Gif.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------
namespace think\image\gif;
class Gif
{
/**
* GIF帧列表
*
* @var array
*/
private $frames = [];
/**
* 每帧等待时间列表
*
* @var array
*/
private $delays = [];
/**
* 构造方法，用于解码GIF图片
*
* @param string $src GIF图片数据
* @param string $mod 图片数据类型
* @throws \Exception
*/
public function __construct($src = null, $mod = 'url')
{
if (!is_null($src)) {
if ('url' == $mod && is_file($src)) {
$src = file_get_contents($src);
}
/* 解码GIF图片 */
try {
$de = new Decoder($src);
$this->frames = $de->getFrames();
$this->delays = $de->getDelays();
} catch (\Exception $e) {
throw new \Exception("解码GIF图片出错");
}
}
}
/**
* 设置或获取当前帧的数据
*
* @param string $stream 二进制数据流
* @return mixed 获取到的数据
*/
public function image($stream = null)
{
if (is_null($stream)) {
$current = current($this->frames);
return false === $current ? reset($this->frames) : $current;
}
$this->frames[key($this->frames)] = $stream;
}
/**
* 将当前帧移动到下一帧
*
* @return string 当前帧数据
*/
public function nextImage()
{
return next($this->frames);
}
/**
* 编码并保存当前GIF图片
*
* @param string $pathname 图片名称
*/
public function save($pathname)
{
$gif = new Encoder($this->frames, $this->delays, 0, 2, 0, 0, 0, 'bin');
file_put_contents($pathname, $gif->getAnimation());
}
}