Optimize PortMaster low-memory profile

scripts/prepare_portmaster_assets.sh

@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+if [[ $# -ne 1 ]]; then
+	echo "usage: scripts/prepare_portmaster_assets.sh <temporary-project-root>" >&2
+	exit 2
+fi
+
+readonly PROJECT_ROOT="$1"
+readonly GENERAL_TEXTURE_LIMIT=128
+readonly GAMEPLAY_TEXTURE_LIMIT=64
+readonly AUDIO_SAMPLE_RATE=22050
+
+if [[ ! -f "${PROJECT_ROOT}/project.godot" ]]; then
+	echo "PortMaster asset project is missing project.godot: ${PROJECT_ROOT}" >&2
+	exit 1
+fi
+
+limit_texture_imports() {
+	local asset_root="$1"
+	local size_limit="$2"
+	local import_file
+	local updated=0
+
+	if [[ ! -d "${asset_root}" ]]; then
+		return
+	fi
+	while IFS= read -r -d '' import_file; do
+		if ! grep -q '^importer="texture"$' "${import_file}"; then
+			continue
+	fi
+		if ! grep -q '^process/size_limit=' "${import_file}"; then
+			continue
+	fi
+		sed -i \
+			-e 's|^compress/mode=.*$|compress/mode=2|' \
+			-e "s|^process/size_limit=.*$|process/size_limit=${size_limit}|" \
+			"${import_file}"
+		updated=$((updated + 1))
+	done < <(find "${asset_root}" -type f -name '*.import' -print0)
+	printf 'PortMaster texture limit %d px: %d imports under %s\n' \
+		"${size_limit}" "${updated}" "${asset_root#${PROJECT_ROOT}/}"
+}
+
+
+configure_audio_imports() {
+	local asset_root="$1"
+	local import_file
+	local updated=0
+
+	if [[ ! -d "${asset_root}" ]]; then
+		return
+	fi
+	while IFS= read -r -d '' import_file; do
+		if ! grep -q '^importer="wav"$' "${import_file}"; then
+			continue
+		fi
+		sed -i \
+			-e 's|^force/mono=.*$|force/mono=true|' \
+			-e 's|^force/max_rate=.*$|force/max_rate=true|' \
+			-e "s|^force/max_rate_hz=.*$|force/max_rate_hz=${AUDIO_SAMPLE_RATE}|" \
+			-e 's|^compress/mode=.*$|compress/mode=2|' \
+			"${import_file}"
+		updated=$((updated + 1))
+	done < <(find "${asset_root}" -type f -name '*.wav.import' -print0)
+	printf 'PortMaster audio profile %d Hz mono: %d imports under %s\n' \
+		"${AUDIO_SAMPLE_RATE}" "${updated}" \
+		"${asset_root#${PROJECT_ROOT}/}"
+}
+
+# The entire PortMaster project uses a deliberately small, VRAM-compressed
+# texture ceiling. Fonts are unaffected, preserving readable interface text
+# while raster artwork is reduced for one-gigabyte shared-memory devices.
+limit_texture_imports "${PROJECT_ROOT}" "${GENERAL_TEXTURE_LIMIT}"
+
+# These catalogs contain most of the authored high-resolution textures and
+# account for the largest runtime residency. At a 640x480 output, 64 pixels
+# remains sufficient for the deliberately low-fidelity light profile.
+for gameplay_root in \
+	"art/exported/characters" \
+	"art/exported/environment" \
+	"art/exported/items" \
+	"fish/species" \
+	"gathering" \
+	"items/icons" \
+	"world"; do
+	limit_texture_imports \
+		"${PROJECT_ROOT}/${gameplay_root}" \
+		"${GAMEPLAY_TEXTURE_LIMIT}"
+done
+
+# Short speech, call, and gameplay effects remain available, but use a small
+# mono QOA representation to reduce both package and resident sample memory.
+configure_audio_imports "${PROJECT_ROOT}/audio/sfx"
+configure_audio_imports "${PROJECT_ROOT}/sound/dialogue"