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PPTX2PNG - SVG export 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1874065 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andreas Beeker 2020-02-15 22:21:30 +00:00
parent dacc3004e2
commit 556347f3a8
2 changed files with 92 additions and 24 deletions
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90
src/ooxml/java/org/apache/poi/xslf/util/PPTX2PNG.java
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@ -20,10 +20,12 @@
package org.apache.poi.xslf.util;
import java.awt.AlphaComposite;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Dimension2D;
import java.awt.image.BufferedImage;
import java.io.Closeable;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
@ -35,12 +37,16 @@ import java.util.regex.Pattern;
import javax.imageio.ImageIO;
import org.apache.batik.dom.GenericDOMImplementation;
import org.apache.batik.svggen.SVGGraphics2D;
import org.apache.poi.common.usermodel.GenericRecord;
import org.apache.poi.poifs.filesystem.FileMagic;
import org.apache.poi.sl.draw.Drawable;
import org.apache.poi.sl.draw.EmbeddedExtractor.EmbeddedPart;
import org.apache.poi.util.Dimension2DDouble;
import org.apache.poi.util.GenericRecordJsonWriter;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
/**
* An utility to convert slides of a .pptx slide show to a PNG image
@ -62,7 +68,7 @@ public final class PPTX2PNG {
" -scale <float> scale factor\n" +
" -fixSide <side> specify side (long,short,width,height) to fix - use <scale> as amount of pixels\n" +
" -slide <integer> 1-based index of a slide to render\n" +
" -format <type> png,gif,jpg (,null for testing)\n" +
" -format <type> png,gif,jpg,svg (,null for testing)\n" +
" -outdir <dir> output directory, defaults to origin of the ppt/pptx file\n" +
" -outfile <file> output filename, defaults to '"+OUTPUT_PAT_REGEX+"'\n" +
" -outpat <pattern> output filename pattern, defaults to '"+OUTPUT_PAT_REGEX+"'\n" +
@ -175,7 +181,7 @@ public final class PPTX2PNG {
return false;
}
if (format == null || !format.matches("^(png|gif|jpg|null)$")) {
if (format == null || !format.matches("^(png|gif|jpg|null|svg)$")) {
usage("Invalid format given");
return false;
}
@ -216,6 +222,8 @@ public final class PPTX2PNG {
System.out.println("Processing " + file);
}
try (MFProxy proxy = initProxy(file)) {
final Set<Integer> slidenum = proxy.slideIndexes(slidenumStr);
if (slidenum.isEmpty()) {
@ -239,8 +247,8 @@ public final class PPTX2PNG {
extractEmbedded(proxy, slideNo);
BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics = img.createGraphics();
try (OutputFormat outputFormat = ("svg".equals(format)) ? new SVGFormat() : new BitmapFormat(format)) {
Graphics2D graphics = outputFormat.getGraphics2D(width, height);
// default rendering options
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
@ -248,7 +256,6 @@ public final class PPTX2PNG {
graphics.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_SPEED);
graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
graphics.setRenderingHint(Drawable.BUFFERED_IMAGE, new WeakReference<>(img));
graphics.scale(scale / lenSide, scale / lenSide);
@ -259,13 +266,8 @@ public final class PPTX2PNG {
// draw stuff
proxy.draw(graphics);
// save the result
if (!"null".equals(format)) {
ImageIO.write(img, format, new File(outdir, calcOutFile(proxy, slideNo)));
outputFormat.writeOut(proxy, slideNo);
}
graphics.dispose();
img.flush();
}
} catch (NoScratchpadException e) {
usage("'"+file.getName()+"': Format not supported - try to include poi-scratchpad.jar into the CLASSPATH.");
@ -393,4 +395,70 @@ public final class PPTX2PNG {
super(cause);
}
}
private interface OutputFormat extends Closeable {
Graphics2D getGraphics2D(double width, double height);
void writeOut(MFProxy proxy, int slideNo) throws IOException;
}
private class SVGFormat implements OutputFormat {
static final String svgNS = "http://www.w3.org/2000/svg";
private SVGGraphics2D svgGenerator;
@Override
public Graphics2D getGraphics2D(double width, double height) {
// Get a DOMImplementation.
DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
// Create an instance of org.w3c.dom.Document.
Document document = domImpl.createDocument(svgNS, "svg", null);
svgGenerator = new SVGGraphics2D(document);
svgGenerator.setSVGCanvasSize(new Dimension((int)width, (int)height));
return svgGenerator;
}
@Override
public void writeOut(MFProxy proxy, int slideNo) throws IOException {
File outfile = new File(outdir, calcOutFile(proxy, slideNo));
svgGenerator.stream(outfile.getCanonicalPath(), true);
}
@Override
public void close() throws IOException {
svgGenerator.dispose();
}
}
private class BitmapFormat implements OutputFormat {
private final String format;
private BufferedImage img;
private Graphics2D graphics;
BitmapFormat(String format) {
this.format = format;
}
@Override
public Graphics2D getGraphics2D(double width, double height) {
img = new BufferedImage((int)width, (int)height, BufferedImage.TYPE_INT_ARGB);
graphics = img.createGraphics();
graphics.setRenderingHint(Drawable.BUFFERED_IMAGE, new WeakReference<>(img));
return graphics;
}
@Override
public void writeOut(MFProxy proxy, int slideNo) throws IOException {
if (!"null".equals(format)) {
ImageIO.write(img, format, new File(outdir, calcOutFile(proxy, slideNo)));
}
}
@Override
public void close() throws IOException {
if (graphics != null) {
graphics.dispose();
img.flush();
}
}
}
}

2
src/ooxml/testcases/org/apache/poi/xslf/usermodel/TestPPTX2PNG.java
View File

@ -76,7 +76,7 @@ public class TestPPTX2PNG {
assumeFalse("ignore HSLF (.ppt) / HEMF (.emf) / HWMF (.wmf) files in no-scratchpad run", xslfOnly && pptFile.matches(".*\\.(ppt|emf|wmf)$"));
String[] args = {
"-format", "null", // png,gif,jpg or null for test
"-format", "null", // png,gif,jpg,svg or null for test
"-slide", "-1", // -1 for all
"-outdir", new File("build/tmp/").getCanonicalPath(),
"-outpat", "${basename}-${slideno}-${ext}.${format}",