/// <inheritdoc/> protected override void OnApply(ImageBase <TColor> source, Rectangle sourceRectangle) { using (PixelAccessor <TColor> sourcePixels = source.Lock()) using (PenApplicator <TColor> applicator = this.Pen.CreateApplicator(sourcePixels, this.Path.Bounds)) { Rectangle rect = RectangleF.Ceiling(applicator.RequiredRegion); int polyStartY = rect.Y - PaddingFactor; int polyEndY = rect.Bottom + PaddingFactor; int startX = rect.X - PaddingFactor; int endX = rect.Right + PaddingFactor; int minX = Math.Max(sourceRectangle.Left, startX); int maxX = Math.Min(sourceRectangle.Right, endX); int minY = Math.Max(sourceRectangle.Top, polyStartY); int maxY = Math.Min(sourceRectangle.Bottom, polyEndY); // Align start/end positions. minX = Math.Max(0, minX); maxX = Math.Min(source.Width, maxX); minY = Math.Max(0, minY); maxY = Math.Min(source.Height, maxY); // Reset offset if necessary. if (minX > 0) { startX = 0; } if (minY > 0) { polyStartY = 0; } Parallel.For( minY, maxY, this.ParallelOptions, y => { int offsetY = y - polyStartY; for (int x = minX; x < maxX; x++) { // TODO add find intersections code to skip and scan large regions of this. int offsetX = x - startX; PointInfo info = this.Path.GetPointInfo(offsetX, offsetY); ColoredPointInfo <TColor> color = applicator.GetColor(offsetX, offsetY, info); float opacity = this.Opacity(color.DistanceFromElement); if (opacity > Constants.Epsilon) { Vector4 backgroundVector = sourcePixels[offsetX, offsetY].ToVector4(); Vector4 sourceVector = color.Color.ToVector4(); Vector4 finalColor = Vector4BlendTransforms.PremultipliedLerp(backgroundVector, sourceVector, opacity); finalColor.W = backgroundVector.W; TColor packed = default(TColor); packed.PackFromVector4(finalColor); sourcePixels[offsetX, offsetY] = packed; } } }); } }
/// <inheritdoc/> protected override void OnApply(ImageBase <TPixel> source, Rectangle sourceRectangle) { using (PixelAccessor <TPixel> sourcePixels = source.Lock()) using (PenApplicator <TPixel> applicator = this.Pen.CreateApplicator(sourcePixels, this.Path.Bounds, this.Options)) { Rectangle rect = RectangleF.Ceiling(applicator.RequiredRegion); int polyStartY = rect.Y - PaddingFactor; int polyEndY = rect.Bottom + PaddingFactor; int startX = rect.X - PaddingFactor; int endX = rect.Right + PaddingFactor; int minX = Math.Max(sourceRectangle.Left, startX); int maxX = Math.Min(sourceRectangle.Right, endX); int minY = Math.Max(sourceRectangle.Top, polyStartY); int maxY = Math.Min(sourceRectangle.Bottom, polyEndY); // Align start/end positions. minX = Math.Max(0, minX); maxX = Math.Min(source.Width, maxX); minY = Math.Max(0, minY); maxY = Math.Min(source.Height, maxY); // Reset offset if necessary. if (minX > 0) { startX = 0; } if (minY > 0) { polyStartY = 0; } int width = maxX - minX; PixelBlender <TPixel> blender = PixelOperations <TPixel> .Instance.GetPixelBlender(this.Options.BlenderMode); Parallel.For( minY, maxY, this.ParallelOptions, y => { int offsetY = y - polyStartY; using (Buffer <float> amount = new Buffer <float>(width)) using (Buffer <TPixel> colors = new Buffer <TPixel>(width)) { for (int i = 0; i < width; i++) { int x = i + minX; int offsetX = x - startX; PointInfo info = this.Path.GetPointInfo(offsetX, offsetY); ColoredPointInfo <TPixel> color = applicator.GetColor(offsetX, offsetY, info); amount[i] = (this.Opacity(color.DistanceFromElement) * this.Options.BlendPercentage).Clamp(0, 1); colors[i] = color.Color; } BufferSpan <TPixel> destination = sourcePixels.GetRowSpan(offsetY).Slice(minX - startX, width); blender.Blend(destination, destination, colors, amount); } }); } }