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package play.libs;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageOutputStream;
import jj.play.ns.nl.captcha.backgrounds.BackgroundProducer;
import jj.play.ns.nl.captcha.backgrounds.FlatColorBackgroundProducer;
import jj.play.ns.nl.captcha.backgrounds.GradiatedBackgroundProducer;
import jj.play.ns.nl.captcha.backgrounds.SquigglesBackgroundProducer;
import jj.play.ns.nl.captcha.backgrounds.TransparentBackgroundProducer;
import jj.play.ns.nl.captcha.gimpy.GimpyRenderer;
import jj.play.ns.nl.captcha.gimpy.RippleGimpyRenderer;
import jj.play.ns.nl.captcha.noise.CurvedLineNoiseProducer;
import jj.play.ns.nl.captcha.text.renderer.DefaultWordRenderer;
import play.exceptions.UnexpectedException;
import play.mvc.Http.Response;
/**
* Images utils
*/
public class Images {
/**
* Resize an image
* @param originalImage The image file
* @param to The destination file
* @param w The new width (or -1 to proportionally resize)
* @param h The new height (or -1 to proportionally resize)
*/
public static void resize(File originalImage, File to, int w, int h) {
try {
BufferedImage source = ImageIO.read(originalImage);
int owidth = source.getWidth();
int oheight = source.getHeight();
double ratio = (double) owidth / oheight;
if (w < 0 && h < 0) {
w = owidth;
h = oheight;
}
if (w < 0 && h > 0) {
w = (int) (h * ratio);
}
if (w > 0 && h < 0) {
h = (int) (w / ratio);
}
String mimeType = "image/jpeg";
if (to.getName().endsWith(".png")) {
mimeType = "image/png";
}
if (to.getName().endsWith(".gif")) {
mimeType = "image/gif";
}
// out
BufferedImage dest = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Image srcSized = source.getScaledInstance(w, h, Image.SCALE_SMOOTH);
Graphics graphics = dest.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, w, h);
graphics.drawImage(srcSized, 0, 0, null);
ImageWriter writer = ImageIO.getImageWritersByMIMEType(mimeType).next();
ImageWriteParam params = writer.getDefaultWriteParam();
FileImageOutputStream toFs = new FileImageOutputStream(to);
writer.setOutput(toFs);
IIOImage image = new IIOImage(dest, null, null);
writer.write(null, image, params);
toFs.flush();
toFs.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Crop an image
* @param originalImage The image file
* @param to The destination file
* @param x1 The new x origin
* @param y1 The new y origin
* @param x2 The new x end
* @param y2 The new y end
*/
public static void crop(File originalImage, File to, int x1, int y1, int x2, int y2) {
try {
BufferedImage source = ImageIO.read(originalImage);
String mimeType = "image/jpeg";
if (to.getName().endsWith(".png")) {
mimeType = "image/png";
}
if (to.getName().endsWith(".gif")) {
mimeType = "image/gif";
}
int width = x2 - x1;
int height = y2 - y1;
// out
BufferedImage dest = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Image croppedImage = source.getSubimage(x1, y1, width, height);
Graphics graphics = dest.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, width, height);
graphics.drawImage(croppedImage, 0, 0, null);
ImageWriter writer = ImageIO.getImageWritersByMIMEType(mimeType).next();
ImageWriteParam params = writer.getDefaultWriteParam();
writer.setOutput(new FileImageOutputStream(to));
IIOImage image = new IIOImage(dest, null, null);
writer.write(null, image, params);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Encode an image to base64 using a data: URI
* @param image The image file
* @return The base64 encoded value
* @throws java.io.IOException
*/
public static String toBase64(File image) throws IOException {
return "data:" + MimeTypes.getMimeType(image.getName()) + ";base64," + Codec.encodeBASE64(IO.readContent(image));
}
/**
* Create a captche image
*/
public static Captcha captcha(int width, int height) {
return new Captcha(width, height);
}
/**
* Create a 150x150 captcha image
*/
public static Captcha captcha() {
return captcha(150, 50);
}
/**
* A captcha image.
*/
public static class Captcha extends InputStream {
public String text = null;
public BackgroundProducer background = new TransparentBackgroundProducer();
public GimpyRenderer gimpy = new RippleGimpyRenderer();
public Color textColor = Color.BLACK;
public List fonts = new ArrayList(2);
public int w, h;
public Color noise = null;
public Captcha(int w, int h) {
this.w = w;
this.h = h;
this.fonts.add(new Font("Arial", Font.BOLD, 40));
this.fonts.add(new Font("Courier", Font.BOLD, 40));
}
/**
* Tell the captche to draw a text and retrieve it
*/
public String getText() {
return getText(5);
}
/**
* Tell the captche to draw a text using the specified color (ex. #000000) and retrieve it
*/
public String getText(String color) {
this.textColor = Color.decode(color);
return getText();
}
/**
* Tell the captche to draw a text of the specified size and retrieve it
*/
public String getText(int length) {
return getText(length, "abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789");
}
/**
* Tell the captche to draw a text of the specified size using the specified color (ex. #000000) and retrieve it
*/
public String getText(String color, int length) {
this.textColor = Color.decode(color);
return getText(length);
}
public String getText(int length, String chars) {
char[] charsArray = chars.toCharArray();
Random random = new Random(System.currentTimeMillis());
StringBuffer sb = new StringBuffer(length);
for (int i = 0; i < length; i++) {
sb.append(charsArray[random.nextInt(charsArray.length)]);
}
text = sb.toString();
return text;
}
public String getText(String color, int length, String chars) {
this.textColor = Color.decode(color);
return getText(length, chars);
}
/**
* Add noise to the captcha.
*/
public Captcha addNoise() {
noise = Color.BLACK;
return this;
}
/**
* Add noise to the captcha.
*/
public Captcha addNoise(String color) {
noise = Color.decode(color);
return this;
}
/**
* Set a gradient background.
*/
public Captcha setBackground(String from, String to) {
GradiatedBackgroundProducer bg = new GradiatedBackgroundProducer();
bg.setFromColor(Color.decode(from));
bg.setToColor(Color.decode(to));
background = bg;
return this;
}
/**
* Set a solid background.
*/
public Captcha setBackground(String color) {
background = new FlatColorBackgroundProducer(Color.decode(color));
return this;
}
/**
* Set a squiggles background
*/
public Captcha setSquigglesBackground() {
background = new SquigglesBackgroundProducer();
return this;
} // ~~ rendering
ByteArrayInputStream bais = null;
@Override
public int read() throws IOException {
check();
return bais.read();
}
@Override
public int read(byte[] b) throws IOException {
check();
return bais.read(b);
}
void check() {
try {
if (bais == null) {
if (text == null) {
text = getText();
}
BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
DefaultWordRenderer renderer = new DefaultWordRenderer(textColor, fonts);
bi = background.addBackground(bi);
renderer.render(text, bi);
if (noise != null) {
new CurvedLineNoiseProducer(noise, 3.0f).makeNoise(bi);
}
gimpy.gimp(bi);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(bi, "png", baos);
bais = new ByteArrayInputStream(baos.toByteArray());
//
Response.current().contentType = "image/png";
}
} catch (Exception e) {
throw new UnexpectedException(e);
}
}
}
}
