/// <summary>
/// Creates a new <see cref="Sprite"/> from an indexed bitmap.
/// </summary>
/// <param name="bmp"></param>
public Sprite(Bitmap bmp)
{
// TODO: maybe help the user out and index their image for them
if (bmp.PixelFormat != PixelFormat.Format4bppIndexed && bmp.PixelFormat != PixelFormat.Format8bppIndexed)
{
throw new Exception($"Source image is not indexed! {bmp.PixelFormat}");
}
// ensure bitmap size
if (bmp.Width % 8 != 0 || bmp.Height % 8 != 0)
{
throw new Exception("Source image dimensions are not divisible by 8!");
}
// lock the bits of the bitmap
BitmapData bmpData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, bmp.PixelFormat);
// create tiles
int width = bmp.Width / 8;
int height = bmp.Height / 8;
tiles = new Tile[width * height];
for (int i = 0; i < tiles.Length; i++)
{
tiles[i] = new Tile();
}
// copy pixel data
if (bmp.PixelFormat == PixelFormat.Format4bppIndexed)
{
//palette = new Palette(16);
bitDepth = BitDepth.Four;
// copy the source data to a byte buffer
byte[] buffer = new byte[bmp.Width * bmp.Height / 2];
Marshal.Copy(bmpData.Scan0, buffer, 0, buffer.Length);
// copy pixel data
int x = 0; // current x-position in tile
int y = 0; // current y-position in tile
int a = 0; // current x-position of tile
int b = 0; // current y-position of tile
for (int i = 0; i < bmp.Width * bmp.Height / 2; i++)
{
// 4BPP: two pixels per byte
tiles[a + b * width].SetPixel(x++, y, buffer[i] >> 4); // left
tiles[a + b * width].SetPixel(x++, y, buffer[i] & 0xF); // right
// move forward positions
if (x >= 8)
{
x = 0;
a++;
}
if (a >= width)
{
a = 0;
y++;
}
if (y >= 8)
{
y = 0;
b++;
}
}
}
else if (bmp.PixelFormat == PixelFormat.Format8bppIndexed)
{
// above, modified for 8BPP (one pixel per byte)
//palette = new Palette(256);
bitDepth = BitDepth.Eight;
byte[] buffer = new byte[bmp.Width * bmp.Height];
Marshal.Copy(bmpData.Scan0, buffer, 0, buffer.Length);
int x = 0;
int y = 0;
int a = 0;
int b = 0;
for (int i = 0; i < bmp.Width * bmp.Height; i++)
{
tiles[a + b * width].SetPixel(x++, y, buffer[i]);
if (x >= 8)
{
x = 0;
a++;
}
if (a >= width)
{
a = 0;
y++;
}
if (y >= 8)
{
y = 0;
b++;
}
}
}
// unlock the bitmap
bmp.UnlockBits(bmpData);
}
/// <summary>
/// Creates a new <see cref="Sprite"/> of the given size (in tiles) and bit depth.
/// </summary>
/// <param name="width">The width in tiles.</param>
/// <param name="height">The height in tiles.</param>
/// <param name="bitDepth">The bit depth.</param>
public Sprite(int width, int height, BitDepth bitDepth)
{
this.tiles = new Tile[width * height];
this.bitDepth = bitDepth;
}
/// <summary>
/// Creates a new <see cref="Sprite"/> for the given tiles and bit depth.
/// </summary>
/// <param name="tiles">The source tile data.</param>
/// <param name="bitDepth">The bit depth.</param>
public Sprite(Tile[] tiles, BitDepth bitDepth)
{
this.tiles = tiles;
this.bitDepth = bitDepth;
}
/// <summary>
/// Initializes a new instance of the <see cref="Palette"/> class
/// for the specified bit depth.
/// </summary>
/// <param name="color">The color to repeat.</param>
/// <param name="bitDepth">The bit depth.</param>
public Palette(GbaColor color, BitDepth bitDepth)
: this(color, (int)bitDepth)
{
}