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Posted to dev@pdfbox.apache.org by "Yannick Haser (JIRA)" <ji...@apache.org> on 2017/07/04 10:43:00 UTC
[jira] [Updated] (PDFBOX-3854) PDDeviceRGB.toRGBImage does not
return a RGB-Typed-Image
[ https://issues.apache.org/jira/browse/PDFBOX-3854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yannick Haser updated PDFBOX-3854:
----------------------------------
Attachment: rgbImageExample0.pdf
Starter.java
Added Simple-Example-PDF as "ShowCase"
Added Simple ShowCase
Steps:
# Duplicating the File until there are 8 Files present
# Run the Application
My Results:
Without ColorConversion: 811
With ColorConversion: 644
With normal PDFs the gap gets even bigger (Partially I have a Performance-Gap from 50-60%, unfortunally i cannot upload those PDFs)
> 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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