bug (?) codeigniter 作物图像高度和宽度改变

bug (?) codeigniter crop image height and width changed

我从 UI 发送了 source_imagex_axisy_axisheightwidth 来处理图像(在这种情况下我裁剪了一张图片),这是我的代码:

$this->load->library('image_lib');
$image = $this->input->post('source_image');
//array configuration for clock-wise and counter-clock-wise
$angle = array(
        0 => 0,
        90 => 270,
        180 => 180,
        270 => 90
    );

    $rotation = $this->input->post('rotation');
    $x = $this->input->post('x');
    $y = $this->input->post('y');
    $width = $this->input->post('width');
    $height = $this->input->post('height');

    $result = array();

    $config['image_library'] = 'gd2';
    $config['source_image'] = $image;
    $config['x_axis'] = $x;
    $config['y_axis'] = $y;
    $config['maintain_ratio'] = TRUE;
    $config['width'] = $width;
    $config['height'] = $height;

    $this->image_lib->initialize($config);

    if (!$this->image_lib->crop()) {
        $result = array(
        'result' => FALSE,
        'error' => $this->image_lib->display_errors()
        );
    }

当我完成裁剪图像然后再次检查它更改的分辨率时,例如:

width: 197px; height: 173px;

裁剪完应该是那个分辨率,但是我检查的时候分辨率变成了

width: 181px; height: 173px;

在其他情况下,有时宽度会变化,有时高度也会变化..

我在配置 $config 时错了吗?谢谢

那么你不应该使用 $config['maintain_ratio'] = TRUE;(将其设置为 false)。

Since the maintain_ratio option is enabled, the image will be as close to the target width and height as possible while preserving the original aspect ratio.

文档:https://www.codeigniter.com/userguide3/libraries/image_lib.html#processing-an-image

请记住,更改比例或将其设置为 false 以使尺寸成为硬值会导致某些图像倾斜或看起来很奇怪。 CI 没有办法真正处理这个问题,但还有其他上传库可以在保持指定大小的同时添加黑条,例如:https://github.com/verot/class.upload.php