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https://issues.apache.org/jira/browse/PDFBOX-1444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
John Hewson closed PDFBOX-1444.
-------------------------------
Resolution: Fixed
Fix Version/s: 2.0.0
We fixed this in 2.0 in a different way. There's a new PDFGraphicsStreamEngine
class which can be subclasses in order to gain access to graphics. PageDrawer
itself in now completely internal to PDFBox.
> Capability to use custom PageDrawer in PDPage.convertToImage
> ------------------------------------------------------------
>
> Key: PDFBOX-1444
> URL: https://issues.apache.org/jira/browse/PDFBOX-1444
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel, Rendering
> Affects Versions: 1.8.0
> Environment: Ubuntu 11.10 64 bit on Intel® Core™ i5-2430M CPU. Sun
> JDK "1.6.0_30" (build 1.6.0_30-b12) Java HotSpot(TM) 64-Bit Server VM (build
> 20.5-b03, mixed mode).
> Reporter: Ravi Hegde
> Fix For: 2.0.0
>
>
> Extending PageDrawer is a handy technique for PDF processing tools to get
> information about the elements drawn on the page while drawing the page in
> one go. However, PDPage.convertToImage has no way of plugging in the extended
> PageDrawer class. It is necessary to provide some way to use custom
> PageDrawer instance in PDPage.convertToImage. Overloaded
> PDPage.convertToImage with a PageDrawer instance may be a good option. Here
> is the patch:
> svn diff PDPage.java
> Index: PDPage.java
> ===================================================================
> --- PDPage.java (revision 1407714)
> +++ PDPage.java (working copy)
> @@ -699,6 +699,24 @@
> */
> public BufferedImage convertToImage(int imageType, int resolution)
> throws IOException
> {
> + PageDrawer drawer = new PageDrawer();
> + return convertToImage(imageType, resolution, drawer);
> + }
> +
> + /**
> + * Convert this page to an output image using custom PageDrawer
> instance.
> + * Custom page drawer is useful for collecting information about the
> + * elements drawn on the page while drawing the page.
> + *
> + * @param imageType the image type (see {@link BufferedImage}.TYPE_*)
> + * @param resolution the resolution in dpi (dots per inch)
> + * @param drawer Custom {@link PageDrawer} instance.
> + * @return A graphical representation of this page.
> + *
> + * @throws IOException If there is an error drawing to the image.
> + */
> + public BufferedImage convertToImage(int imageType, int resolution,
> PageDrawer drawer) throws IOException
> + {
> PDRectangle cropBox = findCropBox();
> float widthPt = cropBox.getWidth();
> float heightPt = cropBox.getHeight();
> @@ -753,7 +771,6 @@
> graphics.rotate((float)Math.toRadians(rotationAngle));
> }
> graphics.scale( scaling, scaling );
> - PageDrawer drawer = new PageDrawer();
> drawer.drawPage( graphics, this, pageDimension );
>
> return retval;
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