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<?php
/**
* @see https://github.com/zendframework/zend-barcode for the canonical source repository
* @copyright Copyright (c) 2005-2019 Zend Technologies USA Inc. (http://www.zend.com)
* @license https://github.com/zendframework/zend-barcode/blob/master/LICENSE.md New BSD License
*/
namespace Zend\Barcode\Renderer;
use ZendPdf\Color;
use ZendPdf\Font;
use ZendPdf\Page;
use ZendPdf\PdfDocument;
/**
* Class for rendering the barcode in PDF resource
*/
class Pdf extends AbstractRenderer
{
/**
* PDF resource
* @var PdfDocument
*/
protected $resource = null;
/**
* Page number in PDF resource
* @var int
*/
protected $page = 0;
/**
* Module size rendering
* @var float
*/
protected $moduleSize = 0.5;
/**
* Set a PDF resource to draw the barcode inside
*
* @param PdfDocument $pdf
* @param int $page
* @return self Provides a fluent interface
*/
public function setResource(PdfDocument $pdf, $page = 0)
{
$this->resource = $pdf;
$this->page = intval($page);
if (! count($this->resource->pages)) {
$this->page = 0;
$this->resource->pages[] = new Page(
Page::SIZE_A4
);
}
return $this;
}
/**
* Check renderer parameters
*
* @return void
*/
protected function checkSpecificParams()
{
}
/**
* 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 PdfDocument();
$this->resource->pages[] = new Page(
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 int $color
* @param bool $filled
*/
protected function drawPolygon($points, $color, $filled = true)
{
$page = $this->resource->pages[$this->page];
$x = [];
$y = [];
foreach ($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);
}
}
$color = new Color\Rgb(
(($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)
? Page::SHAPE_DRAW_FILL_AND_STROKE
: Page::SHAPE_DRAW_STROKE;
$page->drawPolygon($x, $y, $fillType);
}
/**
* Draw a polygon in the rendering resource
* @param string $text
* @param float $size
* @param array $position
* @param string $font
* @param int $color
* @param string $alignment
* @param float $orientation
*/
protected function drawText(
$text,
$size,
$position,
$font,
$color,
$alignment = 'center',
$orientation = 0
) {
$page = $this->resource->pages[$this->page];
$color = new Color\Rgb(
(($color & 0xFF0000) >> 16) / 255.0,
(($color & 0x00FF00) >> 8) / 255.0,
($color & 0x0000FF) / 255.0
);
$page->setLineColor($color);
$page->setFillColor($color);
$page->setFont(Font::fontWithPath($font), $size * $this->moduleSize * 1.2);
$width = $this->widthForStringUsingFontSize(
$text,
Font::fontWithPath($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 Font $font
* @param float $fontSize
* @return float
*/
public function widthForStringUsingFontSize($text, $font, $fontSize)
{
$drawingString = iconv('UTF-8', 'UTF-16BE//IGNORE', $text);
$characters = [];
for ($i = 0, $len = strlen($drawingString); $i < $len; $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;
}
}