mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-04 17:05:38 +00:00
Elias Naur
b07d34354e
Before this change, package font implemented a global font registry, with the usual problems of package global state. This change deletes the global registry and introduces the text.Collection type for representing a list of fonts and their faces. Collection exports Lookup that finds the closest match and its face. The existing FontRegistry is renamed to Cache to reflect its new limited functionality: a cache of shapes and measurements on top of a Collection. Then, material.NewTheme is changed to take a Collection and initialize a Cache. Updates gio#19 because multiple windows require a separate (writable) Cache per window, while (read-only) Collections may be shared. Signed-off-by: Elias Naur <mail@eliasnaur.com>
64 lines
2.2 KiB
Go
64 lines
2.2 KiB
Go
// 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"
|
|
|
|
"gioui.org/font/opentype"
|
|
"gioui.org/text"
|
|
"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"
|
|
)
|
|
|
|
var (
|
|
once sync.Once
|
|
collection *text.Collection
|
|
)
|
|
|
|
func Collection() *text.Collection {
|
|
once.Do(func() {
|
|
c := new(text.Collection)
|
|
register(c, text.Font{}, goregular.TTF)
|
|
register(c, text.Font{Style: text.Italic}, goitalic.TTF)
|
|
register(c, text.Font{Weight: text.Bold}, gobold.TTF)
|
|
register(c, text.Font{Style: text.Italic, Weight: text.Bold}, gobolditalic.TTF)
|
|
register(c, text.Font{Weight: text.Medium}, gomedium.TTF)
|
|
register(c, text.Font{Weight: text.Medium, Style: text.Italic}, gomediumitalic.TTF)
|
|
register(c, text.Font{Variant: "Mono"}, gomono.TTF)
|
|
register(c, text.Font{Variant: "Mono", Weight: text.Bold}, gomonobold.TTF)
|
|
register(c, text.Font{Variant: "Mono", Weight: text.Bold, Style: text.Italic}, gomonobolditalic.TTF)
|
|
register(c, text.Font{Variant: "Mono", Style: text.Italic}, gomonoitalic.TTF)
|
|
register(c, text.Font{Variant: "Mono", Style: text.Italic}, gomonoitalic.TTF)
|
|
register(c, text.Font{Variant: "Smallcaps"}, gosmallcaps.TTF)
|
|
register(c, text.Font{Variant: "Smallcaps", Style: text.Italic}, gosmallcapsitalic.TTF)
|
|
collection = c
|
|
})
|
|
return collection
|
|
}
|
|
|
|
func register(c *text.Collection, fnt text.Font, ttf []byte) {
|
|
face, err := opentype.Parse(ttf)
|
|
if err != nil {
|
|
panic(fmt.Sprintf("failed to parse font: %v", err))
|
|
}
|
|
fnt.Typeface = "Go"
|
|
c.Register(fnt, face)
|
|
}
|