PDPage convertToImage creates inverted black and white image for indexed
colorspace.
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Key: PDFBOX-1022
URL: https://issues.apache.org/jira/browse/PDFBOX-1022
Project: PDFBox
Issue Type: Bug
Components: PDModel
Affects Versions: 1.5.0
Environment: Java 1.6, Windows 7.
Reporter: Roland Quast
The attached PDF file demonstrates that line 178 of PDPixelMap.java does not
try to determine what is the black value and what is the white value. The
colorspace of the attached PDF file is PDIndexed.
Inverting this value makes the file render correctly, but there needs to be
some kind of way to determine what is black/white for a PDIndexed colorspace.
if (colorspace instanceof PDDeviceGray)
{
COSArray decode = getDecode();
// we have to invert the b/w-values,
// if the Decode array exists and consists of (1,0)
if (decode != null && decode.getInt(0) == 1)
{
map = new byte[] {(byte)0xff};
}
else
{
map = new byte[] {(byte)0x00, (byte)0xff};
}
}
else if (colorspace instanceof PDICCBased)
{
if ( ((PDICCBased)colorspace).getNumberOfComponents() == 1)
{
map = new byte[] {(byte)0xff};
}
else
{
map = new byte[] {(byte)0x00, (byte)0xff};
}
}
else
{
map = new byte[] {(byte)0x00, (byte)0xff}; // <--- HAPPENS
HERE - NO TEST FOR BLACK/WHITE LIKE OTHER CASES ABOVE.
}
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