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Posted to commits@pdfbox.apache.org by ti...@apache.org on 2014/10/21 20:05:06 UTC
svn commit: r1633427 -
/pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/pdmodel/CreateGradientShadingPDF.java
Author: tilman
Date: Tue Oct 21 18:05:06 2014
New Revision: 1633427
URL: http://svn.apache.org/r1633427
Log:
PDFBOX-2444, PDFBOX-2370: add radial shading; use both methods of adding a shading to the resources
Modified:
pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/pdmodel/CreateGradientShadingPDF.java
Modified: pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/pdmodel/CreateGradientShadingPDF.java
URL: http://svn.apache.org/viewvc/pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/pdmodel/CreateGradientShadingPDF.java?rev=1633427&r1=1633426&r2=1633427&view=diff
==============================================================================
--- pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/pdmodel/CreateGradientShadingPDF.java (original)
+++ pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/pdmodel/CreateGradientShadingPDF.java Tue Oct 21 18:05:06 2014
@@ -15,7 +15,10 @@
*/
package org.apache.pdfbox.examples.pdmodel;
+import java.awt.image.BufferedImage;
+import java.io.File;
import java.io.IOException;
+import javax.imageio.ImageIO;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSFloat;
@@ -27,11 +30,14 @@ import org.apache.pdfbox.pdmodel.PDResou
import org.apache.pdfbox.pdmodel.common.function.PDFunctionType2;
import org.apache.pdfbox.pdmodel.edit.PDPageContentStream;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB;
+import org.apache.pdfbox.pdmodel.graphics.shading.PDShading;
import org.apache.pdfbox.pdmodel.graphics.shading.PDShadingType2;
+import org.apache.pdfbox.pdmodel.graphics.shading.PDShadingType3;
+import org.apache.pdfbox.rendering.PDFRenderer;
/**
- * This example creates a PDF with type 2 (axial) shading with a type 2
- * (exponential) function.
+ * This example creates a PDF with type 2 (axial) and 3 (radial) shadings with a
+ * type 2 (exponential) function.
*
* @author Tilman Hausherr
*/
@@ -54,7 +60,8 @@ public class CreateGradientShadingPDF
PDPage page = new PDPage();
document.addPage(page);
- // function attributes
+ // type 2 (exponential) function with attributes
+ // can be used by both shadings
COSDictionary fdict = new COSDictionary();
fdict.setInt(COSName.FUNCTION_TYPE, 2);
COSArray domain = new COSArray();
@@ -74,30 +81,61 @@ public class CreateGradientShadingPDF
fdict.setInt(COSName.N, 1);
PDFunctionType2 func = new PDFunctionType2(fdict);
- PDShadingType2 shading = new PDShadingType2(new COSDictionary());
+ // axial shading with attributes
+ PDShadingType2 axialShading = new PDShadingType2(new COSDictionary());
+ axialShading.setColorSpace(PDDeviceRGB.INSTANCE);
+ axialShading.setShadingType(PDShading.SHADING_TYPE2);
+ COSArray coords1 = new COSArray();
+ coords1.add(COSInteger.get(100));
+ coords1.add(COSInteger.get(400));
+ coords1.add(COSInteger.get(400));
+ coords1.add(COSInteger.get(600));
+ axialShading.setCoords(coords1);
+ axialShading.setFunction(func);
+
+ // radial shading with attributes
+ PDShadingType3 radialShading = new PDShadingType3(new COSDictionary());
+ radialShading.setColorSpace(PDDeviceRGB.INSTANCE);
+ radialShading.setShadingType(PDShading.SHADING_TYPE3);
+ COSArray coords2 = new COSArray();
+ coords2.add(COSInteger.get(100));
+ coords2.add(COSInteger.get(400));
+ coords2.add(COSInteger.get(50)); // radius1
+ coords2.add(COSInteger.get(400));
+ coords2.add(COSInteger.get(600));
+ coords2.add(COSInteger.get(150)); // radius2
+ radialShading.setCoords(coords2);
+ radialShading.setFunction(func);
+
+ // create resources
+ PDResources resources = new PDResources();
+ page.setResources(resources);
+
+ // add shading to resources
- // shading attributes
- shading.setColorSpace(PDDeviceRGB.INSTANCE);
- shading.setShadingType(PDShadingType2.SHADING_TYPE2);
- COSArray coords = new COSArray();
- coords.add(COSInteger.get(100));
- coords.add(COSInteger.get(400));
- coords.add(COSInteger.get(400));
- coords.add(COSInteger.get(600));
- shading.setCoords(coords);
- shading.setFunction(func);
-
- // create and add to shading resources
- page.setResources(new PDResources());
- page.getResources().put(COSName.getPDFName("sh1"), shading);
+ // use put() if you want a specific name
+ resources.put(COSName.getPDFName("shax"), axialShading);
+
+ // use add() if you want PDFBox to decide the name for you
+ COSName radialShadingName = resources.add(radialShading);
// invoke shading from content stream
+ // the raw command is "/name sh"
+ // replace "name" with the name of the shading
+ // compress parameter is set to false so that you can see the stream in a text editor
PDPageContentStream contentStream = new PDPageContentStream(document, page, true, false);
- contentStream.appendRawCommands("/sh1 sh\n");
+ contentStream.appendRawCommands("/shax sh\n");
+ contentStream.appendRawCommands("/" + radialShadingName.getName() + " sh\n");
contentStream.close();
document.save(file);
document.close();
+
+ // render the PDF and save it into a PNG file
+ document = PDDocument.loadNonSeq(new File(file));
+ BufferedImage bim = new PDFRenderer(document).renderImageWithDPI(0, 300);
+ ImageIO.write(bim, "png", new File(file + ".png"));
+ document.close();
}
finally
{