David.Turing's blog

 

Java读取BMP文件

各位老大,帮我看看代码

         //  The DataInputStream allows you to read in 16 and 32 bit numbers
        DataInputStream in  =   new  DataInputStream(instream);
        DataOutputStream out
= new  DataOutputStream(outstream);

        
//  Verify that the header starts with 'BM'
         if  (in.read()  !=   ' B ' {
            
throw   new  IOException( " Not a .BMP file " );
        }

        out.write(
' B ' );
        
        
if  (in.read()  !=   ' M ' {
            
throw   new  IOException( " Not a .BMP file " );
        }

        out.write(
' M ' );
        
        
//      Get the total file size
         int  fileSize  =  intelInt(in.readInt());
        out.writeInt(intelInt(fileSize));

        
//      Skip the 2 16-bit reserved words
        out.writeShort(in.readUnsignedShort());
        out.writeShort(in.readUnsignedShort());

        
int  bitmapOffset  =  intelInt(in.readInt());
        out.writeInt(intelInt(bitmapOffset));
        
int  bitmapInfoSize  =  intelInt(in.readInt());
        out.writeInt(intelInt(bitmapInfoSize));
        
        
int  width  =  intelInt(in.readInt());
        out.writeInt(intelInt(width));
        
int  height  =  intelInt(in.readInt());
        out.writeInt(intelInt(height));
        
//  Skip the 16-bit bitplane size
        out.writeShort(in.readUnsignedShort());
        
int  bitCount  =  intelShort(in.readUnsignedShort());
        out.writeShort(intelShort(bitCount));
        
int  compressionType  =  intelInt(in.readInt());
        out.writeInt(intelInt(compressionType));
        
int  imageSize  =  intelInt(in.readInt());
        out.writeInt(intelInt(imageSize));
//  Skip pixels per meter
        out.writeInt(in.readInt());
        out.writeInt(in.readInt());

        
int  colorsUsed  =  intelInt(in.readInt());
        out.writeInt(intelInt(colorsUsed));
        
int  colorsImportant  =  intelInt(in.readInt());
        out.writeInt(intelInt(colorsImportant));
        System.out.println(
" [colorused]= " + colorsUsed);

//  Read the pixels from the stream based on the compression type
         if  (compressionType  ==  BI_RGB)  {
            
if  (bitCount  ==   24 {
                readRGB24(width, height, in, out);
            }

        }
 
    }


     protected   static   void  readRGB24( int  width,  int  height,
        DataInputStream in, OutputStream out)
    
throws  IOException
    
{

//  Start storing at the bottom of the array
         for  ( int  h  =  height - 1 ; h  >=   0 ; h -- {
         
for  ( int  w  =   0 ; w  <  width; w ++ {

//  Read in the red, green, and blue components
           int  red  =  in.read();
          
int  green  =  in.read();
          
int  blue  =  in.read();
          out.write(red);
          out.write(green);
          out.write(blue);
            }

        }

    }

posted on 2006-06-06 10:29 david.turing 阅读(1555) 评论(2)  编辑  收藏

评论

# re: Java读取BMP文件 2007-11-07 17:45 zouni

哪里抄过来的代码?  回复  更多评论   

# re: Java读取BMP文件 2007-11-07 17:52 david.turing

我晕,没有publish到blog的文章也能google到?  回复  更多评论   


只有注册用户登录后才能发表评论。


网站导航:
 

导航

统计

常用链接

留言簿(107)

我参与的团队

随笔分类(126)

随笔档案(155)

文章分类(9)

文章档案(19)

相册

搜索

积分与排名

最新随笔

最新评论

阅读排行榜

评论排行榜