100 lines
2.6 KiB
PHP
100 lines
2.6 KiB
PHP
<?php
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namespace App\Helpers;
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use App\AlbumSources\IAlbumSource;
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use App\Photo;
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class ImageHelper
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{
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public function generateThumbnail($gdImageResource, Photo $photo, $thumbnailInfo)
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{
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$thumbnailWidth = intval($thumbnailInfo['width']);
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$thumbnailHeight = intval($thumbnailInfo['height']);
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// If image is portrait, restrict the height by the relevant aspect ratio
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if ($photo->height > $photo->width)
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{
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$aspectRatio = $photo->height / $photo->width;
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$thumbnailWidth = intval($thumbnailInfo['height']) / $aspectRatio;
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$thumbnailHeight = intval($thumbnailInfo['height']);
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}
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$thumbnailImageResource = imagecreatetruecolor($thumbnailWidth, $thumbnailHeight);
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imagecopyresized(
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$thumbnailImageResource,
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$gdImageResource,
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0,
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0,
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0,
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0,
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$thumbnailWidth,
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$thumbnailHeight,
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$photo->width,
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$photo->height
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);
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// TODO make the /tmp folder configurable
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$tempName = tempnam('/tmp', 'btw_thumb_');
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$tempNameWithExtension = ($tempName . '.jpg');
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rename($tempName, $tempNameWithExtension);
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// TODO make thumbnail quality configurable
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imagejpeg($thumbnailImageResource, $tempNameWithExtension, 90);
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return $tempNameWithExtension;
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}
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public function openImage($imagePath, &$imageInfo)
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{
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$imageInfo = getimagesize($imagePath);
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if ($imageInfo === false)
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{
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throw new \Exception(sprintf('The image "%s" does not appear to be a valid image, or cannot be read', pathinfo($imagePath, PATHINFO_FILENAME)));
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}
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$im = false;
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$type = $imageInfo[2];
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$allowedTypes = [
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IMG_GIF,
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IMG_PNG,
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IMG_JPEG,
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IMG_WBMP
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];
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if (!in_array($type, $allowedTypes))
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{
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return false;
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}
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switch ($type)
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{
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case IMG_GIF:
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$im = imagecreatefromgif($imagePath);
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break;
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case IMG_JPEG:
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$im = imagecreatefromjpeg($imagePath);
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break;
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case IMG_PNG:
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$im = imagecreatefrompng($imagePath);
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break;
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case IMG_WBMP:
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$im = imagecreatefromwbmp($imagePath);
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break;
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}
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return $im;
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}
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public function rotateImage($imageResource, $angle)
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{
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imagesetinterpolation($imageResource, IMG_SINC);
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return imagerotate($imageResource, $angle, 0);
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}
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} |