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| author | Ken Sharp <ken.sharp@artifex.com> | 2022-05-08 15:13:16 +0100 |
|---|---|---|
| committer | Ken Sharp <ken.sharp@artifex.com> | 2022-05-10 11:27:36 +0100 |
| commit | 398bfc844bde6e2b2a4f6552ce326ad619471316 (patch) | |
| tree | 88a4a82e5f1b00ac5654186c16d7c0afe1058d3f /Resource | |
| parent | bdc105a686f0c8fa1e29312302091685d27a9464 (diff) | |
| download | ghostpdl-398bfc844bde6e2b2a4f6552ce326ad619471316.tar.gz | |
GhostPDF - revamp PDF information extraction
A customer requested that we make pdf_info.ps work with the new
PDF interpreter, and generate the same information.
This commit modifies the way we extract information on a
page-by-page basis to potentially include the names of spot inks
and information about fonts used on the page.
This is now returned to the PostScript environment using a PDF
dictionary instead of a C structure. The pdf_info.ps program has
been updated so that it use the new information in broadly the
same way as the information from the old PDF interpreter.
There are differences; pdf_info.ps extracts font information
itself, rather than having the interpreter do it. This is not
possible with the new interpreter which is why we have the
PDF interpreter do it for us. In addition the pdf_info.ps
program only descended to the page level whereas the new PDF
interpreter evaluates all objects on the page, potentially
meaning that more fonts (and technically spot inks) might be
detected.
We now have an additional PostScript operator '.PDFPageInfoExt'
which returns 'extended' information about a page. This is the
same as .PDFPageInfo but includes the font and spot ink
information.
Running with -dPDFINFO using either Ghostscript or GhostPDF will
print more information than before, including the spot inks and
considerably more information about fonts than the pdf_info.ps
program emits, including embedding status, descendant fonts
(and their membedding status) and the presence of ToUnicode
CMaps.
Updated documentation for all of the above.
Diffstat (limited to 'Resource')
| -rw-r--r-- | Resource/Init/pdf_main.ps | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/Resource/Init/pdf_main.ps b/Resource/Init/pdf_main.ps index a49924881..c12fc3693 100644 --- a/Resource/Init/pdf_main.ps +++ b/Resource/Init/pdf_main.ps @@ -1068,9 +1068,15 @@ currentdict /PDFSwitches undef /newpdf_pdfshowpage { - pdfshowpage_init - pdfshowpage_setpage - pdfshowpage_finish + /PDFINFO where {/PDFINFO get}{//false}ifelse + { + /Page# get PDFFile exch 1 sub {.PDFDrawPage} stopped pop + } + { + pdfshowpage_init + pdfshowpage_setpage + pdfshowpage_finish + }ifelse } bind def /newpdf_runpdfend |