public static byte[] ReduceLine(Color32[] line, Color[] palette,Dictionary<int,int> dic=null)
{
var res = new byte[line.Length];
if (dic == null)
dic = new Dictionary<int, int>(); // Color, index
else
if (dic.Count > 4096) dic.Clear();
var ac = -1;
byte ai = 0;
for (var f = 0; f < line.Length; f++)
{
var c = ((Color)line[f]).ToArgb();
if (c == ac) res[f] = ai;
if (!dic.ContainsKey(c))
{
var i = ((Color)line[f]).NearestColor(palette);
dic[c] = i;
ac = c;
ai = (byte)i;
res[f] = ai;
}
else
res[f] = (byte)dic[c];
}
return res;
}
public static Color32 operator <<(Color32 a, int b)
{
var res = new Color32();
res.A = 255;
res.R = (byte)(a.R << b);
res.G = (byte)(a.G << b);
res.B = (byte)(a.B << b);
return res;
}
public static void Pixels32ToLine(this BitmapData bmpdata, int line, Color32[] pixels)
{
var ptr = bmpdata.ScanLine(line);
Pixels32ToLine(ptr, pixels);
}
public static void PixelsToBitmap32(this Bitmap image, Color32[][] pixels)
{
var sz = image.Size;
var szpx = new Size(pixels[0].Length, pixels.Length);
if (sz != szpx) throw new ArgumentException("Bad size error");
var r1 = new Rectangle(Point.Empty, sz);
var bmpdata = image.LockBits(new Rectangle(Point.Empty, sz), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
var linea = bmpdata.Scan0;
foreach (var l in pixels)
{
Pixels32ToLine(linea, l);
linea += bmpdata.Stride;
}
image.UnlockBits(bmpdata);
}
public static void Pixels32ToLine(IntPtr line, Color32[] pixels)
{
GCHandle pinnedArray = GCHandle.Alloc(pixels, GCHandleType.Pinned);
IntPtr pointer = pinnedArray.AddrOfPinnedObject();
CopyMemory(line, pointer, (uint)pixels.Length * 4);
pinnedArray.Free();
}
public static Color32[] LineToPixels32(this BitmapData bmpdata, IntPtr line)
{
var l = new Color32[bmpdata.Width];
GCHandle pinnedArray = GCHandle.Alloc(l, GCHandleType.Pinned);
IntPtr pointer = pinnedArray.AddrOfPinnedObject();
CopyMemory(pointer, line, (uint)bmpdata.Width * 4);
pinnedArray.Free();
return l;
}
public static Color32 BitWideMask(int bit,int code=8)
{
var res = new Color32();
res.A = 255;
if (bit < 0) return res;
if ((code & 0x4) != 0) res.R = (byte)((2 << bit)-1);
if ((code & 0x2) != 0) res.G = (byte)((2 << bit)-1);
if ((code & 0x1) != 0) res.B = (byte)((2 << bit)-1);
return res;
}
public static Color32 BitMask(int bit,int code=7)
{
var res = new Color32();
res.A = 255;
if (bit > 7) return res;
if ((code&0x4)!=0) res.R = (byte)(1 << bit);
if ((code & 0x2) != 0) res.G = (byte)(1 << bit);
if ((code & 0x1) != 0) res.B = (byte)(1 << bit);
return res;
}
public static Color32 operator >>(Color32 a, int b)
{
var res = new Color32();
res.A = 255;
res.R = (byte)(a.R >> b);
res.G = (byte)(a.G >> b);
res.B = (byte)(a.B >> b);
return res;
}