CMAP: MTYP == 0 (direct use) not handled properly

[gcode-importer]

Originally reported on Google Code with ID 235

The attached file appears blurred in openjpeg-2.0 because the final tile part is higher
than expected and so opj_j2k_read_sot exits too early.

I have attached a patch to resolve this.

Reported by slmistry on 2013-09-06 22:04:47

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- _Attachment: [blur.patch](https://storage.googleapis.com/google-code-attachments/openjpeg/issue-235/comment-0/blur.patch)_ - _Attachment: [Bug691816.pdf](https://storage.googleapis.com/google-code-attachments/openjpeg/issue-235/comment-0/Bug691816.pdf)_

[gcode-importer]

Reported by malaterre on 2014-02-25 15:48:16

• Labels added: Milestone-Release2.1

[gcode-importer]

I've -painfully- extracted the JP2 file from the attached PDF file, see issue235.jp2.
If I did it correctly the file is reported to be buggy as per kakadu point of view:

$ kdu_expand -i issue235.jp2 -o issue235.tiff
Error in Kakadu File Format Support:
JPX source contains a codestream with a palette (pclr) box, but no component
mapping (cmap) box.  This illegal situation has been detected after examining
both the codestream header (chdr) box, if any, for that codestream, and the
default JP2 header (jp2h) box, if any.

Reported by malaterre on 2014-02-26 16:57:29

• Labels added: Priority-Low
• Labels removed: Priority-Medium

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- _Attachment: [issue235.jp2](https://storage.googleapis.com/google-code-attachments/openjpeg/issue-235/comment-2/issue235.jp2)_

[gcode-importer]

Ok looks like there is a colormap in another PDF/XObject. Could someone please extract
the actual JP2 file from this PDF ?

Reported by malaterre on 2014-02-26 17:00:53

[gcode-importer]

FYI, I followed instructions from: http://blog.idrsolutions.com/2011/07/extract-raw-jpeg-images-from-a-pdf-file/

Reported by malaterre on 2014-02-26 17:05:58

[gcode-importer]

Original bug report is at: http://bugs.ghostscript.com/show_bug.cgi?id=691816

Reported by malaterre on 2014-03-04 13:16:11

[gcode-importer]

cmap box is actually a toplevel box instead of being a subbox, hence kakadu is failing
to decode it properly.

Reported by malaterre on 2014-03-04 13:21:40

[gcode-importer]

One need to change the size of the ihdr box from 827 to 847 to correct the file, and
have cmap be a subbox instead of toplevel.

Reported by malaterre on 2014-03-04 13:32:02

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- _Attachment: [issue235_cmapsubbox.jp2](https://storage.googleapis.com/google-code-attachments/openjpeg/issue-235/comment-7/issue235_cmapsubbox.jp2)_

[gcode-importer]

With current r2573, here is what I get:

$ make opj_decompress && ./bin/opj_decompress -i /tmp/issue235_cmapsubbox.jp2 -o bla.tif
[ 84%] Built target openjp2
[100%] Built target opj_decompress

[INFO] Start to read j2k main header (925).
[INFO] Main header has been correctly decoded.
[INFO] No decoded area parameters, set the decoded area to the whole image
[INFO] Header of tile 0 / 1 has been read.
[INFO] Tile 1/2 has been decoded.
[INFO] Image data has been updated with tile 1.

[INFO] Header of tile 1 / 1 has been read.
[INFO] Tile 2/2 has been decoded.
[INFO] Image data has been updated with tile 2.

[ERROR] Component 0 is mapped twice.
[ERROR] Component 0 is mapped twice.
[ERROR] Component 1 doesn't have a mapping.
[ERROR] Component 2 doesn't have a mapping.
ERROR -> opj_decompress: failed to decode image!


While kakadu seems happy about this file.

Reported by malaterre on 2014-03-04 13:35:28

[gcode-importer]

Reported by malaterre on 2014-03-05 08:38:12

• Status changed: Started

[gcode-importer]

This issue was updated by revision r2577.

Reported by malaterre on 2014-03-05 09:45:10

[gcode-importer]

Steps:

$ kdu_transcode -i issue235_cmapsubbox.jp2 -o issue235_cmapsubbox.j2k

-> kakadu and openjpeg produce the exact same output (bitwise).

Reported by malaterre on 2014-03-12 16:25:04

[gcode-importer]

Need to check which bit plane (R,G,B) is causing the issue.

Reported by malaterre on 2014-03-12 17:12:55

[gcode-importer]

For reference:

$ kdu_expand -i issue235_cmapsubbox.jp2 -o red.kdu.pgm,grn.kdu.pgm,blu.kdu.pgm
$ kdu_transcode -i issue235_cmapsubbox.jp2 -o issue235_cmapsubbox.j2k
$ kdu_expand -i issue235_cmapsubbox.j2k -o issue235_cmapsubbox.j2k.pgm
$ crc32 issue235_cmapsubbox.j2k.pgm
66b73a0b
$ crc32 red.kdu.pgm grn.kdu.pgm blu.kdu.pgm
e1d8ac31    red.kdu.pgm
66b73a0b    grn.kdu.pgm
66b73a0b    blu.kdu.pgm

Reported by malaterre on 2014-03-13 09:51:24

[gcode-importer]

This issue was updated by revision r2705.

Reported by malaterre on 2014-03-13 09:57:25

[gcode-importer]

This issue was updated by revision r2707.

Reported by malaterre on 2014-03-13 10:35:48