Author: jeremias
Date: Tue Jan 22 01:26:05 2008
New Revision: 614156
URL: http://svn.apache.org/viewvc?rev=614156&view=rev
Log:
Complete overhaul of the "Graphics" page after the new image loading framework
has been introduced.
Some updates on external links and about Java 1.4.
Modified:
xmlgraphics/fop/trunk/src/documentation/content/xdocs/site.xml
xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/embedding.xml
xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/graphics.xml
xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/running.xml
xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/servlets.xml
Modified: xmlgraphics/fop/trunk/src/documentation/content/xdocs/site.xml
URL:
http://svn.apache.org/viewvc/xmlgraphics/fop/trunk/src/documentation/content/xdocs/site.xml?rev=614156&r1=614155&r2=614156&view=diff
==============================================================================
--- xmlgraphics/fop/trunk/src/documentation/content/xdocs/site.xml (original)
+++ xmlgraphics/fop/trunk/src/documentation/content/xdocs/site.xml Tue Jan 22
01:26:05 2008
@@ -231,37 +231,20 @@
END Development tab
-->
- <!-- references label="Related Projects">
- <forrest label="Apache Forrest" href="http://forrest.apache.org/"/>
- <gump label="Apache Gump" href="http://jakarta.apache.org/gump/"/>
- <cocoon label="Apache Cocoon" href="http://cocoon.apache.org/"/>
- <lenya label="Apache Lenya" href="http://cocoon.apache.org/lenya/"/>
- <centipede label="Krysalis Centipede" href="http://www.krysalis.org/"/>
- </references -->
-
<external-refs>
- <!--cocoon href="http://cocoon.apache.org/2.1/";>
- <ml href="mail-lists.html"/>
- <actions href="userdocs/concepts/actions.html"/>
- <catalogs href="userdocs/concepts/catalog.html"/>
- <sitemap href="userdocs/concepts/sitemap.html"/>
- <input-modules href="userdocs/concepts/modules.html"/>
- <views href="userdocs/concepts/views.html"/>
- </cocoon-->
<xmlgraphics.apache.org href="http://xmlgraphics.apache.org/";>
<fop href="fop/"/>
<batik href="batik/"/>
+ <commons href="commons/"/>
</xmlgraphics.apache.org>
<svn-repo href="http://svn.apache.org/repos/asf/xmlgraphics/fop/";>
<trunk href="trunk/"/>
- <stable href="tags/fop-0_93"/>
+ <stable href="tags/fop-0_94"/>
<maintenance href="branches/fop-0_20_2-maintain/"/>
</svn-repo>
+ <forrest.apache.org href="http://forrest.apache.org/"/>
<xml.apache.org href="http://xml.apache.org/";>
- <forrest href="forrest/"/>
<xindice href="xindice/"/>
- <fop href="fop/"/>
- <batik href="batik/"/>
<commons href="commons/">
<resolver href="components/resolver/"/>
</commons>
@@ -270,6 +253,8 @@
<xerces href="http://xerces.apache.org"/>
<mail-archive href="http://marc.theaimsgroup.com"/>
<xpath-tut href="http://www.w3schools.com/xpath/"/>
+ <commons-logging href="http://commons.apache.org/logging/"/>
+ <commons-io href="http://commons.apache.org/io/"/>
<jakarta href="http://jakarta.apache.org/";>
<commons href="commons/">
<io href="io/"/>
Modified:
xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/embedding.xml
URL:
http://svn.apache.org/viewvc/xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/embedding.xml?rev=614156&r1=614155&r2=614156&view=diff
==============================================================================
--- xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/embedding.xml
(original)
+++ xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/embedding.xml
Tue Jan 22 01:26:05 2008
@@ -166,7 +166,7 @@
<title>Logging</title>
<p>
Logging is now a little different than it was in FOP 0.20.5. We've
switched from
- Avalon Logging to <a href="ext:jakarta/commons/logging">Jakarta
Commons Logging</a>.
+ Avalon Logging to <a href="ext:commons-logging">Jakarta Commons
Logging</a>.
While with Avalon Logging the loggers were directly given to FOP, FOP
now retrieves
its logger(s) through a statically available LogFactory. This is
similar to the
general pattern that you use when you work with Apache Log4J directly,
for example.
@@ -187,10 +187,10 @@
which documents what we're going to build.
</note>
<p>
- By default, <a href="ext:jakarta/commons/logging">Jakarta Commons
Logging</a> uses
+ By default, <a href="ext:commons-logging">Jakarta Commons Logging</a>
uses
JDK logging (available in JDKs 1.4 or higher) as its backend. You can
configure Commons
Logging to use an alternative backend, for example Log4J. Please
consult the
- <a href="ext:jakarta/commons/logging">documentation for Jakarta
Commons Logging</a> on
+ <a href="ext:commons-logging">documentation for Jakarta Commons
Logging</a> on
how to configure alternative backends.
</p>
</section>
Modified:
xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/graphics.xml
URL:
http://svn.apache.org/viewvc/xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/graphics.xml?rev=614156&r1=614155&r2=614156&view=diff
==============================================================================
--- xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/graphics.xml
(original)
+++ xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/graphics.xml
Tue Jan 22 01:26:05 2008
@@ -23,61 +23,91 @@
<version>$Revision$</version>
</header>
<body>
+ <section id="introduction">
+ <title>Introduction</title>
+ <p>
+ After the Apache FOP 0.94 release, the image handling subsystem has
been rewritten in
+ order to improve the range of supported images and image subtypes, to
lower the
+ overall memory consumption when handling images, to produce smaller
output files and to
+ increase the performance in certain areas. Of course, this causes a
few changes most of
+ which the user will probably not notice. The most important changes
are:
+ </p>
+ <ul>
+ <li>
+ The image libraries Jimi and JAI are no longer supported. Instead,
Apache FOP uses the
+ Image I/O API that was introduced with Java 1.4 for all bitmap
codecs.
+ </li>
+ <li>
+ Some bitmap images are no longer converted to a standardized 24 bit
RGB image but are
+ instead handled in their native format.
+ </li>
+ <li>
+ A plug-in mechanism offers a possibility to add support for new
formats without changing
+ the FOP's source code.
+ </li>
+ </ul>
+ <p>
+ The actual <a
href="http://xmlgraphics.apache.org/commons/image-loader.html";>image loading
framework</a>
+ no longer resides in Apache FOP, but was instead placed in
+ <a href="ext:xmlgraphics.apache.org/commons/">XML Graphics Commons</a>.
+ </p>
+ </section>
<section id="support-overview">
<title>Overview of Graphics Support</title>
<p>
- The table below summarizes the <em>theoretical</em> support for
graphical formats within FOP. In other words, within the constraints of the
limitations listed here, these formats <em>should</em> work. However, many of
them have not been tested, and there may be limitations that have not yet been
discovered or documented. The packages needed to support some formats are not
included in the FOP distribution and must be installed separately. Follow the
links in the "Support Thru" column for more details.
+ The table below summarizes the <em>theoretical</em> support for
graphical formats
+ within FOP. In other words, within the constraints of the limitations
listed here,
+ these formats <em>should</em> work. However, many of them have not
been tested,
+ and there may be limitations that have not yet been discovered or
documented.
+ The packages needed to support some formats are not included in the
FOP distribution
+ and must be installed separately. Follow the links in the "Support
Through" columns
+ for more details.
</p>
<table>
<tr>
- <th>Format</th>
- <th>Type</th>
- <th><a href="#native">FOP native support</a></th>
- <th><a href="#batik">Batik SVG</a></th>
- <th><a href="#batik-codecs">Batik codecs</a></th>
+ <th rowspan="2">Format</th>
+ <th rowspan="2">Type</th>
+ <th colspan="3">Support Through</th>
+ </tr>
+ <tr>
+ <th><a href="#native">Apache FOP (native)</a></th>
+ <th><a href="#batik">Apache Batik</a></th>
<th><a href="#imageio">Image I/O</a></th>
- <th><a href="#jai">JAI</a></th>
- <th><a href="#jimi">JIMI</a></th>
</tr>
<tr>
<td><a href="#bmp">BMP</a> (Microsoft Windows Bitmap)</td>
<td>bitmap</td>
- <td>X</td>
- <td></td>
<td></td>
<td></td>
+ <td>X [1]</td>
+ </tr>
+ <tr>
+ <td><a href="#emf">EMF</a> (Windows Enhanced Metafile)</td>
+ <td>vector (with embedded bitmaps)</td>
+ <td>(X)</td>
<td></td>
<td></td>
</tr>
<tr>
<td><a href="#eps">EPS</a> (Encapsulated PostScript)</td>
- <td>metafile (both bitmap and vector), probably most frequently used
for vector drawings</td>
+ <td>metafile (both bitmap and vector), most frequently used for
vector drawings</td>
<td>(X)</td>
<td></td>
<td></td>
- <td></td>
- <td></td>
- <td></td>
</tr>
<tr>
<td>GIF (Graphics Interchange Format)</td>
<td>bitmap</td>
- <td>X</td>
<td></td>
<td></td>
<td>X</td>
- <td>X</td>
- <td>X</td>
</tr>
<tr>
<td><a href="#jpeg">JPEG</a> (Joint Photographic Experts Group)</td>
<td>bitmap</td>
<td>(X)</td>
<td></td>
- <td></td>
<td>X</td>
- <td></td>
- <td></td>
</tr>
<tr>
<td><a href="#png">PNG</a> (Portable Network Graphic)</td>
@@ -85,9 +115,6 @@
<td></td>
<td></td>
<td>X</td>
- <td>X</td>
- <td></td>
- <td></td>
</tr>
<tr>
<td><a href="#svg">SVG</a> (Scalable Vector Graphics)</td>
@@ -95,270 +122,378 @@
<td></td>
<td>X</td>
<td></td>
- <td></td>
- <td></td>
- <td></td>
</tr>
<tr>
<td><a href="#tiff">TIFF</a> (Tag Image Format File)</td>
<td>bitmap</td>
<td>(X)</td>
<td></td>
- <td>X</td>
- <td>X</td>
- <td>X</td>
- <td></td>
- <!--td><a href="#native">FOP native</a> or <a href="#jai">JAI</a>,
depending on the subformat. See <a href="#tiff">TIFF</a> for more details.(JIMI
also supports TIFF, but this has not been implemented within FOP).</td-->
+ <td>X [1]</td>
</tr>
<tr>
- <td><a href="#emf">EMF</a> (Windows Enhanced Metafile)</td>
+ <td><a href="#wmf">WMF</a> (Windows Metafile)</td>
<td>vector (with embedded bitmaps)</td>
- <td>(X)</td>
- <td></td>
- <td></td>
- <td></td>
<td></td>
+ <td>(X)</td>
<td></td>
</tr>
</table>
- <note>"(X)" means restricted support. Please see the details
below.</note>
+ <p>
+ Legend:
+ </p>
+ <ul>
+ <li>"(X)" means restricted support. Please see the details below.</li>
+ <li>
+ [1]: Requires the presence of <a
href="http://jai-imageio.dev.java.net/";>JAI Image I/O Tools</a>
+ (or an equivalent Image I/O compatible codec) in the classpath. JAI
Image I/O Tools also
+ adds support for JPEG 2000, WBMP, RAW and PNM. Other Image I/O
codecs may provide
+ support for additional formats.
+ </li>
+ </ul>
+ <section id="format-map">
+ <title>Map of supported image formats by output format</title>
+ <p>
+ Not all image formats are supported for all output formats! For
example, while you can
+ use EPS (Encapsulated PostScript) files when you generate PostScript
output, this format
+ will not be supported by any other output format. Here's an overview
which image formats
+ are supported by which output format:
+ </p>
+ <table>
+ <tr>
+ <th>Image Format</th>
+ <th>PDF</th>
+ <th>PostScript</th>
+ <th>Java2D, PNG, TIFF, AWT</th>
+ <th>PCL</th>
+ <th>AFP</th>
+ <th>RTF</th>
+ </tr>
+ <tr>
+ <td><a href="#bmp">BMP</a> (Microsoft Windows Bitmap)</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ </tr>
+ <tr>
+ <td><a href="#emf">EMF</a> (Windows Enhanced Metafile)</td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td>X [1]</td>
+ </tr>
+ <tr>
+ <td><a href="#eps">EPS</a> (Encapsulated PostScript)</td>
+ <td></td>
+ <td>X [1]</td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ </tr>
+ <tr>
+ <td>GIF (Graphics Interchange Format)</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ </tr>
+ <tr>
+ <td><a href="#jpeg">JPEG</a> (Joint Photographic Experts
Group)</td>
+ <td>X [1]</td>
+ <td>X [1]</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X [1]</td>
+ <td>X</td>
+ </tr>
+ <tr>
+ <td><a href="#png">PNG</a> (Portable Network Graphic)</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ </tr>
+ <tr>
+ <td><a href="#svg">SVG</a> (Scalable Vector Graphics)</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ </tr>
+ <tr>
+ <td><a href="#tiff">TIFF</a> (Tag Image Format File)</td>
+ <td>X [2]</td>
+ <td>X [2]</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X [2]</td>
+ <td>X</td>
+ </tr>
+ <tr>
+ <td><a href="#wmf">WMF</a> (Windows Metafile)</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ <td>X</td>
+ </tr>
+ </table>
+ <p>
+ Legend:
+ </p>
+ <ul>
+ <li>
+ [1]: Supported without the need to decode the image.
+ </li>
+ <li>
+ [2]: Supported without the need to decode the image, but only for
certain subtypes.
+ </li>
+ </ul>
+ </section>
</section>
<section id="packages">
<title>Graphics Packages</title>
<section id="native">
- <title>FOP Native</title>
+ <title>XML Graphics Commons Native</title>
<p>
- FOP has native ability to handle some graphic file formats.
+ <a href="ext:xmlgraphics.apache.org/commons">XML Graphics
Commons</a> supports a number
+ graphic file formats natively as basic functionality: all bitmap
formats for which there
+ are Image I/O codecs available (JPEG, PNG, GIF, TIFF, etc.), EPS and
EMF.
</p>
</section>
- <section id="batik-codecs">
- <title>"Internal" codecs</title>
+ <section id="fop-native">
+ <title>FOP Native</title>
<p>
- Apache XML Graphics Commons contains codecs for PNG and TIFF access.
FOP can use these.
+ FOP has no native image plug-ins for the image loading framework of
its own but currently
+ hosts the Batik-dependent SVG and WMF plug-ins until they can be
moved to
+ <a href="ext:xmlgraphics.apache.org/batik">Apache Batik</a>.
</p>
</section>
- <section id="imageio">
- <title>Image I/O (JDK 1.4 or higher)</title>
+ <section id="batik">
+ <title>Apache Batik</title>
<p>
- For JDKs 1.4 or higher, FOP provides a wrapper to load images
through the
- <a class="fork"
href="http://java.sun.com/j2se/1.4.2/docs/guide/imageio/index.html";>JDK's Image
I/O API</a> (JSR 015).
- Image I/O allows to dynamically add additional image codecs. An
example of such an add-on library are the
- <a class="fork"
href="http://java.sun.com/products/java-media/jai/";>JAI Image I/O Tools</a>
available from Sun.
+ <a href="ext:xmlgraphics.apache.org/batik">Apache Batik</a> will
later receive the
+ SVG and WMF plug-ins for the image loading framework that are
currently hosted inside
+ FOP.
</p>
- </section>
- <section id="jimi">
- <title>JIMI</title>
<p>
- Because of licensing issues, the JIMI image library is not included
in the FOP distribution. First, <a class="fork"
href="http://java.sun.com/products/jimi";>download</a> and install it.
-Then, copy the file "JimiProClasses.zip" from the archive to
{fop-install-dir}/lib/jimi-1.0.jar. Please note that FOP binary distributions
are compiled with JIMI support, so there is no need for you to build FOP to add
the support. If jimi-1.0.jar is installed in the right place, it will
automatically be used by FOP, otherwise it will not.
+ Current FOP distributions include a distribution of the
+ <a class="fork" href="ext:xmlgraphics.apache.org/batik">Apache
Batik</a>.
+ Because Batik's API changes frequently, it is highly recommended
that you use the
+ version that ships with FOP, at least when running FOP.
</p>
- </section>
- <section id="jai">
- <title>JAI (Java Advanced Imaging API)</title>
+ <warning>Batik must be run in a graphical environment.</warning>
<p>
- FOP has been compiled with JAI support, but JAI is not included in
the FOP distribution.
-To use it, install <a
href="http://java.sun.com/products/java-media/jai";>JAI</a>, then copy the
jai_core.jar and the jai_codec.jar files to {fop-install-dir}/lib.
-JAI is much faster than JIMI, but is not available for all platforms. See <a
href="http://java.sun.com/products/java-media/jai/forDevelopers/jaifaq.html#platforms";>What
platforms are supported?</a> on the JAI FAQ page for more details.
+ Batik must be run in a graphical environment.
+ It uses AWT classes for rendering SVG, which in turn require an X
server on Unixish
+ systems. If you run a server without X, or if you can't connect to
the X server due to
+ security restrictions or policies (a so-called "headless"
environment), SVG rendering
+ will fail.
</p>
- </section>
- <section id="batik">
- <title>Apache Batik</title>
- <p>Current FOP distributions include a distribution of the Apache <a
class="fork" href="ext:batik">Batik</a> version 1.6.
-It is automatically installed with FOP.
-Because Batik's API changes frequently, it is highly recommended that you use
the version that ships with FOP, at least when running FOP.</p>
- <warning>Batik must be run in a graphical environment.</warning>
- <p>Batik must be run in a graphical environment.
-It uses AWT classes for rendering SVG, which in turn require an X server on
Unixish systems.
-If you run a server without X, or if you can't connect to the X server due to
security restrictions or policies (a so-called "headless" environment), SVG
rendering will fail.</p>
<p>Here are some workarounds:</p>
<ul>
- <li>If you are using JDK 1.4, start it with the
<code>-Djava.awt.headless=true</code> command line option.</li>
- <li>Install an X server which provides an in-memory framebuffer
without actually using a screen device or any display hardware. One example is
Xvfb.</li>
- <li>Install a toolkit which emulates AWT without the need for an
underlying X server. One example is the <a
href="http://www.eteks.com/pja/en";>PJA toolkit</a>, which is free and comes
with detailed installation instructions.</li>
- </ul>
- </section>
- </section>
- <section id="bmp">
- <title>BMP</title>
- <p>FOP native support for BMP images is limited to the RGB
color-space.</p>
- </section>
- <section id="eps">
- <title>EPS</title>
- <p>FOP provides support for two output targets:</p>
- <ul>
- <li>PostScript (full support).</li>
- <li>
- PDF (partial support). Due to the lack of a built-in PostScript
interpreter, FOP
- can only embed the EPS file into the PDF. Acrobat Reader will not
currently display
- the EPS (it doesn't have a PostScript interpreter, either) but it
will be shown
- correctly when you print the PDF on a PostScript-capable printer.
PostScript devices
- (including GhostScript) will render the EPS correctly.
- </li>
- </ul>
- <warning>
- Please note that the EPS embedding feature has been
<strong>deprecated</strong> in the
- PDF specification version 1.4. You should not use this feature
anymore, especially
- since newer PDF tools don't support embedded EPS files anymore.
- </warning>
- <p>
- Other output targets can't be supported at the moment because
- FOP lacks a PostScript interpreter. Furthermore, FOP is not able
- to parse the preview bitmaps sometimes contained in EPS files.
- </p>
- </section>
- <section id="jpeg">
- <title>JPEG</title>
- <p>
- FOP native support of JPEG does not include all variants, especially
those containing
- unusual color lookup tables and color profiles.
- If you have trouble with a JPEG image in FOP, try opening it with an
image processing
- program (such as Photoshop or Gimp) and then saving it. Specifying
24-bit color output
- may also help. For the PDF and PostScript renderers most JPEG images
can be passed
- through without decompression. User reports indicate that grayscale,
RGB, and
- CMYK color-spaces are all rendered properly.
- </p>
- </section>
- <section id="png">
- <title>PNG</title>
- <p>
- If using JAI for PNG support, only RGB and RGBA color-spaces are
supported for
- FOP rendering.
- </p>
- <p>
- Transparency is supported but not guaranteed to work with every output
format.
- </p>
- </section>
- <section id="svg">
- <title>SVG</title>
- <section id="svg-intro">
- <title>Introduction</title>
- <p>FOP uses <a href="#batik"> Apache Batik</a> for SVG support.
-This format can be handled as an <code>fo:instream-foreign-object</code> or in
a separate
-file referenced with <code>fo:external-graphic</code>.</p>
- <note>
-Batik's SVG Rasterizer utility may also be used to convert standalone SVG
-documents into PDF. For more information please see the
-<a href="http://xmlgraphics.apache.org/batik/svgrasterizer.html";>SVG
Rasterizer documentation</a>
-on the Batik site.
- </note>
- </section>
- <section id="svg-pdf-graphics">
- <title>Placing SVG Graphics into PDF</title>
- <p>
-The SVG is rendered into PDF by using PDF commands to draw and fill
-lines and curves. This means that the graphical objects created with
-this remain as vector graphics. The same applies to PostScript output.
-For other output formats the SVG graphic will be converted to a bitmap
-image.
- </p>
- <p>
-There are a number of SVG things that cannot be converted directly into
-PDF. Parts of the graphic such as effects, patterns and images are inserted
-into the PDF as a raster graphic. The resolution of these raster images can
- be controlled through the "target resolution" setting in the
- <a href="configuration.html">configuration</a>.</p>
- <p>
-Currently transparency is limited in PDF so many svg images that
-contain effects or graphics with transparent areas may not be displayed
-correctly.
- </p>
- </section>
- <section id="svg-pdf-text">
- <title>Placing SVG Text into PDF and PostScript</title>
- <p>If possible, Batik will use normal PDF or PostScript text when
inserting text. It does
-this by checking if the text can be drawn normally and the font is
-supported. This example svg <a href="../dev/svg/text.svg">text.svg</a> /
-<!--link href="../dev/svg/text.pdf"-->text.pdf<!--/link-->
-shows how various types and effects with text are handled.
-Note that tspan and outlined text are not yet implemented.</p>
- <p>
-Otherwise, text is converted and drawn as a set of shapes by Batik, using the
stroking text painter.
-This means that a typical character will
-have about 10 curves (each curve consists of at least 20 characters).
-This can make the output files large and when it is viewed the
-viewer may not normally draw those fine curves very well (In Adobe Acrobat,
turning on
-"Smooth Line Art" in the preferences will fix this).
-If the text is inserted into the output file using the inbuilt text commands
-it will use a single character.
- </p>
- <p>
- Note that because SVG text can be rendered as either text or a
vector graphic, you
- may need to consider settings in your viewer for both. The Acrobat
viewer has both
- "smooth line art" and "smooth text" settings that may need to be set
for SVG images
- to be displayed nicely on your screen (see Edit / Preferences /
Display).
- This setting will not affect the printing of your document, which
should be OK in
- any case, but will only affect the quality of the screen display.</p>
- </section>
- <section id="svg-scaling">
- <title>Scaling</title>
- <p>
- Currently, SVG images are rendered with the dimensions specified
<em>in the SVG
- file</em>, within the viewport specified in the fo:external-graphic
element.
- For everything to work properly, the two should be equal. The SVG
standard leaves
- this issue as an implementation detail. FOP will probably implement
a scaling
- mechanism in the future.
- </p>
- <p>
- If you use pixels to specify the size of an SVG graphic the "source
resolution" setting
- in the <a href="configuration.html">configuration</a> will be used
to determine the
- size of a pixel. The use of pixels to specify sizes is discouraged
as they may
- be interpreted differently in different environments.
- </p>
- </section>
- <section id="svg-problems">
- <title>Known Problems</title>
- <ul>
- <li>
-Soft mask transparency is combined with white so that it looks better
-on pdf 1.3 viewers but this causes the soft mask to be slightly lighter
-or darker on pdf 1.4 viewers.
- </li>
- <li>
-There is some problem with a gradient inside a pattern causing a PDF
-error when viewed in acrobat 5.
- </li>
<li>
-Text is not always handled correctly, it may select the wrong font
-especially if characters have multiple fonts in the font list.
+ If you are using JDK 1.4, start it with the
<code>-Djava.awt.headless=true</code>
+ command line option.
</li>
<li>
-More PDF text handling could be implemented.
-It could draw the string using the attributed character iterator
-to handle tspans and other simple changes of text.
+ Install an X server which provides an in-memory framebuffer
without actually using a
+ screen device or any display hardware. One example is Xvfb.
</li>
<li>
-JPEG images are not inserted directly into the pdf document.
-This area has not been implemented yet since the appropriate
-method in batik is static.
- </li>
- <li>
-Uniform transparency for images and other svg elements that are converted
-into a raster graphic are not drawn properly in PDF. The image is opaque.
+ Install a toolkit which emulates AWT without the need for an
underlying X server. One
+ example is the <a href="http://www.eteks.com/pja/en";>PJA
toolkit</a>, which is free
+ and comes with detailed installation instructions.
</li>
</ul>
</section>
</section>
- <section id="tiff">
- <title>TIFF</title>
- <p>
- FOP-native TIFF support is limited to PDF and PostScript output only.
Also,
- according to user reports, FOP's native support for TIFF is limited to
images with the
- following characteristics (all must be true for successful rendering):
- </p>
- <ul>
- <li>single channel images (i.e., bi-level and grayscale only)</li>
- <li>uncompressed images, or images using CCITT T.4, CCITT T.6, or JPEG
compression</li>
- <li>images using white-is-zero encoding in the TIFF
PhotometricInterpretation tag</li>
- </ul>
- <note>
- Native support in this case means that the images can be embedded into
the output format
- without decoding it.
- </note>
- <p><em>JAI:</em> Supports RGB and RGBA only for FOP rendering.</p>
- </section>
- <section id="emf">
- <title>EMF</title>
- <p>Windows Enhanced Metafiles (EMF) are only supported in RTF output.</p>
+ <section id="image-formats">
+ <title>Details on image formats</title>
+ <section id="bmp">
+ <title>BMP</title>
+ <p>
+ BMP images are supported through an Image I/O codec. There may be
limitations of the
+ codec which are outside the control of Apache FOP.
+ </p>
+ </section>
+ <section id="emf">
+ <title>EMF</title>
+ <p>
+ Windows Enhanced Metafiles (EMF) are only supported in RTF output
where they are
+ embedded without decoding.
+ </p>
+ </section>
+ <section id="eps">
+ <title>EPS</title>
+ <p>Apache FOP allows to use EPS files when generating PostScript
output only.</p>
+ <p>
+ Other output targets can't be supported at the moment because
+ FOP lacks a PostScript interpreter. Furthermore, FOP is currently
not able
+ to parse the preview bitmaps sometimes contained in EPS files.
+ </p>
+ </section>
+ <section id="gif">
+ <title>GIF</title>
+ <p>
+ GIF images are supported through an Image I/O codec.
Transparency is supported but
+ not guaranteed to work with every output format.
+ </p>
+ </section>
+ <section id="jpeg">
+ <title>JPEG</title>
+ <p>
+ FOP native support (i.e. the handling of undecoded images) of JPEG
does not include all
+ variants, especially those containing unusual color lookup tables
and color profiles.
+ If you have trouble with a JPEG image in FOP, try opening it with an
image processing
+ program (such as Photoshop or Gimp) and then saving it. Specifying
24-bit color output
+ may also help. For the PDF and PostScript renderers most JPEG images
can be passed
+ through without decompression. User reports indicate that grayscale,
RGB, and
+ CMYK color spaces are all rendered properly. However, for other
output formats, the
+ JPEG images have to be decompressed. Tests have shown that there are
some limitation
+ in some Image I/O codecs concerning images in the CMYK color
space. Work-arounds are
+ in place but may not always work as expected.
+ </p>
+ </section>
+ <section id="png">
+ <title>PNG</title>
+ <p>
+ PNG images are supported through an Image I/O codec.
Transparency is supported but
+ not guaranteed to work with every output format.
+ </p>
+ </section>
+ <section id="svg">
+ <title>SVG</title>
+ <section id="svg-intro">
+ <title>Introduction</title>
+ <p>FOP uses <a href="#batik"> Apache Batik</a> for SVG support.
+ This format can be handled as an
<code>fo:instream-foreign-object</code> or in a separate
+ file referenced with <code>fo:external-graphic</code>.</p>
+ <note>
+ Batik's SVG Rasterizer utility may also be used to convert
standalone SVG
+ documents into PDF. For more information please see the
+ <a
href="http://xmlgraphics.apache.org/batik/svgrasterizer.html";>SVG Rasterizer
documentation</a>
+ on the Batik site.
+ </note>
+ </section>
+ <section id="svg-pdf-graphics">
+ <title>Placing SVG Graphics into PDF</title>
+ <p>
+ The SVG is rendered into PDF by using PDF commands to draw and fill
+ lines and curves. This means that the graphical objects created
with
+ this remain as vector graphics. The same applies to PostScript
output.
+ For other output formats the SVG graphic may be converted to a
bitmap
+ image.
+ </p>
+ <p>
+ There are a number of SVG things that cannot be converted directly
into
+ PDF. Parts of the graphic such as effects, patterns and images are
inserted
+ into the PDF as a raster graphic. The resolution of these raster
images can
+ be controlled through the "target resolution" setting in the
+ <a href="configuration.html">configuration</a>.</p>
+ <p>
+ Currently transparency is limited in PDF so many SVG images that
+ contain effects or graphics with transparent areas may not be
displayed
+ correctly.
+ </p>
+ </section>
+ <section id="svg-pdf-text">
+ <title>Placing SVG Text into PDF and PostScript</title>
+ <p>If possible, Batik will use normal PDF or PostScript text when
inserting text. It does
+ this by checking if the text can be drawn normally and the font is
+ supported. This example svg <a
href="../dev/svg/text.svg">text.svg</a> /
+ <!--link href="../dev/svg/text.pdf"-->text.pdf<!--/link-->
+ shows how various types and effects with text are handled.
+ Note that tspan and outlined text are not yet implemented.</p>
+ <p>
+ Otherwise, text is converted and drawn as a set of shapes by
Batik, using the
+ stroking text painter. This means that a typical character will
+ have about 10 curves (each curve consists of at least 20
characters).
+ This can make the output files large and when it is viewed the
+ viewer may not normally draw those fine curves very well (In Adobe
Acrobat, turning on
+ "Smooth Line Art" in the preferences will fix this). Copy/paste
functionality
+ will not be supported in this case.
+ If the text is inserted into the output file using the inbuilt
text commands
+ it will use a single character.
+ </p>
+ <p>
+ Note that because SVG text can be rendered as either text or a
vector graphic, you
+ may need to consider settings in your viewer for both. The Acrobat
viewer has both
+ "smooth line art" and "smooth text" settings that may need to be
set for SVG images
+ to be displayed nicely on your screen (see Edit / Preferences /
Display).
+ This setting will not affect the printing of your document, which
should be OK in
+ any case, but will only affect the quality of the screen
display.</p>
+ </section>
+ <section id="svg-scaling">
+ <title>Scaling</title>
+ <p>
+ Currently, SVG images are rendered with the dimensions specified
<em>in the SVG
+ file</em>, within the viewport specified in the
fo:external-graphic element.
+ For everything to work properly, the two should be equal. The SVG
standard leaves
+ this issue as an implementation detail. Additional scaling options
are available
+ through XSL-FO means.
+ </p>
+ <p>
+ If you use pixels to specify the size of an SVG graphic the
"source resolution" setting
+ in the <a href="configuration.html">configuration</a> will be used
to determine the
+ size of a pixel. The use of pixels to specify sizes is discouraged
as they may
+ be interpreted differently in different environments.
+ </p>
+ </section>
+ <section id="svg-problems">
+ <title>Known Problems</title>
+ <ul>
+ <li>
+ Soft mask transparency is combined with white so that it looks
better
+ on PDF 1.3 viewers but this causes the soft mask to be slightly
lighter
+ or darker on PDF 1.4 viewers.
+ </li>
+ <li>
+ There is some problem with a gradient inside a pattern which may
cause a PDF
+ error when viewed in Acrobat 5.
+ </li>
+ <li>
+ Text is not always handled correctly, it may select the wrong
font
+ especially if characters have multiple fonts in the font list.
+ </li>
+ <li>
+ Uniform transparency for images and other SVG elements that are
converted
+ into a raster graphic are not drawn properly in PDF. The image
is opaque.
+ </li>
+ </ul>
+ </section>
+ </section>
+ <section id="tiff">
+ <title>TIFF</title>
+ <p>
+ FOP can embed TIFF images without decompression into PDF, PostScript
and AFP if they
+ have either CCITT T.4, CCITT T.6, or JPEG compression. Otherwise, a
TIFF-capable
+ Image I/O codec is necessary for decoding the image.
+ </p>
+ <p>
+ There may be some limitation concerning images in the CMYK color
space.
+ </p>
+ </section>
+ <section id="wmf">
+ <title>WMF</title>
+ <p>
+ Windows Metafiles (WMF) are supported through classes in
+ <a href="ext:xmlgraphics.apache.org/batik">Apache Batik</a>. At the
moment, support
+ for this format is experimental and may not always work as expected.
+ </p>
+ </section>
</section>
<section id="resolution">
<title>Graphics Resolution</title>
@@ -371,7 +506,8 @@
</p>
<p>
Please note that not all images contain resolution information. If
it's not available
- 72 dpi is assumed (the default resolution of PDF and PostScript).
+ the source resolution set on the FopFactory (or through the user
configuration XML) is used.
+ The default here is 72 dpi.
</p>
<p>
Bitmap images are generally embedded into the output format at their
original resolution
@@ -382,14 +518,23 @@
used as a work-around to resample images in FO documents.
</p>
</section>
+ <section id="page-selection">
+ <title>Page selection for multi-page formats</title>
+ <p>
+ Some image formats such as TIFF support multiple pages/sub-images per
file. You can
+ select a particular page using a special URI fragment in the form:
+ <uri>#page=<nr>
+ (for example: <code>http://localhost/images/myimage.tiff#page=3</code>)
+ </p>
+ </section>
<section id="caching">
<title>Image caching</title>
<p>
FOP caches images between runs. There is one cache per FopFactory
instance. The URI is
used as a key to identify images which means that when a particular
URI appears again,
the image is taken from the cache. If you have a servlet that
generates a different
- image each time it is called with the same URL you need to use a
constantly
- changing dummy parameter on the URL to avoid caching.
+ image each time it is called with the same URI you need to use a
constantly
+ changing dummy parameter on the URI to avoid caching.
</p>
<p>
The image cache has been improved considerably in the redesigned code.
Therefore, a
Modified:
xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/running.xml
URL:
http://svn.apache.org/viewvc/xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/running.xml?rev=614156&r1=614155&r2=614156&view=diff
==============================================================================
--- xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/running.xml
(original)
+++ xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/running.xml Tue
Jan 22 01:26:05 2008
@@ -28,21 +28,24 @@
<title>System Requirements</title>
<p>The following software must be installed:</p>
<ul>
- <li>Java 1.3.x or later Runtime Environment.</li>
+ <li>
+ Java 1.4.x or later Runtime Environment.
+ <ul>
+ <li>
+ Many JREs >=1.4 contain older JAXP implementations (which often
contain bugs). It's
+ usually a good idea to replace them with a current
implementation.
+ </li>
+ </ul>
+ </li>
<li>
Apache FOP. The <a href="../download.html">FOP distribution</a>
includes all libraries that you will
need to run a basic FOP installation. These can be found in the
[fop-root]/lib directory. These
libraries include the following:
<ul>
- <li>
- A JAXP-compatible XML Parser (FOP comes with <a class="fork"
href="ext:xerces">Apache Xerces-J</a>).
- </li>
- <li>
- A JAXP-compatible XSLT Processor (FOP comes with <a class="fork"
href="ext:xalan">Apache Xalan-J</a>).
- </li>
+ <li><a class="fork"
href="ext:xmlgraphics.apache.org/commons">Apache XML Graphics Commons</a>, an
shared library for Batik and FOP.</li>
<li><a class="fork" href="ext:batik">Apache Batik</a>, an SVG
library.</li>
- <li><a class="fork" href="ext:jakarta/commons/logging">Apache
Jakarta Commons Logging</a>, a logger abstraction kit.</li>
- <li><a class="fork" href="ext:jakarta/commons/io">Apache Jakarta
Commons IO</a>, a library with I/O utilities.</li>
+ <li><a class="fork" href="ext:commons-logging">Apache Commons
Logging</a>, a logger abstraction kit.</li>
+ <li><a class="fork" href="ext:commons-io">Apache Commons IO</a>, a
library with I/O utilities.</li>
<li><a class="fork" href="ext:excalibur/framework">Apache
Excalibur/Avalon Framework</a>, for XML configuration handling.</li>
</ul>
</li>
@@ -51,8 +54,7 @@
<ul>
<li>
Graphics libraries. Generally, FOP contains direct support for the
most important
- bitmap image formats (including PNG, TIFF, JPEG and GIF). If you're
using JDK 1.3,
- you may need additional packages to get GIF images to work. See
+ bitmap image formats (including PNG, JPEG and GIF). See
<a href="graphics.html">FOP: Graphics Formats</a> for details.
</li>
<li>
Modified:
xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/servlets.xml
URL:
http://svn.apache.org/viewvc/xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/servlets.xml?rev=614156&r1=614155&r2=614156&view=diff
==============================================================================
--- xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/servlets.xml
(original)
+++ xmlgraphics/fop/trunk/src/documentation/content/xdocs/trunk/servlets.xml
Tue Jan 22 01:26:05 2008
@@ -161,7 +161,7 @@
<ul>
<li>
Instead of java.io.ByteArrayOutputStream consider using the
ByteArrayOutputStream
- implementation from the <a href="ext:jakarta/commons/io">Jakarta
Commons IO project</a> which allocates less memory.
+ implementation from the <a href="ext:commons-io">Jakarta Commons
IO project</a> which allocates less memory.
The full class name is:
<code>org.apache.commons.io.output.ByteArrayOutputStream</code>
</li>
<li>
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