/// <summary>
/// Import a background image creating and writing a NSCR, NCGR and NCLR files to the streams passed.
/// </summary>
/// <param name="imgPath">Image path.</param>
/// <param name="mapStr">Map stream output.</param>
/// <param name="imgStr">Image stream output.</param>
/// <param name="palStr">Pal strream output.</param>
public void ImportBackground(EmguImage newImg, Stream mapStr, Stream imgStr, Stream palStr)
{
if (newImg == null)
throw new ArgumentNullException();
int width = newImg.Width;
int height = newImg.Height;
int maxColors = this.Format.MaxColors();
Pixel[] pixels;
Color[] palette;
List<int> mapPalette = new List<int>();
bool is16ColFixed = (Format == ColorFormat.Indexed_4bpp) &&
(PaletteMode == PaletteMode.Palette16_16) && (Quantization is FixedPaletteQuantization);
if (!is16ColFixed) {
// Quantizate image -> get pixels and palette
this.Quantization.Quantizate(newImg);
pixels = this.Quantization.GetPixels(this.PixelEncoding);
palette = this.Quantization.Palette;
if (palette.Length > maxColors)
throw new FormatException(string.Format("The image has more than {0} colors", maxColors));
} else {
Console.Write("(16 Color fixed!) ");
palette = this.Quantization.Palette;
ManyFixedPaletteQuantization quant = new ManyFixedPaletteQuantization(
this.Quantization.Palette.Split(16).ToArray());
List<Pixel> pixelList = new List<Pixel>();
for (int y = 0; y < newImg.Height; y += this.TileSize.Height) {
for (int x = 0; x < newImg.Width; x += this.TileSize.Width) {
Rectangle subArea = new Rectangle(x, y, this.TileSize.Width, this.TileSize.Height);
EmguImage subImage = newImg.Copy(subArea);
quant.Quantizate(subImage);
mapPalette.Add(quant.SelectedPalette);
pixelList.AddRange(quant.GetPixels(PixelEncoding.Lineal));
}
}
pixels = pixelList.ToArray();
}
// Create palette format
Nclr nclr = new Nclr() {
Extended = this.ExtendedPalette
};
nclr.SetData(palette, this.Format);
// Create map from pixels
Nscr nscr = new Nscr() {
TileSize = this.TileSize,
Width = width,
Height = height,
BgMode = this.BgMode,
PaletteMode = this.PaletteMode
};
if (!is16ColFixed) {
nscr.PaletteMode = (this.Format == ColorFormat.Indexed_4bpp) ?
PaletteMode.Palette16_16 : PaletteMode.Palette256_1;
pixels = nscr.CreateMap(pixels);
} else {
nscr.PaletteMode = PaletteMode.Palette16_16;
pixels = nscr.CreateMap(pixels, mapPalette.ToArray());
}
if (this.PartialImage) {
// As the image won't expand to all the screen,
// The first tile must be transparent
int tilesizeLength = this.TileSize.Width * this.TileSize.Height;
Pixel[] newPixels = new Pixel[pixels.Length + tilesizeLength];
// New transparent pixels
for (int i = 0; i < tilesizeLength; i++)
newPixels[i] = new Pixel(0, 255, true);
// Image pixels
Array.Copy(pixels, 0, newPixels, tilesizeLength, pixels.Length);
pixels = newPixels;
// Update map info
MapInfo[] mapInfo = nscr.GetMapInfo();
for (int i = 0; i < mapInfo.Length; i++) {
mapInfo[i] = new MapInfo(
mapInfo[i].TileIndex + 1,
mapInfo[i].PaletteIndex,
mapInfo[i].FlipX,
mapInfo[i].FlipY);
}
nscr.SetMapInfo(mapInfo);
}
// Create image format
Ncgr ncgr = new Ncgr() {
RegDispcnt = this.DispCnt,
Unknown = this.UnknownChar
};
ncgr.Width = (pixels.Length > 256) ? 256 : pixels.Length;
ncgr.Height = (int)Math.Ceiling(pixels.Length / (double)ncgr.Width);
if (ncgr.Height % this.TileSize.Height != 0)
ncgr.Height += this.TileSize.Height - (ncgr.Height % this.TileSize.Height);
ncgr.SetData(pixels, this.PixelEncoding, this.Format, this.TileSize);
// Write data
if (palStr != null)
nclr.Write(palStr);
if (imgStr != null)
ncgr.Write(imgStr);
if (mapStr != null)
nscr.Write(mapStr);
}
