IT. Expert System.

PHP

Define a color as transparent


imagecolortransparent

(PHP 4, PHP 5)

imagecolortransparentDefine a color as transparent

Description

int imagecolortransparent ( resource $image [, int $color ] )

Sets the transparent color in the given image.

Parameters

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

color

A color identifier created with imagecolorallocate().

Return Values

The identifier of the new (or current, if none is specified) transparent color is returned. If color is not specified, and the image has no transparent color, the returned identifier will be -1.

Examples

Example #1 imagecolortransparent() example

<?php
// Create a 55x30 image
$im imagecreatetruecolor(5530);
$red imagecolorallocate($im25500);
$black imagecolorallocate($im000);

// Make the background transparent
imagecolortransparent($im$black);

// Draw a red rectangle
imagefilledrectangle($im445025$red);

// Save the image
imagepng($im'./imagecolortransparent.png');
imagedestroy($im);
?>

The above example will output something similar to:

output of example : imagecolortransparent()

Notes

Note:

Transparency is copied only with imagecopymerge() and true color images, not with imagecopy() or pallete images.

Note:

The transparent color is a property of the image, transparency is not a property of the color. Once you have set a color to be the transparent color, any regions of the image in that color that were drawn previously will be transparent.



Content

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary

License.
All information of this service is derived from the free sources and is provided solely in the form of quotations. This service provides information and interfaces solely for the familiarization (not ownership) and under the "as is" condition.
Copyright 2016 © ELTASK.COM. All rights reserved.
Site is optimized for mobile devices.
Downloads: 2046 / . Delta: 0.05788 с