public static void WriteImageToStream(Image source, Stream fs, PixelFormat pixelFormat)
{
for (var y = 0; y < source.Height; y += 8)
{
for (var x = 0; x < source.Width; x += 8)
{
EncodeTile(8, 8, 0, 0, source, fs, pixelFormat);
}
}
}
private static void EncodeTile(int iconSize, int tileSize, int ax, int ay, Image bmp, Stream fs, PixelFormat pixelFormat)
{
if (tileSize == 0)
{
EncodeColor(bmp.GetPixel(ax, ay), pixelFormat, TempBytes);
fs.Write(TempBytes, 0, PixelFormatBytes(pixelFormat));
}
else
{
for (var y = 0; y < iconSize; y += tileSize)
{
for (var x = 0; x < iconSize; x += tileSize)
{
EncodeTile(tileSize, tileSize / 2, x + ax, y + ay, bmp, fs, pixelFormat);
}
}
}
}
private static void DecodeTile(int iconSize, int tileSize, int ax, int ay, Image bmp, Stream fs, PixelFormat pixelFormat)
{
if (tileSize == 0)
{
fs.Read(TempBytes, 0, 2);
bmp.SetPixel(ax, ay, DecodeColor((TempBytes[1] << 8) + TempBytes[0], pixelFormat));
}
else
{
for (var y = 0; y < iconSize; y += tileSize)
{
for (var x = 0; x < iconSize; x += tileSize)
{
DecodeTile(tileSize, tileSize / 2, x + ax, y + ay, bmp, fs, pixelFormat);
}
}
}
}
public static Image ReadImageFromStream(Stream fs, int width, int height, PixelFormat pixelFormat)
{
Image image = new Image
{
Width = width,
Height = height,
Comp = 4,
Data = new byte[width * height * 4]
};
for (var y = 0; y < height; y += 8)
{
for (var x = 0; x < width; x += 8)
{
DecodeTile(8, 8, x, y, image, fs, pixelFormat);
}
}
return(image);
}
