Restored PDFDocumentGraphics2D functionality.

Bugfix: NPE after PDFDocumentGraphics2D.create() due to missing font setup and other missing initializations.
Bugfix: Properly handle state in PDFGraphics2D.drawString().
Added an example class demonstrating the use of PDFDocumentGraphics2D.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1183620 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 180 insertions, 0 deletions

diff --git a/examples/embedding/java/embedding/ExampleJava2D2PDF.java b/examples/embedding/java/embedding/ExampleJava2D2PDF.java
new file mode 100644
index 000000000..ff9807165
--- /dev/null
+++ b/examples/embedding/java/embedding/ExampleJava2D2PDF.java
@@ -0,0 +1,180 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* $Id$ */
+
+package embedding;
+
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.Graphics2D;
+import java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.StringReader;
+
+import javax.swing.JEditorPane;
+
+import org.apache.avalon.framework.configuration.Configuration;
+import org.apache.avalon.framework.configuration.ConfigurationException;
+import org.apache.avalon.framework.configuration.DefaultConfiguration;
+import org.apache.commons.io.IOUtils;
+
+import org.apache.xmlgraphics.util.UnitConv;
+
+import org.apache.fop.svg.PDFDocumentGraphics2D;
+import org.apache.fop.svg.PDFDocumentGraphics2DConfigurator;
+
+/**
+ * This example class demonstrates the use of {@link PDFDocumentGraphics2D} that can be
+ * used to create a PDF file from Java2D graphics (using the {@link Graphics2D} API).
+ */
+public class ExampleJava2D2PDF {
+
+    private Configuration createAutoFontsConfiguration() {
+        //Create a default configuration using auto-detection of fonts.
+        //This can be a bit slow but covers most use cases.
+        DefaultConfiguration c = new DefaultConfiguration("cfg");
+        DefaultConfiguration fonts = new DefaultConfiguration("fonts");
+        c.addChild(fonts);
+        DefaultConfiguration autodetect = new DefaultConfiguration("auto-detect");
+        fonts.addChild(autodetect);
+        return c;
+
+        /* You can also load the configuration from a file:
+        DefaultConfigurationBuilder cfgBuilder = new DefaultConfigurationBuilder();
+        return cfgBuilder.buildFromFile(configFile);
+        */
+    }
+
+    private void configure(PDFDocumentGraphics2D g2d, Configuration cfg)
+                throws ConfigurationException {
+
+        PDFDocumentGraphics2DConfigurator configurator = new PDFDocumentGraphics2DConfigurator();
+        configurator.configure(g2d, cfg);
+    }
+
+    /**
+     * Creates a PDF file. The contents are painted using a Graphics2D implementation that
+     * generates an PDF file.
+     * @param outputFile the target file
+     * @throws IOException In case of an I/O error
+     * @throws ConfigurationException if an error occurs configuring the PDF output
+     */
+    public void generatePDF(File outputFile) throws IOException, ConfigurationException {
+        OutputStream out = new java.io.FileOutputStream(outputFile);
+        out = new java.io.BufferedOutputStream(out);
+        try {
+
+            //Instantiate the PDFDocumentGraphics2D instance
+            PDFDocumentGraphics2D g2d = new PDFDocumentGraphics2D(false);
+            g2d.setGraphicContext(new org.apache.xmlgraphics.java2d.GraphicContext());
+
+            //Configure the G2D with the necessary fonts
+            configure(g2d, createAutoFontsConfiguration());
+
+            //Set up the document size
+            Dimension pageSize = new Dimension(
+                    (int)Math.ceil(UnitConv.mm2pt(210)),
+                    (int)Math.ceil(UnitConv.mm2pt(297))); //page size A4 (in pt)
+            g2d.setupDocument(out, pageSize.width, pageSize.height);
+            g2d.translate(144, 72); //Establish some page borders
+
+            //A few rectangles rotated and with different color
+            Graphics2D copy = (Graphics2D)g2d.create();
+            int c = 12;
+            for (int i = 0; i < c; i++) {
+                float f = ((i + 1) / (float)c);
+                Color col = new Color(0.0f, 1 - f, 0.0f);
+                copy.setColor(col);
+                copy.fillRect(70, 90, 50, 50);
+                copy.rotate(-2 * Math.PI / c, 70, 90);
+            }
+            copy.dispose();
+
+            //Some text
+            g2d.rotate(-0.25);
+            g2d.setColor(Color.RED);
+            g2d.setFont(new Font("sans-serif", Font.PLAIN, 36));
+            g2d.drawString("Hello world!", 140, 140);
+            g2d.setColor(Color.RED.darker());
+            g2d.setFont(new Font("serif", Font.PLAIN, 36));
+            g2d.drawString("Hello world!", 140, 180);
+
+            g2d.nextPage();
+
+            //Demonstrate painting rich text
+            String someHTML = "<html><body style=\"font-family:Verdana\">"
+                + "<p>Welcome to <b>page 2!</b></p>"
+                + "<h2>PDFDocumentGraphics2D Demonstration</h2>"
+                + "<p>We can <i>easily</i> paint some HTML here!</p>"
+                + "<p style=\"color:green;\">"
+                + "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin accumsan"
+                + " condimentum ullamcorper. Sed varius quam id arcu fermentum luctus. Praesent"
+                + " nisi ligula, cursus sed vestibulum vel, sodales sed lectus.</p>"
+                + "</body></html>";
+            JEditorPane htmlComp = new JEditorPane();
+            htmlComp.setContentType("text/html");
+            htmlComp.read(new StringReader(someHTML), null);
+            htmlComp.setSize(new Dimension(pageSize.width - 72, pageSize.height - 72));
+            //htmlComp.setBackground(Color.ORANGE);
+            htmlComp.validate();
+            htmlComp.printAll(g2d);
+
+            //Cleanup
+            g2d.finish();
+        } finally {
+            IOUtils.closeQuietly(out);
+        }
+    }
+
+    /**
+     * Main method.
+     * @param args command-line arguments
+     */
+    public static void main(String[] args) {
+        try {
+            System.out.println("FOP " + ExampleJava2D2PDF.class.getSimpleName() + "\n");
+            System.out.println("Preparing...");
+
+            //Setup directories
+            File baseDir = new File(".");
+            File outDir = new File(baseDir, "out");
+            if (!outDir.isDirectory()) {
+                if (!outDir.mkdirs()) {
+                    throw new IOException("Could not create output directory: " + outDir);
+                }
+            }
+
+            //Setup output file
+            File pdffile = new File(outDir, "ResultJava2D2PDF.pdf");
+
+            System.out.println("Output: PDF (" + pdffile + ")");
+            System.out.println();
+            System.out.println("Generating...");
+
+            ExampleJava2D2PDF app = new ExampleJava2D2PDF();
+            app.generatePDF(pdffile);
+
+            System.out.println("Success!");
+        } catch (Throwable t) {
+            t.printStackTrace(System.err);
+            System.exit(-1);
+        }
+    }
+}