[英]SVG to PNG - Batik
使用Apache Batik從SVG轉換為PNG時,有時會出現奇怪的錯誤。 例如,對於此SVG https://www.macstories.net/app/themes/macstories4/images/logo-shape-bw.svg,它會引發異常,但對於此https://upload.wikimedia.org/wikipedia不會/commons/0/02/SVG_logo.svg
這是我的代碼:
package com.stackoverflow.batik;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.apache.batik.transcoder.SVGAbstractTranscoder;
import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
public class Converter {
public static BufferedImage convertSVGToPNG(String url) throws TranscoderException, IOException {
ByteArrayOutputStream resultByteStream = new ByteArrayOutputStream();
TranscoderInput transcoderInput = new TranscoderInput(url);
TranscoderOutput transcoderOutput = new TranscoderOutput(resultByteStream);
PNGTranscoder pngTranscoder = new PNGTranscoder();
pngTranscoder.addTranscodingHint(SVGAbstractTranscoder.KEY_HEIGHT, 256f);
pngTranscoder.addTranscodingHint(SVGAbstractTranscoder.KEY_WIDTH, 256f);
pngTranscoder.transcode(transcoderInput, transcoderOutput);
resultByteStream.flush();
return ImageIO.read(new ByteArrayInputStream(resultByteStream.toByteArray()));
}
public static void main(String args[]) throws TranscoderException, IOException {
BufferedImage image = convertSVGToPNG("https://www.macstories.net/app/themes/macstories4/images/logo-shape-bw.svg");
assert image.getWidth() == 256;
assert image.getHeight() == 256;
}
}
這是例外
Exception in thread "main" org.apache.batik.transcoder.TranscoderException: null
Enclosed Exception:
The current document is unable to create an element of the requested type (namespace: http://www.w3.org/2000/svg, name: description).
at org.apache.batik.transcoder.XMLAbstractTranscoder.transcode(Unknown Source)
at org.apache.batik.transcoder.SVGAbstractTranscoder.transcode(Unknown Source)
at com.stackoverflow.batik.Converter.convertSVGToPNG(Converter.java:25)
at com.stackoverflow.batik.Converter.main(Converter.java:33)
難道我做錯了什么?
SVG沒有描述標簽。 我假設您要編寫確實存在的 <desc>
。
Chrome和其他瀏覽器會忽略未知標簽。 蠟染也應該,但不是。 在將其提供給Batik之前,您始終可以使用XSLT轉換(或其他某種機制)將desc標簽替換為desc標簽。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.