Desaturate QML Type

The following example shows how to apply the effect.

import QtQuick 2.12
import QtGraphicalEffects 1.12

Item {
    width: 300
    height: 300

    Image {
        id: bug
        source: "images/bug.jpg"
        sourceSize: Qt.size(parent.width, parent.height)
        smooth: true
        visible: false
    }

    Desaturate {
        anchors.fill: bug
        source: bug
        desaturation: 0.8
    }
}

This property allows the effect output pixels to be cached in order to improve the rendering performance.

Every time the source or effect properties are changed, the pixels in the cache must be updated. Memory consumption is increased, because an extra buffer of memory is required for storing the effect output.

It is recommended to disable the cache when the source or the effect properties are animated.

By default, the property is set to false.

This property defines how much the source colors are desaturated.

The value ranges from 0.0 (no change) to 1.0 (desaturated). By default, the property is set to 0.0 (no change).

Output examples with different desaturation values
desaturation: 0.0	desaturation: 0.5	desaturation: 1.0

This property defines the source item that provides the source pixels to the effect.