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The in2 attribute identifies the second input for the given filter primitive. It works exactly like the in attribute.
Usage context
| Categories | None | 
|---|---|
| Value | SourceGraphic|SourceAlpha|BackgroundImage|BackgroundAlpha|FillPaint|StrokePaint| <filter-primitive-reference> | 
| Animatable | Yes | 
| Normative document | SVG 1.1 (2nd Edition) : feBlend SVG 1.1 (2nd Edition) : feComposite SVG 1.1 (2nd Edition) : feDisplacementMap | 
- SourceGraphic
- 
    This keyword represents the graphics elements that were the original input into the <filter>element.
- SourceAlpha
- 
    This keyword represents the graphics elements that were the original input into the <filter>element.SourceAlphahas all of the same rules asSourceGraphicexcept that only the alpha channel is used.
- BackgroundImage
- 
    This keyword represents an image snapshot of the SVG document under the filter region at the time that the <filter>element was invoked.
- BackgroundAlpha
- 
    Same as BackgroundImageexcept only the alpha channel is used.
- FillPaint
- 
    This keyword represents the value of the fillproperty on the target element for the filter effect. In many cases, theFillPaintis opaque everywhere, but it might not be the case if a shape is paint with a gradient or pattern which itself includes transparent or semi-transparent parts.
- StrokePaint
- 
    This keyword represents the value of the strokeproperty on the target element for the filter effect. In many cases, theStrokePaintis opaque everywhere, but it might not be the case if a shape is paint with a gradient or pattern which itself includes transparent or semi-transparent parts.
Example
Elements
The following elements can use the in2 attribute