    * @
    * @return SDK_SUCCESS on success and SDK_FALIURE on failure.
    */
    int initializeGLAndGetCLContext(cl_platform_id platform,
            cl_context &context,
            cl_device_id &interopDevice);

#ifdef _WIN32
/**
 * enableGLAndGLContext
 * creates a GL Context on a specified device and get its deviceId
 * @param hWnd Window Handle
 * @param hRC context of window
 * @param platform cl_platform_id selected
 * @param context associated cl_context
 * @param interopDevice cl_device_id of selected device
 * @return SDK_SUCCESS on success and SDK_FAILURE on failure
 */
    int enableGLAndGetGLContext(HWND hWnd, 
            HDC &hDC, 
            HGLRC &hRC, 
            cl_platform_id platform, 
            cl_context &context, 
            cl_device_id &interopDevice);

    void disableGL(HWND hWnd, HDC hDC, HGLRC hRC);
#else 
        
#endif
    /**
    * Set values for kernels' arguments, enqueue calls to the kernels
    * on to the command queue, wait till end of kernel execution.
    * Get kernel start and end time if timing is enabled
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int runCLKernels();

    /**
    * Reference CPU implementation of Binomial Option
    * for performance comparison
    */
    void boxFilterCPUReference();

    /**
    * Override from SDKSample. Print sample stats.
    */
    void printStats();

    /**
    * Override from SDKSample. Initialize 
    * command line parser, add custom options
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int initialize();

    /**
    * Override from SDKSample, adjust width and height 
    * of execution domain, perform all sample setup
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int setup();

    /**
    * Override from SDKSample
    * Run OpenCL Sobel Filter
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int run();

    /**
    * Override from SDKSample
    * Cleanup memory allocations
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int cleanup();

    /**
    * Override from SDKSample
    * Verify against reference implementation
    * @return SDK_SUCCESS on success and SDK_FAILURE on failure
    */
    int verifyResults();
};

#endif // BOX_FILTER_GL_SEPARABLE_H_