<?php
/*
 * PHP QR Code encoder
 *
 * Image output of code using GD2
 *
 * PHP QR Code is distributed under LGPL 3
 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
define('QR_IMAGE', true);
class QRimage
{

    //----------------------------------------------------------------------
    public static function png($frame, $filename = false, $pixelPerPoint = 4, $outerFrame = 4, $saveandprint = FALSE)
    {
        $image = self::image($frame, $pixelPerPoint, $outerFrame);
        if ($filename === false) {
            Header("Content-type: image/png");
            ImagePng($image);
        } else {
            if ($saveandprint === TRUE) {
                ImagePng($image, $filename);
                header("Content-type: image/png");
                ImagePng($image);
            } else {
                ImagePng($image, $filename);
            }
        }
        ImageDestroy($image);
    }

    //----------------------------------------------------------------------
    public static function jpg($frame, $filename = false, $pixelPerPoint = 8, $outerFrame = 4, $q = 85)
    {
        $image = self::image($frame, $pixelPerPoint, $outerFrame);
        if ($filename === false) {
            Header("Content-type: image/jpeg");
            ImageJpeg($image, null, $q);
        } else {
            ImageJpeg($image, $filename, $q);
        }
        ImageDestroy($image);
    }

    //----------------------------------------------------------------------
    private static function image($frame, $pixelPerPoint = 4, $outerFrame = 4)
    {
        $h          = count($frame);
        $w          = strlen($frame[0]);
        $imgW       = $w + 2 * $outerFrame;
        $imgH       = $h + 2 * $outerFrame;
        $base_image = ImageCreate($imgW, $imgH);
        $col[0]     = ImageColorAllocate($base_image, 255, 255, 255);
        $col[1]     = ImageColorAllocate($base_image, 0, 0, 0);
        imagefill($base_image, 0, 0, $col[0]);
        for ($y = 0; $y < $h; $y++) {
            for ($x = 0; $x < $w; $x++) {
                if ($frame[$y][$x] == '1') {
                    ImageSetPixel($base_image, $x + $outerFrame, $y + $outerFrame, $col[1]);
                }
            }
        }
        $target_image = ImageCreate($imgW * $pixelPerPoint, $imgH * $pixelPerPoint);
        ImageCopyResized($target_image, $base_image, 0, 0, 0, 0, $imgW * $pixelPerPoint, $imgH * $pixelPerPoint, $imgW, $imgH);
        ImageDestroy($base_image);

        return $target_image;
    }
}