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imageClass.php
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270 lines (231 loc) · 7.87 KB
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<?php
/**
* 图片处理类
* @authors Andy Chen (bootoo@sina.cn)
* @date 2014-03-12 21:16:12
* @version $Id$
*/
class imageClass {
function __construct(){
$this->fontfile = 'XHei.ttc';
}
/**
* 验证码图片生成方法
* @param int $speck_num 画多少个点
* @param int $line_num 画多少条线
* @param int $font_num 填充文字数量
* @return img $im
*/
public function verification($speck_num,$line_num,$font_num){
$_SESSION['ver_code'] = '';
$im = imagecreatetruecolor(100, 30); //画布
$text = '23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ'; //填充内容(已经去除10lo)
// 随机背景颜色
$red = mt_rand(110,130);
$green = mt_rand(110,130);
$blue = mt_rand(110,130);
$back_color = imagecolorallocate($im, $red, $green, $blue); //背景颜色
$border_color = imagecolorallocate($im, 0, 114, 198); //边框颜色
imagefilledrectangle($im,0,0,100,30,$back_color); //画背景
imagerectangle($im, 0, 0, 100, 30, $border_color); //边框
// 随机生成点
for ($i=0; $i < $speck_num; $i++) {
$red = mt_rand(0,255);
$green = mt_rand(0,255);
$blue = mt_rand(0,255);
$x = mt_rand(0,100);
$y = mt_rand(0,30);
$speck_color = imagecolorallocate($im, $red, $green, $blue); //点(speck:杂点，污点)颜色
imagesetpixel($im, $x, $y, $speck_color); //画点
}
// 随机生成线
for ($i=0; $i < $line_num; $i++) {
$red = mt_rand(0,255);
$green = mt_rand(0,255);
$blue = mt_rand(0,255);
$cx = mt_rand(0,100);
$cy = mt_rand(0,30);
$width = mt_rand(0,90);
$height = mt_rand(0,90);
$start = mt_rand(0,360);
$end = mt_rand(0,360);
$line_color = imagecolorallocate($im, $red, $green, $blue); //线条颜色
imagearc($im, $cx, $cy, $width, $height, $start, $end, $line_color); //画线
}
// 随机生成文字
$fonts = '';
for ($i=1; $i <= $font_num; $i++) {
$red = mt_rand(0,255);
$green = mt_rand(0,255);
$blue = mt_rand(0,255);
$size = mt_rand(20,26);
$angle = mt_rand(0,26);
$x = 15*$i;
$y = mt_rand(25,30);
$font = '';
$start = mt_rand(0,(strlen($text)-1));
$font = substr($text, $start,1);
$font_color = imagecolorallocate($im, 0, 0, 0); //字体颜色
imagefttext($im, $size, $angle, $x, $y, $font_color, $this->fontfile, $font); //填充文字
$fonts .= $font;
}
$_SESSION['ver_code'] = $fonts;
return $im;
}
/**
* 图片缩放方法
* @param str $file 图片路径
* @param str $newFile 要生成的新文件名和路径
* @param int $width 要缩放的宽度
* @param int $height 要缩放的高度
* @return str $newFile 缩放后的图片路径
*/
public function thumb($file,$newFile,$width,$height){
$old_img = imagecreatefromjpeg($file);
// 得到图片的原宽高
$old_width = imagesx($old_img);
$old_height = imagesy($old_img);
// 原图比例
$ratio = $old_width/$old_height;
// 宽够，高够
if ($old_width >= $width and $old_height >= $height) {
if ($width > $height) {
$new_width = $width;
$new_height = $width/$ratio;
} elseif($width < $height) {
$new_width = $height*$ratio;
$new_height = $height;
}else{
if ($ratio >= 1) {
$new_width = $height*$ratio;
$new_height = $height;
} else {
$new_width = $width;
$new_height = $width/$ratio;
}
}
if ($ratio >= 1) {
$nx = -(($new_width/2) - ($width/2));
$ny = 0;
} else {
$nx = ($width/2) - ($new_width/2);
$ny = -(($new_height/2) - ($height/2));
}
}
// 宽够，高不够
if ($old_width >= $width and $old_height < $height) {
$new_width = $width;
$new_height = $width/$ratio;
$nx = 0;
$ny = ($height/2) - ($new_height/2);
}
// 宽不够，高够
if ($old_width < $width and $old_height >= $height) {
$new_width = $height*$ratio;
$new_height = $height;
$nx = ($width/2) - ($new_width/2);
$ny = 0;
}
// 宽不够，高不够
if ($old_width < $width and $old_height < $height) {
$new_width = $old_width;
$new_height = $old_height;
$nx = ($width/2) - ($new_width/2);
$ny = ($height/2) - ($new_height/2);
}
//原图坐标
$ox = 0;
$oy = 0;
//生成新图片
$new_img = imagecreatetruecolor($width,$height);
$back_color = imagecolorallocate($new_img, 255, 255, 255); //新图片背景颜色
imagefilledrectangle($new_img,0,0,$width,$height,$back_color); //新图片背景
//创建新的图像对象(缩略图)
imagecopyresized($new_img,$old_img,$nx,$ny,$ox,$oy, $new_width,$new_height,$old_width,$old_height);
// 生成图片
imagejpeg($new_img,$newFile);
// 销毁图片
imagedestroy($new_img);
return $newFile;
}
/**
* 图片加水印方法
* @param arr $img_path 原图信息
* @param str/arr $wt_con 水印内容
* @param str $seat 水印位置 1.up_l(上左) 2.up_r(上右) 3.do_l(下左) 4.do_r(下右)
* @param arr $gap 边距 (width=>侧边距离，height=>底部距离/顶部距离)
* @param int $alpha 透明度
*/
public function waterMark($img_path,$wt_con,$seat,$gap,$alpha=''){
$old_path = $img_path;
// 得到原图
$old_img = imagecreatefromjpeg($old_path);
$old_info = getimagesize($old_path);
// 得到水印信息(区分图片或文字)
if (is_array($wt_con)) {
$font = imagettfbbox($wt_con['size'], 0, $this->fontfile, $wt_con['text']);
$wt_info['0'] = $font[4] - $font[6];
$wt_info['1'] = $font[1] - $font[7];
} else {
$wt_img = imagecreatefrompng($wt_con);
$wt_info = getimagesize($wt_con);
}
// 计算水印位置
$water_seat = $this->wmGap($old_info,$wt_info,$seat,$gap);
// 打水印(区分图片或文字)
if (is_array($wt_con)) {
$font_color = imagecolorallocate($old_img, 234, 234, 234);
// 下面的$water_seat['gap_h']+20 因 imagettfbbox() 坐标系统和其他的统一所致
imagettftext($old_img, $wt_con['size'], 0, $water_seat['gap_w'], $water_seat['gap_h']+20, $font_color, $this->fontfile, $wt_con['text']);
} else {
if ($alpha == '') {
imagecopy($old_img, $wt_img, $water_seat['gap_w'], $water_seat['gap_h'], 0, 0, $wt_info['0'], $wt_info['1']); //无背景，不可透明
} else {
imagecopymerge($old_img, $wt_img, $water_seat['gap_w'], $water_seat['gap_h'], 0, 0, $wt_info['0'], $wt_info['1'], $alpha); //有背景，可透明
}
}
// 生成加水印后的图片
imagepng($old_img,$old_path);
// 销毁图片
imagedestroy($old_img);
imagedestroy($wt_img);
}
/**
* 计算水印位置
* @param arr $old_info 原图信息
* @param arr $wt_info 水印图信息
* @param str $seat 位置
* @param int $gap 边距
* @return arr $arr 处理好的数组
*/
public function wmGap($old_info,$wt_info,$seat,$gap){
switch ($seat) {
case 'up_l':
$arr['gap_w'] = $gap['0'];
$arr['gap_h'] = $gap['1'];
break;
case 'up_r':
$width = $old_info['0'] - $wt_info['0'] - $gap['0'];
$arr['gap_w'] = $width;
$arr['gap_h'] = $gap['1'];
break;
case 'do_l':
$height = $old_info['1'] - $wt_info['1'] - $gap['1'];
$arr['gap_w'] = $gap['0'];
$arr['gap_h'] = $height;
break;
case 'do_r':
$width = $old_info['0'] - $wt_info['0'] - $gap['0'];
$height = $old_info['1'] - $wt_info['1'] - $gap['1'];
$arr['gap_w'] = $width;
$arr['gap_h'] = $height;
break;
default:
$arr['gap_w'] = $gap['0'];
$arr['gap_h'] = $gap['1'];
break;
}
return $arr;
}
}
?>