public static Color[] Create(FastBitmap fb)
{
if (fb == null)
{
throw new ArgumentNullException(nameof(fb));
}
var colors = new List <Color>();
for (int y = 0; y < fb.Height; y++)
{
for (int x = 0; x < fb.Width; x++)
{
var color = fb.GetPixel(x, y);
if (!colors.Contains(color))
{
colors.Add(color);
}
}
}
return(colors.ToArray());
}
/// <summary>
/// Draws a specified part of the tilemap on an image.
/// </summary>
/// <param name="fb">The image to draw the tilemap on.</param>
/// <param name="tileset">The tileset.</param>
public void Draw(FastBitmap fb, Tileset tileset, int srcX, int srcY, int srcWidth, int srcHeight)
{
if (fb == null || tileset == null)
{
throw new ArgumentNullException(fb == null ? nameof(fb) : nameof(tileset));
}
for (int y = srcY; y < srcY + srcHeight; y++)
{
for (int x = srcX; x < srcX + srcWidth; x++)
{
ref var tile = ref this[x, y];
ref var sprite = ref tileset[tile.Index];
for (int j = 0; j < 8; j++)
{
for (int k = 0; k < 8; k++)
{
var dstX = x * 8 + (tile.FlipX ? 7 - k : k);
var dstY = y * 8 + (tile.FlipY ? 7 - j : j);
fb.SetPixel(dstX, dstY, tileset.Palette[sprite[k, j]]);
}
}
}
/// <summary>
/// Draws the tilemap on an image.
/// </summary>
/// <param name="fb">The image to draw the tilemap on.</param>
/// <param name="tileset">The tileset.</param>
public void Draw(FastBitmap fb, Tileset tileset)
{
Draw(fb, tileset, 0, 0, width, height);
}
/// <summary>
/// Initializes a new instance of the <see cref="Tileset"/> class from the specified source image.
/// </summary>
/// <param name="source">The source image.</param>
public Tileset(Bitmap source)
{
if (source.Width < 8 || source.Height < 8)
{
throw new ArgumentException("Image must be at least 8x8 pixels.", nameof(source));
}
if (source.Width / 8 * source.Height / 8 > 0x400)
{
throw new ArgumentException("Image is too large, ensure it has no more than 0x400 (1024) tiles.", nameof(source));
}
// Create the tiles
var width = source.Width / 8;
var height = source.Height / 8;
tiles = new Tile[width * height];
// Copy image data from source
using (var fb = FastBitmap.FromImage(source))
{
if ((source.PixelFormat & PixelFormat.Indexed) == PixelFormat.Indexed)
{
// Copy the colors from the existing palette
switch (source.PixelFormat)
{
case PixelFormat.Format1bppIndexed:
palette = new Color[1 << 1];
break;
case PixelFormat.Format4bppIndexed:
palette = new Color[1 << 4];
break;
case PixelFormat.Format8bppIndexed:
palette = new Color[1 << 8];
break;
default:
throw new ArgumentException("Unsupported image format.", nameof(source));
}
source.Palette.Entries.CopyTo(palette, 0);
// Copy the tiles
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
ref var tile = ref tiles[x + y * width];
for (int j = 0; j < 8; j++)
{
for (int i = 0; i < 8; i++)
{
// Find the color index
var index = palette.IndexOf(Color.FromArgb(fb.Bits[(x * 8 + i) + (y * 8 + j) * fb.Width]));
if (index < 0)
{
throw new IndexOutOfRangeException();
}
// Copy to the tile
tile[i, j] = index;
}
}
}
}
}
