public ExportImage(FractalParameters fp, RenderingParameters rp)
{
_fractalP = fp;
_renderP = rp;
InitializeComponent();
txtViewPosX.Text = _fractalP.viewPort.X.ToString();
txtViewPosY.Text = _fractalP.viewPort.Y.ToString();
txtViewWidth.Text = _fractalP.viewPort.Width.ToString();
txtViewHeight.Text = _fractalP.viewPort.Height.ToString();
}
public void generateImage(RenderingParameters rp, ParallelOptions po)
{
int pixelSize = 4;
BitmapData bd;
if (po == null)
po = new ParallelOptions();
else
po.CancellationToken.ThrowIfCancellationRequested();
// The image exist and has been created in the generate() function
bd = _resultImage.LockBits(new Rectangle(0, 0, _width, _height), System.Drawing.Imaging.ImageLockMode.WriteOnly, _resultImage.PixelFormat);
try
{
Parallel.For(0, _height, po, j =>
{
byte valR, valG, valB;
float val;
int posPixel = bd.Stride * j;
for (int i = 0; i < _width; i++)
{
/**
* Convert the iteration number in a byte => iteration space to image space
* result = log(iter) * contrast + brightness
* log(iter) has already been performed in the generation
* Do not perform boundary checking
**/
val = getValAt(i, j) * rp.contrast + rp.brightness;
valR = castFloatToByte(val * rp.RedParam, rp.RedExp);
valG = castFloatToByte(val * rp.GreenParam, rp.GreenExp);
valB = castFloatToByte(val * rp.BlueParam, rp.BlueExp);
_tabResultImage[posPixel + 0] = valB;
_tabResultImage[posPixel + 1] = valG;
_tabResultImage[posPixel + 2] = valR;
posPixel += pixelSize;
}
});
Marshal.Copy(_tabResultImage, 0, bd.Scan0, _height * bd.Stride);
}
catch (OperationCanceledException e) { throw e; }
finally
{
_resultImage.UnlockBits(bd);
}
}
