Table of Contents

Class StretchBlock

Namespace
VisioForge.Core.MediaBlocks.VideoProcessing
Assembly
VisioForge.Core.dll

Stretch distortion effect block that creates circular radial stretching around a center point. This block applies a radial stretch transformation that pulls or pushes pixels in a circular pattern from a center point, creating effects similar to looking through a magnifying glass or funhouse mirror. Features adjustable intensity for both inward and outward stretching, center point positioning, and radius control. Essential for creative distortions, lens simulation effects, artistic transformations, and visual effects requiring radial warping. Implements the VisioForge.Core.MediaBlocks.MediaBlock. Implements the VisioForge.Core.MediaBlocks.IMediaBlockInternals. Implements the IDisposable.

public class StretchBlock : MediaBlock, IMediaBlock, IDisposable, IMediaBlockInternals

Inheritance

Implements

Inherited Members

Extension Methods

Constructors

StretchBlock(double)

Initializes a new instance of the VisioForge.Core.MediaBlocks.VideoProcessing.StretchBlock class with the specified stretch intensity.

public StretchBlock(double intensity = 0.5)

Parameters

intensity double

The stretch intensity (-1.0 to 1.0, default: 0.5).

Properties

Input

Gets the input.

public override MediaBlockPad Input { get; }

Property Value

MediaBlockPad

Inputs

Gets the inputs.

public override MediaBlockPad[] Inputs { get; }

Property Value

MediaBlockPad[]

Intensity

Gets or sets the stretch intensity value. Positive values create outward stretching (magnification), negative values create inward stretching (compression). Range typically from -1.0 to 1.0, with 0.0 being no effect.

public double Intensity { get; set; }

Property Value

double

Output

Gets the output.

public override MediaBlockPad Output { get; }

Property Value

MediaBlockPad

Outputs

Gets the outputs.

public override MediaBlockPad[] Outputs { get; }

Property Value

MediaBlockPad[]

Type

Gets the type.

public override MediaBlockType Type { get; }

Property Value

MediaBlockType

Methods

Build()

Constructs and initializes the stretch filter and its associated GStreamer elements. This method creates the filter with the specified intensity, establishes input and output pads, and prepares the block for applying circular radial stretching effects.

public override bool Build()

Returns

bool

true if the filter was successfully built and configured; false if initialization failed.

CleanUp()

Releases all resources and performs cleanup operations for this stretch effect block. This method disposes of the GStreamer elements and resets the build state.

public void CleanUp()

Dispose(bool)

Releases unmanaged and - optionally - managed resources.

protected override void Dispose(bool disposing)

Parameters

disposing bool

true to release both managed and unmanaged resources; false to release only unmanaged resources.

GetCore()

Gets the core BaseElement wrapper that provides additional functionality around the GStreamer stretch filter element.

public BaseElement GetCore()

Returns

BaseElement

The BaseElement wrapper instance that encapsulates the GStreamer stretch filter.

GetElement()

Gets the underlying GStreamer element that performs the stretch distortion.

public Element GetElement()

Returns

Element

The GStreamer Element instance representing the stretch filter.

IsAvailable()

Determines whether this media block is available. Correct NuGet SDK redist should be included into your project.

public static bool IsAvailable()

Returns

bool

true if this media block is available; otherwise, false.

IMediaBlockInternals.SetContext(MediaBlocksPipeline)

Associates this stretch effect block with a pipeline and initializes its internal context. This method is called internally when the block is added to a pipeline.

void IMediaBlockInternals.SetContext(MediaBlocksPipeline pipeline)

Parameters

pipeline MediaBlocksPipeline

The MediaBlocksPipeline instance that will manage this block.

See Also