font/gofont: add Go font convenience package

To use the Go font in a Gio program, import it: import _ "gioui.org/font/gofont" Signed-off-by: Elias Naur <mail@eliasnaur.com>
2019-10-13 18:17:37 +02:00
parent edf0d8ef99
commit 445d85efe0
1 changed files with 53 additions and 0 deletions
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+// Package gofont registers the Go fonts in the font registry.
+//
+// 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"
+
+	"gioui.org/font"
+	"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"
+)
+
+func init() {
+	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: "Mono", Style: text.Italic}, gomonoitalic.TTF)
+	register(text.Font{Variant: "Smallcaps"}, gosmallcaps.TTF)
+	register(text.Font{Variant: "Smallcaps", Style: text.Italic}, gosmallcapsitalic.TTF)
+}
+
+func register(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"
+	font.Register(fnt, face)
+}