Title:     Apache(th) FOP: PDF Images Plug-In
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#Apache™ FOP: PDF Images Plug-In

## Overview { #overview}

The *fop-pdf-images* plug-in extends FOP in order to add support for using PDF images in fo:external-graphic elements when
generating PDF files. This means one can write something like:

    :::xml
    <fo:external-graphic src="my-doc.pdf#page=1"/>

and

    :::xml
    <fox:external-document src="my-doc.pdf"/>

## Reduce file size

If you input many pdfs together the output pdf has duplicate fonts. Set this flag to merge fonts in fop.xconf:

    :::xml
    <renderer mime="application/pdf">      
      <merge-fonts>true</merge-fonts>
    </renderer>

## Improve performance

If you use many of the same pdf's and they have a large content stream, this flag can improve performance.
The disadvantage will be it can cause higher memory use inside your printer.
Set this flag in fop.xconf:

    :::xml
    <renderer mime="application/pdf">      
      <form-xobject>true</form-xobject>
    </renderer>

## Known issues with Postscript output

- If fonts are not embedded in source PDF:
    - If OTF font type is needed text may be missing if Adobe Reader fonts are not found
    - Text may be rendered wrong or poorly if wrong font is selected as replacement   
- Transparency, layers and opacity may not render correctly
- Gradients in text may be different from the source PDF

## Binary Download { #binary}

If using the binary package, the four jar files should be placed in the *lib* directory of your FOP installation.

Binary distributions include "-bin" in their names, and can be downloaded from a [FOP-PDF-Images Distribution mirror](https://www.apache.org/dyn/closer.cgi/xmlgraphics/fop-pdf-images).

Here are the links to each package’s signature and checksum files. Signatures can be verified by using our [KEYS](https://www.apache.org/dist/xmlgraphics/fop/KEYS) file.

|     |     |     |     |
|-----|-----|-----|-----|
| [fop-pdf-images-2.5-bin.tar.gz](http://www.apache.org/dyn/closer.cgi?filename=/xmlgraphics/fop-pdf-images/binaries/fop-pdf-images-2.5-bin.tar.gz&action=download) | [PGP](https://www.apache.org/dist/xmlgraphics/fop-pdf-images/binaries/fop-pdf-images-2.5-bin.tar.gz.asc) | [SHA512](https://www.apache.org/dist/xmlgraphics/fop-pdf-images/binaries/fop-pdf-images-2.5-bin.tar.gz.sha512) |
| [fop-pdf-images-2.5-bin.zip](http://www.apache.org/dyn/closer.cgi?filename=/xmlgraphics/fop-pdf-images/binaries/fop-pdf-images-2.5-bin.zip&action=download) | [PGP](https://www.apache.org/dist/xmlgraphics/fop-pdf-images/binaries/fop-pdf-images-2.5-bin.zip.asc) | [SHA512](https://www.apache.org/dist/xmlgraphics/fop-pdf-images/binaries/fop-pdf-images-2.5-bin.zip.sha512) |
| [fop-pdf-images-2.5-src.tar.gz](http://www.apache.org/dyn/closer.cgi?filename=/xmlgraphics/fop-pdf-images/source/fop-pdf-images-2.5-src.tar.gz&action=download) | [PGP](https://www.apache.org/dist/xmlgraphics/fop-pdf-images/source/fop-pdf-images-2.5-src.tar.gz.asc) | [SHA512](https://www.apache.org/dist/xmlgraphics/fop-pdf-images/source/fop-pdf-images-2.5-src.tar.gz.sha512) |
| [fop-pdf-images-2.5-src.zip](http://www.apache.org/dyn/closer.cgi?filename=/xmlgraphics/fop-pdf-images/source/fop-pdf-images-2.5-src.zip&action=download) | [PGP](https://www.apache.org/dist/xmlgraphics/fop-pdf-images/source/fop-pdf-images-2.5-src.zip.asc) | [SHA512](https://www.apache.org/dist/xmlgraphics/fop-pdf-images/source/fop-pdf-images-2.5-src.zip.sha512) |

## Source Download { #source}

- Download a released version from a [FOP-PDF-Images Distribution mirror](https://www.apache.org/dyn/closer.cgi/xmlgraphics/fop-pdf-images). Source distributions include "-src" in their names.

## Older Releases { #older_releases}

The fop-pdf-images plug-in was donated by Jeremias M&auml;rki to the XMLGraphics project in 2012. Older releases can
be obtained from his plug-in [page](http://www.jeremias-maerki.ch/development/fop/index.html).

#History of Changes

## Version 2.5 { #version_2.5}

 - FOP-2904: Handle object for boundingbox
 - FOP-2922: Syntax error after writing content stream
 - FOP-2933: PDF to PDF checkbox missing

## Version 2.4 { #version_2.4}

 - FOP-2802: Java 10 PDF/SVG to Image box not shown
 - FOP-2812: Update PDFBox to 2.0.11
 - FOP-2836: Update PDFBox to 2.0.13
 - FOP-2840: Image mask in PDF not rendered to PS
 - FOP-2841: PDF to PDF with merge-fonts checkbox misaligned
 - FOP-2856: Support compile on Java 12
 - FOP-2873: Update to PDFBox 2.0.16
 - FOP-2879: Add caching to avoid parsing content stream
 - FOP-2882: Allow PDFFormXObject to improve performance

## Version 2.3 { #version_2.3}

- PDF to PDF deduplicate more types of streams
- PDF to PS allow fop fonts as fallback

## Version 2.2 { #version_2.2}

- Move to PDFBox 2
- Deduplicate PDF streams
- PDF to PS deduplication of images
- Remove xobj type=form
- Merge fonts (off by default)
- Support PDF shading to PS
- Merging of Tagged (Accessible) PDF