PHP imagick::setCompressionQuality方法代码示例

function pdf2png($PDF,$Path){
   if(!extension_loaded('imagick')){
	   echo 'no imagick';
       return false;
   }
   if(!file_exists($PDF)){
   	   echo 'no file';
       return false;
   }
 
   $IM = new imagick();
   echo 'image create';
  // $IM->setResolution(794,1123);
  // echo 'image resolution';
   $IM->setCompressionQuality(100);
   echo 'image quality';   
   $IM->readImage($PDF);
   echo 'pdf read';      
   foreach ($IM as $Key => $Var){
	   echo 'image convert';
       $Var->setImageFormat('png');
       $Filename = $Path.'/'.md5($Key.time()).'.png';
       if($Var->writeImage($Filename) == true){
           $Return[] = $Filename;
       }
   }
   return $Return;
}

function pdftojpg($pdfFile, $jpgFile)
{
    /*  
     * imagemagick and php5-imagick required 
     * 
     * all options for imagick: 
     *           http://php.net/manual/fr/class.imagick.php 
     * 
     */
    $pdf_file = $pdfFile;
    $save_to = $jpgFile;
    $img = new imagick();
    //this must be called before reading the image, otherwise has no effect - "-density {$x_resolution}x{$y_resolution}"
    //this is important to give good quality output, otherwise text might be unclear
    $img->setResolution(200, 200);
    //read the pdf
    $img->readImage("{$pdf_file}[0]");
    //reduce the dimensions - scaling will lead to black color in transparent regions
    $img->scaleImage(1920, 1080);
    //set new format
    $img->setCompressionQuality(80);
    $img->setImageFormat('jpg');
    // -flatten option, this is necessary for images with transparency, it will produce white background for transparent regions
    $img = $img->flattenImages();
    //save image file
    $img->writeImages($save_to, false);
    //clean
    $img->clear();
    $img->destroy();
}

 public function generatePreviewImage($pdfFile, $saveTo)
 {
     try {
         $img = new imagick(Director::getAbsFile($pdfFile) . "[0]");
         //we only take first page
         // -flatten option, this is necessary for images with transparency, it will produce white background for transparent regions
         $img->setImageAlphaChannel(11);
         //Imagick::ALPHACHANNEL_REMOVE has been added in 3.2.0b2
         $img->mergeImageLayers(imagick::LAYERMETHOD_FLATTEN);
         //set new format
         //@Todo detect format from filename
         $img->setImageFormat('jpg');
         $img->setCompressionQuality(100);
         //save image file
         $img->writeImages($saveTo, false);
     } catch (\Exception $e) {
         error_log($e->getMessage());
         return false;
     }
     return true;
 }

function pdf2png($PDF,$Path,$ImageName){
   if(!extension_loaded('imagick')){
	   echo "<p>no imagick'</p>";
       return false;
   }
   if(!file_exists($PDF)){
	   echo "<p>no file'</p>";	   
       return false;
   }
 
   $IM = new imagick();
   $IM->setOption('density','200');
   $IM->setOption('antialias','');
   $IM->setOption('sharpen','0x1.0');
   //$IM->setResolution(794,1123);
  // echo 'image resolution';
   $IM->setCompressionQuality(100);  
   $IM->readImage($PDF);     
   foreach ($IM as $Key => $Var){
	   $Var->paintTransparentImage($Var->getImageBackgroundColor(), 1, 10000);
       $Var->setImageFormat('png');

       $Filename = $Path.'/'.$ImageName.'.png';
	   
       if($Var->writeImage($Filename) == true){
           $Return[] = $Filename;
       }
	   
   }
   
   return $Return;
}

 private function resize_imagick($src, $width, $height, $quality)
 {
     try {
         $img = new imagick($src);
         if (strtoupper($img->getImageFormat()) === 'JPEG') {
             $img->setImageCompression(imagick::COMPRESSION_JPEG);
             $img->setCompressionQuality($quality);
         }
         $img->resizeImage($width, $height, Imagick::FILTER_LANCZOS, true);
         $result = $img->writeImage($src);
         $img->clear();
         $img->destroy();
         return $result ? true : false;
     } catch (Exception $e) {
         return false;
     }
 }

 private function resizeCropImg($pFolder, $pImg, $pW, $pH)
 {
     $im = new imagick();
     $im->readImage($pFolder . $pImg);
     $image = new stdClass();
     $image->dimensions = $im->getImageGeometry();
     $image->w = $image->dimensions['width'];
     $image->h = $image->dimensions['height'];
     $image->ratio = $image->w / $image->h;
     if ($image->w / $pW < $image->h / $pH) {
         $h = ceil($pH * $image->w / $pW);
         $y = ($image->h - $pH * $image->w / $pW) / 2;
         $im->cropImage($image->w, $h, 0, $y);
     } else {
         $w = ceil($pW * $image->h / $pH);
         $x = ($image->w - $pW * $image->h / $pH) / 2;
         $im->cropImage($w, $image->h, $x, 0);
     }
     $im->ThumbnailImage($pW, $pH, true);
     if ($img->type === "PNG") {
         $im->setImageCompressionQuality(55);
         $im->setImageFormat('png');
     } elseif ($img->type === "JPG" || $img->type === "JPEG") {
         $im->setCompressionQuality(100);
         $im->setImageFormat("jpg");
     }
     $im->writeImage($this->ad->url->folder . '/assets/' . $pImg);
     $im->destroy();
 }

            if (PHP_OS == 'Linux') {
                //Linux平台
                $wbshell1 = "xvfb-run --server-args=\"-screen 0, 1024x768x24\" cutycapt --min-width=460 --url=" . $site_url . " --out=" . $img_name;
                $wbshell2 = "xvfb-run --server-args=\"-screen 0, 1024x768x24\" cutycapt --min-width=1024 --url=" . $site_url . " --out=" . $img_name;
            }
        }
        //根据生成图片的大小调用语句
        $wbshell = $picsize == 1 ? $wbshell1 : $wbshell2;
        //执行截图语句
        system($wbshell);
        //exec($wbshell);
        //注：下面的操作仅是对图片进一步进行调整，可以缩小图片体积等，并方便更多的处理，并非必须。
        $im = new imagick($img_name);
        //if($picsize==1) $im->resizeImage(490,0,Imagick::FILTER_LANCZOS,1);
        $im->setImageFormat("png");
        $im->setCompressionQuality(90);
        $img_name2 = 'html2png/' . time() . '.png';
        $im->writeImage($img_name2);
        $im->clear();
        $im->destroy();
        //输出图片连接
        $url_this = dirname('http://' . $_SERVER['SERVER_NAME'] . $_SERVER["REQUEST_URI"]) . '/' . $img_name2;
    } else {
        $url_this = dirname('http://' . $_SERVER['SERVER_NAME'] . $_SERVER["REQUEST_URI"]) . '/google.png';
    }
    ?>
<div class="wrapper" >
<h1>内容生成工具</h1>
<ul>
    <li><?php 
    echo $errinfo;

 /**
  * class_make_file::create_img_frompdf()
  * 
  * @param mixed $pdf_org
  * @param mixed $pfadhier
  * @return
  */
 private function create_img_frompdf($pdf_org, $pfadhier)
 {
     setlocale(LC_ALL, "de_DE");
     //Klasse INI
     $im = new imagick();
     //Auflösung
     $im->setResolution(60, 60);
     //Anzahl der Seiten des PDFs
     $pages = $this->getNumPagesInPDF($pfadhier . $pdf_org);
     //Dann alle Seiten durchlaufen und Bilder erzeugen
     for ($i = 0; $i < $pages; $i++) {
         //Maximal 100 Seiten
         if ($i > 100) {
             continue;
         }
         //Seitenzahl festlegen
         $pdf = $pfadhier . $pdf_org . "[" . $i . "]";
         //auslesen
         if (file_exists($pfadhier . $pdf_org)) {
             try {
                 $im->readImage($pdf);
             } catch (Exception $e) {
                 echo 'Exception abgefangen: ', $e->getMessage(), "\n";
             }
             if (empty($e)) {
                 //die ("NIX");
                 $im->setImageColorspace(255);
                 $im->setCompression(Imagick::COMPRESSION_JPEG);
                 $im->setCompressionQuality(60);
                 $im->setImageFormat('jpg');
                 $im->setImageUnits(imagick::RESOLUTION_PIXELSPERINCH);
                 //Damti testweise ausgeben
                 #header( "Content-Type: image/png" );
                 #echo $im;
                 #exit();
                 $pdf_img = str_replace(".pdf", "", $pdf_org);
                 $pdf_img = str_replace("/files/pdf/", "", $pdf_img);
                 $im->setImageFileName($pfadhier . "files/images/thumbs/" . $pdf_img . "_" . $i . ".jpg");
                 //Pfade saven
                 echo $image_files[] = $pfadhier . "files/images/thumbs/" . $pdf_img . "_" . $i . ".jpg";
                 //Speichern
                 $im->writeImage();
                 ini_set(Display_errors, "1");
             }
             //Noch verkleinern... image_magick macht die Bilder zu groß
             /**
             			$image = new SimpleImage();
             	   		 $image->load($pfadhier."files/images/thumbs/".$pdf_img."_".$i.".jpg");
             $image->resizeToHeight(300);
             $image->save($pfadhier."files/images/thumbs/".$pdf_img."_".$i."x.jpg");
             unlink($pfadhier."files/images/thumbs/".$pdf_img."_".$i.".jpg");
             echo ($pfadhier."files/images/thumbs/".$pdf_img."_".$i."x.jpg");
             */
         }
     }
     return $image_files;
 }