feComponentTransferTypeAttribute: type

In mslegrand/svgR: svgR is an R DSL to generate svg markup

Description

Governs the model of the component transfer. (linear, table, discrete, identity, gamma)

Available Attribute Values

The value can be any one of the following:

'identity'

Specifies the identify component transform (i.e. no transform).

'table'

Specifies to use a linear interpolation of the given tableValues for the transfer function.

'discrete'

Specifies to use a step function produced by the tableValues for the transfer function.

'linear'

Specifies to use a simple linear interpolation for the transfer function.

'gamma'

Specifies to use an exponential for the transfer function.

Component Mapping Algorithm Details

The compononet Mappin Algoritms are as follows:

• identity:

  • To use specify

    • type='identity'

  • Provides no mapping. In terms of color components, for each color component C, we have:

    C^{out}= C^{in}

• linear

  Specified by

  • type='linear'

  • slope=<NUMERIC> (default=1)

  • intercept=<NUMERIC> (default=0)

  • Maps the colors components using a linear function with the given slope and intercept. In terms of color components

    C^{out}= m \times C^{in} + b

    where m is given by the value of the slope attribute and b is given by the value of the intercept attribute.

• gamma

  Specified by

  • type='gamma'

  • exponent=<NUMERIC> (default=1)

  • amplitude=<NUMERIC> (default=1)

  • offset=<NUMERIC> (default=0)

  Maps the colors components non-linearly using a exponential function In terms of color components

  C_{out}= A \times C_{in}^B +C

  where, A is given by the amplitute attribute, B by the exponent attribute and C but the offset attribute.

• table

  • Specified by

    • type='table'

    • table=<NUMERIC VECTOR>

  • Maps the colors components using a continous piece-wise linear function defined by the valueTable attribute. In terms of color components and a valueTable attribute, v=c(v1,...,vn) for each color component C^{in}, we have:

    C^{out}= v_k + m_k \times (v_{k+1}- v_k)

    when C^{in}<1 and where k and m_k are given by

    k=floor(C^{in} \times n)

    and

    m_k= C^{in} \times n mod(k)

    In the case that C^{in}=1, then we set C^out=v_n

• discrete

  • Specified by

    • type='table'

    • table=<NUMERIC VECTOR>

  • Maps the colors components using a step function defined by the valueTable attribute. In terms of color components and a valueTable attribute, v=c(v1,...,vn) for each color component C^{in}, we have:

    C^{out}= v_k

    when C^{in}<1 and where k is given by

    k=floor(C^{in} \times n)

    In the case that C^{in}=1, then we set C^out=v_n

Used by the Elements

Uncategorized Elements

feFuncA, feFuncB, feFuncG, feFuncR

mslegrand/svgR documentation built on Jan. 21, 2020, 2:59 p.m.