PHP 图片处理
<!-- 非常强大的php图片处理类，可以自定义图片水印、透明度、图片缩放、图片锐化、图片旋转、图片翻转、图片剪切、图片反色。
* 图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色
* 处理并保存历史记录的思路：当有图片有改动时自动生成一张新图片，命名方式可以考虑在原图片的基础上加上步骤，例如：图片名称+__第几步 -->
<?php
namespace app\common\utils;
/**
* Created by : PhpStorm
* User: Chen
* Date: 2022/8/22
* Time: 9:47
*/
class picture
{
public $PICTURE_URL; //要处理的图片
public $DEST_URL = "temp__01.jpg"; //生成目标图片位置
public $PICTURE_CREATE; //要创建的图片
public $TURE_COLOR; //新建一个真彩图象
public $PICTURE_WIDTH; //原图片宽度
public $PICTURE_HEIGHT; //原图片高度
/**
* 水印的类型，默认的为水印文字
*/
public $MARK_TYPE = 1;
public $WORD; //经过UTF-8后的文字
public $WORD_X; //文字横坐标
public $WORD_Y; //文字纵坐标
public $FONT_TYPE; //字体类型
public $FONT_SIZE = "12"; //字体大小
public $FONT_WORD; //文字
public $ANGLE = 0; //文字的角度，默认为0
public $FONT_COLOR = "#000000"; //文字颜色
public $FONT_PATH = "font/simkai.ttf"; //字体库，默认为宋体
public $FORCE_URL; //水印图片
public $FORCE_X = 0; //水印横坐标
public $FORCE_Y = 0; //水印纵坐标
public $FORCE_START_X = 0; //切起水印的图片横坐标
public $FORCE_START_Y = 0; //切起水印的图片纵坐标
public $PICTURE_TYPE; //图片类型
public $PICTURE_MIME; //输出的头部
/**
* 缩放比例为1的话就按缩放高度和宽度缩放
*/
public $ZOOM = 1; //缩放类型
public $ZOOM_MULTIPLE; //缩放比例
public $ZOOM_WIDTH; //缩放宽度
public $ZOOM_HEIGHT; //缩放高度
/**
* 裁切，按比例和固定长度、宽度
*/
public $CUT_TYPE = 1; //裁切类型
public $CUT_X = 0; //裁切的横坐标
public $CUT_Y = 0; //裁切的纵坐标
public $CUT_WIDTH = 100; //裁切的宽度
public $CUT_HEIGHT = 100; //裁切的高度
/**
* 锐化
*/
public $SHARP = "7.0"; //锐化程度
/**
* 透明度处理
*/
public $ALPHA = '100'; //透明度在0-127之间
public $ALPHA_X = "90";
public $ALPHA_Y = "50";
/**
* 任意角度旋转
*/
public $CIRCUMROTATE = "90.0"; //注意，必须为浮点数
/**
* 出错信息
*/
public $ERROR = array(
'unalviable' => '没有找到相关图片!'
);
/**
* 构造函数：函数初始化
*/
function __construct($PICTURE_URL)
{
$this->get_info($PICTURE_URL);
}
function get_info($PICTURE_URL)
{
/**
* 处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息
*/
@$SIZE = getimagesize($PICTURE_URL);
if (!$SIZE) {
exit($this->ERROR['unalviable']);
}
// 得到原图片的信息类型、宽度、高度
$this->PICTURE_MIME = $SIZE['mime'];
$this->PICTURE_WIDTH = $SIZE[0];
$this->PICTURE_HEIGHT = $SIZE[1];
// 创建图片
switch ($SIZE[2]) {
case 1:
$this->PICTURE_CREATE = imagecreatefromgif($PICTURE_URL);
$this->PICTURE_TYPE = "imagejpeg";
$this->PICTURE_EXT = "jpg";
break;
case 2:
$this->PICTURE_CREATE = imagecreatefromjpeg($PICTURE_URL);
$this->PICTURE_TYPE = "imagegif";
$this->PICTURE_EXT = "gif";
break;
case 3:
$this->PICTURE_CREATE = imagecreatefrompng($PICTURE_URL);
$this->PICTURE_TYPE = "imagepng";
$this->PICTURE_EXT = "png";
break;
}
/**
* 文字颜色转换16进制转换成10进制
*/
preg_match_all("/([0-f]){2,2}/i", $this->FONT_COLOR, $MATCHES);
if (count($MATCHES) == 3) {
$this->RED = hexdec($MATCHES[0][0]);
$this->GREEN = hexdec($MATCHES[0][1]);
$this->BLUE = hexdec($MATCHES[0][2]);
}
}
# end of __construct
/**
* 将16进制的颜色转换成10进制的（R，G，B）
*/
function hex2dec()
{
preg_match_all("/([0-f]){2,2}/i", $this->FONT_COLOR, $MATCHES);
if (count($MATCHES) == 3) {
$this->RED = hexdec($MATCHES[0][0]);
$this->GREEN = hexdec($MATCHES[0][1]);
$this->BLUE = hexdec($MATCHES[0][2]);
}
}
// 缩放类型
function zoom_type($ZOOM_TYPE)
{
$this->ZOOM = $ZOOM_TYPE;
}
// 对图片进行缩放,如果不指定高度和宽度就进行缩放
function zoom()
{
// 缩放的大小
if ($this->ZOOM == 0) {
$this->ZOOM_WIDTH = $this->PICTURE_WIDTH * $this->ZOOM_MULTIPLE;
$this->ZOOM_HEIGHT = $this->PICTURE_HEIGHT * $this->ZOOM_MULTIPLE;
}
// 新建一个真彩图象
$this->TRUE_COLOR = imagecreatetruecolor($this->ZOOM_WIDTH, $this->ZOOM_HEIGHT);
$WHITE = imagecolorallocate($this->TRUE_COLOR, 255, 255, 255);
imagefilledrectangle($this->TRUE_COLOR, 0, 0, $this->ZOOM_WIDTH, $this->ZOOM_HEIGHT, $WHITE);
imagecopyresized($this->TRUE_COLOR, $this->PICTURE_CREATE, 0, 0, 0, 0, $this->ZOOM_WIDTH, $this->ZOOM_HEIGHT, $this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
}
# end of zoom
// 裁切图片,按坐标或自动
function cut()
{
$this->TRUE_COLOR = imagecreatetruecolor($this->CUT_WIDTH, $this->CUT_WIDTH);
imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, 0, 0, $this->CUT_X, $this->CUT_Y, $this->CUT_WIDTH, $this->CUT_HEIGHT);
}
# end of cut
/**
* 在图片上放文字或图片
* 水印文字
*/
function _mark_text()
{
$this->TRUE_COLOR = imagecreatetruecolor($this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
$this->WORD = mb_convert_encoding($this->FONT_WORD, 'utf-8', 'gb2312');
/**
* 取得使用 TrueType 字体的文本的范围
*/
$TEMP = imagettfbbox($this->FONT_SIZE, 0, $this->FONT_PATH, $this->WORD);
$WORD_LENGTH = strlen($this->WORD);
$WORD_WIDTH = $TEMP[2] - $TEMP[6];
$WORD_HEIGHT = $TEMP[3] - $TEMP[7];
/**
* 文字水印的默认位置为右下角
*/
if ($this->WORD_X == "") {
$this->WORD_X = $this->PICTURE_WIDTH - $WORD_WIDTH;
}
if ($this->WORD_Y == "") {
$this->WORD_Y = $this->PICTURE_HEIGHT - $WORD_HEIGHT;
}
imagesettile($this->TRUE_COLOR, $this->PICTURE_CREATE);
imagefilledrectangle($this->TRUE_COLOR, 0, 0, $this->PICTURE_WIDTH, $this->PICTURE_HEIGHT, IMG_COLOR_TILED);
$TEXT2 = imagecolorallocate($this->TRUE_COLOR, $this->RED, $this->GREEN, $this->Blue);
imagettftext($this->TRUE_COLOR, $this->FONT_SIZE, $this->ANGLE, $this->WORD_X, $this->WORD_Y, $TEXT2, $this->FONT_PATH, $this->WORD);
}
/**
* 水印图片
*/
function _mark_picture()
{
/**
* 获取水印图片的信息
*/
@$SIZE = getimagesize($this->FORCE_URL);
if (!$SIZE) {
exit($this->ERROR['unalviable']);
}
$FORCE_PICTURE_WIDTH = $SIZE[0];
$FORCE_PICTURE_HEIGHT = $SIZE[1];
// 创建水印图片
switch ($SIZE[2]) {
case 1:
$FORCE_PICTURE_CREATE = imagecreatefromgif($this->FORCE_URL);
$FORCE_PICTURE_TYPE = "gif";
break;
case 2:
$FORCE_PICTURE_CREATE = imagecreatefromjpeg($this->FORCE_URL);
$FORCE_PICTURE_TYPE = "jpg";
break;
case 3:
$FORCE_PICTURE_CREATE = imagecreatefrompng($this->FORCE_URL);
$FORCE_PICTURE_TYPE = "png";
break;
}
/**
* 判断水印图片的大小，并生成目标图片的大小，如果水印比图片大，则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。
*/
$this->NEW_PICTURE = $this->PICTURE_CREATE;
if ($FORCE_PICTURE_WIDTH > $this->PICTURE_WIDTH) {
$CREATE_WIDTH = $FORCE_PICTURE_WIDTH - $this->FORCE_START_X;
} else {
$CREATE_WIDTH = $this->PICTURE_WIDTH;
}
if ($FORCE_PICTURE_HEIGHT > $this->PICTURE_HEIGHT) {
$CREATE_HEIGHT = $FORCE_PICTURE_HEIGHT - $this->FORCE_START_Y;
} else {
$CREATE_HEIGHT = $this->PICTURE_HEIGHT;
}
/**
* 创建一个画布
*/
$NEW_PICTURE_CREATE = imagecreatetruecolor($CREATE_WIDTH, $CREATE_HEIGHT);
$WHITE = imagecolorallocate($NEW_PICTURE_CREATE, 255, 255, 255);
/**
* 将背景图拷贝到画布中
*/
imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0, $this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
/**
* 将目标图片拷贝到背景图片上
*/
imagecopy($NEW_PICTURE_CREATE, $FORCE_PICTURE_CREATE, $this->FORCE_X, $this->FORCE_Y, $this->FORCE_START_X, $this->FORCE_START_Y, $FORCE_PICTURE_WIDTH, $FORCE_PICTURE_HEIGHT);
$this->TRUE_COLOR = $NEW_PICTURE_CREATE;
}
# end of mark
function alpha_()
{
$this->TRUE_COLOR = imagecreatetruecolor($this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
$rgb = "#CDCDCD";
$tran_color = "#000000";
for ($j = 0; $j <= $this->PICTURE_HEIGHT - 1; $j++) {
for ($i = 0; $i <= $this->PICTURE_WIDTH - 1; $i++) {
$rgb = imagecolorat($this->PICTURE_CREATE, $i, $j);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;
$now_color = imagecolorallocate($this->PICTURE_CREATE, $r, $g, $b);
if ($now_color == $tran_color) {
continue;
} else {
// $color = imagecolorallocatealpha($this -> PICTURE_CREATE, $r, $g, $b, $ALPHA);
// imagesetpixel($this -> PICTURE_CREATE, $ALPHA_X + $i, $ALPHA_Y + $j, $color);
$color = imagecolorallocatealpha($this->PICTURE_CREATE, $r, $g, $b, $this->ALPHA);
imagesetpixel($this->PICTURE_CREATE, $this->ALPHA_X + $i, $this->ALPHA_Y + $j, $color);
}
$this->TRUE_COLOR = $this->PICTURE_CREATE;
}
}
}
/**
* 图片旋转:
* 沿y轴旋转
*/
function turn_y()
{
$this->TRUE_COLOR = imagecreatetruecolor($this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
for ($x = 0; $x < $this->PICTURE_WIDTH; $x++) {
imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, $this->PICTURE_WIDTH - $x - 1, 0, $x, 0, 1, $this->PICTURE_HEIGHT);
}
}
/**
* 沿X轴旋转
*/
function turn_x()
{
$this->TRUE_COLOR = imagecreatetruecolor($this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
for ($y = 0; $y < $this->PICTURE_HEIGHT; $y++) {
imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, 0, $this->PICTURE_HEIGHT - $y - 1, 0, $y, $this->PICTURE_WIDTH, 1);
}
}
/**
* 任意角度旋转
*/
function turn()
{
$this->TRUE_COLOR = imagecreatetruecolor($this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
imageCopyResized($this->TRUE_COLOR, $this->PICTURE_CREATE, 0, 0, 0, 0, $this->PICTURE_WIDTH, $this->PICTURE_HEIGHT, $this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
$WHITE = imagecolorallocate($this->TRUE_COLOR, 255, 255, 255);
$this->TRUE_COLOR = imagerotate($this->TRUE_COLOR, $this->CIRCUMROTATE, $WHITE);
}
/**
* 图片锐化
*/
function sharp()
{
$this->TRUE_COLOR = imagecreatetruecolor($this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
$cnt = 0;
for ($x = 0; $x < $this->PICTURE_WIDTH; $x++) {
for ($y = 0; $y < $this->PICTURE_HEIGHT; $y++) {
$src_clr1 = imagecolorsforindex($this->TRUE_COLOR, imagecolorat($this->PICTURE_CREATE, $x - 1, $y - 1));
$src_clr2 = imagecolorsforindex($this->TRUE_COLOR, imagecolorat($this->PICTURE_CREATE, $x, $y));
$r = intval($src_clr2["red"] + $this->SHARP * ($src_clr2["red"] - $src_clr1["red"]));
$g = intval($src_clr2["green"] + $this->SHARP * ($src_clr2["green"] - $src_clr1["green"]));
$b = intval($src_clr2["blue"] + $this->SHARP * ($src_clr2["blue"] - $src_clr1["blue"]));
$r = min(255, max($r, 0));
$g = min(255, max($g, 0));
$b = min(255, max($b, 0));
if (($DST_CLR = imagecolorexact($this->PICTURE_CREATE, $r, $g, $b)) == -1)
$DST_CLR = imagecolorallocate($this->PICTURE_CREATE, $r, $g, $b);
$cnt++;
if ($DST_CLR == -1) die("color allocate faile at $x, $y ($cnt).");
imagesetpixel($this->TRUE_COLOR, $x, $y, $DST_CLR);
}
}
}
/**
* 将图片反色处理??
*/
function return_color()
{
/**
* 创建一个画布
*/
$NEW_PICTURE_CREATE = imagecreate($this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
$WHITE = imagecolorallocate($NEW_PICTURE_CREATE, 255, 255, 255);
/**
* 将背景图拷贝到画布中
*/
imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0, $this->PICTURE_WIDTH, $this->PICTURE_HEIGHT);
$this->TRUE_COLOR = $NEW_PICTURE_CREATE;
}
/**
* 生成目标图片并显示
*/
function show()
{
// 判断浏览器,若是IE就不发送头
if (isset($_SERVER['HTTP_USER_AGENT'])) {
$ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
if (!preg_match('/^.*MSIE.*\)$/i', $ua)) {
header("Content-type:$this->PICTURE_MIME");
}
}
$OUT = $this->PICTURE_TYPE;
$OUT($this->TRUE_COLOR);
}
/**
* 生成目标图片并保存
*/
function save_picture()
{
// 以 JPEG 格式将图像输出到浏览器或文件
$OUT = $this->PICTURE_TYPE;
if (function_exists($OUT)) {
// 判断浏览器,若是IE就不发送头
if (isset($_SERVER['HTTP_USER_AGENT'])) {
$ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
if (!preg_match('/^.*MSIE.*\)$/i', $ua)) {
header("Content-type:$this->PICTURE_MIME");
}
}
if (!$this->TRUE_COLOR) {
exit($this->ERROR['unavilable']);
} else {
$OUT($this->TRUE_COLOR, $this->DEST_URL);
$OUT($this->TRUE_COLOR);
}
}
}
/**
* 析构函数：释放图片
*/
function __destruct()
{
/**
* 释放图片
*/
imagedestroy($this->TRUE_COLOR);
imagedestroy($this->PICTURE_CREATE);
}
# end of class
}
本作品采用 知识共享署名-相同方式共享 4.0 国际许可协议 进行许可。
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