Java Graphics.dispose Examples

Example #1

File: HelpUI.java Project: bgroenks96/MHS-Collections-Project

 private void scaleImage() {
   Image img =
       back.getScaledInstance(scx(back.getWidth()), scy(back.getHeight()), Image.SCALE_SMOOTH);
   back =
       new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_ARGB);
   Graphics g = back.getGraphics();
   g.drawImage(img, 0, 0, null);
   g.dispose();
 }

Example #2

File: MapBuilder.java Project: nachtm/Fire-Emblem-Clone

 /** Scales an image. To be used for tiles. Probably not the most efficient scaling method. */
 public static Image scaleImage(Image orig, int scale) {
   Image result;
   if (scale != 1) {
     int width = orig.getWidth(null);
     int height = orig.getHeight(null);
     // Scale cropped image to proper size
     result = new BufferedImage(width * scale, height * scale, BufferedImage.TYPE_INT_ARGB);
     Graphics g = ((BufferedImage) result).createGraphics();
     g.drawImage(orig, 0, 0, width * scale, height * scale, 0, 0, width - 1, height - 1, null);
     g.dispose();
   } else {
     return orig;
   }
   return result;
 }

Example #3

File: img_jsp.java Project: qq494679975/house

  public void _jspService(HttpServletRequest request, HttpServletResponse response)
      throws java.io.IOException, ServletException {

    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;

    try {
      response.setContentType("image/jpeg");
      pageContext =
          _jspxFactory.getPageContext(
              this, request, response, "/myhtml/errorpage/erroe.jsp", true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("\r\n");
      out.write("\r\n");
      out.write('\r');
      out.write('\n');

      // 设置页面不缓存
      response.setHeader("Pragma", "No-cache");
      response.setHeader("Cache-Control", "no-cache");
      response.setDateHeader("Expires", 0);

      //   在内存中创建图象
      int width = 60, height = 20;
      BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

      //   获取图形上下文
      Graphics g = image.getGraphics();

      // 生成随机类
      Random random = new Random();

      //   设定背景色
      g.setColor(getRandColor(200, 250));
      g.fillRect(0, 0, width, height);

      // 设定字体
      g.setFont(new Font("Times   New   Roman", Font.PLAIN, 18));

      // 画边框
      // g.setColor(new   Color());
      // g.drawRect(0,0,width-1,height-1);

      //   随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
      g.setColor(getRandColor(160, 200));
      for (int i = 0; i < 155; i++) {
        int x = random.nextInt(width);
        int y = random.nextInt(height);
        int xl = random.nextInt(12);
        int yl = random.nextInt(12);
        g.drawLine(x, y, x + xl, y + yl);
      }

      //   取随机产生的认证码(4位数字)
      String sRand = "";
      for (int i = 0; i < 4; i++) {
        String rand = String.valueOf(random.nextInt(10));
        sRand += rand;
        //   将认证码显示到图象中
        g.setColor(
            new Color(
                20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
        // 调用函数出来的颜色相同，可能是å›
        // ä¸ºç§å­å¤ªæŽ¥è¿‘，所以只能直接生成
        g.drawString(rand, 13 * i + 6, 16);
      }

      //   将认证码存入SESSION
      session.setAttribute("rand", sRand);

      //   图象生效
      g.dispose();

      //   输出图象到页面
      ImageIO.write(image, "JPEG", response.getOutputStream());
      out.clear();
      out = pageContext.pushBody();

    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)) {
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          try {
            out.clearBuffer();
          } catch (java.io.IOException e) {
          }
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
        else log(t.getMessage(), t);
      }
    } finally {
      _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }