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HSL
HSL
RGB
  • Drawing in PHP
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Stored procedures
Creates a color from its hue, saturation and lightness.
Example
// Color an area in light blue
dFill(10, 50, HSL(180, 100, 50))
Syntax
<Result> = HSL(<Color Hue> , <Color Saturation> , <Color Lightness>)
<Result>: Integer
Value of the color. This value can be used in all WLanguage functions that handle a color.
<Color Hue>: Integer
Value included between 0 and 360 (angle of chromatic circle). The red color corresponds to 0°.
<Color Saturation>: Integer
Value included between 0 and 100 (percentage of saturation).
<Color Lightness>: Integer
Value included between 0 and 100 (percentage of lightness).
Remarks
PHP

Drawing in 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:
Modifying the Hue, Saturation and Lightness 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: wd270std.dll
See also
Minimum version required
  • Version 10
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