63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
package main
|
|
|
|
import (
|
|
"image"
|
|
"image/color"
|
|
"io/ioutil"
|
|
|
|
"golang.org/x/image/font"
|
|
"golang.org/x/image/math/fixed"
|
|
|
|
"github.com/golang/freetype"
|
|
"github.com/golang/freetype/truetype"
|
|
)
|
|
|
|
const GlyphRatio = 0.85
|
|
|
|
var notoSans = loadNoto()
|
|
|
|
func sized(size float64) font.Face {
|
|
return truetype.NewFace(notoSans, &truetype.Options{
|
|
Size: size,
|
|
Hinting: font.HintingFull,
|
|
DPI: 100,
|
|
})
|
|
}
|
|
|
|
func loadNoto() *truetype.Font {
|
|
fontData, _ := ioutil.ReadFile("/usr/share/fonts/noto/NotoSansMono-Regular.ttf")
|
|
ttf, _ := freetype.ParseFont(fontData)
|
|
return ttf
|
|
}
|
|
|
|
func Text(x, y int, textLength, fontSize float64, color color.RGBA) *textData {
|
|
width := int(textLength * fontSize * GlyphRatio)
|
|
return &textData{
|
|
rect: image.Rect(x, y, x+width, y+int(fontSize)),
|
|
fontSize: fontSize,
|
|
color: color,
|
|
}
|
|
}
|
|
|
|
type textData struct {
|
|
rect image.Rectangle
|
|
fontSize float64
|
|
color color.RGBA
|
|
}
|
|
|
|
func (f *Face) Text(textData *textData, text string) {
|
|
Fill(f.tmp, textData.rect, color.RGBA{})
|
|
|
|
d := &font.Drawer{
|
|
Dst: f.tmp,
|
|
Src: image.NewUniform(textData.color),
|
|
Face: sized(textData.fontSize),
|
|
Dot: fixed.Point26_6{
|
|
X: fixed.Int26_6(textData.rect.Min.X * 64),
|
|
Y: fixed.Int26_6(textData.rect.Max.Y * 64),
|
|
},
|
|
}
|
|
d.DrawString(text)
|
|
|
|
Copy(f.fb, f.tmp, textData.rect)
|
|
}
|