fork download
copy 
  1. import java.awt.image.BufferedImage;
  2. import java.awt.image.DataBufferByte;
  3. import java.io.File;
  4. import java.time.Duration;
  5. import java.time.Instant;
  6. import javax.imageio.ImageIO;
  7.  
  8. class Ideone
  9. {
  10.     public static byte IntToByte(int Val)
  11.     {
  12.         if (Val > 127)
  13.         {
  14.             Val = Val - 256;
  15.         }
  16.         return (byte)Val;
  17.     }    
  18.  
  19.     public static void main(String[] args)  throws java.lang.Exception
  20.     {
  21.         int BmpW = 30 * 256;
  22.         int BmpH = 20 * 256;
  23.         BufferedImage TestBmp = new BufferedImage(BmpW, BmpH, BufferedImage.TYPE_3BYTE_BGR);
  24.  
  25.         Instant SW = Instant.now();
  26.  
  27.         System.out.println("Start");
  28.  
  29.         byte[] TestBmp__ = ((DataBufferByte)TestBmp.getRaster().getDataBuffer()).getData();
  30.         int TestBmp__Stride = BmpW * 3;
  31.         int Ptr = 0;
  32.  
  33.         for (int YY = 0; YY < 10; YY++)
  34.         {
  35.             for (int XX = 0; XX < 10; XX++)
  36.             {
  37.                 int PtrOffset = (TestBmp__Stride * 512 * YY) + (768 * 3 * XX);
  38.  
  39.                 Ptr = PtrOffset;
  40.                 for (int Y = 0; Y < 256; Y++)
  41.                 {
  42.                     for (int X = 0; X < 256; X++)
  43.                     {
  44.                         TestBmp__[Ptr + 0] = IntToByte(0);
  45.                         TestBmp__[Ptr + 1] = IntToByte(Y);
  46.                         TestBmp__[Ptr + 2] = IntToByte(X);
  47.                         Ptr += 3;
  48.                     }
  49.                     Ptr = Ptr + TestBmp__Stride - (3 * 256);
  50.                 }
  51.  
  52.                 Ptr = PtrOffset + (3 * 256);
  53.                 for (int Y = 0; Y < 256; Y++)
  54.                 {
  55.                     for (int X = 0; X < 256; X++)
  56.                     {
  57.                         TestBmp__[Ptr + 0] = IntToByte(Y);
  58.                         TestBmp__[Ptr + 1] = IntToByte(X);
  59.                         TestBmp__[Ptr + 2] = IntToByte(0);
  60.                         Ptr += 3;
  61.                     }
  62.                     Ptr = Ptr + TestBmp__Stride - (3 * 256);
  63.                 }
  64.  
  65.                 Ptr = PtrOffset + (3 * 512);
  66.                 for (int Y = 0; Y < 256; Y++)
  67.                 {
  68.                     for (int X = 0; X < 256; X++)
  69.                     {
  70.                         TestBmp__[Ptr + 0] = IntToByte(X);
  71.                         TestBmp__[Ptr + 1] = IntToByte(0);
  72.                         TestBmp__[Ptr + 2] = IntToByte(Y);
  73.                         Ptr += 3;
  74.                     }
  75.                     Ptr = Ptr + TestBmp__Stride - (3 * 256);
  76.                 }
  77.  
  78.                 Ptr = PtrOffset + (TestBmp__Stride * 256);
  79.                 for (int Y = 0; Y < 256; Y++)
  80.                 {
  81.                     for (int X = 0; X < 256; X++)
  82.                     {
  83.                         TestBmp__[Ptr + 0] = IntToByte(255);
  84.                         TestBmp__[Ptr + 1] = IntToByte(Y);
  85.                         TestBmp__[Ptr + 2] = IntToByte(X);
  86.                         Ptr += 3;
  87.                     }
  88.                     Ptr = Ptr + TestBmp__Stride - (3 * 256);
  89.                 }
  90.  
  91.                 Ptr = PtrOffset + (TestBmp__Stride * 256) + (3 * 256);
  92.                 for (int Y = 0; Y < 256; Y++)
  93.                 {
  94.                     for (int X = 0; X < 256; X++)
  95.                     {
  96.                         TestBmp__[Ptr + 0] = IntToByte(Y);
  97.                         TestBmp__[Ptr + 1] = IntToByte(X);
  98.                         TestBmp__[Ptr + 2] = IntToByte(255);
  99.                         Ptr += 3;
  100.                     }
  101.                     Ptr = Ptr + TestBmp__Stride - (3 * 256);
  102.                 }
  103.  
  104.                 Ptr = PtrOffset + (TestBmp__Stride * 256) + (3 * 512);
  105.                 for (int Y = 0; Y < 256; Y++)
  106.                 {
  107.                     for (int X = 0; X < 256; X++)
  108.                     {
  109.                         TestBmp__[Ptr + 0] = IntToByte(X);
  110.                         TestBmp__[Ptr + 1] = IntToByte(255);
  111.                         TestBmp__[Ptr + 2] = IntToByte(Y);
  112.                         Ptr += 3;
  113.                     }
  114.                     Ptr = Ptr + TestBmp__Stride - (3 * 256);
  115.                 }
  116.  
  117.             }
  118.         }
  119.  
  120.         System.out.println("Stop ");
  121.         System.out.println(Duration.between(SW, Instant.now()).toMillis());
  122.  
  123.         try
  124.         {
  125.             ImageIO.write(TestBmp, "png", new File("/home/xxx/TestJava.png"));
  126.         }
  127.         catch (Exception E)
  128.         {
  129.         }
  130.     }
  131. }
Success #stdin #stdout #stderr 0.43s 175632KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Start
Stop 
140
stderr
copy 
java.io.FileNotFoundException: /home/xxx/TestJava.png (No such file or directory)
	at java.base/java.io.RandomAccessFile.open0(Native Method)
	at java.base/java.io.RandomAccessFile.open(RandomAccessFile.java:347)
	at java.base/java.io.RandomAccessFile.<init>(RandomAccessFile.java:261)
	at java.base/java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
	at java.desktop/javax.imageio.stream.FileImageOutputStream.<init>(FileImageOutputStream.java:69)
	at java.desktop/com.sun.imageio.spi.FileImageOutputStreamSpi.createOutputStreamInstance(FileImageOutputStreamSpi.java:55)
	at java.desktop/javax.imageio.ImageIO.createImageOutputStream(ImageIO.java:419)
	at java.desktop/javax.imageio.ImageIO.write(ImageIO.java:1549)
	at Ideone.main(Main.java:125)
https://ideone.com/6lpTJW
language:
Java (HotSpot 12)
created:
1 year ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!