图片缩放技术解析-优快云博客

本文链接：https://blog.youkuaiyun.com/exceed2008/article/details/1754801

本文主要探讨了如何进行图片缩放处理，详细介绍了相关技术，包括常见的图像处理方法和工具，帮助读者理解并掌握图片尺寸调整的核心技巧。

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final Image image = new Image(display,
        getClass(),getResourceAsStream( " Idea.jpg " ));
     final int width = image.getBounds().width;
     final int height = image.getBounds().height;

final Image scaled050 = new Image(display,
        image.getImageData().scaledTo(( int )(width * 0.5 ),( int )(height * 0.5 )));
     final Image scaled200 = new Image(display,
        image.getImageData().scaledTo(( int )(width * 2 ),( int )(height * 2 )));

final Image scaledGC200 = new Image(display,( int )(width * 2 ),( int )(height * 2 ));
    GC gc = new GC(scaledGC200);
    gc.drawImage(image, 0 , 0 ,width,height, 0 , 0 ,width * 2 ,height * 2 );
    gc.dispose();

    canvas.addPaintListener( new PaintListener() {
       public void paintControl(PaintEvent e) {
     e.gc.drawImage(image, 0 , 0 ,width,height, 0 , 0 ,( int )(width * 0.5 ),( int )(height * 0.5 ));
        e.gc.drawImage(scaled050, 100 , 0 );
        e.gc.drawImage(scaledGC200, 0 , 75 );
        e.gc.drawImage(scaled200, 225 , 175 );
      }
    });

其他和图片有关的的处理参见:http://www.eclipse.org/articles/Article-SWT-images/graphics-resources.html