imagick的：从路径中打开文件，调整大小，保存到文件夹

Question

I'm trying to append several images together into one big image, but the first hurdle is actually just getting the image to open.

I am attempting to do the following:

1. Open image from path
2. Size it with the specified dimensions
3. Save it to the current folder

I have the following:

define('WIDTH',  600);
define('HEIGHT', 800);

$img = new Imagick();
$img->readImage('dress.jpg');
$img->writeImage('image1.png');

I can get the image to save, but I do not know where to add the WIDTH and HEIGHT definitions?

I tried doing the following:

$img->newImage(WIDTH, HEIGHT, $img);

Answer 1

$img = new Imagick();
$img->readImage('dress.jpg');

$img->resizeImage(WIDTH, HEIGHT, Imagick::FILTER_LANCZOS, 1);

$img->writeImage('image1.png');

After "creating" an image resource with new Imagick() you are "working" in that resource. readImage() reads the image which is then present in the resource - after that you can resize the resource and write it out after the work is done.

See the documentation for more info Imagick::resizeImage()

With new Imagick(WIDTH, HEIGHT) you create an image resource with an empty canvas of the given size.