operator
The operator
attribute has two meanings based on the context it's used in. Either it defines the compositing or morphing operation to be performed.
You can use this attribute with the following SVG elements:
Example
<svg viewBox="0 0 120 70" xmlns="http://www.w3.org/2000/svg">
<filter id="erode">
<feMorphology operator="erode" radius="0.4" />
</filter>
<filter id="dilate">
<feMorphology operator="dilate" radius="0.8" />
</filter>
<text x="0" y="15">Normal text</text>
<text x="0" y="40" filter="url(#erode)">Thin text</text>
<text x="0" y="65" filter="url(#dilate)">Fat text</text>
</svg>
feComposite
For <feComposite>
, operator
defines the compositing operation that is to be performed.
Value |
over | in | out |
atop | xor | lighter |
arithmetic
|
---|---|
Default value | over |
Animatable | Yes |
over
-
This value indicates that the source graphic defined in the
in
attribute is placed over the destination graphic defined in thein2
attribute. in
-
This value indicates that the parts of the source graphic defined in the
in
attribute that overlap the destination graphic defined in thein2
attribute, replace the destination graphic. out
-
This value indicates that the parts of the source graphic defined in the
in
attribute that fall outside the destination graphic defined in thein2
attribute, are displayed. atop
-
This value indicates that the parts of the source graphic defined in the
in
attribute, which overlap the destination graphic defined in thein2
attribute, replace the destination graphic. The parts of the destination graphic that do not overlap with the source graphic stay untouched. xor
-
This value indicates that the non-overlapping regions of the source graphic defined in the
in
attribute and the destination graphic defined in thein2
attribute are combined. lighter
-
This value indicates that the sum of the source graphic defined in the
in
attribute and the destination graphic defined in thein2
attribute is displayed. arithmetic
-
This value indicates that the source graphic defined in the
in
attribute and the destination graphic defined in thein2
attribute are combined using the following formula:result = k1*i1*i2 + k2*i1 + k3*i2 + k4
where:
i1
andi2
indicate the corresponding pixel channel values of the input image, which map toin
andin2
respectively, andk1
,k2
,k3
, andk4
indicate the values of the attributes with the same name.
feMorphology
For <feMorphology>
, operator
defines whether to erode (i.e., thin) or dilate (fatten) the source graphic.
Value | erode | dilate |
---|---|
Default value | erode |
Animatable | Yes |
Specifications
Specification |
---|
Filter Effects Module Level 1 # element-attrdef-femorphology-operator |
Filter Effects Module Level 1 # element-attrdef-fecomposite-operator |