Function _paintTupletHelper

packages/alphatab/src/rendering/LineBarRenderer.ts:220–448

(
        cx: number,
        cy: number,
        canvas: ICanvas,
        h: TupletGroup,
        beatElement: BeatSubElement,
        bracketsAsArcs: boolean
    )

    }

    private _paintTupletHelper(
        cx: number,
        cy: number,
        canvas: ICanvas,
        h: TupletGroup,
        beatElement: BeatSubElement,
        bracketsAsArcs: boolean
    ): void {
        const res = this.resources;
        const oldAlign: TextAlign = canvas.textAlign;
        const oldBaseLine = canvas.textBaseline;
        canvas.color = h.voice.index === 0 ? this.resources.mainGlyphColor : this.resources.secondaryGlyphColor;
        canvas.textAlign = TextAlign.Center;
        canvas.textBaseline = TextBaseline.Middle;
        let s: MusicFontSymbol[];
        const num: number = h.beats[0].tupletNumerator;
        const den: number = h.beats[0].tupletDenominator;
        // list as in Guitar Pro 7. for certain tuplets only the numerator is shown
        if (num === 2 && den === 3) {
            s = [MusicFontSymbol.Tuplet2];
        } else if (num === 3 && den === 2) {
            s = [MusicFontSymbol.Tuplet3];
        } else if (num === 4 && den === 6) {
            s = [MusicFontSymbol.Tuplet4];
        } else if (num === 5 && den === 4) {
            s = [MusicFontSymbol.Tuplet5];
        } else if (num === 6 && den === 4) {
            s = [MusicFontSymbol.Tuplet6];
        } else if (num === 7 && den === 4) {
            s = [MusicFontSymbol.Tuplet7];
        } else if (num === 9 && den === 8) {
            s = [MusicFontSymbol.Tuplet9];
        } else if (num === 10 && den === 8) {
            s = [MusicFontSymbol.Tuplet1, MusicFontSymbol.Tuplet0];
        } else if (num === 11 && den === 8) {
            s = [MusicFontSymbol.Tuplet1, MusicFontSymbol.Tuplet1];
        } else if (num === 12 && den === 8) {
            s = [MusicFontSymbol.Tuplet1, MusicFontSymbol.Tuplet2];
        } else if (num === 13 && den === 8) {
            s = [MusicFontSymbol.Tuplet1, MusicFontSymbol.Tuplet3];
        } else {
            s = [];
            const zero = MusicFontSymbol.Tuplet0 as number;
            if (num > 10) {
                const tens = Math.floor(num / 10);
                s.push((zero + tens) as MusicFontSymbol);
                s.push((zero + (num - 10 * tens)) as MusicFontSymbol);
            } else {
                s.push((zero + num) as MusicFontSymbol);
            }

            s.push(MusicFontSymbol.TupletColon);

            if (den > 10) {
                const tens = Math.floor(den / 10);
                s.push((zero + tens) as MusicFontSymbol);
                s.push((zero + (den - 10 * tens)) as MusicFontSymbol);
            } else {