public LuaArgs replace(LuaArgs args)
{
var inColor = args.GetByte(0);
var outColor = args.GetByte(1);
CheckWritable();
Image.Replace(inColor, outColor);
return(LuaArgs.Empty);
}
public LuaArgs write(LuaArgs args)
{
int x = args.GetInt(0);
int y = args.GetInt(1);
if (args.IsNumber(2))
{
var n = args.GetByte(2);
CheckWritable();
if (x >= 0 && x < Image.Width &&
y >= 0 && y < Image.Height)
{
Image[x, y] = n;
}
return(LuaArgs.Empty);
}
else
{
var bytes = args.GetByteString(2);
if (x < 0 || x >= Image.Width ||
y < 0 || y >= Image.Height ||
(x + y * Image.Width + bytes.Length) > Image.Width * Image.Height)
{
throw new LuaError("Write must start and end within the image bounds");
}
CheckWritable();
Image.Write(bytes, 0, bytes.Length, x, y);
return(LuaArgs.Empty);
}
}
public LuaArgs fill(LuaArgs args)
{
var color = args.GetByte(0);
if (args.IsNil(1))
{
CheckWritable();
Image.Fill(color);
}
else
{
int x = args.GetInt(1);
int y = args.GetInt(2);
int w = args.GetInt(3);
int h = args.GetInt(4);
if (w < 0)
{
throw new LuaError("Fill width must be positive");
}
if (h < 0)
{
throw new LuaError("Fill height must be positive");
}
if (x < 0 || x + w > Image.Width ||
y < 0 || y + h > Image.Height)
{
throw new LuaError("Fill must start and end within the image bounds");
}
CheckWritable();
Image.Fill(color, x, y, w, h);
}
return(LuaArgs.Empty);
}
public LuaArgs translate(LuaArgs args)
{
var x = args.GetInt(0);
var y = args.GetInt(1);
var fillColor = args.IsNil(2) ? (byte)0 : args.GetByte(2);
CheckWritable();
Image.Translate(x, y, fillColor);
return(LuaArgs.Empty);
}