ImagesForLazarus licensing
lazarus / 5-Lazarus Extra Components

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anrthierry · 2011-08-11 04:20

I can't understand clearly how is licensed the package
ImagesForLazarus,
in readme it says you can use it freely in commercial products,
and in sources it is LGPL 2;

so ? can it be linked with commercial applications without releasing
source code like the lcl ? or not ?

what do i have to do if i link statically LazJpg or other in my
commercial software ?

thanks
thierry

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anrthierry · 2011-08-11 05:43

On other hand my question is:
does ImagesForLazarus package's license permits static linking to
produce closed exe file with lazarus or not ?

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DirkS · 2011-08-11 08:13

Do you really need this package? Looking at the code it's pretty much
an empty container, linking to existing FPC code; unit Graphics
(except for the tga format).

BTW: the readme in the source directory does not have any info about
licencing; maybe you were looking at the readme for the examples.

Gr.
Dirk.

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Leledumbo · 2011-08-11 08:54

Quotein readme it says you can use it freely in commercial products,
and in sources it is LGPL 2;AFAIK LGPL allows commercial usage without
releasing source code.

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anrthierry · 2011-08-11 11:48

Quote from: DirkS on August 11, 2011, 10:13:10 amDo you really need
this package? Looking at the code it's pretty much an empty container,
linking to existing FPC code; unit Graphics (except for the tga
format).

BTW: the readme in the source directory does not have any info about
licencing; maybe you were looking at the readme for the examples.

Gr.
Dirk.

In fact i need TJpegImage and TPngImage just like in delphi
(reading/writing png and jpeg in resources, streams and files), tga
and gif support would be appreciated too,
and they say ImagesForlazarus is just like delphi's TJpegImage, so i
began using ImagesForLazarus for my project, til i read the license
and didn't know what to do when i saw Imagesforlazarus was LGPL 2.
Is there a way to have delphi's image manipulation object just by
using the LCL ? How ?


Yes i looked at the readme in the examples directory 

thanks

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anrthierry · 2011-08-11 11:50

Quote from: Leledumbo on August 11, 2011, 10:54:24 amQuotein readme it
says you can use it freely in commercial products,
and in sources it is LGPL 2;AFAIK LGPL allows commercial usage without
releasing source code.

Yes (modified LGPL),
but are you sure, absolutely sure that ImagesForLazarus package is
licensed as modified LGPL ?
(it's the sense of my first question)

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anrthierry · 2011-08-11 13:28

ok i found it,
it was TPortableNetworkGraphic and TJpegImage in the Graphics unit of
LCL,

thanks DirkS,

but i think it would be cool for lazarus project expansion, to clarify
what can be used statically in a commercial application and what needs
open source code.

By the way would someone knows how to use Ogg Vorbis files with the
LCL only ?

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DirkS · 2011-08-11 13:51

Quotebut are you sure, absolutely sure that ImagesForLazarus package
is licensed as modified LGPL ?
(it's the sense of my first question)
Cannot check the code ATM, but IIRC the licence in the
ImagesForLazarus code is actually GPL, not LGPL...

As I understand it ImagesForLazarus was used in the past for image
manipulation, but as more and more of it was integrated in FPC it
became just a container with references to the Graphics unit. The only
code in the JPG unit is something like 'TJpgImg = TJpegImage'.

Gr.
Dirk.

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anrthierry · 2011-08-11 22:28

so it should be usable in commercial static linked exe ?

well not clear at all, Lazarus should contain a LGPL components folder
with all the components that cannot be linked statically with
commercial applications, and a LCL components folder,
i think it is a MUST TO DO if we want lazarus to be used widely,

well at least it's my opinion,

thanks for your help,
Thierry