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Editing: draw-waveform.ts
export function drawWaveform( waveData: number[][], canvas: HTMLCanvasElement, color: string ) { const context = canvas.getContext('2d'); if (!context) return; context.clearRect(0, 0, canvas.width, canvas.height); // mirror context.fillStyle = color; context.globalAlpha = 0.5; waveData.forEach(lineData => { const height = (55 / 100) * lineData[3]; context.fillRect( lineData[0], lineData[1] + lineData[3] + 1, lineData[2], height ); }); // main context.fillStyle = color; context.globalAlpha = 1; waveData.forEach(lineData => { context.fillRect(lineData[0], lineData[1], lineData[2], lineData[3]); }); }
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