我有这个公共功能:
public function resize($width, $height)
{
$newImage = imagecreatetruecolor($width, $height);
if($this->_imageType == IMAGETYPE_PNG && $this->_transparent === true){
imagealphablending($newImage, false);
imagesavealpha($newImage, true);
imagefilledrectangle($newImage, 0, 0, $width, $height, imagecolorallocatealpha($newImage, 255, 255, 255, 127));
}
imagecopyresampled($newImage, $this->_image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
$this->_image = $newImage;
}
预览图像时出现我的问题。它不显示 alpha 颜色。我能得到一些帮助吗?