[Bf-committers] TIFF support - submitted patch #2995

[Ton Roosendaal]

Hi,

Can you provide information how much the tiff library would add to our  
distribution binary size? Or, would it be possible to dynamically link  
with it, like for yafray or quicktime now, based on dlopen linking (so  
no dependency)...?

I've always been extremely cautious with adding libraries to Blender.  
Increasing our binary sizes with 20-30% just for just a single feature  
easily goes out of control. Especially if you look at all the current  
projects for example;

- OpenEXR
- Fluid dynamics
- Nurbana
- Ffmpg
- Verse
- Bullet
- ....?

We also can't afford to make each of such libraries optional, there's a  
real benefit in keeping a single functional & officially supported  
release.

An alternative, like making all these libraries dynamic (including  
current libs like Python, FTGL, etc), and providing a "library  
installer" we could consider... but this is an invitation for a very  
nasty can of worms of installation, maintenance, testing & support  
issues.

Oh, and last note; can we then also read/write 16 bits per channel  
tiff? It's used a lot for defining high definition displacement maps  
(like ZBrush).

-Ton-

On 4 Sep, 2005, at 14:57, Jonathan Merritt wrote:

> Hi Everyone,
>
> I know we already have TIFF file support via QuickTime.  However, on  
> some platforms this can be problematic (for myself under Linux, for  
> example).
>
> I have uploaded a patch (#2995) to the tracker that adds TIFF support  
> using libtiff:
>    http://www.libtiff.org/
>
> The patch supports reading a wide range of TIFF files via the  
> "RGBAImage" high level support in the libtiff library.  Writing of  
> RGB, RGBA and greyscale images is supported directly, using 8 bits per  
> channel in each case.  Images are compressed using the "deflate"  
> compression algorithm.
>
> Currently, if applied, the patch will require libtiff as a dependency.  
>  However, I can change it to optionally compile if that is a better  
> option.
>
> Jonathan Merritt.
>
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>
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Ton Roosendaal  Blender Foundation ton at blender.org  
http://www.blender.org