Esempio n. 1
0
        private static Color GetBestPixel(Color true_color, IColorAlgorithm algorithm, IJavaVersion mapping)
        {
            // partial transparency is not allowed
            if (true_color.A < 128)
            {
                return(Color.FromArgb(0, 0, 0, 0));
            }
            if (NearestColorCache.TryGetValue(true_color, out var cached))
            {
                return(cached);
            }
            Color  best_approximate = Color.Empty;
            double mindist          = Double.PositiveInfinity;

            // find the color in the palette that is closest to this one
            foreach (Color mapcolor in mapping.GetAllColors().Where(o => o.A == 255))
            {
                double distance = algorithm.Distance(true_color, mapcolor);
                if (mindist > distance)
                {
                    mindist          = distance;
                    best_approximate = mapcolor;
                }
            }
            NearestColorCache.Set(true_color, best_approximate);
            return(best_approximate);
        }
Esempio n. 2
0
        public static IEnumerable <JavaMap> FromSettings(MapCreationSettings settings)
        {
            Bitmap     original = ResizeImg(settings.Original, MAP_WIDTH * settings.SplitW, MAP_HEIGHT * settings.SplitH, settings.InterpMode);
            LockBitmap final    = new LockBitmap((Bitmap)original.Clone());

            final.LockBits();
            // first index = which map this is
            var colors = new byte[settings.SplitW * settings.SplitH][];

            for (int i = 0; i < colors.Length; i++)
            {
                colors[i] = new byte[MAP_WIDTH * MAP_HEIGHT];
            }

            #region java map algorithm
            for (int y = 0; y < final.Height; y++)
            {
                for (int x = 0; x < final.Width; x++)
                {
                    Color oldpixel = final.GetPixel(x, y);
                    Color newpixel = Color.Empty;
                    // partial transparency is not allowed
                    if (oldpixel.A < 128)
                    {
                        newpixel = Color.FromArgb(0, 0, 0, 0);
                    }
                    else
                    {
                        if (!NearestColorCache.TryGetValue(oldpixel, out newpixel))
                        {
                            double mindist = Double.PositiveInfinity;
                            // find the color in the palette that is closest to this one
                            foreach (Color mapcolor in ColorToByte.Keys.Where(o => o.A == 255))
                            {
                                double distance = ColorDistance(oldpixel, mapcolor);
                                if (mindist > distance)
                                {
                                    mindist  = distance;
                                    newpixel = mapcolor;
                                }
                            }
                            NearestColorCache[oldpixel] = newpixel;
                        }
                    }
                    final.SetPixel(x, y, newpixel);
                    if (settings.Dither)
                    {
                        // floyd-steinberg
                        int error_a = oldpixel.A - newpixel.A;
                        int error_r = oldpixel.R - newpixel.R;
                        int error_g = oldpixel.G - newpixel.G;
                        int error_b = oldpixel.B - newpixel.B;
                        GiveError(final, x + 1, y, error_a, error_r, error_g, error_b, 7);
                        GiveError(final, x - 1, y + 1, error_a, error_r, error_g, error_b, 3);
                        GiveError(final, x, y + 1, error_a, error_r, error_g, error_b, 5);
                        GiveError(final, x + 1, y + 1, error_a, error_r, error_g, error_b, 1);
                    }
                    int currentmap   = y / MAP_HEIGHT * settings.SplitW + x / MAP_WIDTH;
                    int currentpixel = MAP_WIDTH * (y % MAP_HEIGHT) + (x % MAP_WIDTH);
                    if (newpixel == Color.FromArgb(0, 0, 0, 0))
                    {
                        colors[currentmap][currentpixel] = 0x00;
                    }
                    else
                    {
                        colors[currentmap][currentpixel] = ColorToByte[newpixel];
                    }
                }
            }
            #endregion

            final.UnlockBits();

            var maps = new List <JavaMap>();
            for (int y = 0; y < settings.SplitH; y++)
            {
                for (int x = 0; x < settings.SplitW; x++)
                {
                    Rectangle crop = new Rectangle(
                        x * original.Width / settings.SplitW,
                        y * original.Height / settings.SplitH,
                        original.Width / settings.SplitW,
                        original.Height / settings.SplitH);
                    maps.Add(new JavaMap(
                                 CropImage(original, crop),
                                 CropImage(final.GetImage(), crop),
                                 colors[settings.SplitW * y + x]));
                }
            }
            return(maps);
        }