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From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (PDFBOX-3854) PDDeviceRGB.toRGBImage does not return a RGB-Typed-Image
Date Wed, 05 Jul 2017 16:47:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-3854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16073902#comment-16073902
] 

Tilman Hausherr edited comment on PDFBOX-3854 at 7/5/17 4:46 PM:
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I'll analyse your change to see if it is faster in my multithreaded test suite of about 1000
PDF files. Your observation re type_custom is similar to one made here a few weeks ago in
PDFBOX-3768.

Did you use the  {{-Dsun.java2d.cmm=sun.java2d.cmm.kcms.KcmsServiceProvider}} setting? What
PDFBox version are you using?


was (Author: tilman):
I'll analyse your change to see if it is faster in my multithreaded test suite of about 1000
PDF files. Your observation re type_custom is similar to one made here a few weeks ago.

Did you use the  {{-Dsun.java2d.cmm=sun.java2d.cmm.kcms.KcmsServiceProvider}} setting? What
PDFBox version are you using?

> PDDeviceRGB.toRGBImage does not return a RGB-Typed-Image
> --------------------------------------------------------
>
>                 Key: PDFBOX-3854
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3854
>             Project: PDFBox
>          Issue Type: Bug
>    Affects Versions: 2.0.6
>            Reporter: Yannick Haser
>         Attachments: rgbImageExample0.pdf, rgbImageSecondExample.pdf, Starter2.java,
Starter.java
>
>
> While converting a PDPage to a BufferedImage (using the PDFRenderer) Images-Resources
located in the PDPage gets loaded in a WriteableRaster and a given Colorspace.
> These get converted to a BufferedImage (with PDDeviceRGB.toRGBImage()). But the Type
of the returing BufferedImage is with the given Raster and Colorspace always from Type "BufferedImage.TYPE_CUSTOM"
instead of the expected "BufferedImage.TYPE_INT_RGB" for example.
> Consequences:
> Image-Processing-Operations with/on BufferedImages with TYPE_CUSTOM are not optimized
in Java (slower) and partialy runs through "Synchronized" Blocks.
> ==> Converting different Documents in different Threads are blocking each other.
> "Quick"-Fix for seeing a Performance-Improvement in a Multithreading Environment:
> {code:title=PDDeviceRGB.java|borderStyle=solid}
> @Override
> public BufferedImage toRGBImage(WritableRaster raster) throws IOException {
> 	init();
> 	ColorModel colorModel = new ComponentColorModel(awtColorSpace, false, false, Transparency.OPAQUE,
> 			raster.getDataBuffer().getDataType());
> 	BufferedImage image = new BufferedImage(colorModel, raster, false, null);
> 	BufferedImage dest = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB);
> 	ColorConvertOp op = new ColorConvertOp(dest.getColorModel().getColorSpace(), null);
> 	return op.filter(image, dest);
> }
> {code}



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