611 lines
20 KiB
PHP
611 lines
20 KiB
PHP
<?php
|
||
// +----------------------------------------------------------------------
|
||
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
|
||
// +----------------------------------------------------------------------
|
||
// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
|
||
// +----------------------------------------------------------------------
|
||
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
|
||
// +----------------------------------------------------------------------
|
||
// | Author: yunwuxin <448901948@qq.com>
|
||
// +----------------------------------------------------------------------
|
||
|
||
namespace think;
|
||
|
||
use think\image\Exception as ImageException;
|
||
use think\image\gif\Gif;
|
||
|
||
class Image
|
||
{
|
||
|
||
/* 缩略图相关常量定义 */
|
||
const THUMB_SCALING = 1; //常量，标识缩略图等比例缩放类型
|
||
const THUMB_FILLED = 2; //常量，标识缩略图缩放后填充类型
|
||
const THUMB_CENTER = 3; //常量，标识缩略图居中裁剪类型
|
||
const THUMB_NORTHWEST = 4; //常量，标识缩略图左上角裁剪类型
|
||
const THUMB_SOUTHEAST = 5; //常量，标识缩略图右下角裁剪类型
|
||
const THUMB_FIXED = 6; //常量，标识缩略图固定尺寸缩放类型
|
||
/* 水印相关常量定义 */
|
||
const WATER_NORTHWEST = 1; //常量，标识左上角水印
|
||
const WATER_NORTH = 2; //常量，标识上居中水印
|
||
const WATER_NORTHEAST = 3; //常量，标识右上角水印
|
||
const WATER_WEST = 4; //常量，标识左居中水印
|
||
const WATER_CENTER = 5; //常量，标识居中水印
|
||
const WATER_EAST = 6; //常量，标识右居中水印
|
||
const WATER_SOUTHWEST = 7; //常量，标识左下角水印
|
||
const WATER_SOUTH = 8; //常量，标识下居中水印
|
||
const WATER_SOUTHEAST = 9; //常量，标识右下角水印
|
||
/* 翻转相关常量定义 */
|
||
const FLIP_X = 1; //X轴翻转
|
||
const FLIP_Y = 2; //Y轴翻转
|
||
|
||
/**
|
||
* 图像资源对象
|
||
*
|
||
* @var resource
|
||
*/
|
||
protected $im;
|
||
|
||
/** @var Gif */
|
||
protected $gif;
|
||
|
||
/**
|
||
* 图像信息，包括 width, height, type, mime, size
|
||
*
|
||
* @var array
|
||
*/
|
||
protected $info;
|
||
|
||
protected function __construct(\SplFileInfo $file)
|
||
{
|
||
//获取图像信息
|
||
$info = @getimagesize($file->getPathname());
|
||
|
||
//检测图像合法性
|
||
if (false === $info || (IMAGETYPE_GIF === $info[2] && empty($info['bits']))) {
|
||
throw new ImageException('Illegal image file');
|
||
}
|
||
|
||
//设置图像信息
|
||
$this->info = [
|
||
'width' => $info[0],
|
||
'height' => $info[1],
|
||
'type' => image_type_to_extension($info[2], false),
|
||
'mime' => $info['mime'],
|
||
];
|
||
|
||
//打开图像
|
||
if ('gif' == $this->info['type']) {
|
||
$this->gif = new Gif($file->getPathname());
|
||
$this->im = @imagecreatefromstring($this->gif->image());
|
||
} else {
|
||
$fun = "imagecreatefrom{$this->info['type']}";
|
||
$this->im = @$fun($file->getPathname());
|
||
}
|
||
|
||
if (empty($this->im)) {
|
||
throw new ImageException('Failed to create image resources!');
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 打开一个图片文件
|
||
* @param \SplFileInfo|string $file
|
||
* @return Image
|
||
*/
|
||
public static function open($file)
|
||
{
|
||
if (is_string($file)) {
|
||
$file = new \SplFileInfo($file);
|
||
}
|
||
if (!$file->isFile()) {
|
||
throw new ImageException('image file not exist');
|
||
}
|
||
return new self($file);
|
||
}
|
||
|
||
/**
|
||
* 保存图像
|
||
* @param string $pathname 图像保存路径名称
|
||
* @param null|string $type 图像类型
|
||
* @param int $quality 图像质量
|
||
* @param bool $interlace 是否对JPEG类型图像设置隔行扫描
|
||
* @return $this
|
||
*/
|
||
public function save($pathname, $type = null, $quality = 80, $interlace = true)
|
||
{
|
||
//自动获取图像类型
|
||
if (is_null($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->im, $interlace);
|
||
imagejpeg($this->im, $pathname, $quality);
|
||
} elseif ('gif' == $type && !empty($this->gif)) {
|
||
$this->gif->save($pathname);
|
||
} elseif ('png' == $type) {
|
||
//设定保存完整的 alpha 通道信息
|
||
imagesavealpha($this->im, true);
|
||
//ImagePNG生成图像的质量范围从0到9的
|
||
imagepng($this->im, $pathname, min((int) ($quality / 10), 9));
|
||
} else {
|
||
$fun = 'image' . $type;
|
||
$fun($this->im, $pathname);
|
||
}
|
||
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 返回图像宽度
|
||
* @return int 图像宽度
|
||
*/
|
||
public function width()
|
||
{
|
||
return $this->info['width'];
|
||
}
|
||
|
||
/**
|
||
* 返回图像高度
|
||
* @return int 图像高度
|
||
*/
|
||
public function height()
|
||
{
|
||
return $this->info['height'];
|
||
}
|
||
|
||
/**
|
||
* 返回图像类型
|
||
* @return string 图像类型
|
||
*/
|
||
public function type()
|
||
{
|
||
return $this->info['type'];
|
||
}
|
||
|
||
/**
|
||
* 返回图像MIME类型
|
||
* @return string 图像MIME类型
|
||
*/
|
||
public function mime()
|
||
{
|
||
return $this->info['mime'];
|
||
}
|
||
|
||
/**
|
||
* 返回图像尺寸数组 0 - 图像宽度，1 - 图像高度
|
||
* @return array 图像尺寸
|
||
*/
|
||
public function size()
|
||
{
|
||
return [$this->info['width'], $this->info['height']];
|
||
}
|
||
|
||
/**
|
||
* 旋转图像
|
||
* @param int $degrees 顺时针旋转的度数
|
||
* @return $this
|
||
*/
|
||
public function rotate($degrees = 90)
|
||
{
|
||
do {
|
||
$img = imagerotate($this->im, -$degrees, imagecolorallocatealpha($this->im, 0, 0, 0, 127));
|
||
imagedestroy($this->im);
|
||
$this->im = $img;
|
||
} while (!empty($this->gif) && $this->gifNext());
|
||
|
||
$this->info['width'] = imagesx($this->im);
|
||
$this->info['height'] = imagesy($this->im);
|
||
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 翻转图像
|
||
* @param integer $direction 翻转轴,X或者Y
|
||
* @return $this
|
||
*/
|
||
public function flip($direction = self::FLIP_X)
|
||
{
|
||
//原图宽度和高度
|
||
$w = $this->info['width'];
|
||
$h = $this->info['height'];
|
||
|
||
do {
|
||
|
||
$img = imagecreatetruecolor($w, $h);
|
||
|
||
switch ($direction) {
|
||
case self::FLIP_X:
|
||
for ($y = 0; $y < $h; $y++) {
|
||
imagecopy($img, $this->im, 0, $h - $y - 1, 0, $y, $w, 1);
|
||
}
|
||
break;
|
||
case self::FLIP_Y:
|
||
for ($x = 0; $x < $w; $x++) {
|
||
imagecopy($img, $this->im, $w - $x - 1, 0, $x, 0, 1, $h);
|
||
}
|
||
break;
|
||
default:
|
||
throw new ImageException('不支持的翻转类型');
|
||
}
|
||
|
||
imagedestroy($this->im);
|
||
$this->im = $img;
|
||
|
||
} while (!empty($this->gif) && $this->gifNext());
|
||
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*
|
||
* @return $this
|
||
*/
|
||
public function crop($w, $h, $x = 0, $y = 0, $width = null, $height = null)
|
||
{
|
||
//设置保存尺寸
|
||
empty($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->im, 0, 0, $x, $y, $width, $height, $w, $h);
|
||
imagedestroy($this->im); //销毁原图
|
||
//设置新图像
|
||
$this->im = $img;
|
||
} while (!empty($this->gif) && $this->gifNext());
|
||
$this->info['width'] = (int) $width;
|
||
$this->info['height'] = (int) $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 int $type 缩略图裁剪类型
|
||
*
|
||
* @return $this
|
||
*/
|
||
public function thumb($width, $height, $type = self::THUMB_SCALING)
|
||
{
|
||
//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 self::THUMB_SCALING:
|
||
//原图尺寸小于缩略图尺寸则不进行缩略
|
||
if ($w < $width && $h < $height) {
|
||
return $this;
|
||
}
|
||
//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 self::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 self::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 self::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'] - $h;
|
||
break;
|
||
/* 填充 */
|
||
case self::THUMB_FILLED:
|
||
//计算缩放比例
|
||
if ($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;
|
||
$x = $this->info['width'] - $w;
|
||
$y = $this->info['height'] - $h;
|
||
$posx = ($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->im, $posx, $posy, $x, $y, $neww, $newh, $w, $h);
|
||
imagedestroy($this->im); //销毁原图
|
||
$this->im = $img;
|
||
} while (!empty($this->gif) && $this->gifNext());
|
||
$this->info['width'] = (int) $width;
|
||
$this->info['height'] = (int) $height;
|
||
return $this;
|
||
/* 固定 */
|
||
case self::THUMB_FIXED:
|
||
$x = $y = 0;
|
||
break;
|
||
default:
|
||
throw new ImageException('不支持的缩略图裁剪类型');
|
||
}
|
||
/* 裁剪图像 */
|
||
return $this->crop($w, $h, $x, $y, $width, $height);
|
||
}
|
||
|
||
/**
|
||
* 添加水印
|
||
*
|
||
* @param string $source 水印图片路径
|
||
* @param int $locate 水印位置
|
||
* @param int $alpha 透明度
|
||
* @return $this
|
||
*/
|
||
public function water($source, $locate = self::WATER_SOUTHEAST, $alpha = 100)
|
||
{
|
||
if (!is_file($source)) {
|
||
throw new ImageException('水印图像不存在');
|
||
}
|
||
//获取水印图像信息
|
||
$info = getimagesize($source);
|
||
if (false === $info || (IMAGETYPE_GIF === $info[2] && empty($info['bits']))) {
|
||
throw new ImageException('非法水印文件');
|
||
}
|
||
//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 self::WATER_SOUTHEAST:
|
||
$x = $this->info['width'] - $info[0];
|
||
$y = $this->info['height'] - $info[1];
|
||
break;
|
||
/* 左下角水印 */
|
||
case self::WATER_SOUTHWEST:
|
||
$x = 0;
|
||
$y = $this->info['height'] - $info[1];
|
||
break;
|
||
/* 左上角水印 */
|
||
case self::WATER_NORTHWEST:
|
||
$x = $y = 0;
|
||
break;
|
||
/* 右上角水印 */
|
||
case self::WATER_NORTHEAST:
|
||
$x = $this->info['width'] - $info[0];
|
||
$y = 0;
|
||
break;
|
||
/* 居中水印 */
|
||
case self::WATER_CENTER:
|
||
$x = ($this->info['width'] - $info[0]) / 2;
|
||
$y = ($this->info['height'] - $info[1]) / 2;
|
||
break;
|
||
/* 下居中水印 */
|
||
case self::WATER_SOUTH:
|
||
$x = ($this->info['width'] - $info[0]) / 2;
|
||
$y = $this->info['height'] - $info[1];
|
||
break;
|
||
/* 右居中水印 */
|
||
case self::WATER_EAST:
|
||
$x = $this->info['width'] - $info[0];
|
||
$y = ($this->info['height'] - $info[1]) / 2;
|
||
break;
|
||
/* 上居中水印 */
|
||
case self::WATER_NORTH:
|
||
$x = ($this->info['width'] - $info[0]) / 2;
|
||
$y = 0;
|
||
break;
|
||
/* 左居中水印 */
|
||
case self::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 {
|
||
throw new ImageException('不支持的水印位置类型');
|
||
}
|
||
}
|
||
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->im, 0, 0, $x, $y, $info[0], $info[1]);
|
||
imagecopy($src, $water, 0, 0, 0, 0, $info[0], $info[1]);
|
||
imagecopymerge($this->im, $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);
|
||
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 int $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 $this
|
||
* @throws ImageException
|
||
*/
|
||
public function text($text, $font, $size, $color = '#00000000',
|
||
$locate = self::WATER_SOUTHEAST, $offset = 0, $angle = 0) {
|
||
|
||
if (!is_file($font)) {
|
||
throw new ImageException("不存在的字体文件：{$font}");
|
||
}
|
||
//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 self::WATER_SOUTHEAST:
|
||
$x += $this->info['width'] - $w;
|
||
$y += $this->info['height'] - $h;
|
||
break;
|
||
/* 左下角文字 */
|
||
case self::WATER_SOUTHWEST:
|
||
$y += $this->info['height'] - $h;
|
||
break;
|
||
/* 左上角文字 */
|
||
case self::WATER_NORTHWEST:
|
||
// 起始坐标即为左上角坐标，无需调整
|
||
break;
|
||
/* 右上角文字 */
|
||
case self::WATER_NORTHEAST:
|
||
$x += $this->info['width'] - $w;
|
||
break;
|
||
/* 居中文字 */
|
||
case self::WATER_CENTER:
|
||
$x += ($this->info['width'] - $w) / 2;
|
||
$y += ($this->info['height'] - $h) / 2;
|
||
break;
|
||
/* 下居中文字 */
|
||
case self::WATER_SOUTH:
|
||
$x += ($this->info['width'] - $w) / 2;
|
||
$y += $this->info['height'] - $h;
|
||
break;
|
||
/* 右居中文字 */
|
||
case self::WATER_EAST:
|
||
$x += $this->info['width'] - $w;
|
||
$y += ($this->info['height'] - $h) / 2;
|
||
break;
|
||
/* 上居中文字 */
|
||
case self::WATER_NORTH:
|
||
$x += ($this->info['width'] - $w) / 2;
|
||
break;
|
||
/* 左居中文字 */
|
||
case self::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 += $posy;
|
||
} else {
|
||
throw new ImageException('不支持的文字位置类型');
|
||
}
|
||
}
|
||
/* 设置偏移量 */
|
||
if (is_array($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)) {
|
||
throw new ImageException('错误的颜色值');
|
||
}
|
||
do {
|
||
/* 写入文字 */
|
||
$col = imagecolorallocatealpha($this->im, $color[0], $color[1], $color[2], $color[3]);
|
||
imagettftext($this->im, $size, $angle, $x + $ox, $y + $oy, $col, $font, $text);
|
||
} while (!empty($this->gif) && $this->gifNext());
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 切换到GIF的下一帧并保存当前帧
|
||
*/
|
||
protected function gifNext()
|
||
{
|
||
ob_start();
|
||
ob_implicit_flush(0);
|
||
imagegif($this->im);
|
||
$img = ob_get_clean();
|
||
$this->gif->image($img);
|
||
$next = $this->gif->nextImage();
|
||
if ($next) {
|
||
imagedestroy($this->im);
|
||
$this->im = imagecreatefromstring($next);
|
||
return $next;
|
||
} else {
|
||
imagedestroy($this->im);
|
||
$this->im = imagecreatefromstring($this->gif->image());
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 析构方法，用于销毁图像资源
|
||
*/
|
||
public function __destruct()
|
||
{
|
||
empty($this->im) || imagedestroy($this->im);
|
||
}
|
||
|
||
}
|