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https://issues.apache.org/jira/browse/PDFBOX-1963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13922958#comment-13922958
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Tilman Hausherr edited comment on PDFBOX-1963 at 3/7/14 12:53 PM:
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The refactoring took away the possibility to decide on the type of the
BufferedImage, especially for bitonal images, which is a requirement for TIFF
CCITT G4 compression. ( Edit: ImageIOUtils uses the imagetype to choose the G4
compression or the LZW compression, see the code and PDFBOX-1734. G4
compression isn't allowed for RGB images even if they have just b/w in it,
because java doesn't count the # of actual colors ) I also don't understand
why you took away the PDPage parameter and are using a page index instead, and
then get a PDPage object again from that.
The modified TIFF testing code in TestImageIOUtils.java doesn't do the test
anymore - the old code had one test for RGB and one test for BITONAL. Now it
has two tests - only the file names differ, not the filetypes, so an identical
image is created.
was (Author: tilman):
The refactoring took away the possibility to decide on the type of the
BufferedImage, especially for bitonal images, which is a requirement for TIFF
CCITT G4 compression. [Edit: ImageIOUtils uses the imagetype to choose the G4
compression or the LZW compression, see the code and PDFBOX-1734. G4
compression isn't allowed for RGB images even if they have just b/w in it,
because java doesn't count the # of actual colors] Please find a solution. I
also don't understand why you took away the PDPage parameter and are using a
page index instead, and then get a PDPage object again from that.
The modified TIFF testing code in TestImageIOUtils.java doesn't do the test
anymore - the old code had one test for RGB and one test for BITONAL. Now it
has two tests - only the file names differ, not the filetypes, so an identical
image is created.
> PDFImageWriter doesn't make use of PDFStreamEngine
> --------------------------------------------------
>
> Key: PDFBOX-1963
> URL: https://issues.apache.org/jira/browse/PDFBOX-1963
> Project: PDFBox
> Issue Type: Improvement
> Components: Utilities
> Affects Versions: 2.0.0
> Reporter: John Hewson
> Assignee: John Hewson
> Fix For: 2.0.0
>
>
> PDFImageWriter is a subclass of PDFStreamEngine, however it never uses any of
> its functionality, the writeImage methods could be marked as static and
> behave in the same manner.
> The relationship between PDFImageWriter, RenderUtil, and ImageIOUtil no
> longer matches its historical origins and needs to be refactored.
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