42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
package canvas
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import (
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"os"
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"path/filepath"
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"github.com/tdewolff/canvas"
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"github.com/tdewolff/canvas/renderers"
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)
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func CharacterAnalyse(character string) string{
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const fontSize = 30.0
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const hFontToPixelRatio = 0.3
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const wFontToPixelRatio = 0.225
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fileName := "tmp/nf-icon-nf.png"
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// Create new canvas of dimension 100x100 mm
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c := canvas.New(fontSize * wFontToPixelRatio, fontSize * hFontToPixelRatio)
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// Create a canvas context used to keep drawing state
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ctx := canvas.NewContext(c)
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nerdFont := canvas.NewFontFamily("nf")
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if err := nerdFont.LoadFontFile("0xProtoNerdFontMono-Regular.ttf", canvas.FontRegular); err != nil {
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panic(err)
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}
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face := nerdFont.Face(fontSize, canvas.White, canvas.FontNormal, canvas.FontNormal)
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background := canvas.Rectangle(ctx.Width() + 1, ctx.Height() + 1);
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ctx.SetFillColor(canvas.Black)
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ctx.DrawPath(0, 0, background)
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ctx.DrawText(0, 1, canvas.NewTextLine(face, character, canvas.Left))
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// Rasterize the canvas and write to a PNG file with 3.2 dots-per-mm (320x320 px)
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_ = os.Mkdir(filepath.Join(".", "tmp"), os.ModePerm)
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if err := renderers.Write(fileName, c, canvas.DPMM(3.2)); err != nil {
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panic(err)
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}
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return fileName
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}
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