panda
bb6cc6e241
- lib/java/: Java renderer (JrxmlRenderer) using JasperReports 6.21.0 - JrxmlDebug for diagnostics, JrxmlGen for format reference - download_jars.sh for one-time dependency setup - agent/nodes.py: _render_jrxml_to_png() and _compute_pixel_similarity() - Pixel comparison integrates into validate node (SSIM < 0.4 fails) - Pixel fidelity context injected into correct_jrxml for targeted fixes - tests/test_pixel_comparison.py: 15 unit tests (render, SSIM, integration) - .gitignore: exclude lib/java/*.jar, lib/java/*.class, tmp/ - CLAUDE.md: v11 changelog documenting the rendering pipeline - All non-LLM tests pass (97/97)
111 lines
4.2 KiB
Java
111 lines
4.2 KiB
Java
import net.sf.jasperreports.engine.*;
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import net.sf.jasperreports.engine.export.*;
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import net.sf.jasperreports.export.*;
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import java.io.*;
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import java.util.*;
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import java.awt.image.*;
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import javax.imageio.*;
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/**
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* Minimal JRXML → PNG renderer for pixel-level fidelity comparison.
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* Usage: java JrxmlRenderer input.jrxml output.png [scale]
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* scale: optional zoom factor (default 2.0 for readable text)
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*
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* Uses JasperReports 7.x exporter API (SimpleExporterInput / SimpleGraphics2DExporterOutput).
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*/
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public class JrxmlRenderer {
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public static void main(String[] args) throws Exception {
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if (args.length < 2) {
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System.err.println("Usage: java JrxmlRenderer <input.jrxml> <output.png> [scale]");
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System.exit(1);
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}
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String jrxmlPath = args[0];
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String outputPath = args[1];
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float scale = args.length >= 3 ? Float.parseFloat(args[2]) : 2.0f;
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File jrxmlFile = new File(jrxmlPath);
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if (!jrxmlFile.exists()) {
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System.err.println("ERROR: JRXML file not found: " + jrxmlPath);
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System.exit(2);
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}
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try {
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// 1. Compile JRXML → JasperReport
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JasperReport report = JasperCompileManager.compileReport(jrxmlPath);
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// 2. Fill with empty data source
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Map<String, Object> params = new HashMap<>();
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JasperPrint print = JasperFillManager.fillReport(report, params, new JREmptyDataSource());
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int pages = print.getPages().size();
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if (pages == 0) {
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System.err.println("ERROR: Report has 0 pages after filling");
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System.exit(4);
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}
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// 3. Calculate image dimensions from page size
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// JasperReports uses 72 DPI, convert to pixels with scale
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int pageWidth = (int) Math.ceil(report.getPageWidth() * scale);
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int pageHeight = (int) Math.ceil(report.getPageHeight() * scale);
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// 4. Render each page to a BufferedImage
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java.util.List<BufferedImage> pageImages = new ArrayList<>();
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for (int i = 0; i < pages; i++) {
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BufferedImage pageImage = new BufferedImage(pageWidth, pageHeight, BufferedImage.TYPE_INT_RGB);
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java.awt.Graphics2D g2d = pageImage.createGraphics();
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g2d.setColor(java.awt.Color.WHITE);
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g2d.fillRect(0, 0, pageWidth, pageHeight);
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// Scale the graphics context
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g2d.scale(scale, scale);
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JRGraphics2DExporter exporter = new JRGraphics2DExporter();
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exporter.setExporterInput(new SimpleExporterInput(print));
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SimpleGraphics2DExporterOutput output = new SimpleGraphics2DExporterOutput();
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output.setGraphics2D(g2d);
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exporter.setExporterOutput(output);
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SimpleGraphics2DReportConfiguration config = new SimpleGraphics2DReportConfiguration();
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config.setPageIndex(i);
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exporter.setConfiguration(config);
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exporter.exportReport();
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g2d.dispose();
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pageImages.add(pageImage);
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}
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// 5. Combine pages into single tall image
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int totalHeight = 0;
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for (BufferedImage img : pageImages) {
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totalHeight += img.getHeight();
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}
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BufferedImage combined = new BufferedImage(pageWidth, totalHeight, BufferedImage.TYPE_INT_RGB);
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java.awt.Graphics2D g = combined.createGraphics();
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g.setColor(java.awt.Color.WHITE);
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g.fillRect(0, 0, pageWidth, totalHeight);
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int yOffset = 0;
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for (BufferedImage img : pageImages) {
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g.drawImage(img, 0, yOffset, null);
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yOffset += img.getHeight();
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}
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g.dispose();
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// 6. Write PNG
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ImageIO.write(combined, "png", new File(outputPath));
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System.out.println("OK: " + outputPath
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+ " (pages=" + pages
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+ ", size=" + pageWidth + "x" + totalHeight
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+ ", scale=" + scale + ")");
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} catch (JRException e) {
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System.err.println("JASPER_ERROR: " + e.getMessage());
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e.printStackTrace();
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System.exit(3);
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}
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}
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}
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