//该方法用于在画布上绘制一个图形，两个点用于表示图像的填充区域，image是原始的图片，angle是角度，只有{0,90,180,270}三个角度可选
/***
* public void drawImage(Point leftTop, Point rightBottom, BitmapImage bitmapImage)
* {
* double left = leftTop.X;
* double top = leftTop.Y;
* double width = Math.Abs(leftTop.X - rightBottom.X);
* double height = Math.Abs(leftTop.Y - rightBottom.Y);
*
* double leftWithRatio = left * this.widthRatio;
* double topWithRatio = top * this.heightRatio;
* double widthWithRatio = width * this.widthRatio;
* double heightWithRatio = height * this.heightRatio;
*
* Image shelfImage = new Image();
* //RotateTransform rotateTransform = new RotateTransform(angle);
*
* //DropShadowBitmapEffect bitmapEffect = new DropShadowBitmapEffect();
* //Color myShadowColor = new Color();
* //myShadowColor.ScA = 1;
* //myShadowColor.ScB = 0;
* //myShadowColor.ScG = 0;
* //myShadowColor.ScR = 0;
* //bitmapEffect.Color = myShadowColor;
* //bitmapEffect.Direction = 320;
* //bitmapEffect.ShadowDepth = 10;
* //bitmapEffect.Softness = 0.1;
* //bitmapEffect.Opacity = 0.1;
* shelfImage.Source = bitmapImage;
* shelfImage.Stretch = Stretch.Uniform;
* //shelfImage.BitmapEffect = bitmapEffect;
* //shelfImage.RenderTransform = rotateTransform;
* //shelfImage.Width = widthWithRatio;shelfImage.Height = heightWithRatio;
* shelfImage.Width = heightWithRatio; shelfImage.Height = widthWithRatio;
*
* Canvas.SetTop(shelfImage,topWithRatio);//adjust the postion
* Canvas.SetLeft(shelfImage, leftWithRatio);
* Canvas.SetZIndex(shelfImage, -10);
* this.currentCanvas.Children.Add(shelfImage);
* }
***/
public void drawImage(Point leftTop, Point rightBottom, BitmapImage bitmapImage,
Transform rotateTransform, BitmapEffect bitmapEffect)
{
double left = leftTop.X;
double top = leftTop.Y;
double width = Math.Abs(leftTop.X - rightBottom.X);
double height = Math.Abs(leftTop.Y - rightBottom.Y);
double leftWithRatio = left * this.widthRatio;
double topWithRatio = top * this.heightRatio;
double widthWithRatio = width * this.widthRatio;
double heightWithRatio = height * this.heightRatio;
Image shelfImage = new Image();
shelfImage.Source = bitmapImage;
shelfImage.Stretch = Stretch.Fill;
shelfImage.RenderTransform = rotateTransform;
shelfImage.BitmapEffect = bitmapEffect;
shelfImage.Width = widthWithRatio - 3;
shelfImage.Height = heightWithRatio;
//shelfImage.Width = heightWithRatio; shelfImage.Height = widthWithRatio;
Canvas.SetTop(shelfImage, topWithRatio);//adjust the postion
Canvas.SetLeft(shelfImage, leftWithRatio);
Canvas.SetZIndex(shelfImage, -10);
this.currentCanvas.Children.Add(shelfImage);
}
public VerticalIndicator()
{
_effect = new OuterGlowBitmapEffect {
GlowColor = Colors.White, GlowSize = 20, Opacity = 1
};
_effect.Freeze();
}
/// <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 BitmapEffect ToBitmapEffect()
{
if (Document.Options.IgnoreEffects)
{
return(null);
}
BitmapEffectGroup bitmap_effect_group = new BitmapEffectGroup();
foreach (SvgFilterEffectBaseElement filter_effect in FilterEffects)
{
BitmapEffect bitmap_effect = filter_effect.ToBitmapEffect();
if (bitmap_effect != null)
{
bitmap_effect_group.Children.Add(bitmap_effect);
}
}
if (bitmap_effect_group.Children.Count == 0)
{
return(null);
}
return(bitmap_effect_group);
}
public BlockTimeDisplayLayerDraw()
{
_effect = new OuterGlowBitmapEffect {
GlowColor = Colors.White, GlowSize = 20, Opacity = 1
};
_effect.Freeze();
}
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.
}
public override void PushEffect(
BitmapEffect effect,
BitmapEffectInput effectInput)
{
if (!IsPushNoOp())
{
// This API has been deprecated, so any BitmapEffect is ignored.
PushPointStack(_point);
}
}
//==========================================================================
public virtual Drawing Draw()
{
Drawing drawing = GetBaseDrawing();
if (drawing == null)
{
return(null);
}
BitmapEffect bitmap_effect = null;
if (Filter != null)
{
if (Document.Elements.ContainsKey(Filter))
{
SvgFilterElement filter_element = Document.Elements[Filter] as SvgFilterElement;
if (filter_element != null)
{
bitmap_effect = filter_element.ToBitmapEffect();
}
}
}
Brush opacity_mask = null;
if (Mask != null)
{
SvgMaskElement mask_element = Document.Elements[Mask] as SvgMaskElement;
if (mask_element != null)
{
opacity_mask = mask_element.GetOpacityMask();
if (opacity_mask != null)
{
if (Transform != null)
{
opacity_mask.Transform = Transform.ToTransform();
}
}
}
}
if ((opacity_mask == null) && (bitmap_effect == null))
{
return(drawing);
}
DrawingGroup drawing_group = new DrawingGroup();
drawing_group.BitmapEffect = bitmap_effect;
drawing_group.OpacityMask = opacity_mask;
drawing_group.Children.Add(drawing);
return(drawing_group);
}
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();
}
unsafe protected override SafeHandle CreateUnmanagedEffect()
{
const uint CLSCTX_INPROC_SERVER = 1;
Guid IID_IUnknown = new Guid("00000000-0000-0000-C000-000000000046");
Guid guidEffectCLSID = new Guid("84CF07CC-34C4-460f-B435-3184F5F2FF2A");
SafeHandle wrapper = BitmapEffect.CreateBitmapEffectOuter();
COMSafeHandle unmanagedEffect;
uint hresult = Ole32Methods.CoCreateInstance(
ref guidEffectCLSID,
wrapper.DangerousGetHandle(),
CLSCTX_INPROC_SERVER,
ref IID_IUnknown,
out unmanagedEffect);
InitializeBitmapEffect(wrapper, unmanagedEffect);
if (0 == hresult)
{
return(wrapper);
}
throw new Exception("Cannot instantiate effect. HRESULT = " + hresult.ToString());
}
public abstract void PushEffect(
BitmapEffect effect,
BitmapEffectInput effectInput);
protected override void UpdateUnmanagedPropertyState(SafeHandle unmanagedEffect)
{
BitmapEffect.SetValue(unmanagedEffect, "Red", this.Red);
BitmapEffect.SetValue(unmanagedEffect, "Green", this.Green);
BitmapEffect.SetValue(unmanagedEffect, "Blue", this.Blue);
}
/// <summary>
/// Apply a bitmap effect to this RenderBuffer
/// </summary>
public void ApplyEffect(BitmapEffect effect)
{
ApplyEffect(effect, null);
}
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);
}