/// <summary>
/// Apply a bitmap effect to this RenderBuffer within the area defined by the effect input.
/// </summary>
public void ApplyEffect(BitmapEffect effect, BitmapEffectInput input)
{
if (effect == null)
{
return;
}
//
Rect bounds = ComputeAreaToApplyEffect(input);
if (bounds.IsEmpty)
{
// NOTE: Don't confuse 'bounds' with BitmapEffectInput.AreaToApplyEffect!
// An empty area in the Input means to use the entire RenderTarget, and bounds
// is the size of the RenderTarget we want to apply the effect to.
// At this stage, 'Empty' means that there is nothing to apply an effect to.
return;
}
if (effect is DropShadowBitmapEffect)
{
ApplyDropShadow(effect as DropShadowBitmapEffect, bounds);
}
else
{
throw new NotImplementedException("Haven't implemented the " + effect.GetType().Name + " effect yet");
}
}
public override void PushEffect(
BitmapEffect effect,
BitmapEffectInput effectInput)
{
_drawingContext.PushEffect(
effect,
effectInput
);
}
public override void PushEffect(
BitmapEffect effect,
BitmapEffectInput effectInput)
{
// Ensure the type stack
PushTypeStack(PushType.BitmapEffect);
// This API has been deprecated, so any BitmapEffect is ignored.
}
/// <summary>
/// This summary has not been prepared yet. NOSUMMARY - pantal07
/// </summary>
public static BitmapEffectInput Absolute(Rect absoluteArea)
{
BitmapEffectInput input = new BitmapEffectInput();
input.AreaToApplyEffect = absoluteArea;
input.AreaToApplyEffectUnits = BrushMappingMode.Absolute;
return(input);
}
/// <summary>
/// This summary has not been prepared yet. NOSUMMARY - pantal07
/// </summary>
public static BitmapEffectInput Relative(Rect relativeArea)
{
BitmapEffectInput input = new BitmapEffectInput();
input.AreaToApplyEffect = relativeArea;
input.AreaToApplyEffectUnits = BrushMappingMode.RelativeToBoundingBox;
return(input);
}
public override void PushEffect(
BitmapEffect effect,
BitmapEffectInput effectInput)
{
if (!IsPushNoOp())
{
// This API has been deprecated, so any BitmapEffect is ignored.
PushPointStack(_point);
}
}
private static DrawingGroup WalkVisual(Visual visual)
{
DrawingGroup vd = VisualTreeHelper.GetDrawing(visual);
BitmapEffect be = VisualTreeHelper.GetBitmapEffect(visual);
BitmapEffectInput bei = VisualTreeHelper.GetBitmapEffectInput(visual);
Geometry cg = VisualTreeHelper.GetClip(visual);
double op = VisualTreeHelper.GetOpacity(visual);
Brush om = VisualTreeHelper.GetOpacityMask(visual);
GuidelineSet? gs = GetGuidelines(visual);
Transform? tx = GetTransform(visual);
DrawingGroup?dg = null;
if (be is null && cg is null && om is null && gs is null && tx is null && IsZero(op - 1))
{
dg = vd ?? new DrawingGroup();
}
/// <summary>
/// Compute the DPI-correct rectangular area that the BitmapEffectInput describes
/// </summary>
private Rect ComputeAreaToApplyEffect(BitmapEffectInput input)
{
if (input == null || input.AreaToApplyEffect.IsEmpty)
{
// Empty area is the same as a null input (use entire RenderTarget).
// width and height are already in absolute DPI (no conversion necessary)
return(new Rect(0, 0, width, height));
}
else
{
// 'renderedBounds' is already in absolute DPI (no conversion necessary)
Rect renderedBounds = RenderedBounds;
if (renderedBounds == Rect.Empty)
{
// No effect can be applied because no pixels are rendered.
return(Rect.Empty);
}
Rect area;
if (input.AreaToApplyEffectUnits == BrushMappingMode.RelativeToBoundingBox)
{
// The DPI conversion happens implicitly because renderedBounds is already adjusted.
area = MathEx.ScaleRect(input.AreaToApplyEffect, renderedBounds);
}
else
{
area = MathEx.ConvertToAbsolutePixels(input.AreaToApplyEffect);
// Absolute is defined as relative to the boundingBox so we need to transform (offset)
// its location by the bounding box's location (do not scale by Width/Height)
area.X += renderedBounds.X;
area.Y += renderedBounds.Y;
}
area = Rect.Intersect(area, renderedBounds);
return(MathEx.InflateToIntegerBounds(area));
}
}
public abstract void PushEffect(
BitmapEffect effect,
BitmapEffectInput effectInput);
public override void PushEffect(
BitmapEffect effect,
BitmapEffectInput effectInput)
{
Debug.Assert(false);
}
private static Drawing CreateDrawing(Visual visual, bool includeTransform)
{
DrawingGroup drawingGroup = new DrawingGroup();
System.Windows.Media.Geometry clip = VisualTreeHelper.GetClip(visual);
if (clip != null)
{
drawingGroup.ClipGeometry = clip;
}
if (includeTransform)
{
Transform transform = VisualTreeHelper.GetTransform(visual);
Vector offset = VisualTreeHelper.GetOffset(visual);
Matrix matrix = transform == null ? Matrix.Identity : transform.Value;
matrix.Translate(offset.X, offset.Y);
if (!matrix.IsIdentity)
{
drawingGroup.Transform = (Transform) new MatrixTransform(matrix);
}
}
double opacity = VisualTreeHelper.GetOpacity(visual);
if (opacity != 1.0)
{
drawingGroup.Opacity = opacity;
}
Brush opacityMask = VisualTreeHelper.GetOpacityMask(visual);
if (opacityMask != null)
{
drawingGroup.OpacityMask = opacityMask;
}
BitmapEffect bitmapEffect = VisualTreeHelper.GetBitmapEffect(visual);
if (bitmapEffect != null)
{
drawingGroup.BitmapEffect = bitmapEffect;
}
BitmapEffectInput bitmapEffectInput = VisualTreeHelper.GetBitmapEffectInput(visual);
if (bitmapEffectInput != null && (!bitmapEffectInput.AreaToApplyEffect.IsEmpty || bitmapEffectInput.Input != BitmapEffectInput.ContextInputSource))
{
drawingGroup.BitmapEffectInput = bitmapEffectInput;
}
Drawing drawing1;
if (MakeDrawingBrushCommand.IsMediaElementInstance(visual))
{
Rect bounds = VisualTreeHelper.GetDrawing(visual).Bounds;
drawing1 = (Drawing) new VideoDrawing()
{
Rect = bounds
};
}
else
{
drawing1 = (Drawing)VisualTreeHelper.GetDrawing(visual);
}
if (drawing1 != null)
{
drawingGroup.Children.Add(drawing1);
}
for (int childIndex = 0; childIndex < VisualTreeHelper.GetChildrenCount((DependencyObject)visual); ++childIndex)
{
Visual visual1 = VisualTreeHelper.GetChild((DependencyObject)visual, childIndex) as Visual;
if (visual1 != null)
{
Drawing drawing2 = MakeDrawingBrushCommand.CreateDrawing(visual1, true);
if (drawing2 != null)
{
drawingGroup.Children.Add(drawing2);
}
}
}
if (drawingGroup.Children.Count == 0)
{
return((Drawing)null);
}
if (drawingGroup.Children.Count == 1 && drawingGroup.ClipGeometry == null && (drawingGroup.Transform == null || drawingGroup.Transform.Value.IsIdentity) && (drawingGroup.Opacity == 1.0 && drawingGroup.OpacityMask == null && drawingGroup.BitmapEffect == null))
{
return(drawingGroup.Children[0]);
}
return((Drawing)drawingGroup);
}
