用給定圖像座標的圖像的一部分填充矩形？

Question

我正在用許多獨立的小方塊創建一個紙板，我想用圖像的各個部分填充正方形，以便它們一起形成原始圖像。我怎麼做？我應該看什麼課程？順便說一句，我用paintComponent繪製板子。

public void paintComponent(Graphics g) { 
    super.paintComponent(g); 
    int boxHeight = boxHeight(); 
    int boxWidth = boxWidth(); 
    for (int row = 0; row < game.getRows(); row++) { 
     for (int col = 0; col < game.getCols(); col++) { 
      g.setColor(Color.lightGray); 
      g.drawRect(col * boxWidth, row * boxHeight, boxWidth, boxHeight); 
//this is where I want to fill the rectangles 
      if (game.isAlive(row, col)) { 
       g.setColor(color); 
       g.fillRect(col * boxWidth, row * boxHeight, boxWidth, boxHeight); 
      } 
     } 
    } 
} 

Answer 1

假如你有一個BufferedImage B：

public void paintComponent(Graphics g) { 
    super.paintComponent(g); 
    int boxHeight = boxHeight(); 
    int boxWidth = boxWidth(); 
    for (int row = 0; row < game.getRows(); row++) { 
     for (int col = 0; col < game.getCols(); col++) { 
      g.setColor(Color.lightGray); 
      g.drawRect(col * boxWidth, row * boxHeight, boxWidth, boxHeight); 
//this is where I want to fill the rectangles 
      if (game.isAlive(row, col)) { 
       g.setColor(color); 
       g.drawImage(b.getSubimage(col * boxWidth, row * boxHeight, boxWidth, boxHeight), col * boxWidth, row * boxHeight, boxWidth, boxHeight, null); 
      } 
     } 
    } 

假設你的圖像的尺寸與盒相同。否則，你必須縮小或擴大圖像：

BufferedImage b2=new BufferedImage(game.getCols()*boxWidth, game.getRows()*boxHeight, BufferedImage.TYPE_INT_RGB); 
Graphics g=b2.getGraphics(); 
g.drawImage(b, 0, 0, b2.getWidth(), b2.getHeight(), null); 

，並在環

g.drawImage(b2.getSubimage(col * boxWidth, row * box, boxWidth, boxHeight), col * boxWidth, row * boxHeight, boxWidth, boxHeight, null);