Add openpdf-renderer (#1357)

Author: andreasrosdal

openpdf-renderer/.gitignore

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+/bin/
+/build/

openpdf-renderer/LICENSE.txt

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+OpenPDF-renderer
+============
+
+OpenPDF-renderer is a Java library for rendering PDF files.
+
+
+Usage
+=====
+
+// example class for displaying a PDF file
+```java
+public class PDFDisplay extends JComponent{
+
+	// byte array containing the PDF file content
+	private byte[] bytes = null;
+	
+	
+	// some more code
+	
+	@Override
+	public void paintComponent(Graphics g) {
+		int pageindex = 1;
+		PDFFile pdfFile = new PDFFile(ByteBuffer.wrap(this.bytes));		
+		PDFPage page = pdfFile.getPage(pageIndex);
+		Paper paper = new Paper();
+		int formatOrientation = page.getAspectRatio() > 1 ? PageFormat.LANDSCAPE
+							: PageFormat.PORTRAIT;
+		if(formatOrientation == PageFormat.LANDSCAPE) {
+			paper.setSize(page.getHeight(), page.getWidth());
+		}else {
+			paper.setSize(page.getWidth(), page.getHeight());
+		}				
+		PageFormat pageFormat = new PageFormat();
+		pageFormat.setPaper(paper);
+		pageFormat.setOrientation(formatOrientation);
+
+		Graphics2D g2d = (Graphics2D)g.create();
+		Rectangle imgbounds = new Rectangle(0, 0, (int)pageFormat.getWidth(),
+						(int)pageFormat.getHeight());
+		PDFRenderer renderer = new PDFRenderer(page, g2d, imgbounds, null, Color.WHITE);
+		try {
+			this.page.waitForFinish();
+		}
+		catch (InterruptedException e) {
+			// some exception handling
+		}
+		renderer.run();
+	}
+}
+```

openpdf-renderer/README.md

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>com.github.librepdf</groupId>
+    <artifactId>openpdf-parent</artifactId>
+    <version>2.1.1-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>openpdf-renderer</artifactId>
+
+	<packaging>jar</packaging>
+	<name>OpenPDF Renderer</name>
+
+	<licenses>
+		<license>
+			<name>Lesser General Public License (LGPL)</name>
+			<url>http://www.gnu.org/copyleft/lesser.html</url>
+		</license>
+	</licenses>
+	<description>PDF renderer implementation supporting the subset of PDF 1.4 specification.</description>
+
+	<build>
+		<sourceDirectory>src</sourceDirectory>
+		<plugins>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>build-helper-maven-plugin</artifactId>
+				<version>3.6.1</version>
+				<executions>
+					<execution>
+						<phase>generate-resources</phase>
+						<goals>
+							<goal>add-resource</goal>
+						</goals>
+						<configuration>
+							<resources>
+								<resource>
+									<directory>${project.basedir}/stdclasses</directory>
+								</resource>
+								<resource>
+									<directory>${project.basedir}/src</directory>
+									<excludes>
+										<exclude>**/*.java</exclude>
+									</excludes>
+								</resource>
+							</resources>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.14.0</version>
+				<configuration>
+					<source>${java.version}</source>
+					<target>${java.version}</target>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>