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);