HueSaturation QML Type
Alters the source item colors in the HSL color space. More...
| Import Statement: | import QtGraphicalEffects 1.15 |
| Since: | QtGraphicalEffects 1.0 |
| Inherits: |
Properties
- cached : bool
- hue : real
- lightness : real
- saturation : real
- source : variant
Detailed Description
HueSaturation is similar to the Colorize effect, but the hue and saturation property values are handled differently. The HueSaturation effect always shifts the hue, saturation, and lightness from the original, instead of setting them.
| Source | Effect applied |
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Note: This effect is available when running with OpenGL.
Example
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 } HueSaturation { anchors.fill: bug source: bug hue: -0.3 saturation: 0.5 lightness: -0.1 } }
Property Documentation
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 added to the source hue value.
The value ranges from -1.0 (decrease) to 1.0 (increase). By default, the property is set to 0.0 (no change).
| Output examples with different hue values | ||
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| hue: -0.3 | hue: 0.0 | hue: 0.3 |
| saturation: 0 | saturation: 0 | saturation: 0 |
| lightness: 0 | lightness: 0 | lightness: 0 |
lightness : real |
This property defines the lightness value which is added to the source saturation value.
The value ranges from -1.0 (decrease) to 1.0 (increase). By default, the property is set to 0.0 (no change).
| Output examples with different lightness values | ||
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| lightness: -0.5 | lightness: 0.0 | lightness: 0.5 |
| hue: 0 | hue: 0 | hue: 0 |
| saturation: 0 | saturation: 0 | saturation: 0 |
saturation : real |
This property defines the saturation value value which is added to the source saturation value.
The value ranges from -1.0 (decrease) to 1.0 (increase). By default, the property is set to 0.0 (no change).
source : variant |
This property defines the source item that provides the source pixels for the effect.
Note: It is not supported to let the effect include itself, for instance by setting source to the effect's parent.