Function fillBackground

src/utils/ansiToPng.ts:162–169

(px: Uint8Array, bg: AnsiColor)

}

function fillBackground(px: Uint8Array, bg: AnsiColor): void {
  for (let i = 0; i < px.length; i += 4) {
    px[i] = bg.r
    px[i + 1] = bg.g
    px[i + 2] = bg.b
    px[i + 3] = 255
  }
}

// Modern terminals render shade chars (░▒▓█) as solid blocks with opacity,
// not the classic VGA dither pattern. Alpha-blend toward background for the