php - 调整图像大小，然后使用 Codigniter 进行裁剪

Question

嗨，我正在使用 Codigniter 图像处理类来创建具有固定大小的缩略图所以我不会先调整它的大小（所以当我裁剪它时，我会得到一个很大的图像和平）然后裁剪它调整大小有效但是庄稼不

这是我创建的功能

function _generate_thumbnail($filename)
{
$config['image_library']     = 'gd2';
$config['source_image']      = './project_pics/big/'.$filename;
$config['new_image']         = './project_pics/resize/'.$filename;
$config['maintain_ratio']    = TRUE;
$config['width']             = 650;

$this->load->library('image_lib');
$this->image_lib->initialize($config);
$this->image_lib->resize();

$this->image_lib->clear();

$config['image_library'] = 'gd2';
$config['source_image']  = './project_pics/resize/'.$filename;
$config['new_image']     = './project_pics/crop/'.$filename;
$config['width']         = 650;
$config['height']        = 450;
$config['x_axis']        = 0;
$config['y_axis']        = 0;

$this->load->library('image_lib');
$this->image_lib->initialize($config);
$this->image_lib->crop();   
}

Answer 1

image_lib使用 Codeigniter 的库有一些限制。你不能"resize and crop"一次性使用这个库。

您必须image_lib像这样在每个操作之间重新初始化：

function _generate_thumbnail($filename)
{
 $config1 = $config2 = array();

 $config1['image_library']     = 'gd2';
 $config1['source_image']      = './project_pics/big/'.$filename;
 $config1['new_image']         = './project_pics/resize/'.$filename;
 $config1['maintain_ratio']    = TRUE;
 $config1['width']             = 650;

 $this->load->library('image_lib');
 $this->image_lib->initialize($config1);
 $this->image_lib->resize();

 $this->image_lib->clear();

 $config2['image_library'] = 'gd2';
 $config2['source_image']  = './project_pics/resize/'.$filename;
 $config2['new_image']     = './project_pics/crop/'.$filename;
 $config2['width']         = 650;
 $config2['height']        = 450;
 $config2['x_axis']        = 0;
 $config2['y_axis']        = 0;

 $this->image_lib->initialize($config2);
 $this->image_lib->crop();   
}