Ejemplos de Mike42\Escpos Printer::dataHeader en PHP

dataHeader() private static method

Convert widths and heights to characters. Used before sending graphics to set the size.

private static dataHeader ( array $inputs, boolean $long = true ) : string
$inputs	array
$long	boolean	True to use 4 bytes, false to use 2
return	string

Ejemplo n.º 1

Archivo: Printer.php Proyecto: mike42/escpos-php

 /**
  * Print an image to the printer.
  *
  * Size modifiers are:
  * - Printer::IMG_DEFAULT (leave image at original size)
  * - Printer::IMG_DOUBLE_WIDTH
  * - Printer::IMG_DOUBLE_HEIGHT
  *
  * See the example/ folder for detailed examples.
  *
  * The functions bitImage() and bitImageColumnFormat() take the same
  * parameters, and can be used if your printer doesn't support the newer
  * graphics commands.
  *
  * @param EscposImage $img The image to print.
  * @param int $size Size modifier for the image. Must be either `Printer::IMG_DEFAULT`
  *  (default), or any combination of the `Printer::IMG_DOUBLE_HEIGHT` and
  *  `Printer::IMG_DOUBLE_WIDTH` flags.
  */
 public function graphics(EscposImage $img, $size = Printer::IMG_DEFAULT)
 {
     self::validateInteger($size, 0, 3, __FUNCTION__);
     $rasterData = $img->toRasterFormat();
     $imgHeader = Printer::dataHeader(array($img->getWidth(), $img->getHeight()), true);
     $tone = '0';
     $colors = '1';
     $xm = ($size & self::IMG_DOUBLE_WIDTH) == Printer::IMG_DOUBLE_WIDTH ? chr(2) : chr(1);
     $ym = ($size & self::IMG_DOUBLE_HEIGHT) == Printer::IMG_DOUBLE_HEIGHT ? chr(2) : chr(1);
     $header = $tone . $xm . $ym . $colors . $imgHeader;
     $this->wrapperSendGraphicsData('0', 'p', $header . $rasterData);
     $this->wrapperSendGraphicsData('0', '2');
 }