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molong
2016-06-21 17:13:19 +08:00
parent 7ea154d684
commit 18896b4e98
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extend/org/image/driver/Imagick.php Normal file
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 麦当苗儿 <zuojiazi.cn@gmail.com> <http://www.zjzit.cn>
// +----------------------------------------------------------------------
namespace org\image\driver;
use think\Lang;
class Imagick
{
/**
* 图像资源对象
*
* @var resource
*/
private $im;
/**
* 图像信息，包括 width, height, type, mime, size
*
* @var array
*/
private $info;
/**
* 构造方法，可用于打开一张图像
*
* @param string $imgname 图像路径
*/
public function __construct($imgname = null)
{
if (!extension_loaded('Imagick')) {
throw new \Exception(Lang::get('_NOT_SUPPERT_') . ':Imagick');
}
$imgname && $this->open($imgname);
}
/**
* 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($imgname)) {
throw new \Exception('不存在的图像文件');
}
//销毁已存在的图像
empty($this->im) || $this->im->destroy();
//载入图像
$this->im = new \Imagick(realpath($imgname));
//设置图像信息
$this->info = [
'width' => $this->im->getImageWidth(),
'height' => $this->im->getImageHeight(),
'type' => strtolower($this->im->getImageFormat()),
'mime' => $this->im->getImageMimeType(),
];
}
/**
* 保存图像
*
* @param string $imgname 图像保存名称
* @param string $type 图像类型
* @param boolean $interlace 是否对JPEG类型图像设置隔行扫描
*/
public function save($imgname, $type = null, $interlace = true)
{
if (empty($this->im)) {
throw new \Exception('没有可以被保存的图像资源');
}
//设置图片类型
if (is_null($type)) {
$type = $this->info['type'];
} else {
$type = strtolower($type);
$this->im->setImageFormat($type);
}
//JPEG图像设置隔行扫描
if ('jpeg' == $type || 'jpg' == $type) {
$this->im->setImageInterlaceScheme(1);
}
//去除图像配置信息
$this->im->stripImage();
//保存图像
$imgname = realpath(dirname($imgname)) . '/' . basename($imgname); //强制绝对路径
if ('gif' == $type) {
$this->im->writeImages($imgname, true);
} else {
$this->im->writeImage($imgname);
}
}
/**
* 返回图像宽度
*
* @return integer 图像宽度
*/
public function width()
{
if (empty($this->im)) {
throw new \Exception('没有指定图像资源');
}
return $this->info['width'];
}
/**
* 返回图像高度
*
* @return integer 图像高度
*/
public function height()
{
if (empty($this->im)) {
throw new \Exception('没有指定图像资源');
}
return $this->info['height'];
}
/**
* 返回图像类型
*
* @return string 图像类型
*/
public function type()
{
if (empty($this->im)) {
throw new \Exception('没有指定图像资源');
}
return $this->info['type'];
}
/**
* 返回图像MIME类型
*
* @return string 图像MIME类型
*/
public function mime()
{
if (empty($this->im)) {
throw new \Exception('没有指定图像资源');
}
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->im)) {
throw new \Exception('没有指定图像资源');
}
return [$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->im)) {
throw new \Exception('没有可以被裁剪的图像资源');
}
//设置保存尺寸
empty($width) && $width = $w;
empty($height) && $height = $h;
//裁剪图片
if ('gif' == $this->info['type']) {
$img = $this->im->coalesceImages();
$this->im->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->im = $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->im;
//裁剪
$info = $this->info;
if (0 != $x || 0 != $y || $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) {
$img->scaleImage($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, $type = THINKIMAGE_THUMB_SCALE)
{
if (empty($this->im)) {
throw new \Exception('没有可以被缩略的图像资源');
}
//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 THINKIMAGE_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;
}
//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 THINKIMAGE_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 THINKIMAGE_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 THINKIMAGE_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'] - $h;
break;
/* 填充 */
case THINKIMAGE_THUMB_FILLED:
//计算缩放比例
if ($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']) {
$imgs = $this->im->coalesceImages();
$img = new Imagick();
$this->im->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->im->destroy();
$this->im = $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->im->destroy();
$this->im = $img;
}
//设置新图像属性
$this->info['width'] = $width;
$this->info['height'] = $height;
return;
/* 固定 */
case THINKIMAGE_THUMB_FIXED:
$x = $y = 0;
break;
default:
throw new \Exception('不支持的缩略图裁剪类型');
}
/* 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->im;
/* 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, $locate = THINKIMAGE_WATER_SOUTHEAST)
{
//资源检测
if (empty($this->im)) {
throw new \Exception('没有可以被添加水印的图像资源');
}
if (!is_file($source)) {
throw new \Exception('水印图像不存在');
}
//创建水印图像资源
$water = new Imagick(realpath($source));
$info = [$water->getImageWidth(), $water->getImageHeight()];
/* 设定水印位置 */
switch ($locate) {
/* 右下角水印 */
case THINKIMAGE_WATER_SOUTHEAST:
$x = $this->info['width'] - $info[0];
$y = $this->info['height'] - $info[1];
break;
/* 左下角水印 */
case THINKIMAGE_WATER_SOUTHWEST:
$x = 0;
$y = $this->info['height'] - $info[1];
break;
/* 左上角水印 */
case THINKIMAGE_WATER_NORTHWEST:
$x = $y = 0;
break;
/* 右上角水印 */
case THINKIMAGE_WATER_NORTHEAST:
$x = $this->info['width'] - $info[0];
$y = 0;
break;
/* 居中水印 */
case THINKIMAGE_WATER_CENTER:
$x = ($this->info['width'] - $info[0]) / 2;
$y = ($this->info['height'] - $info[1]) / 2;
break;
/* 下居中水印 */
case THINKIMAGE_WATER_SOUTH:
$x = ($this->info['width'] - $info[0]) / 2;
$y = $this->info['height'] - $info[1];
break;
/* 右居中水印 */
case THINKIMAGE_WATER_EAST:
$x = $this->info['width'] - $info[0];
$y = ($this->info['height'] - $info[1]) / 2;
break;
/* 上居中水印 */
case THINKIMAGE_WATER_NORTH:
$x = ($this->info['width'] - $info[0]) / 2;
$y = 0;
break;
/* 左居中水印 */
case THINKIMAGE_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 \Exception('不支持的水印位置类型');
}
}
//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']) {
$img = $this->im->coalesceImages();
$this->im->destroy(); //销毁原图
do {
//添加水印
$img->drawImage($draw);
} while ($img->nextImage());
//压缩图片
$this->im = $img->deconstructImages();
$img->destroy(); //销毁零时图片
} else {
//添加水印
$this->im->drawImage($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 = THINKIMAGE_WATER_SOUTHEAST, $offset = 0, $angle = 0) {
//资源检测
if (empty($this->im)) {
throw new \Exception('没有可以被写入文字的图像资源');
}
if (!is_file($font)) {
throw new \Exception("不存在的字体文件：{$font}");
}
//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, '#')) {
throw new \Exception('错误的颜色值');
}
$col = substr($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 = $this->im->queryFontMetrics($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 THINKIMAGE_WATER_SOUTHEAST:
$x += $this->info['width'] - $w;
$y += $this->info['height'] - $h;
break;
/* 左下角文字 */
case THINKIMAGE_WATER_SOUTHWEST:
$y += $this->info['height'] - $h;
break;
/* 左上角文字 */
case THINKIMAGE_WATER_NORTHWEST:
// 起始坐标即为左上角坐标，无需调整
break;
/* 右上角文字 */
case THINKIMAGE_WATER_NORTHEAST:
$x += $this->info['width'] - $w;
break;
/* 居中文字 */
case THINKIMAGE_WATER_CENTER:
$x += ($this->info['width'] - $w) / 2;
$y += ($this->info['height'] - $h) / 2;
break;
/* 下居中文字 */
case THINKIMAGE_WATER_SOUTH:
$x += ($this->info['width'] - $w) / 2;
$y += $this->info['height'] - $h;
break;
/* 右居中文字 */
case THINKIMAGE_WATER_EAST:
$x += $this->info['width'] - $w;
$y += ($this->info['height'] - $h) / 2;
break;
/* 上居中文字 */
case THINKIMAGE_WATER_NORTH:
$x += ($this->info['width'] - $w) / 2;
break;
/* 左居中文字 */
case THINKIMAGE_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 += $posy;
} else {
throw new \Exception('不支持的文字位置类型');
}
}
/* 设置偏移量 */
if (is_array($offset)) {
$offset = array_map('intval', $offset);
list($ox, $oy) = $offset;
} else {
$offset = intval($offset);
$ox = $oy = $offset;
}
/* 写入文字 */
if ('gif' == $this->info['type']) {
$img = $this->im->coalesceImages();
$this->im->destroy(); //销毁原图
do {
$img->annotateImage($draw, $x + $ox, $y + $oy, $angle, $text);
} while ($img->nextImage());
//压缩图片
$this->im = $img->deconstructImages();
$img->destroy(); //销毁零时图片
} else {
$this->im->annotateImage($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->im) || $this->im->destroy();
}
}