<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Barcode

 * @subpackage Renderer

 * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id$

 */

/** @see Zend_Barcode_Renderer_RendererAbstract */

require_once 'Zend/Barcode/Renderer/RendererAbstract.php';

/** @see Zend_Pdf */

require_once 'Zend/Pdf.php';

/** @see Zend_Pdf_Page */

require_once 'Zend/Pdf/Page.php';

/** @see Zend_Pdf_Color_Rgb */

require_once 'Zend/Pdf/Color/Rgb.php';

/**

 * Class for rendering the barcode in PDF resource

 *

 * @category   Zend

 * @package    Zend_Barcode

 * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Barcode_Renderer_Pdf extends Zend_Barcode_Renderer_RendererAbstract

{

    /**

     * PDF resource

     * @var Zend_Pdf

     */

    protected $_resource = null;

    /**

     * Page number in PDF resource

     * @var integer

     */

    protected $_page = 0;

    /**

     * Module size rendering

     * @var float

     */

    protected $_moduleSize = 0.5;

    /**

     * Set an image resource to draw the barcode inside

     *

     * @param Zend_Pdf $pdf

     * @param int      $page

     * @return Zend_Barcode_Renderer

     * @throws Zend_Barcode_Renderer_Exception

     */

    public function setResource($pdf, $page = 0)

    {

        if (!$pdf instanceof Zend_Pdf) {

            require_once 'Zend/Barcode/Renderer/Exception.php';

            throw new Zend_Barcode_Renderer_Exception(

                'Invalid Zend_Pdf resource provided to setResource()'

            );

        }

        $this->_resource = $pdf;

        $this->_page     = intval($page);

        if (!count($this->_resource->pages)) {

            $this->_page = 0;

            $this->_resource->pages[] = new Zend_Pdf_Page(

                Zend_Pdf_Page::SIZE_A4

            );

        }

        return $this;

    }

    /**

     * Check renderer parameters

     *

     * @return void

     */

    protected function _checkParams()

    {

    }

    /**

     * Draw the barcode in the PDF, send headers and the PDF

     * @return mixed

     */

    public function render()

    {

        $this->draw();

        header("Content-Type: application/pdf");

        echo $this->_resource->render();

    }

    /**

     * Initialize the PDF resource

     * @return void

     */

    protected function _initRenderer()

    {

        if ($this->_resource === null) {

            $this->_resource = new Zend_Pdf();

            $this->_resource->pages[] = new Zend_Pdf_Page(

                Zend_Pdf_Page::SIZE_A4

            );

        }

        $pdfPage = $this->_resource->pages[$this->_page];

        $this->_adjustPosition($pdfPage->getHeight(), $pdfPage->getWidth());

    }

    /**

     * Draw a polygon in the rendering resource

     * @param array $points

     * @param integer $color

     * @param boolean $filled

     */

    protected function _drawPolygon($points, $color, $filled = true)

    {

        $page = $this->_resource->pages[$this->_page];

        foreach ($points as $point) {

            $x[] = $point[0] * $this->_moduleSize + $this->_leftOffset;

            $y[] = $page->getHeight() - $point[1] * $this->_moduleSize - $this->_topOffset;

        }

        if (count($y) == 4) {

            if ($x[0] != $x[3] && $y[0] == $y[3]) {

                $y[0] -= ($this->_moduleSize / 2);

                $y[3] -= ($this->_moduleSize / 2);

            }

            if ($x[1] != $x[2] && $y[1] == $y[2]) {

                $y[1] += ($this->_moduleSize / 2);

                $y[2] += ($this->_moduleSize / 2);

            }

        }

        $color = new Zend_Pdf_Color_Rgb(

            (($color & 0xFF0000) >> 16) / 255.0,

            (($color & 0x00FF00) >> 8) / 255.0,

            ($color & 0x0000FF) / 255.0

        );

        $page->setLineColor($color);

        $page->setFillColor($color);

        $page->setLineWidth($this->_moduleSize);

        $fillType = ($filled)

                  ? Zend_Pdf_Page::SHAPE_DRAW_FILL_AND_STROKE

                  : Zend_Pdf_Page::SHAPE_DRAW_STROKE;

        $page->drawPolygon($x, $y, $fillType);

    }

    /**

     * Draw a text in the rendering resource

     *

     * @param string    $text

     * @param float     $size

     * @param array     $position

     * @param string    $font

     * @param integer   $color

     * @param string    $alignment

     * @param float|int $orientation

     */

    protected function _drawText(

        $text,

        $size,

        $position,

        $font,

        $color,

        $alignment = 'center',

        $orientation = 0

    ) {

        $page  = $this->_resource->pages[$this->_page];

        $color = new Zend_Pdf_Color_Rgb(

            (($color & 0xFF0000) >> 16) / 255.0,

            (($color & 0x00FF00) >> 8) / 255.0,

            ($color & 0x0000FF) / 255.0

        );

        $page->setLineColor($color);

        $page->setFillColor($color);

        $page->setFont(Zend_Pdf_Font::fontWithPath($font), $size * $this->_moduleSize * 1.2);

        $width = $this->widthForStringUsingFontSize(

            $text,

            Zend_Pdf_Font::fontWithPath($font),

            $size * $this->_moduleSize

        );

        $angle = pi() * $orientation / 180;

        $left = $position[0] * $this->_moduleSize + $this->_leftOffset;

        $top  = $page->getHeight() - $position[1] * $this->_moduleSize - $this->_topOffset;

        switch ($alignment) {

            case 'center':

                $left -= ($width / 2) * cos($angle);

                $top  -= ($width / 2) * sin($angle);

                break;

            case 'right':

                $left -= $width;

                break;

        }

        $page->rotate($left, $top, $angle);

        $page->drawText($text, $left, $top);

        $page->rotate($left, $top, - $angle);

    }

    /**

     * Calculate the width of a string:

     * in case of using alignment parameter in drawText

     * @param string $text

     * @param Zend_Pdf_Font $font

     * @param float $fontSize

     * @return float

     */

    public function widthForStringUsingFontSize($text, $font, $fontSize)

    {

        $drawingString = iconv('UTF-8', 'UTF-16BE//IGNORE', $text);

        $characters    = array();

        for ($i = 0; $i < strlen($drawingString); $i ++) {

            $characters[] = (ord($drawingString[$i ++]) << 8) | ord($drawingString[$i]);

        }

        $glyphs = $font->glyphNumbersForCharacters($characters);

        $widths = $font->widthsForGlyphs($glyphs);

        $stringWidth = (array_sum($widths) / $font->getUnitsPerEm()) * $fontSize;

        return $stringWidth;

    }

}