private void DisplayNewBitmap(BitmapInfo bitmapInfo)
{
BmpMaker bmpMaker = new BmpMaker(bitmapInfo.PixelWidth, bitmapInfo.PixelHeight);
int index = 0;
for (int row = 0; row < bitmapInfo.PixelHeight; row++)
{
for (int col = 0; col < bitmapInfo.PixelWidth; col++)
{
int iterationCount = bitmapInfo.IterationCounts[index++];
if (iterationCount == -1)
{
bmpMaker.SetPixel(row, col, 0, 0, 0);
}
else
{
double proportion = (iterationCount / 32.0) % 1;
if (proportion < 0.5)
{
bmpMaker.SetPixel(row, col, (int)(255 * (1 - 2 * proportion)), 0, (int)(255 * 2 * proportion));
}
else
{
proportion = 2 * (proportion - 0.5);
bmpMaker.SetPixel(row, col, 0, (int)(255 * proportion), (int)(255 * (1 - proportion)));
}
}
}
}
image.Source = bmpMaker.Generate();
}
async void OnCalculateButtonClicked(object sender, EventArgs args)
{
// Configure the UI for a background process.
calculateButton.IsEnabled = false;
cancelButton.IsEnabled = true;
cancelTokenSource = new CancellationTokenSource();
try
{
// Render the Mandelbrot set on a bitmap.
BmpMaker bmpMaker = await CalculateMandelbrotAsync(progressReporter,
cancelTokenSource.Token);
image.Source = bmpMaker.Generate();
}
catch (OperationCanceledException)
{
calculateButton.IsEnabled = true;
progressBar.Progress = 0;
}
catch (Exception)
{
// Shouldn't occur in this case.
}
cancelButton.IsEnabled = false;
}
public MandelbrotXFPage()
{
InitializeComponent();
mandelbrotViewModel = new MandelbrotViewModel(2.5, 2.5)
{
PixelWidth = 1000,
PixelHeight = 1000,
CurrentCenter = new Complex(GetProperty("CenterReal", -0.75), GetProperty("CenterImaginary", 0.0)),
CurrentMagnification = GetProperty("Magnification", 1.0),
TargetMagnification = GetProperty("Magnification", 1.0),
Iterations = GetProperty("Iterations", 8),
RealOffset = 0.5,
ImaginaryOffset = 0.5
};
BindingContext = mandelbrotViewModel;
mandelbrotViewModel.PropertyChanged += OnMandelbrotViewModelPropertyChanged;
BmpMaker bmpMaker = new BmpMaker(120, 120);
testImage.SizeChanged += (sender, args) =>
{
pixelsPerUnit = bmpMaker.Width / testImage.Width;
SetPixelWidthAndHeight();
};
testImage.Source = bmpMaker.Generate();
Device.StartTimer(TimeSpan.FromMilliseconds(100), () =>
{
realCrossHair.Opacity -= 0.01f;
imageCrossHair.Opacity -= 0.01f;
return(true);
});
}
async void OnCalculateButtonClicked(object sender, EventArgs e)
{
calculateButton.IsEnabled = false;
BmpMaker bmpMaker = await CalculateMandelbrotAsync(progressReporter);
image.Source = bmpMaker.Generate();
}
async void OnCalculateButtonClicked(object sender, EventArgs args)
{
// Configure the UI for a background process.
calculateButton.IsEnabled = false;
// Render the Mandelbrot set on a bitmap.
BmpMaker bmpMaker = await CalculateMandelbrotAsync(progressReporter);
image.Source = bmpMaker.Generate();
}
private async void OnCalculateButtonClicked(object sender, EventArgs e)
{
calculateButton.IsEnabled = false;
activityIndicator.IsRunning = true;
BmpMaker bmpMaker = new BmpMaker(pixelWidth, pixelHeight);
await CalculateMandelbrotAsync(bmpMaker);
image.Source = bmpMaker.Generate();
activityIndicator.IsRunning = false;
}
async void OnCalculateButtonClicked(object sender, EventArgs args)
{
// Configure the UI for a background process.
calculateButton.IsEnabled = false;
activityIndicator.IsRunning = true;
// Render the Mandelbrot set on a bitmap.
BmpMaker bmpMaker = new BmpMaker(pixelWidth, pixelHeight);
await CalculateMandelbrotAsync(bmpMaker);
image.Source = bmpMaker.Generate();
// Configure the UI for the completed background process.
activityIndicator.IsRunning = false;
}
void DisplayNewBitmap(BitmapInfo bitmapInfo)
{
// Create the bitmap.
BmpMaker bmpMaker = new BmpMaker(bitmapInfo.PixelWidth, bitmapInfo.PixelHeight);
// Set the colors.
int index = 0;
for (int row = 0; row < bitmapInfo.PixelHeight; row++)
{
for (int col = 0; col < bitmapInfo.PixelWidth; col++)
{
int iterationCount = bitmapInfo.IterationCounts[index++];
// In the Mandelbrot set: Color black.
if (iterationCount == -1)
{
bmpMaker.SetPixel(row, col, 0, 0, 0);
}
// Not in the Mandelbrot set: Pick a color based on count.
else
{
double proportion = (iterationCount / 32.0) % 1;
if (proportion < 0.5)
{
bmpMaker.SetPixel(row, col, (int)(255 * (1 - 2 * proportion)),
0,
(int)(255 * 2 * proportion));
}
else
{
proportion = 2 * (proportion - 0.5);
bmpMaker.SetPixel(row, col, 0,
(int)(255 * proportion),
(int)(255 * (1 - proportion)));
}
}
}
}
image.Source = bmpMaker.Generate();
}
public MandelbrotXFPage()
{
InitializeComponent();
// Instantiate ViewModel and get saved values.
mandelbrotViewModel = new MandelbrotViewModel(2.5, 2.5)
{
PixelWidth = 1000,
PixelHeight = 1000,
CurrentCenter = new Complex(GetProperty("CenterReal", -0.75),
GetProperty("CenterImaginary", 0.0)),
CurrentMagnification = GetProperty("Magnification", 1.0),
TargetMagnification = GetProperty("Magnification", 1.0),
Iterations = GetProperty("Iterations", 8),
RealOffset = 0.5,
ImaginaryOffset = 0.5
};
// Set BindingContext on page.
BindingContext = mandelbrotViewModel;
// Set PropertyChanged handler on ViewModel for "manual" processing.
mandelbrotViewModel.PropertyChanged += OnMandelbrotViewModelPropertyChanged;
// Create test image to obtain pixels per device-independent unit.
BmpMaker bmpMaker = new BmpMaker(120, 120);
testImage.SizeChanged += (sender, args) =>
{
pixelsPerUnit = bmpMaker.Width / testImage.Width;
SetPixelWidthAndHeight();
};
testImage.Source = bmpMaker.Generate();
// Gradually reduce opacity of cross-hairs.
Device.StartTimer(TimeSpan.FromMilliseconds(100), () =>
{
realCrossHair.Opacity -= 0.01;
imagCrossHair.Opacity -= 0.01;
return(true);
});
}
public DiyGradientBitmapPage()
{
InitializeComponent();
int rows = 128;
int cols = 64;
BmpMaker bmpMaker = new BmpMaker(cols, rows);
for (int row = 0; row < rows; row++)
{
for (int col = 0; col < cols; col++)
{
bmpMaker.SetPixel(row, col, 2 * row, 0, 2 * (128 - row));
}
}
ImageSource imageSource = bmpMaker.Generate();
image.Source = imageSource;
}
async void OnCalculateButtonClicked(object sender, EventArgs e)
{
calculateButton.IsEnabled = false;
cancelButton.IsEnabled = true;
cancelTokenSource = new CancellationTokenSource();
try
{
BmpMaker bmpMaker = await CalculateMandelbrotAsync(progressReporter, cancelTokenSource.Token);
image.Source = bmpMaker.Generate();
}
catch (OperationCanceledException)
{
calculateButton.IsEnabled = true;
progressBar.Progress = 0;
}
catch (Exception)
{
}
cancelButton.IsEnabled = false;
}