RGBRed (Function)

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Drawing in PHP

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RGBRed (Function)

In french: RVBRouge

Returns the red component of an RGB color.

Versions 15 and later

This function is now available for the Android applications.

New in version 15

This function is now available for the Android applications.

Versions 16 and later

This function is now available in Browser code.

This function is now available for the Windows Phone applications.

New in version 16

This function is now available in Browser code.

This function is now available for the Windows Phone applications.

This function is now available in Browser code.

This function is now available for the Windows Phone applications.

Versions 17 and later

This function is now available for the iPhone/iPad applications.

New in version 17

This function is now available for the iPhone/iPad applications.

Versions 18 and later

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

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

RGBRed(RGB(128, 38, 15)) // Returns 128

Syntax

<Result> = RGBRed(<RGB Color>)

<Result>: Integer

Red component of RGB color (included between 0 and 255).

<RGB Color>: Integer

Color (24 bits). This color is the result of the following formula:
Color = 65536 * Blue Component + 256 * Green Component + Red Component.

Remarks

Various

RGB returns the identifier of the color described from its Red, Green and Blue components.
RGBBlue returns the blue component of an RGB color. RGBGreen returns the green component of an RGB color.

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.

Component : wd250std.dll