/// <summary>
/// Gets a subimage from the image.
/// </summary>
/// <returns>The sub image.</returns>
/// <param name="x">The x coordinate.</param>
/// <param name="y">The y coordinate.</param>
/// <param name="w">The width.</param>
/// <param name="h">The height.</param>
public Image8i GetSubimage(uint x, uint y, uint w, uint h)
{
if (x >= Width || y >= Height) throw new ArgumentOutOfRangeException("x or y", "Out of image.");
Image8i ret = new Image8i(w, h, ChannelFormat);
ret.Draw(-(int)x, -(int)y, this);
return ret;
}
private Image8i Render(int width, int height, string onlyLayer)
{
Image8i ret = new Image8i((uint)width, (uint)height, ChannelFormat.RGBA);
ret = ret.ToAlphaInvertedImage();
foreach (LayerData i in Layers)
{
if (onlyLayer == "")
{
if (i.name == "Collision") continue;
}
else
{
if (i.name != onlyLayer) continue;
}
for (int y = 0; y < i.height; y++)
{
for (int x = 0; x < i.width; x++)
{
int number = i.data[x, y];
if (number <= 0) continue;
Image8i Tile = GetTile(number);
int CorFactorX = 0;
int CorFactorY = (int)(Tile.Height - TileHeight);
ret.Draw(x * TileWidth - CorFactorX, y * TileHeight - CorFactorY, Tile, true);
}
}
}
return ret;
}