/// <summary>
/// Overload for <see cref="Render(Size, ImageInfo, IProgressBar, bool)"/>.
/// Use if a progress reporting isn't required
/// </summary>
public static Bitmap Render(Size bitmapSize, ImageInfo imageInfo)
{
return(Render(bitmapSize, imageInfo, progressBar: null, reportProgress: false));
}
private static void CalculatePixels(
byte[] pixels,
Size bitmapSize,
ImageInfo imageInfo,
int startRow,
int endRow,
int totalRows,
IProgressBar progressBar,
bool reportProgress)
{
double axisWidth = imageInfo.AxisWidth;
double planeHeight = imageInfo.AxisHeight;
var focusPoint = imageInfo.FocusPoint;
int bitmapWidth = bitmapSize.Width;
int bitmapHeight = bitmapSize.Height;
/* converts the pixel coordinate to the equivalent coordinate on the given
* portion of the complex plane. */
for (int row = startRow; row < endRow; row++)
{
for (int column = 0; column < bitmapSize.Width; column++)
{
// the real part of C will be the X coordinate
double c_real = ((column - bitmapWidth / 2) * axisWidth / bitmapWidth)
+ focusPoint.X;
// the imaginary part of C will be the Y coordinate
double c_im = (-(row - bitmapHeight / 2) * planeHeight / bitmapWidth)
+ focusPoint.Y;
double z_real = 0;
double z_im = 0;
int iteration = 0;
while (z_real * z_real + z_im * z_im < 4 && iteration < MAX_ITERATIONS)
{
double z_real_tmp = z_real * z_real - (z_im * z_im) + c_real;
z_im = 2 * z_real * z_im + c_im;
z_real = z_real_tmp;
iteration++;
}
Color color;
if (iteration < MAX_ITERATIONS)
{
color = ColorHelper.BLUE_BROWN[iteration % ColorHelper.BLUE_BROWN.Length];
}
else
{
color = Color.Black;
}
int i = ((row * bitmapWidth) + column) * COLORS_PER_PIXEL;
pixels[i] = color.B;
pixels[i + 1] = color.G;
pixels[i + 2] = color.R;
}
if (reportProgress && row % REPORT_ROW_INTERVAL == 0)
{
OnCalculatedRow(progressBar, totalRows);
}
}
}
