/// <summary>
/// Generates a new <see cref="DrawablesOutput"/> for this <see cref="Image"/>, using all the set properties.
/// </summary>
/// <returns>DrawablesOutput containing the Drawables for this image.</returns>
public DrawablesOutput Generate()
{
if (Image == null)
{
throw new DrawableException("Attempted to generate drawables for a disposed image object.");
}
Rgba32?ignore = IgnoreColor;
Image <Rgba32> b = _image.Clone();
if (FlipY)
{
b.Mutate(x => x.Flip(SixLabors.ImageSharp.Processing.FlipType.Vertical));
}
Point frameCount = new Point(
(int)Math.Ceiling((decimal)b.Width / DrawableWidth),
(int)Math.Ceiling((decimal)b.Height / DrawableHeight));
Drawable[,] drawables = new Drawable[frameCount.X, frameCount.Y];
Rgba32[,] template = GetTemplate();
Point imagePixel = new Point(0, 0);
// Add a drawable for every signplaceholder needed.
for (int frameWidth = 0; frameWidth < frameCount.X; frameWidth++)
{
for (int frameHeight = 0; frameHeight < frameCount.Y; frameHeight++)
{
imagePixel.X = frameWidth * DrawableWidth;
imagePixel.Y = frameHeight * DrawableHeight;
bool containsPixels = false;
StringBuilder directives = new StringBuilder("?replace");
for (int i = 0; i < DrawableWidth; i++)
{
for (int j = 0; j < DrawableHeight; j++)
{
int x = imagePixel.X,
y = imagePixel.Y++;
// Pixel falls within template but is outside of the supplied image.
if ((x > b.Width - 1 || y > b.Height - 1))
{
continue;
}
Rgba32 imageColor = b[Convert.ToInt32(x), Convert.ToInt32(y)];
// Pixel color is invisible or ignored.
if ((ignore.HasValue && imageColor.Equals(ignore)) || (imageColor.A == 0 && !ReplaceBlank))
{
continue;
}
else if (ReplaceWhite && imageColor.ToRGBAHexString() == "FFFFFFFF")
{
imageColor = new Rgba32(254, 254, 254, 255);
}
Rgba32 templateColor = template[i, j];
directives.AppendFormat(";{0}={1}", templateColor.ToRGBAHexString(), imageColor.ToRGBAHexString());
if (imageColor.A > 1)
{
containsPixels = true;
}
}
imagePixel.X++;
imagePixel.Y = frameHeight * DrawableHeight;
}
int xb = Convert.ToInt32(frameWidth * DrawableWidth),
yb = Convert.ToInt32(frameHeight * DrawableHeight);
if (containsPixels)
{
drawables[frameWidth, frameHeight] = new Drawable(directives.ToString(), xb, yb, DrawableTexture);
}
}
}
return(new DrawablesOutput(drawables, Image.Width, Image.Height, OffsetX, OffsetY));
}
