JavaFX如何将WritableImage转换为Image
转载自
我正在做一些应用程序,制作截图LineChart
并将其保存为pdf,所以我不知道将WritableImage
(JavaFX 2.2)转换为Image
(iText lib)的平滑方式。
临时解决方案是
- 然后,制作快照
- 获得
WritableImage
从该快照 - 将图像写入png文件
- 打开图像并制作iText对象
Image
我想做一些更改:我不想将png
文件写入光盘,我只想将快照写入pdf
WritableImage wim = new WritableImage((int) lineChart.getWidth(),(int) lineChart.getHeight());
Scene scena = primaryStage.getScene();
scena.snapshot(wim);
File fileA = new File("C://Graphs/chart.png");
try {
ImageIO.write(SwingFXUtils.fromFXImage(wim, null), "png", fileA);
}
catch (Exception s) {
}
pdfDocument.add(preface3);
com.itextpdf.text.Image graph =com.itextpdf.text.Image.getInstance("C://Graphs/chart.png");
pdfDocument.add((com.itextpdf.text.Element) graph);
用途:
ByteArrayOutputStream byteOutput = new ByteArrayOutputStream();
ImageIO.write( SwingFXUtils.fromFXImage( wim, null ), "png", byteOutput );
com.itextpdf.text.Image graph;
graph = com.itextpdf.text.Image.getInstance( byteOutput.toByteArray() );
从画布中复制绘图,将复制到WritableImage,而不是从WritableImage获得图像
WritableImage wi = new WritableImage((int)gc.getCanvas().getWidth(),
(int)gc.getCanvas().getHeight());
gc.getCanvas().snapshot(null, wi); //Coping all that now in Canvas
//gc is GraphicContext object from Canvas, it has drawing functions
BufferedImage bi =SwingFXUtils.fromFXImage((Image)wi, null);
SwingFXUtils.toFXImage(bi, (WritableImage)image);