//========================================================================

//

// SplashScreen.h

//

//========================================================================

//========================================================================

//

// Modified under the Poppler project - http://poppler.freedesktop.org

//

// All changes made under the Poppler project to this file are licensed

// under GPL version 2 or later

//

// Copyright (C) 2009, 2018, 2020, 2021, 2025 Albert Astals Cid <aacid@kde.org>

//

// To see a description of the changes please see the Changelog file that

// came with your tarball or type make ChangeLog if you are building from git

//

//========================================================================

#ifndef SPLASHSCREEN_H

#define SPLASHSCREEN_H

#include "SplashTypes.h"

#include <cstdlib>

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

// SplashScreen

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

class SplashScreen

{

public:

    explicit SplashScreen(const SplashScreenParams *params);

    explicit SplashScreen(const SplashScreen *screen);

    ~SplashScreen();

    SplashScreen(const SplashScreen &) = delete;

    SplashScreen &operator=(const SplashScreen &) = delete;

    SplashScreen *copy() const { return new SplashScreen(this); }

    // Return the computed pixel value (0=black, 1=white) for the gray

    // level <value> at (<x>, <y>).

    int test(int x, int y, unsigned char value)

    {

        int xx, yy;

        if (mat == nullptr) {

            createMatrix();

        }

        xx = x & sizeM1;

        yy = y & sizeM1;

        return value < mat[(yy << log2Size) + xx] ? 0 : 1;

    }

private:

    void createMatrix();

    void buildDispersedMatrix(int i, int j, int val, int delta, int offset);

    void buildClusteredMatrix();

    int distance(int x0, int y0, int x1, int y1);

    void buildSCDMatrix(int r);

    const SplashScreenParams *screenParams; // params to create the other members

    unsigned char *mat; // threshold matrix

    int size; // size of the threshold matrix

    int sizeM1; // size - 1

    int log2Size; // log2(size)

};

#endif