On Mar 12, 2008, at 3:06 PM, jeffupt wrote:
>>
> My current project requires that I'm able to specify the halftone
> parameters. The goal is not to rasterize the image myself, but to
> let the
> printer know how to print the embedded image.
Then you need to go back to whomever spec'd your project and tell
them that it is impossible.
>> There are no such controls in Illustrator's "Save as PDF" dialog.
>
> When a file is printed in Illustrator, we can choose "Save PDF" or
> "Save PDF
> as Postscript" from the native print dialog.
WHY would you print from Illustrator to create a PDF, when the
native file format for Illustrator is PDF? You've just thrown away 90
+% of the information of your document?!?!?
> The controls I referred to are
> on the output tab of the print dialog in illustrator. I've looked
> at the
> resulting postscript file and I discovered the postscript function
> "setscreen" which allows you to specify exactly the information
> that i need.
> ( screen angle, frequency, dot shape ).
>
Right - that's a feature of POSTSCRIPT - which is a device DEPENDENT
programming language.
> Do you know of any corresponding functionality in PDF?
>
I don't know how many times I must repeat myself.
PDF is a DEVICE INDEPENDENT file format that does NOT support what
you require.
Leonard Rosenthol
PDF Standards Evangelist
Adobe Systems
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