By default, colour filters are processed in SRGB format. This is the same colour space as used by the rest of the graphics system, which means that no special conversion is necessary prior to and post filter processing. However, linear RGB is better suited for producing high quality results at a cost of speed.

Note that if SVG compatibility is required, linear RGB must be used as the default.

The following dimension flags are supported:

This field value will return a purpose-built string that defines the filter's effects in SVG compliant XML. The string is allocated and must be freed once no longer in use.

The height of the filter area is expressed here as a fixed or scaled coordinate. The Width and Height effectively restrain the working space for the effect processing, making them an important consideration for efficiency.

The coordinate system for the width and height depends on the value for Units.

The default values for Width and Height is 120%, as per the SVG standard. This provides a buffer space for the filter algorithms to work with, and is usually a sufficient default.

Attributes can be inherited from another filter by referencing that gradient in this field. This feature is provided primarily for the purpose of simplifying SVG compatibility and its use may result in an unnecessary performance penalty.

The opacity of the filter is defined as a value between 0.0 and 1.0, with 1.0 being fully opaque. The default value is 1.0.

PrimitiveUnits alters the behaviour of some effects when their dimensions are calculated. The default value is USERSPACE. When set to BOUNDING_BOX, the effect may calculate its dimensions strictly based on the client vector using a scaled coordinate space of (0, 0, 100%, 100%).

The combination of ResX and ResY define the available space for rendering of filter effects. It is recommended that the client does not set these values because the default 1:1 pixel ratio is appropriate in the majority of circumstances.

The combination of ResX and ResY define the available space for rendering of filter effects. It is recommended that the client does not set these values because the default 1:1 pixel ratio is appropriate in the majority of circumstances.

The default coordinate system is BOUNDING_BOX, which positions the filter within the client vector. The alternative is USERSPACE, which positions the filter relative to the client vector's nearest viewport.

The width of the filter area is expressed here as a fixed or scaled coordinate. The Width and Height effectively restrain the working space for the effect processing, making them an important consideration for efficiency.

The coordinate system for the width and height depends on the value for Units.

The default values for Width and Height is 120%, as per the SVG standard. This provides a buffer space for the filter algorithms to work with, and is usually a sufficient default.

The meaning of the (X, Y) field values depend on the value for Units. In userspace mode, the filter position will be relative to the client vector's parent viewport. In bounding-box mode, the filter position is relative to the vector's position. It is important to note that coordinates are measured before any transforms are applied.

The default values for X and Y is 10%, as per the SVG standard. This provides a buffer space for the filter algorithms to work with, and is usually a sufficient default.

The meaning of the (X, Y) field values depend on the value for Units. In userspace mode, the filter position will be relative to the client vector's parent viewport. In bounding-box mode, the filter position is relative to the vector's position. It is important to note that coordinates are measured before any transforms are applied.

The default values for X and Y is 10%, as per the SVG standard. This provides a buffer space for the filter algorithms to work with, and is usually a sufficient default.