<?php
namespace App\Lib;
class ImagickHelper
{
/**
* 创建一张透明图片
* @param [int] $width [要创建的图片宽度]
* @param [int] $height [要创建的图片高度]
* @return [image] [透明图片]
*/
public static function createTransparentImage($width, $height, $format = 'png')
{
$image = new \Imagick();
$image->newImage($width, $height,"none");
$image->setImageFormat($format);
return $image;
}
/**
* 创建一个带背景的图片
* @param [int] $width [图片宽度]
* @param [int] $height [图片高度]
* @param [object] $template [模板对象]
* @return [imagick] [图像资源]
*/
public static function createBackgroundImage($width, $height, $bg_img_path, $format = 'png')
{
$imagick = new \Imagick($bg_img_path);
$imagick->adaptiveResizeImage($width,$height);//使用数据相关三角测量自适应调整图像大小
$imagick->setImageFormat($format);
return $imagick;
}
/**
* 创建一个或一组ico图片
* @param [string] $src_img [原图片路径]
* @param string $filename [保存的路径包括文件名称，默认当前路径，名称favicon.ico]
* @param boolean $adjoin [保存类型，true保存一个，false保存一组]
* @return [type] [description]
*/
public static function createIcoImage($src_img, $filename = "favicon.ico", $adjoin = true)
{
$src_img = new \Imagick($src_img);
$icon = new \Imagick();
$geo = $src_img->getImageGeometry();
$size_w = $geo['width'];
$size_h = $geo['height'];
$icon->setFormat("ico");
if (128/$size_w*$size_h>128) {
$src_img->scaleImage(128,0);
} else {
$src_img->scaleImage(0,128);
}
$src_img->cropImage(128, 128, 0, 0);
$clone = clone $src_img;
$clone->scaleImage(16,0);
$icon->addImage($clone);
$clone = clone $src_img;
$clone->scaleImage(32,0);
$icon->addImage($clone);
$clone = clone $src_img;
$clone->scaleImage(64,0);
$icon->addImage($clone);
$clone = clone $src_img;
$clone->scaleImage(128,0);
$icon->addImage($clone);
if($icon->writeImages($filename, $adjoin)){
$src_img->destroy();
$icon->destroy();
$clone->destroy();
return true;
}else{
$src_img->destroy();
$icon->destroy();
$clone->destroy();
return true;
}
}
/**
* 截取图片的一块区域
* @param [string] $image_path [图片的路径]
* @param [int] $start_x [裁剪区域左上角的 X 轴坐标（以原图的左上角为原点）]
* @param [int] $start_y [裁剪区域左上角的 X 轴坐标（以原图的左上角为原点）]
* @param [int] $width [截图的宽度]
* @param [int] $height [截图的高度]
* @param [string] $format [保存格式]
* @return [imagick] [图片资源]
*/
public static function cropImage($image_path, $start_x, $start_y, $width, $height, $format = 'png')
{
$image_path = self::url_to_realpath($image_path);
$imagick = new \Imagick(realpath($image_path));
$imagick->cropImage($width, $height, $start_x, $start_y);
$imagick->setImageFormat($format);
return $imagick;
}
/**
* 网址转化成绝对地址
* @param [string] $url [网址]
* @return [string] [转换后的绝对地址]
*/
public static function url_to_realpath($url)
{
if(preg_match('/^(http:\/\/)|^(https:\/\/)/i', $url)){
$url = parse_url($url)['path'];
$url = ltrim($url, '/');
$url = realpath($url);
}
return $url;
}
/**
* 缩放一张图片
* @param [string] $image_path [图片的路径]
* @param [int] $width [缩放后的宽度]
* @param [int] $height [缩放后的高度]
* @param [boolean] $opinion [是否锁定纵横比]
* @return [imagick] [图片资源]
*/
public static function ThumbnailImage($image_path, $width, $height, $opinion = false)
{
$image_path = self::url_to_realpath($image_path);
$image = new \Imagick($image_path);
$image->ThumbnailImage($width, $height, $opinion);
return $image;
}
/**
* 根据布局数据和缩放比例返回一个布局的缩略图
*
* @author linyan
* @param [array] $layout [布局的数组数据]
* @param [resource] $imagick [透明的图像资源]
* @param [float] $scaling [缩放比例]
* @return [resource] [缩略图]
*/
private static function drawRegions($layout, $imagick, $scaling)
{
$width = $imagick->getImageWidth();
$height = $imagick->getImageHeight();
$scale_width = ceil($width * $scaling); //向上舍入接近整数
$scale_height = ceil($height * $scaling);
foreach ($layout as $key => $region) {
//判断是否有背景颜色
if (array_has($region, 'backgroundColor')) {
//为图像分配颜色
$fillColor = new \ImagickPixel($region['backgroundColor']);
} else {
//为图像分配颜色
$fillColor = new \ImagickPixel("rgb(155, 255, 255)");
}
//画一矩形并填充
$draw = new \ImagickDraw();
$draw->setFillColor($fillColor);//填充颜色
$draw->rectangle($region['left'], $region['top'], $region['left'] + $region['width'], $region['top'] + $region['height']);
$imagick->setImageFormat("png");
$imagick->drawImage($draw);
}
$imagick->cropThumbnailImage($scale_width, $scale_height);
//缩放后，向区域中增加图标显示
foreach ($layout as $key => $region) {
$icon_img_path = sprintf("images/icon/%s.png", $region['type']);
if (file_exists($icon_img_path)) {
$imagick_img = new \Imagick($icon_img_path);
$icon_width = $imagick_img->getImageWidth();
$icon_height = $imagick_img->getImageHeight();
$scale_top = $region['top'] * $scaling + $region['height'] * $scaling / 2 - $icon_height / 2;
$scale_left = $region['left'] * $scaling + $region['width'] * $scaling / 2 - $icon_width / 2;
$imagick->compositeImage($imagick_img, $imagick_img->getImageCompose(), $scale_left, $scale_top);
}
}
return $imagick;
}
/**
* 在图片上加文字
* @param [imagick] $image [图片资源]
* @param float $x [x坐标]
* @param float $y [y坐标]
* @param string $text [文字内容]
* @return [imagick] [图片资源]
*/
public static function annotation($image, float $x , float $y , string $text )
{
$draw = new \ImagickDraw();
$fillColor = new \ImagickPixel('#fff');
// $strokeColor = new \ImagickPixel('#000');
// $draw->setFont("fonts/msyh.ttf");
$draw->setStrokeWidth(12);
$draw->setFontSize(36);
// $draw->setStrokeColor($strokeColor);//设置用于描绘对象轮廓的颜色
$draw->setFillColor($fillColor);//设置用于绘制填充对象的填充颜色
$draw->setStrokeAntialias(true);//控制描边轮廓是否反锯齿
$draw->setTextAntialias(true);//控制文本是否反锯齿
@$draw->setFillAlpha(0.39);//设置不透明度
$draw->annotation($x,$y,$text);
$image->drawImage($draw);
return $image;
}
}
