/
resources.go
166 lines (137 loc) · 3.71 KB
/
resources.go
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package resources
import (
"bytes"
"embed"
"errors"
"image"
"io"
"os"
"strings"
"github.com/golang/freetype/truetype"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/audio/mp3"
"github.com/hajimehoshi/ebiten/v2/audio/vorbis"
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
"github.com/spf13/viper"
"github.com/tinne26/etxt"
"golang.org/x/image/font"
"golang.org/x/image/font/opentype"
"golang.org/x/image/font/sfnt"
log "github.com/sirupsen/logrus"
)
const SampleRate = 44100
var (
UserConfigFile string
UserKeymapFile string
//go:embed audio fonts icons maps menu missions shaders sprites textures all:units all:weapons
embedded embed.FS
)
func init() {
viper.SetConfigName("config")
viper.SetConfigType("json")
viper.SetEnvPrefix("pixelmek")
viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
viper.AutomaticEnv()
userConfigPath, _ := os.UserHomeDir()
if userConfigPath == "" {
userConfigPath = "./"
}
userConfigPath += "/.pixelmek-3d"
UserConfigFile = userConfigPath + "/config.json"
UserKeymapFile = userConfigPath + "/keymap.json"
viper.AddConfigPath(userConfigPath)
err := viper.ReadInConfig()
if err != nil {
log.Error(err)
}
}
func NewImageFromFile(path string) (*ebiten.Image, image.Image, error) {
f, err := FileAt(path)
if err != nil {
return nil, nil, err
}
defer f.Close()
eb, im, err := ebitenutil.NewImageFromReader(f)
return eb, im, err
}
func NewScaledImageFromFile(path string, scale float64) (*ebiten.Image, image.Image, error) {
eb, im, err := NewImageFromFile(path)
if err != nil {
return eb, im, err
}
if scale == 1.0 {
return eb, im, err
}
op := &ebiten.DrawImageOptions{}
op.Filter = ebiten.FilterNearest
op.GeoM.Scale(scale, scale)
scaledWidth, scaledHeight := float64(eb.Bounds().Dx())*scale, float64(eb.Bounds().Dy())*scale
scaledImage := ebiten.NewImage(int(scaledWidth), int(scaledHeight))
scaledImage.DrawImage(eb, op)
return scaledImage, scaledImage, err
}
func NewFontFromFile(path string) (*sfnt.Font, string, error) {
b, err := ReadFile(path)
if err != nil {
return nil, "", err
}
return etxt.ParseFontBytes(b)
}
func LoadFont(path string, size float64) (font.Face, error) {
fontData, err := ReadFile(path)
if err != nil {
return nil, err
}
switch {
case strings.HasSuffix(path, ".otf"):
otfFont, err := opentype.Parse(fontData)
if err != nil {
return nil, err
}
return opentype.NewFace(otfFont, &opentype.FaceOptions{
Size: size,
DPI: 72,
Hinting: font.HintingFull,
})
case strings.HasSuffix(path, ".ttf"):
ttfFont, err := truetype.Parse(fontData)
if err != nil {
return nil, err
}
return truetype.NewFace(ttfFont, &truetype.Options{
Size: size,
DPI: 72,
Hinting: font.HintingFull,
}), nil
}
return nil, errors.New("unhandled font extension for " + path)
}
func NewAudioStreamFromFile(path string) (io.ReadSeeker, int64, error) {
audioBytes, err := ReadFile(path)
if err != nil || audioBytes == nil {
return nil, 0, err
}
return NewAudioStream(audioBytes, path)
}
func NewAudioStream(audioBytes []byte, path string) (io.ReadSeeker, int64, error) {
reader := bytes.NewReader(audioBytes)
var err error
switch {
case strings.HasSuffix(path, ".mp3"):
stream, err := mp3.DecodeWithSampleRate(SampleRate, reader)
return stream, stream.Length(), err
case strings.HasSuffix(path, ".ogg"):
stream, err := vorbis.DecodeWithSampleRate(SampleRate, reader)
return stream, stream.Length(), err
default:
err = errors.New("unhandled audio extension for " + path)
}
return nil, 0, err
}
func NewShaderFromFile(path string) (*ebiten.Shader, error) {
shaderData, err := ReadFile(path)
if err != nil {
return nil, err
}
return ebiten.NewShader(shaderData)
}