SKOverdrawCanvas Class
Definition
Important
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A canvas that captures all drawing commands, and rather than draw the actual content, it increments the alpha channel of each pixel every time it would have been touched by a draw call.
public class SKOverdrawCanvas : SkiaSharp.SKNWayCanvas- Inheritance
Remarks
This is useful for detecting overdraw.
Constructors
| SKOverdrawCanvas(SKCanvas) |
Creates a new SKOverdrawCanvas that wraps the specified SKCanvas. |
Properties
| DeviceClipBounds |
Gets the bounds of the current clip (in device coordinates). (Inherited from SKCanvas) |
| Handle |
Gets or sets the handle to the underlying native object. (Inherited from SKObject) |
| IgnorePublicDispose |
Gets or sets a value indicating whether the call the public Dispose() should be no-op. (Inherited from SKNativeObject) |
| IsClipEmpty | (Inherited from SKCanvas) |
| IsClipRect | (Inherited from SKCanvas) |
| IsDisposed |
Gets or sets a value indicating whether the object has already been disposed. (Inherited from SKNativeObject) |
| LocalClipBounds |
Gets the bounds of the current clip (in local coordinates). (Inherited from SKCanvas) |
| OwnsHandle |
Gets a value indicating whether this object should destroy the underlying native object. (Inherited from SKObject) |
| SaveCount |
Gets the number of matrix/clip states on the canvas' private stack. (Inherited from SKCanvas) |
| TotalMatrix |
Gets the current matrix on the canvas. (Inherited from SKCanvas) |
Methods
| AddCanvas(SKCanvas) | (Inherited from SKNWayCanvas) |
| Clear() |
Replaces all the pixels in the canvas' current clip with the Empty color. (Inherited from SKCanvas) |
| Clear(SKColor) |
Replaces all the pixels in the canvas' current clip with the specified color. (Inherited from SKCanvas) |
| Clear(SKColorF) | (Inherited from SKCanvas) |
| ClipPath(SKPath, SKClipOperation, Boolean) |
Modify the current clip with the specified path. (Inherited from SKCanvas) |
| ClipRect(SKRect, SKClipOperation, Boolean) |
Modify the current clip with the specified rectangle. (Inherited from SKCanvas) |
| ClipRegion(SKRegion, SKClipOperation) |
Modify the current clip with the specified region. (Inherited from SKCanvas) |
| ClipRoundRect(SKRoundRect, SKClipOperation, Boolean) |
Modify the current clip with the specified rounded rectangle. (Inherited from SKCanvas) |
| Concat(SKMatrix) |
Pre-concatenates the provided transformation matrix with the current transformation matrix. (Inherited from SKCanvas) |
| Discard() |
Makes the canvas contents undefined. (Inherited from SKCanvas) |
| Dispose() |
Releases all resources used by this SKNativeObject. (Inherited from SKNativeObject) |
| Dispose(Boolean) |
Releases the unmanaged resources used by the SKCanvas and optionally releases the managed resources. (Inherited from SKCanvas) |
| DisposeInternal() |
Triggers a dispose, ignoring the value of IgnorePublicDispose. (Inherited from SKNativeObject) |
| DisposeManaged() |
Implemented by derived SKObject types to destroy any managed objects. (Inherited from SKObject) |
| DisposeNative() |
Implemented by derived SKObject types to destroy any native objects. (Inherited from SKCanvas) |
| DisposeUnownedManaged() | (Inherited from SKObject) |
| DrawAnnotation(SKRect, String, SKData) |
Send an key/value pair "annotation" to the canvas. (Inherited from SKCanvas) |
| DrawArc(SKRect, Single, Single, Boolean, SKPaint) | (Inherited from SKCanvas) |
| DrawAtlas(SKImage, SKRect[], SKRotationScaleMatrix[], SKColor[], SKBlendMode, SKPaint) | (Inherited from SKCanvas) |
| DrawAtlas(SKImage, SKRect[], SKRotationScaleMatrix[], SKColor[], SKBlendMode, SKRect, SKPaint) | (Inherited from SKCanvas) |
| DrawAtlas(SKImage, SKRect[], SKRotationScaleMatrix[], SKPaint) | (Inherited from SKCanvas) |
| DrawBitmap(SKBitmap, Single, Single, SKPaint) |
Draws a bitmap on the canvas. (Inherited from SKCanvas) |
| DrawBitmap(SKBitmap, SKPoint, SKPaint) |
Draws a bitmap on the canvas. (Inherited from SKCanvas) |
| DrawBitmap(SKBitmap, SKRect, SKPaint) |
Draws a bitmap on the canvas. (Inherited from SKCanvas) |
| DrawBitmap(SKBitmap, SKRect, SKRect, SKPaint) |
Draws a bitmap on the canvas. (Inherited from SKCanvas) |
| DrawBitmapLattice(SKBitmap, Int32[], Int32[], SKRect, SKPaint) |
Draws the bitmap, stretched or shrunk differentially to fit into the destination rectangle. (Inherited from SKCanvas) |
| DrawBitmapLattice(SKBitmap, SKLattice, SKRect, SKPaint) |
Draws the bitmap, stretched or shrunk differentially to fit into the destination rectangle. (Inherited from SKCanvas) |
| DrawBitmapNinePatch(SKBitmap, SKRectI, SKRect, SKPaint) |
Draws the bitmap, stretched or shrunk differentially to fit into the destination rectangle. (Inherited from SKCanvas) |
| DrawCircle(Single, Single, Single, SKPaint) |
Draws a circle on the canvas. (Inherited from SKCanvas) |
| DrawCircle(SKPoint, Single, SKPaint) |
Draws a circle on the canvas. (Inherited from SKCanvas) |
| DrawColor(SKColor, SKBlendMode) |
Fills the current clipping area with the specified color using the specified color and blend mode. (Inherited from SKCanvas) |
| DrawColor(SKColorF, SKBlendMode) | (Inherited from SKCanvas) |
| DrawDrawable(SKDrawable, Single, Single) |
Draws a drawable on the canvas. (Inherited from SKCanvas) |
| DrawDrawable(SKDrawable, SKMatrix) |
Draws a drawable on the canvas. (Inherited from SKCanvas) |
| DrawDrawable(SKDrawable, SKPoint) |
Draws a drawable on the canvas. (Inherited from SKCanvas) |
| DrawImage(SKImage, Single, Single, SKPaint) |
Draws an image on the canvas. (Inherited from SKCanvas) |
| DrawImage(SKImage, SKPoint, SKPaint) |
Draws an image on the canvas. (Inherited from SKCanvas) |
| DrawImage(SKImage, SKRect, SKPaint) |
Draws an image on the canvas. (Inherited from SKCanvas) |
| DrawImage(SKImage, SKRect, SKRect, SKPaint) |
Draws an image on the canvas. (Inherited from SKCanvas) |
| DrawImageLattice(SKImage, Int32[], Int32[], SKRect, SKPaint) |
Draws the image, stretched or shrunk differentially to fit into the destination rectangle. (Inherited from SKCanvas) |
| DrawImageLattice(SKImage, SKLattice, SKRect, SKPaint) |
Draws the image, stretched or shrunk differentially to fit into the destination rectangle. (Inherited from SKCanvas) |
| DrawImageNinePatch(SKImage, SKRectI, SKRect, SKPaint) |
Draws the image, stretched or shrunk differentially to fit into the destination rectangle. (Inherited from SKCanvas) |
| DrawLine(Single, Single, Single, Single, SKPaint) |
Draws a line on the canvas. (Inherited from SKCanvas) |
| DrawLine(SKPoint, SKPoint, SKPaint) |
Draws a line on the canvas. (Inherited from SKCanvas) |
| DrawLinkDestinationAnnotation(SKRect, SKData) |
Annotates the canvas by making the specified rectangle link to a named destination (see DrawNamedDestinationAnnotation(SKPoint, SKData)). (Inherited from SKCanvas) |
| DrawLinkDestinationAnnotation(SKRect, String) |
Annotates the canvas by making the specified rectangle link to a named destination (see DrawNamedDestinationAnnotation(SKPoint, String)). (Inherited from SKCanvas) |
| DrawNamedDestinationAnnotation(SKPoint, SKData) |
Annotates the canvas by associating a name with the specified point (see DrawLinkDestinationAnnotation(SKRect, SKData)). (Inherited from SKCanvas) |
| DrawNamedDestinationAnnotation(SKPoint, String) |
Annotates the canvas by associating a name with the specified point (see DrawLinkDestinationAnnotation(SKRect, String)). (Inherited from SKCanvas) |
| DrawOval(Single, Single, Single, Single, SKPaint) |
Draws an oval on the canvas. (Inherited from SKCanvas) |
| DrawOval(SKPoint, SKSize, SKPaint) |
Draws an oval on the canvas. (Inherited from SKCanvas) |
| DrawOval(SKRect, SKPaint) |
Draws an oval on the canvas. (Inherited from SKCanvas) |
| DrawPaint(SKPaint) |
Fills the current clipping path with the specified paint. (Inherited from SKCanvas) |
| DrawPatch(SKPoint[], SKColor[], SKPoint[], SKBlendMode, SKPaint) | (Inherited from SKCanvas) |
| DrawPatch(SKPoint[], SKColor[], SKPoint[], SKPaint) | (Inherited from SKCanvas) |
| DrawPath(SKPath, SKPaint) |
Draws a path in the canvas. (Inherited from SKCanvas) |
| DrawPicture(SKPicture, Single, Single, SKPaint) |
Draws a picture on the canvas. (Inherited from SKCanvas) |
| DrawPicture(SKPicture, SKMatrix, SKPaint) |
Draws a picture on the canvas. (Inherited from SKCanvas) |
| DrawPicture(SKPicture, SKPaint) |
Draws a picture on the canvas. (Inherited from SKCanvas) |
| DrawPicture(SKPicture, SKPoint, SKPaint) |
Draws a picture on the canvas. (Inherited from SKCanvas) |
| DrawPoint(Single, Single, SKColor) |
Draws a point in the canvas with the specified color. (Inherited from SKCanvas) |
| DrawPoint(Single, Single, SKPaint) |
Draws a point in the canvas with the specified color. (Inherited from SKCanvas) |
| DrawPoint(SKPoint, SKColor) |
Draws a point in the canvas with the specified color. (Inherited from SKCanvas) |
| DrawPoint(SKPoint, SKPaint) |
Draws a point in the canvas with the specified color. (Inherited from SKCanvas) |
| DrawPoints(SKPointMode, SKPoint[], SKPaint) |
Draws an array of points, lines or a polygon in the canvas, one at a time. (Inherited from SKCanvas) |
| DrawPositionedText(Byte[], SKPoint[], SKPaint) |
Obsolete.
Draws glyphs of the text at specified locations on the canvas. (Inherited from SKCanvas) |
| DrawPositionedText(IntPtr, Int32, SKPoint[], SKPaint) |
Obsolete.
Draws text from a UTF-8 buffer at specified locations on the canvas. (Inherited from SKCanvas) |
| DrawPositionedText(String, SKPoint[], SKPaint) |
Obsolete.
Draws glyphs of the text at specified locations on the canvas. (Inherited from SKCanvas) |
| DrawRect(Single, Single, Single, Single, SKPaint) |
Draws a rectangle in the canvas. (Inherited from SKCanvas) |
| DrawRect(SKRect, SKPaint) |
Draws a rectangle in the canvas. (Inherited from SKCanvas) |
| DrawRegion(SKRegion, SKPaint) |
Draws the outline of the specified region using the specified paint. (Inherited from SKCanvas) |
| DrawRoundRect(Single, Single, Single, Single, Single, Single, SKPaint) |
Draws a rounded rectangle in the canvas. (Inherited from SKCanvas) |
| DrawRoundRect(SKRect, Single, Single, SKPaint) |
Draws a rounded rectangle in the canvas. (Inherited from SKCanvas) |
| DrawRoundRect(SKRect, SKSize, SKPaint) |
Draws a rounded rectangle in the canvas. (Inherited from SKCanvas) |
| DrawRoundRect(SKRoundRect, SKPaint) |
Draws a rounded rectangle in the canvas. (Inherited from SKCanvas) |
| DrawRoundRectDifference(SKRoundRect, SKRoundRect, SKPaint) | (Inherited from SKCanvas) |
| DrawSurface(SKSurface, Single, Single, SKPaint) |
Draws a surface on the canvas. (Inherited from SKCanvas) |
| DrawSurface(SKSurface, SKPoint, SKPaint) |
Draws a surface on the canvas. (Inherited from SKCanvas) |
| DrawText(Byte[], Single, Single, SKPaint) |
Obsolete.
Draws text on the canvas at the specified coordinates. (Inherited from SKCanvas) |
| DrawText(Byte[], SKPoint, SKPaint) |
Obsolete.
Draws text on the canvas at the specified coordinates. (Inherited from SKCanvas) |
| DrawText(IntPtr, Int32, Single, Single, SKPaint) |
Obsolete.
Draws text encoded in a UTF-8 buffer on the canvas at the specified coordinates. (Inherited from SKCanvas) |
| DrawText(IntPtr, Int32, SKPoint, SKPaint) |
Obsolete.
Draws text encoded in a UTF-8 buffer on the canvas at the specified coordinates. (Inherited from SKCanvas) |
| DrawText(SKTextBlob, Single, Single, SKPaint) |
Draws a text blob on the canvas at the specified coordinates. (Inherited from SKCanvas) |
| DrawText(String, Single, Single, SKFont, SKPaint) | (Inherited from SKCanvas) |
| DrawText(String, Single, Single, SKPaint) |
Draws text on the canvas at the specified coordinates. (Inherited from SKCanvas) |
| DrawText(String, SKPoint, SKPaint) |
Draws text on the canvas at the specified coordinates. (Inherited from SKCanvas) |
| DrawTextOnPath(Byte[], SKPath, Single, Single, SKPaint) |
Obsolete.
Draws text on the canvas following a path. (Inherited from SKCanvas) |
| DrawTextOnPath(Byte[], SKPath, SKPoint, SKPaint) |
Obsolete.
Draws text on the canvas following a path. (Inherited from SKCanvas) |
| DrawTextOnPath(IntPtr, Int32, SKPath, Single, Single, SKPaint) |
Obsolete.
Draws text encoded in a UTF-8 buffer on the canvas following a path. (Inherited from SKCanvas) |
| DrawTextOnPath(IntPtr, Int32, SKPath, SKPoint, SKPaint) |
Obsolete.
Draws text on the canvas following a path. (Inherited from SKCanvas) |
| DrawTextOnPath(String, SKPath, Single, Single, SKPaint) |
Draws text on the canvas following a path. (Inherited from SKCanvas) |
| DrawTextOnPath(String, SKPath, SKPoint, Boolean, SKFont, SKPaint) | (Inherited from SKCanvas) |
| DrawTextOnPath(String, SKPath, SKPoint, Boolean, SKPaint) | (Inherited from SKCanvas) |
| DrawTextOnPath(String, SKPath, SKPoint, SKPaint) |
Draws text on the canvas following a path. (Inherited from SKCanvas) |
| DrawUrlAnnotation(SKRect, SKData) |
Annotates the canvas by associating the specified URL with the specified rectangle (in local coordinates). (Inherited from SKCanvas) |
| DrawUrlAnnotation(SKRect, String) |
Annotates the canvas by associating the specified URL with the specified rectangle (in local coordinates). (Inherited from SKCanvas) |
| DrawVertices(SKVertexMode, SKPoint[], SKColor[], SKPaint) |
Draws an array of vertices, interpreted as triangles (based on mode). (Inherited from SKCanvas) |
| DrawVertices(SKVertexMode, SKPoint[], SKPoint[], SKColor[], SKBlendMode, UInt16[], SKPaint) |
Draws an array of vertices, interpreted as triangles (based on mode). (Inherited from SKCanvas) |
| DrawVertices(SKVertexMode, SKPoint[], SKPoint[], SKColor[], SKPaint) |
Draws an array of vertices, interpreted as triangles (based on mode). (Inherited from SKCanvas) |
| DrawVertices(SKVertexMode, SKPoint[], SKPoint[], SKColor[], UInt16[], SKPaint) |
Draws an array of vertices, interpreted as triangles (based on mode). (Inherited from SKCanvas) |
| DrawVertices(SKVertices, SKBlendMode, SKPaint) |
Draws a set of vertices. (Inherited from SKCanvas) |
| Flush() |
Triggers the immediate execution of all pending draw operations. (Inherited from SKCanvas) |
| GetDeviceClipBounds(SKRectI) |
Returns the bounds of the current clip (in device coordinates). (Inherited from SKCanvas) |
| GetLocalClipBounds(SKRect) |
Returns the bounds of the current clip (in local coordinates). (Inherited from SKCanvas) |
| QuickReject(SKPath) |
Checks to see if the specified path, after being transformed by the current matrix, would lie completely outside of the current clip. (Inherited from SKCanvas) |
| QuickReject(SKRect) |
Checks to see if the specified rectangle, after being transformed by the current matrix, would lie completely outside of the current clip. (Inherited from SKCanvas) |
| RemoveAll() |
Remove all canvases. (Inherited from SKNWayCanvas) |
| RemoveCanvas(SKCanvas) | (Inherited from SKNWayCanvas) |
| ResetMatrix() |
Sets the current matrix to identity. (Inherited from SKCanvas) |
| Restore() |
Restore the canvas state. (Inherited from SKCanvas) |
| RestoreToCount(Int32) |
Efficiently restores the state to a specific level. (Inherited from SKCanvas) |
| RotateDegrees(Single, Single, Single) |
Pre-concatenates the current matrix with the specified rotation, around the specified point. (Inherited from SKCanvas) |
| RotateDegrees(Single) |
Pre-concatenates the current matrix with the specified rotation. (Inherited from SKCanvas) |
| RotateRadians(Single, Single, Single) |
Pre-concatenates the current matrix with the specified rotation, around the specified point. (Inherited from SKCanvas) |
| RotateRadians(Single) |
Pre-concatenates the current matrix with the specified rotation. (Inherited from SKCanvas) |
| Save() |
Saves the canvas state. (Inherited from SKCanvas) |
| SaveLayer() | (Inherited from SKCanvas) |
| SaveLayer(SKPaint) |
Saves the canvas state and allocates an offscreen bitmap. (Inherited from SKCanvas) |
| SaveLayer(SKRect, SKPaint) |
Saves the canvas state and allocates an offscreen bitmap. (Inherited from SKCanvas) |
| Scale(Single, Single, Single, Single) |
Pre-concatenates the current matrix with the specified scale, at the specific offset. (Inherited from SKCanvas) |
| Scale(Single, Single) |
Pre-concatenates the current matrix with the specified scale. (Inherited from SKCanvas) |
| Scale(Single) |
Pre-concatenates the current matrix with the specified scale. (Inherited from SKCanvas) |
| Scale(SKPoint) |
Pre-concatenates the current matrix with the specified scale. (Inherited from SKCanvas) |
| SetMatrix(SKMatrix) |
Replaces the current matrix with a copy of the specified matrix. (Inherited from SKCanvas) |
| Skew(Single, Single) |
Pre-concatenates the current matrix with the specified skew. (Inherited from SKCanvas) |
| Skew(SKPoint) |
Pre-concatenates the current matrix with the specified skew. (Inherited from SKCanvas) |
| Translate(Single, Single) |
Pre-concatenates the current matrix with the specified translation. (Inherited from SKCanvas) |
| Translate(SKPoint) |
Pre-concatenates the current matrix with the specified translation. (Inherited from SKCanvas) |
