| 1 | #!/usr/bin/env bash |
| 2 | # html-ppt :: render.sh — headless Chrome screenshot(s) |
| 3 | # |
| 4 | # Usage: |
| 5 | # render.sh <html-file> # one PNG, slide 1 |
| 6 | # render.sh <html-file> <N> # N PNGs, slides 1..N, via #/k |
| 7 | # render.sh <html-file> all # autodetect .slide count |
| 8 | # render.sh <html-file> <N> <out-dir> # custom output dir |
| 9 | # |
| 10 | # Requires: Google Chrome at /Applications/Google Chrome.app (macOS). |
| 11 | |
| 12 | set -euo pipefail |
| 13 | |
| 14 | CHROME="/Applications/Google Chrome.app/Contents/MacOS/Google Chrome" |
| 15 | if [[ ! -x "$CHROME" ]]; then |
| 16 | echo "error: Chrome not found at $CHROME" >&2 |
| 17 | exit 1 |
| 18 | fi |
| 19 | |
| 20 | FILE="${1:-}" |
| 21 | if [[ -z "$FILE" ]]; then |
| 22 | echo "usage: render.sh <html> [N|all] [out-dir]" >&2 |
| 23 | exit 1 |
| 24 | fi |
| 25 | if [[ ! -f "$FILE" ]]; then |
| 26 | echo "error: $FILE not found" >&2 |
| 27 | exit 1 |
| 28 | fi |
| 29 | |
| 30 | COUNT="${2:-1}" |
| 31 | OUT="${3:-}" |
| 32 | |
| 33 | ABS="$(cd "$(dirname "$FILE")" && pwd)/$(basename "$FILE")" |
| 34 | STEM="$(basename "${FILE%.*}")" |
| 35 | |
| 36 | if [[ "$COUNT" == "all" ]]; then |
| 37 | COUNT="$(grep -c 'class="slide"' "$FILE" || true)" |
| 38 | [[ -z "$COUNT" || "$COUNT" -lt 1 ]] && COUNT=1 |
| 39 | fi |
| 40 | |
| 41 | if [[ -z "$OUT" ]]; then |
| 42 | if [[ "$COUNT" -gt 1 ]]; then |
| 43 | OUT="$(dirname "$FILE")/${STEM}-png" |
| 44 | mkdir -p "$OUT" |
| 45 | fi |
| 46 | fi |
| 47 | |
| 48 | render_one() { |
| 49 | local url="$1" target="$2" |
| 50 | "$CHROME" \ |
| 51 | --headless=new \ |
| 52 | --disable-gpu \ |
| 53 | --hide-scrollbars \ |
| 54 | --no-sandbox \ |
| 55 | --virtual-time-budget=4000 \ |
| 56 | --window-size=1920,1080 \ |
| 57 | --screenshot="$target" \ |
| 58 | "$url" >/dev/null 2>&1 |
| 59 | echo " ✔ $target" |
| 60 | } |
| 61 | |
| 62 | if [[ "$COUNT" == "1" ]]; then |
| 63 | OUT_FILE="${OUT:-$(dirname "$FILE")/${STEM}.png}" |
| 64 | render_one "file://$ABS" "$OUT_FILE" |
| 65 | else |
| 66 | for i in $(seq 1 "$COUNT"); do |
| 67 | render_one "file://$ABS#/$i" "$OUT/${STEM}_$(printf '%02d' "$i").png" |
| 68 | done |
| 69 | fi |
| 70 | |
| 71 | echo "done: rendered $COUNT slide(s) from $FILE" |
| 72 |