117 lines
2.5 KiB
PHP
117 lines
2.5 KiB
PHP
<?php
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/**
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* This class will be able to convert a file into an image.
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* @author JPT
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*/
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class FileImageConverter {
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/**
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* @var BoxImage
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*/
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protected $image;
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/**
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* @var CharColorConverter
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*/
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protected $colorConverter;
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/**
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* Default constructor
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* @return void
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*/
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public function __construct() {
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$this->colorConverter = new CharColorConverter();
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}
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/**
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* Processes the given file, returns the filename of the resulting PNG-File.
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* @param string $filename
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* @return void
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* @throws Exception
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*/
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public function convertFile($filename) {
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if(file_exists($filename) === FALSE) throw new Exception("Invalid filename given!");
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//get file data
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$filesize = filesize($filename);
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$md5 = md5_file($filename);
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$new_filename = "result.png";
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$header = "";
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for($i = 0;$i < 255;$i += 5) {
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$header .= chr($i);
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}
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$header .= chr(0);
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$header .= $filesize;
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$header .= chr(0);
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$header .= $md5;
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//header done, now read the file content
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$content = file_get_contents($filename);
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//get size for the image
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$size = strlen($header) + 1 + $filesize;
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//create and prepare image
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$this->image = new BoxImage($size);
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$this->image->fillImage(0,0,0,127);
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//header first
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$this->addDataToImage($header);
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//magic pixel
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$this->image->setCurrentPixel(0,0,0,127);
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$this->image->movePointer(1);
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//content
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$this->addDataToImage($content);
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//save image
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$this->image->writeToFile($new_filename, 0);
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//clean up
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unset($this->image);
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}
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/**
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* Converts data and adds it to the image.
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* @param string $data
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* @return void
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*/
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protected function addDataToImage($data) {
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try {
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$strlen = strlen($data);
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for($i = 0;$i < $strlen; $i++) {
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$char = substr($data, $i, 1);
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//convert char to color
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list($r, $g, $b) = $this->colorConverter->charToColor($char);
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//set the pixel
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$this->image->setCurrentPixel($r, $g, $b, 0);
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//move the pointer
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$this->image->movePointer(1);
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$this->progressBar($i, $strlen);
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}
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} catch (Exception $e) {
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//TODO: handle weird shit?
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echo "Caught Exception:\n";
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echo $e;
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}
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echo "\rDone.\n";
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}
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/**
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* Displays a simple progressbar using \r
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* @param int $x
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* @param int $total
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* @return void
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*/
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protected function progressBar($x, $total) {
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$percent = round($x / $total * 100, 2);
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echo " \r";
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echo "Working... " . $percent . " %";
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}
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}
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?>
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