在 PHP 中用描点法“绘制”中文
前言:
为了实现更多的自动控制,可以使用CGI(Common Gateway Interface)程序来实现这些功能。 对于计数器和实时数据统计、发布,我们可以用图片来完成。在图片中输出文字。 //http头,告诉浏览器,这是一个GIF图片 上面示例,在400×300的图片上,自点(10,10)开始,绘制12磅的"1234567890"。你有没有注意到这张图片的大小是:251字节!你也可以试试其他的输出格式。 图片的大小,与图片中非背景象素点数有关,跟输出多少象素无关。 然而,有一个问题。 如何解决?! 好,来吧,我们一起来画字! 画字,首先要知道怎么画。 在某个坐标上显示一个某种颜色的点的函数是: header ("Content-type: image/gif"); 也就是说,我们只要获取某个汉字的所有点的信息,我们就能够通过这个函数,输出那个汉字。 在文件chs16.fon里,保存的,是国标区位码表(国家标准信息交换用汉字编码基本字符集GB-2312)。它是汉字的点阵字库。(WIN98系统中,此文件在c:windowscommand下。如果你要把它放在UNIX系统下使用,请注意大小写。如果没有,你可以在文末找到链接。) 从chs16.fon里,我们可以读取汉字的点阵数据。每个汉字,都是由16×16个点构成的。笔划走过的地方,点的值为1,否则为0;每个点占用一个位,每8个点构成一个字节。那么,一个汉字,就需要(16×16÷8=32)字节。 下面这个实例,是为了说明字符点阵的表示方法。
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