https://github.com/ctrlcctrlv/opentype_pfed
Python parser implementation of the (non-standard) OpenType `PfEd` table used in FontForge and PfaEdit
https://github.com/ctrlcctrlv/opentype_pfed
Last synced: 9 days ago
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Python parser implementation of the (non-standard) OpenType `PfEd` table used in FontForge and PfaEdit
- Host: GitHub
- URL: https://github.com/ctrlcctrlv/opentype_pfed
- Owner: ctrlcctrlv
- License: apache-2.0
- Created: 2021-01-01T10:52:31.000Z (over 5 years ago)
- Default Branch: main
- Last Pushed: 2021-01-01T17:55:07.000Z (over 5 years ago)
- Last Synced: 2025-02-18T06:13:46.336Z (over 1 year ago)
- Language: Python
- Size: 345 KB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# OpenType `PfEd` table: Python implementation
This is a Python implementation of the OpenType `PfEd` (PfaEdit) table.
`PfEd` is a quite obscure table, but quite useful. It has some elements, like guidelines and comments , that are worth more widely standardizing in OpenType I think.
For now this is just a reader that is 90% done as of 1 January 2021.
(Not promising to finish this!)
## Input
Input should be all the raw bytes found in the `PfEd` table of an OpenType (or SFNT) font.
There are two examples in `examples/`:
* `examples/PfEd` — `InterestingPfEdTable.otf`, the example font I posted at [fonttools/fonttools#464](https://github.com/fonttools/fonttools/issues/464) on 28 April 2018 which contains all `PfEd` tables except `cvtc`;
* `examples/PfEd2` — [TT2020](https://github.com/ctrlcctrlv/TT2020)'s `PfEd` in the state it was in on my hard drive 1 January 2021.
## Usage
```python3
from OpenType_PfEd import PfEd, PfEdBuffer
with open("OpenType_PfEd/examples/PfEd2", "rb") as f:
buf = PfEdBuffer(f.read())
pfed = PfEd(buf)
pfed.parse()
import pprint
pprint.pprint(pfed.subtables)
```
Gives us:
```text
INFO: Got PfEd table version 10000 of length 4 subtables (length 0x000a60e0 bytes)
INFO: Subtable tagged GSUB starts @ 0x00000028
INFO: Subtable tagged GPOS starts @ 0x000005c0
INFO: Subtable tagged guid starts @ 0x00000608
INFO: Subtable tagged layr starts @ 0x000007a8
{'GPOS': [('mark1', [('mark1-1', ['theclass'])]),
('fracq', [('fracq subtable', [])])],
'GSUB': [('fracf', [('fracf subtable', [])]),
('fracs',
[('fracs contextual 0', []),
('fracs contextual 1', []),
('fracs contextual 2', [])]),
('Single Substitution lookup 2',
[('Single Substitution lookup 2 subtable', [])]),
('Single Substitution lookup 3',
[('Single Substitution lookup 3 subtable', [])]),
('Single Substitution lookup 4',
[('Single Substitution lookup 4 subtable', [])]),
('fracn', [('fracn subtable', [])]),
('Single Substitution lookup 6',
[('Single Substitution lookup 6 subtable', [])]),
('fracn3', [('fracn3 subtable', [])]),
('Single Substitution lookup 8',
[('Single Substitution lookup 8 subtable', [])]),
('fracn4', [('fracn4 subtable', [])]),
('Single Substitution lookup 10',
[('Single Substitution lookup 10 subtable', [])]),
('fracn5', [('fracn5 subtable', [])]),
('Single Substitution lookup 12',
[('Single Substitution lookup 12 subtable', [])]),
('fracn6', [('fracn6 subtable', [])]),
('Single Substitution lookup 14',
[('Single Substitution lookup 14 subtable', [])]),
('fracn7', [('fracn7 subtable', [])]),
('Single Substitution lookup 16',
[('Single Substitution lookup 16 subtable', [])]),
('fracn8', [('fracn8 subtable', [])]),
('Single Substitution lookup 18',
[('Single Substitution lookup 18 subtable', [])]),
('fracn9', [('fracn9 subtable', [])]),
('Single Substitution lookup 20',
[('Single Substitution lookup 20 subtable', [])]),
('fracn10', [('fracn10 subtable', [])]),
('Single Substitution lookup 22',
[('Single Substitution lookup 22 subtable', [])]),
('ligahebrew', [('ligahebrew subtable', [])]),
('ligalatin', [('ligalatin subtable', [])])],
'guid': {'desc': '',
'guidelines': [{'name': 'Bottom (Cyrl)',
'pos': -130,
'type': 'Horizontal'},
{'name': 'Bottom (Hebr)',
'pos': -97,
'type': 'Horizontal'},
{'name': 'Bottom (yud, Hebr)',
'pos': 225,
'type': 'Horizontal'},
{'name': 'Mid-bar (Armn)',
'pos': 259,
'type': 'Horizontal'},
{'name': 'Mid-bar (Cyrl)',
'pos': 292,
'type': 'Horizontal'},
{'name': 'x-height', 'pos': 404, 'type': 'Horizontal'},
{'name': 'Top (Hebr)',
'pos': 460,
'type': 'Horizontal'},
{'name': 'Top (Cyrl)',
'pos': 529,
'type': 'Horizontal'}],
'version': 1},
'layr': [{'name': 'Spiro',
'ranges': [{'last': 0, 'offsets': [1065], 'start': 0},
{'last': 5, 'offsets': [2648], 'start': 5},
{'last': 15,
'offsets': [5112, 0, 7632, 0, 8084],
'start': 11},
{'last': 23, 'offsets': [8320], 'start': 23},
{'last': 27, 'offsets': [9596, 11016], 'start': 26},
{'last': 33, 'offsets': [11482], 'start': 33},
{'last': 43,
'offsets': [15341, 16338, 18448, 20180, 21789, 0, 23027],
'start': 37},
{'last': 51,
'offsets': [24105, 25387, 27919],
'start': 49},
{'last': 54, 'offsets': [29394], 'start': 54},
{'last': 58, 'offsets': [30342], 'start': 58},
{'last': 85,
'offsets': [31264,
31680,
33334,
34930,
36480,
0,
38193,
39312,
41769,
0,
43469,
44547,
45969,
46417,
48995,
50389,
51782,
53374,
55164,
56229,
58112],
'start': 65},
{'last': 90, 'offsets': [59433], 'start': 90},
{'last': 98,
'offsets': [60908, 0, 61612, 63176],
'start': 95},
{'last': 101, 'offsets': [64128], 'start': 101},
{'last': 104, 'offsets': [66880], 'start': 104},
{'last': 112,
'offsets': [69223, 0, 71428, 72663, 0, 74195],
'start': 107},
{'last': 161, 'offsets': [74944], 'start': 161},
{'last': 171, 'offsets': [77332], 'start': 171},
{'last': 327, 'offsets': [78802, 0, 79272], 'start': 325},
{'last': 333, 'offsets': [80116], 'start': 333},
{'last': 372, 'offsets': [80748], 'start': 372},
{'last': 383, 'offsets': [82352, 0, 84438], 'start': 381},
{'last': 396,
'offsets': [86524, 88268, 0, 89661],
'start': 393},
{'last': 410, 'offsets': [91657], 'start': 410},
{'last': 420, 'offsets': [93154, 0, 95506], 'start': 418},
{'last': 428, 'offsets': [97524], 'start': 428},
{'last': 435, 'offsets': [99233], 'start': 435},
{'last': 448, 'offsets': [100996], 'start': 448},
{'last': 465, 'offsets': [104322], 'start': 465},
{'last': 476, 'offsets': [105406, 107848], 'start': 475},
{'last': 480, 'offsets': [109282], 'start': 480},
{'last': 501, 'offsets': [113931, 115077], 'start': 500},
{'last': 540, 'offsets': [116535], 'start': 540},
...[snip]...
```