protected override void RenderNewStrokeSegment()
{
ProcessorResult <List <float> > result;
lock (mInkBuilderLock)
{
if (mInkBuilder.HasNewPoints)
{
result = mInkBuilder.GetPath();
}
else
{
return;
}
}
uint channelMask = (uint)mInkBuilder.SplineInterpolator.InterpolatedSplineLayout.ChannelMask;
mAddedInterpolatedSpline.Assign(result.Addition, channelMask);
mPredictedInterpolatedSpline.Assign(result.Prediction, channelMask);
ParticleBrush brush = mInkBuilder.Brush;
// Draw the added stroke
mRenderingContext.SetTarget(mCurrentStrokeLayer);
mDrawStrokeResult = mRenderingContext.DrawParticleStroke(mAddedInterpolatedSpline, mStrokeConstants, brush, Ink.Rendering.BlendMode.SourceOver, mDrawStrokeResult.RandomGeneratorSeed);
// Measure the predicted stroke
Rect predictedStrokeRect = mRenderingContext.MeasureParticleStrokeBounds(mPredictedInterpolatedSpline, mStrokeConstants, brush.Scattering);
// Calculate the update rect for this frame
Rect updateRect = mDirtyRectManager.GetUpdateRect(mDrawStrokeResult.DirtyRect, predictedStrokeRect);
// Draw the predicted stroke
mRenderingContext.SetTarget(mPrelimPathLayer);
mRenderingContext.DrawLayerAtPoint(mCurrentStrokeLayer, updateRect, new Point(updateRect.X, updateRect.Y), Ink.Rendering.BlendMode.Copy);
mRenderingContext.DrawParticleStroke(mPredictedInterpolatedSpline, mStrokeConstants, brush, Ink.Rendering.BlendMode.SourceOver, mDrawStrokeResult.RandomGeneratorSeed);
// Reconstruct the scene under the current stroke (only within the updated rect)
mRenderingContext.SetTarget(mSceneLayer, updateRect);
mRenderingContext.ClearColor(BackgroundColor);
mRenderingContext.DrawLayerAtPoint(mAllStrokesLayer, updateRect, new Point(updateRect.X, updateRect.Y), Ink.Rendering.BlendMode.SourceOver);
// Blend the current stroke on top (only within the updated rect)
mRenderingContext.DrawLayerAtPoint(mPrelimPathLayer, updateRect, new Point(updateRect.X, updateRect.Y), Ink.Rendering.BlendMode.SourceOver);
}
/// <summary>
/// Handles brush-specific parts of drawing a new stroke segment
/// </summary>
/// <param name="updateRect">returns bounding rectangle of area requiring update</param>
public override void DoRenderNewStrokeSegment(out Rect updateRect)
{
var result = mActiveTool.Path;
uint channelMask = (uint)RasterInkBuilder.SplineInterpolator.InterpolatedSplineLayout.ChannelMask;
mAddedInterpolatedSpline.Assign(result.Addition, channelMask);
mPredictedInterpolatedSpline.Assign(result.Prediction, channelMask);
// Draw the added stroke
mRenderer.RenderingContext.SetTarget(mRenderer.CurrentStrokeLayer);
mDrawStrokeResult = mRenderer.RenderingContext.DrawParticleStroke(mAddedInterpolatedSpline, mStrokeConstants, mActiveTool.Brush, Ink.Rendering.BlendMode.SourceOver, mDrawStrokeResult.RandomGeneratorSeed);
// Measure the predicted stroke
Rect predictedStrokeRect = mRenderer.RenderingContext.MeasureParticleStrokeBounds(mPredictedInterpolatedSpline, mStrokeConstants, mActiveTool.Brush.Scattering);
// Calculate the update rect for this frame
updateRect = mRenderer.DirtyRectManager.GetUpdateRect(mDrawStrokeResult.DirtyRect, predictedStrokeRect);
// Draw the predicted stroke
mRenderer.RenderingContext.SetTarget(mRenderer.PrelimPathLayer);
mRenderer.RenderingContext.DrawLayerAtPoint(mRenderer.CurrentStrokeLayer, updateRect, new Point(updateRect.X, updateRect.Y), Ink.Rendering.BlendMode.Copy);
mRenderer.RenderingContext.DrawParticleStroke(mPredictedInterpolatedSpline, mStrokeConstants, mActiveTool.Brush, Ink.Rendering.BlendMode.SourceOver, mDrawStrokeResult.RandomGeneratorSeed);
}
