Question

我尝试将手工制作的PostScript代码注入pscript5.dll生成的较大文档中。

我使用从http://paulbourke.net/dataformats/postscript/获取的方法（对于某些奇怪的原因，我以前的代码使用相同的转换矩阵打印4位，带有单个十六进制字符（0..f） - 停止工作了。）

因此，示例代码为：

100 200 translate
26 34 scale
26 34 8 [26 0 0 -34 0 34]
{<
ffffffffffffffffffffffffffffffffffffffffffffffffffff
ff000000000000000000000000000000000000ffffffffffffff
ff00efefefefefefefefefefefefefefefef0000ffffffffffff
ff00efefefefefefefefefefefefefefefef00ce00ffffffffff
ff00efefefefefefefefefefefefefefefef00cece00ffffffff
ff00efefefefefefefefefefefefefefefef00cecece00ffffff
ff00efefefefefefefefefefefefefefefef00cececece00ffff
ff00efefefefefefefefefefefefefefefef00000000000000ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efef000000ef000000ef000000ef0000ef0000efefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efef000000ef00000000ef00000000ef000000efefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efef0000ef00000000000000ef000000ef0000efefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff00efefefefefefefefefefefefefefefefefefefefefef00ff
ff000000000000000000000000000000000000000000000000ff
ffffffffffffffffffffffffffffffffffffffffffffffffffff
>}
image
showpage

在它之后，在HP LaserJet 1320上将源图像（png）转换为1位（因此将每个像素打印为“00”或“FF”），我偶然发现了一个奇怪的问题：图像大小达到某个值之间128x128和300x450，打印机打印白色矩形而不是预期的图像。总测试文档大小为2..9 MB。

Ghostscript-9.07解释器正确地显示了较大的插入图像，但是它的实现与HP的嵌入式解释器似乎不同 - 它与上面提到的代码一起工作正常，并且软件解释器的允许性是事实< / em>的

除了强制打印机确定最大值之外，还有哪些方法可以解决白人问题。使用“图片”方法打印数据大小？

更新：300x300已确认可打印，但随机500x500图像无法打印:( 在280多个字符处划线 - 没有帮助。

Answer 1

对于非常大的图像，您将开始遇到各种实施限制。常见限制是字符串，数组和字典中的65535个元素。如果您的图像数据大于64k，则需要将其切割为64k并分别馈送到image（为此目的，image采用过程参数而不仅仅是字符串数据源）。

如果您只是将数据嵌入一次使用，则可以使用标准惯用法进行预读进入缓冲区。

/buf 100 string
26 34 8 [26 0 0 -34 0 34]
{ currentfile buf readhexstring }
image
%hex data starts here

image可以被认为是一个循环运算符，它将继续调用提供的过程来获取更多数据。该过程甚至不需要返回完整的行，只需要返回少量的字符串。

HP LaserJet打印机上的PostScript“图像”命令有哪些限制？

1 个答案: