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107 lines
3.3 KiB
107 lines
3.3 KiB
<?php // $Id: picture.php,v 1.3 2010/07/26 00:13:32 bdaloukas Exp $
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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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{
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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 $filehash");
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return false;
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}
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$img_handle = imagecreatefromstring($file->get_content());
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$mime = $image[ 'mimetype'];
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$img_numbers = imageCreateFromPNG( $filenamenumbers);
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$size_numbers = getimagesize ($filenamenumbers);
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Header ("Content-type: $mime");
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$color = ImageColorAllocate ($img_handle, 100, 100, 100);
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$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( $img_handle, $x1, $y1, $x1 + $width / $cols, $y1 + $height / $rows, $color);
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if( array_key_exists( $pos, $cells)){
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shownumber( $img_handle, $img_numbers, $pos, $x1 , $y1, $width / $cols, $height / $rows, $size_numbers);
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}
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}
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}
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}
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switch( $mime){
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case 'image/png':
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ImagePng ($img_handle);
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break;
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case 'image/jpeg':
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ImageJpeg ($img_handle);
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break;
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case 'image/gif':
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ImageGif ($img_handle);
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break;
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default:
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die('Aknown mime type $mime');
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return false;
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}
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ImageDestroy ($img_handle);
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}
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function shownumber( $img_handle, $img_numbers, $number, $x1 , $y1, $width, $height, $size_numbers){
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if( $number < 10){
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$width_number = $size_numbers[ 0] / 10;
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$dstX = $x1 + $width / 3;
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$dstY = $y1 + $height / 3;
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$srcX = $number * $size_numbers[ 0] / 10;
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$srcW = $size_numbers[ 0]/10;
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$srcH = $size_numbers[ 1];
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$dstW = $width / 10;
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$dstH = $dstW * $srcH / $srcW;
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imagecopyresized( $img_handle, $img_numbers, $dstX, $dstY, $srcX, 0, $dstW, $dstH, $srcW, $srcH);
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}else
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{
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$number1 = floor( $number / 10);
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$number2 = $number % 10;
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shownumber( $img_handle, $img_numbers, $number1, $x1-$width/20, $y1, $width, $height, $size_numbers);
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shownumber( $img_handle, $img_numbers, $number2, $x1+$width/20, $y1, $width, $height, $size_numbers);
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}
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}
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