/// <summary>
/// Read the 8-bit image into a 2D byte array.
/// </summary>
/// <param name="index">Current file reading index.</param>
private void ReadPictureX0(ref int index)
{
uint length = BitConverter.ToUInt16(_bytes, index); index += 2;
int width = BitConverter.ToUInt16(_bytes, index); index += 2;
int height = BitConverter.ToUInt16(_bytes, index); index += 2;
_picture256?.Dispose();
_picture256 = new Bytemap(width, height);
byte[] image = DecodePicture(ref index, length);
int c = 0;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
if (image.Length <= c)
{
_picture256[x, y] = 0;
continue;
}
_picture256[x, y] = image[c++];
}
}
}
public static IBitmap AddLayer(this IBitmap bitmap, Bytemap layer, int left = 0, int top = 0, bool dispose = false)
{
if (layer == null)
{
return(bitmap);
}
for (int yy = 0; yy < layer.Height; yy++)
{
if (top + yy >= bitmap.Height())
{
break;
}
if (bitmap.OutBoundY(top + yy))
{
continue;
}
for (int xx = 0; xx < layer.Width; xx++)
{
if (left + xx >= bitmap.Width())
{
break;
}
if (layer[xx, yy] == 0 || bitmap.OutBoundX(left + xx))
{
continue;
}
bitmap.Bitmap[left + xx, top + yy] = layer[xx, yy];
}
}
if (dispose)
{
layer.Dispose();
}
return(bitmap);
}
/// <summary>
/// Read the 4-bit image into a 2D byte array.
/// </summary>
/// <param name="index">Current file reading index.</param>
private void ReadPictureX1(ref int index)
{
uint length = BitConverter.ToUInt16(_bytes, index); index += 2;
int width = BitConverter.ToUInt16(_bytes, index); index += 2;
int height = BitConverter.ToUInt16(_bytes, index); index += 2;
_picture16?.Dispose();
_picture16 = new Bytemap(width, height);
byte[] image = DecodePicture(ref index, length);
int c = 0;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
_picture16[x++, y] = (byte)(image[c] & 0x0F);
_picture16[x, y] = (byte)((image[c++] & 0xF0) >> 4);
}
}
}
public void Clear()
{
_bitmap?.Dispose();
_bitmap = null;
}
public void Dispose()
{
_bitmap.Dispose();
}