一：基本思想

做法非常简单，首先找到一张你想要的纹理素材图片，然后将该图片通过灰度

转换成一张灰度级别的纹理图，取得像素数据，扫描每个像素的灰度值来设置

纹理图像的每个像素的透明度。灰度值越高越接近白色的透明度越高，灰度

值越小的越接近黑色的透明度越小。然后利用Java 2D的TexturePaint来创建

纹理画笔，最终一步就是在目标图像上填充一个与它大小一致的纹理矩形。

如此便完成。

二：程序运行效果

纹理图：

目标图像：

http://

效果图：

源程序代码：

package com.gloomyfish.filter.study;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.TexturePaint;

import java.awt.geom.Rectangle2D;

import java.awt.image.BufferedImage;

public class TextureAdditionFilter extends AbstractBufferedImageOp {

private BufferedImage textureImage;

private float textureTransparency;

public TextureAdditionFilter()

{

textureTransparency = 0.9f;

System.out.println("Java texture Image Addition Filter");

}

public void setTextureImage(BufferedImage textureImage) {

this.textureImage = textureImage;

}

public void setTextureTransparency(float textureTransparency) {

this.textureTransparency = textureTransparency;

}

@Override

public BufferedImage filter(BufferedImage src, BufferedImage dest) {

if(textureImage != null) {

int width = textureImage.getWidth();

int height = textureImage.getHeight();

BufferedImage grayTextureImage = null;

grayTextureImage = new BufferedImage(width, height, BufferedImage.TYPE_4BYTE_ABGR);

int[] inPixels = new int[width*height];

int[] outPixels = new int[width*height];

getRGB( textureImage, 0, 0, width, height, inPixels );

int index = 0;

for(int row=0; row

int ta = 0, tr = 0, tg = 0, tb = 0;

for(int col=0; col

index = row * width + col;

ta = (inPixels[index] >> 24) & 0xff;

tr = (inPixels[index] >> 16) & 0xff;

tg = (inPixels[index] >> 8) & 0xff;

tb = inPixels[index] & 0xff;

tr = tg = tb = (int)(0.299 * (double)tr + 0.587 * (double)tg + 0.114 * (double)tb);

ta = (int)(textureTransparency * tr);

outPixels[index] = (ta << 24) | (tr << 16) | (tg << 8) | tb;

}

}

// then call java 2D API to print texture image on target image

// you can see magic result image if you adjust the parameter-textureTransparency

// just play with it......

setRGB( grayTextureImage, 0, 0, width, height, outPixels );

Rectangle2D rectangle = new Rectangle(0, 0, width, height);

TexturePaint tp = new TexturePaint(grayTextureImage, rectangle);

Graphics2D g2d = src.createGraphics();

g2d.setPaint(tp);

width = src.getWidth();

height = src.getHeight();

g2d.fillRect(0, 0, width, height);

}

return src;

}

}

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