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support feature freeze

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subframe7536 2024-07-27 22:28:49 +08:00
parent 3c6660dd11
commit 6b6f71e2c5
3 changed files with 181 additions and 1 deletions
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61
build.py
View file

@ -28,6 +28,18 @@ build_config = {
"family_name": "Maple Mono",
# whether to use hinted ttf as base font
"use_hinted": True,
"feature_freeze": {
"cv01": "ignore",
"cv02": "ignore",
"cv03": "ignore",
"cv04": "ignore",
"cv98": "ignore",
"cv99": "ignore",
"ss01": "ignore",
"ss02": "ignore",
"ss03": "ignore",
"ss04": "ignore",
},
# nerd font settings
"nerd_font": {
# whether to enable Nerd Font
@ -283,6 +295,53 @@ def add_cv98(font):
lang_sys_rec.LangSys.FeatureIndex.append(feature_index)
def freeze_feature(font: TTFont):
# check feature list
feature_record = font["GSUB"].table.FeatureList.FeatureRecord
feature_dict = {
feature.FeatureTag: feature.Feature
for feature in feature_record
if feature.FeatureTag != "calt"
}
calt_features = [
feature.Feature for feature in feature_record if feature.FeatureTag == "calt"
]
# Process features
for feature_tag, status in build_config["feature_freeze"].items():
feature = feature_dict.get(feature_tag)
if not feature or status == "ignore":
continue
if status == "disable":
feature.LookupListIndex = []
continue
if feature_tag in ["ss03"]:
# Enable by moving rules into "calt"
for calt_feat in calt_features:
calt_feat.LookupListIndex.extend(feature.LookupListIndex)
else:
# Enable by replacing data in glyf and hmtx tables
glyph_dict = font["glyf"].glyphs
hmtx_dict = font["hmtx"].metrics
for index in feature.LookupListIndex:
lookup = font["GSUB"].table.LookupList.Lookup[index]
for old_key, new_key in lookup.SubTable[0].mapping.items():
if (
old_key in glyph_dict
and old_key in hmtx_dict
and new_key in glyph_dict
and new_key in hmtx_dict
):
glyph_dict[old_key] = glyph_dict[new_key]
hmtx_dict[old_key] = hmtx_dict[new_key]
else:
print(f"{old_key} or {new_key} does not exist")
return
def build_mono(f: str):
_path = path.join(output_ttf, f)
font = TTFont(_path)
@ -314,6 +373,8 @@ def build_mono(f: str):
elif style_name1 == " ExtraLight":
font["OS/2"].usWeightClass = 275
freeze_feature(font)
font.save(_path)
font.close()
run(f"ftcli converter ttf2otf {_path} -out {output_otf}")

12
config.json
View file

@ -2,6 +2,18 @@
"$schema": "./source/schema.json",
"family_name": "Maple Mono",
"use_hinted": true,
"feature_freeze": {
"cv01": "ignore",
"cv02": "ignore",
"cv03": "ignore",
"cv04": "ignore",
"cv98": "ignore",
"cv99": "ignore",
"ss01": "ignore",
"ss02": "ignore",
"ss03": "ignore",
"ss04": "ignore"
},
"nerd_font": {
"enable": true,
"version": "3.2.1",

109
source/schema.json
View file

@ -18,6 +18,111 @@
"description": "Whether to use hinted TTF as base font",
"default": true
},
"feature_freeze": {
"type": "object",
"description": "Freeze some font features \n enable: enable font features by default \n disable: remove some font features \n ignore: skip handle target font features",
"properties": {
"cv01": {
"type": "string",
"description": "Classic '@', '$', '&', 'Q', '=>', '->'",
"enum": [
"ignore",
"disable",
"enable"
]
},
"cv02": {
"type": "string",
"description": "Alternative 'a' (with top alarm)",
"enum": [
"ignore",
"disable",
"enable"
]
},
"cv03": {
"type": "string",
"description": "Alternative 'i' (without bottom left bar)",
"enum": [
"ignore",
"disable",
"enable"
]
},
"cv04": {
"type": "string",
"description": "Alternative 'l' (with bottom left bar) and '1' (without bottom bar)",
"enum": [
"ignore",
"disable",
"enable"
]
},
"cv98": {
"type": "string",
"description": "full width '…'(ellipsis) and '—'(emdash) support for Maple Mono NF CN",
"enum": [
"ignore",
"disable",
"enable"
]
},
"cv99": {
"type": "string",
"description": "Traditional punctuations support for Maple Mono NF CN",
"enum": [
"ignore",
"disable",
"enable"
]
},
"ss01": {
"type": "string",
"description": "Non-cursive italic style",
"enum": [
"ignore",
"disable",
"enable"
]
},
"ss02": {
"type": "string",
"description": "Disable ligautures on equals like '==', '!=', '<='",
"enum": [
"ignore",
"disable",
"enable"
]
},
"ss03": {
"type": "string",
"description": "Ignore cases on all tags",
"enum": [
"ignore",
"disable",
"enable"
]
},
"ss04": {
"type": "string",
"description": "Disable ligatures on '__', '#__', '***'",
"enum": [
"ignore",
"disable",
"enable"
]
},
"zero": {
"type": "string",
"description": "Dot style '0'",
"enum": [
"ignore",
"disable",
"enable"
]
}
}
},
"nerd_font": {
"type": "object",
"description": "Config for Nerd Font",
@ -47,7 +152,9 @@
"items": {
"type": "string"
},
"default": ["--complete"],
"default": [
"--complete"
],
"description": "Symbol Fonts settings. if is not [\"--complete\"], will use font-patcher to generate fonts. Full args: https://github.com/ryanoasis/nerd-fonts?tab=readme-ov-file#font-patcher"
},
"extra_args": {