mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
110 lines
2.5 KiB
Go
110 lines
2.5 KiB
Go
// Copyright 2016 Hajime Hoshi
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build example
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package main
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import (
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"image"
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"io/ioutil"
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"log"
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"github.com/golang/freetype/truetype"
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/ebitenutil"
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"golang.org/x/image/font"
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"golang.org/x/image/math/fixed"
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)
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const (
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screenWidth = 640
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screenHeight = 480
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)
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var (
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textImage *ebiten.Image
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)
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var text = []string{
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"The quick brown fox jumps over the lazy dog.",
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"",
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// A head part of a Japanese novel 山月記 (Sangetsuki)
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// See http://www.aozora.gr.jp/cards/000119/files/624_14544.html.
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"隴西の李徴は博学才穎、天宝の末年、",
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"若くして名を虎榜に連ね、",
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"ついで江南尉に補せられたが、",
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"性、狷介、自ら恃むところ頗厚く、",
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"賤吏に甘んずるを潔しとしなかった。",
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}
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func parseFont() error {
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f, err := ebitenutil.OpenFile("_resources/fonts/mplus-1p-regular.ttf")
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if err != nil {
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return err
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}
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defer func() {
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_ = f.Close()
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}()
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b, err := ioutil.ReadAll(f)
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if err != nil {
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return err
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}
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tt, err := truetype.Parse(b)
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if err != nil {
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return err
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}
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w, h := textImage.Size()
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dst := image.NewRGBA(image.Rect(0, 0, w, h))
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const size = 24
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const dpi = 72
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d := &font.Drawer{
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Dst: dst,
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Src: image.White,
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Face: truetype.NewFace(tt, &truetype.Options{
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Size: size,
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DPI: dpi,
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Hinting: font.HintingFull,
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}),
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}
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y := size
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for _, s := range text {
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d.Dot = fixed.P(0, y)
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d.DrawString(s)
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y += size
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}
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return textImage.ReplacePixels(dst.Pix)
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}
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func update(screen *ebiten.Image) error {
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if err := screen.DrawImage(textImage, &ebiten.DrawImageOptions{}); err != nil {
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return err
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}
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return nil
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}
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func main() {
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var err error
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textImage, err = ebiten.NewImage(screenWidth, screenHeight, ebiten.FilterNearest)
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if err != nil {
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log.Fatal(err)
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}
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if err := parseFont(); err != nil {
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log.Fatal(err)
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}
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if err := ebiten.Run(update, screenWidth, screenHeight, 1, "Font (Ebiten Demo)"); err != nil {
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log.Fatal(err)
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}
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}
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