Author: kiwiwings
Date: Sun Dec 1 23:09:58 2019
New Revision: 1870695
URL: http://svn.apache.org/viewvc?rev=1870695&view=rev
Log:
add rendering info actually ...
Added:
poi/site/publish/components/slideshow/ppt-wmf-emf-renderer.html
Added: poi/site/publish/components/slideshow/ppt-wmf-emf-renderer.html
URL:
http://svn.apache.org/viewvc/poi/site/publish/components/slideshow/ppt-wmf-emf-renderer.html?rev=1870695&view=auto
==============================================================================
--- poi/site/publish/components/slideshow/ppt-wmf-emf-renderer.html (added)
+++ poi/site/publish/components/slideshow/ppt-wmf-emf-renderer.html Sun Dec 1
23:09:58 2019
@@ -0,0 +1,668 @@
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+ +-->
+<div id="content">
+<h1>Rendering slideshows, WMF, EMF and EMF+</h1>
+<div id="front-matter"></div>
+
+<a name="Rendering+slideshows%2C+WMF%2C+EMF+and+EMF%2B"></a>
+<h2 class="boxed">Rendering slideshows, WMF, EMF and EMF+</h2>
+<div class="section">
+<p>
+ For rendering slideshow (HSLF/XSLF), WMF, EMF and EMF+
pictures, POI provides an utility class
+ <a
href="https://svn.apache.org/viewvc/poi/trunk/src/ooxml/java/org/apache/poi/xslf/util/PPTX2PNG.java?view=markup";>
+ PPTX2PNG</a>:
+ </p>
+<div class="code">
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">Usage: PPTX2PNG [options]
<ppt or pptx file or 'stdin'</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">Options:</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -scale <float>
scale factor</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -fixSide <side>
specify side (long,short,width,height) to fix - use <scale> as amount of
pixels</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -slide <integer>
1-based index of a slide to render</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -format <type>
png,gif,jpg (,null for testing)</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -outdir <dir>
output directory, defaults to origin of the ppt/pptx file</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -outfile <file>
output filename, defaults to "${basename}-${slideno}.${format}"</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -outpat <pattern>
output filename pattern, defaults to "${basename}-${slideno}.${format}"</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
patterns: basename, slideno, format, ext</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -dump <file>
dump the annotated records to a file</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -quiet do
not write to console (for normal processing)</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -ignoreParse
ignore parsing error and continue with the records read until the error</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> -extractEmbedded
extract embedded parts</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+</div>
+</div>
+
+<a name="Integrate+rendering+in+your+code"></a>
+<h2 class="boxed">Integrate rendering in your code</h2>
+<div class="section">
+<a name="%231+-+Use+PPTX2PNG+via+file+or+stdin"></a>
+<h3 class="boxed">#1 - Use PPTX2PNG via file or stdin</h3>
+<p>For file system access, you need to save your slideshow/WMF/EMF/EMF+ first
to disc and then call <span class="codefrag">
+ PPTX2PNG.main()
+ </span> with the corresponding parameters.
+ </p>
+<p>for stdin access, you need to redirect <span
class="codefrag">System.in</span> before:
+ </p>
+<div class="code">
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">/* the file content
*/</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">InputStream is = ...;</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">/* Save and set System.in
*/</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">InputStream oldIn =
System.in;</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">try {</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> System.setIn(is);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> String[] args = {</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> "-format", "png",
// png,gif,jpg or null for test</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> "-outdir", new
File("out/").getCanonicalPath(),</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> "-outfile",
"export.png",</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> "-fixside",
"long",</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> "-scale",
"800",</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
"-ignoreParse",</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> "stdin"</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> };</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
PPTX2PNG.main(args);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">} finally {</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
System.setIn(oldIn);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">}</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+</div>
+<a name="%232+-+Render+WMF+%2F+EMF+%2F+EMF%2B+via+the+*Picture+classes"></a>
+<h3 class="boxed">#2 - Render WMF / EMF / EMF+ via the *Picture classes</h3>
+<div class="code">
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">File f =
samples.getFile("santa.wmf");</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">try (FileInputStream fis =
new FileInputStream(f)) {</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> // for WMF</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> HwmfPicture wmf = new
HwmfPicture(fis);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> // for EMF / EMF+</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> HemfPicture emf = new
HemfPicture(fis);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> Dimension dim =
wmf.getSize();</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> int width =
Units.pointsToPixel(dim.getWidth());</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> // keep aspect ratio
for height</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> int height =
Units.pointsToPixel(dim.getHeight());</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> double max =
Math.max(width, height);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> if (max > 1500)
{</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> width *=
1500/max;</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> height *=
1500/max;</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> }</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> BufferedImage bufImg =
new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> Graphics2D g =
bufImg.createGraphics();</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
g.setRenderingHint(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BICUBIC);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
g.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
RenderingHints.VALUE_FRACTIONALMETRICS_ON);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> wmf.draw(g, new
Rectangle2D.Double(0,0,width,height));</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> g.dispose();</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> ImageIO.write(bufImg,
"PNG", new File("bla.png"));</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">}</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+</div>
+<a name="%233+-+Render+slideshows+directly"></a>
+<h3 class="boxed">#3 - Render slideshows directly</h3>
+<div class="code">
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">File file = new
File("example.pptx");</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">double scale = 1.5;</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">try (SlideShow<?, ?>
ss = SlideShowFactory.create(file, null, true)) {</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> Dimension pgsize =
ss.getPageSize();</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> int width = (int)
(pgsize.width * scale);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> int height = (int)
(pgsize.height * scale);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> for (Slide<?, ?>
slide : ss.getSlides()) {</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> BufferedImage img =
new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> Graphics2D graphics
= img.createGraphics();</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> // default
rendering options</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
graphics.setRenderingHint(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BICUBIC);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
RenderingHints.VALUE_FRACTIONALMETRICS_ON);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
graphics.setRenderingHint(Drawable.BUFFERED_IMAGE, new
WeakReference<>(img));</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
graphics.scale(scale, scale);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> // draw stuff</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
slide.draw(graphics);</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> ImageIO.write(img,
"PNG", new File("output.png"));</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">
graphics.dispose();</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> img.flush();</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"> }</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody">}</span>
+</div>
+<div class="codeline">
+<span class="lineno"></span><span class="codebody"></span>
+</div>
+</div>
+</div>
+
+</div>
+<!--+
+ |end content
+ +-->
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+ 2001-2019 <a href="https://www.apache.org/";>The Apache Software
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+</div>
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