public uint[] GetUsedColors(bool forceUpdate = false)
{
if (usedColors != null && !forceUpdate)
{
return(usedColors.ToArray());
}
usedColors = new List <uint>();
for (int c = 0; c < data.Length; c += 4)
{
uint color = Palette.RGBToPalette(data[c], data[c + 1], data[c + 2]);
int r = (int)(color & 0b0000_0000_0000_0000_1111_1111);
int g = (int)(color >> 8 & 0b0000_0000_0000_0000_1111_1111);
int b = (int)(color >> 16 & 0b0000_0000_0000_0000_1111_1111);
if (!usedColors.Contains(color))
{
usedColors.Add(color);
usedColors.Sort();
}
}
return(usedColors.ToArray());
}
private byte[] WriteImageDataWithNoEncoding(byte[] data, int pos, int length)
{
List <byte> newData = new List <byte>();
for (int i = 0; i < length; i += 4)
{
int value;
byte red = data[i + 0];
byte green = data[i + 1];
byte blue = data[i + 2];
byte alpha = data[i + 3];
value = palette.GetIndex(paletteOffset, Palette.RGBToPalette(red, green, blue));
if (value == -1)
{
Console.WriteLine($"Invalid color - not found in the palette! Color: R:{red}, G:{green}, B:{blue}");
}
value = value - paletteOffset;
if (value >= 252)
{
Console.WriteLine("Invalid color - not found in the palette!");
}
newData.Add((byte)value);
}
return(newData.ToArray());
}
private byte[] CreateImageDataWithRunLengthEncoding(byte[] data, int length)
{
List <byte> newData = new List <byte>();
int dataLength = 0;
for (int i = 0; i < length; i += 4)
{
int value = 0;
byte red = data[i + 0];
byte green = data[i + 1];
byte blue = data[i + 2];
byte alpha = data[i + 3];
bool valueIsOperator = false;
if (red == 255 && green + blue == 0)
{
value = 0;//transparent
valueIsOperator = true;
}
else if (green == 255 && red + blue == 0)
{
value = 1;//shadow
valueIsOperator = true;
}
else
{
value = palette.GetIndex(paletteOffset, Palette.RGBToPalette(red, green, blue));
value = value - paletteOffset;
value = Math.Max((byte)2, (byte)value);
}
int count = 1;
newData.Add((byte)value);
dataLength += 1;
if (valueIsOperator == true)
{
int offset = 0;
count = GetSameValueCount(ref data, i, value, ref offset);
newData.Add((byte)count);
i = offset;
dataLength += 1;
}
}
return(newData.ToArray());
}
