92 lines
2.8 KiB
Bash
Executable file
92 lines
2.8 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -euo pipefail
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repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
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cd "$repo_root"
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output_dir_arg="${1:-design/brand/low-res}"
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if [[ "$output_dir_arg" = /* ]]; then
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output_dir="$output_dir_arg"
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else
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output_dir="$repo_root/$output_dir_arg"
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fi
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master="$output_dir/burrow-icon-1024.png"
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checked_in_master="$repo_root/design/brand/burrow-owl-icon-master.png"
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source_master="$checked_in_master"
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sizes=(16 20 24 29 32 40 48 64 80 128 256)
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require_tool() {
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if ! command -v "$1" >/dev/null 2>&1; then
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echo "error: required tool not found: $1" >&2
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exit 127
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fi
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}
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require_tool magick
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require_tool awk
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mkdir -p "$output_dir"
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magick "$checked_in_master" -colorspace sRGB -strip "PNG32:$master"
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printf "size,colors,gray_stddev,status\n" >"$output_dir/report.csv"
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for size in "${sizes[@]}"; do
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image="$output_dir/burrow-icon-${size}.png"
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magick "$source_master" -colorspace sRGB -resize "${size}x${size}!" -strip "PNG32:$image"
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actual="$(magick "$image" -format "%wx%h" info:)"
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if [[ "$actual" != "${size}x${size}" ]]; then
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echo "error: $image rendered as $actual, expected ${size}x${size}" >&2
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exit 1
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fi
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colors="$(magick "$image" -format "%k" info:)"
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stddev="$(magick "$image" -colorspace Gray -format "%[fx:standard_deviation]" info:)"
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min_colors=$((size * 4))
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if (( min_colors < 48 )); then
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min_colors=48
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fi
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if (( min_colors > 900 )); then
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min_colors=900
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fi
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awk -v size="$size" -v colors="$colors" -v min_colors="$min_colors" -v stddev="$stddev" '
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BEGIN {
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if (colors < min_colors) {
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printf "error: %dpx icon has only %d colors; expected at least %d\n", size, colors, min_colors > "/dev/stderr";
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exit 1;
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}
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if (stddev < 0.08) {
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printf "error: %dpx icon grayscale stddev is %.6f; expected at least 0.08\n", size, stddev > "/dev/stderr";
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exit 1;
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}
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}
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'
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printf "%s,%s,%s,ok\n" "$size" "$colors" "$stddev" >>"$output_dir/report.csv"
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done
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preview_inputs=()
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pixel_preview_inputs=()
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for size in 256 128 80 64 48 40 32 29 24 20 16; do
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preview="$output_dir/preview-${size}.png"
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if (( size <= 32 )); then
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filter=Point
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else
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filter=Lanczos
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fi
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magick "$output_dir/burrow-icon-${size}.png" -filter "$filter" -resize 128x128 "$preview"
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preview_inputs+=("$preview")
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if (( size <= 32 )); then
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pixel_preview="$output_dir/pixel-preview-${size}.png"
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magick "$output_dir/burrow-icon-${size}.png" -filter Point -resize 128x128 "$pixel_preview"
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pixel_preview_inputs+=("$pixel_preview")
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fi
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done
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magick -background "#202020" -gravity center "${preview_inputs[@]}" +append "$output_dir/preview-strip.png"
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magick -background "#202020" -gravity center "${pixel_preview_inputs[@]}" +append "$output_dir/pixel-preview-strip.png"
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echo "low-res icon exports written to $output_dir"
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