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119 lines
3.9 KiB
119 lines
3.9 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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require( '../../../config.php');
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$id = required_param('id', PARAM_INT); // Course Module ID.
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$attemptid = required_param('id2', PARAM_INT); // Course Module ID.
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$foundcells = required_param('f', PARAM_SEQUENCE); // CSV.
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$cells = required_param('cells', PARAM_SEQUENCE); // CSV.
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$filehash = required_param('p', PARAM_PATH);
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$cols = required_param('cols', PARAM_INT);
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$rows = required_param('rows', PARAM_INT);
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$filenamenumbers = required_param('n', PARAM_PATH); // Path to numbers picture.
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create_image( $id, $attemptid, $foundcells, $cells, $filehash, $cols, $rows, $filenamenumbers);
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function create_image( $id, $attemptid, $foundcells, $cells, $filehash, $cols, $rows, $filenamenumbers) {
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global $CFG;
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$a = explode( ',', $foundcells);
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$found = array();
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foreach ($a as $s) {
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$found[ $s] = 1;
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}
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$a = explode( ',', $cells);
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$cells = array();
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foreach ($a as $s) {
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$cells[ $s] = 1;
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}
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$file = get_file_storage()->get_file_by_hash( $filehash);
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$image = $file->get_imageinfo();
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if ($image === false) {
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die("Aknown filehash $filehash");
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return false;
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}
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$imghandle = imagecreatefromstring($file->get_content());
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$mime = $image[ 'mimetype'];
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$imgnumbers = imagecreatefrompng( $filenamenumbers);
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$sizenumbers = getimagesize ($filenamenumbers);
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header("Content-type: $mime");
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$color = imagecolorallocate( $imghandle, 100, 100, 100);
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$width = $image[ 'width'];
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$height = $image[ 'height'];
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$pos = 0;
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$font = 1;
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for ($y = 0; $y < $rows; $y++) {
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for ($x = 0; $x < $cols; $x++) {
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$pos++;
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if (!array_key_exists( $pos, $found)) {
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$x1 = $x * $width / $cols;
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$y1 = $y * $height / $rows;
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imagefilledrectangle( $imghandle, $x1, $y1, $x1 + $width / $cols, $y1 + $height / $rows, $color);
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if (array_key_exists( $pos, $cells)) {
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shownumber( $imghandle, $imgnumbers, $pos, $x1 , $y1, $width / $cols, $height / $rows, $sizenumbers);
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}
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}
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}
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}
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switch ($mime) {
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case 'image/png':
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imagepng ($imghandle);
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break;
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case 'image/jpeg':
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imagejpeg ($imghandle);
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break;
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case 'image/gif':
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imagegif ($imghandle);
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break;
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default:
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die('Aknown mime type $mime');
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return false;
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}
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imagedestroy ($imghandle);
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}
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function shownumber( $imghandle, $imgnumbers, $number, $x1 , $y1, $width, $height, $sizenumbers) {
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if ($number < 10) {
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$widthnumber = $sizenumbers[ 0] / 10;
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$dstx = $x1 + $width / 3;
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$dsty = $y1 + $height / 3;
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$srcx = $number * $sizenumbers[ 0] / 10;
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$srcw = $sizenumbers[ 0] / 10;
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$srch = $sizenumbers[ 1];
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$dstw = $width / 10;
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$dsth = $dstw * $srch / $srcw;
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imagecopyresized( $imghandle, $imgnumbers, $dstx, $dsty, $srcx, 0, $dstw, $dsth, $srcw, $srch);
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} else {
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$number1 = floor( $number / 10);
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$number2 = $number % 10;
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shownumber( $imghandle, $imgnumbers, $number1, $x1 - $width / 20, $y1, $width, $height, $sizenumbers);
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shownumber( $imghandle, $imgnumbers, $number2, $x1 + $width / 20, $y1, $width, $height, $sizenumbers);
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}
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}
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