ebiten/examples/font/main.go
2022-04-09 16:08:20 +09:00

175 lines
12 KiB
Go

// Copyright 2016 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build example
// +build example
package main
import (
"fmt"
"image/color"
"log"
"math/rand"
"time"
"golang.org/x/image/font"
"golang.org/x/image/font/opentype"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
"github.com/hajimehoshi/ebiten/v2/text"
)
const (
screenWidth = 640
screenHeight = 480
)
const sampleText = `The quick brown fox jumps over the lazy dog.`
var (
mplusNormalFont font.Face
mplusBigFont font.Face
jaKanjis = []rune{}
)
func init() {
// table is the list of Japanese Kanji characters in a part of JIS X 0208.
const table = `
亜唖娃阿哀愛挨姶逢葵茜穐悪握渥旭葦芦鯵梓圧斡扱宛姐虻飴絢綾鮎或粟袷安庵按暗案闇鞍杏以伊位依偉囲夷委威尉惟意慰易椅為畏異移維緯胃萎衣謂違遺医井亥域育郁磯一壱溢逸稲茨芋鰯允印咽員因姻引飲淫胤蔭
院陰隠韻吋右宇烏羽迂雨卯鵜窺丑碓臼渦嘘唄欝蔚鰻姥厩浦瓜閏噂云運雲荏餌叡営嬰影映曳栄永泳洩瑛盈穎頴英衛詠鋭液疫益駅悦謁越閲榎厭円園堰奄宴延怨掩援沿演炎焔煙燕猿縁艶苑薗遠鉛鴛塩於汚甥凹央奥往応
押旺横欧殴王翁襖鴬鴎黄岡沖荻億屋憶臆桶牡乙俺卸恩温穏音下化仮何伽価佳加可嘉夏嫁家寡科暇果架歌河火珂禍禾稼箇花苛茄荷華菓蝦課嘩貨迦過霞蚊俄峨我牙画臥芽蛾賀雅餓駕介会解回塊壊廻快怪悔恢懐戒拐改
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蓮連錬呂魯櫓炉賂路露労婁廊弄朗楼榔浪漏牢狼篭老聾蝋郎六麓禄肋録論倭和話歪賄脇惑枠鷲亙亘鰐詫藁蕨椀湾碗腕
`
for _, c := range table {
if c == '\n' {
continue
}
jaKanjis = append(jaKanjis, c)
}
}
func init() {
tt, err := opentype.Parse(fonts.MPlus1pRegular_ttf)
if err != nil {
log.Fatal(err)
}
const dpi = 72
mplusNormalFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
Size: 24,
DPI: dpi,
Hinting: font.HintingFull,
})
if err != nil {
log.Fatal(err)
}
mplusBigFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
Size: 48,
DPI: dpi,
Hinting: font.HintingFull,
})
if err != nil {
log.Fatal(err)
}
// Adjust the line height.
mplusBigFont = text.FaceWithLineHeight(mplusBigFont, 54)
}
func init() {
rand.Seed(time.Now().UnixNano())
}
type Game struct {
counter int
kanjiText string
kanjiTextColor color.RGBA
}
func (g *Game) Update() error {
// Change the text color for each second.
if g.counter%ebiten.MaxTPS() == 0 {
g.kanjiText = ""
for j := 0; j < 4; j++ {
for i := 0; i < 8; i++ {
g.kanjiText += string(jaKanjis[rand.Intn(len(jaKanjis))])
}
g.kanjiText += "\n"
}
g.kanjiTextColor.R = 0x80 + uint8(rand.Intn(0x7f))
g.kanjiTextColor.G = 0x80 + uint8(rand.Intn(0x7f))
g.kanjiTextColor.B = 0x80 + uint8(rand.Intn(0x7f))
g.kanjiTextColor.A = 0xff
}
g.counter++
return nil
}
func (g *Game) Draw(screen *ebiten.Image) {
const x = 20
// Draw info
msg := fmt.Sprintf("TPS: %0.2f", ebiten.CurrentTPS())
text.Draw(screen, msg, mplusNormalFont, x, 40, color.White)
// Draw the sample text
text.Draw(screen, sampleText, mplusNormalFont, x, 80, color.White)
// Draw Kanji text lines
text.Draw(screen, g.kanjiText, mplusBigFont, x, 160, g.kanjiTextColor)
}
func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
return screenWidth, screenHeight
}
func main() {
ebiten.SetWindowSize(screenWidth, screenHeight)
ebiten.SetWindowTitle("Font (Ebiten Demo)")
if err := ebiten.RunGame(&Game{}); err != nil {
log.Fatal(err)
}
}