如何使用imagick在php中裁剪svg图像？

Question

I have SVG images, with lots of white space on the right side and at the bottom. How do I crop the image (given a fixed size, all images are going to be of same size) using PHP and imagick, and save them back to the same files?

Answer 1

You shouldn't need imagick for this at all. Since SVG is an XML-format you can load the document into a DOMDocument object and change the width and height attributes on the svg tag.

Here's an example (the svg file is borrowed from jenkov.com ) :

<?php
$svg = <<< EOF
<svg xmlns="http://www.w3.org/2000/svg"
    xmlns:xlink="http://www.w3.org/1999/xlink">

    <rect x="50" y="50" height="110" width="110"
          style="stroke:#ff0000; fill: #ccccff"
          transform="translate(30) rotate(45 50 50)"
            >
    </rect>
    <text x="70" y="100"
          transform="translate(30) rotate(45 50 50)"
    >Hello World</text>
</svg>
EOF;

$myWidth = 100;
$myHeight = 150;

$dom = new DOMDocument();
$dom->loadXML($svg);
$svg = $dom->getElementsByTagName('svg');
$svg->item(0)->setAttribute('width', $myWidth);
$svg->item(0)->setAttribute('height', $myHeight);

print $dom->saveXML($svg->item(0))."\n";

Answer 2

Sounds like you want to add a (tightly fitting) viewBox to your svg files, and then rasterize them with imagemagick.

Some options for doing the first step:

• SVG Cleaner
• SVG Scour