我曾為 iText PDF 文檔進行 SVG 圖像渲染。為此，我使用 SVGSalamander 將 SVG 轉換為圖像格式。它工作正常，但有一個奇怪的行為，即某些 SVG 圖像在某些圖像正在渲染時無法正確渲染。那些錯誤渲染的 svg 與真實圖像不對齊。我嘗試過，但我不明白為什么它只發生在某些圖像上。如果有人幫助我解決這個問題，我真的很感激。Java代碼：private static Image createSVGImage(PdfWriter pdfWriter, String imageEntry) throws BadElementException { Image image = null; Graphics2D g2dgraphics =null; PdfTemplate template = null; try{ SVGDiagram diagram = SVGCache.getSVGUniverse().getDiagram( new java.io.File( imageEntry ).toURI() ); template = pdfWriter.getDirectContent().createTemplate( diagram.getWidth(), diagram.getHeight()); diagram.setIgnoringClipHeuristic(true); g2dgraphics= new PdfGraphics2D(template, diagram.getWidth(), diagram.getHeight()); diagram.render(g2dgraphics); }catch( Exception e ){ e.printStackTrace(); } finally { if( g2dgraphics != null ){ g2dgraphics.dispose(); image = Image.getInstance(template); } g2dgraphics.dispose(); } return image;}SVG xml 代碼不對齊<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"> <path d="M19,16a46,46 0,1,0 62,0l-8,8a34,34 0,1,1-46,0z" fill="#069"/> <path d="M46,43v35a28,28 0,0,1-14-49zM54,43v35a28,28 0,0,0 14-49z" fill="#396"/> <circle r="15" cx="50" cy="18" fill="#900"/></svg>真實圖像上面這段代碼的輸出圖像
1 回答
ibeautiful
TA貢獻1993條經驗 獲得超6個贊
我真的不知道為什么這個庫會發生這種情況，因為沒有答案，我已將 SVGSalamendar 更改為 Batik 庫，如果有人需要，這是它的工作代碼
Maven 依賴項
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>batik-svggen</artifactId>
<version>1.11</version>
</dependency>
<!-- https://mvnrepository.com/artifact/batik/batik-transcoder -->
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>batik-transcoder</artifactId>
<version>1.11</version>
</dependency>
<!-- https://mvnrepository.com/artifact/batik/batik-rasterizer -->
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>batik-rasterizer</artifactId>
<version>1.11</version>
</dependency>
Java 代碼反映與上面相同的結果：
private static Image createSVGImage(PdfWriter pdfWriter, String imageEntry) throws BadElementException, IOException {
Image image = null;
final BufferedImage[] imagePointer = new BufferedImage[1];
PdfContentByte pdfCB = new PdfContentByte(pdfWriter);
try {
TranscoderInput input = new TranscoderInput(new FileInputStream(imageEntry));
ImageTranscoder t = new ImageTranscoder() {
@Override
public BufferedImage createImage(int w, int h) {
return new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
}
@Override
public void writeImage(BufferedImage img, TranscoderOutput output) throws TranscoderException {
// TODO Auto-generated method stub
imagePointer[0] = img;
}
};
t.addTranscodingHint(ImageTranscoder.KEY_FORCE_TRANSPARENT_WHITE,
Boolean.FALSE);
t.addTranscodingHint(ImageTranscoder.KEY_BACKGROUND_COLOR, Color.white);
t.transcode(input, null);
}
catch (TranscoderException ex) {
// Requires Java 6
ex.printStackTrace();
throw new IOException("Couldn't convert ");
}
image = Image.getInstance(pdfCB, imagePointer[0], 1);
return image;
}
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