Ejemplo n.º 1
0
        static public void DecodeTransparent(CBitReader s, Bitmap image, int width, int height, int depth)
        {
            int[] pr = new int[width];
            int[] pg = new int[width];
            int[] pb = new int[width];
            int[] pa = new int[width];

            for (int y = 0; y < height; y++)
            {
                int  r     = 0;
                int  g     = 0;
                int  b     = 0;
                int  a     = 0;
                int  dg    = 0;
                int  ta    = 0;
                bool f     = true;
                int  samea = 0;
                int  samef = 0;

                for (int x = 0; x < width;)
                {
                    if (--samea < 0)
                    {
                        ta += s.ReadSigned();

                        if (ta == 0)
                        {
                            int n = (int)s.ReadUnsigned();
                            for (int i = 0; i < n + 1; i++)
                            {
                                pr[x] = 0; pg[x] = 0; pb[x] = 0; pa[x] = 0;
                                image.SetPixel(x++, y, Color.FromArgb(0, 0, 0, 0));
                            }
                            continue;
                        }

                        if (ta == 32)
                        {
                            samea = (int)s.ReadUnsigned();
                        }

                        a = ta * 8;
                        if (a >= 256)
                        {
                            a = 255;
                        }
                    }

                    if (--samef < 0)
                    {
                        f = f ? false : true;

                        samef = (int)s.ReadUnsigned();

                        dg = 0;
                    }

                    if (f)
                    {
                        if (samea < samef)
                        {
                            pr[x] = r; pg[x] = g; pb[x] = b; pa[x] = a;
                            image.SetPixel(x++, y, Color.FromArgb(a, b, g, r));
                        }
                        else
                        {
                            if (samef > 0)
                            {
                                samea -= samef;
                            }

                            for (int i = 0; i < samef + 1; i++)
                            {
                                pr[x] = r; pg[x] = g; pb[x] = b; pa[x] = a;
                                image.SetPixel(x++, y, Color.FromArgb(a, b, g, r));
                            }
                            samef = 0;
                        }
                    }
                    else
                    {
                        if (s.ReadBit() == 1)
                        {
                            r     = pr[x]; g = pg[x]; b = pb[x];
                            pa[x] = a;
                            image.SetPixel(x++, y, Color.FromArgb(a, b, g, r));
                            dg = 0;
                        }
                        else
                        {
                            int tg = g + dg * 2;
                            if (tg < 0)
                            {
                                tg = 0;
                            }
                            if (tg > 255)
                            {
                                tg = 255;
                            }
                            tg -= g;
                            if (tg < -128)
                            {
                                tg += 256;
                            }
                            if (tg > 127)
                            {
                                tg -= 256;
                            }

                            dg = tg / 2 + s.ReadSigned();
                            if (dg < -128)
                            {
                                dg = -128;
                            }
                            if (dg > 127)
                            {
                                dg = 127;
                            }

                            r += dg * 2;
                            g += dg * 2;
                            b += dg * 2;

                            r += s.ReadSigned() * 2;
                            b += s.ReadSigned() * 2;

                            if (r > 255)
                            {
                                r = 255;
                            }
                            if (g > 255)
                            {
                                g = 255;
                            }
                            if (b > 255)
                            {
                                b = 255;
                            }
                            if (r < 0)
                            {
                                r = 0;
                            }
                            if (g < 0)
                            {
                                g = 0;
                            }
                            if (b < 0)
                            {
                                b = 0;
                            }

                            r &= 0xfe;
                            g &= 0xfe;
                            b &= 0xfe;

                            pr[x] = r; pg[x] = g; pb[x] = b; pa[x] = a;
                            image.SetPixel(x++, y, Color.FromArgb(a, b, g, r));
                        }
                    }
                }
            }
        }
Ejemplo n.º 2
0
        // Now this is basically 99% copied from alterdec

        static public void DecodeOpaque1(CBitReader s, Bitmap image, int width, int height, int depth)
        {
            int[] pr = new int[width];
            int[] pg = new int[width];
            int[] pb = new int[width];

            for (int y = 0; y < height; y++)
            {
                int count = -1;
                int r, g, b;
                int dr, dg, db;

                r  = g = b = 0;
                dr = dg = db = 0;

                for (int x = 0; x < width;)
                {
                    if (count == -1)
                    {
                        count = (int)s.ReadUnsigned();
                    }

                    if (s.ReadBit() == 1)
                    {
                        r  = pr[x]; g = pg[x]; b = pb[x];
                        dr = dg = db = 0;
                    }
                    else
                    {
                        int t = g + dg * 2;
                        if (t > 255)
                        {
                            t = 255;
                        }
                        if (t < 0)
                        {
                            t = 0;
                        }
                        t -= g;

                        dg = s.ReadSigned();

                        dg += t / 2;
                        if (dg < -128)
                        {
                            dg = -128;
                        }
                        if (dg > 127)
                        {
                            dg = 127;
                        }

                        db = dr = dg;
                        r += dr * 2;
                        g += dg * 2;
                        b += db * 2;

                        if (r > 255)
                        {
                            r = 255;
                        }
                        if (g > 255)
                        {
                            g = 255;
                        }
                        if (b > 255)
                        {
                            b = 255;
                        }
                        if (r < 0)
                        {
                            r = 0;
                        }
                        if (g < 0)
                        {
                            g = 0;
                        }
                        if (b < 0)
                        {
                            b = 0;
                        }

                        r += s.ReadSigned() * 2;
                        if (r > 255)
                        {
                            r = 255;
                        }
                        if (r < 0)
                        {
                            r = 0;
                        }

                        b += s.ReadSigned() * 2;
                        if (b > 255)
                        {
                            b = 255;
                        }
                        if (b < 0)
                        {
                            b = 0;
                        }
                    }

                    pr[x] = r; pg[x] = g; pb[x] = b;
                    image.SetPixel(x++, y, Color.FromArgb(b, g, r));

                    if (count-- == 0 && x < width)
                    {
                        int n = (int)s.ReadUnsigned() + 1;

                        for (int i = 0; i < n; i++)
                        {
                            pr[x] = r; pg[x] = g; pb[x] = b;
                            image.SetPixel(x++, y, Color.FromArgb(b, g, r));
                        }

                        dr = dg = db = 0;
                    }
                }
            }
        }