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