图片类 支持GD和Imagick,gif动画类型
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2022-04-16 11:27:14
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1. [文件] Image.class.php
<?php
namespace YBL;
class Image{
/* 驱动相关常量定义 */
const IMAGE_GD = 0; //常量，标识GD库类型
const IMAGE_IMAGICK = 1; //常量，标识imagick库类型
/* 缩略图相关常量定义 */
const IMAGE_THUMB_SCALE = 0 ; //常量，标识缩略图等比例缩放类型
const IMAGE_THUMB_FILLED = 1 ; //常量，标识缩略图缩放后填充类型
const IMAGE_THUMB_CENTER = 2 ; //常量，标识缩略图居中裁剪类型
const IMAGE_THUMB_NORTHWEST = 3 ; //常量，标识缩略图左上角裁剪类型
const IMAGE_THUMB_SOUTHEAST = 4 ; //常量，标识缩略图右下角裁剪类型
const IMAGE_THUMB_FIXED = 5 ; //常量，标识缩略图固定尺寸缩放类型
/* 水印相关常量定义 */
const IMAGE_WATER_CENTER = 0 ; //常量，标识居中水印
const IMAGE_WATER_NORTHWEST = 1 ; //常量，标识左上角水印
const IMAGE_WATER_NORTH = 2 ; //常量，标识上居中水印
const IMAGE_WATER_NORTHEAST = 3 ; //常量，标识右上角水印
const IMAGE_WATER_EAST = 4 ; //常量，标识右居中水印
const IMAGE_WATER_SOUTHEAST = 5 ; //常量，标识右下角水印
const IMAGE_WATER_SOUTH = 6 ; //常量，标识下居中水印
const IMAGE_WATER_SOUTHWEST = 7 ; //常量，标识左下角水印
const IMAGE_WATER_WEST = 8 ; //常量，标识左居中水印
/**
* 图片资源
* @var resource
*/
private $img;
/**
* 构造方法，用于实例化一个图片处理对象
* @param string $type 要使用的类库，默认使用GD库
*/
public function __construct($gif_proess=false,$type = self::IMAGE_GD){
/* 判断调用库的类型 */
switch ($type) {
case self::IMAGE_GD:
$class = 'Gd';
break;
case self::IMAGE_IMAGICK:
$class ='Imagick';
break;
default:
exit('不支持的图片处理库类型');
}
/* 引入处理库，实例化图片处理对象 */
include_once($class.'.class.php');
$class = __NAMESPACE__.'\\'.$class;
$this->img = new $class($gif_proess);
}
/**
* 打开一幅图像
* @param string $imgname 图片路径
* @return Object 当前图片处理库对象
*/
public function open($imgname){
$this->img->open($imgname);
return $this;
}
/**
* 保存图片
* @param string $imgname 图片保存名称
* @param string $type 图片类型
* @param integer $quality 图像质量
* @param boolean $interlace 是否对JPEG类型图片设置隔行扫描
* @return Object 当前图片处理库对象
*/
public function save($imgname, $type = null, $quality=80,$interlace = true){
$this->img->save($imgname, $type, $quality,$interlace);
return $this;
}
/**
* 返回图片宽度
* @return integer 图片宽度
*/
public function width(){
return $this->img->width();
}
/**
* 返回图片高度
* @return integer 图片高度
*/
public function height(){
return $this->img->height();
}
/**
* 返回图像类型
* @return string 图片类型
*/
public function type(){
return $this->img->type();
}
/**
* 返回图像MIME类型
* @return string 图像MIME类型
*/
public function mime(){
return $this->img->mime();
}
/**
* 返回图像尺寸数组 0 - 图片宽度，1 - 图片高度
* @return array 图片尺寸
*/
public function size(){
return $this->img->size();
}
/**
* 裁剪图片
* @param integer $w 裁剪区域宽度
* @param integer $h 裁剪区域高度
* @param integer $x 裁剪区域x坐标
* @param integer $y 裁剪区域y坐标
* @param integer $width 图片保存宽度
* @param integer $height 图片保存高度
* @return Object 当前图片处理库对象
*/
public function crop($w, $h, $x = 0, $y = 0, $width = null, $height = null){
$this->img->crop($w, $h, $x, $y, $width, $height);
return $this;
}
/**
* 生成缩略图
* @param integer $width 缩略图最大宽度
* @param integer $height 缩略图最大高度
* @param integer $type 缩略图裁剪类型
* @return Object 当前图片处理库对象
*/
public function thumb($width, $height, $type = self::IMAGE_THUMB_SCALE){
$this->img->thumb($width, $height, $type);
return $this;
}
/**
* 添加水印
* @param string $source 水印图片路径
* @param integer $locate 水印位置
* @param integer $alpha 水印透明度
* @return Object 当前图片处理库对象
*/
public function water($source, $locate = self::IMAGE_WATER_SOUTHEAST,$alpha=80){
$this->img->water($source, $locate,$alpha);
return $this;
}
/**
* 图像添加文字
* @param string $text 添加的文字
* @param string $font 字体路径
* @param integer $size 字号
* @param string $color 文字颜色
* @param integer $locate 文字写入位置
* @param integer $offset 文字相对当前位置的偏移量
* @param integer $angle 文字倾斜角度
* @return Object 当前图片处理库对象
*/
public function text($text, $font, $size, $color = '#00000000',$locate = self::IMAGE_WATER_SOUTHEAST, $offset = 0, $angle = 0){
$this->img->text($text, $font, $size, $color, $locate, $offset, $angle);
return $this;
}
}
2. [文件] Gd.class.php
<?php
namespace YBL;
class Gd{
/**
* 图像资源对象
* @var resource
*/
private $img;
/**
* 图像信息，包括width,height,type,mime,size
* @var array
*/
private $info;
public $error;
/**
* 构造方法，可用于打开一张图像
* @param string $imgname 图像路径
*/
private $gif_proess;
public function __construct($gif_proess=true) {
$this->gif_proess=$gif_proess;
}
/**
* 打开一张图像
* @param string $imgname 图像路径
*/
public function open($imgname){
//检测图像文件
if(!is_file($imgname)){
$this->error='不存在的图像文件';
return false;
}
//获取图像信息
$info = getimagesize($imgname);
//检测图像合法性
if(false === $info || (IMAGETYPE_GIF === $info[2] && empty($info['bits']))){
$this->error='非法图像文件';
return false;
}
//设置图像信息
$this->info = array(
'width' => $info[0],
'height' => $info[1],
'type' => image_type_to_extension($info[2], false),
'mime' => $info['mime'],
);
//销毁已存在的图像
empty($this->img) || imagedestroy($this->img);
//打开图像
if(('gif' == $this->info['type'])&&$this->gif_proess){
$this->gif = new GIF($imgname);
$this->img = imagecreatefromstring($this->gif->image());
} else {
$fun = "imagecreatefrom{$this->info['type']}";
$this->img = $fun($imgname);
}
}
/**
* 保存图像
* @param string $imgname 图像保存名称
* @param string $type 图像类型
* @param integer $quality 图像质量
* @param boolean $interlace 是否对JPEG类型图像设置隔行扫描
*/
public function save($imgname, $type = null, $quality=80,$interlace = true){
if(empty($this->img)){
$this->error='没有可以被保存的图像资源';
return false;
}
//自动获取图像类型
if(is_null($type)){
$type = $this->info['type'];
} else {
$type = strtolower($type);
}
//保存图像
if('jpeg' == $type || 'jpg' == $type){
//JPEG图像设置隔行扫描
imageinterlace($this->img, $interlace);
imagejpeg($this->img, $imgname,$quality);
}elseif(('gif' == $type)&& !empty($this->gif)){
$this->gif->save($imgname);
}else{
$fun = 'image'.$type;
$fun($this->img, $imgname);
}
}
/**
* 返回图像宽度
* @return integer 图像宽度
*/
public function width(){
if(empty($this->img)){
$this->error='没有指定图像资源';
return false;
}
return $this->info['width'];
}
/**
* 返回图像高度
* @return integer 图像高度
*/
public function height(){
if(empty($this->img)){
$this->error='没有指定图像资源';
return false;
}
return $this->info['height'];
}
/**
* 返回图像类型
* @return string 图像类型
*/
public function type(){
if(empty($this->img)){$this->error='没有指定图像资源';
return false;}
return $this->info['type'];
}
/**
* 返回图像MIME类型
* @return string 图像MIME类型
*/
public function mime(){
if(empty($this->img)){
$this->error='没有指定图像资源';
return false;
}
return $this->info['mime'];
}
/**
* 返回图像尺寸数组 0 - 图像宽度，1 - 图像高度
* @return array 图像尺寸
*/
public function size(){
if(empty($this->img)) {
$this->error='没有指定图像资源';
return false;
}
return array($this->info['width'], $this->info['height']);
}
/**
* 裁剪图像
* @param integer $w 裁剪区域宽度
* @param integer $h 裁剪区域高度
* @param integer $x 裁剪区域x坐标
* @param integer $y 裁剪区域y坐标
* @param integer $width 图像保存宽度
* @param integer $height 图像保存高度
*/
public function crop($w, $h, $x = 0, $y = 0, $width = null, $height = null){
if(empty($this->img)){
$this->error='没有可以被裁剪的图像资源';
return false;
}
//设置保存尺寸
empty($width) && $width = $w;
empty($height) && $height = $h;
do {
//创建新图像
$img = imagecreatetruecolor($width, $height);
// 调整默认颜色
$color = imagecolorallocate($img, 255, 255, 255);
imagefill($img, 0, 0, $color);
//裁剪
imagecopyresampled($img, $this->img, 0, 0, $x, $y, $width, $height, $w, $h);
imagedestroy($this->img); //销毁原图
//设置新图像
$this->img = $img;
} while(!empty($this->gif)&&$this->gifNext());
$this->info['width'] = $width;
$this->info['height'] = $height;
}
/**
* 生成缩略图
* @param integer $width 缩略图最大宽度
* @param integer $height 缩略图最大高度
* @param integer $type 缩略图裁剪类型
*/
public function thumb($width, $height, $type = Image::IMAGE_THUMB_SCALE){
if(empty($this->img)){
$this->error='没有可以被缩略的图像资源';
return false;
}
//原图宽度和高度
$w = $this->info['width'];
$h = $this->info['height'];
/* 计算缩略图生成的必要参数 */
switch ($type) {
/* 等比例缩放 */
case Image::IMAGE_THUMB_SCALE:
//原图尺寸小于缩略图尺寸则不进行缩略
if($w < $width && $h < $height) return;
//计算缩放比例
$scale = min($width/$w, $height/$h);
//设置缩略图的坐标及宽度和高度
$x = $y = 0;
$width = $w * $scale;
$height = $h * $scale;
break;
/* 居中裁剪 */
case Image::IMAGE_THUMB_CENTER:
//计算缩放比例
$scale = max($width/$w, $height/$h);
//设置缩略图的坐标及宽度和高度
$w = $width/$scale;
$h = $height/$scale;
$x = ($this->info['width'] - $w)/2;
$y = ($this->info['height'] - $h)/2;
break;
/* 左上角裁剪 */
case Image::IMAGE_THUMB_NORTHWEST:
//计算缩放比例
$scale = max($width/$w, $height/$h);
//设置缩略图的坐标及宽度和高度
$x = $y = 0;
$w = $width/$scale;
$h = $height/$scale;
break;
/* 右下角裁剪 */
case Image::IMAGE_THUMB_SOUTHEAST:
//计算缩放比例
$scale = max($width/$w, $height/$h);
//设置缩略图的坐标及宽度和高度
$w = $width/$scale;
$h = $height/$scale;
$x = $this->info['width'] - $w;
$y = $this->info['height'] - $h;
break;
/* 填充 */
case Image::IMAGE_THUMB_FILLED:
//计算缩放比例
if($w < $width && $h < $height){
$scale = 1;
} else {
$scale = min($width/$w, $height/$h);
}
//设置缩略图的坐标及宽度和高度
$neww = $w * $scale;
$newh = $h * $scale;
$posx = ($width - $w * $scale)/2;
$posy = ($height - $h * $scale)/2;
do{
//创建新图像
$img = imagecreatetruecolor($width, $height);
// 调整默认颜色
$color = imagecolorallocate($img, 255, 255, 255);
imagefill($img, 0, 0, $color);
//裁剪
imagecopyresampled($img, $this->img, $posx, $posy, $x, $y, $neww, $newh, $w, $h);
imagedestroy($this->img); //销毁原图
$this->img = $img;
} while(!empty($this->gif)&&$this->gifNext());
$this->info['width'] = $width;
$this->info['height'] = $height;
return;
/* 固定 */
case Image::IMAGE_THUMB_FIXED:
$x = $y = 0;
break;
default:
$this->error='不支持的缩略图裁剪类型';
return false;
}
/* 裁剪图像 */
$this->crop($w, $h, $x, $y, $width, $height);
}
/**
* 添加水印
* @param string $source 水印图片路径
* @param integer $locate 水印位置
* @param integer $alpha 水印透明度
*/
public function water($source, $locate = Image::IMAGE_WATER_SOUTHEAST,$alpha=80){
//资源检测
if(empty($this->img)) {
$this->error='没有可以被添加水印的图像资源';
return false;
}
if(!is_file($source)) {
$this->error='水印图像不存在';
return false;
}
//获取水印图像信息
$info = getimagesize($source);
if(false === $info || (IMAGETYPE_GIF === $info[2] && empty($info['bits']))){
$this->error='非法水印文件';
return false;
}
//创建水印图像资源
$fun = 'imagecreatefrom' . image_type_to_extension($info[2], false);
$water = $fun($source);
//设定水印图像的混色模式
imagealphablending($water, true);
/* 设定水印位置 */
switch ($locate) {
/* 右下角水印 */
case Image::IMAGE_WATER_SOUTHEAST:
$x = $this->info['width'] - $info[0];
$y = $this->info['height'] - $info[1];
break;
/* 左下角水印 */
case Image::IMAGE_WATER_SOUTHWEST:
$x = 0;
$y = $this->info['height'] - $info[1];
break;
/* 左上角水印 */
case Image::IMAGE_WATER_NORTHWEST:
$x = $y = 0;
break;
/* 右上角水印 */
case Image::IMAGE_WATER_NORTHEAST:
$x = $this->info['width'] - $info[0];
$y = 0;
break;
/* 居中水印 */
case Image::IMAGE_WATER_CENTER:
$x = ($this->info['width'] - $info[0])/2;
$y = ($this->info['height'] - $info[1])/2;
break;
/* 下居中水印 */
case Image::IMAGE_WATER_SOUTH:
$x = ($this->info['width'] - $info[0])/2;
$y = $this->info['height'] - $info[1];
break;
/* 右居中水印 */
case Image::IMAGE_WATER_EAST:
$x = $this->info['width'] - $info[0];
$y = ($this->info['height'] - $info[1])/2;
break;
/* 上居中水印 */
case Image::IMAGE_WATER_NORTH:
$x = ($this->info['width'] - $info[0])/2;
$y = 0;
break;
/* 左居中水印 */
case Image::IMAGE_WATER_WEST:
$x = 0;
$y = ($this->info['height'] - $info[1])/2;
break;
default:
/* 自定义水印坐标 */
if(is_array($locate)){
list($x, $y) = $locate;
} else {$this->error='不支持的水印位置类型';
return false;
}
}
do{
//添加水印
$src = imagecreatetruecolor($info[0], $info[1]);
// 调整默认颜色
$color = imagecolorallocate($src, 255, 255, 255);
imagefill($src, 0, 0, $color);
imagecopy($src, $this->img, 0, 0, $x, $y, $info[0], $info[1]);
imagecopy($src, $water, 0, 0, 0, 0, $info[0], $info[1]);
imagecopymerge($this->img, $src, $x, $y, 0, 0, $info[0], $info[1], $alpha);
//销毁零时图片资源
imagedestroy($src);
} while(!empty($this->gif)&&$this->gifNext());
//销毁水印资源
imagedestroy($water);
}
/**
* 图像添加文字
* @param string $text 添加的文字
* @param string $font 字体路径
* @param integer $size 字号
* @param string $color 文字颜色
* @param integer $locate 文字写入位置
* @param integer $offset 文字相对当前位置的偏移量
* @param integer $angle 文字倾斜角度
*/
public function text($text, $font, $size, $color = '#00000000',
$locate = Image::IMAGE_WATER_SOUTHEAST, $offset = 0, $angle = 0){
//资源检测
if(empty($this->img)){
$this->error='没有可以被写入文字的图像资源';
return false;
}
if(!is_file($font)){
$this->error="不存在的字体文件：{$font}";
return false;
}
//获取文字信息
$info = imagettfbbox($size, $angle, $font, $text);
$minx = min($info[0], $info[2], $info[4], $info[6]);
$maxx = max($info[0], $info[2], $info[4], $info[6]);
$miny = min($info[1], $info[3], $info[5], $info[7]);
$maxy = max($info[1], $info[3], $info[5], $info[7]);
/* 计算文字初始坐标和尺寸 */
$x = $minx;
$y = abs($miny);
$w = $maxx - $minx;
$h = $maxy - $miny;
/* 设定文字位置 */
switch ($locate) {
/* 右下角文字 */
case Image::IMAGE_WATER_SOUTHEAST:
$x += $this->info['width'] - $w;
$y += $this->info['height'] - $h;
break;
/* 左下角文字 */
case Image::IMAGE_WATER_SOUTHWEST:
$y += $this->info['height'] - $h;
break;
/* 左上角文字 */
case Image::IMAGE_WATER_NORTHWEST:
// 起始坐标即为左上角坐标，无需调整
break;
/* 右上角文字 */
case Image::IMAGE_WATER_NORTHEAST:
$x += $this->info['width'] - $w;
break;
/* 居中文字 */
case Image::IMAGE_WATER_CENTER:
$x += ($this->info['width'] - $w)/2;
$y += ($this->info['height'] - $h)/2;
break;
/* 下居中文字 */
case Image::IMAGE_WATER_SOUTH:
$x += ($this->info['width'] - $w)/2;
$y += $this->info['height'] - $h;
break;
/* 右居中文字 */
case Image::IMAGE_WATER_EAST:
$x += $this->info['width'] - $w;
$y += ($this->info['height'] - $h)/2;
break;
/* 上居中文字 */
case Image::IMAGE_WATER_NORTH:
$x += ($this->info['width'] - $w)/2;
break;
/* 左居中文字 */
case Image::IMAGE_WATER_WEST:
$y += ($this->info['height'] - $h)/2;
break;
default:
/* 自定义文字坐标 */
if(is_array($locate)){
list($posx, $posy) = $locate;
$x += $posx;
$y += $posy;
} else {$this->error='不支持的文字位置类型';
return false;
}
}
/* 设置偏移量 */
if(is_array($offset)){
$offset = array_map('intval', $offset);
list($ox, $oy) = $offset;
} else{
$offset = intval($offset);
$ox = $oy = $offset;
}
/* 设置颜色 */
if(is_string($color) && 0 === strpos($color, '#')){
$color = str_split(substr($color, 1), 2);
$color = array_map('hexdec', $color);
if(empty($color[3]) || $color[3] > 127){
$color[3] = 0;
}
} elseif (!is_array($color)) {
$this->error='错误的颜色值';
return false;
}
do{
/* 写入文字 */
$col = imagecolorallocatealpha($this->img, $color[0], $color[1], $color[2], $color[3]);
imagettftext($this->img, $size, $angle, $x + $ox, $y + $oy, $col, $font, $text);
} while(!empty($this->gif)&&$this->gifNext());
}
/* 切换到GIF的下一帧并保存当前帧，内部使用 */
private function gifNext(){
ob_start();
ob_implicit_flush(0);
imagegif($this->img);
$img = ob_get_clean();
$this->gif->image($img);
$next = $this->gif->nextImage();
if($next){
$this->img = imagecreatefromstring($next);
return $next;
} else {
$this->img = imagecreatefromstring($this->gif->image());
return false;
}
}
/**
* 析构方法，用于销毁图像资源
*/
public function __destruct() {
empty($this->img) || imagedestroy($this->img);
}
}
class GIF{
/**
* GIF帧列表
* @var array
*/
private $frames = array();
/**
* 每帧等待时间列表
* @var array
*/
private $delays = array();
/**
* 构造方法，用于解码GIF图片
* @param string $src GIF图片数据
* @param string $mod 图片数据类型
*/
public function __construct($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{
$de = new GIFDecoder($src);
$this->frames = $de->GIFGetFrames();
$this->delays = $de->GIFGetDelays();
} catch(Exception $e){
$this->error='解码GIF图片出错';
return false;
}
}
}
/**
* 设置或获取当前帧的数据
* @param string $stream 二进制数据流
* @return boolean 获取到的数据
*/
public function image($stream = null){
if(is_null($stream)){
$current = current($this->frames);
return false === $current ? reset($this->frames) : $current;
} else {
$this->frames[key($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 $gifname 图片名称
*/
public function save($gifname){
$gif = new GIFEncoder($this->frames, $this->delays, 0, 2, 0, 0, 0, 'bin');
file_put_contents($gifname, $gif->GetAnimation());
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder Version 2.0 by László Zsidi, http://gifs.hu
::
:: This class is a rewritten 'GifMerge.class.php' version.
::
:: Modification:
:: - Simplified and easy code,
:: - Ultra fast encoding,
:: - Built-in errors,
:: - Stable working
::
::
:: Updated at 2007. 02. 13. '00.05.AM'
::
::
::
:: Try on-line GIFBuilder Form demo based on GIFEncoder.
::
:: http://gifs.hu/phpclasses/demos/GifBuilder/
::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*/
Class GIFEncoder {
private $GIF = "GIF89a"; /* GIF header 6 bytes */
private $VER = "GIFEncoder V2.05"; /* Encoder version */
private $BUF = Array ( );
private $LOP = 0;
private $DIS = 2;
private $COL = -1;
private $IMG = -1;
private $ERR = Array (
'ERR00' => "Does not supported function for only one image!",
'ERR01' => "Source is not a GIF image!",
'ERR02' => "Unintelligible flag ",
'ERR03' => "Does not make animation from animated GIF source",
);
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFEncoder...
::
*/
public function __construct($GIF_src, $GIF_dly, $GIF_lop, $GIF_dis,$GIF_red, $GIF_grn, $GIF_blu, $GIF_mod) {
if ( ! is_array ( $GIF_src ) && ! is_array ( $GIF_dly ) ) {
printf ( "%s: %s", $this->VER, $this->ERR [ 'ERR00' ] );
exit ( 0 );
}
$this->LOP = ( $GIF_lop > -1 ) ? $GIF_lop : 0;
$this->DIS = ( $GIF_dis > -1 ) ? ( ( $GIF_dis < 3 ) ? $GIF_dis : 3 ) : 2;
$this->COL = ( $GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1 ) ?
( $GIF_red | ( $GIF_grn << 8 ) | ( $GIF_blu << 16 ) ) : -1;
for ( $i = 0; $i < count ( $GIF_src ); $i++ ) {
if ( strToLower ( $GIF_mod ) == "url" ) {
$this->BUF [ ] = fread ( fopen ( $GIF_src [ $i ], "rb" ), filesize ( $GIF_src [ $i ] ) );
}
else if ( strToLower ( $GIF_mod ) == "bin" ) {
$this->BUF [ ] = $GIF_src [ $i ];
}
else {
printf ( "%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod );
exit ( 0 );
}
if ( substr ( $this->BUF [ $i ], 0, 6 ) != "GIF87a" && substr ( $this->BUF [ $i ], 0, 6 ) != "GIF89a" ) {
printf ( "%s: %d %s", $this->VER, $i, $this->ERR [ 'ERR01' ] );
exit ( 0 );
}
for ( $j = ( 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) ), $k = TRUE; $k; $j++ ) {
switch ( $this->BUF [ $i ] { $j } ) {
case "!":
if ( ( substr ( $this->BUF [ $i ], ( $j + 3 ), 8 ) ) == "NETSCAPE" ) {
printf ( "%s: %s ( %s source )!", $this->VER, $this->ERR [ 'ERR03' ], ( $i + 1 ) );
exit ( 0 );
}
break;
case ";":
$k = FALSE;
break;
}
}
}
$this->GIFAddHeader ( );
for ( $i = 0; $i < count ( $this->BUF ); $i++ ) {
$this->GIFAddFrames ( $i, $GIF_dly [ $i ] );
}
$this->GIFAddFooter ( );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddHeader...
::
*/
private function GIFAddHeader ( ) {
$cmap = 0;
if ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x80 ) {
$cmap = 3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) );
$this->GIF .= substr ( $this->BUF [ 0 ], 6, 7 );
$this->GIF .= substr ( $this->BUF [ 0 ], 13, $cmap );
$this->GIF .= "!\377\13NETSCAPE2.0\3\1" . $this->GIFWord ( $this->LOP ) . "\0";
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFrames...
::
*/
private function GIFAddFrames ( $i, $d ) {
$Locals_str = 13 + 3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) );
$Locals_end = strlen ( $this->BUF [ $i ] ) - $Locals_str - 1;
$Locals_tmp = substr ( $this->BUF [ $i ], $Locals_str, $Locals_end );
$Global_len = 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
$Locals_len = 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
$Global_rgb = substr ( $this->BUF [ 0 ], 13,
3 * ( 2 << ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 ) ) );
$Locals_rgb = substr ( $this->BUF [ $i ], 13,
3 * ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ) );
$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 0 ) .
chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . "\x0\x0";
if ( $this->COL > -1 && ord ( $this->BUF [ $i ] { 10 } ) & 0x80 ) {
for ( $j = 0; $j < ( 2 << ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 ) ); $j++ ) {
if (
ord ( $Locals_rgb { 3 * $j + 0 } ) == ( ( $this->COL >> 16 ) & 0xFF ) &&
ord ( $Locals_rgb { 3 * $j + 1 } ) == ( ( $this->COL >> 8 ) & 0xFF ) &&
ord ( $Locals_rgb { 3 * $j + 2 } ) == ( ( $this->COL >> 0 ) & 0xFF )
) {
$Locals_ext = "!\xF9\x04" . chr ( ( $this->DIS << 2 ) + 1 ) .
chr ( ( $d >> 0 ) & 0xFF ) . chr ( ( $d >> 8 ) & 0xFF ) . chr ( $j ) . "\x0";
break;
}
}
}
switch ( $Locals_tmp { 0 } ) {
case "!":
$Locals_img = substr ( $Locals_tmp, 8, 10 );
$Locals_tmp = substr ( $Locals_tmp, 18, strlen ( $Locals_tmp ) - 18 );
break;
case ",":
$Locals_img = substr ( $Locals_tmp, 0, 10 );
$Locals_tmp = substr ( $Locals_tmp, 10, strlen ( $Locals_tmp ) - 10 );
break;
}
if ( ord ( $this->BUF [ $i ] { 10 } ) & 0x80 && $this->IMG > -1 ) {
if ( $Global_len == $Locals_len ) {
if ( $this->GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) ) {
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
}
else {
$byte = ord ( $Locals_img { 9 } );
$byte |= 0x80;
$byte &= 0xF8;
$byte |= ( ord ( $this->BUF [ 0 ] { 10 } ) & 0x07 );
$Locals_img { 9 } = chr ( $byte );
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
}
}
else {
$byte = ord ( $Locals_img { 9 } );
$byte |= 0x80;
$byte &= 0xF8;
$byte |= ( ord ( $this->BUF [ $i ] { 10 } ) & 0x07 );
$Locals_img { 9 } = chr ( $byte );
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp );
}
}
else {
$this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp );
}
$this->IMG = 1;
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFAddFooter...
::
*/
private function GIFAddFooter ( ) {
$this->GIF .= ";";
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFBlockCompare...
::
*/
private function GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len ) {
for ( $i = 0; $i < $Len; $i++ ) {
if (
$GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } ||
$GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } ||
$GlobalBlock { 3 * $i + 2 } != $LocalBlock { 3 * $i + 2 }
) {
return ( 0 );
}
}
return ( 1 );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFWord...
::
*/
private function GIFWord ( $int ) {
return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GetAnimation...
::
*/
public function GetAnimation ( ) {
return ( $this->GIF );
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFDecoder Version 2.0 by László Zsidi, http://gifs.hu
::
:: Created at 2007. 02. 01. '07.47.AM'
::
::
::
::
:: Try on-line GIFBuilder Form demo based on GIFDecoder.
::
:: http://gifs.hu/phpclasses/demos/GifBuilder/
::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
*/
Class GIFDecoder {
private $GIF_buffer = Array ( );
private $GIF_arrays = Array ( );
private $GIF_delays = Array ( );
private $GIF_stream = "";
private $GIF_string = "";
private $GIF_bfseek = 0;
private $GIF_screen = Array ( );
private $GIF_global = Array ( );
private $GIF_sorted;
private $GIF_colorS;
private $GIF_colorC;
private $GIF_colorF;
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFDecoder ( $GIF_pointer )
::
*/
public function __construct ( $GIF_pointer ) {
$this->GIF_stream = $GIF_pointer;
$this->GIFGetByte ( 6 ); // GIF89a
$this->GIFGetByte ( 7 ); // Logical Screen Descriptor
$this->GIF_screen = $this->GIF_buffer;
$this->GIF_colorF = $this->GIF_buffer [ 4 ] & 0x80 ? 1 : 0;
$this->GIF_sorted = $this->GIF_buffer [ 4 ] & 0x08 ? 1 : 0;
$this->GIF_colorC = $this->GIF_buffer [ 4 ] & 0x07;
$this->GIF_colorS = 2 << $this->GIF_colorC;
if ( $this->GIF_colorF == 1 ) {
$this->GIFGetByte ( 3 * $this->GIF_colorS );
$this->GIF_global = $this->GIF_buffer;
}
/*
*
* 05.06.2007.
* Made a little modification
*
*
- for ( $cycle = 1; $cycle; ) {
+ if ( GIFDecoder::GIFGetByte ( 1 ) ) {
- switch ( $this->GIF_buffer [ 0 ] ) {
- case 0x21:
- GIFDecoder::GIFReadExtensions ( );
- break;
- case 0x2C:
- GIFDecoder::GIFReadDescriptor ( );
- break;
- case 0x3B:
- $cycle = 0;
- break;
- }
- }
+ else {
+ $cycle = 0;
+ }
- }
*/
for ( $cycle = 1; $cycle; ) {
if ( $this->GIFGetByte ( 1 ) ) {
switch ( $this->GIF_buffer [ 0 ] ) {
case 0x21:
$this->GIFReadExtensions ( );
break;
case 0x2C:
$this->GIFReadDescriptor ( );
break;
case 0x3B:
$cycle = 0;
break;
}
}
else {
$cycle = 0;
}
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFReadExtension ( )
::
*/
private function GIFReadExtensions ( ) {
$this->GIFGetByte ( 1 );
for ( ; ; ) {
$this->GIFGetByte ( 1 );
if ( ( $u = $this->GIF_buffer [ 0 ] ) == 0x00 ) {
break;
}
$this->GIFGetByte ( $u );
/*
* 07.05.2007.
* Implemented a new line for a new function
* to determine the originaly delays between
* frames.
*
*/
if ( $u == 4 ) {
$this->GIF_delays [ ] = ( $this->GIF_buffer [ 1 ] | $this->GIF_buffer [ 2 ] << 8 );
}
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFReadExtension ( )
::
*/
private function GIFReadDescriptor ( ) {
$GIF_screen = Array ( );
$this->GIFGetByte ( 9 );
$GIF_screen = $this->GIF_buffer;
$GIF_colorF = $this->GIF_buffer [ 8 ] & 0x80 ? 1 : 0;
if ( $GIF_colorF ) {
$GIF_code = $this->GIF_buffer [ 8 ] & 0x07;
$GIF_sort = $this->GIF_buffer [ 8 ] & 0x20 ? 1 : 0;
}
else {
$GIF_code = $this->GIF_colorC;
$GIF_sort = $this->GIF_sorted;
}
$GIF_size = 2 << $GIF_code;
$this->GIF_screen [ 4 ] &= 0x70;
$this->GIF_screen [ 4 ] |= 0x80;
$this->GIF_screen [ 4 ] |= $GIF_code;
if ( $GIF_sort ) {
$this->GIF_screen [ 4 ] |= 0x08;
}
$this->GIF_string = "GIF87a";
$this->GIFPutByte ( $this->GIF_screen );
if ( $GIF_colorF == 1 ) {
$this->GIFGetByte ( 3 * $GIF_size );
$this->GIFPutByte ( $this->GIF_buffer );
}
else {
$this->GIFPutByte ( $this->GIF_global );
}
$this->GIF_string .= chr ( 0x2C );
$GIF_screen [ 8 ] &= 0x40;
$this->GIFPutByte ( $GIF_screen );
$this->GIFGetByte ( 1 );
$this->GIFPutByte ( $this->GIF_buffer );
for ( ; ; ) {
$this->GIFGetByte ( 1 );
$this->GIFPutByte ( $this->GIF_buffer );
if ( ( $u = $this->GIF_buffer [ 0 ] ) == 0x00 ) {
break;
}
$this->GIFGetByte ( $u );
$this->GIFPutByte ( $this->GIF_buffer );
}
$this->GIF_string .= chr ( 0x3B );
/*
Add frames into $GIF_stream array...
*/
$this->GIF_arrays [ ] = $this->GIF_string;
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFGetByte ( $len )
::
*/
/*
*
* 05.06.2007.
* Made a little modification
*
*
- function GIFGetByte ( $len ) {
- $this->GIF_buffer = Array ( );
-
- for ( $i = 0; $i < $len; $i++ ) {
+ if ( $this->GIF_bfseek > strlen ( $this->GIF_stream ) ) {
+ return 0;
+ }
- $this->GIF_buffer [ ] = ord ( $this->GIF_stream { $this->GIF_bfseek++ } );
- }
+ return 1;
- }
*/
private function GIFGetByte ( $len ) {
$this->GIF_buffer = Array ( );
for ( $i = 0; $i < $len; $i++ ) {
if ( $this->GIF_bfseek > strlen ( $this->GIF_stream ) ) {
return 0;
}
$this->GIF_buffer [ ] = ord ( $this->GIF_stream { $this->GIF_bfseek++ } );
}
return 1;
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFPutByte ( $bytes )
::
*/
private function GIFPutByte ( $bytes ) {
for ( $i = 0; $i < count ( $bytes ); $i++ ) {
$this->GIF_string .= chr ( $bytes [ $i ] );
}
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: PUBLIC FUNCTIONS
::
::
:: GIFGetFrames ( )
::
*/
public function GIFGetFrames ( ) {
return ( $this->GIF_arrays );
}
/*
:::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: GIFGetDelays ( )
::
*/
public function GIFGetDelays ( ) {
return ( $this->GIF_delays );
}
}
3. [文件]
Imagick.class.php
<?php
namespace YBL;
class Imagick{
/**
* 图像资源对象
* @var resource
*/
private $img;
/**
* 图像信息，包括width,height,type,mime,size
* @var array
*/
private $info;
private $gif_proess;
public $error;
/**
* 构造方法，可用于打开一张图像
* @param string $imgname 图像路径
*/
public function __construct($gif_proess=true) {
$this->gif_proess=$gif_proess;
}
/**
* 打开一张图像
* @param string $imgname 图像路径
*/
public function open($imgname){
//检测图像文件
if(!is_file($imgname)){
$this->error='不存在的图像文件';
return false;
}
//销毁已存在的图像
empty($this->img) || $this->img->destroy();
//载入图像
$this->img = new Imagick(realpath($imgname));
//设置图像信息
$this->info = array(
'width' => $this->img->getImageWidth(),
'height' => $this->img->getImageHeight(),
'type' => strtolower($this->img->getImageFormat()),
'mime' => $this->img->getImageMimeType(),
);
}
/**
* 保存图像
* @param string $imgname 图像保存名称
* @param string $type 图像类型
* @param integer $quality JPEG图像质量
* @param boolean $interlace 是否对JPEG类型图像设置隔行扫描
*/
public function save($imgname, $type = null, $quality=80,$interlace = true){
if(empty($this->img)){
$this->error='没有可以被保存的图像资源';
return false;
}
//设置图片类型
if(is_null($type)){
$type = $this->info['type'];
} else {
$type = strtolower($type);
$this->img->setImageFormat($type);
}
//JPEG图像设置隔行扫描
if('jpeg' == $type || 'jpg' == $type){
$this->img->setImageInterlaceScheme(1);
}
// 设置图像质量
$this->img->setImageCompressionQuality($quality);
//去除图像配置信息
$this->img->stripImage();
//保存图像
$imgname = realpath(dirname($imgname)) . '/' . basename($imgname); //强制绝对路径
if (('gif' == $type)&&$this->gif_proess) {
$this->img->writeImages($imgname, true);
} else {
$this->img->writeImage($imgname);
}
}
/**
* 返回图像宽度
* @return integer 图像宽度
*/
public function width(){
if(empty($this->img)){
$this->error='没有指定图像资源';
return false;
}
return $this->info['width'];
}
/**
* 返回图像高度
* @return integer 图像高度
*/
public function height(){
if(empty($this->img)){
$this->error='没有指定图像资源';
return false;
}
return $this->info['height'];
}
/**
* 返回图像类型
* @return string 图像类型
*/
public function type(){
if(empty($this->img)){
$this->error='没有指定图像资源';
return false;
}
return $this->info['type'];
}
/**
* 返回图像MIME类型
* @return string 图像MIME类型
*/
public function mime(){
if(empty($this->img)){
$this->error='没有指定图像资源';
return false;
}
return $this->info['mime'];
}
/**
* 返回图像尺寸数组 0 - 图像宽度，1 - 图像高度
* @return array 图像尺寸
*/
public function size(){
if(empty($this->img)){
$this->error='没有指定图像资源';
return false;
}
return array($this->info['width'], $this->info['height']);
}
/**
* 裁剪图像
* @param integer $w 裁剪区域宽度
* @param integer $h 裁剪区域高度
* @param integer $x 裁剪区域x坐标
* @param integer $y 裁剪区域y坐标
* @param integer $width 图像保存宽度
* @param integer $height 图像保存高度
*/
public function crop($w, $h, $x = 0, $y = 0, $width = null, $height = null){
if(empty($this->img)){
$this->error='没有可以被裁剪的图像资源';
return false;
}
//设置保存尺寸
empty($width) && $width = $w;
empty($height) && $height = $h;
//裁剪图片
if(('gif' == $this->info['type'])&&$this->gif_proess){
$img = $this->img->coalesceImages();
$this->img->destroy(); //销毁原图
//循环裁剪每一帧
do {
$this->_crop($w, $h, $x, $y, $width, $height, $img);
} while ($img->nextImage());
//压缩图片
$this->img = $img->deconstructImages();
$img->destroy(); //销毁零时图片
} else {
$this->_crop($w, $h, $x, $y, $width, $height);
}
}
/* 裁剪图片，内部调用 */
private function _crop($w, $h, $x, $y, $width, $height, $img = null){
is_null($img) && $img = $this->img;
//裁剪
$info = $this->info;
if($x != 0 || $y != 0 || $w != $info['width'] || $h != $info['height']){
$img->cropImage($w, $h, $x, $y);
$img->setImagePage($w, $h, 0, 0); //调整画布和图片一致
}
//调整大小
if($w != $width || $h != $height){
$img->sampleImage($width, $height);
}
//设置缓存尺寸
$this->info['width'] = $w;
$this->info['height'] = $h;
}
/**
* 生成缩略图
* @param integer $width 缩略图最大宽度
* @param integer $height 缩略图最大高度
* @param integer $type 缩略图裁剪类型
*/
public function thumb($width, $height, $type = Image::IMAGE_THUMB_SCALE){
if(empty($this->img)){
$this->error='没有可以被缩略的图像资源';
return false;
}
//原图宽度和高度
$w = $this->info['width'];
$h = $this->info['height'];
/* 计算缩略图生成的必要参数 */
switch ($type) {
/* 等比例缩放 */
case Image::IMAGE_THUMB_SCALE:
//原图尺寸小于缩略图尺寸则不进行缩略
if($w < $width && $h < $height) return;
//计算缩放比例
$scale = min($width/$w, $height/$h);
//设置缩略图的坐标及宽度和高度
$x = $y = 0;
$width = $w * $scale;
$height = $h * $scale;
break;
/* 居中裁剪 */
case Image::IMAGE_THUMB_CENTER:
//计算缩放比例
$scale = max($width/$w, $height/$h);
//设置缩略图的坐标及宽度和高度
$w = $width/$scale;
$h = $height/$scale;
$x = ($this->info['width'] - $w)/2;
$y = ($this->info['height'] - $h)/2;
break;
/* 左上角裁剪 */
case Image::IMAGE_THUMB_NORTHWEST:
//计算缩放比例
$scale = max($width/$w, $height/$h);
//设置缩略图的坐标及宽度和高度
$x = $y = 0;
$w = $width/$scale;
$h = $height/$scale;
break;
/* 右下角裁剪 */
case Image::IMAGE_THUMB_SOUTHEAST:
//计算缩放比例
$scale = max($width/$w, $height/$h);
//设置缩略图的坐标及宽度和高度
$w = $width/$scale;
$h = $height/$scale;
$x = $this->info['width'] - $w;
$y = $this->info['height'] - $h;
break;
/* 填充 */
case Image::IMAGE_THUMB_FILLED:
//计算缩放比例
if($w < $width && $h < $height){
$scale = 1;
} else {
$scale = min($width/$w, $height/$h);
}
//设置缩略图的坐标及宽度和高度
$neww = $w * $scale;
$newh = $h * $scale;
$posx = ($width - $w * $scale)/2;
$posy = ($height - $h * $scale)/2;
//创建一张新图像
$newimg = new Imagick();
$newimg->newImage($width, $height, 'white', $this->info['type']);
if(('gif' == $this->info['type'])$this->gif_proess){
$imgs = $this->img->coalesceImages();
$img = new Imagick();
$this->img->destroy(); //销毁原图
//循环填充每一帧
do {
//填充图像
$image = $this->_fill($newimg, $posx, $posy, $neww, $newh, $imgs);
$img->addImage($image);
$img->setImageDelay($imgs->getImageDelay());
$img->setImagePage($width, $height, 0, 0);
$image->destroy(); //销毁零时图片
} while ($imgs->nextImage());
//压缩图片
$this->img->destroy();
$this->img = $img->deconstructImages();
$imgs->destroy(); //销毁零时图片
$img->destroy(); //销毁零时图片
} else {
//填充图像
$img = $this->_fill($newimg, $posx, $posy, $neww, $newh);
//销毁原图
$this->img->destroy();
$this->img = $img;
}
//设置新图像属性
$this->info['width'] = $width;
$this->info['height'] = $height;
return;
/* 固定 */
case Image::IMAGE_THUMB_FIXED:
$x = $y = 0;
break;
default:$this->error='不支持的缩略图裁剪类型';
return false;
}
/* 裁剪图像 */
$this->crop($w, $h, $x, $y, $width, $height);
}
/* 填充指定图像，内部使用 */
private function _fill($newimg, $posx, $posy, $neww, $newh, $img = null){
is_null($img) && $img = $this->img;
/* 将指定图片绘入空白图片 */
$draw = new \ImagickDraw();
$draw->composite($img->getImageCompose(), $posx, $posy, $neww, $newh, $img);
$image = $newimg->clone();
$image->drawImage($draw);
$draw->destroy();
return $image;
}
/**
* 添加水印
* @param string $source 水印图片路径
* @param integer $locate 水印位置
* @param integer $alpha 水印透明度
*/
public function water($source, $locate = Image::IMAGE_WATER_SOUTHEAST,$alpha=80){
//资源检测
if(empty($this->img)){$this->error='没有可以被添加水印的图像资源';
return false;}
if(!is_file($source)){
$this->error='水印图像不存在';
return false;
}
//创建水印图像资源
$water = new Imagick(realpath($source));
$info = array($water->getImageWidth(), $water->getImageHeight());
/* 设定水印位置 */
switch ($locate) {
/* 右下角水印 */
case Image::IMAGE_WATER_SOUTHEAST:
$x = $this->info['width'] - $info[0];
$y = $this->info['height'] - $info[1];
break;
/* 左下角水印 */
case Image::IMAGE_WATER_SOUTHWEST:
$x = 0;
$y = $this->info['height'] - $info[1];
break;
/* 左上角水印 */
case Image::IMAGE_WATER_NORTHWEST:
$x = $y = 0;
break;
/* 右上角水印 */
case Image::IMAGE_WATER_NORTHEAST:
$x = $this->info['width'] - $info[0];
$y = 0;
break;
/* 居中水印 */
case Image::IMAGE_WATER_CENTER:
$x = ($this->info['width'] - $info[0])/2;
$y = ($this->info['height'] - $info[1])/2;
break;
/* 下居中水印 */
case Image::IMAGE_WATER_SOUTH:
$x = ($this->info['width'] - $info[0])/2;
$y = $this->info['height'] - $info[1];
break;
/* 右居中水印 */
case Image::IMAGE_WATER_EAST:
$x = $this->info['width'] - $info[0];
$y = ($this->info['height'] - $info[1])/2;
break;
/* 上居中水印 */
case Image::IMAGE_WATER_NORTH:
$x = ($this->info['width'] - $info[0])/2;
$y = 0;
break;
/* 左居中水印 */
case Image::IMAGE_WATER_WEST:
$x = 0;
$y = ($this->info['height'] - $info[1])/2;
break;
default:
/* 自定义水印坐标 */
if(is_array($locate)){
list($x, $y) = $locate;
} else {
$this->error='不支持的水印位置类型';
return false;
}
}
//创建绘图资源
$draw = new \ImagickDraw();
$draw->composite($water->getImageCompose(), $x, $y, $info[0], $info[1], $water);
if(('gif' == $this->info['type'])&&$this->gif_proess){
$img = $this->img->coalesceImages();
$this->img->destroy(); //销毁原图
do{
//添加水印
$img->drawImage($draw);
} while ($img->nextImage());
//压缩图片
$this->img = $img->deconstructImages();
$img->destroy(); //销毁零时图片
} else {
//添加水印
$this->img->drawImage($draw);
}
//销毁水印资源
$draw->destroy();
$water->destroy();
}
/**
* 图像添加文字
* @param string $text 添加的文字
* @param string $font 字体路径
* @param integer $size 字号
* @param string $color 文字颜色
* @param integer $locate 文字写入位置
* @param integer $offset 文字相对当前位置的偏移量
* @param integer $angle 文字倾斜角度
*/
public function text($text, $font, $size, $color = '#00000000',
$locate = Image::IMAGE_WATER_SOUTHEAST, $offset = 0, $angle = 0){
//资源检测
if(empty($this->img)){$this->error='没有可以被写入文字的图像资源';
return false;}
if(!is_file($font)){
$this->error="不存在的字体文件：{$font}";
return false;
}
//获取颜色和透明度
if(is_array($color)){
$color = array_map('dechex', $color);
foreach ($color as &$value) {
$value = str_pad($value, 2, '0', STR_PAD_LEFT);
}
$color = '#' . implode('', $color);
} elseif(!is_string($color) || 0 !== strpos($color, '#')) {
$this->error='错误的颜色值';
return false;
}
$col = substr($color, 0, 7);
$alp = strlen($color) == 9 ? substr($color, -2) : 0;
//获取文字信息
$draw = new \ImagickDraw();
$draw->setFont(realpath($font));
$draw->setFontSize($size);
$draw->setFillColor($col);
$draw->setFillAlpha(1-hexdec($alp)/127);
$draw->setTextAntialias(true);
$draw->setStrokeAntialias(true);
$metrics = $this->img->queryFontMetrics($draw, $text);
/* 计算文字初始坐标和尺寸 */
$x = 0;
$y = $metrics['ascender'];
$w = $metrics['textWidth'];
$h = $metrics['textHeight'];
/* 设定文字位置 */
switch ($locate) {
/* 右下角文字 */
case Image::IMAGE_WATER_SOUTHEAST:
$x += $this->info['width'] - $w;
$y += $this->info['height'] - $h;
break;
/* 左下角文字 */
case Image::IMAGE_WATER_SOUTHWEST:
$y += $this->info['height'] - $h;
break;
/* 左上角文字 */
case Image::IMAGE_WATER_NORTHWEST:
// 起始坐标即为左上角坐标，无需调整
break;
/* 右上角文字 */
case Image::IMAGE_WATER_NORTHEAST:
$x += $this->info['width'] - $w;
break;
/* 居中文字 */
case Image::IMAGE_WATER_CENTER:
$x += ($this->info['width'] - $w)/2;
$y += ($this->info['height'] - $h)/2;
break;
/* 下居中文字 */
case Image::IMAGE_WATER_SOUTH:
$x += ($this->info['width'] - $w)/2;
$y += $this->info['height'] - $h;
break;
/* 右居中文字 */
case Image::IMAGE_WATER_EAST:
$x += $this->info['width'] - $w;
$y += ($this->info['height'] - $h)/2;
break;
/* 上居中文字 */
case Image::IMAGE_WATER_NORTH:
$x += ($this->info['width'] - $w)/2;
break;
/* 左居中文字 */
case Image::IMAGE_WATER_WEST:
$y += ($this->info['height'] - $h)/2;
break;
default:
/* 自定义文字坐标 */
if(is_array($locate)){
list($posx, $posy) = $locate;
$x += $posx;
$y += $posy;
} else {
$this->error='不支持的文字位置类型';
return false;
}
}
/* 设置偏移量 */
if(is_array($offset)){
$offset = array_map('intval', $offset);
list($ox, $oy) = $offset;
} else{
$offset = intval($offset);
$ox = $oy = $offset;
}
/* 写入文字 */
if(('gif' == $this->info['type'])&&$this->gif_proess){
$img = $this->img->coalesceImages();
$this->img->destroy(); //销毁原图
do{
$img->annotateImage($draw, $x + $ox, $y + $oy, $angle, $text);
} while ($img->nextImage());
//压缩图片
$this->img = $img->deconstructImages();
$img->destroy(); //销毁零时图片
} else {
$this->img->annotateImage($draw, $x + $ox, $y + $oy, $angle, $text);
}
$draw->destroy();
}
/**
* 析构方法，用于销毁图像资源
*/
public function __destruct() {
empty($this->img) || $this->img->destroy();
}
}
4. [文件] image.php
<?php
namespace YBL;
set_time_limit(0);
require_once('../lib/image/Image.class.php');
$source='image/ybl.gif';
$image=new image(1);
//========================================================================
//打开一幅图像
$image->open($source);
echo '图片宽度:'.$image->width(),'<br/>';
echo '图片高度:'.$image->height(),'<br/>';
echo '图片类型:'.$image->type(),'<br/>';
echo '图像MIME类型:'.$image->mime(),'<br/>';
$size=$image->size();
echo '图片宽度:'.$size[0],'<br/>';
echo '图片高度:'.$size[1],'<br/>';
$savename='image/save.gif';
//保存图片
//参数 图片保存地址,图片类型,图像质量,是否对JPEG类型图片设置隔行扫描
$image->save($savename);
$wh=2;
//======================================================================
//生成缩略图
//参数 缩略图最大宽度,缩略图最大高度,缩略图裁剪类型
$image->thumb($size[0]*$wh,$size[1]*$wh,5);
$savename='image/thumb.gif';
$image->save($savename);
//=================================================================================
//图像添加文字
$text='你好!!!文字';
//字体类型
$fonturl='image/simhei.ttf';
//字体大小
$fontsize='20';
//字体颜色
$fontcolor='#FFF';
//字体倾斜度
$fontxdu=20;
//参数 添加的文字,字体路径,字号,文字颜色,文字写入位置,文字相对当前位置的偏移量,文字倾斜角度
$image->text($text,$fonturl,$fontsize,$fontcolor,array(100,100),0,$fontxdu);
$savename='image/text.gif';
$image->save($savename);
//=================================================================================
//打水印
$alpha=80;
$water='image/water.png';
//数组表示 水印位置
//数字 水印位置类型
$xy=array(120,20);
//参数 水印图片路径,水印位置,水印透明度
$image->water($water,$xy,$alpha);
$savename='image/water_aim.gif';
$image->save($savename);
//=================================================================================
//裁剪图像
//参数 裁剪区域宽度,裁剪区域高度,裁剪区域x坐标,裁剪区域y坐标,图片保存宽度,图片保存高度
$image->crop(100,100,100,100);
$savename='image/crop.gif';
$image->save($savename); 下一篇： 什么是jsp自定义标签?