Kerning table not read from TTF font #47725

Closed
opened 2016-03-08 16:26:56 +01:00 by Gottfried Hofmann · 11 comments

System Information
Ubuntu 15.10 Geforce GTX 970M

Blender Version
Broken: 2.76b official linux x64

Short description of error
This is an example where the kerning is not read from the TTF kerning table. It works fine in Inkscape 0.91 linux

blender_kerning.png

Exact steps for others to reproduce the error
Download the following ttf, add a text object in Blender, type "av", apply this font:

telegrafico.ttf

**System Information** Ubuntu 15.10 Geforce GTX 970M **Blender Version** Broken: 2.76b official linux x64 **Short description of error** This is an example where the kerning is not read from the TTF kerning table. It works fine in Inkscape 0.91 linux ![blender_kerning.png](https://archive.blender.org/developer/F289053/blender_kerning.png) **Exact steps for others to reproduce the error** Download the following ttf, add a text object in Blender, type "av", apply this font: [telegrafico.ttf](https://archive.blender.org/developer/F289052/telegrafico.ttf)

Changed status to: 'Open'

Changed status to: 'Open'

Added subscriber: @GottfriedHofmann

Added subscriber: @GottfriedHofmann

Added subscriber: @mont29

Added subscriber: @mont29

Changed status from 'Open' to: 'Archived'

Changed status from 'Open' to: 'Archived'
Bastien Montagne self-assigned this 2016-03-12 11:59:14 +01:00

Thanks for the report, but this is more a TODO than a bug, this feature has never been implemented for our 3DText object afaik. Added a note to our TODO list.

Thanks for the report, but this is more a TODO than a bug, this feature has never been implemented for our 3DText object afaik. Added a note to our [TODO list](http://wiki.blender.org/index.php/Dev:Source/Development/Todo/Tools#Text_Editing_.283D.29).
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Added subscriber: @SebastianWitt

Added subscriber: @SebastianWitt
Member

I had a look at adding kerning support and here is my approach:
https://developer.blender.org/P407

I don't think it is a very elegant approach. It adds a new Hashtable to the "VFontData" struct which is quite big up to (36481) for systemfonts and the blender default font which doesn't even support kerning.
The Hashtable saves all possible character pairs. If there is a better datastruct to store the necessary data let me know. (ghash is also quite confusing)
I will experiment with other approaches, only saving the kerning values > 0.

For now I'm happy about every bit of feedback!

I had a look at adding kerning support and here is my approach: https://developer.blender.org/P407 I don't think it is a very elegant approach. It adds a new Hashtable to the "VFontData" struct which is quite big up to (36481) for systemfonts and the blender default font which doesn't even support kerning. The Hashtable saves all possible character pairs. If there is a better datastruct to store the necessary data let me know. (ghash is also quite confusing) I will experiment with other approaches, only saving the kerning values > 0. For now I'm happy about every bit of feedback!

Thanks for the work and patch, but would indeed really not go that way… Thing is, we already have kerning support for all our UI code, using iirc freetype lib helpers for that. So suggest you check code in blenfont dir and see how to hook it into 3D fonts code? Really don’t think we need to bake all possible kernings into own ghash.

Also, probably better to create a new diff to get review on your patch once ready, comments in closed bug report is not so handy to manage. ;)

Thanks for the work and patch, but would indeed really not go that way… Thing is, we already have kerning support for all our UI code, using iirc freetype lib helpers for that. So suggest you check code in `blenfont` dir and see how to hook it into 3D fonts code? Really don’t think we need to bake all possible kernings into own ghash. Also, probably better to create a new diff to get review on your patch once ready, comments in closed bug report is not so handy to manage. ;)
Member

Here is my new Approach, now in a diff. :)

Here is my new Approach, now in a diff. :) - > https://developer.blender.org/D2282

Added subscriber: @IanHuang

Added subscriber: @IanHuang

Added subscriber: @frameshift

Added subscriber: @frameshift
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Reference: blender/blender#47725
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