如何控制pdf中有效性图标的大小

Question

我已经尝试了至少2天，现在控制一个pdf文件的有效性图标的大小，当签署。

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任何建议都将受到高度赞赏。

dsblank = Annotation::AppearanceStream.new.setFilter(:FlateDecode)
dsblank.Type=Name.new("XObject")
dsblank.Resources = Resources.new
dsblank.BBox = [ 0, 0, width, height ]
dsblank.draw_stream('% DSBlank')  


n2 = Annotation::AppearanceStream.new.setFilter(:FlateDecode)
n2.Resources = Resources.new
n2.BBox = [ 0, 0, width, height ]
n2.draw_stream('% DSBlank')

n5 = Annotation::AppearanceStream.new.setFilter(:FlateDecode)
n5.Resources = Resources.new
n5.BBox = [ 0, 0, width, height ]
n5.write(caption,x: padding_x, y: padding_y, size: text_size, leading: text_size )

sigannot = Annotation::Widget::Signature.new
sigannot.Rect = Rectangle[ llx: x, lly: y, urx: x+width, ury: y+height ]
sigannot.F = Annotation::Flags::PRINT #sets the print mode on

#
# Creates the stream for the signature appearance
#
streamN = Annotation::AppearanceStream.new.setFilter(:FlateDecode)
streamN.BBox = [ 0, 0,width, height]
streamN.Resources = Resources.new
streamN.Resources.add_xobject(Name.new("n0"), dsblank)
streamN.Resources.add_xobject(Name.new("n1"), dsblank)
streamN.Resources.add_xobject(Name.new("n2"), n2)
streamN.Resources.add_xobject(Name.new("n3"), dsblank)
streamN.Resources.add_xobject(Name.new("n5"), n5)
streamN.draw_stream('q 1 0 0 1 0 0 cm /n0 Do Q')
streamN.draw_stream('q 1 0 0 1 0 0 cm /n1 Do Q')
streamN.draw_stream('q 1 0 0 1 0 0 cm /n2 Do Q')
streamN.draw_stream('q 1 0 0 1 0 0 cm /n3 Do Q')
streamN.draw_stream('q 1 0 0 1 0 0 cm /n5 Do Q')

sigannot.set_normal_appearance(streamN)

page.add_annot(sigannot)

Answer 1

这不是一个说明如何修复它的答案，而是一个评论，认为尝试它根本不是一个好主意。但是，对于注释字段来说，它太大了。

您正在尝试制作PDF来支持Adobe Reader的功能，而Adobe很久以前就已经开始使用Adobe Reader9逐步淘汰该功能了！

（Adobe Acrobat 9的第10页数字签名、更改和改进）

此外,在Acrobat 6.0中已停止维护对n0和n2以外的层的支持：

（Adobe®Acrobat®SDK数字签名外观1.0版第8页，2006年10月）