php - wideimage lib - 无法让 resizeCanvas() 工作

Question

我想制作一个白色正方形，在其中将图像居中，但问题是我得到了没有白色画布的图像。我取回了我上传的相同图像（未处理）。

$image = WideImage::loadFromFile(FILE_DIR."tmp/".$img);
$h = $image->getHeight();
$w = $image->getWidth();
$biggestLength = max($w, $h);
$white = $image->allocateColor(255, 255, 255);
$image->resizeCanvas($biggestLength, $biggestLength, 'center', 'center', $white);
$image->saveToFile(FILE_DIR."tmp/canvas.jpg");

http://wideimage.sourceforge.net/wp-content/current/doc/WideImage/WideImage_Image.html#methodresizeCanvas

Answer 1

将第 6 行更改为

$image = $image->resizeCanvas($biggestLength, $biggestLength, 'center', 'center', $white);