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<?php /** * @package Joomla * @subpackage Fabrik.image * @copyright Copyright (C) 2005-2020 Media A-Team, Inc. - All rights reserved. * @license GNU/GPL http://www.gnu.org/copyleft/gpl.html / namespace Fabrik\Helpers\Image; defined('_JEXEC') or die('Restricted access'); use Joomla\CMS\Factory; use Joomla\CMS\HTML\HTMLHelper; use Joomla\CMS\Filesystem\File; use Fabrik\Helpers\StringHelper; /* * GD image manipulation class * * @package Joomla * @subpackage Fabrik.helpers * @copyright Copyright (C) 2005-2020 Media A-Team, Inc. - All rights reserved. * @license GNU/GPL http://www.gnu.org/copyleft/gpl.html * @since 1.0 / class Imagegd extends Image { /* * Create an image object from a file path * * @param string $file file to create image from * * @throws \Exception * * @return array (image, header string) / public function imageFromFile($file) { $fromFile = $this->storage->preRenderPath($file); // Load image $img = null; $ext = $this->getImgType($fromFile); if (!$ext) { return array(false, false); } ini_set('display_errors', true); $memory = \FabrikWorker::getMemoryLimit(true); $intMemory = \FabrikWorker::getMemoryLimit(); if ($intMemory < (64 1024 * 1024)) { ini_set('memory_limit', '50M'); } if ($ext == 'jpg' \|\| $ext == 'jpeg') { $img = @imagecreatefromjpeg($fromFile); $header = "image/jpeg"; } elseif ($ext == 'png') { $img = @imagecreatefrompng($fromFile); $header = "image/png"; // Only if your version of GD includes GIF support } elseif ($ext == 'gif') { if (function_exists('imagecreatefromgif')) { $img = @imagecreatefromgif($fromFile); $header = "image/gif"; } else { throw new \Exception("imagecreate from gif not available"); } } if ($intMemory < (64 * 1024 * 1024)) { ini_set('memory_limit', $memory); } return array($img, $header); } /** * Create a gd image from a file * * @param string $source path to file * * @return image / protected function imageCreateFrom($source) { $ext = StringHelper::strtolower(File::getExt($source)); switch ($ext) { case 'jpg': case 'jpeg': $source = imagecreatefromjpeg($source); break; case 'png': $source = imagecreatefrompng($source); break; case 'gif': $source = imagecreatefromgif($source); break; } return $source; } /* * Convert an image object into a file * * @param string $destCropFile file path * @param object $image image object to save * * @return bool True on success / public function imageToFile($destCropFile, $image) { $ext = StringHelper::strtolower(File::getExt($destCropFile)); ob_start(); switch ($ext) { case 'jpg': case 'jpeg': $source = imagejpeg($image, null, 100); break; case 'png': $source = imagepng($image, null); break; case 'gif': $source = imagegif($image, null); break; } $image_p = ob_get_contents(); ob_end_clean(); return $this->storage->write($destCropFile, $image_p); } /* * Rotate an image * * @param string $source filepath * @param string $dest output path, if empty defaults to source * @param int $degrees number of degrees to rotate * * @return array (image object, rotated images width, rotated images height) / public function rotate($source, $dest = '', $degrees = 0) { if (empty($dest)) { $dest = $source; } $source = $this->imageCreateFrom($source); $app = Factory::getApplication(); // Rotates the image $rotate = imagerotate($source, $degrees, 0); if ($rotate === false) { $app->enqueueMessage('Image rotation failed', 'notice'); } $this->imageToFile($dest, $rotate); list($width, $height) = getimagesize($dest); return array($rotate, $width, $height); } / * Check for EXIF orientation data, and rotate image accordingly * * @param string path to image file / public function rotateImageFromExif($src, $dest) { if (function_exists('exif_read_data')) { $exif = exif_read_data($src); if ($exif && isset($exif['Orientation'])) { $orientation = $exif['Orientation']; if ($orientation != 1) { $deg = 0; switch ($orientation) { case 3: $deg = 180; break; case 6: $deg = 270; break; case 8: $deg = 90; break; } if ($deg) { self::rotate($src, $dest, $deg); } } } } } /* * Scale an image * * @param string $file file to scale * @param string $dest save location * @param int $percentage scale percentage * @param int $destX start scale from x coord * @param int $destY start scale from y coord * * @return object image / public function scale($file, $dest = '', $percentage = 100, $destX = 0, $destY = 0) { list($image, $header) = $this->imageFromFile($file); jimport('joomla.filesystem.file'); list($width, $height) = getimagesize($file); $new_width = $width ((float) $percentage / 100); $new_height = $height * ((float) $percentage / 100); $image_p = imagecreatetruecolor($new_width, $new_height); imagecopyresampled($image_p, $image, $destX, $destY, 0, 0, $new_width, $new_height, $width, $height); if ($dest != '') { $this->imageToFile($dest, $image_p); } return $image_p; } /** * Resize an image to a specific width/height * * @param int $maxWidth maximum image Width (px) * @param int $maxHeight maximum image Height (px) * @param string $origFile current images folder path (must have trailing end slash) * @param string $destFile destination folder path for resized image (must have trailing end slash) * @param int $quality Percentage image save quality 100 = no compression, 0 = max compression * * @throws Error * * @return object image / public function resize($maxWidth, $maxHeight, $origFile, $destFile, $quality = 100) { // Check if the file exists if (!$this->storage->exists($origFile)) { throw new RuntimeException("Fabrik: no file found for $origFile"); } // Load image list($img, $header) = $this->imageFromFile($origFile); if (!$img) { return $img; } $ext = StringHelper::strtolower(end(explode('.', $origFile))); // If an image was successfully loaded, test the image for size if ($img) { // Handle image transparency for original image if (function_exists('imagealphablending')) { imagealphablending($img, false); imagesavealpha($img, true); } // Get image size and scale ratio $width = imagesx($img); $height = imagesy($img); $scale = min($maxWidth / $width, $maxHeight / $height); // If the image is larger than the max shrink it if ($scale < 1) { $new_width = floor($scale $width); $new_height = floor($scale * $height); // Create a new temporary image $tmp_img = imagecreatetruecolor($new_width, $new_height); // Handle image transparency for resized image if (function_exists('imagealphablending')) { imagealphablending($tmp_img, false); imagesavealpha($tmp_img, true); } // Copy and resize old image into new image imagecopyresampled($tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height); imagedestroy($img); $img = $tmp_img; } } // Create error image if necessary if (!$img) { throw new Error("resize: no image created for $origFile, extension = $ext, destination = $destFile"); } // Save the file $this->writeImg($img, $destFile, $header, $quality); $this->thumbPath = $destFile; } /** * Crop an image to specific dimensions * * @param string $origFile path to image to crop from * @param string $destFile path to cropped file * @param int $srcX x coord on $origFile to start crop from * @param int $srcY y coord on $origFile to start crop from * @param int $dstW cropped image width * @param int $dstH cropped image height * @param int $dstX destination x coord of destination point * @param int $dstY destination y coord of destination point * @param string $bg hex background colour * * @return void / public function crop($origFile, $destFile, $srcX, $srcY, $dstW, $dstH, $dstX = 0, $dstY = 0, $bg = '#FFFFFF') { // Convert hex to rgb colours. list($r, $g, $b) = sscanf($bg, '#%2x%2x%2x'); list($origImg, $header) = $this->imageFromFile($origFile); $destImg = imagecreatetruecolor($dstW, $dstH); $bg = imagecolorallocate($destImg, $r, $g, $b); // Draw a bg rectangle imagefilledrectangle($destImg, 0, 0, (int) $dstW, (int) $dstH, $bg); $this->writeImg($destImg, $destFile, $header); $srcW = imagesx($destImg); $srcH = imagesy($destImg); $origW = imagesx($origImg); $origH = imagesy($origImg); // If the orig image is smaller than the destination then increase its canvas and fill it with the bg if ($origW < $srcW \|\| $origH < $srcH) { $srcBg = imagecreatetruecolor($srcW, $srcH); imagefilledrectangle($srcBg, 0, 0, (int) $srcW, (int) $srcH, $bg); imagecopyresampled($srcBg, $origImg, 0, 0, 0, 0, $origW, $origH, $origW, $origH); $origImg = $srcBg; } imagecopyresampled($destImg, $origImg, $dstX, $dstY, $srcX, $srcY, $dstW, $dstH, $srcW, $srcH); $this->writeImg($destImg, $destFile, $header); } /* * Write an image to the server * * @param object $img image object * @param string $destFile file path to save to * @param string $header image type * @param int $quality Percentage image save quality 100 = no compression, 0 = max compression * * @throws Error * * @return void / public function writeImg($img, $destFile, $header, $quality = 100) { if ($quality < 0) { $quality = 0; } if ($quality > 100) { $quality = 100; } if ($header == "image/jpeg") { ob_start(); imagejpeg($img, null, $quality); $image = ob_get_contents(); ob_end_clean(); $this->storage->write($destFile, $image); } else { if ($header == "image/png") { $quality = round((100 - $quality) 9 / 100); ob_start(); imagepng($img, null, $quality); $image = ob_get_contents(); ob_end_clean(); $this->storage->write($destFile, $image); } else { if (function_exists("imagegif")) { ob_start(); imagegif($img, null, $quality); $image = ob_get_contents(); ob_end_clean(); $this->storage->write($destFile, $image); } else { throw new Error('trying to save a gif by imagegif support not present in the GD library'); } } } } }

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