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N°3124 - Refactorize ResizeImageToFit methods (#734)

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Timmy38
2025-08-08 10:43:35 +02:00
committed by GitHub
parent 5b9e0a1d4f
commit 71386198cf
7 changed files with 227 additions and 190 deletions
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91
application/utils.inc.php
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@@ -2312,97 +2312,6 @@ SQL;
return @getimagesizefromstring($sImageData);
}
/**
* Resize an image attachment so that it fits in the given dimensions
* @param ormDocument $oImage The original image stored as an ormDocument
* @param int $iWidth Image's original width
* @param int $iHeight Image's original height
* @param int $iMaxImageWidth Maximum width for the resized image
* @param int $iMaxImageHeight Maximum height for the resized image
* @return ormDocument The resampled image
*/
public static function ResizeImageToFit(ormDocument $oImage, $iWidth, $iHeight, $iMaxImageWidth, $iMaxImageHeight)
{
// If image size smaller than maximums, we do nothing
if (($iWidth <= $iMaxImageWidth) && ($iHeight <= $iMaxImageHeight))
{
return $oImage;
}
// If gd extension is not loaded, we put a warning in the log and return the image as is
if (extension_loaded('gd') === false)
{
IssueLog::Warning('Image could not be resized as the "gd" extension does not seem to be loaded. It will remain as ' . $iWidth . 'x' . $iHeight . ' instead of ' . $iMaxImageWidth . 'x' . $iMaxImageHeight);
return $oImage;
}
switch($oImage->GetMimeType())
{
case 'image/gif':
case 'image/jpeg':
case 'image/png':
$img = @imagecreatefromstring($oImage->GetData());
break;
default:
// Unsupported image type, return the image as-is
//throw new Exception("Unsupported image type: '".$oImage->GetMimeType()."'. Cannot resize the image, original image will be used.");
return $oImage;
}
if ($img === false)
{
//throw new Exception("Warning: corrupted image: '".$oImage->GetFileName()." / ".$oImage->GetMimeType()."'. Cannot resize the image, original image will be used.");
return $oImage;
}
else
{
// Let's scale the image, preserving the transparency for GIFs and PNGs
$fScale = min($iMaxImageWidth / $iWidth, $iMaxImageHeight / $iHeight);
$iNewWidth = $iWidth * $fScale;
$iNewHeight = $iHeight * $fScale;
$new = imagecreatetruecolor($iNewWidth, $iNewHeight);
// Preserve transparency
if(($oImage->GetMimeType() == "image/gif") || ($oImage->GetMimeType() == "image/png"))
{
imagecolortransparent($new, imagecolorallocatealpha($new, 0, 0, 0, 127));
imagealphablending($new, false);
imagesavealpha($new, true);
}
imagecopyresampled($new, $img, 0, 0, 0, 0, $iNewWidth, $iNewHeight, $iWidth, $iHeight);
ob_start();
switch ($oImage->GetMimeType())
{
case 'image/gif':
imagegif($new); // send image to output buffer
break;
case 'image/jpeg':
imagejpeg($new, null, 80); // null = send image to output buffer, 80 = good quality
break;
case 'image/png':
imagepng($new, null, 5); // null = send image to output buffer, 5 = medium compression
break;
}
$oResampledImage = new ormDocument(ob_get_contents(), $oImage->GetMimeType(), $oImage->GetFileName());
@ob_end_clean();
imagedestroy($img);
imagedestroy($new);
return $oResampledImage;
}
}
/**
* Create a 128 bit UUID in the format: {########-####-####-####-############}
*