blf.dimensions incorrect on Darwin builds #46371

New Issue

jon denning · 2015-10-04T23:51:02+02:00

jon denning commented

2015-10-04 23:51:02 +02:00

We have created a help text box in python that draws text to 3D viewport when our tools run modal. This help box automatically wraps the text if it is too wide to fit in the space given. Our line breaking code uses blf.dimensions(0,text)- [x] to determine the width of the text.

On Linux and Windows machines, this works as expected, but on OSX machine it is off by factor of ~1.2. For example, blf.dimensions(0,text)- [x] gives 155.4 on OSX and 186.0 on Linux when text = 'Contours Help (click to hide help):'. Note: it should report 186.0 for both machines.

We have seen this issue since at least Jan 12, but thought it was a bug in our code. We are using the default font at size = 12 with DPI = context.user_preferences.system.dpi, which is 72 on all our test machines (Linux, Windows, OSX).

We have created a help text box in python that draws text to 3D viewport when our tools run modal. This help box automatically wraps the text if it is too wide to fit in the space given. Our line breaking code uses `blf.dimensions(0,text)- [x]` to determine the width of the text. On Linux and Windows machines, this works as expected, but on OSX machine it is off by factor of ~1.2. For example, `blf.dimensions(0,text)- [x]` gives 155.4 on OSX and 186.0 on Linux when `text = 'Contours Help (click to hide help):'`. *Note*: it **should** report 186.0 for both machines. We have seen this issue since at least Jan 12, but thought it was a bug in our code. We are using the default font at size = 12 with `DPI = context.user_preferences.system.dpi`, which is 72 on all our test machines (Linux, Windows, OSX).

jon denning commented

2015-10-04 23:51:02 +02:00

Changed status to: 'Open'

jon denning commented

2015-10-04 23:51:02 +02:00

Added subscriber: @gfxcoder

patrick moore commented

2015-10-04 23:52:56 +02:00

Added subscriber: @patmo141-3

Jonathan Williamson commented

2015-10-04 23:53:19 +02:00

Removed subscriber: @patmo141-3

Jonathan Williamson commented

2015-10-04 23:59:28 +02:00

Added subscriber: @JonathanWilliamson

Aaron Carlisle commented

2015-10-05 00:02:09 +02:00

Added subscribers: @ideasman42, @Blendify

Aaron Carlisle commented

2015-10-05 00:02:09 +02:00

@ideasman42 think this one is for you

Brecht Van Lommel commented

2015-10-05 01:14:00 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2015-10-05 01:14:00 +02:00

What are the steps to reproduce this problem, just running this in the python console?

import blf; blf.size(0, 12, 72); blf.dimensions(0, 'Contours Help (click to hide help):')[0]

Does the OS X machine have a retina display? I would expect a 2x factor for that though, not 1.2x.

Are you testing with factory settings on both platforms?

What are the steps to reproduce this problem, just running this in the python console? ``` import blf; blf.size(0, 12, 72); blf.dimensions(0, 'Contours Help (click to hide help):')[0] ``` Does the OS X machine have a retina display? I would expect a 2x factor for that though, not 1.2x. Are you testing with factory settings on both platforms?

jon denning commented

2015-10-05 02:43:22 +02:00

Running import blf; blf.size(0, 12, 72); blf.dimensions(0, 'Contours Help (click to hide help):')- [x] gives:

Linux: 186.046875
OSX: ~155.4
Windows: ~186.047

The OSX machine does not have a retina display. Factory settings for Linux and Windows. Fairly certain OSX has factory settings (not my machine), but I'll double-check on this.

Running `import blf; blf.size(0, 12, 72); blf.dimensions(0, 'Contours Help (click to hide help):')- [x]` gives: Linux: `186.046875` OSX: ~`155.4` Windows: ~`186.047` The OSX machine does not have a retina display. Factory settings for Linux and Windows. Fairly certain OSX has factory settings (not my machine), but I'll double-check on this.

Brecht Van Lommel commented

2015-10-05 22:32:40 +02:00

Testing with Blender 2.75 and 2.76 RC3 on OS X 10.11, I'm seeing 186.046875, both when running Blender in retina and low resolution.

I would expect there's something in the user preferences influencing this. So testing with File > Load Factory Settings would be good to confirm if that's the case. Perhaps something under Themes > Text Style, or a custom interface font under System.

Testing with Blender 2.75 and 2.76 RC3 on OS X 10.11, I'm seeing `186.046875`, both when running Blender in retina and low resolution. I would expect there's something in the user preferences influencing this. So testing with File > Load Factory Settings would be good to confirm if that's the case. Perhaps something under Themes > Text Style, or a custom interface font under System.

Jonathan Williamson commented

2015-10-06 14:23:16 +02:00

It would seem it is indeed something with my user preferences.

Running with factory settings I get 186.046875 as well.

It would seem it is indeed something with my user preferences. Running with factory settings I get `186.046875` as well.

Brecht Van Lommel commented

2015-10-10 15:01:06 +02:00

So, we need to figure out what exactly is causing this. An addon, theme setting, something else? If you can't find it, could you attach your userpref.blend?