SoftwareApp
b28e9dca37
The 7-inch roots capture was pure app background (Compose had not composed its first frame yet, though the system bars had drawn) so it measured as uniform. made-store-screenshots.sh now measures each capture and refuses to normalise a blank one.
91 lines
3.8 KiB
Bash
Executable File
91 lines
3.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Normalises `adb exec-out screencap` captures into the files that get uploaded to Play.
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#
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# ./tools/make-store-screenshots.sh # phone -> 1080x2160
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# FORM_FACTOR=tablet-7in ./tools/make-store-screenshots.sh # 7-inch -> 1200x1920
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# FORM_FACTOR=tablet-10in ./tools/make-store-screenshots.sh # 10-inch -> 2560x1600
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#
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# store-assets/raw-screenshots/<form>/ the raw captures (git-ignored)
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# store-assets/screenshots/<form>/ what gets uploaded (committed)
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#
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# Play's rule that actually bites: JPEG or 24-bit PNG **without alpha**, shorter side >= 320,
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# longer side <= 3840, and **longer side <= 2x the shorter side**. A phone at its native
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# 1080x2400 is 2.22:1 and is therefore REJECTED, which is why the phone path crops system
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# chrome (status + navigation bars) before clamping to 2:1. A tablet frame is already inside
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# the 2:1 cap on every profile the SDK ships, so its crop defaults to 0 and is opt-in.
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#
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# Play accepts portrait or landscape for the tablet slots; the targets below match the AVDs
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# this repo is tested against (the 10-inch one is a landscape profile), and the extent step
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# normalises to them either way.
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set -euo pipefail
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here="$(cd "$(dirname "$0")" && pwd)"
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repo="$(dirname "$here")"
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form="${FORM_FACTOR:-phone}"
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case "$form" in
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phone) target_w=1080; target_h=2160; default_status=93; default_nav=130 ;;
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tablet-7in) target_w=1200; target_h=1920; default_status=0; default_nav=0 ;;
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tablet-10in) target_w=2560; target_h=1600; default_status=0; default_nav=0 ;;
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*) echo "Unknown FORM_FACTOR '$form' (phone|tablet-7in|tablet-10in)" >&2; exit 1 ;;
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esac
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status_px="${STATUS_BAR_PX:-$default_status}"
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nav_px="${NAV_BAR_PX:-$default_nav}"
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# A headless AVD whose display has slept, or an app whose first frame has not composed yet,
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# produces a screencap of pure background. The top and bottom system bars are still drawn,
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# so the file is not *obviously* empty — but the app area has no ink at all. That is
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# invisible in a thumbnail and unacceptable on a listing, so each capture is measured
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# before it is normalised. `sample_inset` shaves the top and bottom margin (where the
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# system bars sit on every profile here) so the measurement covers app content only.
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blank_threshold="${BLANK_THRESHOLD:-0.005}"
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sample_inset=150
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raw="$repo/store-assets/raw-screenshots/$form"
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out="$repo/store-assets/screenshots/$form"
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mkdir -p "$out"
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shopt -s nullglob
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captures=("$raw"/*.png)
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if [ ${#captures[@]} -eq 0 ]; then
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echo "No captures in $raw — take some with:" >&2
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echo " adb exec-out screencap -p > $raw/01-roots.png" >&2
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exit 1
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fi
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echo "Normalising ${#captures[@]} capture(s) from $raw -> $out"
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blanks=0
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for capture in "${captures[@]}"; do
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name="$(basename "$capture")"
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content_stddev="$(magick "$capture" -shave 0x"$sample_inset" \
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-colorspace gray -format '%[fx:standard_deviation]' info:)"
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if awk -v s="$content_stddev" -v t="$blank_threshold" 'BEGIN { exit !(s < t) }'; then
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printf ' %s BLANK (content stddev %s) — not normalised\n' "$name" "$content_stddev" >&2
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blanks=$((blanks + 1))
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continue
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fi
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magick "$capture" \
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-gravity North -chop 0x"$status_px" \
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-gravity South -chop 0x"$nav_px" \
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+repage \
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-resize "${target_w}x${target_h}^" \
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-gravity Center -extent "${target_w}x${target_h}" \
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-alpha remove -alpha off PNG24:"$out/$name"
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printf ' %s ' "$out/$name"
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magick identify -format '%wx%h %[channels] %b\n' "$out/$name"
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done
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if [ "$blanks" -gt 0 ]; then
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echo "ERROR: $blanks capture(s) were blank and are missing from $out." >&2
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echo " Wake the display and wait for the app's first frame, then re-capture:" >&2
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echo " adb shell svc power stayon true" >&2
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echo " adb shell input keyevent KEYCODE_WAKEUP" >&2
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exit 1
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fi
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echo "Done."
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