Colorize QML Type

Sets the color in the HSL color space. 更多...

import 语句：	import QtGraphicalEffects 1.12
Since:	QtGraphicalEffects 1.0
继承：	Item

所有成员列表，包括继承成员

特性

cached : bool
hue : real
lightness : real
saturation : real
source : variant

详细描述

The effect is similar to what happens when a colorized glass is put on top of a grayscale image. Colorize uses the hue, saturation, and lightness (HSL) color space. You can specify a desired value for each property. You can shift all HSL values with the HueSaturation 效果。

Alternatively, you can use the ColorOverlay effect to colorize the source item in the RGBA color space.

源	Effect applied

注意： This effect is available when running with OpenGL.

范例

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
    }
    Colorize {
        anchors.fill: bug
        source: bug
        hue: 0.0
        saturation: 0.5
        lightness: -0.2
    }
}

特性文档编制

cached : bool

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 .

hue : real

This property defines the hue value which is used to colorize the source.

The value ranges from 0.0 to 1.0. By default, the property is set to 0.0 , which produces a slightly red color.

Allowed hue values

Output examples with different hue values

hue: 0.2	hue: 0.5	hue: 0.8
saturation : 1	saturation : 1	saturation : 1
lightness : 0	lightness : 0	lightness : 0

lightness : real

This property defines how much the source lightness value is increased or decreased.

Unlike hue and saturation properties, lightness does not set the used value, but it shifts the existing source pixel lightness value.

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

Output examples with different lightness values

lightness: -0.75	lightness: 0	lightness: 0.75
hue : 0	hue : 0	hue : 0
saturation : 1	saturation : 1	saturation : 1

saturation : real

This property defines the saturation value which is used to colorize the source.

The value ranges from 0.0 (desaturated) to 1.0 (saturated). By default, the property is set to 1.0 (saturated).

Output examples with different saturation values

saturation: 0	saturation: 0.5	saturation: 1
hue : 0	hue : 0	hue : 0
lightness : 0	lightness : 0	lightness : 0

source : variant

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

注意： It is not supported to let the effect include itself, for instance by setting source to the effect's parent.