Problems with RLE-8 encoded Bitmaps
lazarus / 39-Graphics

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Antrepolit · 2006-09-29 05:11

Good morning,

it's me again.

Yesterday I got a problem until loading "some" bitmaps.
Lazarus showed me the message "RLE-8 encoded bitmaps are not
supported".

Does anyone know if the RLE-8 compression be supported in future?

It would make me very happy   , because I now have to convert
200 RLE-8 bitmaps  :cry:

Antrepolit

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theo · 2006-09-29 08:15

I don't know if Lazarus can't but FPImage should be able to read them.
See fpreadbmp.pp.

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Marc · 2006-09-29 09:33

AFAIK laz is using fpimage

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Antrepolit · 2006-09-29 12:19

Lazarus can't decode it.

Do you think, I should convert all bitmaps? The problem on it is, that
these bitmaps are in a Win32 - resource file. It means I have to
export them, convert them and at least to to create a new Win32 -
resource file.

Oh...

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Vincent Snijders · 2006-09-29 13:14

Marc, I think the problem is in TLazReaderBMP.InternalReadBody in the
IntfGraphics unit.

I don't know what it should do to support RLE encoded bitmaps.

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felipemdc · 2006-09-29 13:24

Ummm, maybe you could create a script that call ImageMagick to
automate this task.

www.imagemagick.org/

Or a pascal software that calls ImageMagick libraries.

The resource file shouldn't be hard to recreate if you make a .rc file
for him, and compile that RC file using Windres GNU Tool that comes
with lazarus

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theo · 2006-09-29 17:28

Umm, but I'm pretty sure fpreadbmp can read them.
It's stated:  - Support for RLE4 and RLE8 decoding
So why not read them the FPImage way?
Afaik you can transform these to a Lazarus displayable format.
If not, you could at least save them uncompressed to stream/file and
load from there instead of using ImageMagick.