98 lines
2.7 KiB
Go
98 lines
2.7 KiB
Go
// Copyright ©2021 The Gonum Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Package liberation exports the Liberation fonts as a font.Collection.
|
|
package liberation // import "gonum.org/v1/plot/font/liberation"
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
|
|
"github.com/go-fonts/liberation/liberationmonobold"
|
|
"github.com/go-fonts/liberation/liberationmonobolditalic"
|
|
"github.com/go-fonts/liberation/liberationmonoitalic"
|
|
"github.com/go-fonts/liberation/liberationmonoregular"
|
|
"github.com/go-fonts/liberation/liberationsansbold"
|
|
"github.com/go-fonts/liberation/liberationsansbolditalic"
|
|
"github.com/go-fonts/liberation/liberationsansitalic"
|
|
"github.com/go-fonts/liberation/liberationsansregular"
|
|
"github.com/go-fonts/liberation/liberationserifbold"
|
|
"github.com/go-fonts/liberation/liberationserifbolditalic"
|
|
"github.com/go-fonts/liberation/liberationserifitalic"
|
|
"github.com/go-fonts/liberation/liberationserifregular"
|
|
stdfnt "golang.org/x/image/font"
|
|
"golang.org/x/image/font/opentype"
|
|
|
|
"gonum.org/v1/plot/font"
|
|
)
|
|
|
|
var (
|
|
once sync.Once
|
|
collection font.Collection
|
|
)
|
|
|
|
func Collection() font.Collection {
|
|
once.Do(func() {
|
|
addColl(font.Font{}, liberationserifregular.TTF)
|
|
addColl(font.Font{Style: stdfnt.StyleItalic}, liberationserifitalic.TTF)
|
|
addColl(font.Font{Weight: stdfnt.WeightBold}, liberationserifbold.TTF)
|
|
addColl(font.Font{
|
|
Style: stdfnt.StyleItalic,
|
|
Weight: stdfnt.WeightBold,
|
|
}, liberationserifbolditalic.TTF)
|
|
|
|
// mono variant
|
|
addColl(font.Font{Variant: "Mono"}, liberationmonoregular.TTF)
|
|
addColl(font.Font{
|
|
Variant: "Mono",
|
|
Style: stdfnt.StyleItalic,
|
|
}, liberationmonoitalic.TTF)
|
|
addColl(font.Font{
|
|
Variant: "Mono",
|
|
Weight: stdfnt.WeightBold,
|
|
}, liberationmonobold.TTF)
|
|
addColl(font.Font{
|
|
Variant: "Mono",
|
|
Style: stdfnt.StyleItalic,
|
|
Weight: stdfnt.WeightBold,
|
|
}, liberationmonobolditalic.TTF)
|
|
|
|
// sans-serif variant
|
|
addColl(font.Font{Variant: "Sans"}, liberationsansregular.TTF)
|
|
addColl(font.Font{
|
|
Variant: "Sans",
|
|
Style: stdfnt.StyleItalic,
|
|
}, liberationsansitalic.TTF)
|
|
addColl(font.Font{
|
|
Variant: "Sans",
|
|
Weight: stdfnt.WeightBold,
|
|
}, liberationsansbold.TTF)
|
|
addColl(font.Font{
|
|
Variant: "Sans",
|
|
Style: stdfnt.StyleItalic,
|
|
Weight: stdfnt.WeightBold,
|
|
}, liberationsansbolditalic.TTF)
|
|
|
|
n := len(collection)
|
|
collection = collection[:n:n]
|
|
})
|
|
|
|
return collection
|
|
}
|
|
|
|
func addColl(fnt font.Font, ttf []byte) {
|
|
face, err := opentype.Parse(ttf)
|
|
if err != nil {
|
|
panic(fmt.Errorf("vg: could not parse font: %+v", err))
|
|
}
|
|
fnt.Typeface = "Liberation"
|
|
if fnt.Variant == "" {
|
|
fnt.Variant = "Serif"
|
|
}
|
|
collection = append(collection, font.Face{
|
|
Font: fnt,
|
|
Face: face,
|
|
})
|
|
}
|