감자머리와말랑공주

java로 구현한 watermark 샘플코드

package org.watermark;

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Font;

import java.awt.GradientPaint;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.RenderingHints;

import java.awt.Shape;

import java.awt.font.GlyphVector;

import java.awt.geom.AffineTransform;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import javax.imageio.ImageIO;

public class WaterMarkUtil3 {

public static void main(String[] args) {

    String strWText = "ABCDABCDABCDABCDABCDABCDABCD";

        // create graphics context and enable anti-aliasing

    try {

    File sourceImageFile = new File("d:/test.jpg");

    File destImageFile = new File("d:/testwater01.jpg");

    BufferedImage sourceImage = ImageIO.read(sourceImageFile);

    Graphics2D g2d = (Graphics2D) sourceImage.getGraphics();

        //Graphics2D g2d = original.createGraphics();

        g2d.scale(1, 1);

        g2d.addRenderingHints(

                new RenderingHints(RenderingHints.KEY_ANTIALIASING,

                                   RenderingHints.VALUE_ANTIALIAS_ON));

        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,

                             RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

        // create watermark text shape for rendering

        Font font = new Font(Font.SANS_SERIF, Font.PLAIN, 18);

        GlyphVector fontGV = font.createGlyphVector(g2d.getFontRenderContext(), strWText);

        Rectangle size = fontGV.getPixelBounds(g2d.getFontRenderContext(), 0, 0);

        Shape textShape = fontGV.getOutline();

        //double textWidth = size.getWidth();         

        double textWidth = size.getWidth();

        //double textHeight = size.getHeight();

        double textHeight = size.getHeight()*3; // 텍스트 간격이다.

        //AffineTransform rotate45 = AffineTransform.getRotateInstance(Math.PI / 4d);

        AffineTransform rotate45 = AffineTransform.getRotateInstance(Math.PI / 5d);

        Shape rotatedText = rotate45.createTransformedShape(textShape);

        // use a gradient that repeats 4 times

        g2d.setPaint(new GradientPaint(0, 0,

                            new Color(0f, 0f, 0f, 0.1f),

                            sourceImage.getWidth() / 2, sourceImage.getHeight() / 2,

                            new Color(0f, 0f, 0f, 0.1f)));

                            //new Color(1f, 1f, 1f, 0.1f)));

        //g2d.setStroke(new BasicStroke(0.5f));

        g2d.setStroke(new BasicStroke(1f));

        // step in y direction is calc'ed using pythagoras + 5 pixel padding

        //double yStep = Math.sqrt(textWidth * textWidth / 2) + 2;

        double yStep = Math.sqrt(textWidth * textWidth / 2); //

        System.out.println("yStep : " + yStep);

        // step over image rendering watermark text

        //for (double x = -textHeight * 3; x < sourceImage.getWidth(); x += (textHeight * 3)) {

        for (double x = -textHeight; x < sourceImage.getWidth()/2; x += textHeight) {

            double y = -yStep;

            for (; y < sourceImage.getHeight(); y += yStep) {

                g2d.draw(rotatedText);

                g2d.fill(rotatedText);

                g2d.translate(0, yStep);

            }

            g2d.translate(textHeight * 3, -(y + yStep));

        }

            ImageIO.write(sourceImage, "jpg", destImageFile);

            g2d.dispose();

            System.out.println("The tex watermark is added to the image.");         

        } catch (IOException ex) {

            System.err.println(ex);

        }

    }

}

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