mask-type

The CSS mask-type property defines if a mask defined by an SVG <mask> element is used as a luminance or an alpha mask. It applies to the <mask> element. It may be overridden by the mask-mode property which has the same effect, but applies to the element where the mask is used. Alpha masks will generally be faster to render.

/* Keyword values */
mask-type: luminance;
mask-type: alpha;

/* Global values */
mask-type: inherit;
mask-type: initial;
mask-type: unset;

Syntax

One or more of the keyword values listed below, separated by commas.

Values

luminance

Is a keyword indicating that the associated mask image is a luminance mask, that is that its relative luminance values must be used when applying it.

alpha

Is a keyword indicating that the associated mask image is an alpha mask, that is that its alpha channel values must be used when applying it.

Formal syntax

luminance | alpha

Examples

Let's apply the following rectangle as a mask:

<rect x="10" y="10" width="80" height="80"
    fill="red" fill-opacity="0.7" />

which leads to the following square:

to this box:

The result, if your browser supports the property, with different value of mask-type applied to the <mask> element are these two different squares:

Specifications

Browser compatibility

See also

• Other mask-related properties: mask