blf.dimensions reports different text sizes with Region Overlap enabled, 3D View shown, and panels set #50372

New Issue

jon denning · 2017-01-04T20:51:29+01:00

jon denning commented

2017-01-04 20:51:29 +01:00

We have found that blf.dimensions returns different text sizes (by ~10%) if Region Overlap is enabled and the 3D View is particularly configured.

To replicate:

Enable Region Overlap in User Prefs > System
Set main window to have 3D View and Python Console (other areas seem not to matter)
3D View: Tool Shelf closed, Properties Panel closed
In Python Console:
- >>> import blf
- >>> blf.dimensions(0, "test")
- (19.3125, 7.875)
3D View: open Tool Shelf
In Python Console
- >>> blf.dimensions(0, "test")
- (21.703125, 8.59375)

Anything but Region Overlap enabled + Tool Shelf opened + Properties Panel closed, and blf.dimensions(0, "test") reports (19.3125, 7.875). Strangely, in Retopoflow, we found that the issue shows up when Region Overlap is enabled and Properties Panel is opened (Tool Shelf does not matter). (see https://github.com/CGCookie/retopoflow/issues/88 for results) Also, the issue does not appear if 3D View is not shown (switch to Text Editor, for ex).

Tested in fresh install of Blender 2.78a on OSX and Linux, but it seems that we've had this issue since Jan 2015.

We have found that `blf.dimensions` returns different text sizes (by ~10%) if Region Overlap is enabled and the 3D View is particularly configured. To replicate: - Enable Region Overlap in User Prefs > System - Set main window to have 3D View and Python Console (other areas seem not to matter) - 3D View: Tool Shelf closed, Properties Panel closed - In Python Console: - `>>> import blf` - `>>> blf.dimensions(0, "test")` - `(19.3125, 7.875)` - 3D View: open Tool Shelf - In Python Console - `>>> blf.dimensions(0, "test")` - `(21.703125, 8.59375)` Anything but Region Overlap enabled + Tool Shelf opened + Properties Panel closed, and `blf.dimensions(0, "test")` reports `(19.3125, 7.875)`. Strangely, in Retopoflow, we found that the issue shows up when Region Overlap is enabled and Properties Panel is *opened* (Tool Shelf does *not* matter). (see https://github.com/CGCookie/retopoflow/issues/88 for results) Also, the issue does not appear if 3D View is not shown (switch to Text Editor, for ex). Tested in fresh install of Blender 2.78a on OSX and Linux, but it seems that we've had this issue since Jan 2015.

jon denning commented

2017-01-04 20:51:29 +01:00

Changed status to: 'Open'

jon denning commented

2017-01-04 20:51:29 +01:00

Added subscriber: @gfxcoder

Jonathan Williamson commented

2017-01-04 20:55:00 +01:00

Added subscriber: @JonathanWilliamson

Bastien Montagne commented

2017-01-06 11:45:40 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2017-01-06 11:45:40 +01:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2017-01-06 11:45:40 +01:00

Bastien Montagne self-assigned this 2017-01-06 11:45:40 +01:00

Bastien Montagne commented

2017-01-06 11:45:40 +01:00

There is no bug here actually, this is just a matter of font size.

When Properties of 3DView is shown, last size used during text drawing for default font is 11, while it’s 12 when props are hidden.

Note that you cannot do much about this in python console, since redraw happens between each line of code, but in a 'real' script you shall call blf.size(0, 11, 72) (size 11, dpi 72) or whatever size/dpi value you need prior to computing size of the text.

Anyway, no bug here really.

There is no bug here actually, this is just a matter of font size. When Properties of 3DView is shown, last size used during text drawing for default font is `11`, while it’s `12` when props are hidden. Note that you cannot do much about this in python console, since redraw happens between each line of code, but in a 'real' script you shall call `blf.size(0, 11, 72)` (size 11, dpi 72) or whatever size/dpi value you need prior to computing size of the text. Anyway, no bug here really.

jon denning commented

2017-01-06 17:34:28 +01:00

Thanks, @mont29! That solved the problem!

Seems we were calling blf.size(), but only after calling blf.dimensions() and before drawing the text, so the text drew correctly.

Thanks, @mont29! That solved the problem! Seems we were calling `blf.size()`, but only after calling `blf.dimensions()` and before drawing the text, so the text drew correctly.

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blf.dimensions reports different text sizes with Region Overlap enabled, 3D View shown, and panels set #50372