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| #!/bin/bash | |
| set -e | |
| SRC=home.pdf | |
| CROPPED=cropped.pdf | |
| # Output sizes | |
| SIZE_FAVICON_32=32 | |
| SIZE_FAVICON_192=192 | |
| SIZE_APPLE_TOUCH=180 | |
| ############################################################################## | |
| # STEP 0: Use Ghostscript to apply Preview.app's CropBox as the new MediaBox | |
| ############################################################################## | |
| gs -o "$CROPPED" \ | |
| -sDEVICE=pdfwrite \ | |
| -dUseCropBox \ | |
| "$SRC" | |
| ############################################################################## | |
| # STEP 1: Render PNGs using Poppler (pdftocairo) | |
| ############################################################################## | |
| # 32px favicon → 白背景PNG → 白を透過に | |
| pdftocairo -png -singlefile -scale-to $SIZE_FAVICON_32 "$CROPPED" tmp-32 | |
| magick tmp-32.png \ | |
| -alpha set -fuzz 2% -transparent white \ | |
| favicon-32.png | |
| rm tmp-32.png | |
| # 192px favicon → 同様に白を透過に | |
| pdftocairo -png -singlefile -scale-to $SIZE_FAVICON_192 "$CROPPED" tmp-192 | |
| magick tmp-192.png \ | |
| -alpha set -fuzz 2% -transparent white \ | |
| favicon-192.png | |
| rm tmp-192.png | |
| # Apple Touch Icon (背景白のまま／非透過) | |
| pdftocairo -png -singlefile -scale-to $SIZE_APPLE_TOUCH "$CROPPED" tmp-apple | |
| magick tmp-apple.png \ | |
| -resize ${SIZE_APPLE_TOUCH}x${SIZE_APPLE_TOUCH} \ | |
| -background white -flatten \ | |
| apple-touch-icon.png | |
| rm tmp-apple.png | |
| ############################################################################## | |
| # STEP 2: Generate multi-resolution favicon.ico | |
| ############################################################################## | |
| # ICO 用 PNG を生成（まずは白背景） | |
| pdftocairo -png -singlefile -scale-to 16 "$CROPPED" tmp-16 | |
| pdftocairo -png -singlefile -scale-to 32 "$CROPPED" tmp-32ico | |
| pdftocairo -png -singlefile -scale-to 48 "$CROPPED" tmp-48 | |
| pdftocairo -png -singlefile -scale-to 64 "$CROPPED" tmp-64 | |
| # それぞれ白を透過に変換 | |
| magick tmp-16.png -alpha set -fuzz 2% -transparent white tmp-16.png | |
| magick tmp-32ico.png -alpha set -fuzz 2% -transparent white tmp-32ico.png | |
| magick tmp-48.png -alpha set -fuzz 2% -transparent white tmp-48.png | |
| magick tmp-64.png -alpha set -fuzz 2% -transparent white tmp-64.png | |
| # ICO に統合（透過背景のまま） | |
| magick tmp-16.png tmp-32ico.png tmp-48.png tmp-64.png favicon.ico | |
| # Cleanup | |
| rm "$CROPPED" tmp-16.png tmp-32ico.png tmp-48.png tmp-64.png |
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