Beyond Linux® From Scratch (System V 版) - Version r12.0-1055+

第50章 PostScript

fop-2.9

fop の概要

FOP (Formatting Objects Processor) は XSL フォーマットオブジェクト (XSL formatting objects; XSL-FO) に基づいた、印刷フォーマッターを提供します。 a formatting object tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PostScript, SVG, XML (area tree representation), print, AWT, MIF and ASCII text. The primary output target is PDF.

[注記]

注記

LFS や依存パッケージが本ブックに示す最新安定バージョンでなかった場合には、BLFS 開発版においては、パッケージのビルドや処理実行が適切に行われないことがあります。

パッケージ情報

追加のダウンロード

Required Additional Downloads:

推奨

fop の依存パッケージ

必須

apache-ant-1.10.14

任意

グラフィック環境 (to run tests), JAI Image I/O Tools, and JEuclid

fop のインストール

ビルド前には環境変数 $JAVA_HOME が適切に設定されていることを確認してください。 また JIMI SDK や XMLUnit といった拡張クラスをビルドする場合は、環境変数 CLASSPATH にて対応する .jar が設定されていることを確認してください。

OFFO ハイフネーションパターンのインストール

Copy the XML hyphenation patterns into the fop source tree by running the following commands: 

unzip ../offo-hyphenation.zip &&
cp offo-hyphenation/hyph/* fop/hyph &&
rm -rf offo-hyphenation

Installing a temporary Maven binary

Starting with fop-2.5, the Maven build system is required. We use the binary provided by apache, that we install in a temporary location: 

tar -xf ../apache-maven-3.9.4-bin.tar.gz -C /tmp

fop コンポーネントのインストール

The javadoc command that ships with OpenJDK 10 and later has become much stricter than previous versions regarding conformance of the Javadoc comments in source code to HTML. The FOP documentation does not meet those standards, so the conformance checks have to be disabled. This can be done with the following command: 

sed -i '\@</javad@i\
<arg value="-Xdoclint:none"/>\
<arg value="--allow-script-in-comments"/>\
<arg value="--ignore-source-errors"/>' \
    fop/build.xml

以下のコマンドを実行して fop をビルドします。 

cd fop &&

LC_ALL=en_US.UTF-8                     \
PATH=$PATH:/tmp/apache-maven-3.9.4/bin \
ant all javadocs &&

mv build/javadocs .

This package comes with a test suite, but the java infrastructure installed in this book does not allow running it.

root ユーザーになって Fop をインストールします。 

install -v -d -m755 -o root -g root          /opt/fop-2.9 &&
cp -vR build conf examples fop* javadocs lib /opt/fop-2.9 &&
chmod a+x /opt/fop-2.9/fop                                &&
ln -v -sfn fop-2.9 /opt/fop

The last thing to do is to clean what we have done: 

rm -rf /tmp/apache-maven-3.9.4

コマンド説明

sed -i ... build.xml: This adds three switches to the javadoc command, preventing some errors from occurring when building the documentation.

export LC_ALL=en_US.UTF-8: the compiler fails if using an ASCII locale.

ant target: This reads the file build.xml and builds the target: compile compiles the java sources, jar-main generates jar archives, jar-hyphenation generates the hyphenation patterns for FOP, junit runs the junit tests, and javadocs builds the documentation. The all target runs all of the above.

ln -v -sf fop-2.9 /opt/fop: This is optional and creates a convenience symlink so that $FOP_HOME doesn't have to be changed each time there's a package version change.

fop の設定

設定ファイル

~/.foprc

設定情報

Using fop to process some large FO's (including the FO derived from the BLFS XML sources), can lead to memory errors. Unless you add a parameter to the java command used in the fop script you may receive messages similar to the one shown below:

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

To avoid errors like this, you need to pass an extra parameter to the java command used in the fop script. This can be accomplished by creating a ~/.foprc (which is sourced by the fop script) and adding the parameter to the FOP_OPTS environment variable.

The fop script looks for a FOP_HOME environment variable to locate the fop class libraries. You can create this variable using the ~/.foprc file as well. Create a ~/.foprc file using the following commands: 

cat > ~/.foprc << "EOF"
FOP_OPTS="-Xmx<RAM_Installed>m"
FOP_HOME="/opt/fop"
EOF

Replace <RAM_Installed> with a number representing the amount of RAM installed in your computer (in megabytes). An example would be FOP_OPTS="-Xmx768m".

To include the fop script in your path, update the system-wide profile with the following command as the root user: 

cat > /etc/profile.d/fop.sh << "EOF"
# Begin /etc/profile.d/fop.sh

pathappend /opt/fop

# End /etc/profile.d/fop.sh
EOF
[注記]

注記

Running fop can be somewhat verbose. The default logging level can be changed from INFO to any of FINEST, FINER, FINE, CONFIG, INFO, WARNING, SEVERE, ALL, or OFF. To do this, edit $JAVA_HOME/jre/lib/logging.properties and change the entries for .level and java.util.logging.ConsoleHandler.level to the desired value.

パッケージ構成

インストールプログラム: fop
インストールライブラリ: fop.jar and numerous support library classes located in /opt/fop/{build,lib}; JAI components include libmlib_jai.so, jai_codec.jar, jai_core.jar, mlibwrapper_jai.jar
インストールディレクトリ: /opt/fop-2.9

概略説明

fop

is a wrapper script to the java command which sets up the fop environment and passes the required parameters

fop.jar

fop のすべての Java クラスを提供します。