/// <summary>
/// Calculate and generate the fractalpart pixels and store in pixels array
/// </summary>
private async void generateFractalPart(FractalPart part, FractalTemplate.FractalTemplate fractal, Action<FractalPart> callback)
{
part.imageArray = new byte[part.getWidth() * part.getHeight() * 4];
//Call the calculat fractal method
int[,] pixels = fractal.calculate(part);
//Generate bitmap from pixeldata
int x = 0;
int y = 0;
for (int i = 0; i < part.imageArray.Length; i += 4)
{
//BGRA format
int R = 0, G = 0, B = 0;
if (fractal.getColor().R != 0 && fractal.getColor().G != 0 && fractal.getColor().B != 0)
{
R = pixels[x, y] % this.fractal.getColor().R;
G = pixels[x, y] % this.fractal.getColor().G;
B = pixels[x, y] % this.fractal.getColor().B;
}
else
{
R = pixels[x, y];
G = pixels[x, y];
B = pixels[x, y];
}
part.imageArray[i] = Convert.ToByte(B); //blue
part.imageArray[i + 1] = Convert.ToByte(G); //green
part.imageArray[i + 2] = Convert.ToByte(R); //red
part.imageArray[i + 3] = 255; // Alpha
x++;
if (x == part.getWidth())
{
y++;
x = 0;
}
}
//Callback to UI thread when generating is done, add to list and refresh current fractal parts on screen
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
//callback to notify we are done
callback(part);
});
}
/// <summary>
/// UI Thrad callback when generating fractal part is done
/// Part will be converted to bitmap and added to UI
/// </summary>
public async Task addFractalPartToUIAsync(FractalPart part)
{
Windows.UI.Xaml.Controls.Image img = sp.Children[part.getPos()] as Windows.UI.Xaml.Controls.Image;
WriteableBitmap w = new WriteableBitmap(part.getWidth(), part.getHeight());
using (Stream stream = w.PixelBuffer.AsStream()) { await stream.WriteAsync(part.imageArray, 0, part.imageArray.Length); }
img.Source = w;
}
