austinchen created PDFBOX-3981:
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Summary: It won't catch the exception when read the CMYK image in
PDF for DCTFilter.class
Key: PDFBOX-3981
URL: https://issues.apache.org/jira/browse/PDFBOX-3981
Project: PDFBox
Issue Type: Bug
Affects Versions: 2.0.7
Environment: Windows/Liunx
Reporter: austinchen
Fix For: 2.0.7
In below code of DCTFilter.class, can't catch the IIOException because the
right Exception is IOException.
And when I change the code, in my testing, when I convert the PDF to image, I
found the CMYK image will be lost in converted image, it's very strange when I
set "String numChannels = '2'", I got positive result.
if ("3".equals(numChannels) || numChannels.isEmpty())
{
try
{
// I'd like to use ImageReader#readRaster but it is buggy
and can't read RGB correctly
BufferedImage image = reader.read(0);
raster = image.getRaster();
}
catch (IIOException e)
{
// JAI can't read CMYK JPEGs using ImageReader#read or
ImageIO.read but
// fortunately ImageReader#readRaster isn't buggy when
reading 4-channel files
raster = reader.readRaster(0, null);
}
}
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