57 lines
1.7 KiB
PHP
57 lines
1.7 KiB
PHP
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<?php
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if ((isset($_GET['id']) && is_numeric($_GET['id'])) === FALSE) die;
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if (!function_exists('getimagesizefromstring')) {
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function getimagesizefromstring($string_data)
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{
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$uri = 'data://application/octet-stream;base64,' . base64_encode($string_data);
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return getimagesize($uri);
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}
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}
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include "images.php";
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$imageId = $_GET['id'];
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$image = Images::GetImage($imageId);
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// get the source image attributes
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$srcImage = $image->image;
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$srcSize = getImageSizeFromString($srcImage);
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$srcWidth = $srcSize[0];
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$srcHeight = $srcSize[1];
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$srcType = $srcSize[2];
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$srcMime = $srcSize['mime'];
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$srcImageResource = imageCreateFromString($srcImage);
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// set the header for the image
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header("Content-type: ".$srcMime);
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if ((isset($_GET['width']) && is_numeric($_GET['width'])) === FALSE) {
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// no width requested - just return the source
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echo $srcImage;
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exit;
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}
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// resize/resample the image to the requested size
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$destWidth = $_GET['width'];
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$destHeight = $destWidth * $srcSize[1] / $srcSize[0];
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$destImageResource = imageCreateTrueColor($destWidth, $destHeight);
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imagealphablending($destImageResource, false);
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imagesavealpha($destImageResource, true);
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imageCopyResampled($destImageResource, $srcImageResource, 0,0,0,0, $destWidth, $destHeight, $srcWidth, $srcHeight);
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// export the image
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switch ($srcType) {
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case IMAGETYPE_JPEG:
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imageJPEG($destImageResource);
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break;
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case IMAGETYPE_PNG:
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imagePNG($destImageResource);
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break;
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default:
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imageJPEG($destImageResource);
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break;
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}
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imageDestroy($destImageResource);
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?>
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