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