The edgeMode attribute determines how to extend the input image as necessary with color values so that the matrix operations can be applied when the kernel is positioned at or near the edge of the input image.

Two elements are using this attribute: <feConvolveMatrix> and <feGaussianBlur>

feConvolveMatrix

For <feConvolveMatrix>, edgeMode determines how to extend the input image as necessary with color values so that the matrix operations can be applied when the kernel is positioned at or near the edge of the input image.

Value duplicate | wrap | none
Default value duplicate
Animatable Yes
duplicate
This value indicates that the input image is extended along each of its borders as necessary by duplicating the color values at the given edge of the input image.
wrap
This value indicates that the input image is extended by taking the color values from the opposite edge of the image.
none
This value indicates that the input image is extended with pixel values of zero for R, G, B and A.

feGaussianBlur

For <feGaussianBlur>, edgeMode determines how to extend the input image as necessary with color values so that the matrix operations can be applied when the kernel is positioned at or near the edge of the input image.

Value duplicate | wrap | none
Default value none
Animatable Yes
duplicate
This value indicates that the input image is extended along each of its borders as necessary by duplicating the color values at the given edge of the input image.
wrap
This value indicates that the input image is extended by taking the color values from the opposite edge of the image.
none
This value indicates that the input image is extended with pixel values of zero for R, G, B and A.

Specifications

Specification Status Comment
Filter Effects Module Level 1
The definition of 'edgeMode for <feGaussianBlur>' in that specification.
Working Draft Initial definition for <feGaussianBlur>
Filter Effects Module Level 1
The definition of 'edgeMode for <feConvolveMatrix>' in that specification.
Working Draft No change
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'edgeMode for <feConvolveMatrix>' in that specification.
Recommendation Initial definition for <feConvolveMatrix>

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