/
gofont.go
86 lines (79 loc) · 2.33 KB
/
gofont.go
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// SPDX-License-Identifier: Unlicense OR MIT
// Package gofont exports the Go fonts as a text.Collection.
//
// See https://blog.golang.org/go-fonts for a description of the
// fonts, and the golang.org/x/image/font/gofont packages for the
// font data.
package gofont
import (
"fmt"
"sync"
"golang.org/x/image/font/gofont/gobold"
"golang.org/x/image/font/gofont/gobolditalic"
"golang.org/x/image/font/gofont/goitalic"
"golang.org/x/image/font/gofont/gomedium"
"golang.org/x/image/font/gofont/gomediumitalic"
"golang.org/x/image/font/gofont/gomono"
"golang.org/x/image/font/gofont/gomonobold"
"golang.org/x/image/font/gofont/gomonobolditalic"
"golang.org/x/image/font/gofont/gomonoitalic"
"golang.org/x/image/font/gofont/goregular"
"golang.org/x/image/font/gofont/gosmallcaps"
"golang.org/x/image/font/gofont/gosmallcapsitalic"
"github.com/cybriq/p9/pkg/gel/gio/font/opentype"
"github.com/cybriq/p9/pkg/gel/gio/text"
)
var (
once sync.Once
collection []text.FontFace
)
func Collection() []text.FontFace {
once.Do(
func() {
register(text.Font{}, goregular.TTF)
register(text.Font{Style: text.Italic}, goitalic.TTF)
register(text.Font{Weight: text.Bold}, gobold.TTF)
register(
text.Font{Style: text.Italic, Weight: text.Bold},
gobolditalic.TTF,
)
register(text.Font{Weight: text.Medium}, gomedium.TTF)
register(
text.Font{Weight: text.Medium, Style: text.Italic},
gomediumitalic.TTF,
)
register(text.Font{Variant: "Mono"}, gomono.TTF)
register(
text.Font{Variant: "Mono", Weight: text.Bold},
gomonobold.TTF,
)
register(
text.Font{
Variant: "Mono", Weight: text.Bold,
Style: text.Italic,
}, gomonobolditalic.TTF,
)
register(
text.Font{Variant: "Mono", Style: text.Italic},
gomonoitalic.TTF,
)
register(text.Font{Variant: "Smallcaps"}, gosmallcaps.TTF)
register(
text.Font{Variant: "Smallcaps", Style: text.Italic},
gosmallcapsitalic.TTF,
)
// Ensure that any outside appends will not reuse the backing store.
n := len(collection)
collection = collection[:n:n]
},
)
return collection
}
func register(fnt text.Font, ttf []byte) {
face, err := opentype.Parse(ttf)
if err != nil {
panic(fmt.Errorf("failed to parse font: %v", err))
}
fnt.Typeface = "Go"
collection = append(collection, text.FontFace{Font: fnt, Face: face})
}