php批量打印发票二(php用Imagick将PDF转成图片)

二. 将PDF转成jpg图片

过程:

1. 安装Imagick扩展.  

2. 安装ImageMagick功能

3. 安装ghostScript功能

安装完成后, 可以开始测试

因为有些发票带销货清单,和发票纸张方向不同,必须做标记,下一步函数才能识别,根据方向来新建PDF页面. FPDF中,p是横向,L是坚向,

在应用过程中,发现png占用量少,就全用png, 没用Jpg

/*
 * 分页转图片
 */
function pdfToJpg($from_path,$target_path){
    $arr = array();
    try{
        $img = new Imagick();
        $img->setCompressionQuality(100);
        $img->setResolution(180,180);
        $img->readImage($from_path);

        $imgNum = $img->getNumberImages();

        foreach ($img as $k => $sub){
            $canvas = new Imagick(); //定义新图片
            $sub->setImageFormat('png');
            $sub->stripImage();
            $sub->trimImage(0);
            $width = $sub->getImageWidth() + 100;
            $height = $sub->getImageHeight() + 100;
            //正常转图片画布
            $canvas->newImage($width,$height,new ImagickPixel('white'));
            $canvas->compositeImage($sub,Imagick::COMPOSITE_DEFAULT,50,50);

            $canvas->resetIterator();
            //给横向的图片做一个标记
            if($width<$height)
            {
                $canvas->appendImages(true)->writeImage($target_path.'_'.$k.'_p.png');
                $arr[] = [$target_path.'_'.$k.'_p.png'];
            }
            else
            {
                $canvas->appendImages(true)->writeImage($target_path.'_'.$k.'.png');
                $arr[] = [$target_path.'_'.$k.'.png'];
            }

            //转发票二维码要的画布
            //$canvas->newImage(200,200,new ImagickPixel('white'));
            //$canvas->compositeImage($sub,Imagick::COMPOSITE_DEFAULT,5,5);
        }

        return $arr;
    }catch (Exception $e){
        echo $e->getMessage();
        echo $e->getTraceAsString();
        return false;
    }
}