我正在使用Jcrop来裁剪用户的图像。我按照这里的教程进行操作:http://deepliquid.com/content/Jcrop_Implementation_Theory.html。这是我的代码
private function resizeImage($file_info)
{
$dst_w = $dst_h = 150;
$jpeg_quality = 90;
$src = realpath($file_info['directory'] . '/' . $file_info['name']);
// CHMOD before cropping
chmod($src, 0777);
switch (strtolower($file_info['mime'])) {
case 'image/jpeg':
$src_img = imagecreatefromjpeg($src);
break;
case 'image/png':
$src_img = imagecreatefrompng($src);
break;
case 'image/gif':
$src_img = imagecreatefromgif($src);
break;
default:
exit('Unsupported type: ' . $file_info['mime']);
}
$dst_img = imagecreatetruecolor($dst_w, $dst_h);
// Resize and crop the image
imagecopyresampled(
$dst_img, $src_img, // Destination and Source image link resource
0, 0, // Coordinate of destination point
$this->crop['x'], $this->crop['y'], // Coordinate of source point
$dst_w, $dst_h, // Destination width and height
$this->crop['w'], $this->crop['h'] // Source width and height
);
// Output the image
switch (strtolower($file_info['mime'])) {
case 'image/jpeg':
imagejpeg($dst_img, null, $jpeg_quality);
break;
case 'image/png':
imagepng($dst_img);
break;
case 'image/gif':
imagegif($dst_img);
break;
default:
exit('Unsupported type: ' . $file_info['mime']);
}
}
我已经检查了目录和文件都是可写的(0777权限)。我使用的所有变量也都定义得很好,没有任何错误。但是,最终图像仍保持其原始形式,未裁剪。
有人知道为什么它不起作用吗?任何帮助,不胜感激。
您使用list()
来获取源图像的宽度和高度,但未在imagecopyresampled()
调用中使用它。据我所知,其他一切看起来都很好,如果这不能解决它,问题可能出在课堂上的其他地方。
这是我的裁剪方法供参考,如果有帮助的话。
/**
* Crops the image to the given dimensions, at the given starting point
* defaults to the top left
* @param type $width
* @param type $height
* @param type $x
* @param type $y
*/
public function crop($new_width, $new_height, $x = 0, $y = 0){
$img = imagecrop($this->image, array(
"x" => $x,
"y" => $y,
"width" => $new_width,
"height" => $new_height
));
$this->height = $new_height;
$this->width = $new_width;
if(false !== $img) $this->image = $img;
else self::Error("Could not crop image.");
return $this;
}
调整大小的方法,供参考..
/**
* resizes the image to the dimensions provided
* @param type $width (of canvas)
* @param type $height (of canvas)
*/
public function resize($width, $height){
// Resize the image
$thumb = imagecreatetruecolor($width, $height);
imagealphablending($thumb, false);
imagesavealpha($thumb, true);
imagecopyresampled($thumb, $this->image, 0, 0, 0, 0, $width, $height, $this->width, $this->height);
$this->image = $thumb;
$this->width = $width;
$this->height = $height;
return $this;
}