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Date: Tue, 4 Jul 2017 17:28:01 +0000 (UTC)
From: "Yannick Haser (JIRA)" <jira@apache.org>
To: dev@pdfbox.apache.org
Message-ID: <JIRA.13084479.1499161501000.168339.1499189281432@Atlassian.JIRA>
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Subject: [jira] [Commented] (PDFBOX-3854) PDDeviceRGB.toRGBImage does not
 return a RGB-Typed-Image
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archived-at: Tue, 04 Jul 2017 17:28:07 -0000


    [ https://issues.apache.org/jira/browse/PDFBOX-3854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16073943#comment-16073943 ] 

Yannick Haser commented on PDFBOX-3854:
---------------------------------------

PDFBox Version 2.0.6. 

I did not use any flags (just a plain old new Maven-Project in Eclipse).

And my "Quickfix" is not a optimized one I think. Most likely it would be better to convert the Raster itself before creating the bufferedimage instead...


> 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
>            Reporter: Yannick Haser
>         Attachments: rgbImageExample0.pdf, 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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