/**
* Load a PDF for use on the printer
*
* @param string $pdfFile The file to load
* @param string $pageWidth The width, in pixels, of the printer's output. The first page of the PDF will be scaled to approximately fit in this area.
* @param array $range array indicating the first and last page (starting from 0) to load. If not set, the entire document is loaded.
* @throws Exception Where Imagick is not loaded, or where a missing file or invalid page number is requested.
* @return multitype:EscposImage Array of images, retrieved from the PDF file.
*/
public static function loadPdf($pdfFile, $pageWidth = 550, array $range = null)
{
if (!extension_loaded('imagick')) {
throw new Exception(__FUNCTION__ . " requires imagick extension.");
}
/*
* Load first page at very low density (resolution), to figure out what
* density to use to achieve $pageWidth
*/
try {
$image = new Imagick();
$testRes = 2;
// Test resolution
$image->setresolution($testRes, $testRes);
$image->readimage($pdfFile . "[0]");
$geo = $image->getimagegeometry();
$image->destroy();
$width = $geo['width'];
$newRes = $pageWidth / $width * $testRes;
/* Load actual document (can be very slow!) */
$rangeStr = "";
// Set to [0] [0-1] page range if $range is set
if ($range != null) {
if (count($range) != 2 || !isset($range[0]) || !is_integer($range[0]) || !isset($range[1]) || !is_integer($range[1]) || $range[0] > $range[1]) {
throw new Exception("Invalid range. Must be two numbers in the array: The start and finish page indexes, starting from 0.");
}
$rangeStr = "[" . ($range[0] == $range[1] ? $range[0] : implode($range, "-")) . "]";
}
$image->setresolution($newRes, $newRes);
$image->readImage($pdfFile . "{$rangeStr}");
$pages = $image->getNumberImages();
/* Convert images to Escpos objects */
$ret = array();
for ($i = 0; $i < $pages; $i++) {
$image->setIteratorIndex($i);
$ep = new EscposImage();
$ep->readImageFromImagick($image);
$ret[] = $ep;
}
return $ret;
} catch (ImagickException $e) {
// Wrap in normal exception, so that classes which call this do not themselves require imagick as a dependency.
throw new Exception($e);
}
}
function writeText($text)
{
if ($this->printer == null) {
throw new LogicException("Not attached to a printer.");
}
if ($text == null) {
return;
}
$text = trim($text, "\n");
/* Create Imagick objects */
$image = new Imagick();
$draw = new ImagickDraw();
$color = new ImagickPixel('#000000');
$background = new ImagickPixel('white');
/* Create annotation */
//$draw -> setFont('Arial');// (not necessary?)
$draw->setFontSize(24);
// Size 21 looks good for FONT B
$draw->setFillColor($color);
$draw->setStrokeAntialias(true);
$draw->setTextAntialias(true);
$metrics = $image->queryFontMetrics($draw, $text);
$draw->annotation(0, $metrics['ascender'], $text);
/* Create image & draw annotation on it */
$image->newImage($metrics['textWidth'], $metrics['textHeight'], $background);
$image->setImageFormat('png');
$image->drawImage($draw);
//$image -> writeImage("test.png");
/* Save image */
$escposImage = new EscposImage();
$escposImage->readImageFromImagick($image);
$size = Escpos::IMG_DEFAULT;
$this->printer->bitImage($escposImage, $size);
}