PHP Zend_Pdf_ElementFactory::newStreamObject方法代碼示例

 /**
  * Object constructor.
  *
  * If resource is not a Zend_Pdf_Element object, then stream object with specified value is
  * generated.
  *
  * @param Zend_Pdf_Element|string $resource
  */
 public function __construct($resource)
 {
     $this->_processedFacories = array();
     $this->_objectFactory = new Zend_Pdf_ElementFactory(1);
     if ($resource instanceof Zend_Pdf_Element) {
         $this->_resource = $this->_objectFactory->newObject($resource);
     } else {
         $this->_resource = $this->_objectFactory->newStreamObject($resource);
     }
 }

 /**
  * Dump current drawing instructions into the content stream.
  *
  * @todo Don't forget to close all current graphics operations (like path drawing)
  *
  * @throws Zend_Pdf_Exception
  */
 public function flush()
 {
     if ($this->_saveCount != 0) {
         throw new Zend_Pdf_Exception('Saved graphics state is not restored');
     }
     if ($this->_contents == '') {
         return;
     }
     if ($this->_pageDictionary->Contents->getType() != Zend_Pdf_Element::TYPE_ARRAY) {
         /**
          * It's a stream object.
          * Prepare Contents page attribute for update.
          */
         $this->_pageDictionary->touch();
         $currentPageContents = $this->_pageDictionary->Contents;
         $this->_pageDictionary->Contents = new Zend_Pdf_Element_Array();
         $this->_pageDictionary->Contents->items[] = $currentPageContents;
     } else {
         $this->_pageDictionary->Contents->touch();
     }
     $this->_pageDictionary->Contents->items[] = $this->_objFactory->newStreamObject($this->_contents);
     $this->_contents == '';
 }

//.........這裏部分代碼省略.........
     fclose($imageFile);
     $compressed = true;
     $imageDataTmp = '';
     $smaskData = '';
     switch ($color) {
         case Zend_Pdf_Image_Png::PNG_CHANNEL_RGB:
             $colorSpace = new Zend_Pdf_Element_Name('DeviceRGB');
             break;
         case Zend_Pdf_Image_Png::PNG_CHANNEL_GRAY:
             $colorSpace = new Zend_Pdf_Element_Name('DeviceGray');
             break;
         case Zend_Pdf_Image_Png::PNG_CHANNEL_INDEXED:
             if (empty($paletteData)) {
                 throw new Zend_Pdf_Exception("PNG Corruption: No palette data read for indexed type PNG.");
             }
             $colorSpace = new Zend_Pdf_Element_Array();
             $colorSpace->items[] = new Zend_Pdf_Element_Name('Indexed');
             $colorSpace->items[] = new Zend_Pdf_Element_Name('DeviceRGB');
             $colorSpace->items[] = new Zend_Pdf_Element_Numeric(strlen($paletteData) / 3 - 1);
             $paletteObject = $this->_objectFactory->newObject(new Zend_Pdf_Element_String_Binary($paletteData));
             $colorSpace->items[] = $paletteObject;
             break;
         case Zend_Pdf_Image_Png::PNG_CHANNEL_GRAY_ALPHA:
             /*
              * To decode PNG's with alpha data we must create two images from one. One image will contain the Gray data
              * the other will contain the Gray transparency overlay data. The former will become the object data and the latter
              * will become the Shadow Mask (SMask).
              */
             if ($bits > 8) {
                 throw new Zend_Pdf_Exception("Alpha PNGs with bit depth > 8 are not yet supported");
             }
             $colorSpace = new Zend_Pdf_Element_Name('DeviceGray');
             $decodingObjFactory = new Zend_Pdf_ElementFactory(1);
             $decodingStream = $decodingObjFactory->newStreamObject($imageData);
             $decodingStream->dictionary->Filter = new Zend_Pdf_Element_Name('FlateDecode');
             $decodingStream->dictionary->DecodeParms = new Zend_Pdf_Element_Dictionary();
             $decodingStream->dictionary->DecodeParms->Predictor = new Zend_Pdf_Element_Numeric(15);
             $decodingStream->dictionary->DecodeParms->Columns = new Zend_Pdf_Element_Numeric($width);
             $decodingStream->dictionary->DecodeParms->Colors = new Zend_Pdf_Element_Numeric(2);
             //GreyAlpha
             $decodingStream->dictionary->DecodeParms->BitsPerComponent = new Zend_Pdf_Element_Numeric($bits);
             $decodingStream->skipFilters();
             $pngDataRawDecoded = $decodingStream->value;
             //Iterate every pixel and copy out gray data and alpha channel (this will be slow)
             for ($pixel = 0, $pixelcount = $width * $height; $pixel < $pixelcount; $pixel++) {
                 $imageDataTmp .= $pngDataRawDecoded[$pixel * 2];
                 $smaskData .= $pngDataRawDecoded[$pixel * 2 + 1];
             }
             $compressed = false;
             $imageData = $imageDataTmp;
             //Overwrite image data with the gray channel without alpha
             break;
         case Zend_Pdf_Image_Png::PNG_CHANNEL_RGB_ALPHA:
             /*
              * To decode PNG's with alpha data we must create two images from one. One image will contain the RGB data
              * the other will contain the Gray transparency overlay data. The former will become the object data and the latter
              * will become the Shadow Mask (SMask).
              */
             if ($bits > 8) {
                 throw new Zend_Pdf_Exception("Alpha PNGs with bit depth > 8 are not yet supported");
             }
             $colorSpace = new Zend_Pdf_Element_Name('DeviceRGB');
             $decodingObjFactory = new Zend_Pdf_ElementFactory(1);
             $decodingStream = $decodingObjFactory->newStreamObject($imageData);
             $decodingStream->dictionary->Filter = new Zend_Pdf_Element_Name('FlateDecode');
             $decodingStream->dictionary->DecodeParms = new Zend_Pdf_Element_Dictionary();