update at 2026-03-17 10:37:27

scripts/capture-kindle-screen.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env sh
+set -eu
+
+ROOT_DIR=$(CDPATH= cd -- "$(dirname "$0")/.." && pwd)
+HOST_TARGET=${1:-kindle}
+OUTPUT_BASENAME=${2:-current-screen}
+OUTPUT_DIR=${3:-"$ROOT_DIR/tmp"}
+RUNTIME_ENV_PATH=/mnt/us/dashboard/local/state/theme-runtime.env
+
+mkdir -p "$OUTPUT_DIR"
+
+raw_path="$OUTPUT_DIR/${OUTPUT_BASENAME}-raw.png"
+physical_path="$OUTPUT_DIR/${OUTPUT_BASENAME}-physical.png"
+tmp_download_path="$OUTPUT_DIR/${OUTPUT_BASENAME}-download.tmp"
+
+read_remote_value() {
+  key=$1
+  ssh "$HOST_TARGET" "awk -F= '/^export ${key}=/{gsub(\"\\047\", \"\", \$2); print \$2; exit}' \"$RUNTIME_ENV_PATH\" 2>/dev/null || true"
+}
+
+orientation=$(read_remote_value ORIENTATION)
+device_placement=$(read_remote_value THEME_DEVICE_PLACEMENT)
+
+ssh "$HOST_TARGET" '
+set -eu
+capture_path="/tmp/kindle-dashboard-capture-$$.png"
+fbgrab "$capture_path" >/dev/null 2>&1
+cat "$capture_path"
+rm -f "$capture_path"
+' >"$tmp_download_path"
+
+python3 - "$tmp_download_path" "$raw_path" <<'PY'
+from pathlib import Path
+import sys
+
+download_path = Path(sys.argv[1])
+raw_path = Path(sys.argv[2])
+data = download_path.read_bytes()
+magic = b"\x89PNG\r\n\x1a\n"
+index = data.find(magic)
+if index == -1:
+    raise SystemExit("抓屏结果里没有找到 PNG 头")
+
+raw_path.write_bytes(data[index:])
+download_path.unlink(missing_ok=True)
+PY
+
+case "$orientation:$device_placement" in
+  landscape:logo_right)
+    cp "$raw_path" "$physical_path"
+    # 原始 fbgrab 输出始终是纵向 framebuffer。
+    # Logo 在右侧时，日常评审应优先看 physical 图；
+    # 它等于把 raw 图按设备实际摆放方向逆时针旋转 90 度。
+    sips -r 270 "$physical_path" >/dev/null
+    ;;
+  *)
+    cp "$raw_path" "$physical_path"
+    ;;
+esac
+
+printf 'raw=%s\n' "$raw_path"
+printf 'physical=%s\n' "$physical_path"
+printf 'orientation=%s\n' "${orientation:-unknown}"
+printf 'devicePlacement=%s\n' "${device_placement:-unknown}"