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> 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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