public void Render(Image image, Drawable drawable)
{
if (image.Selection.Empty)
{
return;
}
image.UndoGroupStart();
Tile.CacheDefault(drawable);
var temp = image.Duplicate();
var imageRect = image.Bounds;
var layerPixels = LayerToArray(imageRect, drawable);
//temp.Selection.Border(1);
bool selectionNonEmpty;
var selectionBounds = temp.Selection.Bounds(out selectionNonEmpty);
var selectionMask = new SelectionMask(temp.Selection);
//var progress = new Progress(_("Filling the region..."));
var initArea = selectionMask.Area;
//init confidance term
//TODO throw out rgniterator from here
var pxConfidenceTerm = RegionHelper.FilledMatrix(image.Width, image.Height, 1.0);
var iter = new RgnIterator(image.Selection, RunMode.Noninteractive);
iter.IterateSrc(pixel => pxConfidenceTerm[pixel.X, pixel.Y] = selectionMask[pixel.X, pixel.Y] ? 0 : 1);
int iteration = 0;
while (!selectionMask.Empty && iteration < _iterations)
{
// initial selection border / target region
var selectionBorder =
RegionHelper.TraceBorder(selectionBounds,
coord => selectionMask[coord.X, coord.Y])
.ToList();
var borderConfidanceValues = NewConfidanceValue(selectionBorder, pxConfidenceTerm, _windowSize);
var borderGradientValues = GradientValues(selectionBorder, layerPixels, selectionMask, _windowSize).ToList();
var borderNormals = NormalVectors.CalculateNormals(selectionBorder);
var borderDataTerms = borderGradientValues.Zip(borderNormals, ComputeDataTerm);
var borderPriorities = borderConfidanceValues.Zip(borderDataTerms, (c, d) => c * d)
.ToArray();
var currentIndex = borderPriorities.MaxIndex();
var currentPoint = selectionBorder[currentIndex];
var currentRect = currentPoint.PointCenteredRectangle(_windowSize);
var currentRegion = new PixelRgn(drawable, currentRect, true, true);
var minRgnRect = _pixelDistanceCalc.MinDistanceRegion(currentRect, borderGradientValues[currentIndex], layerPixels,
selectionMask);
var minRgn = new PixelRgn(drawable, minRgnRect, false, false);
var iterator = new RegionIterator(currentRegion, minRgn);
iterator.ForEach((targetPixel, srcPixel) =>
{
if (!selectionMask[targetPixel.X, targetPixel.Y])
{
return;
}
layerPixels[targetPixel.X, targetPixel.Y] = srcPixel;
targetPixel.Set(srcPixel);
});
drawable.Flush();
drawable.MergeShadow(true);
drawable.Update(temp.Selection.MaskBounds);
//update confidance values
var currentCoords =
RegionHelper.Grid(currentRect).Where(coord => selectionMask[coord.X, coord.Y]).ToArray();
var newConfidanceValues = NewConfidanceValue(currentCoords, pxConfidenceTerm, _windowSize).ToArray();
foreach (var point in
currentCoords.Zip(newConfidanceValues,
(coordinate, confidance) =>
new {Coordinate = coordinate, Confidance = confidance}))
{
pxConfidenceTerm[point.Coordinate.X, point.Coordinate.Y] = point.Confidance;
}
// exclude current region pixels from selection
selectionMask.SetAreaToZero(currentRect);
//progress.Update((initArea - selectionMask.Area)/(double) initArea);
iteration++;
if (iteration == _iterations)
{
selectionBorder =
RegionHelper.TraceBorder(selectionBounds,
coord => selectionMask[coord.X, coord.Y])
.ToList();
var rgn = new PixelRgn(drawable, selectionBounds, true, true);
for (int i = 0; i < selectionBorder.Count; i++)
{
var coord = selectionBorder[i];
rgn.SetPixel(new byte[] { (byte)(255), 0, 0, 255 }, coord.X, coord.Y);
}
drawable.Flush();
drawable.MergeShadow(false);
drawable.Update(temp.Selection.MaskBounds);
}
}
temp.Delete();
image.UndoGroupEnd();
}
