<Image>.ModifyHSL (Function)

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<Image>.ModifyHSL (Function)

In french: <Image>.ModifieTSL

Modifies the hue, the saturation and the lightness of an image in an Image control.

Versions 16 and later

This function is now available for Android applications.

New in version 16

This function is now available for Android applications.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Example

// Changes the hue, the lightness and the saturation
// of the image found in the IMG_Image1 control
IMG_Image1.ModifyHSL(50, 50, 50)

Syntax

<Result> = <Image control>.ModifyHSL(<Variation of hue> , <Variation of saturation> , <Variation of lightness> [, <Destination image>])

<Result>: Boolean

True if the change was performed,
False otherwise.

<Image control>: Control name

Name of the Image control to use.

<Variation of hue>: Integer

Value included between -360 and +360. This value will be added to the current hue of each pixel to get a new hue.

<Variation of saturation>: Integer

Value included between -100 and +100. This value will be added to the current saturation of each pixel to get a new saturation.

<Variation of lightness>: Integer

Value included between -100 and +100. This value will be added to the current lightness of each pixel to get a new lightness.

<Destination image>: Name of the Image control or variable

Image where the transformed image will be drawn. This image can correspond to:
the name of an Image control.
the name of an Image variable.
This type of variable is not available.
If this parameter is not specified, the transformation will be performed in <Image control>

Remarks

Pattern and PHP

In PHP, the drawing functions are based on the graphic library GD. This library is commonly used by the PHP hosting companies and therefore it is always enabled. The version of the GD library must be version 2.0.28 (or later). This library can be downloaded from the PHP site.

To enable (if necessary) this library locally, the following elements are required:

PHP installed.
the PHP.INI file found in the Windows directory must contain the following line: "extension=php_gd2.dll" (instead of ";extension=php_gd2.dll").
the php_gd2.dll file must exist in the directory of PHP extensions. This directory is defined in the PHP.INI file by the "extension_dir" variable.

Related Examples:

Unit examples (WINDEV): Modifying the Hue, Saturation and Lightness

[ + ] Process on the images via the WLanguage dModifyHSL function.
This function is used to modify the hue, the saturation and the lightness of an image.

Component: wd260pnt.dll