[11.00] Can't view certain BMP files

[Horst.Epp]

Except the PhotoViewer plugin
all other x64 configurations and image plugins display this bmp's correctly.
TC x86 without any additional settings like IrfanView doesn't work.
I guess not a real problem for most of us.

[AntonyD]

2JOUBE

Not really, because, for example, a plugin that I'm very familiar with handles it quite correctly. So, searching for a reason...

I'm sorry, but your answer does not fall at all into the topic of my explanation of the situation and your incorrect statement that the BitMap file signature is the first four bytes - BMHX. No - only the first two: BM. That's why I used the phrase "you'll be surprised"... Because this new info is slightly at odds with your current knowledge;) Well, for control, I prepared links for you, where you can see - WHAT takes the first two bytes of a file of this format.
And yes - you don't need to look for anything else - the author quite accurately noted that now he will just have to work with a structure of a different size.

[AntonyD]

2Horst.Epp

I guess not a real problem for most of us.

I Agree. And it's especially true - when nearest new TC release will correctly handle such files )))

[JOUBE]

By the way: I just tested this issue by chance:

My standard image editing program is Paint Shop Pro version 4.12 from 28 Jan 1997. *)

When I try to open the "PIC_6.bmp" file with it, I get the following error message and the picture is not displayed: "This is not a valid BMP/DIB/RLE file."

Something has obviously changed in the specification of BMP files since then. (Perhaps as a note to ghisler(author)) Or other programs simply ignore the error in it. **)

Joube

*) Really my standard image editing program in many cases (I am not a graphic designer...)
**) As I said above: But a Plugin, I am familiar with, can handle e.g. "PIC_6.bmp" well.

[Sir_SiLvA]

My standard image editing program is Paint Shop Pro version 4.12 from 28 Jan 1997. *)

Why use the 4.12 if I may ask? (I myself have been using the 5.03 the last 24 years)

[Gral]

I'm a big fan of Paint Shop Pro and have tried versions 1.0 to 11.20 and some higher, while I've been sticking with 7.04 for long time which is really good especially for some vector edits that were missing in earlier versions.
I sometimes use 9.01 and 10.10 which support AVIF and WEBP (with plugins)

On Paint Shop Pro versions 1.0 - 10.10 and even Paint Shop 2 and 3, this error message looks exactly the same.

[ghisler(Author)]

Something has obviously changed in the specification of BMP files since then.

Possible, but it's not mentioned in the description of the bitmapinfoheader structure I already linked in my first reply.

Or other programs simply ignore the error in it.

Maybe there were other developers who didn't read or understand the specifications and created such files with invalid header...

[white]

15.08.23 Fixed: Support bitmaps which contain an invalid header size field (including the size of the color table) (32)

Tested OK using TC 11.01 rc1 32-bit.

[petermad]

Confirmed fixed in TC 11.01rc1

[white]

Moderator message from: white » 2023-08-22, 08:27 UTC

Moved to Fixed bugs.

[JOUBE]

Confirmed fixed in TC 11.01rc1

Fixed? It wasn't a bug. It's an extension, an additional feature... Thanks for extended support for invalid bitmaps.

[petermad]

2JOUBE

Well, the history says: "15.08.23 Fixed: ..." not Added - maybe it should be changed to:
15.08.23 Added: Support bitmaps which contain an invalid header size field (including the size of the color table) (32)

[JOUBE]

2JOUBE

Well, the history says: "15.08.23 Fixed: ..." not Added - maybe it should be changed to:
15.08.23 Added: Support bitmaps which contain an invalid header size field (including the size of the color table) (32)

I think that's over...

[ghisler(Author)]

Actually I changed it from Added to Fixed myself when gathering the changes for the announcement, because I thought that it was more like a correction than an addition...

[white]

Any way, it fixed the issue