mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 19:28:57 +01:00
141 lines
3.3 KiB
Go
141 lines
3.3 KiB
Go
// Copyright 2023 The Ebitengine Authors
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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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package main
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import (
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"bytes"
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_ "embed"
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"fmt"
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"log"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/inpututil"
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"github.com/hajimehoshi/ebiten/v2/text/v2"
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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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//go:embed FiraSans-Regular.ttf
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var firaSansRegular []byte
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var firaSansFaceSource *text.GoTextFaceSource
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func init() {
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s, err := text.NewGoTextFaceSource(bytes.NewReader(firaSansRegular))
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if err != nil {
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log.Fatal(err)
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}
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firaSansFaceSource = s
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}
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type Game struct {
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// liga represents 'Standard Ligatures'.
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// https://learn.microsoft.com/en-us/typography/opentype/spec/features_ko#tag-liga
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liga uint32
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// tnum represents 'Tabular Figures'.
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// https://learn.microsoft.com/en-us/typography/opentype/spec/features_pt#tag-tnum
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tnum uint32
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// smcp represents 'Small Capitals'.
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// https://learn.microsoft.com/en-us/typography/opentype/spec/features_pt#tag-smcp
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smcp uint32
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// zero represents 'Slashed Zero'.
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// https://learn.microsoft.com/en-us/typography/opentype/spec/features_uz#tag-zero
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zero uint32
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}
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func (g *Game) Update() error {
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if inpututil.IsKeyJustPressed(ebiten.KeyL) {
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if g.liga == 0 {
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g.liga = 1
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} else {
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g.liga = 0
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}
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}
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if inpututil.IsKeyJustPressed(ebiten.KeyT) {
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if g.tnum == 0 {
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g.tnum = 1
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} else {
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g.tnum = 0
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}
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}
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if inpututil.IsKeyJustPressed(ebiten.KeyS) {
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if g.smcp == 0 {
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g.smcp = 1
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} else {
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g.smcp = 0
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}
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}
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if inpututil.IsKeyJustPressed(ebiten.KeyZ) {
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if g.zero == 0 {
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g.zero = 1
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} else {
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g.zero = 0
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}
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}
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return nil
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}
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func (g *Game) Draw(screen *ebiten.Image) {
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// Draw the instruction.
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inst := fmt.Sprintf(`Press keys to toggle font features.
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[L] 'liga' (Standard Ligatures) (%d)
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[T] 'tnum' (Tabular Figures) (%d)
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[S] 'smcp' (Small Capitals) (%d)
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[Z] 'zero' (Slashed Zero) (%d)`, g.liga, g.tnum, g.smcp, g.zero)
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op := &text.DrawOptions{}
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op.GeoM.Translate(20, 20)
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op.LineSpacing = 30
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text.Draw(screen, inst, &text.GoTextFace{
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Source: firaSansFaceSource,
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Size: 20,
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}, op)
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// Draw the sample text.
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const sampleText = `0 (Number) / O (Alphabet)
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ffi
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3.14
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2.71`
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op = &text.DrawOptions{}
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op.GeoM.Translate(20, screenHeight/2)
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op.LineSpacing = 50
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f := &text.GoTextFace{
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Source: firaSansFaceSource,
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Size: 40,
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}
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f.SetFeature(text.MustParseTag("liga"), g.liga)
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f.SetFeature(text.MustParseTag("tnum"), g.tnum)
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f.SetFeature(text.MustParseTag("smcp"), g.smcp)
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f.SetFeature(text.MustParseTag("zero"), g.zero)
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text.Draw(screen, sampleText, f, op)
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}
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func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
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return screenWidth, screenHeight
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}
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func main() {
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ebiten.SetWindowSize(screenWidth, screenHeight)
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ebiten.SetWindowTitle("Font Feature (Ebitengine Demo)")
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if err := ebiten.RunGame(&Game{}); err != nil {
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log.Fatal(err)
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}
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}
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