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PgCalcColorContrast()

Compute light and dark colors to use for a gradient

Synopsis:

void PgCalcColorContrast( PgColor_t flat_color,
                          int contrast,
                          PgColor_t *light,
                          PgColor_t *dark );

Arguments:

flat_color

The base color towards which the computed colors are intended to converge. It's the color in the middle of the gradient.

contrast

The amount of contrast that you want in the gradient, ranging from 0 (low contrast) through 255 (high contrast). The contrast is biased towards the light color.

light

A pointer to the PgColor_t in which to store the lightest color for the gradient.

dark

A pointer to the PgColor_t in which to store the darkest color for the gradient.

Library:

ph

Description:

This function computes light and dark colors that can be used to construct gradients. It's used by Photon to compute bevel gradients.

Classification:

Photon

Safety:
Interrupt handler	No
Signal handler	No
Thread	No

See also:

PgBackgroundShadings(), PgColor_t

"Gradients" in the Raw Drawing and Animation chapter of the Photon Programmer's Guide

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