add: ResizeTest example

src/main/java/example/ResizeTest.java

@@ -0,0 +1,53 @@
+package example;
+
+import com.luciad.imageio.webp.WebPReadParam;
+import com.luciad.imageio.webp.WebPWriteParam;
+
+import javax.imageio.IIOImage;
+import javax.imageio.ImageIO;
+import javax.imageio.ImageReader;
+import javax.imageio.ImageWriter;
+import javax.imageio.stream.FileImageInputStream;
+import javax.imageio.stream.FileImageOutputStream;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+
+public class ResizeTest {
+    public static void main(String args[]) throws IOException {
+        String inputWebpPath = "test_pic/test.webp";
+        String outputWebpPath = "test_pic/test_resize.webp";
+
+        // Obtain a WebP ImageReader instance
+        ImageReader reader = ImageIO.getImageReadersByMIMEType("image/webp").next();
+
+        // Configure decoding parameters
+        WebPReadParam readParam = new WebPReadParam();
+        readParam.setBypassFiltering(true);
+
+        // Configure the input on the ImageReader
+        reader.setInput(new FileImageInputStream(new File(inputWebpPath)));
+
+        // Decode the image
+        BufferedImage image = reader.read(0, readParam);
+        int height = image.getHeight();
+        int width = image.getWidth();
+
+        BufferedImage resizedImage = new BufferedImage(width * 2, height * 2, image.getType());
+        Graphics graphics = resizedImage.getGraphics();
+        graphics.drawImage(image, 0, 0, width * 2, height * 2, null);
+        graphics.dispose();
+
+        ImageWriter writer = ImageIO.getImageWritersByMIMEType("image/webp").next();
+        // Configure encoding parameters
+        WebPWriteParam writeParam = new WebPWriteParam(writer.getLocale());
+        writeParam.setCompressionMode(WebPWriteParam.MODE_DEFAULT);
+
+        // Configure the output on the ImageWriter
+        writer.setOutput(new FileImageOutputStream(new File(outputWebpPath)));
+
+        // Encode
+        writer.write(null, new IIOImage(resizedImage, null, null), writeParam);
+    }
+}