Axel Howind created PDFBOX-5672:
-----------------------------------
Summary: PDFToImage might not correctly detect unsupported image
formats
Key: PDFBOX-5672
URL: https://issues.apache.org/jira/browse/PDFBOX-5672
Project: PDFBox
Issue Type: Bug
Reporter: Axel Howind
Attachments: fix_detection_of_unsupported_image_file_formats.patch
PDFToImage contains this code:
{code:java}
if (getImageFormats().indexOf(imageFormat) == -1)
{
SYSERR.println( "Error: Invalid image format " + imageFormat + " -
supported are: " + getImageFormats());
return 2;
}
{code}
Here, `getImageFormats()` is called to create a concatenated comma-separated
string that contains all supported image formats. The problem is that a simple
string search is carried out on the concatenated string. Imagine (hypothetical
case) that "jpeg2000" is supported, but "jpeg" is not. If you pass in "jpeg",
it will not be detected that the file format is unsupported.
The solution is to check to formats returned by ImageIO directly. At the same
time, the `getImageFormats()`method can be replaced by a simple one-liner.
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