[jira] [Created] (PDFBOX-3854) PDDeviceRGB.toRGBImage does not return a RGB-Typed-Image

["Yannick Haser (JIRA)" <ji...@apache.org>]

Yannick Haser created PDFBOX-3854:
-------------------------------------

             Summary: 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


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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