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Item6507: Some JPEG files don't get height, width when attached

Item Form Data

AppliesTo: Component: Priority: CurrentState: WaitingFor: TargetRelease ReleasedIn
Engine Attach.pm Normal Closed   n/a  

Edit Form Data

Reported By:
Applies To:
Current State:
Waiting For:
Target Release:
Released In:


When creating a link for a new attachment, Attach.pm parses image files to determine the image size for the ≶IMG> tag.

The magic code for JPEG files doesn't handle jpeg DCF - the format used by digital camera media cards. So many, many of today's attached JPEG files don't get the intended height and width in the tag!

Easy fix:

sub _imgsize {
            elsif ($a == 0xFF
                && $b == 0xD8
                && $c == 0xFF
                && $d == 0xE0 )

                #  JPG ff d8 ff e0
            elsif ($a == 0xFF
                && $b == 0xD8
                && $c == 0xFF
                && ($d == 0xE0 || $d == 0xE1) )

                #  JPG ff d8 ff e0/e1=

-- TWiki:Main/TimotheLitt - 27 Jun 2010

Thank you Timothe! Since you have SVN access (TWiki:Codev/TimotheLittWouldLikeToCheckIn) could you checkin the fix yourself? This needs to go into trunk and 5.0 branch.

-- PeterThoeny - 28 Jun 2010

This was fixed in Item6508, and released in TWiki-5.0.1.

-- TWiki:Main.PeterThoeny - 2013-09-28

Summary Some JPEG files don't get height, width when attached
ReportedBy TWiki:Main.TimotheLitt
Codebase ~twiki4, 5.0.0, 4.3.2, 4.3.1, 4.3.0, 4.2.4, 4.2.3, 4.2.2, 4.2.1, 4.2.0, 4.1.2, 4.1.1, 4.1.0, 4.0.5, 4.0.4, 4.0.3, 4.0.2, 4.0.1, 4.0.0
SVN Range TWiki-5.0.0, Sun, 20 Jun 2010, build 19085
AppliesTo Engine
Component Attach.pm
Priority Normal
CurrentState Closed


TargetRelease n/a

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Topic revision: r3 - 2013-09-28 - PeterThoeny
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