【发布时间】:2021-07-04 04:30:06
【问题描述】:
目前,我正在使用 PHP 的 resize_crop_image 在我的服务器上调整头像的大小。下面的代码拍摄一张图片,裁剪并调整其大小,使其正好是 500px X 500px 正方形。
resize_crop_image(500, 500, $filename, $filename);
但我想将此过程从服务器转移到颤振应用程序。我在 pub.dev 上看到的大多数插件都过度使用用户使用裁剪工具裁剪图像。但我希望这个函数能够像我目前在 PHP 中那样自动发生。
这里是 resize_crop_image 代码;
function resize_crop_image($max_width, $max_height, $source_file, $dst_dir, $quality = 100){
$imgsize = getimagesize($source_file);
$width = $imgsize[0];
$height = $imgsize[1];
$mime = $imgsize['mime'];
switch($mime){
case 'image/gif':
$image_create = "imagecreatefromgif";
$image = "imagegif";
break;
case 'image/png':
$image_create = "imagecreatefrompng";
$image = "imagepng";
$quality = 10;
break;
case 'image/jpeg':
$image_create = "imagecreatefromjpeg";
$image = "imagejpeg";
$quality = 100;
break;
default:
return false;
break;
}
$dst_img = imagecreatetruecolor($max_width, $max_height);
$src_img = $image_create($source_file);
$width_new = $height * $max_width / $max_height;
$height_new = $width * $max_height / $max_width;
//if the new width is greater than the actual width of the image, then the height is too large and the rest cut off, or vice versa
if($width_new > $width){
//cut point by height
$h_point = (($height - $height_new) / 2);
//copy image
imagecopyresampled($dst_img, $src_img, 0, 0, 0, $h_point, $max_width, $max_height, $width, $height_new);
}else{
//cut point by width
$w_point = (($width - $width_new) / 2);
imagecopyresampled($dst_img, $src_img, 0, 0, $w_point, 0, $max_width, $max_height, $width_new, $height);
}
$image($dst_img, $dst_dir, $quality);
if($dst_img)imagedestroy($dst_img);
if($src_img)imagedestroy($src_img);
}
?>
【问题讨论】:
标签: php image flutter dart image-processing